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NCMA Annual Report 2019 FINAL Northern Cities Management Area Technical Group Northern Cities Management Area 2019 Annual Monitoring Report Prepared for City of Arroyo Grande  City of Grover Beach  Oceano Community Services District  City of Pismo Beach April 23, 2020 Prepared by: GSI Water Solutions, Inc. 5855 Capistrano Avenue, Suite C, Atascadero, CA 93422 This page intentionally left blank. Northern Cities Management Area 2019 Annual Monitoring Report This report was prepared by the staff of GSI Water Solutions, Inc., in collaboration with GEI Consultants, Inc., under the supervision of professionals whose signatures appear below. The findings or professional opinion were prepared in accordance with generally accepted professional engineering and geologic practice. Paul A. Sorensen, PG, CHg Principal Hydrogeologist Project Manager Nathan R. Page, PG Consulting Hydrogeologist FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. iv Contents Executive Summary .................................................................................................................................................. 1 Groundwater Conditions ...................................................................................................................................... 1 Groundwater Levels ......................................................................................................................................... 1 Change in Groundwater in Storage ................................................................................................................. 2 Groundwater Quality ......................................................................................................................................... 3 Water Supply and Production/Deliveries ............................................................................................................ 3 Threats to Water Supply ....................................................................................................................................... 4 SECTION 1: Introduction .......................................................................................................................................... 1 1.1 History of the Litigation ............................................................................................................................ 1 1.2 Description of the NCMA Technical Group ............................................................................................. 2 1.3 NCMA TG Mission Statement .................................................................................................................. 3 1.4 Coordination with Management Areas ................................................................................................... 3 1.5 Development of Monitoring Program ...................................................................................................... 4 1.6 Groundwater Monitoring Network ........................................................................................................... 4 1.7 Recent and Ongoing Strategic Initiatives ............................................................................................... 5 1.7.1 Strategic Plan .................................................................................................................................... 5 1.7.2 Central Coast Blue ............................................................................................................................ 6 1.7.3 Phase 1B Groundwater Model ......................................................................................................... 6 SECTION 2: Basin Setting ......................................................................................................................................... 9 2.1 Setting ....................................................................................................................................................... 9 2.2 Precipitation ............................................................................................................................................. 9 2.3 Evapotranspiration ................................................................................................................................... 9 2.4 Geology and Hydrogeology .................................................................................................................... 10 2.5 Groundwater Flow .................................................................................................................................. 10 SECTION 3: Groundwater Conditions .................................................................................................................... 13 3.1 Groundwater Levels ............................................................................................................................... 13 3.1.1 Groundwater Level Contour Maps ................................................................................................. 13 3.1.2 Historical Water Level Trends ........................................................................................................ 14 3.1.3 Sentry Wells and the Deep Well Index .......................................................................................... 14 3.2 Change in Groundwater in Storage ....................................................................................................... 16 3.3 Water Quality .......................................................................................................................................... 16 3.3.1 Quarterly Groundwater Monitoring ................................................................................................ 16 3.3.2 Analytical Results Summary ........................................................................................................... 17 SECTION 4: Water Supply and Production/Delivery ............................................................................................. 19 4.1 Water Supply .......................................................................................................................................... 19 4.1.1 Lopez Lake ...................................................................................................................................... 19 4.1.2 State Water Project ........................................................................................................................ 21 4.1.3 Groundwater ................................................................................................................................... 22 4.1.4 Developed Water ............................................................................................................................ 24 4.1.5 Other Supplies ................................................................................................................................ 24 4.1.6 Total Water Supply Availability ....................................................................................................... 24 4.2 Water Use ............................................................................................................................................... 27 4.2.1 Agricultural Water Supply Requirements ...................................................................................... 27 FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. v 4.2.2 Rural Use ......................................................................................................................................... 32 4.2.3 Urban Production for Potable Use ................................................................................................. 33 4.2.4 2019 Groundwater Pumpage ........................................................................................................ 33 4.2.5 Changes in Water Production ........................................................................................................ 35 SECTION 5: Comparison of Water Supply and Water Production ........................................................................ 37 SECTION 6: Threats to Water Supply ..................................................................................................................... 41 6.1 Threats to Local Groundwater Supply ................................................................................................... 41 6.1.1 Declining Water Levels ................................................................................................................... 41 6.1.2 Seawater Intrusion ......................................................................................................................... 41 6.1.3 Measures to Avoid Seawater Intrusion ......................................................................................... 42 6.2 Threats to State Water Project Supply .................................................................................................. 43 6.3 Threats to Lopez Lake Water Supply .................................................................................................... 43 SECTION 7: Management Activities ....................................................................................................................... 45 7.1 Management Objectives ........................................................................................................................ 45 7.1.1 Share Groundwater Resources and Manage Pumping ................................................................ 48 7.1.2 Enhance Management of NCMA Groundwater ............................................................................. 49 7.1.3 Monitor Supply and Demand and Share Information .................................................................. 50 7.1.4 Manage Groundwater Levels and Prevent Seawater Intrusion ................................................... 51 7.1.5 Protect Groundwater Quality .......................................................................................................... 53 7.1.6 Manage Cooperatively .................................................................................................................... 54 7.1.7 Encourage Water Conservation ..................................................................................................... 55 7.1.8 Evaluate Alternative Sources of Supply ........................................................................................ 60 SECTION 8: References .......................................................................................................................................... 62 Tables Table ES- 1. 2019 Water Production by Source (AF).............................................................................................. 4 Table 1. NCMA TG Representatives ........................................................................................................................ 2 Table 2. Lopez Lake (SLOFCWCD Zone 3 Contractors) Water Allocations (AFY) ................................................ 19 Table 3. Lopez Lake Municipal Diversion LRRP Reduction Strategy .................................................................. 20 Table 4. Lopez Lake Downstream Release LRRP Reduction Strategy ................................................................ 20 Table 5. Lopez Lake 2019 Deliveries .................................................................................................................... 21 Table 6. 2019 NCMA SWP Deliveries .................................................................................................................... 22 Table 7. NCMA Groundwater Allotment and Production from Santa Maria Groundwater Basin, 2019 ........... 24 Table 8. Baseline (Full Allotment) Available Urban Water Supplies (AFY) .......................................................... 25 Table 9. 2019 Available Urban Water Supply, (AF) .............................................................................................. 26 Table 10. 2019 NCMA Crop Acreages and Calculated Evapotranspiration ....................................................... 28 Table 11. Flow Terms Used in Root Zone Routing for IDC Model ....................................................................... 29 Table 12. 2019 IDC Model Results of Monthly Applied Water ............................................................................ 31 Table 13. Estimated Rural Water Production ....................................................................................................... 32 FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. vi Table 14. Urban Water Production for Potable Use (Groundwater and Surface Water, AF) .............................. 33 Table 15. NCMA Groundwater Pumpage from Santa Maria Groundwater Basin, 2019 (AF) ............................ 34 Table 16. Total Water Use (Groundwater and Surface Water, AF) ...................................................................... 35 Table 17. Water Production by Source, 2019 (AF) ............................................................................................... 38 FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. vii Figures All figures are presented at the end of the report. Figure 1. Santa Maria Groundwater Basin Figure 2. Northern Cities Management Area Figure 3. Locations of Monitoring Wells Figure 4. Depths of Monitoring Wells Figure 5. Annual Precipitation 1950 to 2019 Figure 6. Location of Precipitation Stations Figure 7. Monthly and Average Precipitation and Evapotranspiration Figure 8. Groundwater Elevation Contours Spring 2019 Figure 9. Groundwater Elevation Contours Fall 2019 Figure 10. Selected Hydrographs Figure 11. Sentry Well Hydrographs Figure 12. Hydrograph of Deep Well Index Elevation Figure 13. Water Elevation, Conductivity, and Temperature, Well 24B03 Figure 14. Water Elevation, Conductivity, and Temperature, Well 30F03 Figure 15. Water Elevation, Conductivity, and Temperature, Well 30N02 Figure 16. Water Elevation, Conductivity, and Temperature, Well 36L01 Figure 17. Water Elevation, Conductivity, and Temperature, Well 36L02 Figure 18. Water Elevation, Conductivity, and Temperature, Well 32C03 Figure 19. Change in Groundwater Elevation, Deep Aquifer System, April 2018 to April 2019 Figure 20. Change in Groundwater Elevation, Alluvial Aquifer, April 2018 to April 2019 Figure 21. Chloride Concentrations in Monitoring Wells Figure 22. Total Dissolved Solids Concentrations in Monitoring Wells Figure 23. Piper Diagram of Water Quality in Select Monitoring Wells Figure 24. Locations of Municipal Production Wells Figure 25. NCMA Agricultural Land 2019 Figure 26. 2019 NCMA Estimated Agricultural Water Demand and Monthly Precipitation at the SLO No. 795 Gauge Figure 27. Municipal Water Use by Source Figure 28. Total Water Use (Urban, Rural, Ag) by Source Figure 29. Historical TDS, Chloride and Sodium, Index Wells and 30N03 Figure 30. Historical TDS, Chloride and Sodium, Wells 30N02, MW-Blue, and 36L01 FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. viii Appendix Appendix A NCMA Sentry Well Water Level and Water Quality Data FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. ix Abbreviations and Acronyms 2007 County IRWMP 2007 San Luis Obispo County Integrated Regional Water Management Plan 2019 Annual Report Northern Cities Management Area 2019 Annual Monitoring Report ACO San Luis Obispo County Agricultural Commissioner’s Office AFY acre-feet per year Arroyo Grande City of Arroyo Grande CIMIS California Irrigation Management Information System County San Luis Obispo County CSA County Service Area CUP Consumptive Use Program DDW Division of Drinking Water Delta Sacramento-San Joaquin Delta DRI Desert Research Institute DWR California Department of Water Resources ET evapotranspiration Grover Beach City of Grover Beach gpcd gallons per capita daily IDC 2015 Integrated Water Flow Model Demand Calculator IWFM 2015 Integrated Water Flow Model LRRP Low Reservoir Response Plan NAVD 88 North American Vertical Datum of 1988 NCMA Monitoring Program Monitoring Program for the Northern Cities Management Area NCMA Northern Cities Management Area Nipomo station Nipomo Station (No. 202) NMMA Nipomo Mesa Management Area NRCS Natural Resources Conservation Service Oceano CSD Oceano Community Services District OCSD Oceano Community Services District PE Professional Engineer PG&E Pacific Gas & Electric Pismo Beach City of Pismo Beach SGMA Sustainable Groundwater Management Act SLOFCWCD County of San Luis Obispo Flood Control and Water Conservation District SMGB Santa Maria River Valley Groundwater Basin SMGBMA Santa Maria Groundwater Basin Management Area FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. x SMVMA Santa Maria Valley Management Area SSLOCSD South San Luis Obispo County Sanitation District SWP California State Water Project SWRCB State Water Resources Control Board TDS total dissolved solids TG NCMA Technical Group UWMP Urban Water Management Plan FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 1 Executive Summary The 2019 Annual Monitoring Report for the Northern Cities Management Area (NCMA) (Annual Report) is prepared pursuant to the requirements of the 2005 Stipulation for the Santa Maria Groundwater Basin Adjudication (2005 Stipulation) and the January 25, 2008 Judgment After Trial (2008 Judgment). This 2019 Annual Report provides an assessment of hydrologic conditions for the NCMA based on data collected during the calendar year of record. As specified in the Judgment, the NCMA agencies, consisting of the City of Arroyo Grande, City of Grover Beach, City of Pismo Beach, and Oceano Community Services District (OCSD), regularly monitor groundwater in the NCMA and analyze other data pertinent to water supply and demand, including the following:  Land and water uses in the Santa Maria River Valley Groundwater Basin (SMGB or basin)  Sources of supply to meet water demand  Groundwater conditions (including water levels and water quality)  Amount and disposition of NCMA water supplies that are not groundwater Results of the data compilation and analysis for calendar year 2019 are documented and discussed in this 2019 Annual Report. Groundwater Conditions During 2019, water elevations generally increased slightly throughout most of the NCMA portion of the SMGB in response to above-average rainfall in 2019. The generally observed increase in water levels throughout most of the area can be also be attributed to ongoing efforts by all NCMA agencies to minimize groundwater extraction and maximize surface water supply sources while maintaining the water conservation practices and requirements of the recent drought. Groundwater Levels The best indicator of whether the NCMA portion of the SMGB can prevent seawater intrusion is the water elevation in the NCMA sentry wells near the coastline. The average water elevations of three of the key sentry wells make up a Deep Well Index. This index was developed by the NCMA in 2007 to gauge the health of the aquifer. A Deep Well Index value above 7.5 feet above sea level generally indicates that sufficient freshwater flow occurs from the east to the coastline to prevent seawater intrusion. History has shown that a prolonged period in which the Deep Well Index level is below 7.5 feet develops groundwater conditions that pose a risk of seawater intrusion.  Spring 2019. In the mostly urbanized areas north of Arroyo Grande Creek, groundwater is extracted from the deep groundwater aquifers of the Paso Robles Formation and the Careaga sandstone. The water elevation contours in the deep aquifer system in spring of 2019 generally showed a westerly to southwesterly groundwater flow (see Figure 8). These positive groundwater gradients have been developed and maintained primarily because the NCMA agencies have collaborated on water management and conservation efforts. Those efforts have been in response to lower water levels in the Deep Well Index. The combined NCMA efforts are to ensure that flow to the ocean continues to prevent seawater intrusion. April 2019 groundwater elevations in the deep aquifer system main production zone along the coast ranged from 7.5 to 11.1 feet North American Vertical Datum 1988 (NAVD 88).1 Because 1 North American Vertical Datum of 1988 (NAVD 88). Note that NAVD 88 is 2.72 feet lower than mean sea level, as recorded at the Port San Luis tide station datum. https://tidesandcurrents.noaa.gov/datums.html?id=9412110 FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 2 of a limited number of wells and water level data in the southernmost portion of the area dominated by sensitive-species dunes and California State Parks land, the groundwater gradient and flow are generally inferred on the basis of historical records and trends as well as water level data from the Nipomo Mesa Management Area (NMMA) farther east.  The Cienega Valley is in the central area of the NCMA south of Arroyo Grande Creek. Agricultural groundwater production resulted in seasonal drawdown of the alluvial aquifer. Groundwater elevations in the alluvial aquifer in the Cienega Valley were in the range of 10 to 30 feet NAVD 88 in spring 2019. These data show an increase in alluvial groundwater elevations by as much as 13 feet from April 2018 to April 2019. During the recent drought, spring alluvial groundwater elevations showed a subdued pumping trough in the Cienega Valley, with groundwater elevations generally below sea level (NAVD 88) in the center of the depression.  Fall 2019. Groundwater level contours for October 2019 are presented in Figure 9. Groundwater elevations in the alluvial aquifer within the Cienega Valley in October 2019 were 8 to 28 feet lower than elevations in April 2019. These conditions are consistent with the pumping depressions observed historically during the fall within the Cienega Valley. The alluvial groundwater elevation in the pumping depression in October 2019, at (-) 17.6 feet NAVD 88, was 2 feet lower than was present in October 2018. October 2019 groundwater elevations in the deep aquifer system main production zone along the coast ranged from 6.1 to 8.3 feet NAVD 88.  Deep Wells. In 2019, the Deep Well Index started the year above the trigger value with an index value of more than 9 feet in January. It continued to rise, reached a high more than 11 feet in late March, and then began to decline. The index value dropped down to the 7.5-foot trigger value briefly in late October and then immediately began to rise. The index value continued to rise throughout the end of the year and finished 2019 at about 10.5 feet NAVD 88.  NCMA/NMMA Boundary. The water elevation in the San Luis Obispo County monitoring well (Well 32C03) installed to monitor aquifer conditions along the NCMA/NMMA boundary typically exhibits regular seasonal fluctuations. Similar to 2018, the water elevation in the well remained above sea level throughout all of 2019, in contrast to the 2013 through 2016 period when the water levels in the NCMA/NMMA boundary area typically dropped below sea level in August and remained at a low elevation until early October. Change in Groundwater in Storage The change in groundwater in storage in the NCMA portion of the SMGB between April 2018 and April 2019 was estimated on the basis of a comparison of water level contour maps created for these periods. Separate estimates of change in groundwater in storage were computed for both the deep aquifer system and for the alluvial aquifer and then summed together to represent the total NCMA estimated change in groundwater in storage. Comparison of April water levels was chosen to comply with the California Department of Water Resources reporting requirements under the Sustainable Groundwater Management Act (SGMA) to calculate an annual change of groundwater in storage. An increase of groundwater in storage is a reflection of a net increase in water levels across the aquifer. During the period of April 2018 to April 2019, the NCMA portion of the SMGB experienced a net increase of groundwater in storage. The net increase in groundwater levels represented an increase of groundwater in storage from April 2018 to April 2019 of approximately 1,500 acre-feet (AF); that is, there was approximately 1,500 AF more groundwater stored in the NCMA portion of the SMGB in April 2019 than in April 2018. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 3 Groundwater Quality Analytical results of key water quality data (chloride, total dissolved solids [TDS], and sodium) in 2019 were generally consistent with historical concentrations and observed ranges of constituent concentrations. In general, no water quality results were observed that are a cause of concern. None of the water quality results from monitoring wells throughout 2019 indicate an incipient episode or immediate threat of seawater intrusion. Incipient seawater intrusion was indicated in 2009 by elevated concentrations of TDS, sodium, and chloride (i.e., water quality degradation) in wells 30N02, 30N03, and MW- Blue, all of which are screened in the Paso Robles Formation. No indications of seawater intrusion have been observed in wells screened in the underlying Careaga sandstone. As TDS, sodium, and chloride concentrations declined following the 2009–2010 seasons, the location and inland extent of the seawater-freshwater interface is unknown. Water Supply and Production/Deliveries  Total water use in the NCMA in 2019 (including urban use by the NCMA agencies as well as agricultural irrigation and private pumping by rural water users) was 8,296 AF. Except for the water usage in 2016, this is the lowest estimated total water use in the past 30 years or more. Of this amount, Lopez Lake deliveries were 4,385 AF, State Water Project deliveries totaled 567 AF, and groundwater pumping from the NCMA portion of the SMGB accounted for approximately 3,320 AF. This is the lowest production volume from the SMGB in more than 20 years. The City of Arroyo Grande produced 24 AF from its Pismo Formation wells, outside the SMGB, in 2019. The breakdown is shown in Table ES- 1 (following page).  Urban water use in 2019 among the NCMA agencies was 5,660 AF, the second-lowest urban water use in the past 20 years (second only to 2016, at 5,477 AF). Urban water use has ranged from 5,477 AF (2016) to 8,982 AF (2007). Water use generally declined from 2007 to 2016—with only slight increases in the trend in 2012 and 2013—and has only varied slightly since 2016. The decline in pumpage since 2013 was in direct response to a state-wide order by the governor to reduce the amount of water used in urban areas by 25 percent. That goal has been achieved locally by conservation activities implemented by the NCMA agencies.  Agricultural acreage has remained fairly constant. Thus, the annual applied water requirement for agricultural irrigation has been relatively stable though it varies with weather conditions. Acknowledging the variability resulting from weather conditions, agricultural applied water is not expected to change significantly given the relative stability of applied irrigation acreage and cropping patterns in the NCMA. Changes in rural domestic pumping have not been significant. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 4 Table ES- 1. 2019 Water Production by Source (AF) Source Lopez Lake State Water Project SMGB Groundwater Other Supplies1 Total Urban Area Arroyo Grande 2,033 0 81 24 2,138 Grover Beach 782 0 412 0 1,194 Pismo Beach 1048 556 44 0 1,648 Oceano CSD 522 11 147 0 680 Urban Water Use Total 4,385 567 684 24 5,660 Non-Urban Area Agricultural Irrigation Applied Water 0 0 2,506 0 2,506 Rural Water Users 0 0 82 0 82 Non-potable Irrigation by Arroyo Grande 0 0 48 0 48 Total 4,385 567 3,320 24 8,296 Notes: 1 Other Supplies includes groundwater pumped from outside the NCMA boundaries. AF = acre-feet, SMGB = Santa Maria Groundwater Basin, CSD = Community Services District Threats to Water Supply  Total groundwater pumping (urban, agriculture, and rural domestic) from the SMGB in the NCMA was 3,320 AF in 2019, which is 35 percent of the calculated 9,500 acre-feet per year (AFY) long-term basin yield of the NCMA portion of the SMGB.  When pumping is less than the yield of an aquifer, groundwater in storage increases, as evidenced by rising water levels. Groundwater elevations throughout the NCMA portion of the SMGB should rise significantly if several consecutive years of groundwater pumping continues at 30 to 40 percent of the safe yield. Although groundwater levels increased some during 2019 as a result of the relatively wet rainfall year, the data show that the aquifer is still in a tenuous position. The fragile health of the aquifer is illustrated by water elevations at just a few feet above sea level, coupled with the formation of a pumping depression in the alluvial aquifer within the Cienega Valley just west of the NCMA/NMMA boundary. The data indicate that the aquifer has very little ability to withstand any future droughts. Any increase in FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 5 regional pumping, or any other changes that reduce recharge, either directly or through subsurface outflow to the east (Nipomo Mesa) will leave the NCMA with a serious groundwater deficit that may result in seawater intrusion.  Historically, there has been a groundwater high between the NCMA and NMMA, which caused groundwater in the NCMA to flow westward towards the ocean, thereby acting to prevent seawater intrusion. The well- documented pumping depression within the deep aquifer system in the NMMA to the east appears to have lowered the historical groundwater high between the NCMA and the NMMA (as documented in NMMA annual reports). With the loss of this groundwater high, there has been a reversal of groundwater gradients. The apparent development of a landward gradient in the southern portion of the NCMA including the elimination of the groundwater divide likely reduces the historical recharge volume of subsurface inflow into the NCMA. The reduction of groundwater flow to the NCMA creates conditions more likely to result in seawater intrusion in the NCMA and NMMA.  During 2019, there were no indications of seawater intrusion but any increase of groundwater pumping or decrease in rainfall can quickly result in a greater risk of seawater intrusion. This page intentionally left blank. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 1 SECTION 1: Introduction This Northern Cities Management Area 2019 Annual Monitoring Report (2019 Annual Report, or Annual Report) summarizes hydrologic conditions for calendar year 2019 in the Northern Cities Management Area (NCMA) of the Santa Maria River Valley Groundwater Basin (SMGB or the basin) in San Luis Obispo County (County), California (Figure 1). This report was prepared on behalf of four public agencies collectively referred to as the Northern Cities, which include the City of Arroyo Grande (Arroyo Grande), City of Grover Beach (Grover Beach), City of Pismo Beach (Pismo Beach), and the Oceano Community Services District (OCSD; Oceano CSD)2,3 (Figure 2). These agencies, along with local landowners, the County, and the County of San Luis Obispo Flood Control & Water Conservation District (SLOFCWCD) have managed local surface water and groundwater resources since the late 1970s to preserve the long-term integrity of water supplies. 1.1 History of the Litigation The rights to pump groundwater from the SMGB have been in litigation (adjudication) since the late 1990s. The physical solution set forth in the 2005 Stipulation for the Santa Maria Groundwater Basin Adjudication (2005 Stipulation) and the January 25, 2008 Judgment After Trial (2008 Judgment)4 established requirements and goals for the management of the entire SMGB. The Superior Court of California, County of Santa Clara (Court) established three separate management areas, including the NCMA, the Nipomo Mesa Management Area (NMMA), and the Santa Maria Valley Management Area (SMVMA). The Court mandated that each management area form a technical group to monitor the groundwater conditions of its area, to continuously assess the hydrologic conditions of each area, and to prepare an annual report each year to provide the Court with a summary of the previous year’s conditions, actions, and threats. The requirements for the annual report, as directed by the Court in the 2005 Stipulation (June 30, 2005, version, paragraph IV.D.3), are as follows: Within one hundred and twenty days after each Year end, the Management Area Engineers will file an Annual Report with the Court. The Annual Report will summarize the results of the Monitoring Program, changes in groundwater supplies, and any threats to Groundwater supplies. The Annual Report shall also include a tabulation of Management Area water use, including Imported Water availability and use, Return Flow entitlement and use, other Developed Water availability and use, and Groundwater use. Any Stipulating Party may object to the Monitoring Program, the reported results, or the Annual Report by motion. This 2019 Annual Report satisfies the requirements of the Court. The annual report for each calendar year (January 1 to December 31) is submitted to the Court by April 30 of the following calendar year, pursuant to the 2005 Stipulation. As a result of legislation passed by the State of California related to the Sustainable Groundwater Management Act (SGMA) that requires submittal of annual reports and supporting information and data for each adjudicated groundwater basin by April 1 of each year, the 2019 Annual Report is also published to the California Department of Water Resources (DWR) adjudicated basin reporting website.5 The collaborative water supply management approach of the NCMA agencies was recognized by the Court in the 2001 Groundwater Management Agreement (which was based on the 1983 Gentlemen’s Agreement), 2 Each agency may also be individually referred to as an NCMA agency. 3 Portions of Arroyo Grande and Pismo Beach extend outside the NCMA. 4 Santa Maria Valley Water Conservation District v. City of Santa Maria, et al., Case #1-97-CV-770214 Filing #G-79046. (Cal. 2015). 5 The link to the reporting system is available on this DWR page: https://water.ca.gov/Programs/Groundwater- Management/SGMA-Groundwater-Management/Adjudicated-Areas. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 2 formalized in the Settlement Agreement Between Northern Cities, Northern Cities Landowners, and Other Parties (2002 Settlement Agreement or Settlement Agreement) and incorporated in the 2005 Stipulation . On June 30, 2005, the 2005 Stipulation was agreed upon by numerous parties, including the NCMA agencies. The Stipulation included the 2002 Settlement Agreement. The approach then was adopted by the Court in its 2008 Judgment. Although appeals to that decision were filed, a subsequent decision by the Sixth Appellate District (filed November 21, 2012) upheld the Judgment. On February 13, 2013, the Supreme Court of California denied a petition to review the decision. Pursuant to the Court’s continuing jurisdiction, Arroyo Grande, Pismo Beach, and Grover Beach filed a motion on September 29, 2015, requesting that the Court impose moratoriums on certain water extraction and use by stipulating parties within the NMMA. Judge Kirwan denied the motion without prejudice. He did, however, order the parties to meet and confer to address the issues raised in the motion. The meet and confer process continued throughout 2019. The order by the Court precipitated a series of meetings and collaborative actions between the NCMA and NMMA agencies, including the tentative formation of a Seawater Intrusion Working Group to discuss the threat and potential solutions for possible seawater intrusion. 1.2 Description of the NCMA Technical Group Pursuant to a requirement in the 2005 Stipulation, the NCMA Technical Group (TG) was formed (Paragraph IV.C and Paragraph VII). The TG is composed of representatives of each of the NCMA agencies Table 1. Table 1. NCMA TG Representatives Agency Representative City of Arroyo Grande Bill Robeson Public Works Director Shane Taylor Utilities Manager City of Grover Beach Gregory A. Ray, PE Director of Public Works/City Engineer R.J. (Jim) Garing, PE Consulting City Engineer for Water and Sewer City of Pismo Beach Benjamin A. Fine, PE Director of Public Works/City Engineer Oceano CSD Will Clemens General Manager Tony Marracino Utility Systems Supervisor Notes CSD = Community Services District, PE = Professional Engineer Arroyo Grande, Pismo Beach, and Grover Beach contract with Water Systems Consulting, Inc. (WSC), to serve as staff extension to assist the TG in its roles and responsibilities in managing the water supply resources. The full NCMA TG contracts with GSI Water Solutions, Inc., and its subconsulting partner, GEI Consultants, Inc., to conduct the quarterly groundwater monitoring and sampling tasks, evaluate water demand and available supply, identify threats to water supply, and assist the TG in preparation of the annual report. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 3 1.3 NCMA TG Mission Statement The NCMA TG developed the following Mission Statement to help guide ongoing initiatives and to capture the requirements outlined in the 2001 Groundwater Management Agreement, 2002 Settlement Agreement 2005 Stipulation, and 2008 Judgment: Preserve and enhance the sustainability of water supplies for the Northern Cities Area by:  Enhancing supply reliability  Protecting water quality  Maintaining cost-effective water supplies  Advancing the legacy of cooperative water resources management  Promoting conjunctive use 1.4 Coordination with Management Areas Since 1983, management of the NCMA has been based on cooperative efforts of the four NCMA agencies in continuing collaboration with the County, SLOFCWCD, and other local and state agencies. Specifically, the NCMA agencies have jointly monitored and managed their groundwater production and, in cooperation with the SLOFCWCD, invested in surface water supplies to reduce dependence on groundwater pumping and protect the groundwater resource. In addition to the efforts discussed in this 2019 Annual Report, cooperative management occurs through many means including communication by the NCMA agencies in their respective public meetings, participation in the SLOFCWCD Zone 36 Advisory Committee (related to the management and operation of Lopez Lake, which is described further in Section 4.1.1), and participation in the Water Resources Advisory Council (the County-wide advisory panel on water issues). The NCMA agencies are active participants in current and ongoing integrated regional water management efforts and participated in preparation and adoption of the 2007 San Luis Obispo County Integrated Regional Water Management Plan (2007 County IRWMP) as well as the 2014 update of the County IRWMP. The IRWMP promotes integrated regional water management to ensure sustainable water uses, reliable water supplies, better water quality, environmental stewardship, efficient urban development, protection of agriculture, and a strong economy. Since the 2008 Judgment, the NCMA TG has taken the lead in cooperative management of its management area. The NCMA TG has met monthly for many years and continued to do so throughout 2019. The TG also participates in the Santa Maria Groundwater Basin Management Area (SMGBMA) technical subcommittee, formed in 2009. The purpose of the SMGBMA technical subcommittee is to coordinate efforts among the three management areas (NCMA, NMMA, SMVMA) such as sharing data throughout the year and during preparation of the annual report, reviewing and commenting on technical work efforts of other management areas, standardizing monitoring protocols, considering projects and grant opportunities of joint interest and benefit, and sharing information and data among the managers of the three management areas. The outcomes of the motion that Arroyo Grande, Pismo Beach, and Grover Beach filed on September 29, 2015, include increased discussion and collaboration between the NCMA and NMMA. One of the initiatives was the formation of an NCMA-NMMA Management Coordination Committee that met several times in 2018 and 2019 to discuss items of mutual concern and develop strategies for addressing the concerns. Another area of increased mutual collaboration between the NCMA and NMMA was the formation in 2016 of a technical team to collaboratively develop a single data set of water level data points as part of preparing a consistent set of semiannual water level contour maps for the NCMA and NMMA. Those efforts continued into 6 Flood Control Zone 3 (Lopez Project) is operated by the County of San Luis Obispo Flood Control and Water Conservation District to operate Lopez Reservoir for municipal and agricultural water supplies. It was established to operate the Lopez water supply system and is a wholesale supplier. The contractors in Zone 3 include the communities of Oceano, Grover Beach, Pismo Beach, Arroyo Grande, and County Service Area 12 (including the Avila Beach area). FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 4 and throughout 2019 and resulted in the development of consistent water level contouring (and enhanced understanding of groundwater conditions) throughout the NCMA and NMMA. 1.5 Development of Monitoring Program The 2008 Judgment orders the stipulating parties to comply with all terms of the 2005 Stipulation. As specified in the Judgment and as outlined in the Monitoring Program for the Northern Cities Management Area (Todd Groundwater, Inc. [Todd], 2008) (NCMA Monitoring Program), the NCMA agencies are to conduct groundwater monitoring of wells in the NCMA. In accordance with requirements of the Judgment, the NCMA agencies collect and analyze data pertinent to water supply and demand, including the following:  Land and water uses in the NCMA portion of the SMGB  Sources of supply to meet those uses  Groundwater conditions (including water levels and water quality)  Amount and disposition of other sources of water supply in the NCMA The NCMA Monitoring Program requires that the NCMA agencies gather and compile pertinent information on a calendar-year basis; this is accomplished through data collected by NCMA agencies (including necessary field work), the SLOFCWCD, and by other public agencies. Periodic reports, such as Urban Water Management Plans (UWMPs) prepared by Arroyo Grande, Grover Beach, and Pismo Beach, provide information about demand, supply, and water supply facilities. Annual data are added to the comprehensive NCMA database and analyzed. Results of the data compilation and analysis for 2019 are documented and discussed in this 2019 Annual Report. As shown in Figure 1, the NCMA represents the northernmost portion of the SMGB as defined in the 2005 Stipulation and by DWR (2019; GSI, 2018). Adjoining the NCMA to the south and east is the NMMA; the SMVMA encompasses the remainder of the SMGB. Figure 2 shows the locations of the four NCMA agencies in the NCMA. 1.6 Groundwater Monitoring Network The NCMA Monitoring Program includes (1) compilation of groundwater elevation data from the County, (2) water quality and groundwater elevation monitoring data from the network of sentry and monitoring wells in the NCMA, (3) water quality data from the State Water Resources Control Board (SWRCB) Division of Drinking Water (DDW), and (4) groundwater elevation data from municipal pumping wells. Analysis of these data is summarized below in accordance with the NCMA Monitoring Program (Todd, 2008) and as modified as additional well data and data sources have become available over the years. Approximately 150 wells within the NCMA were monitored by the County at some time during the past few decades. The County currently monitors 50 wells on a semiannual basis, in April and October, within the NCMA. The County monitoring program includes four sentry well clusters (piezometers) along the coast, a four-well cluster in Oceano, and County Monitoring Well No. 3 (12N/35W-32C03) (County Monitoring Well No. 3 [32C03]) located on the eastern NCMA boundary between the NCMA and NMMA (Figure 3). The County monitors more than 125 additional wells in the NMMA portion of the SMGB within the County. Beginning in 2009, the NCMA agencies initiated a quarterly sentry well monitoring program to supplement the County’s semiannual schedule. To monitor overall changes in groundwater conditions, representative wells within the NCMA were selected for preparation of hydrographs and evaluation of water level changes. Wells were selected based on the following criteria: FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 5  The wells must be part of the County’s current monitoring program or part of a public agency’s regular monitoring program.  Detailed location information must be available.  Construction details of the wells must be available.  The locations of the wells should have a wide geographic distribution.  The historical record of water level data must be long and relatively complete. Many of the wells that have been used in the program are production wells that were not designed for monitoring purposes, or, in other words, are screened across various production zones. Moreover, many of the wells are active production wells or are located near active wells and are therefore potentially subject to localized pumping effects that result in measurements that are lower than the regionally representative water level. These effects are not always apparent at the time of measurement and data cannot easily be identified as representing static groundwater levels in specific zones (e.g., unconfined or deep confined to semi- confined). Therefore, data should be considered as a whole in developing a general representation of groundwater conditions. The “sentry” wells (32S/12E-24Bxx, 32S/13E-30Fxx, 32S/13E-30Nxx, and 12N/36W-36Lxx) are a critical element of the groundwater monitoring network and are designed to provide an early warning system to identify potential seawater intrusion in the aquifer (Figure 3). Each sentry well consists of a cluster of multiple wells that allows for the measurement of groundwater elevation and quality from discrete depths. Also shown in Figure 3 is the OCSD observation well cluster, a dedicated monitoring well cluster located just seaward of OCSD production wells 7 and 8, and County Monitoring Well No. 3 (32C03). Figure 4 shows the depth and well names of the sentry well clusters, the OCSD observation well cluster, and County Monitoring Well No. 3 (32C03). Traditionally, the wells were divided into three basic depth categories including shallow, intermediate, and deep to describe the relative depths of each monitoring well within the cluster. The basic depth categories do not necessarily describe the geologic unit and relative depth of the unit that the screened portion of the well monitors. More recently, however, it is becoming apparent that it is important to recognize and identify the geologic unit that each well monitors. The water level responses and water quality changes are quite different between the shallow alluvial unit (24B01, 30F01, and 30N01), the Paso Robles Formation (24B02, 30F02, 30N02, 30N03, 36L01, OCSD MW-Green, OCSD MW-Blue, and 32C03), and the deeper Careaga Sandstone (24B03, 30F03, 36L02, OCSD MW-Silver, and OCSD MW-Yellow). The significance of this level of differentiation will be studied more extensively in the future. Since the sentry well monitoring program began in 2009, 45 monitoring events have been conducted. These monitoring events include collection of synoptic groundwater elevation data and water quality samples for laboratory analysis. 1.7 Recent and Ongoing Strategic Initiatives 1.7.1 Strategic Plan An NCMA Strategic Plan was developed in 2014 to provide the NCMA TG with a mission statement to guide future initiatives, provide a framework for identifying and communicating water resource planning goals and objectives, and formalize a 10-year work plan for implementation of those efforts. Several key objectives were identified related to enhancing water supply reliability, improving water resource management, and increasing effective public outreach. Implementation of some of these efforts continued throughout 2019. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 6 Work began in 2019 to update the 2014 NCMA Strategic Plan. The Strategic Plan was developed over a series of strategic planning sessions and NCMA TG meetings. The purpose of the Strategic Plan is to provide the NCMA TG with the following:  A Mission Statement to guide future initiative  A framework for communicating water resource goals  A formalized Work Plan for the next 10 years Through the strategic planning process, the NCMA TG identified several key strategies to guide future efforts. These key strategies include the following:  Enhance groundwater management  Develop supplemental water supply  Improve understanding of the NCMA groundwater  Improve water management governance  Increase inter-agency coordination Several strategic initiatives were developed for each key strategy, and an extensive screening and objective ranking process was applied. Utilizing the ranked and grouped strategic initiatives, the NCMA TG is developing an implementation plan for the key strategies. The implementation plan will include for each initiative the key participants, the NCMA lead, an estimated budget, and an implementation time frame. 1.7.2 Central Coast Blue Central Coast Blue is a regional recycled water project that includes advanced treatment of water from the Pismo Beach and South San Luis Obispo County Sanitation District (SSLOCSD) wastewater treatment plants and injection of the highly treated effluent into the SMGB to reduce the risk of seawater intrusion and improve water supply sustainability for the region. Currently the water from both wastewater treatment plants is being treated and discharged to the ocean. Central Coast Blue will provide an opportunity to capture this lost water and use it to recharge the SMGB to create a drought proof, sustainable water supply for the community. Tasks related to the development of the project that were performed prior to and throughout 2019 include feasibility study analysis, preliminary design, pilot plant development and operation, funding appropriation, cost/benefit sharing analysis, groundwater modeling, and initial environmental review. The intent of Central Coast Blue is to enable Pismo Beach, partnering NCMA agencies and the SSLOCSD to construct an Advanced Treatment Facility (ATF) to produce Advanced Purified Water (APW) to augment its water supply through injection to recharge the aquifer and develop a seawater intrusion barrier to improve water supply reliability for the area. 1.7.3 Phase 1B Groundwater Model As part of Central Coast Blue planning and technical studies, a localized groundwater flow model (the Phase 1A model) was developed for the northern portion of the NCMA that evaluated the concept of injecting APW into the SMGB to increase aquifer recharge, improve water supply reliability, and help prevent future occurrences of seawater intrusion. Based on the results of the Phase 1A model and through funding by the SSLOCSD Supplemental Environmental Program, work was initiated in 2017 and continued through 2018 and 2019 for development of the Phase 1B groundwater flow model. The domain of the Phase 1B model covers the entire NCMA, NMMA, and the portion of the SMVMA north of the Santa Maria River. The purpose of the model is to evaluate additional groundwater injection and extraction scenarios to further support Central Coast Blue. The model has now been used to (1) more completely understand the groundwater conditions of the FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 7 NCMA portion of the SMGB, (2) understand the groundwater flow dynamics and components of the groundwater water balance of the aquifer, (3) identify the locations of the proposed injection wells, (4) quantify the amount of water that can be injected, (5) evaluate strategies for preventing seawater intrusion, and (6) develop estimates of the overall yield that the Central Coast Blue stakeholders will be able to receive from the project. This page intentionally left blank. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 9 SECTION 2: Basin Setting 2.1 Setting The northern portion of the NCMA is dominantly urban (residential/commercial). The Cienega Valley, a low- lying coastal stream and valley regime, is the area south of Arroyo Grande Creek in the central part of the area and is predominantly agricultural. The southern and southwestern portions of the area are composed of beach dunes and small lakes. That area is primarily managed by California Department of Parks and Recreation as a recreational area and a sensitive species habitat. 2.2 Precipitation Each year, climatological and hydrologic (stream flow) data for the NCMA are added to the NCMA database. Annual precipitation from 1950 to 2019 is presented in Figure 5. Historical rainfall data are compiled on a monthly basis for the following two stations:7  DWR California Irrigation Management Information System (CIMIS) Nipomo Station (No. 202) (Nipomo station) for 2006 to present  San Luis Obispo County-operated rain gauge (No. SLO 795) in Oceano for 2000 to present The locations of the two stations are shown in Figure 6. In recent years, it was noted that the CIMIS Nipomo station may have been recording irrigation overspray as precipitation and the precipitation data from the station may not be reliable. However, the evapotranspiration data is still considered reliable. For this reason and because the DRI station was discontinued in 2017, the County-operated gauge (No. SLO 795) was the sole source of precipitation data used in this 2019 Annual Report. Figure 5 is a composite graph combining data from the DRI and County stations and illustrating annual rainfall totals from available data from 1950 through 2019 (on a calendar-year basis). Annual average rainfall for the NCMA is approximately 15.7 inches. Monthly rainfall and evapotranspiration (ET) for 2019 as well as average monthly historical rainfall and ET are presented in Figure 7. During 2019, below-average rainfall occurred during 6 months and above-average rainfall occurred during the other 6 months. The total for the year was 20.0 inches, more than 4 inches above the average annual rainfall for the area. Figure 5 illustrates annual rainfall and shows several multi-year drought cycles (e.g., 6 years, 1984 through 1990) followed by cycles of above-average rainfall (e.g., 7 years, 1991 through 1998). With the exception of 2010, the period 2007 through 2015 (8 years) experienced below-average annual rainfall indicating a dry hydrologic period. This pattern continued into late 2016, when the hydrologic pattern appeared to have broken the serious drought that the area (and state) had experienced for the previous 5 years. Annual rainfall totals since 2016 have generally been above average (with the exception of 2018), as illustrated in Figure 5. 2.3 Evapotranspiration CIMIS maintains weather stations in locations throughout the state to provide real-time wind speed, humidity, and evapotranspiration data. The nearest CIMIS station to the NCMA is the Nipomo station (see Figure 6). The Nipomo station has gathered data since 2006. While this station may have been subject to irrigation overspray in recent years (noted in Section 2.2, Precipitation, above), the apparent irrigation overspray does not have a 7 The Desert Research Institute (DRI): Western Regional Climate Center Pismo Station (Coop ID: 046943) was discontinued in August of 2017. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 10 significant impact on the measurements used for calculating ET. The monthly ET data for the Nipomo station is shown in Figure 7 for 2019 and average conditions (over 10 years). The ET rate affects recharge potential of rainfall and the amount of outdoor water use (irrigation). 2.4 Geology and Hydrogeology The current understanding of the geologic framework and hydrogeologic setting is based on numerous previous investigations, particularly Woodring and Bramlette (1950), Worts (1951), Miller and Evenson (1966), DWR (1979, 2002), and Fugro (2015). The NCMA overlies the northwest portion of the SMGB. There are two principal aquifers in the NCMA portion of the SMGB. Groundwater pumped from the sedimentary deposits that make up the main municipal production aquifer underlying the NCMA is derived from the Paso Robles Formation and the underlying Careaga Sandstone. The Paso Robles Formation and Careaga Sandstone aquifers together are referred to as the deep aquifer system in this report. All municipal production in the NCMA is from the deep aquifer. The second principal aquifer is the alluvial aquifer, consisting of Quaternary-age alluvial sediments of Arroyo Grande Creek, Los Berros Creek, and the Cienega Valley. All agricultural groundwater production in the Cienega Valley is presumed to be extracted from the alluvial aquifer. Several faults either cross or form the boundary of the NCMA, as identified by DWR (2002), Pacific Gas & Electric (PG&E, 2014) (PG&E), and others. The Oceano Fault (USGS, 2006) trends northwest-southeast across the central portion of NCMA and has been extensively studied by PG&E (2014). Offshore, the Oceano Fault connects with the Hosgri and Shoreline fault systems several miles west of the coast. Onshore, the Oceano Fault consists of two mapped fault splays, including the main trace of the Oceano Fault as well as the Santa Maria River Fault, which diverges northward of the Oceano Fault through the Cienega Valley before trending into and across the Nipomo Mesa. It is unknown the extent to which the Oceano and Santa Maria River faults impede groundwater flow within the deep aquifer system materials. However, movement on the faults, as mapped by PG&E (2014), may suggest a possible impediment to flow with the Careaga Formation and possibly the Paso Robles Formation. PG&E (2014) suggests that the existence of the Santa Maria River Fault is “uncertain.” However, the water elevation contour maps of the NCMA (Figures 8 and 9, discussed in more detail in Section 3.4.1) may suggest that the Santa Maria River Fault plays a potential, but unknown, role in groundwater flow across the NCMA. The Wilmar Avenue Fault generally forms the northern boundary of the NCMA, apparently acting as a barrier to groundwater flow from the older consolidated materials north of the fault southward into the SMGB. There is no evidence, however, that the Wilmar Avenue Fault impedes alluvial flow in the Pismo Creek, Meadow Creek, or Arroyo Grande Creek alluvial valleys. 2.5 Groundwater Flow The groundwater system of the NCMA has several sources of recharge including precipitation, agricultural return flow, seepage from stream flow, and subsurface inflow from adjacent areas. In addition, some return flows occur from imported surface supply sources including Lopez Lake and the California State Water Project (SWP). Discharge in the region is dominated by groundwater production from pumping wells, but minor discharge certainly occurs through phreatophyte8 consumption and surface water outflow. Historically, 8 A phreatophyte is a deep-rooted plant that obtains a significant portion of the water that it needs from the water table. Phreatophytes are plants that are supplied with surface water or the upper portion of the near-surface water table and often have their roots constantly in touch with moisture. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 11 groundwater elevations in wells throughout the NCMA and resulting hydraulic gradients show that subsurface outflow discharge occurs westward from the groundwater basin to the ocean. This subsurface outflow is an important control to limit the potential of seawater intrusion. This westward gradient and direction of groundwater flow still is prevalent throughout the northern portion of NCMA, although there is some evidence recently that the westward gradient may have reversed in the area of Cienega Valley. The following descriptions of the boundary conditions of the NCMA are derived primarily from Todd (2007). The eastern boundary is coincident with the SLOFCWCD Zone 3 management boundary and with the northwestern boundary of the NMMA. Aquifer materials of similar formation, provenance, and characteristics are present across the majority of this boundary, which allows subsurface flow to occur between the NCMA and NMMA. The northern and northwestern boundary, established by the Court during the 2005 Stipulation, is coincident with the Wilmar Avenue Fault, which is located approximately along Highway 101 from Pismo Creek to the southeastern edge of the Arroyo Grande Valley. There is likely insignificant subsurface flow from the consolidated materials (primarily Pismo Formation) north of the Wilmar Avenue Fault across the boundary into the SMGB; however, basin inflow occurs within the underflow associated with alluvial valleys of Arroyo Grande and Pismo creeks. The southern boundary of the NCMA is an east-west line, roughly located along the trend of Black Lake Canyon and perpendicular to the coastline. Historically, it appears that groundwater flow is typically roughly parallel to the boundary. This suggests that little to no subsurface inflow occurs across this boundary. The western boundary of the NCMA follows the coastline from Pismo Creek in the north to Black Lake Canyon. Given the generally westward groundwater gradient in the area, this boundary is the site of subsurface outflow and is an important impediment to seawater intrusion. However, the boundary is susceptible to seawater intrusion if groundwater elevations onshore decline, such as may be occurring seasonally in the southeast portion of NCMA along the boundary with NMMA. This page intentionally left blank. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 13 SECTION 3: Groundwater Conditions 3.1 Groundwater Levels Groundwater elevation data are gathered from the network of wells throughout the NCMA to monitor the effects of groundwater use and recharge, and to monitor the threat of seawater intrusion. Over time, analysis of these groundwater elevation data has included development of groundwater surface contour maps, hydrographs, and an index of key sentry well water elevations. 3.1.1 Groundwater Level Contour Maps Contoured groundwater elevations for the spring (April 2019) and fall (October 2019) monitoring events, including data from the County monitoring program, are shown in Figures 8 and 9, respectively. From an increased understanding of the groundwater basin aquifer system and to be consistent with recent work completed for the Phase IB model, the groundwater elevation analysis was performed separately for each of the two principal aquifers. As described earlier (Section 2.4), the two principal aquifers are the deep aquifer, consisting of the Paso Robles Formation and the Careaga Sandstone and from which all municipal production is pumped, and the alluvial aquifer within the Cienega Valley, from which all agricultural production is pumped. Groundwater level contours for April 2019 are presented in Figure 8. Spring groundwater elevation contours in the deep aquifer system north of the Santa Maria River Fault show a westerly to southwesterly groundwater flow. The groundwater gradient and flow in the deep aquifer system in the southern portion of the NCMA are generally inferred on the basis of historical records, historical trends, and water level data from the NMMA farther east. This is due to a limited number of wells and water level data in the southernmost portion of the NCMA that is dominated by sensitive-species dunes and California State Parks land. Spring groundwater contours in the alluvial aquifer exhibit a gradient and flow direction that generally follows the alignment of Arroyo Grande Creek. The alluvial groundwater contours also indicate an inflow of groundwater from the Los Berros Creek drainage (Figure 8). Agricultural groundwater pumping results in seasonal drawdown of the alluvial aquifer in the Cienega Valley south and east of Arroyo Grande Creek. As shown on Figure 8, the April 2019 alluvial groundwater elevations in the Cienega Valley are in the range of less than 10 feet North American Vertical Datum 1988 (NAVD 88) to more than 30 feet NAVD 88. These data show an increase in alluvial groundwater elevations by as much as 13 feet from April 2018 to April 2019 (see Figure 8 from NCMA, 2018). During the recent drought, spring alluvial groundwater elevations showed a subdued pumping trough in the Cienega Valley, with groundwater elevations generally below sea level (NAVD 88) in the center of the depression. April 2019 groundwater elevations in the deep aquifer system main production zone along the coast ranged from 7.5 to 11.1 feet NAVD 88. A pumping depression occasionally formed in the deep aquifer system north and west of Arroyo Grande Creek in the area of concentrated municipal pumping. This depression occurred historically mostly in response to the recent drought. This pumping depression has not been observed since 2017, most likely due to a couple years of above-average rainfall, continued groundwater conservation efforts, and increased reliance on imported surface water. Groundwater elevation contours for October 2019 are presented in Figure 9. Fall groundwater contours in the deep aquifer system north of the Santa Maria River Fault show a generally west to southwesterly groundwater flow, similar to conditions in the spring, but with some minor pumping effects evident in the area of the municipal wells. Fall groundwater contours in the alluvial aquifer show pumping effects from agricultural groundwater production, including a pronounced pumping depression in the southeast portion of the Cienega FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 14 Valley (Figure 9). Similar to spring 2019, the fall alluvial groundwater contours indicate an inflow of groundwater from the Los Berros Creek drainage (Figure 9). The alluvial aquifer groundwater conditions in October 2019 shows a decline of approximately 8 to 28 feet from April 2019. These conditions are consistent with the pumping depressions observed historically during the fall within the Cienega Valley. The alluvial groundwater elevation in the pumping depression in October 2019, at (-) 17.6 feet NAVD 88, was 2 feet lower than was present in October 2018. October 2019 groundwater elevations in the deep aquifer system main production zone along the coast ranged from 6.1 to 8.3 feet NAVD 88. 3.1.2 Historical Water Level Trends Hydrographs of several water wells in the NCMA are presented in Figure 10. The hydrographs for wells 32D03 and 32D11 (Figure 10) are paired hydrographs for wells in the vicinity of the municipal wellfields. Depending on the duration of pumping of the municipal wells, historically water levels in these wells have been below levels in other areas of the NCMA for prolonged periods of time. The hydrographs show that, historically, groundwater elevations in these wells generally have been above mean sea level. In 2007 to 2009, when groundwater pumping was at its peak in comparison with pumping of the last 30 years and contributed to the apparent seawater intrusion event in the coastal wells in 2009, an area of lower groundwater elevations (a trough) beneath the active wellfield appeared. As illustrated in Figure 10, the water elevations of all the wells, including the paired wells 32D03 and 32D11, exhibited a steady decline from 2011 to 2016, during which time rainfall was below normal every year. In this period, groundwater elevations declined to near sea level or, in the case of well 33K03, to below sea level. By October 2016 the groundwater elevations in these wells were generally below the levels observed in 2009– 2010. However, in 2016 and 2017, all of the wells exhibited an overall increase in water levels except for the normal, seasonal decline during the summer. Water levels have remained approximately steady in all of the wells since 2017. The water level in well 33K03, located near the NCMA/NMMA boundary, is currently several feet above sea level (NAVD 88). 3.1.3 Sentry Wells and the Deep Well Index Regular monitoring of water elevations in clustered sentry wells located along the coast are an essential tool for tracking critical groundwater elevation changes at the coast. Groundwater elevations in these wells are monitored quarterly as part of the sentry well monitoring program. As shown by the hydrographs for the five sentry well clusters (Figure 11), the sentry wells provide a long history of groundwater elevations. Inspection of the recent data shown in Figure 11 compared with the historical record illustrates some noteworthy trends:  From 2013 until near the end of 2016, the water level trend of well 30N02, one of the wells that experienced elevated TDS and chloride levels in 2009–2010 (i.e. water quality degradation), looked quite similar to the water level trend of the well in 2007–2010, immediately before and during the period of incipient seawater intrusion. This trend was noteworthy and alarming. However, since the end of 2016 and continuing through 2019, the water level reversed the downward trend and now has water elevations seasonally fluctuating around 8 feet NAVD 88.  The decline in water levels from 2005 to 2016 in the Oceano Dunes wells (36L01 and 36L02) was also notable and potentially significant, particularly in well 36L01, which is screened across the Paso Robles FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 15 Formation. In 2016, both wells reached historical low-water elevations. However, since late 2016, both wells have started recovering to less-alarming levels. The deepest wells in the clusters, 24B03, 30F03, and 30N02, were previously identified as key wells to monitor for potential seawater intrusion and were suggested to reflect the net effect of changing groundwater recharge and discharge conditions in the primary production zone of the deep aquifer system. One of the thresholds to track the status and apparent health of the aquifer is to average the groundwater elevations from these three deep sentry wells to generate a single, representative index, called the Deep Well Index. Previous studies suggested a Deep Well Index value of 7.5 feet NAVD 88 as a minimum threshold, or trigger value, below which the aquifer is at risk for eastward migration of seawater and a subsequent threat of encroaching seawater intrusion. Historical variation of this index is represented by the average deep sentry well elevations in Figure 12. Inspection of the Deep Well Index in 2008–2009, prior to the period of water quality degradation in wells 30N03 and 30N02, the Deep Well Index dropped below the 7.5-foot trigger value and remained below that level for almost 2 years. It appears that prolonged levels below the threshold may be causing the degradation. Since the start of the recent drought in 2012, the Deep Well Index dropped several times below the threshold, but usually for only a few months at a time. In 2019, the Deep Well Index started the year above the trigger value with an index value of more than 9 feet in January. It continued to rise, reached a high more than 11 feet in late March, and then began to decline. The index value dropped down to the 7.5-foot trigger value briefly in late October and then immediately began to rise. The index value continued to rise throughout the end of the year and finished 2019 at about 10.5 feet NAVD 88 (Figure 12). Key wells, including 24B03, 30F03, 30N02, 36L01, 36L02, and 32C03, are instrumented with pressure transducers equipped with conductivity probes that periodically record water level, water temperature, and conductivity (Figures 13 through 18). It should be noted that transducer malfunctions have resulted in variable conductivity data in some of the wells during certain years, including 2015 and 2019. Malfunctioning transducers have been replaced and continue to be monitored in an ongoing effort to maintain a properly functioning monitoring network. Wells 24B03, 30F03, and 30N02 comprise the wells used to calculate the Deep Well Index. Wells 36L01 and 36L02 are adjacent to the coast. Well 32C03 is the easternmost well and adjacent to the boundary between the NCMA and NMMA. The following discusses 2019 water levels for these key wells:  Deep Well Index Wells: The Deep Well Index wells exhibited a pattern throughout 2019 that is consistent with previous years. The water levels in wells 24B03, 30F03, and 30N02 generally declined starting in March or April 2019 and continued to decline into October when they began to rise. Also consistent with patterns seen in previous years is the variability of aquifer response among the three wells. Well 24B03, the northernmost well and located in the North Beach Campground, maintains a relatively stable and moderated water level throughout the year and consistently sustains groundwater elevations higher than the Deep Well Index value. The water level in 24B03 mitigates the water levels in 30N02, which typically maintain levels consistently deeper than the Deep Well Index. Well 30F03 generally closely follows the Deep Well Index value.  Coastal Wells: The groundwater elevation in well 36L01, screened within the Paso Robles Formation, remained 4 to 10 feet above sea level (NAVD 88) throughout 2019 and remained stable within the relatively narrow historical range. The water level in well 36L02, which is screened within the Careaga Sandstone, illustrates a much greater seasonal fluctuation than is observed in 36L01. Similar to 2017 and 2018, the water elevation in 36L02 remained above sea level throughout 2019, in comparison with FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 16 2015 and 2016 when the water elevation in the well dropped below sea level in late September and remained below sea level into mid-October.  NCMA/NMMA Boundary: Well 32C03, which shows regular seasonal fluctuations, remained above sea level throughout all of 2017, 2018, and 2019, in contrast with the prior 4 years when the water level dropped below sea level in August and remained at a low elevation until early October. The groundwater elevation in 32C03 at the end of 2019 is the highest year-end elevation observed since the end of 2012. 3.2 Change in Groundwater in Storage The relative change of groundwater levels and associated change in groundwater in storage in the NCMA portion of the SMGB between April 2018 and April 2019 were estimated using a comparison of water level contour maps created for these periods. Separate estimates of change in groundwater in storage were computed for both the deep aquifer system and for the alluvial aquifer and then summed together to represent the total NCMA estimated change in groundwater in storage. The comparison of the April water levels was chosen to comply with DWR reporting requirements and SGMA. For each aquifer, the groundwater contour lines from each period were compared and the volumetric difference between the two periods were calculated. The results are presented in Figure 19 and Figure 20, which show contours of equal difference between April 2018 and April 2019 water elevations in the deep aquifer system and the alluvial aquifer, respectively. Figure 19 shows that deep aquifer system water elevations increased over a majority of the NCMA area, resulting in a net increase of groundwater in storage in the deep aquifer system. Figure 20 shows that alluvial aquifer water elevations increased everywhere within the extent of alluvium in the Cienega Valley, resulting in a net increase of groundwater in storage in the alluvial aquifer. From the change of water levels maps, a volumetric change in groundwater in storage estimate was made for each aquifer, based on assumed aquifer properties9, and then summed to represent the total NCMA estimated change in groundwater in storage. The net increase in groundwater levels in both aquifers represents a net increase of groundwater in storage from April 2018 to April 2019 of approximately 1,500 acre-feet (AF). 3.3 Water Quality Water is used in several ways in the NCMA and each use requires a certain minimum water quality. Because contaminants from seawater intrusion or from anthropogenic sources can potentially impact the quality of water in the aquifer, water quality is monitored at each of the sentry well locations in the NCMA and County Monitoring Well No. 3 (32C03). 3.3.1 Quarterly Groundwater Monitoring Quarterly groundwater monitoring events occurred in January, April, July, and October 2019. During each event, depths to groundwater were measured, and wells were sampled using procedures, sampling equipment, and in-field sample preservation protocol pursuant to ASTM International Standard D4448-01. The water quality data from these events and historical data from these wells are provided in Appendix A. 9 A storage coefficient of 0.02 was used for the deep aquifer system. This is representative of the Paso Robles Formation and Careaga Sandstone in the area, as documented in the SMGB Characterization Project (Fugro, 2015). A specific yield value for the alluvial aquifer of 0.09 was back calculated using the 2019 estimated change in alluvial groundwater in storage represented by the calculated agricultural demand (Section 4.2.1) and an alluvial groundwater elevation change map representing the total volume change that occurred between April 2019 and October 2019. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 17 Graphs of historical chloride and total dissolved solids (TDS) concentrations over time are presented in Figures 21 and 22, respectively, to monitor for trends that may aid in the detection of impending seawater intrusion. The historical water quality data show that concentration levels of chlorides and TDS, as well as other constituents, have remained relatively stable within a very narrow historical range since 2009. Improved management of municipal groundwater use, because of an overall reduction in pumping since 2009, has likely contributed to the past several years of relatively stable groundwater quality. 3.3.2 Analytical Results Summary Analytical results of key water quality data, including chloride, TDS, and sodium, were generally consistent with historical concentrations and observed ranges of constituent concentrations during 2019. In general, no water quality results were observed that are a cause of concern. Figure 23 is a Piper diagram, one of several means of graphically representing water quality. There appear to be three separate water quality types found in the monitoring wells: 1. The Pier Avenue deep well (30N02), screened in the Paso Robles Formation from 175 to 255 feet bgs, and Oceano Dunes intermediate well (36L01), screened in the Paso Robles Formation from 227 to 237 feet bgs, are screened in the same production zone. This is despite their different nomenclature as “deep” compared with “intermediate” wells. Relative to the other wells in the area, these two wells are high in sulfates and have calcium-magnesium-sulfate-rich water. Both wells are relatively low in chloride. This is significant because this zone, and well 30N02, was the site of an apparent seawater intrusion event in 2009–2010. 2. The County Monitoring Well No. 3 (32C03), screened from 90 to 170 feet bgs, in the Paso Robles Formation, has an apparent water quality that is different than any of the other wells in the area. It is relatively high in sodium, chloride, and potassium. Its location in the right quadrant of the diamond- shaped part of the Piper diagram (Figure 23) commonly characterizes a sodium-chloride-rich groundwater representative of marine or deep ancient groundwater, even though it is a relatively shallow well and screened within the Paso Robles Formation, a Plio-Pleistocene-age alluvial deposit. Although its overall water quality signature is quite different from seawater, it is more closely representative of seawater than any of the other wells in the area. 3. All of the other wells in the monitoring network fall into the third category of groundwater water quality. These wells are all generally a calcium-bicarbonate groundwater that is commonly associated with shallow groundwater. This grouping of water quality represents groundwater from wells that are screened in both the Paso Robles Formation and the Careaga sandstone (wells 24B03, 30F03, and 36L02 are screened in the Careaga sandstone; the others are screened in the Paso Robles Formation). None of the water quality results from monitoring wells throughout 2019 indicate an incipient episode or immediate threat of seawater intrusion. Since the decline of TDS, sodium, and chloride concentrations following the 2009–2010 seasons, it is also clear that the location and inland extent of the seawater-fresh water interface is not known, except for the apparent indication that it was detected in well 30N02, 30N03, and OCSD MW-Blue, all of which are screened in the Paso Robles Formation. No indications of seawater intrusion have been observed in wells screened in the underlying Careaga sandstone. At this time, without additional offshore data, the location of the interface or mixing zone is not known and will not be known unless and until it intercepts a monitoring well. This page intentionally left blank. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 19 SECTION 4: Water Supply and Production/Delivery 4.1 Water Supply The NCMA water supply consists of three major sources including Lopez Lake, the SWP, and groundwater. Each source of supply has a defined delivery volume that varies from year to year. 4.1.1 Lopez Lake The Lopez Project consists of Lopez Lake, Lopez Dam, Lopez Terminal Reservoir, and Lopez Water Treatment Plant and is operated by SLOFCWCD Zone 3. SLOFCWCD Zone 3 provides treated water directly to the Zone 3 contractors and releases water to Arroyo Grande Creek for habitat conservation and agricultural use. The Zone 3 contractors include Arroyo Grande, Grover Beach, Pismo Beach, Oceano CSD, and CSA 12, which serves Avila Beach and is not in the NCMA. The operational safe yield of Lopez Lake is 8,730 acre-feet per year (AFY), which reflects the amount of sustainable water supply during a drought of defined severity. Of this, 4,530 AFY is apportioned to the contractors and 4,200 AFY is reserved for downstream releases to maintain flows in Arroyo Grande Creek and provide groundwater recharge. The 2019 SLOFCWCD Zone 3 allocations are shown in Table 2. Table 2. Lopez Lake (SLOFCWCD Zone 3 Contractors) Water Allocations (AFY) Contractor Normal Water Allocation, (AFY) City of Arroyo Grande 2,290 City of Grover Beach 800 City of Pismo Beach 892 Oceano CSD 303 CSA 12 (not in NCMA) 245 Total 4,530 Downstream Releases 4,200 Safe Yield of Lopez Lake 8,730 Notes AFY = acre-feet per year, CSA = County Service Area, CSD = Community Services District, SLOFCWCD = County of San Luis Obispo Flood Control & Water Conservation District, NCMA = Northern Cities Management Area In December 2014, SLOFCWCD Zone 3 adopted the Low Reservoir Response Plan (LRRP). The LRRP establishes actions that SLOFCWCD Zone 3 can take when the amount of water in storage in the reservoir drops below 20,000 AF, provided that the SLOFCWCD Board of Supervisors declares a drought emergency. The purpose of the LRRP is to limit downstream releases and municipal diversions from Lopez Lake to preserve water within the reservoir, above the minimum pool, for a minimum of 3 to 4 years under drought conditions. The reduction strategies for the LRRP are tied to the amount of water in the reservoir. As the amount of water in the reservoir drops below the triggers (20,000; 15,000; 10,000; 5,000; and 4,000 AF), the hydrologic conditions are reviewed, and adaptive management is used to meet the LRRP objectives. The municipal diversions are to be reduced according to the strategies shown in Table 3. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 20 Table 3. Lopez Lake Municipal Diversion LRRP Reduction Strategy Amount of Water in Storage (AF) Municipal Diversion Reduction AFY 20,000 0% 4,530 15,000 10% 4,077 10,000 20% 3,624 5,000 35% 2,941 4,000 100% 0 Notes AF= acre-feet, AFY = acre-feet per year The mandatory actions after the LRRP is enacted include (1) reductions in entitlement water deliveries; (2) reductions in downstream releases; (3) no new allocations of surplus water from unreleased downstream releases; and (4) extension of time that agencies can take delivery of existing unused water throughout the duration of the drought emergency, subject to evaporation losses if the water is not used in the year of original allocation. Included in the LRRP is an adaptive management provision that allows modification of the terms of the LRRP to match the initially prescribed reductions based on actual hydrologic conditions. The downstream releases are to be reduced according to the strategies described in Table 4. The release strategies represent the maximum amount of water that can be released. The SLOFCWCD Zone 3 controls the timing of the reduced releases to meet the needs of the agricultural stakeholders and to address environmental requirements. Table 4. Lopez Lake Downstream Release LRRP Reduction Strategy Amount of Water in Storage (AF) Downstream Release Reduction AFY 20,000 9.5% 3,800 15,000 9.5% 3,800 10,000 75.6% 1,026 5,000 92.9% 300 4,000 100% 0 Notes AF= acre-feet, AFY = acre-feet per year The LRRP was put into effect on April 1, 2015. Throughout 2015 and all of 2016, SLOFCWCD Zone 3 operated Lopez Lake pursuant to the 15,000 AF diversion reduction trigger that required a 10 percent reduction in municipal diversions. The 10,000 AF trigger requiring a 20 percent reduction was avoided because agencies enacted mandatory water conservation measures and utilized other sources of water including some minimal rainfall and SWP water. Lopez Lake recovered from a low of 11,000 AF in storage to a peak of more than 30,000 AF in May 2017, ending with approximately 25,000 AF at the start of 2018 because of the relatively heavy rainfall year of late 2016 and early 2017. Although contractually the LRRP is no longer in effect when both triggers are rescinded (Board of Supervisors declaration of water emergency and reservoir levels drop below 20,000 AF), the FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 21 SLOFCWCD Zone 3 agencies resolved to keep the LRRP in effect until there is clear evidence that the drought was over. Because the reservoir volume was above 20,000 AF, no mandatory reductions in municipal deliveries were required in 2017 or 2018. In 2019, the reservoir level stayed above 20,000 AF all year, reaching a high of 29,405 AF in May 2019. As a result, there were no mandatory reductions in municipal deliveries in 2019. The status of the reservoir and management actions related to the LRRP will be monitored throughout 2020 and adjusted accordingly based on winter 2020 rainfall and storage in Lopez Lake. Total discharge from Lopez Lake in 2019 was 7,099 AF, of which 4,385 AF were delivered to NCMA contractors, 69 AF were delivered to CSA 12, and 2,645 AF were released downstream to maintain flow in Arroyo Grande Creek (Table 5). When management of releases results in a portion of the 4,200 AFY remaining in the reservoir, or the contractors do not use their full entitlement for the year, the water is offered to the contractors as surplus water. Surplus water deliveries to the NCMA agencies in 2019 equaled 384 AF (Table 5). Table 5. Lopez Lake 2019 Deliveries Contractor 2019 Allocation Usage (AF) 2019 Surplus Usage (AF) 2019 Total Lopez Lake Water Delivery (AF) City of Arroyo Grande 2,034 0 2,034 City of Grover Beach 772 9 781 City of Pismo Beach 892 156 1,048 Oceano CSD 303 219 522 Total NCMA 2019 Usage 4,001 384 4,385 CSA 12 (not in NCMA) 69 0 69 Downstream Releases 2,645 -- 2,645 Total 2019 Lopez Lake Deliveries 6,715 384 7,099 Notes AF= acre-feet, CSD = Community Services District, NCMA = Northern Cities Management Area Source: SLOFCWCD Zone 3 Monthly Operations Reports 4.1.2 State Water Project Pismo Beach and OCSD have contracts with SLOFCWCD Zone 3 to receive water from the SWP. The SLOFCWCD serves as the SWP contractor and provides imported water to local retailers through the SWP Coastal Branch (Coastal Branch) pipeline. Pismo Beach and OCSD, as subcontractors to SLOFCWCD, have annual contractual water delivery allocations, commonly referred to as Table A water, of 1,24010 AFY and 750 AFY, respectively (Table 6). In addition to its Table A allocation, Pismo Beach holds 1,240 AFY of additional allocation known as “drought buffer” and OCSD holds an additional allocation of 750 AFY of drought buffer. The additional drought 10 140 AF of which is owned by private parties. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 22 buffer allocation held by the agencies is available to augment the SWP water supply when the SWP annual allocation, i.e., percentage of SWP water available, is less than 100 percent. The additional allocations also increase each agency’s water held in storage. In any given year, however, Pismo Beach’s and OCSD’s total SWP deliveries cannot exceed 1,240 AF and 750 AF, respectively. Table 6. 2019 NCMA SWP Deliveries Agency Table A Allocation, AFY Drought Buffer, AFY 2019 Delivery, AF City of Arroyo Grande -- -- -- City of Grover Beach -- -- -- City of Pismo Beach1 1,100 1,240 556 Oceano CSD 750 750 11 Total Allocation/Usage, AFY 1,850 1,990 567 Notes: 1 Pismo Beach contracts for 1,240 AF of Table A water from the SWP, but 140 AF are owned by private parties AF=acre feet, AFY= acre-feet per year, CSD = Community Services District, NCMA = Northern Cities Management Area The SWP annual allocation for all contractors throughout California (including SLOFCWCD, Pismo Beach and Oceano CSD) for 2019 was initially set on November 30, 2018 at 10 percent of the Table A contractual allocation. The 2019 SWP allocation was then increased three times in 2019: to 15 percent on January 25; to 35 percent on February 20; and to 70 percent on March 20. SWP contractors have the opportunity to store undelivered Table A water at the SWP facility called San Luis Reservoir (limitations exist on the amount that can be stored in any one year). This stored water is called “carryover water” and can be delivered in subsequent years but total annual deliveries cannot exceed their Table A allocation due to capacity restrictions in the Coastal Branch. In addition, carryover water can be lost (or “spilled”) if its storage interferes with storage of current year SWP water for project needs. For 2020, the initial allocation of the SWP contractors was set at 10 percent of Table A contractual allocation amounts on December 2, 2019 and increased to 15 percent on January 24, 2020. The SWP supply has the potential to be affected by drought and environmental issues, particularly because of the endangered Delta smelt in the Delta. However, OCSD and Pismo Beach, as well as the other SLOFCWCD sub-contractors have not been negatively affected to date by reduced SWP supplies because of the SLOFCWCD’s large amount of unsubscribed Table A allocation which has been used to fulfill subcontractors’ requests, even in dry years. Therefore, even when SWP supplies are decreased, the SLOFCWCD’s unsubscribed allocation and any carryover water in San Luis Reservoir provides a buffer so that contracted volumes to subcontractors, such as OCSD and Pismo Beach, still may be provided in full. During 2019, Pismo Beach took delivery of 556 AF of SWP water and OCSD took delivery of 11 AF of SWP water. 4.1.3 Groundwater The 2008 Judgment and the 2002 Settlement Agreement govern the use of groundwater in the NCMA and establish that groundwater will continue to be allotted and independently managed by the NCMA agencies, NCMA overlying owners, and SLOFCWCD (Northern Parties). Each of the NCMA agencies has the capability to extract groundwater from municipal water supply wells located in the central and northern portions of the FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 23 NCMA (Figure 24). Groundwater also satisfies agricultural irrigation and rural domestic use throughout the NCMA. The calculated, consensus safe yield value of 9,500 AFY for the NCMA portion of the SMGB was included in the 2002 Settlement Agreement through affirmation of the 2001 Groundwater Management Agreement among the NCMA agencies. The basis of the safe yield was established in 1982 by a Technical Advisory Committee, consisting of representatives from Arroyo Grande, Grover Beach, Pismo Beach, OCSD, Avila Beach Community Water District, Port San Luis Harbor District, the Farm Bureau, and the County to deal with a safe yield allocation strategy and agreement not to exceed the safe yield of what was then called the Arroyo Grande Groundwater Basin. The basis for the committee's analysis was DWR (1979). The Technical Advisory Committee concluded that the safe yield was 9,500 AFY. These findings and the allocation of the safe yield then were incorporated into a voluntary groundwater management plan (1983 Gentlemen’s Agreement) and were further formalized in the 2002 Settlement Agreement and the 2005 Stipulation. According to Todd (2007), the safe yield allotment for agricultural irrigation is significantly higher than the actual agricultural irrigation demand and the calculated amount for subsurface outflow is unreasonably low. Todd (2007) recognized that maintaining sufficient subsurface outflow to the coast and preservation of a westward groundwater gradient are essential to preventing seawater intrusion. A regional outflow of 3,000 AFY was estimated as a reasonable approximation although the minimum subsurface outflow necessary to prevent seawater intrusion is unknown. The 9.500 safe yield provides allotments for agricultural irrigation of 5,300 AFY, subsurface outflow to the ocean of 200 AFY, and urban use of 4,000 AFY. The volume of the allotment for urban use was subdivided as follows:  Arroyo Grande: 1,202 AFY  Grover Beach: 1,198 AFY  Pismo Beach: 700 AFY  OCSD: 900 AFY The 2001 Groundwater Management Agreement provides that groundwater allotments of each of the urban agencies can be increased when land within the corporate boundaries is converted from agricultural use to urban use, which is referred to as an agricultural conversion credit. Agricultural conversion credits equal to 121 AFY and 209 AFY were developed in 2011 for Arroyo Grande and Grover Beach, respectively. These agricultural credits were unchanged during 2019. Total groundwater production in the NCMA, including agricultural irrigation and rural uses, is shown in Table 7 (descriptions of agricultural irrigation applied water and rural use estimation are provided in Sections 4.2.1 and 4.2.2, respectively). Total estimated groundwater pumpage in the NCMA in 2019 from the SMGB was 3,320 AF. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 24 Table 7. NCMA Groundwater Allotment and Production from Santa Maria Groundwater Basin, 2019 Total Allotment/Use Groundwater Allotment + Ag Conversion Credit (AF) 2019 Groundwater Use from SMGB (AF) Total Urban Groundwater Allotment / Use 4,000 + 330 = 4,330 684 Total NCMA Groundwater Allotment / Use 9,500 3,320 Notes: AF= acre-feet, Ag = agriculture, SMGB = Santa Maria Groundwater Basin, CSD = Community Services District, 4.1.4 Developed Water The 2005 Stipulation states that “developed water” is “groundwater derived from human intervention” and states that this includes infiltration from the following sources: “Lopez Lake water, return flow, and recharge resulting from storm water percolation ponds.” Return flow results from deep percolation of water used in irrigation that is in excess of a plant’s requirements. Return flows have not been estimated recently but would be considered part of the groundwater basin inflow. In 2008, Arroyo Grande, Grover Beach, and Pismo Beach prepared stormwater management plans. To control stormwater runoff and to increase groundwater recharge, each city now requires that new development construct onsite retention or detention ponds. As these new ponds or basins are constructed, the increase in groundwater recharge could result in recognition of substantial augmentation of basin yield and provision of recharge credits to one or more of the NCMA agencies (Todd, 2007). Thus, a re-evaluation of estimated stormwater recharge is warranted as new recharge facilities are installed and as additional information on flow rates, pond size, infiltration rates, and tributary watershed area becomes available. Pursuant to the 2001 Groundwater Management Agreement, calculation of recharge credits would be based on a mutually accepted methodology to evaluate the amount of recharge, including quantification of factors such as Lopez Lake and SWP recharge, stormwater runoff amounts, determination of effective recharge under various conditions, and methods to document actual recharge to developed aquifers. 4.1.5 Other Supplies Arroyo Grande owns three water wells that are located outside the SMGB and pump groundwater from the Pismo Formation, which is the geologic bedrock unit in the area. Two of the wells are pumped by the City and used for municipal consumption; the third well is likely to be used in the future. There is no established allocation that limits the volume of groundwater that Arroyo Grande can pump from these wells, but for planning purposes the City assumes that they have the ability to pump up to 160 AFY for municipal use. The volume that Arroyo Grande pumps from these wells varies from year to year and is included in summary totals for urban water use, but the volume is not included in the summary totals for SMGB production. 4.1.6 Total Water Supply Availability The baseline, or full allocation, water supply available to the NCMA agencies is summarized in Table 8. The baseline water supplies include 100 percent Lopez Lake allocation, SMGB groundwater allotments, FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 25 agricultural credits, and 100 percent delivery of SWP allocations. This baseline water supply does not include Lopez Lake surplus or SWP carryover, because these supplies vary from year to year and are not always available. The category “Other Supplies” includes groundwater pumped from outside the NCMA boundaries (outside the SMGB). The baseline supply for the NCMA agencies totals 10,625 AFY. Table 8. Baseline (Full Allotment) Available Urban Water Supplies (AFY) Agency Lopez Lake SWP Allocation (at 100%) Groundwater Allotment Ag Credit Other Supplies Total City of Arroyo Grande 2,290 0 1,202 121 160 3,773 City of Grover Beach 800 0 1,198 209 0 2,207 City of Pismo Beach 892 1,100 700 0 0 2,692 Oceano CSD 303 750 900 0 0 1,953 Total 4,285 1,850 4,000 330 160 10,625 Notes: AFY= acre-feet per year, Ag = agriculture, CSD = Community Services District, SWP = State Water Project Table 9 summarizes the available water supply to the NCMA agencies in 2019, including Lopez Lake, Lopez Lake carryover (surplus) water, the 2019 SWP 70 percent Table A delivery schedule, and the available SWP carryover water. The total available water supply is a compilation of all components of each agency’s portfolio. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 26 Table 9. 2019 Available Urban Water Supply, (AF) Agency Lopez Lake Allocation Lopez Lake Surplus 2019 SWP Allocation with Drought Buffer (at 70% Delivery) 2019 SWP Carryover Ground-water Allotment Ag Credit Other Supplies Total (2019) Arroyo Grande 2,290 378 0 0 1,202 121 160 4,151 Grover Beach 800 132 0 0 1,198 209 0 2,339 Pismo Beach 892 147 1,6381 1,8602 700 0 0 2,9791 Oceano CSD 303 50 1,0501 1,1252 900 0 0 2,0031 Total 4,285 707 2,688 2,985 4,000 330 160 11,472 Notes: 1 In any given year, Pismo Beach’s total SWP deliveries cannot exceed 1,240 AF and OCSD’s deliveries cannot exceed 750 AF. In years when the Table A SWP allocation, plus drought buffer, plus carryover exceed 1,240 AF for Pismo Beach and 750 AF for OCSD, the total available SWP supply is capped at 1,240 AF or 750 AF for Pismo Beach and OCSD, respectively. 2 Based on personal communication with Jill Ogren, SLOFCWCD, on January 29, 2020. AF = acre-feet, CSD = Community Services District, SWP = State Water Project FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 27 4.2 Water Use Water use refers to the total amount of water used to satisfy the needs of all water user groups. In the NCMA, water use predominantly serves urban production and agricultural applied water; a relatively small component of rural domestic use, including small community water systems; and domestic, recreational, and agriculture- related businesses. 4.2.1 Agricultural Water Supply Requirements For the 2019 Annual Report, the applied irrigation demand estimations were updated using the 2015 Integrated Water Flow Model (IWFM) Demand Calculator (IDC). The IDC is a stand-alone program that simulates land surface and root zone flow processes, and, importantly for this report, the agricultural water supply requirements for each crop type. IDC applies user-specified soil, weather, and land-use data to estimate and track the soil moisture balances. More specifically, available water within the root zone is tracked for each of the crops to simulate when irrigation events take place based on crop requirements and cultural irrigation practices. The data used in the IDC program for NCMA are described below along with their respective sources. Data Used in the IDC  Land-use Information. The San Luis Obispo County Agricultural Commissioner’s Office (ACO) compiles an annual estimate of irrigated acres in the County. A view displaying the irrigated agricultural lands within NCMA for 2019 is shown in Figure 25. The 2019 survey indicates a total of 1,463 acres of irrigated agriculture in the NCMA consisting predominantly of rotational crops. Table 10 lists the crop types and acreages found in the NCMA that were used in the IDC program.  Climate Data. 2019 weather data from the SLOFCWCD rain gauge in Oceano and the CIMIS Nipomo Station were used for precipitation and data related to reference ET values, respectively. The data needed to calculate reference ET values include solar radiation, humidity, air temperature, and wind speed. Both weather stations are shown in Figure 6.  ET Values by Crop Category. The DWR Consumptive Use Program (CUP) was used to estimate potential ET values based on specific annual climate data and crop type. The CUP used monthly climate data from the closest CIMIS station (Nipomo station) and includes crop coefficients to calculate ET values for the irrigated crop categories. Assumptions used in the analysis include the following:  As the NCMA is located near the coast, agricultural practices are influenced significantly by the marine layer, a mass of air that may be of lower temperature and have higher humidity than air over inland areas. As seen in Figure 6, the Nipomo CIMIS station used for climatological data in both the CUP and IDC is located farther inland than the easternmost boundary of NCMA and the recorded weather data does not fully account for the cooling and moisture effects of the marine layer.  Use of an unadjusted calculated ET value results in a higher ET value than that actually taking place in the NCMA. Studies11 have identified that ET values within the influence of the marine layer can be as much as 20 to 25 percent lower than ET values for the same crop located just outside of the marine layer influence. The distance the marine layer extends inland can vary from less than one-half mile to as much as 4 to 5 11 Irrigation Training and Research Center <http://www.itrc.org/etdata/etmain.htm> (Cal Poly, 2019) provides typical-year (1997 Hydrology) ET values using various irrigation methods for Zone 3, the coastal outside marine layer, and Zone 1, the marine layer. The computed percentage reduction in ET to Zone 3 values range from 11 percent for rotational crops (small vegetables) to 19 percent for strawberries. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 28 miles, depending on land topography. Low-lying areas have a higher frequency of marine layer coverage and for longer periods throughout the day.  The NCMA is considered a low-lying area with boundaries extending between 2 and 5 miles inland. Recognizing that not all the crops would be affected by the marine layer, but accounting for the cooling influence over some of the area, monthly ET values calculated based on the CIMIS Nipomo Station data were adjusted lower by 12 percent12 and are shown in Table 10.  Soil Data. The Natural Resources Conservation Service Soil Survey Geographic Database) was used to collect soil parameters in the NCMA for use in the IDC. The soil properties used include saturated hydraulic conductivity, porosity, and the runoff curve numbers. The field capacity and wilting points were developed on the basis of the described soil textures (i.e., sand, loam, sandy clay, etc.) and industry standards. The IDC relies on soil properties for estimating water storage, deep percolation, and runoff; all of which lead to a refined estimation of applied water. Table 10. 2019 NCMA Crop Acreages and Calculated Evapotranspiration Crop Type Acreage 2019 Potential ET1 (AF/Acre) Rotational Crops 1,284 1.92 Strawberry 155 1.0 Avocados 24 2.0 Notes: 1 See ET Values by Crop Category, in text section above. 2 Rotational crop ET is based on a rotation of two to three crops. ET = evapotranspiration, AF = acre-feet Model Development and Computations The IDC is written in FORTRAN 2003 using an object-oriented programming approach. The program consists of three main components: (1) input data files, (2) output data files, and (3) the numerical engine that reads data from input files, computes applied water demands, routes water through the root zone, and exports the results to the output files. The flow terms used in the root zone routing are defined in Table 11 and shown in the graphic below the table. Drainage from ponded areas (Dr) was not applicable because there are no ponded crops in the NCMA; data related to generic soil moisture (G) were not available. 12 A single ET reduction value is used based on changing location and rotation of crop types relative to influence of marine layer. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 29 Table 11. Flow Terms Used in Root Zone Routing for IDC Model Abbreviation Term Notes P Precipitation User Specified ET Evapotranspiration IDC Output G Generic source of moisture (i.e., fog, dew) Data Not Available Aw Applied water IDC Output Dr Outflow resulting from drainage of ponded areas (e.g., rice, refuges) Not Applicable RP Direct runoff IDC Output Rf Return flow User Specified (fraction of applied water) U Re-used portion of return flow User Specified (fraction of return flow) D Deep percolation IDC Output Notes: Integrated Water Flow Model (IWFM) Demand Calculator (IDC) (California Department of Water Resources Bay Delta Office, 2016) Source: California DWR (2016). All extracted geospatial information was applied to a computational grid within the IDC framework to simulate the root zone moisture for 2019 in NCMA agricultural areas. The IDC provides the total water supply requirement for each crop category met through rainfall and applied irrigation water in agricultural areas based on user-defined parameters for crop evaporation and transpiration requirements, climate conditions, soil properties, and agricultural management practices. Sources for data related to crop demands (i.e., potential ET), climate conditions, and soil properties are discussed above. The computations for actual crop ET (versus potential ET), applied water, and deep percolation are described below. The potential ET is the amount of water a given crop will consume through evaporation and/or transpiration under ideal conditions (i.e., fully irrigated 100 percent of the time). Fully irrigated conditions mean that the FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 30 water required to meet all crop demands is available. Water is available to the crops when the soil moisture content within the root zone is between the field capacity and the wilting point. When the soil moisture is above the field capacity, some water will go to runoff and/or deep percolation; when the soil moisture is below the wilting point, it is contained in the smallest pore spaces within the root zone and considered unavailable to the crops. The difference between the field capacity and the wilting point is the total available water (TAW). In IDC, when the soil moisture is above one-half of the TAW, the crop ET will be equal to the potential ET. However, if the soil moisture is below one-half of the TAW, the plants will experience water stress and ET decreases linearly until it reaches zero at the wilting point. This method of simulating water stress is similar to the method described in Allen et al. (1998) to compute non-standard crop ET under water stress conditions. The IDC monitors the moisture content within the root zone and applies water by triggering an irrigation event when the calculated soil moisture is below a user-specified minimum allowable soil moisture requirement. For this application of the IDC, the minimum soil moisture requirement was set to trigger an irrigation event when the soil moisture fell below one-half the TAW to limit water stress in the crops. During an irrigation event, the soil moisture content in the root zone reaches field capacity. If precipitation occurs, soil moisture may increase above field capacity, generating deep percolation, and potentially runoff, both depending on the quantity and temporal distribution of rainfall. Deep percolation is the vertical movement of water through the soil column flowing out of the root zone resulting in the potential for groundwater recharge. The IDC applies the van Genuchten-Mualem equation (Mualem, 1976; van Genuchten, 1985) to compute deep percolation using the user-defined saturated hydraulic conductivity and pore size distribution. Results The total agricultural water supply requirements for 2019 was estimated to be 2,506 AF, and the effective precipitation (i.e., rainwater used by the crop) was 606 AF. Figure 26 illustrates the estimated crop water requirement in the NCMA as calculated by the IDC and displays the three identified crop types and their estimated monthly applied water. The rotational crops have the highest water supply requirements because they cover the greatest area (see Figure 25) and have the greatest annual ET (Table 12). The estimated agricultural water supply requirement of 2,506 AF in 2019 is comparable to the estimated 2,651 AF in 2018; 2,536 AF in 2017; 2,494 AF in 2016; 3,008 AF in 2015; and 2,955 AF in 2014. In 2014, the methodology of estimating agricultural water requirements was modified from an estimated applied rate based on hydrologic conditions to the IWFM IDC methodology described here. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 31 Table 12. 2019 IDC Model Results of Monthly Applied Water Monthly Applied Water (AF) Annual Total (AF) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Rotational Crops 0 0 0 131 362 143 448 392 323 275 254 0 2,329 Strawberry 0 0 0 0 0 14 21 33 32 30 21 0 152 Avocados 1 0 0 0 0 0 5 6 5 4 4 0 25 Total 1 0 0 131 362 157 474 431 361 309 279 0 2,506 Monthly Precipitation (inches) Annual Total (inches) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Precipitation 4.7 4.8 3.2 0.2 1.4 0 0 0 0 0 2.4 3.4 20.1 Monthly Unit Water Demand (AF/Acre) Annual Total (AF/Acre) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Rotational Crops 0 0 0 0.1 0.28 0.11 0.35 0.31 0.25 0.21 0.2 0 1.81 Strawberry 0 0 0 0 0 0.09 0.13 0.22 0.21 0.19 0.14 0 0.98 Avocados 0.03 0 0 0 0 0 0.21 0.27 0.2 0.18 0.16 0 1.05 Area Weighted Average 0.00 0.00 0.00 0.09 0.25 0.11 0.32 0.30 0.25 0.21 0.19 0.00 1.71 Notes: AF = acre-feet, AF/Acre = acre-feet per acre FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 32 4.2.2 Rural Use In the NCMA, rural water use refers to groundwater pumping not designated as urban use or agricultural irrigation applied water and includes small community water systems, individual domestic water systems, recreational uses, and agriculture-related business systems. Small community water systems using groundwater in the NCMA were identified initially through a review of a list of water purveyors compiled in the 2007 County IRWMP. These include the Halcyon Water System, Ken Mar Gardens, and Pacific Dunes RV Resort. The Halcyon Water System serves 35 homes in the community of Halcyon, and Ken Mar Gardens provides water supply to 48 mobile homes on South Halcyon Road. The Pacific Dunes RV Resort, with 215 RV sites, provides water supply to a largely transitory population and a nearby riding stable. In addition, an inspection of aerial photographs of rural areas within NCMA has identified about 25 homes and businesses that are served by private wells. Two mobile home communities, Grande Mobile and Halcyon Estates, are served by OCSD through the distribution system of Arroyo Grande. Therefore, the production summary of OCSD includes these two communities. Based on prior reports, it is assumed that the number of private wells is negligible within the service areas of the NCMA agencies. The Pismo Beach Golf Course (Le Sage Riviera Campground) uses an onsite water well for turf irrigation. The pumped water is not metered, and the golf course operators do not know the total water use. An estimate of water demand for the golf course is based on the irrigated acreage, sandy soils, near-ocean climate, and water duty factors from the U.S. Golf Association, Alliance for Water Efficiency, U.S. Golf Courses Organization of America, and several other sources. The estimated rural water demand is provided in Table 13. Table 13. Estimated Rural Water Production Groundwater User No. of Units Estimated Water Production, AFY per Unit Estimated Annual Water Production, AF Notes Halcyon Water System 35 0.40 14 1 Ken Mar Gardens 48 -- 7 2 Pacific Dunes RV Resort 215 0.03 6 3 Pismo Beach Golf Course -- -- 45 4 Rural Users 25 0.40 10 1 Current Estimated Rural Production 82 Notes: 1 Water use/unit based on 2000 and 2005 Grover Beach water use per connection, 2005 UWMP. 2 Demand based on metered water usage. 3 Water use/unit assumes 50 percent annual occupancy and 0.06 AFY per occupied site. 4 Estimated golf course demand, based on estimated water duty factor, annual ET, and irrigated acreage. AF=acre feet, AFY = acre-feet per year ET = evapotranspiration UWMP = Urban Water Management Plan FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 33 4.2.3 Urban Production for Potable Use Urban water production for potable use is presented in Table 14 for each of the NCMA agencies from 2005 through 2019. These values reflect Lopez Lake deliveries, SWP deliveries, groundwater production data, and system losses, and represent all water used within the service areas of the four NCMA agencies. In the last 15 years, urban water production has ranged from 5,476 AF (2016) to 8,982 AF (2007). There has been an overall decline in urban production since 2007, although there were slight increases in 2012, 2013, 2017, and 2018. The long-term declining trend in production is likely attributed to the relatively slow economy from 2009 through 2012 and conservation activities implemented by the NCMA agencies in response to the historic drought. Since 2013, when urban production was 7,939 AF, urban production declined dramatically to 2016 to the lowest level in at least the past 20 years. The urban production increased slightly in 2017 and 2018 but declined in 2019 to 5,660 AF. Table 14. Urban Water Production for Potable Use (Groundwater and Surface Water, AF) Year Arroyo Grande Grover Beach Pismo Beach OCSD Total Urban 2005 3,460 2,082 2,142 931 8,615 2006 3,425 2,025 2,121 882 8,453 2007 3,690 2,087 2,261 944 8,982 2008 3,579 2,051 2,208 933 8,771 2009 3,315 1,941 2,039 885 8,180 2010 2,956 1,787 1,944 855 7,542 2011 2,922 1,787 1,912 852 7,473 2012 3,022 1,757 2,029 838 7,646 2013 3,111 1,792 2,148 888 7,939 2014 2,752 1,347 1,949 807 6,856 2015 2,239 1,265 1,736 703 5,943 2016 1,948 1,210 1,646 672 5,476 2017 2,194 1,248 1,700 718 5,860 2018 2,212 1,221 1,720 725 5,878 2019 2,139 1,193 1,648 680 5,660 Notes: AF = acre-feet, OCSD = Oceano Community Services District 4.2.4 2019 Groundwater Pumpage Total SMGB groundwater production in the NCMA, including urban production, applied agricultural water requirements, and rural pumping, is shown in Table 15. Total estimated SMGB groundwater pumpage in the NCMA in 2019 was 3,320 AF, which represents a decrease from 2018 (3,557 AF) and the lowest volume of groundwater production from the NCMA portion of the SMGB in at least the last 20 years. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 34 Table 15. NCMA Groundwater Pumpage from Santa Maria Groundwater Basin, 2019 (AF) Agency/Water User or Use Groundwater Allotment + Ag Conversion Credit (AF) 2019 Groundwater Use from SMGB (AF) Percent Pumped of Groundwater Allotment City of Arroyo Grande 1,202 + 121 = 1,323 81 7% City of Grover Beach 1,198 + 209 = 1,407 412 34% City of Pismo Beach 700 44 6% Oceano CSD 900 147 16% Total Urban Groundwater Allotment / Use 4,000 + 330 = 4,330 684 17% Agricultural Irrigation Applied Water 5,300 - 330 = 4,970 2,506 50% Nonpotable Irrigation by City of Arroyo Grande -- 48 -- Rural Water Users -- 82 -- Estimated Subsurface Outflow to Ocean (2001 Groundwater Management Agreement) 200 -- -- Total NCMA Groundwater Allotment / Use 9,500 3,320 35% Notes: AF = acre-feet, Ag = agriculture, CSD = Community Services District, NCMA = Northern Cities Management Area The total estimated groundwater pumpage of 3,320 in 2019 represents about 35 percent of the calculated yield of 9,500 AFY for the NCMA portion of the SMGB. A graphical depiction of water use by supply source for each NCMA agency since 2000 is presented as Figure 27. The graphs depict changes in water supply availability and use over time, including the increased use of SWP water during the early years of the period when SWP Table A deliveries were greater. The increased dependence in 2017, 2018, and 2019 on Lopez Lake is illustrated in this graphic. Although all four agencies pumped groundwater as part of their supply portfolios in 2019, groundwater pumped from the SMGB constituted a minor part of the overall water supply, an amount of 732 AF13 or 13 percent of overall urban use. As shown in Figure 28, groundwater pumpage reached a peak in 2007 and then declined in 2008, 2009, and 2010. From 2010 through 2013, pumpage increased slightly every year, but even so, overall groundwater use remained significantly lower than previous annual pumpage rates. From 2013 through the present, annual pumpage totals have been on a downward trend. In 2019, urban potable groundwater use declined to 708 AF; which is 16 percent of the 4,330 AF of combined urban groundwater allotment and agricultural conversion credit. 13 This total includes the 684 AF pumped by Arroyo Grande and 48 AF of non-potable irrigation production. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 35 4.2.5 Changes in Water Production Historical water use for urban uses, agricultural irrigation, and rural uses is shown in Table 16. Table 16. Total Water Use (Groundwater and Surface Water, AF) Year Arroyo Grande Grover Beach Pismo Beach OCSD Total Urban Agricultural Irrigation1 Rural Water Total Use 2005 3,460 2,082 2,142 931 8,615 2,056 36 10,707 2006 3,425 2,025 2,121 882 8,453 2,056 36 10,545 2007 3,690 2,087 2,261 944 8,982 2,742 36 11,760 2008 3,579 2,051 2,208 933 8,771 2,742 36 11,549 2009 3,315 1,941 2,039 885 8,180 2,742 36 10,958 2010 2,956 1,787 1,944 855 7,542 2,056 38 9,636 2011 2,922 1,787 1,912 852 7,473 2,742 38 10,253 2012 3,022 1,757 2,029 838 7,646 2,742 41 10,429 2013 3,111 1,792 2,148 888 7,939 2,742 42 10,722 2014 2,752 1,347 1,949 807 6,855 2,955 38 9,848 2015 2,239 1,266 1,736 703 5,943 3,008 38 8,990 2016 1,948 1,210 1,646 672 5,476 2,551 81 8,108 2017 2,194 1,248 1,700 718 5,860 2,579 80 8,519 2018 2,212 1,221 1,720 725 5,878 2,713 81 8,672 2019 2,139 1,193 1,648 680 5,660 2,554 82 8,296 Notes: 1 Irrigation applied water includes agricultural irrigation plus SMGB non-potable irrigation by Arroyo Grande. AF = acre-feet, CSD = Community Services District In general, urban water production has ranged from 8,982 AF in 2007 (Table 16) to 5,476 AF in 2016. Water use since 2007 has been on a general downward trend; this overall decline in water use may be attributed to conservation activities implemented by the NCMA agencies in response to the drought. In the agricultural irrigation category, agricultural acreage has remained fairly constant. Thus, annual applied water for agricultural irrigation varies mostly with weather conditions. Acknowledging the variability caused by weather conditions, agricultural irrigation applied water is not expected to change significantly given the relative stability of applied irrigation acreage and cropping patterns in the NCMA south of Arroyo Grande Creek. Changes in rural domestic pumping have not been significant. This page intentionally left blank. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 37 SECTION 5: Comparison of Water Supply and Water Production The Baseline Available Urban Water Supplies for each of the NCMA agencies is 10,625 AFY, assuming 100 percent delivery of SWP allocation and assuming no Lopez Lake surplus water or SWP carryover (Table 8). In 2019, because of the availability of Lopez Lake surplus water and SWP carryover water, the total available urban water supply was 11,472 AF (Table 9). As described in the 2001 Groundwater Management Agreement and affirmed in the 2002 Settlement Agreement, the calculated safe yield from the NCMA portion of the SMGB is 9,500 AFY (Tables 8 and 15). Because all agricultural irrigation water use is supplied by groundwater, the total available agricultural irrigation supply is a portion of the estimated safe yield; this portion was allocated as 5,300 AFY for agricultural and rural use. The agricultural conversion of 330 AFY reduces this allocation to 4,970 AFY. Of the estimated safe yield of 9,500 AFY, other than what is allocated for agricultural irrigation and rural use, the remaining 4,330 AFY is allocated for urban water use (4,330 AFY, including 4,000 AFY groundwater allocation plus 330 AFY in agricultural conversion credit) and an estimated 200 AFY for subsurface outflow to the ocean. In 2019, the total estimated NCMA water production was 8,296 AF (Table 17). The 2019 water production, by source, of each city and agency is shown in Table 17). Note that the production volumes described here are gross production (if pumped groundwater) and gross deliveries (if surface water deliveries) and equal net consumptive demand plus losses and return water. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 38 Table 17. Water Production by Source, 2019 (AF) Source Lopez Lake State Water Project SMGB Groundwater Other Supplies1 Total Urban Area Arroyo Grande 2,033 0 81 24 2,138 Grover Beach 782 0 412 0 1,194 Pismo Beach 1048 556 44 0 1,648 Oceano CSD 522 11 147 0 680 Urban Water Use Total 4,385 567 684 24 5,660 Non-Urban Area Agricultural Irrigation Applied Water 0 0 2,506 0 2,506 Rural Water Users 0 0 82 0 82 Non-potable Irrigation by Arroyo Grande 0 0 48 0 48 Total 4,385 567 3,320 24 8,296 Notes: 1 Other Supplies includes groundwater pumped from outside the NCMA boundaries. AF = acre-feet, SMGB = Santa Maria Groundwater Basin, CSD = Community Services District As shown in Table 17, urban water use in 2019 to the NCMA was supplied from 4,385 AF of Lopez Lake water; 567 AF of SWP water; and 684 AF of groundwater. Arroyo Grande produced 24 AF from its Pismo Formation wells in 2019. Based on the calculated yield of the NCMA portion of the SMGB, the baseline, or full allocation, of total available supply for all uses is 15,595 AFY, which is the sum of 10,625 AFY for urban use plus the allocation for agricultural irrigation and rural area of 4,970 AFY. In 2019, factoring in the SWP delivery schedule and availability of SWP carryover water and Lopez Lake surplus, the total available supply for all uses was 11,472 AF (Table 9) compared with actual 2019 NCMA water use of 8,296 AF (Table 17). It must be noted, however, that this comparative review of available 2019 supply versus production must be viewed with caution because of the potential threats to the groundwater supply (see Section 6.1, below). As described earlier, the NCMA agencies pumped only 17 percent of their “available” groundwater allotment. Such minimal utilization of the groundwater resource resulted in a minor gain of groundwater in storage in the NCMA portion of the SMGB, FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 39 which is likely attributable to the year of above average rainfall. It is clear that the NCMA agencies could not have used their entire groundwater allotment in 2019 without significantly lowering water elevations below current conditions and potentially seriously exacerbating the threat of seawater intrusion. This page intentionally left blank. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 41 SECTION 6: Threats to Water Supply Because the NCMA agencies depend on both local and imported water supplies, changes in either state-wide or local conditions can threaten the NCMA water supply. Water supply imported from other areas of the state may be threatened by state-wide drought, effects of climate change in the SWP source area, management and environmental protection issues in the Delta that affect the amount and reliability of SWP deliveries, and risk of seismic damage to the SWP delivery system. Local threats to the NCMA water supply similarly include extended drought and climate change that may affect the yield from Lopez Lake and reduced recharge to the NCMA. In addition, the NCMA is not hydrologically isolated from the NMMA and the rest of the SMGB, and water supply threats in the NMMA are a potential threat to the water supply sustainability of the NCMA. There is a potential impact from seawater intrusion if the groundwater system as a whole, including the entire SMGB, is not adequately monitored and managed. In particular, management of the SMGB may need to account for sea level rise and the relative change in groundwater gradient along the shoreline. 6.1 Threats to Local Groundwater Supply 6.1.1 Declining Water Levels Water levels in the NCMA portion of the SMGB exhibited an overall declining trend for many years but have started to recover since about 2016. Important factors to maintaining water levels are managing inflow and outflow to the aquifer.  Inflow: An important inflow component to the NCMA area is subsurface inflow into the aquifers that supply water wells serving the NCMA. Historically, subsurface inflow to the NCMA from the Nipomo Mesa along the southeast boundary of the NCMA has been an important component of groundwater recharge. This inflow is reduced from historical levels, as first recognized in 2008–2009, to “something approaching no subsurface flow” because of lower groundwater levels in the NMMA (NMMA 2nd Annual Report CY 2009, page 43) (NMMA, 2010). This condition continues, as described in all subsequent NMMA Annual Reports.  Outflow: A major outflow component is groundwater pumpage. Total SMGB groundwater pumping in the NCMA (urban, agriculture, and rural domestic) was 3,320 AF in 2019, which is 35 percent of the court- accepted 9,500 AF safe yield of the NCMA portion of the SMGB. Such minimal utilization of the groundwater resource resulted in only a minor gain of groundwater in storage in the aquifer and a relatively slight rise in water level elevations. However, it is clear that the NCMA agencies could not have used their entire groundwater allotment in 2019 without significantly lowering water elevations below current conditions and potentially seriously exacerbating the threat of seawater intrusion. The serious drought from 2011 to 2015 resulted in a steady decline in groundwater in storage in the NCMA portion of the SMGB. The recent slight increase of groundwater in storage (despite groundwater pumping at only 35 percent of the safe yield, which seemingly should have resulted in significant increases in groundwater in storage) illustrates the impacts of the recent drought. However, it also illustrates the impacts of reduced subsurface inflow recharge from the east (Nipomo Mesa). This condition of a long-term decline in groundwater in storage in the NCMA, even though total pumping is currently 35 percent of the basin safe yield, will be exacerbated if the NCMA agencies are required to increase groundwater withdrawals because of a reduction or total loss in local surface water supplies or SWP deliveries. 6.1.2 Seawater Intrusion The NCMA is underlain by an accumulation of alluvial materials that slope gently offshore and extend for many miles under the ocean (DWR 1970, 1975). Coarser materials within the alluvial materials comprise aquifer FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 42 zones that receive freshwater recharge in areas above sea level. If sufficient outflow from the aquifer occurs, the dynamic interface between seawater and fresh water will be prevented from moving onshore. Sufficient differential pressure to maintain a net outflow is indicated by onshore groundwater elevations that are above mean sea level and establish a seaward gradient to maintain that outflow. The 2008 NCMA Annual Report documented that a portion of the aquifer underlying the NCMA exhibited water surface elevations below sea level (NCMA, 2008). Hydrographs for NCMA sentry wells and the Deep Well Index (Figures 11 through 15) show that coastal groundwater elevations were at relatively low levels for as long as 2 years during that time. Such sustained low levels had not occurred previously in the historical record and reflected the impact of drought on groundwater levels. The low coastal groundwater levels indicated a potential for seawater intrusion. Elevated concentrations of TDS, chloride, and sodium were observed in wells 30N03 and 30N02 beginning in May 2009, indicating potential seawater intrusion (Figures 29 and 30). OCSD MW-Blue also showed elevated concentrations of TDS and chlorides, but a concurrent decline in sodium (Figure 30). Concentrations declined to historical levels in well 30N03 by July 2010 and declined in well 30N02, one of the sentry wells comprising the Deep Well Index, to historical levels by October 2009. Comparing well 30N02 to the other Deep Well Index wells, the other Deep Well Index wells showed no elevated concentrations during the same period. However, comparing well 30N02 to wells with similar screen elevations (Figure 4), wells 36L01 (approximately 12,000 feet south of well 30N02) and the OCSD MW-Blue well, approximately 3,300 feet east-southeast of well 30N02, suggested that seawater intrusion perhaps progressed eastward as far as the OCSD MW-Blue well, but not as far south as well 36L01 (Figure 30). While the TDS and chloride concentrations were elevated from August 2009 to July 2011 in the OCSD MW-Blue well, the sodium concentrations remained within historical levels. During the same period, TDS, chloride, and sodium concentrations remained within historical levels in well 36L01. During 2019, there were no indications of seawater intrusion. 6.1.3 Measures to Avoid Seawater Intrusion In recognition of the risk of seawater intrusion, the NCMA agencies have developed and implemented a water quality monitoring program for the sentry wells and OCSD observation wells. The NCMA agencies and SLOFCWCD have worked cooperatively toward the protection of the sentry wells as long-term monitoring sites. Several measures are employed by the NCMA agencies to reduce the potential for seawater intrusion. Specifically, the NCMA agencies have voluntarily reduced coastal groundwater pumping, decreased overall water use via conservation, and initiated plans, studies, and institutional arrangements to secure additional surface water supplies. As a result, each of the four major municipal water users in the NCMA reduced groundwater use between 25 and 95 percent during the past several years. In 2019, municipal groundwater use was 684 AF, which constitutes 17 percent of the urban user’s groundwater allotment (including agricultural conversion credits) of the basin safe yield (Table 7). Any action that results in reduced groundwater recharge, whether it is from drought or reduction of subsurface inflow from the north and east, reduces overall recharge to the groundwater basin, lowers the gradient (or head) of the groundwater near the shoreline, and reduces subsurface outflow to the ocean, thereby increasing the potential threat of seawater intrusion. Alternatively, any action that results in increased groundwater recharge lessens the threat of seawater intrusion. A major initiative that will provide significant protection to the threat of seawater intrusion is the development of Central Coast Blue. Central Coast Blue is a regional recycled water project that includes advanced treatment of water from the wastewater treatment plants of Pismo Beach and SSLOCSD and injection into the NCMA portion of the SMGB. Injection of the highly treated effluent will reduce the threat of seawater intrusion and FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 43 improve water supply sustainability for the region. Tasks related to the development of the project that were performed prior to and throughout 2019 include feasibility study analysis, preliminary design, pilot plant development and operation, funding appropriation, cost/benefit sharing analysis, groundwater modeling, and initial environmental review. 6.2 Threats to State Water Project Supply Both extended drought and long-term reduction in snowpack from climate change can affect SWP deliveries. Above-average precipitation in 2016, 2017, and 2019 have resulted in a modest reprieve from drought conditions, locally. However, storage capacity levels of the state’s two largest reservoirs, Lake Shasta and Lake Oroville, were 50 and 29 percent capacity, respectively, as of the start of 2019, both down from the previous year. Leading into 2020, rainfall during the last 8 months of 2019 resulted in 7.21 inches of rain. The initial allocation announcement by DWR, announced on December 2, 2019, informed SWP contractors that their 2020 allocation would be 10 percent of requests for deliveries. The Table A allocation was subsequently increased on January 24, 2020, to 15 percent. As the winter rainfall season progresses, the allocations often increase by March or April. The last 100 percent allocation—difficult to achieve even in wet years largely because of Delta pumping restrictions to protect threatened and endangered fish species—was in 2006. The immediate threat of allocation reductions to Pismo Beach and OCSD, the only SWP subcontractors in the NCMA, has not significantly materialized during the past several years. The SLOFCWCD’s large amount of unsubscribed Table A allocation provides a buffer, in addition to the agency’s drought buffer, so that contracted volumes to SWP subcontractors, such as the OCSD and Pismo Beach, still may be provided in full. However, the SWP supply has the potential to be affected by drought as well as environmental issues, particularly involving the Delta smelt. 6.3 Threats to Lopez Lake Water Supply Extended drought conditions in recent years have contributed to record low water levels in Lopez Lake; the impacts of climate change may affect future precipitation amounts in the Lopez Creek watershed. As discussed in Section 4.1.1, the Zone 3 agencies developed and implemented the LRRP in response to reduced water in storage in the lake. The LRRP is intended to reduce municipal diversions and downstream releases as water levels drop in order to preserve water within the reservoir for an extended drought. Despite below- average precipitation in 2018, above-average precipitation in 2016, 2017, and 2019 resulted in a return to non-drought conditions in the lake. However, even with reduced diversions and releases, water from Lopez Lake may be significantly reduced or unavailable to the Zone 3 agencies in the event of future drought. Without access to water from Lopez Lake, the NCMA agencies and local agriculture stakeholders may be forced to rely more heavily on their groundwater supplies and increase pumping during extended drought conditions, which could result in lowering water levels in the aquifer and an increased threat from seawater intrusion. Moreover, a reduction in downstream releases from the reservoir, as mandated by the LRRP, likely will lead to reduced recharge to the NCMA portion of the SMGB and further contribute to declining groundwater levels. This page intentionally left blank. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 45 SECTION 7: Management Activities The NCMA and overlying private well users have actively managed surface water and groundwater resources in the NCMA agencies area for more than 30 years. Management objectives and responsibilities were first established in the 1983 Gentlemen’s Agreement, recognized in the 2001 Groundwater Management Agreement, and affirmed in the 2002 Settlement Agreement. The responsibility and authority of the Northern Parties for NCMA groundwater management was formally established through the 2002 Settlement Agreement, 2005 Stipulation, and 2008 Judgment. Throughout the long history of collaborative management, which was formalized through the Agreement, Stipulation, and Judgment, the overall management goal for the NCMA agencies is to preserve the long-term integrity of water supplies in the NCMA portion of the SMGB. 7.1 Management Objectives Eight basic Water Management Objectives have been established for ongoing NCMA groundwater management: 1. Share Groundwater Resources and Manage Pumping 2. Enhance Management of NCMA Groundwater 3. Monitor Supply and Demand and Share Information 4. Manage Groundwater Levels and Prevent Seawater Intrusion 5. Protect Groundwater Quality 6. Manage Cooperatively 7. Encourage Water Conservation 8. Evaluate Alternative Sources of Supply Each of these objectives is discussed in the following sections. Under each objective, the NCMA TG has identified strategies to meet the objectives. These strategies are listed and then discussed under each of the eight objectives listed below. Other potential objectives are outlined in the final section. An NCMA Strategic Plan was developed in 2014 to provide the NCMA TG with a mission statement to guide future initiatives, provide a framework for identifying and communicating water resource planning goals and objectives, and formalize a 10-year work plan for implementation of those efforts. Several key objectives were identified related to enhancing water supply reliability, improving water resource management, and increasing effective public outreach. Implementation of some of these efforts continued throughout 2019. Work began in 2019 to update the 2014 NCMA Strategic Plan. The Strategic Plan was developed over a series of strategic planning sessions and NCMA TG meetings. The purpose of the Strategic Plan is to provide the NCMA TG with the following:  A Mission Statement to guide future initiatives;  A framework for communicating water resource goals; and  A formalized Work Plan for the next 10 years. Through the strategic planning process, the NCMA TG identified several key strategies to guide future efforts. These key strategies include the following: FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 46  Enhance groundwater management;  Develop supplemental water supply;  Improve understanding of the NCMA groundwater;  Improve water management governance; and  Increase inter-agency coordination. Several strategic initiatives were developed for each key strategy, and an extensive screening and objective ranking process was applied. Utilizing the ranked and grouped strategic initiatives, the NCMA TG is developing an implementation plan for the key strategies. The implementation plan will include for each initiative the key participants, the NCMA lead, an estimated budget, and an implementation time frame. Through the 2019 strategic planning process, the NCMA TG identified several key strategic initiatives for each strategy. These initiatives include the following: A. Enhance Groundwater Management  Complete an update to the 2002 Management Agreement, including the development of a Low Basin Response Plan  Use the Phase 1B groundwater model to simulate regional groundwater management scenarios  Prepare a groundwater sustainability plan consistent with SGMA requirements  Develop a conjunctive use plan to optimize use of available groundwater storage B. Develop Supplemental Water Supply  Implement Central Coast Blue  Prepare a stormwater capture feasibility study C. Improve Understanding of the NCMA Groundwater  Re-evaluate the NCMA Deep Well Index  Expand the water quality database to include all water quality data  Construct additional monitoring well  Complete Phase 2 groundwater flow model for SMGB D. Improve Water Management Governance  Improve managerial and legal coordination  Prepare bi-annual presentation to County Board of Supervisors E. Increase Inter-Agency Coordination  Complete intertie plan for NCMA agencies  Select a NCMA logo  Prepare an infrastructure resiliency analysis In January 2015, the NCMA agencies developed a Water Supply, Production and Delivery Plan (WSPDP) that applies the strategic objectives to the various supplies available to the area. The NCMA area receives supplies from Lopez Lake, the SWP, and the SMGB. The purpose of the WSPDP is to provide the NCMA agencies with a delivery plan that optimizes use of existing infrastructure and minimizes groundwater pumping from the SMGB. The plan includes the development of a water supply and delivery modeling tool for the NCMA agencies, evaluation of three delivery scenarios, and development of recommendations for water delivery. The WSPDP made recommendations that were implemented or subject to further study. These recommendations are summarized in subsequent sections, and include the following: FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 47  Continue ongoing water conservation efforts to limit demand and make additional supply available for potentially future dry years.  Immediately implement the strategies identified in Scenario 1, Baseline Delivery, to minimize SMGB groundwater pumping in the near term. These recommendations reinforce the ongoing management efforts by the NCMA and provide potential projects to improve water supply reliability and protect water quality during the ongoing drought. Ongoing work to implement the recommendations includes evaluation of additional delivery facilities to add operational flexibility to ensure optimum use of all supplies. Implementing the WSPDP has allowed the NCMA to minimize the use of groundwater thereby protecting against seawater intrusion while meeting the needs of its customers and other water users. The NCMA agencies, in conjunction with the other Zone 3 agencies and SLOFCWCD, continue efforts to evaluate potential drought emergency options and implement drought emergency actions. This initiative includes identification, evaluation, and ranking of potential options available to Zone 3 to improve the reliability of its water supplies. The Zone 3 agencies and the County have pledged to work collaboratively to continue to evaluate and implement emergency water supply reliability options as required in conditions of extended drought. A drought emergency action initiated by Zone 3 is cloud seeding. In 2019, the County Board of Supervisors, in coordination with the NCMA agencies and other Zone 3 partners, approved a professional services contract for the 2019-2020 Winter Season Cloud Seeding Program for the Lopez Lake Watershed. The program is conceived to be a 3-year program. At this time, Zone 3 is committing to the first year (2019-2020) only and will return to the Board in subsequent years for further approval. Additional potential drought emergency options that the Zone 3 agencies have evaluated in the past few years include the following: Zone 3 Extended Drought Emergency Options:  State Water Project. Maximize importation of SLOFCWCD SWP supplies, including subcontractor supplies and the large amount of unsubscribed Table A allocation.  Surplus Nacimiento Water Project (NWP) Water. Investigate transfer/exchange opportunities to obtain surplus NWP water for the Zone 3 agencies (i.e., exchange agreements with the City of San Luis Obispo and the Chorro Valley pipeline SWP subcontractors).  Water Market Purchases. Investigate opportunities to obtain additional imported water and deliver it to the Zone 3 agencies through the SWP infrastructure (e.g., exchange agreements with San Joaquin/Sacramento Valley farmers, water broker consultation, groundwater banking exchange agreements, and others).  Morro Bay Desalination Plant Exchanges. Investigate opportunities to obtain SWP water from Morro Bay by providing incentives for Morro Bay to fully utilize its desalination plant capacity.  Land Fallowing. Evaluate potential agreements with local agriculture representatives to offer financial incentives to fallow land within the Arroyo Grande and Cienega Valleys to make that irrigation water available for municipal use.  Enhanced Conservation. Evaluate opportunities for enhanced water conservation by the Zone 3 agencies (e.g., water rationing, no outdoor watering, agriculture water restrictions) to preserve additional water.  Nacimiento/California Men’s Colony Intertie. Complete design of a pipeline that would connect the NWP pipeline to the California Men’s Colony (CMC) Water Treatment Plant. Investigate opportunities for Zone 3 FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 48 agencies to purchase NWP water and use exchange agreements and existing infrastructure to deliver additional water to Zone 3 through the Coastal Branch pipeline. 7.1.1 Share Groundwater Resources and Manage Pumping Strategies:  Continued reduction of groundwater pumping; maintain pumping below safe yield.  Coordinated delivery of Lopez Lake water to the maximum amount available, pursuant to the LRRP.  Continue to import SWP supplies to OCSD and Pismo Beach.  Maintain surface water delivery infrastructure to maximize capacity.  Utilize Lopez Lake to store additional SWP water within San Luis Obispo County.  Modify Zone 3 agency contracts to incorporate storage provisions in the contract. Discussion: A longstanding objective of water users in the NCMA has been to cooperatively share and manage groundwater resources. In 1983, the Northern Parties mutually agreed on an initial safe yield estimate and an allotment of pumping between the urban users and agricultural irrigation users of 57 percent and 43 percent, respectively. In this agreement, the NCMA agencies also established pumping allotments among themselves. Subsequently, the 2001 Groundwater Management Agreement included provisions to account for changes such as agricultural land conversions. The agreements provide that any change in the accepted safe yield based on ongoing assessments would be shared on a pro rata basis. Pursuant to the 2005 Stipulation, the NCMA agencies conducted a water balance study to update the safe yield estimate (Todd, 2007). As a result, the NCMA agencies agreed to maintain the existing pumping allotment among the urban users and established a consistent methodology to address agricultural land use conversion. In addition to cooperatively sharing and managing groundwater resources, the NCMA agencies have coordinated delivery of water from Lopez Lake. At the same time, Pismo Beach and OCSD have continued to import SWP water. Both actions maximize use of available surface water supplies. In 2016, in response to the ongoing drought at that time and the threat of diminishing water supplies, Arroyo Grande approved a measure authorizing the City to purchase SWP water from the SLOFCWCD’s excess allotment on a temporary basis and only during a declared local water emergency. That condition was not reached in 2017 nor subsequent years, and Arroyo Grande has not purchased SWP water to date. An initiative to modify the Zone agency contracts to incorporate storage provisions into agency contracts was started in late 2019. By the end of 2019, the Zone 3 Technical Advisory Committee was evaluating contract language changes to allow for the following:  Allow for year-over-year individual agency storage;  Account for evaporation losses of stored water;  Allow for the reduction of entitlements or to utilize stored water to meet downstream release requirements;  Develop mechanisms to address the condition when the Zone 3 agencies do not have water to contribute to downstream release obligations;  Clarify Lopez turnout delivery capacity limitations;  Remove antiquated language from the contract that is no longer relevant, and; FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 49  Allow for exchanges of Lopez Lake water with SWP water during times when there is a curtailment of delivery of Lopez Lake water due to maintenance projects. The benefits of the initiative to modify the contract language is to provide the ability of each agency to store water for future drought, improve flexibility of multi-year water supply planning, and provides an incentive for agencies to preserve water in the reservoir. The WSPDP now provides a framework for the NCMA, as a whole, to actively and effectively manage the groundwater resource, particularly in years of below-normal rainfall and below “normal” SWP delivery schedules. The WSPDP outlined a strategy to provide sufficient supplies to NCMA water users in instances of reduced SWP delivery. Specifically, in 2019, municipal groundwater pumpage at 684 AF (732 AF including non-potable water pumped by Arroyo Grande) was less than any other year during the 21-year period from 1999 through 2019 (inclusive). Seawater intrusion is the most important potential adverse impact for the NCMA agencies to consider in the efforts to effectively manage the aquifer. Seawater intrusion, a concern since the 1960s, would degrade the quality of water in the aquifer and potentially render portions of the SMGB unsuitable for groundwater production (DWR, 1970). A Deep Well Index of the three primary deep sentry wells of 7.5 feet (NAVD 88) has been recognized as the threshold, above which it is thought that there is sufficient fresh water (groundwater) outflow to prevent seawater intrusion. From late 2009 to April 2013, the NCMA agencies’ management of groundwater levels and groundwater pumpage maintained the Deep Well Index above the 7.5-foot level. Then in mid-to-late 2013, 2014, and 2015, groundwater levels dropped below the target index value on several occasions and often remained below the target elevation for several months on end. In 2015, the groundwater levels were generally between 4 and 7 feet below the 7.5-foot target index level. Groundwater elevations dropped below the Deep Well Index threshold several months in 2016, but this occurred for a shorter duration than in 2015, with groundwater elevations reaching less than 2 feet below the target value. In 2017, the Deep Well Index remained above the 7.5-foot threshold value the entire year for the first time since 2012 (except for a very brief period between August 18 and August 29, 2017, when the agencies were forced to increase groundwater pumping due to a maintenance shutdown of the Lopez Lake water supply). In 2018, the Deep Well Index started the year above the trigger value, then dropped below the 7.5-foot threshold in early July. For more than 4 months, the Deep Well Index remained below the index trigger value, reaching an index value of approximately 6.5 feet in late October. In late November 2018, it rose above the threshold value where it remained through the end of the year (Figure 12). In 2019, the Deep Well Index started the year above the trigger value with an index value of more than 9 feet in January. It continued to rise, reached a high at more than 11 feet in late March, and then began to decline. The index value dropped down to the 7.5-foot trigger value briefly in late October and then immediately began to rise. The index value continued to rise throughout the end of the year and finished 2019 at about 10.5 feet NAVD 88 (Figure 12). Another potential adverse impact of localized pumping includes reduction of flow in local streams, notably Arroyo Grande Creek (Todd, 2007). The NCMA agencies (as Zone 3 contractors) have participated with SLOFCWCD in preparation of the Arroyo Grande Creek Habitat Conservation Plan (HCP) that addresses reservoir releases to maintain both groundwater levels and habitat diversity in the creek. Efforts by the SLOFCWCD to conduct the hydraulic studies to finalize the HCP have been started are ongoing. The scheduled completion of the HCP is not certain. 7.1.2 Enhance Management of NCMA Groundwater Strategies:  Develop a groundwater model for the NCMA/NMMA or the entire SMGB. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 50  Coordinate with the County and NMMA to develop new monitoring well(s) in key locations within the SMGB.  Develop a Salt and Nutrient Management Plan (SNMP) for the NCMA/NMMA.  Develop and implement a framework for groundwater storage/conjunctive use, including return flows.  Update the 2001 Management Agreement. Discussion: The NCMA agencies participated in the oversight of the performance of the SMGB characterization study (Fugro, 2015) that was finalized with the distribution of the complete data sets in March 2016. The project was conducted as part of the County IRWMP 2014 update, in part to prepare for and to provide the foundational data for development of a numerical groundwater flow model and preparation of a basin-wide SNMP. To date, the SNMP has not been initiated, but the groundwater flow modeling work has been completed through Phase 1B, as described below. This groundwater flow model is associated with Central Coast Blue, a recycled water project formerly known as the Regional Groundwater Sustainability Project. The intent of Central Coast Blue is to enable Pismo Beach, partnering NCMA agencies, and the SSLOCSD to construct an advanced treatment facility (ATF) to produce advanced purified water (APW) to augment its water supply through injection to recharge the aquifer and develop a seawater intrusion barrier to improve water supply reliability for the area. As part of Central Coast Blue planning and technical studies, a localized groundwater flow model (the Phase 1A model) was developed for the northern portion of the NCMA that evaluated the concept of injecting APW into the aquifer to increase recharge, improve water supply reliability and help prevent future occurrences of seawater intrusion. Based on the results of the Phase 1A model and through funding by SSLOCSD Supplemental Environmental Program, work was initiated in 2017 and continued through 2019 for development of the Phase 1B groundwater flow model. The model domain of the Phase 1B model covers the entire NCMA, NMMA, and the portion of the SMVMA north of the Santa Maria River. The purpose of the Phase 1B model is to evaluate additional groundwater injection and extraction scenarios to further support Central Coast Blue. It will be utilized to identify the locations of the proposed injection wells, quantify the amount of water that can be injected, evaluate strategies for preventing seawater intrusion, and develop estimates of the overall yield that the Central Coast Blue stakeholders will be able to receive from the project. The Phase 1B model will be a tool for the NCMA agencies to further evaluate basin yield and basin management initiatives. The Phase 1B modeling work was completed in December 2019. As part of the SLOFCWCD’s SMGB characterization study (Fugro, 2015), continuous monitoring transducers were installed in 2015 in coastal sentry wells 36L01 and 36L02 (which are part of the NCMA monitoring program) and in wells 11N/36W-12C01 and 11N/36W-12C02 (located in the NMMA and monitored by the County and by NMMA). As a result, continuous water level and field-parameter water quality data were collected from these wells throughout 2019. As discussed in Section 7.1, the 2019 update of the NCMA strategic plan has placed a high priority on updating the 2001 Management Agreement. This effort will likely be a major effort in 2020. The monthly NCMA TG meetings provide for collaborative development of joint budget proposals for studies and plans and shared water resources. In addition, the monthly meetings provide a forum for discussing the data collected as part of the quarterly monitoring reports. 7.1.3 Monitor Supply and Demand and Share Information Strategies:  Develop coordinated Urban Water Management Plans (UWMPs) for the NCMA agencies. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 51  Develop a coordinated Water Shortage Contingency Plan to respond to a severe water shortage condition in the NCMA.  Share groundwater pumping data at monthly NCMA TG meetings.  Evaluate future water demands through comparison with the following UWMP projections:  Arroyo Grande 2015 UWMP (revised and updated, January 2017)  Pismo Beach 2015 UWMP (June 2016)  Grover Beach 2010 UWMP (June 2011)  OCSD is not required to prepare an UWMP because the community population does not meet the minimum requirement threshold. Discussion: Arroyo Grande and Pismo Beach prepared updated UWMPs in 2016 and 2017, respectively. Grover Beach is currently developing an updated UWMP that is expected to be complete by this summer. OCSD is not required to prepare an UWMP because the community population does not meet the minimum requirement threshold; however, many of the aspects of a UWMP are addressed through OCSD’s participation in the NCMA planning process. Regular monitoring of activities that affect the groundwater basin and sharing that information have occurred for many years. The monitoring efforts include gathering data on hydrologic conditions, water supply and demand, and groundwater pumping, levels, and quality. The current monitoring program is managed by the NCMA agencies in accordance with the 2005 Stipulation and the 2008 Judgment, guided by the July 2008 Monitoring Program for the NCMA. The monitoring data and a summary of groundwater management activities are summarized in the annual reports. Arroyo Grande, Grover Beach, and Pismo Beach have each evaluated their future water demands as part of their respective UWMPs. The NCMA shares information with the two other management areas (NMMA and SMVMA) through data exchange and regular meetings throughout the annual report preparation cycle. The NCMA TG believes that the UWMP process by each individual agency is adequate and that a coordinated UWMP is not necessary. Management activities have become more closely coordinated among the NCMA agencies as a result of the 2011 through 2016 drought. In particular, the NCMA agencies implemented the LRRP to limit municipal diversions and downstream releases from Lopez Lake to ensure that water is available for future potentially dry years. In addition, the Zone 3 agencies (which include the NCMA agencies) initiated a long-term drought planning effort. The planning effort is intended to prepare water supplies for periods of extended drought conditions. 7.1.4 Manage Groundwater Levels and Prevent Seawater Intrusion Strategies:  Use stormwater ponds to capture stormwater runoff and recharge the groundwater basin.  Install transducers in key monitoring wells to provide continuous groundwater elevation data. The following wells have transducers:  24B03  30F03  30N02  36L01  36L02  32C03 (County Monitoring Well No. 3) FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 52  Collect and evaluate daily municipal pumping data to determine the impact on local groundwater elevation levels. Discussion: Prevention of seawater intrusion through the management of groundwater levels is essential to protect the shared resource. The NCMA agencies increase groundwater recharge with stormwater infiltration and closely monitoring groundwater levels and water quality in sentry wells along the coast. Arroyo Grande and Grover Beach each maintain stormwater retention ponds within their jurisdictions; the SLOFCWCD maintains the stormwater system, including retention ponds, in OCSD. These ponds collect stormwater runoff, allowing it to recharge the underlying aquifers. There are approximately 140 acres of detention ponds in Arroyo Grande and 48 acres of detention ponds in Grover Beach. The stormwater detention pond in OCSD is approximately one-half acre. Grover Beach modified its stormwater system in 2012 to direct additional flow into one of its recharge basins. The San Luis Obispo County Stormwater Resources Plan (Stormwater Resources Plan) (SLO Co., 2019) was submitted to the SWRCB for review on February 28, 2019. The purpose of this Stormwater Resources Plan is to identify and prioritize stormwater and dry weather runoff capture projects in the County through detailed analyses of watershed conditions and processes, surface and groundwater resources, and the multiple benefits that can be achieved through stormwater-related capital projects and other programmatic actions (SLO Co., 2019). The Stormwater Management Plan identifies four proposed projects within the NCMA, including the Pismo Preserve Roads Improvement Project, the Oceano Drainage Improvement Project (which is nearly complete and will be completed in 2020), South Halcyon Green/Complete Street, and a stormwater infiltration basins project. In 2019, Oceano CSD started design of the Oceano Stormwater Capture and Groundwater Recharge Project These proposed projects emphasize water supply augmentation, environmental restoration and other community benefits, including an estimated annual infiltration capacity of 26 AF and an instantaneous floodwater capture capacity of 3.37 AF (SLO Co., 2019). Although closely related to the objectives to manage pumping, monitor supply and demand, and share information, this objective also specifically recognizes the proximity of production wells to the coast and the threat of seawater intrusion. The NCMA agencies and SLOFCWCD have long cooperated in the monitoring of groundwater levels, including quarterly measurement by the NCMA of groundwater levels in sentry wells at the coast. Upon assuming responsibility for the coastal monitoring wells, the NCMA became aware of the need to upgrade the condition of the sentry wells. In July 2010 the wellheads (surface completions) at the four sentry monitoring well clusters in the NCMA were renovated (Todd, 2010). The renovations included raising the elevations of the top of each individual well casing by 2 to 3 feet and resurveying relative to the NAVD 88 standard in late September 2010 (Wallace Group, 2010). The individual well casings are now above the ground surface and protective locking steel risers enclose each cluster. As a result of this work, the sentry wells in the NCMA now are protected from surface contamination and tampering. Quarterly measurement of groundwater levels aids in assessing the risk of seawater intrusion along the coast. To enhance the data collection and assessment efforts, the NCMA installed transducers in four of the key sentry monitoring wells to provide continuous groundwater levels at key locations (originally, a transducer was placed in the shallow completion 24B01, but was later removed). By combining this with the collection and evaluation of daily municipal pumping data, the NCMA is better able to determine the response of local groundwater levels to extractions and, therefore, is able to better manage the aquifer and NCMA portion of the SMGB. To gain insight into water level fluctuation and water quality variation in the area between the NCMA and NMMA, a continuous monitor was installed in County Monitoring Well #3 (32C03), which was constructed and FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 53 is owned by the County as part of the County-wide groundwater monitoring network. Water level monitoring was initiated in April 2012, when sensors were installed to document water level, temperature, and specific conductivity. In 2015, continuous monitoring sensors were installed in coastal monitoring wells 36L01 and 36L02 located in the Oceano Dunes. Data from the transducers in these wells now are collected on a quarterly basis along with the other sentry wells. Additional studies to enhance basin management efforts that have been discussed by the NCMA TG include the following:  Consider implementation of a monthly water level elevation data analysis of the sentry wells during periods when the Deep Well Index value is below the index target of 7.5 feet NAVD 88 for an extended period of time. Given that the index generally has remained steady because of reduced groundwater pumping, the NCMA has deferred the issue of monthly analysis.  Consider implementation of a monthly analysis of electrical conductivity data from the wells with downhole transducers during periods when the Deep Well Index value is below the index target of 7.5 feet to track potential water quality degradation (an enhanced monitoring schedule of County Monitoring Well No. 3 is not necessary because background water quality does not change or fluctuate significantly). If electrical conductivity data suggest water quality degradation, implement a monthly sampling and monitoring program. (Given that the index generally has remained steady because of reductions in groundwater pumping, the NCMA has deferred the issue of monthly analysis.)  Assess the potential impacts on sentry well water level elevations from extended periods of increased groundwater pumping by conducting analytical modeling analyses to predict water level responses given certain pumping scenarios. These analyses may prove fruitful as scenarios unfold regarding decreased SWP deliveries or short-term emergency cuts to Lopez Lake deliveries. Utilization of the Phase 1B model may be used for this purpose in 2020 and beyond.  The 2005 Stipulation requires Nipomo Community Services District (NCSD) and the other NMMA parties to develop a Nipomo Supplemental Water Project (NSWP) to import a minimum of 2,500 AFY to mitigate overpumping that may impact groundwater inflow to the NCMA, and thus may facilitate seawater intrusion in both NCMA and NMMA. On July 2, 2015, the NCSD began taking deliveries of water from the City of Santa Maria. The NSWP is designed to deliver 3,000 AFY, however current deliveries are about 950 AFY. The additional stages of the NSWP and funding sources to implement the project to allow increased water delivery to meet the requirements of the 2008 Judgment are being planned; full implementation of the project is apparently planned for 2025–2026. 7.1.5 Protect Groundwater Quality Strategies:  Perform quarterly water quality monitoring at all sentry wells and County Well No. 3.  Gather temperature and electrical conductivity data from monitoring wells to continuously track water quality indicators for seawater intrusion.  Prepare an SNMP pursuant to state policy using the results of the SMGB characterization study (Fugro, 2015).  Construct Central Coast Blue.  Support regional recycled water project planning through performance of a Recycled Water Facility Planning Study (RWFPS) by the SSLOCSD. The RWFPS was completed in 2017. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 54 Discussion: The objective to protect groundwater quality is closely linked with the objective for monitoring and data sharing. To meet this objective, all sources of water quality degradation, including the threat of seawater intrusion, need to be recognized. Water quality threats and possible degradation affect the integrity of the groundwater basin, potentially resulting in loss of use or the need for expensive water treatment processes. Sentry wells are monitored quarterly and data from other NCMA production wells are assessed annually. The monitoring program includes evaluation of potential contaminants in addition to those that might indicate seawater intrusion. Temperature and electrical conductivity probes have been installed in five monitoring wells to provide continuous water quality tracking for early indication of seawater intrusion. A sixth sentry well cluster (36L) in the Oceano Dunes was instrumented in April 2015 as part of the SMGB characterization study (Fugro, 2015). The results of the SMGB characterization study provide the foundation for preparation of an SNMP. Investigations continued throughout 2019 for work associated with Pismo Beach’s Central Coast Blue project. These efforts continue to follow up on Pismo Beach’s RWFPS to investigate alternatives for constructing a recycled water system that will enable the NCMA agencies to beneficially use recycled water to augment their groundwater supply and provide a new, drought-proof source of water supply for the area. 7.1.6 Manage Cooperatively Strategies:  Improve agriculture outreach by enhancing coordination with local growers.  Coordinate groundwater monitoring data sharing and annual report preparation with the NCMA, NMMA, and the SMVMA.  Improve interagency coordination among the NCMA agencies and include the County. Discussion: Since 1983, NCMA management has been based on cooperative efforts of the affected parties, including the NCMA agencies, private agricultural groundwater users, the County, the SLOFCWCD, and other local and state agencies. Specifically, the NCMA agencies have limited their pumping and, in cooperation with SLOFCWCD, invested in surface water supplies to not exceed the safe yield of the NCMA portion of the SMGB. Other organizations participate, as appropriate. In addition to the efforts discussed in this 2019 Annual Report, cooperative management occurs through many other venues and forums, including communication by the NCMA agencies in their respective public meetings and participation in the Water Resources Advisory Council (the county-wide advisory panel on water issues). The NCMA agencies participated in preparation and adoption of the 2014 update of the County IRWMP. The IRWMP promotes integrated regional water management to ensure sustainable water uses, reliable water supplies, better water quality, environmental stewardship, efficient urban development, protection of agriculture, and a strong economy. The IRWMP integrates all of the programs, plans, and projects within the region into water supply, water quality, ecosystem preservation and restoration, groundwater monitoring and management, and flood management programs. Since the 2008 Judgment, the NCMA has taken the lead in cooperative management of its management area. The NCMA TG met monthly throughout 2019 and has been a willing and active participant in the SMGBMA technical subcommittee, which first met in 2009 (the SMGBMA technical subcommittee did not meet in 2019). The purpose of the SMGBMA technical subcommittee is to coordinate efforts— such as enhanced monitoring of groundwater levels and improved sharing of data—among the management areas. With the current threats FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 55 to water supply in all management areas, greater communication, analytical collaboration, and data sharing are encouraged, especially between NCMA and NMMA. An outcome of actions initiated by NCMA in early 2016 resulted in increased discussion and collaboration between the NCMA and NMMA in the past three years. The NCMA-NMMA Management Coordination Committee met several times in 2017, 2018, and 2019 to discuss items of mutual concern and develop strategies for addressing the concerns. Another area of increased mutual collaboration between the NCMA and NMMA was the formation of a technical team, consisting of representatives from the NCMA and NMMA, to collaboratively develop a single data set of water level data points to prepare a consistent set of semiannual water level contour maps for the NCMA and NMMA, so that the maps from each management area would represent a mutually agreed upon condition at the NCMA/NMMA boundary. This collaboration continued throughout 2019 through continued assessment and evaluation of the water level database, sharing of new data, and discussions of knowledge of hydrogeologic conditions gained. The result has been a series of groundwater elevation contour maps of both the NCMA and the NMMA that reflect water level conditions at the NCMA/NMMA boundary. A third initiative was to create a Modeling Subcommittee, composed of representatives from the NCMA and NMMA, to discuss the feasibility and possible work scope for the development of a numerical groundwater flow model of the SMGB, or at least the portion of the basin north of the Santa Maria River. When the Phase 1B groundwater flow model project was initiated in 2017, representatives from this subcommittee formed a technical review and advisory committee to provide input to the modeling consultant and monitor progress. An NMMA representative participated in the technical review and in an advisory capacity throughout the development of the Phase 1B model. 7.1.7 Encourage Water Conservation Strategies:  Share updated water conservation information.  Implement UWMPs. Discussion: Water conservation, or water use efficiency, is linked to the monitoring of supply and demand and the management of pumping. Water conservation reduces overall demand on all sources, including groundwater, and supports management objectives to manage groundwater levels and prevent seawater intrusion. In addition, water conservation is consistent with state policies seeking to achieve a 20 percent reduction in water use by the year 2020. Water conservation activities in the NCMA are summarized in various documents produced by the NCMA agencies, including the 2015 UWMPs of Arroyo Grande and Pismo Beach and the 2010 UWMP of Grover Beach. OCSD is not required to prepare an UWMP. In addition to ongoing water conservation efforts, the drought conditions that extended throughout 2016 led the NCMA agencies to increase their efforts to reduce water use. The statewide mandatory water conservation requirements (signed into law on April 1, 2015, by the governor [Executive Order B-29-15] that enacted mandatory water conservation requirements because of the ongoing drought conditions and the historic low Sierra snowpack measurements) were continued throughout 2016 and into early 2017. On April 7, 2017, the State of California lifted the drought emergency and State mandated water use restrictions throughout the state. The water conservation measures instituted by each NCMA agency are summarized below. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 56 Arroyo Grande On April 7, 2017, the State of California took action to lift the drought emergency and State mandated water use restrictions throughout the state. The action also eliminated the State’s mandate for Arroyo Grande to save 28 percent of its water use. In response, the Arroyo Grande City Council approved and adopted a resolution in May 2017, rescinding the Stage 1 Water Shortage Emergency in the City, which removes temporary water use limitations that established individualized water budgets for all residential customers. During the State-mandated Stage 1 restrictions, Arroyo Grande’s water use reduction was, on average, 42 percent compared with 2013, thereby meeting and exceeding the state mandates. The City Council’s action was based on a determination that there is no immediate or imminent threat to the City’s ability to meet the community’s water supply needs. However, all established mandatory water use restrictions remained in effect, including limitations on outdoor irrigation and continued adherence to four-day outdoor irrigation based on the property address. These mandatory water use restrictions remained in place throughout 2019. Mandatory water conservation measures include the following:  Use of water that results in excessive gutter runoff is prohibited.  No water will be used for cleaning driveways, patios, parking lots, sidewalks, streets, or other such use except where necessary to protect the public health and safety.  Outdoor water use for washing vehicles will be attended and have hand-controlled water devices.  Outdoor irrigation is prohibited between 10 a.m. and 4 p.m.  Irrigation of private and public landscaping, turf areas, and gardens is permitted at even-numbered addresses only on Mondays and Thursdays, and at odd-numbered addresses only on Tuesdays and Fridays.  No irrigation of private and public landscaping, turf areas, and gardens is permitted on Wednesdays. Irrigation is permitted at all addresses on Saturdays and Sundays.  In all cases, customers are directed to use no more water than necessary to maintain landscaping.  Emptying and refilling swimming pools and commercial spas is prohibited except to prevent structural damage and/or to provide for the public health and safety.  Use of potable water for soil compaction or dust control purposes in construction activities is prohibited.  New swimming pools may be constructed; however, they will have a cover that conforms to the size and shape of the pool and acts as an effective barrier to evaporation. The cover must be in place during periods when use of the pool is not reasonably expected to occur.  Hotel, motel, or other commercial lodging establishments will offer patrons the option to forego the daily laundering of towels, sheets, and other linens.  Restaurants or other commercial food service establishments will not serve water except upon the request of a patron. To help manage the use of water, the City offers water conservation incentive programs designed to decrease overall water use. The conservation and incentive programs include the following:  Plumbing Retrofit Program. This program includes installation or adjustment of showerheads, toilets, faucet aerators, and pressure regulators for single-family and multi-family residential units constructed before 1992. This program has been in place since 2004 at an expense to the City of more than $1.55 million. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 57  Water-Wise Landscaping Program. This program provides resources for designing and installing water- wise landscaping in San Luis Obispo County, selecting climate-appropriate plants, and irrigation and drainage improvements that will help residents improve their landscaping and protect the watershed.  Washing Machine Rebate. This program pays water customers a one-time rebate for the installation of a certified energy-efficient Tier 3 washing machine.  Mandatory Plumbing Retrofit. Upon change of ownership of any residential property, the seller must retrofit the property’s plumbing fixtures to meet defined low-water-use criteria.  Water Conservation Hotline. Pismo Beach In 2014, Pismo Beach introduced the first-in-the-state waterless urinal mandate and a 0.5-gallon per minute (gpm) restroom aerator retrofit requirement. The components of this program include the following:  Waterless urinal retrofits. All existing urinals in the City were retrofitted to waterless urinals before February 14, 2016.  Faucet aerators. New residential restroom construction requires faucets that are fitted with aerators that emit no more than 0.5 gpm. Restroom faucets in all publicly accessible restrooms, including those in hotel rooms, lobbies and restrooms, restaurants, schools, commercial and retail buildings, public buildings, and similar publicly accessible restrooms were retrofitted to install aerators that emit no more than 0.5 gpm.  Sub-meters in new construction. All new multi-unit buildings, regardless of proposed use, were required to have a separate sub-meter capable of measuring the water use of every usable unit, separate common space, and landscaping that is expected to use at least 25 gallons of water per day on average for the course of a year, regardless of the overall size of the building. Buildings that have a separate water meter for each unit are exempt. Also in 2014, Pismo Beach adopted several Water Conservation Incentive Programs to help reduce water consumption and ensure reliable future water supply. On February 16, 2016, the Pismo Beach City Council updated the Water Conservation Incentive Programs list to include:  Cash for Grass. This program reimburses residents for each square foot of lawn removed (minimum 300 square feet) and replaced with drought-tolerant landscaping, which is required to have drip or micro-spray irrigation and be on an automatic timer.  Free Catch Bucket Program. This program gives residents one free shower catch bucket for capturing unused shower water and re-purposing it for irrigation or utility purposes.  Rain Barrel Rebate Program. This program reimburses residents up to $100 ($50 per rain barrel) when up to two rain barrels are purchased and installed to use rainwater, conserve potable water, and reduce stormwater runoff.  Water-Wise Landscaping Program. This program provides resources for designing and installing water- wise landscaping in San Luis Obispo County, selecting climate-appropriate plants, and irrigation and drainage improvements that will help residents improve their landscaping and protect the watershed.  High Efficiency Toilet Rebate Program. This program provides a one-time rebate for each 3.5-gallon-per- flush or higher toilet replaced with a 1.28-gallon-per-flush or lower toilet.  Water Conservation Hotline. In January, 2017, Pismo Beach adopted an updated schedule of development impact fees to include new recycled water fees for all new development, redevelopment, and additions to existing buildings that create FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 58 additional dwelling units or additional non-residential floor area, to help fund the cost of the Central Coast Blue project. In June, 2017, in response to the State of California action to lift the drought emergency and State mandated water use restrictions throughout the state, Pismo Beach declared a “Normal Water Supply” and adopted an Urgency Ordinance O-2017-003, revising the restrictions associated with each water supply status to conform to State mandates. The restrictions for a Normal Water Supply include the following:  Use of water that causes runoff onto adjacent properties, non-irrigated areas, private and public walkways, roadways, gutters, parking lots or structures is prohibited.  Outdoor water use for washing vehicles, boats, paved surfaces, buildings, and similar uses shall be attended and have hand-controlled water devices, which shut off the water immediately when not in use.  No water will be used for cleaning driveways, patios, parking lots, sidewalks, streets, or other such uses except as found necessary by the city to protect the public health or safety.  Outdoor Irrigation:  Outdoor irrigation is prohibited between 10 a.m. and 4 p.m.  Applying water to outdoor landscapes during and within 48 hours following measurable precipitation is prohibited.  Restaurants will serve drinking water only in response to a specific request by a customer.  Using water in a fountain or other decorative water feature, except where the water is part of a recirculating system, is prohibited.  The use of outdoor irrigation during, and 48 hours following, measurable precipitation is prohibited. Grover Beach Between 2011 and 2014, Grover Beach declared Stage I and Stage II water shortage conditions and implemented conservation measures including public outreach and education and voluntary prohibitions on water use. In June 2014, Grover Beach declared a Stage III Water Shortage that required all water customers to reduce their water usage by 10 percent. Many of the prohibitions that had previously been voluntary since declaration of the Stage II Water Shortage Declaration became mandatory with the Stage III declaration. The declaration also provided the City with the authority to impose penalties for failure to comply with the water reduction or use prohibitions. The Stage III Water Shortage declaration, with associated prohibitions, continued throughout 2019. These prohibitions include the following:  Washing of sidewalks, driveways, or roadways where air blowers or sweeping provides a reasonable alternative.  Refilling of private pools except to maintain water levels.  Planting of turf and other new landscaping, unless it consists of drought-tolerant plants.  Washing vehicles, boats, etc. without a quick-acting shut-off nozzle on the hose.  Washing any exterior surfaces unless using a quick-acting shut-off nozzle on the hose.  Restaurant water service, unless requested.  Use of potable water for construction purposes, unless no other source of water or method can be used.  Operation of ornamental fountain or car wash unless water is re-circulated. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 59 As of January 2020, Grover Beach is considering making changes to its water conservation program that would be incorporated into a Water Shortage Contingency Plan (WSCP),14 enacted when water supplies are insufficient to support demand. As droughts and other events impacting water supply occur more frequently and intensely, the WSCP helps prepare for and respond to water shortages. The proposed changes include six stages of action tied to actual water shortage conditions in 10 percent increments. Each stage relates a supply reduction range to an associated demand reduction target, which may vary based on the nature of Triggering Conditions that are dependent on the cause, severity, and anticipated duration of the water supply shortage. If adopted, the Grover Beach city staff would continuously monitor the availability of water supply sources15 and, if one or more set of triggering conditions were met, the Public Works Director would notify the City Council and recommend declaration of the appropriate stage of water shortage. In addition to mandatory water use prohibitions, Grover Beach has implemented water conservation incentive programs including the following:  Cash for Grass Rebate Program  Smart Irrigation Controller and Sensor Rebate Program  Toilet Fixture, Showerhead, and Sink Aerator Retrofit Rebate Program  Washing Machine Rebate Program Oceano CSD Given the population of its service area, OCSD is not required to prepare an UWMP or reduce water consumption as mandated by the Governor for urban water suppliers. Outdoor water use restrictions have been adopted, as required. In April 2015, OCSD adopted a rate increase that included tiered rates to promote water conservation. These tiered rates remain in effect, but were reduced in July 2017, upon adoption of the Post Drought Consumption Charges and Supplemental Water Charge Ordinance. OCSD pumped only 16 percent of its groundwater allotment in 2019 and is utilizing Lopez Lake surplus water in addition to its Lopez Lake allocation. Meanwhile, OCSD’s conservation efforts continue to exceed the Governor’s drought-mandated goal (since rescinded) of 25 percent. Overall consumption has declined to approximately 79 gallons per capita daily (gpcd) after the implementation of drought conservation rates, illustrating that, as a disadvantaged community, it is responding effectively to conservation rates. OCSD’s demand is less than its annual allocation of SWP water, preserving local supplies if needed in subsequent years, depending on SWP deliveries. In the event that SWP deliveries are decreased to a level that is insufficient to meet OCSD demand, then mandatory conservation efforts will be implemented to match the available supply. If the supply is less than the s55 gpcd needed to meet health and safety needs, then the supply shortfall will be supplemented from Lopez Lake supplies. Current SWP reliability analyses prepared by the DWR illustrate a low probability that SWP water will not be able to meet OCSD demands in any two consecutive years. Additional strategies exist in the event of temporary non-delivery of SWP and Lopez Lake water and other unforeseen circumstances. Post-drought strategies include resumption of groundwater pumping, resumption of Lopez Lake deliveries, and storage of SWP water as provided in SWP contracts. 14 The WSCP is a required component of the City of Grover Beach’s updated 2020 UWMP, currently under development for submission to the State this summer. 15 Including monitoring of Lopez Lake supplies and monitoring of groundwater availability based on the Deep Well Index as compared with its threshold value of 7.5 feet NAVD 88. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 60 7.1.8 Evaluate Alternative Sources of Supply Strategies:  Evaluate expanded use of recycled water, including implementation of Central Coast Blue.  Analyze the capacity of the Lopez Lake and Coastal Branch pipelines to maximize deliveries of surface water. The following analyses have been completed:  Lopez Lake Pipeline Capacity Evaluation (WSC, 2011a)  Lopez Lake Pipeline Capacity Re-Evaluation (WSC, 2011b)  Coastal Branch Capacity Assessment (WSC, 2011a)  Lopez Bypass and State Water Delivery Evaluation (WSC, 2017)  Optimize existing surface water supplies, including surface water storage, through the development of a framework for interagency exchanges and transfers, including SWP and Lopez Lake supplies.  Maximize Lopez Lake pipeline capacity. Discussion: The NCMA agencies continue to evaluate alternative sources of water supply that could provide a more reliable and sustainable water supply for the NCMA. An expanded portfolio of water supply sources will support sustainable management of the groundwater resource and help to reduce the risk of water shortages. These alternative sources include the following:  State Water Project. OCSD and Pismo Beach are currently SWP customers. Both agencies increased their SWP allocations by securing “drought buffers” to increase the availability of supply during periods of SWP shortfalls. Grover Beach and Arroyo Grande are not SWP customers. However, Arroyo Grande approved a measure in 2016 authorizing the City to purchase SWP water from the SLOFCWCD’s excess allotment on a temporary basis and only during a declared local water emergency. To date, Arroyo Grande has not declared such an emergency and has not purchased SWP water.  Water Recycling. As discussed in Section 7.1.5, Pismo Beach and the SSLOCSD both prepared RWFPSs to evaluate alternatives for a recycled water program that could provide a supplemental water supply source and improve the water supply reliability for the Pismo Beach and the SSLOCSD member agencies (Arroyo Grande, Grover Beach, and OCSD). Section 7.1.5 also describes ongoing efforts for Central Coast Blue that will enable the NCMA agencies to produce recycled water to augment their water supplies. Construction of the new facility will allow for the use of recycled water to recharge the groundwater basin and provide a new, drought-proof source of water supply for the area. As conceived, the project includes construction of a distribution system that will inject advanced purified water into the SMGB and will allow the NCMA agencies to increase recharge to the aquifer, improve water supply reliability, and help to prevent future occurrences of seawater intrusion.  Lopez Lake Expansion. In 2008, the County sponsored a preliminary assessment of the concept of installing an inflatable rubber dam at the Lopez Dam spillway. Subsequently, the SLOFCWCD CSA 12 and Arroyo Grande, Grover Beach, and Pismo Beach funded a study to further analyze the feasibility of increasing the yield of Lopez Lake by raising the spillway height with an inflatable dam or permanent extension. The study was finalized in 2013 and identified the potential to increase the annual yield from Lopez Lake by 500 AFY with a spillway height increase of 6 feet (Stetson, 2013). The NCMA agencies are continuing to evaluate other aspects of the project, including pipeline capacity and impacts on the HCP process. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 61  Desalination. In 2006, Arroyo Grande, Grover Beach, and OCSD used Proposition 50 funds to complete a feasibility study on desalination as an additional water supply option for the NCMA. This alternative supply is not considered to be a viable option at this time. When PG&E announced plans to close its Diablo Canyon Power Plant, previous efforts by the SLOFCWCD to (1) evaluate the potential to expand the existing desalination facility at the PG&E Diablo Canyon Power Plant and (2) connect it to the Lopez Lake pipeline to provide a supplemental water supply for the Zone 3 agencies were terminated.  Nacimiento Pipeline Extension. In 2006, Arroyo Grande, Grover Beach, and OCSD completed an evaluation of a Nacimiento pipeline extension to determine the feasibility of delivery of water from the Nacimiento reservoir to the NCMA. This alternative supply is not considered to be a viable option at this time. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 62 SECTION 8: References Allen, R.G., Pereira, L.S., Raes, D., and Smith, M. 1998. Crop evapotranspiration- Guidelines for computing crop water requirements: Food and Agriculture Organization of the United Nations, Irrigation and Drainage Paper 56, 300p. California Department of Water Resources (DWR). 1958. San Luis Obispo County Investigation, Bulletin No. 18, vol. 1 and 2. California Department of Water Resources (DWR). 1970. Sea-Water Intrusion: Pismo-Guadalupe Area. Bulletin No. 63-3, 76 p. California Department of Water Resources (DWR). 1975. Sea-Water Intrusion in California, Inventory of Coastal Ground Water Basins, Bulletin No. 63-5. California Department of Water Resources (DWR). 1979. Ground Water in the Arroyo Grande Area, Southern District Report. California Department of Water Resources (DWR). 2002. Water resources of the Arroyo Grande – Nipomo Mesa Area: Southern District Report. California Department of Water Resources (DWR). 2019. Sustainable Groundwater Management Act 2019 Basin Prioritization Process and Results. Prepared by the State of California Natural Resources Agency Department of Water Resources Sustainable Groundwater Management Program. California Department of Water Resources Bay Delta Office. 2016. IWFM Demand Calculator IDC 2015: Theoretical Documentation and User’s Manual. Central Valley Modeling Unit. Cal Poly. 2019. California Evapotranspiration Data for Irrigation District Water Balances, Irrigation Training & Research Center, San Luis Obispo, CA 93407-0730. Carollo Engineers. 2011. City of Pismo Beach 2010 Urban Water Management Plan. City of Arroyo Grande. 2017. Amended Final Draft, 2015 Urban Water Management Plan, City of Arroyo Grande. City of Grover Beach. 2010. City of Grover Beach 2010 Urban Water Management Plan. EDAW, Inc. August 1998. San Luis Obispo County Master Water Plan Update. Fugro Consultants, Inc. 2015. Santa Maria Groundwater Basin Characterization and Planning Activities Study, Final Report. Prepared for San Luis Obispo County Flood Control and Water Conservation District, December 30, 2015. GSI Water Solutions, Inc. (GSI) 2018. Santa Maria River Valley Groundwater Basin, Basin Boundary Modification Request Technical Report. Prepared for San Luis Obispo County Flood Control and Water Conservation District. Miller, G. A. and Evenson, R. E. 1966. Utilization of Groundwater in the Santa Maria Valley Area, California. USGS Water Supply Paper 1819-A. Mualem, Y. 1976. A new model for predicting the hydraulic conductivity of unsaturated porous media. Water Resources Res., 12, 513-522. Northern Cities Management Area. 2008. Annual Monitoring Report, prepared by Todd Engineers. April 2009. Northern Cities Management Area. 2009. Annual Monitoring Report, prepared by Todd Engineers. April 2010. Northern Cities Management Area. 2010. Annual Monitoring Report, prepared by GEI Consultants. April 2011. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 63 Northern Cities Management Area. 2011. Annual Monitoring Report, prepared by GEI Consultants. May 2012. Northern Cities Management Area. 2012. Annual Monitoring Report, prepared by GEI Consultants. April 2013. Northern Cities Management Area. 2013. Annual Monitoring Report, prepared by Fugro Consultants. April 2014. Northern Cities Management Area. 2014. Annual Monitoring Report, prepared by Fugro Consultants. April 2015. Northern Cities Management Area. 2015. Annual Monitoring Report, prepared by Fugro Consultants. April 2016. Northern Cities Management Area. 2016. Annual Monitoring Report, prepared by GSI Water Solutions, Inc. April 2017. Northern Cities Management Area. 2017. Annual Monitoring Report, prepared by GSI Water Solutions, Inc. April 2018. Northern Cities Management Area. 2018. Annual Monitoring Report, prepared by GSI Water Solutions, Inc. April 2019. Nipomo Mesa Management Area. 2010. 2nd Annual Report, Calendar Year 2009, prepared by the NMMA Technical Group, April 2010. Nipomo Mesa Management Area. 2011. 3rd Annual Report, Calendar Year 2010, prepared by the NMMA Technical Group, April 2011. Nipomo Mesa Management Area. 2012. 4th Annual Report, Calendar Year 2011, prepared by the NMMA Technical Group, April 2012. Nipomo Mesa Management Area. 2013. 5th Annual Report, Calendar Year 2012, prepared by the NMMA Technical Group, April 2013. Nipomo Mesa Management Area. 2014. 6th Annual Report, Calendar Year 2013, prepared by the NMMA Technical Group, April 2014. Nipomo Mesa Management Area. 2015. 7th Annual Report, Calendar Year 2014, prepared by the NMMA Technical Group, April 2015. Nipomo Mesa Management Area. 2016. 8th Annual Report, Calendar Year 2015, prepared by the NMMA Technical Group, April 2016. Nipomo Mesa Management Area, 9th Annual Report, Calendar Year 2016, prepared by the NMMA Technical Group, April 2017. Pacific Gas and Electric Company (PG&E). 2014. Central Coastal California Seismic Imaging Project (CCSIP), report to the California Public Utilities Commission. http://www.pge.com/en/safety/systemworks/dcpp/seismicsafety/report.page San Luis Obispo County (SLO Co). 2019. San Luis Obispo County Stormwater Resources Plan. Submitted to the State Water Resources Control Board on February 28, 2019. Stetson Engineers. 2013. Lopez Lake Spillway Raise Project Report. Todd Engineers. 2007. Water Balance Study for the Northern Cities Area. Todd Engineers. April 2007. Todd. Engineers. 2008. Monitoring Program for the Northern Cities Management Area. Todd Engineers, July 2008. FINAL | Northern Cities Management Area 2019 Annual Monitoring Report GSI Water Solutions, Inc. 64 Todd Engineers. 2010. Summary of Renovations for the Northern Cities Management Area Sentry Wells, San Luis Obispo County, California. U.S. Geological Survey. 2006. Quaternary fault and fold database for the United States. http://earthquake.usgs.gov/regional/qfaults van Genuchten, M.T. 1985. A Closed-form solution for predicting the conductivity of unsaturated soils. Soil Sci. Soc. Am. J., 44, 892-898. Wallace Group. 2010. Survey Report on the “Sentry” Well Elevation Establishment for Cities of Arroyo Grande, Grover Beach, Pismo Beach and the Oceano Community Services District. Water Systems Consulting, Inc. (WSC). 2011a. Capacity Assessment of the Coastal Branch, Chorro Valley, & Lopez Pipelines. Prepared by Water Systems Consulting, Inc. for the San Luis Obispo County Flood Control and Water Conservation District and the Central Coast Water Authority. Water Systems Consulting, Inc. (WSC). 2011b. Lopez Pipeline Re-Evaluation Technical Memorandum. Prepared by Water Systems Consulting, Inc. for the San Luis Obispo County Flood Control and Water Conservation District and the Central Coast Water Authority. Water Systems Consulting, Inc. (WSC). 2014. Final Draft Strategic Plan for the Northern Cities Management Area Technical Group, June 2014. Water Systems Consulting, Inc. (WSC). 2015. Recycled Water Facilities Planning Study – Final: prepared for the City of Pismo Beach, April 2015. Water Systems Consulting, Inc. (WSC). 2017. Lopez Bypass & State Water Delivery Evaluation. Prepared for the San Luis Obispo County Flood Control and Water Conservation District. Woodring, W.P and Bramlette, M.N. 1950. Geology and Paleontology of the Santa Maria District, California: U.S. Geological Survey, Professional Paper 222, 142 p. Worts, G.G., Jr. 1951. Geology and ground-water resources of the Santa Maria Valley area, California: U.S. Geological Survey Water-Supply Paper 1000, 176 p. FIGURES This page left blank intentionally. SantaMariaGuadalupe Nipomo ArroyoGrandeGroverBeach PismoBeach Orcutt NorthernCitiesManagementArea San L u i s O b i s p o C o u n t y Sant a B a r b a r a C o u n t y £¤101 Nipomo MesaManagementArea Santa MariaValleyManagement Area Date: January 28, 2020 Data Sources: LEGENDNorthern Cities Management AreaNipomo Mesa Management AreaSanta Maria Valley Management AreaSanta Maria Groundwater Basin (DWR 2019)County Borders Santa Maria Groundwater Basin FIGURE 1 Northern Cities Management AreaSan Luis Obispo County, California Document Path: Y:\0672_Northern_Cities_Management_Area\Source_Figures\006_2019_Annual_Report\Annual_Report\Figure01_Santa_Maria_Groundwater_Basin.mxd o 0 1 2 3 4 5 Miles PacificOcean GroverBeach ArroyoGrande Oceano PismoBeach £¤101 Santa Maria River FaultPismoCreekArroyoGrandeCreekMeadowCreek L o s B erros Creek Oceano Fault Wilmar Avenue Fault Date : Fe bru ary 2 6, 2 020 Data S ources: LEGEN DNorth ern C ities Management AreaNipomo Mesa Ma nagement AreaSanta Maria G roundwater Basin (DWR 2019)FaultsStreams Northern Cities Ma nagement Area FIGURE 2 Sa n L uis Obisp o C ounty, Califo rn ia Docum ent Path: Y:\_nonGISP\0672_Northern_Cities_Management_Area\Source_Figures\006_2019_Annual_Report\Annual_Report\Figure02_Northern_Cities_ManagementArea.mxd o 0 1 Miles Pa cificOcean !> !> !> !> !> !> !> County MW#3Well 12N/35W32C03 North Beach CampgroundWells 32S/12E-24B01, 02, 03 Highway 1Wells 32S/13E-30F01, 02, 03 Pier Avenue32S/13E-30N01, 02, 03 Oceano CSDObservation Wells(Green, Blue, Silver, and Yellow) Oceano DunesWells 12N/36W-36L01, 02 OceanoWellNo. 8 £¤101 Santa Maria River FaultPismoCreek A rroyoG ra nd e C re ekM eadow Cr eekL o s B erros Creek Oceano Fault Wilmar Avenue Fault Date : Fe bru ary 2 6, 2 020 Data S ources: LEGEN D !>NCMA Mo nitoring WellsNorthern C ities Management AreaFaultsStreams Loc ations of Monitoring W ells FIGURE 3 North ern C ities Man agemen t Are aSan L uis Obisp o C ounty, Califo rn ia Docum ent Path: Y:\_nonGISP\0672_Northern_Cities_Management_Area\Source_Figures\006_2019_Annual_Report\Annual_Report\Figure03_NCMA_Monitoring_Wells.mxd o 0 1 Miles Pa cificOcean DEPTHS OF MONITORING WELLS Northern Cities Management Area San Luis Obispo County, CaliforniaFIGURE 4P:\Portland\672-Northern Cities Management Area\005-2018 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 7 NCMA Depths of Monitoring Wells -700 -600 -500 -400 -300 -200 -100 0 Elevation, feet NAVD88Well Well Screen Transducer XD1.7 XD2.7 XD3.5 XD4.4 XD4.6 XD6.5 North Beach Campground 24B 01 02 03 Highway 1 30F 01 02 03 Pier Avenue 30N 01 02 03 Oceano Dunes 36L 01 02 OCSD Green Blue Silver Yellow 31H H10 H11 H12 H13 County MW#3 32C03 XD FIGURE 5P:\Portland\672-Northern Cities Management Area\006-2019 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 3 NCMA Precip 1950 - present Shaded.grf19501955196019651970197519801985199019952000 2005201020152020Calendar Year -20 -10 0 10 20 30 40 50 60 70 Cumulative Departure from Average, Inches0 10 20 30 40 50 Annual Precipitation, InchesDr o u g h t Dr o u g h t Average Precipitation 1950-2019: 15.7 Inches Wet PeriodAlternating Wet and Dry Years Wet PeriodWet PeriodANNUAL PRECIPITATION 1950 TO 2019 Northern Cities Management Area San Luis Obispo County, California &< &< &< ·|}þ1 ·|}þ1 Pismo Beach(DRI 046943 - DiscontinuedAugust 2017) Oceano(SLO 795) Nipomo(CIMIS 202) £¤101 Date: January 16, 2019 LEGEND &<Active Weather Station &<Inactive Weather Station Nipomo Mesa Management Area Northern Cities Management Area Santa Maria Valley Management Area Location of Precipitation Stations FIGURE 6 Northern Cities Management Area San Luis Obispo County, California Document Path: Y:\0672_Northern_Cities_Management_Area\Source_Figures\005_2018_Annual_Report\Figure_4_NCMA_Precipitation_Station_Locations.mxd o 0 1 Miles PacificOcean FIGURE 7 P:\Portland\672-Northern Cities Management Area\006-2019 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 5 NCMA Monthly Precip and Evap.grfP:\Portland\672-Northern Cities Management Area\005-2018 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 5 NCMA Monthly Precip and Evap MONTHLY AND AVERAGE PRECIPITATION AND EVAPOTRANSPIRATION Northern Cities Management Area San Luis Obispo County, California 1030 2030 O C E A N O F A U L T WI L M A R A V E N U E F A U L T SA N T A M A R I A R I V E R F A U L TPismoCreekArroyoGrandeCreekMeadowCr e e k LosBerrosCreek TarSpringCreek 101 603020105040304 0 5Date: January 30, 2020 Data Sources: SLO County, NCMA and NMMA Agencies LEGEND Municipal Well Sentry Well Alluvial Groundwater Contour (feet, NAVD88) Deep Groundwater Contour (feet, NAVD88) Fault All Other Features Northern Cities Management Area Alluvial Aquifer Extent Highway Watercourse Groundwater Elevation Contours Spring 2019 FIGURE 8 Northern Cities Management Area San Luis Obispo County, California Document Path: Y:\0672_Northern_Cities_Management_Area\Source_Figures\006_2019_Annual_Report\Annual_Report\new style\Figure08_NCMA_Water_Level_Contours_April_2019.mxd 0 1 MilesP A C I F I C O C E A N 20-101000SA N T A M A R I A R I V E R F A U L T O C E A N O F A U L T WI L M A R A V E N U E F A U L TPismoCreek Arroyo Grande Cre e kMeadowCr e e k LosBerrosCreek TarSpringCreek 101 5030201050 405 Date: January 30, 2020 Data Sources: SLO County, NCMA and NMMA Agencies LEGEND Municipal Well Sentry Well Alluvial Groundwater Contour (feet, NAVD88) Deep Groundwater Contour (feet, NAVD88) Fault All Other Features Northern Cities Management Area Alluvial Aquifer Extent Highway Watercourse FIGURE 9 Northern Cities Management Area San Luis Obispo County, California Document Path: Y:\0672_Northern_Cities_Management_Area\Source_Figures\006_2019_Annual_Report\Annual_Report\new style\Figure09_NCMA_Water_Level_Contours_Oct_2019.mxd 0 1 MilesP A C I F I C O C E A N Groundwater Elevation Contours Fall 2019 SELECTED HYDROGRAPHS Northern Cities Management Area San Luis Obispo County, CaliforniaFIGURE 101990 1995 2000 2005 2010 2015 2020 -20 -10 0 10 20 30 40 50 -20 -10 0 10 20 30 40 50 -20 -10 0 10 20 30 40 50 -20 -10 0 10 20 30 40 50 60 \\PDX\Projects\Portland\672-Northern Cities Management Area\006-2019 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 10 NCMA Selected Hydrographs Well -32D03 Well -32D11 Water Elevation, feet NAVD8832D03 and 32D11 28K02 30K03 33K03 SENTRY WELL HYDROGRAPHS Northern Cities Management Area San Luis Obispo County, CaliforniaFIGURE 111965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 0 5 10 15 200 5 10 15 200 5 10 15 200 5 10 15 20 \\PDX\Projects\Portland\672-Northern Cities Management Area\006-2019 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 11 NCMA Sentry Well Hydrographs Well -24B03 Well -24B02 Water Elevation, feet NAVD88North Beach Campground Highway 1 Pier Avenue Oceano Dunes Well -30F03 Well -30F02 Well -30N02 Well -30N03 Well -36L01 Well -36L02 Flowing Artesian Flowing Artesian Flowing Artesian HYDROGRAPH OF DEEP WELL INDEX ELEVATION Northern Cities Management Area San Luis Obispo County, CaliforniaFIGURE 121965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 -5-4-3-2-101234567891011121314151617181920Deep Well Index Elevation, feet NAVD88Deep Well Index Elevation (Wells -24B03, -30F03 and -30N02) 0 100 200 300 400 500 600 700 800 Chloride, mg/lWell -30N02 Well -24B03 Well -30F03 Deep Well Index Threshold: 7.5 feet Deep Well Index is the average of groundwater elevations in the deep wells of Sentry Well clusters 24B,30F, and 30N (See Figure 3 for locations of monitoring wells and Figure 4 for well depths). WATER ELEVATION, CONDUCTIVITY, AND TEMPERATURE, WELL 24B03 Northern Cities Management Area San Luis Obispo County, CaliforniaFIGURE 132011 2012 2013 2014 2015 2016 2017 2018 2019 -5-4-3-2-101234567891011121314151617181920Water Elevation, feet NAVD880 400 800 1,200 1,600 2,000 Sp. Cond.uS/cmWell -24B03 North Beach Campground Deep Well Well Depth: 435 feet (Careaga Sandstone) Deep Well Index 65 67 69 71 73 Temp.ºFDeep Well Index Threshold: 7.5 feet \\PDX\Projects\Portland\672-Northern Cities Management Area\006-2019 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 13 NCMA Well 24B03 WATER ELEVATION, CONDUCTIVITY, AND TEMPERATURE, WELL 30F03 Northern Cities Management Area San Luis Obispo County, CaliforniaFIGURE 142011 2012 2013 2014 2015 2016 2017 2018 2019 -5-4-3-2-101234567891011121314151617181920Water Elevation, feet NAVD880 400 800 1,200 1,600 2,000 Sp. Cond.uS/cmWell -30F03 Highway 1 Deep Well Well Depth: 372 feet (Careaga Sandstone) Deep Well Index 65 67 69 71 73 Temp.ºFDeep Well Index Threshold: 7.5 feet \\PDX\Projects\Portland\672-Northern Cities Management Area\006-2019 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 14 NCMA Well 30F03 WATER ELEVATION, CONDUCTIVITY, AND TEMPERATURE, WELL 30N02 Northern Cities Management Area San Luis Obispo County, CaliforniaFIGURE 15-5-4-3-2-101234567891011121314151617181920Water Elevation, feet NAVD882011 2012 2013 2014 2015 2016 2017 2018 2019 0 400 800 1,200 1,600 2,000 Sp. Cond.uS/cmWell -30N02 Pier Avenue Deep Well Well Depth: 255 feet (Paso Robles Formation) Deep Well Index 63 65 67 69 71 Temp.ºFP:\Portland\672-Northern Cities Management Area\006-2019 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 15 NCMA Well 30N02.grf Deep Well Index Threshold: 7.5 feet Sensor malfunction. Field measurements indicate that Sp. Cond. is stable WATER ELEVATION, CONDUCTIVITY, AND TEMPERATURE, WELL 36L01 Northern Cities Management Area San Luis Obispo County, CaliforniaFIGURE 162011 2012 2013 2014 2015 2016 2017 2018 2019 -5-4-3-2-101234567891011121314151617181920Water Elevation, feet NAVD880 400 800 1,200 1,600 2,000 Sp. Cond.uS/cmWell -36L01 Oceano Dunes Deep Well Well Depth: 237 feet (Paso Robles Formation) 65 67 69 71 73 Temp.ºF\\PDX\Projects\Portland\672-Northern Cities Management Area\006-2019 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 16 NCMA Well 36L01 WATER ELEVATION, CONDUCTIVITY, AND TEMPERATURE, WELL 36L02 Northern Cities Management Area San Luis Obispo County, CaliforniaFIGURE 172011 2012 2013 2014 2015 2016 2017 2018 2019 -5-4-3-2-101234567891011121314151617181920Water Elevation, feet NAVD880 400 800 1,200 1,600 2,000 Sp. Cond.uS/cmWell -36L02 Oceano Dunes Deep Well Well Depth: 545 feet (Careaga Sandstone) Well -36L02 Manual Measurements 65 67 69 71 73 Temp.ºFP:\Portland\672-Northern Cities Management Area\006-2019 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 17 NCMA Well 36L02.grf Transducer data corrupted Dashed where inferred Sensor malfunction after July 2019. Field measurements indicate that Sp. Cond. is stable WATER ELEVATION, CONDUCTIVITY, AND TEMPERATURE, WELL 32C03 Northern Cities Management Area San Luis Obispo County, CaliforniaFIGURE 182011 2012 2013 2014 2015 2016 2017 2018 2019 -4 -2 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 Water Elevation, feet NAVD880 400 800 1,200 1,600 2,000 Sp. Cond.uS/cm65 67 69 71 73 Temp.ºFWell 12N/35W-32C03 County Monitoring Well No. 3 Well Depth: 170 feet (Paso Robles Formation) \\PDX\Projects\Portland\672-Northern Cities Management Area\006-2019 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 18 NCMA Well 32C03 SA N T A M A R I A R I V E R F A U L T O C E A N O F A U L T WI L M A R A V E N U E F A U L TPismoCreek Arroyo Grande Cre e kMeadowCreek LosBerros Creek TarSpringCreek 101 1055005 Date: January 30, 2020 Data Sources: SLO County, NCMA and NMMA Agencies LEGEND Contour of Equal Difference in Water Level, feet Area of Net Decline Area of Net Rise All Other Features Northern Cities Management Area Fault Highway Watercourse FIGURE 19 Northern Cities Management Area San Luis Obispo County, California Document Path: Y:\0672_Northern_Cities_Management_Area\Source_Figures\006_2019_Annual_Report\Annual_Report\new style\Figure19_Water Level Change_April_2018_2019_Deep.mxd 0 1 MilesP A C I F I C O C E A N Change in Groundwater Elevation, Deep Aquifer SystemApril 2018 to April 2019 SA N T A M A R I A R I V E R F A U L T O C E A N O F A U L T WI L M A R A V E N U E F A U L TPismoCreek Arroyo Grande Cre e kMeadowCreek LosBerros Creek TarSpringCreek 101 105 5 5 Date: January 30, 2020 Data Sources: SLO County, NCMA and NMMA Agencies LEGEND Contour of Equal Difference in Water Level, feet Area of Net Decline Area of Net Rise All Other Features Northern Cities Management Area Fault Highway Watercourse FIGURE 20 Northern Cities Management Area San Luis Obispo County, California Document Path: Y:\0672_Northern_Cities_Management_Area\Source_Figures\006_2019_Annual_Report\Annual_Report\new style\Figure20_Water Level Change_April_2018_2019_Qal.mxd 0 1 MilesP A C I F I C O C E A N Change in Groundwater Elevation, Alluvial AquiferApril 2018 to April 2019 CHLORIDE CONCENTRATIONS IN MONITORING WELLS Northern Cities Management Area San Luis Obispo County, CaliforniaFIGURE 212009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 0 100 2000 100 2000 100 2000 100 200 P:\Portland\672-Northern Cities Management Area\006-2019 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 21 NCMA Chloride Grouped.grf Well -24B03 Well -24B02 Well -30F01-30F02 Well -30F03 Well -30N03 Well -30N02 Well -36L02 Well -36L01 Well -32C03Chloride Concentration, mg/lNorth Beach Campground Highway 1 Pier Avenue Oceano Dunes and 32C03 TOTAL DISSOLVED SOLIDS CONCENTRATIONS IN MONITORING WELLS Northern Cities Management Area San Luis Obispo County, CaliforniaFIGURE 222009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 0 500 1,000 1,5000 500 1,000 1,5000 500 1,000 1,5000 500 1,000 1,500 P:\Portland\672-Northern Cities Management Area\006-2019 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 22 NCMA TDS Grouped.grf Well -24B03 Well -24B02 Well -30F01Well -30F02 Well -30F03 Well -30N03 Well -30N02 Well -36L02 Well -36L01 Well -32C03Total Dissolved Solids Concentration, mg/lNorth Beach Campground Highway 1 Pier Avenue Oceano Dunes and 32C03 FIGURE 23 P:\Portland\672-Northern Cities Management Area\006-2019 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 23 NCMA Piper Diagram.grf100806040200Ca10080604020Na+K100 80 60 40 20 0 Mg020406080100Cl 100 80 60 40 20 0SO410080604020HCO3+CO38060402080604020Carbonate (CO3) + Bicarbonate (HCO3)Cal c i um (C a ) + M agne s ium (M g )Sulfate (SO4) + Chloride (Cl)Sodium (Na ) + Po ta s s ium (K ) Note: Data include "middle" and "deep" wells from 2019 quarterly sampling events. PIPER DIAGRAM OF WATER QUALITY IN SELECT MONITORING WELLS Northern Cities Management Area San Luis Obispo County, California !R !R!R!R!R !R !R!R!R!R!R!R!R !R !R!R!R !R !R £¤101 Santa Maria River FaultPismoCreekArroyoGrandeCr eekMeadow Cr eekL o s B erros Creek Oceano Fault Wilmar Avenue Fault Date : Fe bru ary 2 6, 2 020 Data S ources: LEGEND !R City of Arroyo Grande Well !R City of Grover Beach Well !R City of Pismo Beach Well !R Oceano Community Services District Well Northern Cities Management AreaFaultsStreams Loc ations of MunicipalProduction W ells FIGURE 24 North ern C ities Man agemen t Are aSan L uis Obisp o C ounty, Califo rn ia Docum ent Path: Y:\_nonGISP\0672_Northern_Cities_Management_Area\Source_Figures\006_2019_Annual_Report\Annual_Report\Figure24_Locations of Municipal Production Well.mxd o 0 1 Miles Pa cificOcean ARROYO GRANDEGROVER BEACH PISMO BEACH OCEANO Arr oyoGrandeCreekPismoCreekMeado wCr e e k Los BerrosCreek GovernorEdmundG Brown Coa s t al BranchCal i f o r n i a Aq u e d u ct 101 Date: January 30, 2020 Data Sources: LEGEND Avocado Rotational Crops Strawberry All Other Features Highway Watercourse Northern Cities Management NCMA Agricultural Land 2019 FIGURE 25 Northern Cities Management Area San Luis Obispo County, California Document Path: Y:\0672_Northern_Cities_Management_Area\Source_Figures\006_2019_Annual_Report\Annual_Report\new style\Figure25_NCMA Agricultural Land_2019.mxd 0 0.5 1 MilesP A C I F I C O C E A N 2019 ESTIMATED AGRICULTURAL WATER DEMAND AND MONTHLY PRECIPITATION AT THE SLO NO. 795 GAUGE Northern Cities Management Area San Luis Obispo County, CaliforniaFIGURE 26P:\Portland\672-Northern Cities Management Area\005-2018 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 24 2017 NCMA Estimated Agricultural Water Demand and Monthly Precipitation at the CIMIS Nipomo Station FIGURE 27P:\Portland\672-Northern Cities Management Area\006-2019 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 27 NCMA Municipal Water Use by Source.grf MUNICIPAL WATER USE BY SOURCE Northern Cities Management Area San Luis Obispo County, California TOTAL WATER USE (URBAN, RURAL, AG) BY SOURCE Northern Cities Management Area San Luis Obispo County, CaliforniaFIGURE 28P:\Portland\672-Northern Cities Management Area\005-2018 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 26 NCMA Total Water Use by Source FIGURE 291965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 0 500 1,000 1,500 2,000 2,500 TDS, mg/l20 40 60 80 100 120 140 160 180 200 Chloride, mg/l0 40 80 120 160 200 240 280 Sodium, mg/lWell -24B03 (Careaga) Well -30F03 (Careaga) Index Wells Well -30N02 (Paso Robles) Well -30N03 (Paso Robles) P:\Portland\672-Northern Cities Management Area\006-2019 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 29 NCMA TDS, Cl and Sodium Index Wells and 30N03.grf ) 30N02 Chloride >600 mg/l in 2009 HISTORICAL TDS, CHLORIDE AND SODIUM, INDEX WELLS AND 30N03 Northern Cities Management Area San Luis Obispo County, California FIGURE 301965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 0 500 1,000 1,500 2,000 2,500 TDS, mg/l20 40 60 80 100 120 140 160 180 200 Chloride, mg/l0 40 80 120 160 200 240 280 Sodium, mg/lWell -30N02 (Paso Robles) Well -31H11 (Blue; Paso Robles Formation) Well -36L01 (Paso Robles Formation) P:\Portland\672-Northern Cities Management Area\006-2019 Annual Report\03 Annual Report\0 Admin Draft\Figures\Parts Fig 30 NCMA TDS, Cl and Sodium Wells 30N02 MW-Blue and 36L01.grf HISTORICAL TDS, CHLORIDE AND SODIUM, WELLS 30N02, MW-BLUE AND 36L01 Northern Cities Management Area San Luis Obispo County, California APPENDIX A NCMA Monitoring Well Water Level and Water Quality Data This page left blank intentionally. Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/12E-24B01 North Beach Shallow Alluvium 10/9/2019 6.22 Stove Pipe Top of Steel 13.58 7.3632S/12E-24B01 North Beach Shallow Alluvium 7/9/2019 6.07Stove Pipe Top of Steel 13.587.5132S/12E-24B01 North Beach Shallow Alluvium 4/9/2019 7.18Stove Pipe Top of Steel 13.586.432S/12E-24B01 North Beach Shallow Alluvium 1/8/2019 5.95Stove Pipe Top of Steel 13.587.6332S/12E-24B01 North Beach Shallow Alluvium10/9/2018 6.29 Stove Pipe Top of Steel 13.58 7.2932S/12E-24B01 North Beach Shallow Alluvium7/10/2018 7.00 Stove Pipe Top of Steel 13.58 6.5832S/12E-24B01 North Beach Shallow Alluvium4/10/2018 6.48 Stove Pipe Top of Steel 13.58 7.1032S/12E-24B01 North Beach Shallow Alluvium1/10/2018 6.00 Stove Pipe Top of Steel 13.58 7.5832S/12E-24B01 North Beach Shallow Alluvium10/10/2017 6.12 Stove Pipe Top of Steel 13.58 7.4632S/12E-24B01 North Beach Shallow Alluvium7/11/2017 6.74 Stove Pipe Top of Steel 13.58 6.8432S/12E-24B01 North Beach Shallow Alluvium4/11/2017 6.30 Stove Pipe Top of Steel 13.58 7.2832S/12E-24B01 North Beach Shallow Alluvium1/10/2017 5.54 Stove Pipe Top of Steel 13.58 8.0432S/12E-24B01 North Beach Shallow Alluvium10/12/2016 6.54 Stove Pipe Top of Steel 13.58 7.0432S/12E-24B01 North Beach Shallow Alluvium7/19/2016 6.78 Stove Pipe Top of Steel 13.58 6.8032S/12E-24B01 North Beach Shallow Alluvium4/12/2016 6.35 Stove Pipe Top of Steel 13.58 7.2332S/12E-24B01 North Beach Shallow Alluvium1/12/2016 5.17 Stove Pipe Top of Steel 13.58 8.4132S/12E-24B01 North Beach Shallow Alluvium10/13/2015 5.73 Stove Pipe Top of Steel 13.58 7.8532S/12E-24B01 North Beach Shallow Alluvium7/14/2015 6.06 Stove Pipe Top of Steel 13.58 7.5232S/12E-24B01 North Beach Shallow Alluvium4/14/2015 6.22 Stove Pipe Top of Steel 13.58 7.3632S/12E-24B01 North Beach Shallow Alluvium1/13/2015 5.83 Stove Pipe Top of Steel 13.58 7.7532S/12E-24B01 North Beach Shallow Alluvium10/14/2014 5.76 Stove Pipe Top of Steel 13.58 7.8232S/12E-24B01 North Beach Shallow Alluvium7/29/2014 5.99 Stove Pipe Top of Steel 13.58 7.5932S/12E-24B01 North Beach Shallow Alluvium6/4/2014 6.52 Stove Pipe Top of Steel 13.58 7.0632S/12E-24B01 North Beach Shallow Alluvium4/15/2014 5.95 Stove Pipe Top of Steel 13.58 7.6332S/12E-24B01 North Beach Shallow Alluvium1/14/2014 5.75 Stove Pipe Top of Steel 13.58 7.8332S/12E-24B01 North Beach Shallow Alluvium10/14/2013 6.07 Stove Pipe Top of Steel 13.58 7.5132S/12E-24B01 North Beach Shallow Alluvium7/9/2013 6.09 Stove Pipe Top of Steel 13.58 7.4932S/12E-24B01 North Beach Shallow Alluvium4/10/2013 7.00 Stove Pipe Top of Steel 13.58 6.5832S/12E-24B01 North Beach Shallow Alluvium1/14/2013 5.72 Stove Pipe Top of Steel 13.58 7.8632S/12E-24B01 North Beach Shallow Alluvium10/29/2012 5.92 Stove Pipe Top of Steel 13.58 7.6632S/12E-24B01 North Beach Shallow Alluvium7/23/2012 5.79 Stove Pipe Top of Steel 13.58 7.7932S/12E-24B01 North Beach Shallow Alluvium4/18/2012 5.58 Stove Pipe Top of Steel 13.58 8.0032S/12E-24B01 North Beach Shallow Alluvium1/11/2012 5.72 Stove Pipe Top of Steel 13.58 7.8632S/12E-24B01 North Beach Shallow Alluvium11/21/2011 5.80 Stove Pipe Top of Steel 13.58 7.7832S/12E-24B01 North Beach Shallow Alluvium7/26/2011 6.38 Stove Pipe Top of Steel 13.58 7.2032S/12E-24B01 North Beach Shallow Alluvium4/20/2011 6.40 Stove Pipe Top of Steel 13.58 7.1832S/12E-24B01 North Beach Shallow Alluvium1/24/2011 5.78 Stove Pipe Top of Steel 13.58 7.8032S/12E-24B01 North Beach Shallow Alluvium10/21/2010 6.37 Stove Pipe Top of Steel 13.58 7.2132S/12E-24B01 North Beach Shallow Alluvium7/27/2010 6.48 Stove Pipe Top of Steel 13.58 7.132S/12E-24B01 North Beach Shallow Alluvium4/27/2010 3.84 Flush Top Flush Mount 10.70 6.8632S/12E-24B01 North Beach Shallow Alluvium1/27/2010 3.13 Flush Top Flush Mount 10.70 7.5732S/12E-24B01 North Beach Shallow Alluvium10/19/2009 2.28 Flush Top Flush Mount 10.70 8.4232S/12E-24B01 North Beach Shallow Alluvium8/20/2009 3.25 Flush Top Flush Mount 10.70 7.4532S/12E-24B01 North Beach Shallow Alluvium5/12/2009 3.58 Flush Top Flush Mount 10.70 7.1232S/12E-24B01 North Beach Shallow Alluvium4/7/2009 1.61 Flush Top Flush Mount 11.70 10.09P:\Portland\672‐Northern Cities Management Area\006‐2019 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx4/22/2020 Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/12E-24B02 North Beach Middle Paso Robles 10/9/20196.52 Stove Pipe Top of Steel 13.58 7.0632S/12E-24B02 North Beach Middle Paso Robles 7/9/20196.40 Stove Pipe Top of Steel 13.58 7.1832S/12E-24B02 North Beach Middle Paso Robles 4/9/20196.50 Stove Pipe Top of Steel 13.58 7.0832S/12E-24B02 North Beach Middle Paso Robles 1/8/20196.00 Stove Pipe Top of Steel 13.58 7.5832S/12E-24B02 North Beach Middle Paso Robles10/9/2018 6.65 Stove Pipe Top of Steel 13.58 6.9332S/12E-24B02 North Beach Middle Paso Robles7/10/2018 7.17 Stove Pipe Top of Steel 13.58 6.4132S/12E-24B02 North Beach Middle Paso Robles4/10/2018 6.02 Stove Pipe Top of Steel 13.58 7.5632S/12E-24B02 North Beach Middle Paso Robles1/10/2018 5.57 Stove Pipe Top of Steel 13.58 8.0132S/12E-24B02 North Beach Middle Paso Robles10/10/2017 6.46 Stove Pipe Top of Steel 13.58 7.1232S/12E-24B02 North Beach Middle Paso Robles7/11/2017 6.93 Stove Pipe Top of Steel 13.58 6.6532S/12E-24B02 North Beach Middle Paso Robles4/11/2017 6.26 Stove Pipe Top of Steel 13.58 7.3232S/12E-24B02 North Beach Middle Paso Robles1/10/2017 5.33 Stove Pipe Top of Steel 13.58 8.2532S/12E-24B02 North Beach Middle Paso Robles10/12/2016 7.05 Stove Pipe Top of Steel 13.58 6.5332S/12E-24B02 North Beach Middle Paso Robles7/19/2016 7.61 Stove Pipe Top of Steel 13.58 5.9732S/12E-24B02 North Beach Middle Paso Robles4/12/2016 6.37 Stove Pipe Top of Steel 13.58 7.2132S/12E-24B02 North Beach Middle Paso Robles1/12/2016 5.51 Stove Pipe Top of Steel 13.58 8.0732S/12E-24B02 North Beach Middle Paso Robles10/13/2015 6.61 Stove Pipe Top of Steel 13.58 6.9732S/12E-24B02 North Beach Middle Paso Robles7/14/2015 6.97 Stove Pipe Top of Steel 13.58 6.6132S/12E-24B02 North Beach Middle Paso Robles4/14/2015 7.13 Stove Pipe Top of Steel 13.58 6.4532S/12E-24B02 North Beach Middle Paso Robles1/13/2015 6.28 Stove Pipe Top of Steel 13.58 7.3032S/12E-24B02 North Beach Middle Paso Robles10/14/2014 6.61 Stove Pipe Top of Steel 13.58 6.9732S/12E-24B02 North Beach Middle Paso Robles7/29/2014 7.05 Stove Pipe Top of Steel 13.58 6.5332S/12E-24B02 North Beach Middle Paso Robles6/4/2014 8.25 Stove Pipe Top of Steel 13.58 5.3332S/12E-24B02 North Beach Middle Paso Robles4/15/2014 6.55 Stove Pipe Top of Steel 13.58 7.0332S/12E-24B02 North Beach Middle Paso Robles1/14/2014 6.34 Stove Pipe Top of Steel 13.58 7.2432S/12E-24B02 North Beach Middle Paso Robles10/14/2013 7.08 Stove Pipe Top of Steel 13.58 6.5032S/12E-24B02 North Beach Middle Paso Robles7/9/2013 7.17 Stove Pipe Top of Steel 13.58 6.4132S/12E-24B02 North Beach Middle Paso Robles4/10/2013 6.33 Stove Pipe Top of Steel 13.58 7.2532S/12E-24B02 North Beach Middle Paso Robles1/14/2013 5.61 Stove Pipe Top of Steel 13.58 7.9732S/12E-24B02 North Beach Middle Paso Robles10/29/2012 5.88 Stove Pipe Top of Steel 13.58 7.732S/12E-24B02 North Beach Middle Paso Robles7/23/2012 6.12 Stove Pipe Top of Steel 13.58 7.4632S/12E-24B02 North Beach Middle Paso Robles4/18/2012 5.48 Stove Pipe Top of Steel 13.58 8.132S/12E-24B02 North Beach Middle Paso Robles1/11/2012 5.47 Stove Pipe Top of Steel 13.58 8.1132S/12E-24B02 North Beach Middle Paso Robles11/21/2011 5.69 Stove Pipe Top of Steel 13.58 7.8932S/12E-24B02 North Beach Middle Paso Robles7/26/2011 6.51 Stove Pipe Top of Steel 13.58 7.0732S/12E-24B02 North Beach Middle Paso Robles4/20/2011 6.30 Stove Pipe Top of Steel 13.58 7.2832S/12E-24B02 North Beach Middle Paso Robles1/24/2011 5.69 Stove Pipe Top of Steel 13.58 7.8932S/12E-24B02 North Beach Middle Paso Robles10/21/2010 6.79 Stove Pipe Top of Steel 13.58 6.7932S/12E-24B02 North Beach Middle Paso Robles7/27/2010 7.05 Stove Pipe Top of Steel 13.58 6.5332S/12E-24B02 North Beach Middle Paso Robles4/27/2010 4.34 Flush Top Flush Mount 10.70 6.3632S/12E-24B02 North Beach Middle Paso Robles1/27/2010 3.38 Flush Top Flush Mount 10.70 7.3232S/12E-24B02 North Beach Middle Paso Robles10/19/2009 2.26 Flush Top Flush Mount 10.70 8.4432S/12E-24B02 North Beach Middle Paso Robles8/20/2009 4.09 Flush Top Flush Mount 10.70 6.6132S/12E-24B02 North Beach Middle Paso Robles5/12/2009 4.74 Flush Top Flush Mount 10.70 5.96P:\Portland\672‐Northern Cities Management Area\006‐2019 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx4/22/2020 Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/12E-24B03 North Beach Deep Careaga 10/9/20193.36 Stove Pipe Top of Steel 13.58 10.2232S/12E-24B03 North Beach Deep Careaga 7/9/20193.39 Stove Pipe Top of Steel 13.58 10.1932S/12E-24B03 North Beach Deep Careaga 4/9/20193.08 Stove Pipe Top of Steel 13.58 10.5032S/12E-24B03 North Beach Deep Careaga 1/8/20193.12 Stove Pipe Top of Steel 13.58 10.4632S/12E-24B03 North Beach Deep Careaga10/9/2018 3.80 Stove Pipe Top of Steel 13.58 9.7832S/12E-24B03 North Beach Deep Careaga7/10/2018 4.18 Stove Pipe Top of Steel 13.58 9.4032S/12E-24B03 North Beach Deep Careaga4/10/2018 2.55 Stove Pipe Top of Steel 13.58 11.0332S/12E-24B03 North Beach Deep Careaga1/10/2018 2.51 Stove Pipe Top of Steel 13.58 11.0732S/12E-24B03 North Beach Deep Careaga10/10/2017 3.60 Stove Pipe Top of Steel 13.58 9.9832S/12E-24B03 North Beach Deep Careaga7/11/2017 3.75 Stove Pipe Top of Steel 13.58 9.8332S/12E-24B03 North Beach Deep Careaga4/11/2017 2.90 Stove Pipe Top of Steel 13.58 10.6832S/12E-24B03 North Beach Deep Careaga1/10/2017 2.59 Stove Pipe Top of Steel 13.58 10.9932S/12E-24B03 North Beach Deep Careaga10/12/2016 4.70 Stove Pipe Top of Steel 13.58 8.8832S/12E-24B03 North Beach Deep Careaga7/19/2016 5.10 Stove Pipe Top of Steel 13.58 8.4832S/12E-24B03 North Beach Deep Careaga4/12/2016 3.81 Stove Pipe Top of Steel 13.58 9.7732S/12E-24B03 North Beach Deep Careaga1/12/2016 3.01 Stove Pipe Top of Steel 13.58 10.5732S/12E-24B03 North Beach Deep Careaga10/13/2015 4.62 Stove Pipe Top of Steel 13.58 8.9632S/12E-24B03 North Beach Deep Careaga7/14/2015 4.76 Stove Pipe Top of Steel 13.58 8.8232S/12E-24B03 North Beach Deep Careaga4/14/2015 4.86 Stove Pipe Top of Steel 13.58 8.7232S/12E-24B03 North Beach Deep Careaga1/13/2015 3.59 Stove Pipe Top of Steel 13.58 9.9932S/12E-24B03 North Beach Deep Careaga10/14/2014 4.60 Stove Pipe Top of Steel 13.58 8.9832S/12E-24B03 North Beach Deep Careaga7/29/2014 4.78 Stove Pipe Top of Steel 13.58 8.8032S/12E-24B03 North Beach Deep Careaga6/4/2014 7.33 Stove Pipe Top of Steel 13.58 6.2532S/12E-24B03 North Beach Deep Careaga5/5/2014 5.36 Stove Pipe Top of Steel 13.58 8.2232S/12E-24B03 North Beach Deep Careaga4/15/2014 3.94 Stove Pipe Top of Steel 13.58 9.6432S/12E-24B03 North Beach Deep Careaga1/14/2014 3.81 Stove Pipe Top of Steel 13.58 9.7732S/12E-24B03 North Beach Deep Careaga10/14/2013 4.50 Stove Pipe Top of Steel 13.58 9.0832S/12E-24B03 North Beach Deep Careaga7/9/2013 4.48 Stove Pipe Top of Steel 13.58 9.132S/12E-24B03 North Beach Deep Careaga4/10/2013 3.41 Stove Pipe Top of Steel 13.58 10.1732S/12E-24B03 North Beach Deep Careaga1/14/2013 2.48 Stove Pipe Top of Steel 13.58 11.132S/12E-24B03 North Beach Deep Careaga10/29/2012 3.01 Stove Pipe Top of Steel 13.58 10.5732S/12E-24B03 North Beach Deep Careaga7/23/2012 2.98 Stove Pipe Top of Steel 13.58 10.632S/12E-24B03 North Beach Deep Careaga4/18/2012 1.93 Stove Pipe Top of Steel 13.58 11.6532S/12E-24B03 North Beach Deep Careaga1/12/2012 2.15 Stove Pipe Top of Steel 13.58 11.4332S/12E-24B03 North Beach Deep Careaga11/21/2011 2.93 Stove Pipe Top of Steel 13.58 10.6532S/12E-24B03 North Beach Deep Careaga7/26/2011 3.17 Stove Pipe Top of Steel 13.58 10.4132S/12E-24B03 North Beach Deep Careaga4/20/2011 3.25 Stove Pipe Top of Steel 13.58 10.3332S/12E-24B03 North Beach Deep Careaga1/24/2011 2.65 Stove Pipe Top of Steel 13.58 10.9332S/12E-24B03 North Beach Deep Careaga10/21/2010 4.60 Stove Pipe Top of Steel 13.58 8.9832S/12E-24B03 North Beach Deep Careaga7/27/2010 4.54 Stove Pipe Top of Steel 13.58 9.0432S/12E-24B03 North Beach Deep Careaga4/27/2010 1.43 Flush Top Flush Mount 10.70 9.2732S/12E-24B03 North Beach Deep Careaga1/27/2010 0.94 Flush Top Flush Mount 10.70 9.7632S/12E-24B03 North Beach Deep Careaga10/19/2009 0.81 Flush Top Flush Mount 10.70 9.8932S/12E-24B03 North Beach Deep Careaga8/19/2009 4.18 Flush Top Flush Mount 10.70 6.5232S/12E-24B03 North Beach Deep Careaga5/12/2009 3.18 Flush Top Flush Mount 10.70 7.52P:\Portland\672‐Northern Cities Management Area\006‐2019 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx4/22/2020 Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles 10/9/201914.78 Stove Pipe Top of Steel 23.16 8.3832S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles 7/9/201913.60 Stove Pipe Top of Steel 23.16 9.5632S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles 4/9/201913.03 Stove Pipe Top of Steel 23.16 10.1332S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles 1/8/201914.54 Stove Pipe Top of Steel 23.16 8.6232S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles10/9/2018 15.23 Stove Pipe Top of Steel 23.16 7.9332S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles7/10/2018 14.81 Stove Pipe Top of Steel 23.16 8.3532S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles4/10/2018 14.03 Stove Pipe Top of Steel 23.16 9.1332S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles1/10/2018 14.40 Stove Pipe Top of Steel 23.16 8.7632S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles10/10/2017 14.65 Stove Pipe Top of Steel 23.16 8.5132S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles7/11/2017 13.73 Stove Pipe Top of Steel 23.16 9.4332S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles4/11/2017 13.25 Stove Pipe Top of Steel 23.16 9.9132S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles1/10/2017 13.99 Stove Pipe Top of Steel 23.16 9.1732S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles10/12/2016 17.08 Stove Pipe Top of Steel 23.16 6.0832S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles7/19/2016 16.42 Stove Pipe Top of Steel 23.16 6.7432S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles4/12/2016 14.83 Stove Pipe Top of Steel 23.16 8.3332S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles1/12/2016 15.00 Stove Pipe Top of Steel 23.16 8.1632S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles10/13/2015 17.11 Stove Pipe Top of Steel 23.16 6.0532S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles7/14/2015 16.93 Stove Pipe Top of Steel 23.16 6.2332S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles4/14/2015 16.01 Stove Pipe Top of Steel 23.16 7.1532S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles1/13/2015 15.41 Stove Pipe Top of Steel 23.16 7.7532S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles10/14/2014 17.05 Stove Pipe Top of Steel 23.16 6.1132S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles7/29/2014 17.11 Stove Pipe Top of Steel 23.16 6.0532S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles6/4/2014 16.82 Stove Pipe Top of Steel 23.16 6.3432S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles4/15/2014 15.56 Stove Pipe Top of Steel 23.16 7.6032S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles1/14/2014 16.58 Stove Pipe Top of Steel 23.16 6.5832S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles10/14/2013 17.07 Stove Pipe Top of Steel 23.16 6.0932S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles7/9/2013 16.17 Stove Pipe Top of Steel 23.16 6.9932S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles4/10/2013 14.58 Stove Pipe Top of Steel 23.16 8.5832S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles1/14/2013 14.36 Stove Pipe Top of Steel 23.16 8.832S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles10/30/2012 14.95 Stove Pipe Top of Steel 23.16 8.2132S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles7/24/2012 14.00 Stove Pipe Top of Steel 23.16 9.1632S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles4/18/2012 13.42 Stove Pipe Top of Steel 23.16 9.7432S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles1/10/2012 13.80 Stove Pipe Top of Steel 23.16 9.3632S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles11/21/2011 13.78 Stove Pipe Top of Steel 23.16 9.3832S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles7/26/2011 13.50 Stove Pipe Top of Steel 23.16 9.6632S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles4/20/2011 12.82 Stove Pipe Top of Steel 23.16 10.3432S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles1/24/2011 13.33 Stove Pipe Top of Steel 23.16 9.8332S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles10/21/2010 16.55 Stove Pipe Top of Steel 23.16 6.6132S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles7/26/2010 15.68 Stove Pipe Top of Steel 23.16 7.4832S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles4/27/2010 11.02 Stove Pipe Top of Steel 23.16 12.1432S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles1/28/2010 12.73 Stove Pipe Top of Steel 23.16 10.4332S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles10/19/2009 14.33 Stove Pipe Top of Steel 23.16 8.8332S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles8/19/2009 14.34 Stove Pipe Top of Steel 23.16 8.8232S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles5/12/2009 12.38 Stove Pipe Top of Steel 23.16 10.7832S/13E-30F01 Highway 1 Shallow Alluvium / Paso Robles4/7/2009 11.67 Stove Pipe Top of Steel 24.16 12.49P:\Portland\672‐Northern Cities Management Area\006‐2019 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx4/22/2020 Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/13E-30F02 Highway 1 Middle Paso Robles 10/9/201915.55 Stove Pipe Top of Steel 23.16 7.6132S/13E-30F02 Highway 1 Middle Paso Robles 7/9/201914.90 Stove Pipe Top of Steel 23.16 8.2632S/13E-30F02 Highway 1 Middle Paso Robles 4/9/201914.87 Stove Pipe Top of Steel 23.16 8.2932S/13E-30F02 Highway 1 Middle Paso Robles 1/8/201915.11 Stove Pipe Top of Steel 23.16 8.0532S/13E-30F02 Highway 1 Middle Paso Robles10/9/2018 15.94 Stove Pipe Top of Steel 23.16 7.2232S/13E-30F02 Highway 1 Middle Paso Robles7/10/2018 15.90 Stove Pipe Top of Steel 23.16 7.2632S/13E-30F02 Highway 1 Middle Paso Robles4/10/2018 14.62 Stove Pipe Top of Steel 23.16 8.5432S/13E-30F02 Highway 1 Middle Paso Robles1/10/2018 14.79 Stove Pipe Top of Steel 23.16 8.3732S/13E-30F02 Highway 1 Middle Paso Robles10/10/2017 15.45 Stove Pipe Top of Steel 23.16 7.7132S/13E-30F02 Highway 1 Middle Paso Robles7/11/2017 15.30 Stove Pipe Top of Steel 23.16 7.8632S/13E-30F02 Highway 1 Middle Paso Robles4/11/2017 14.27 Stove Pipe Top of Steel 23.16 8.8932S/13E-30F02 Highway 1 Middle Paso Robles1/10/2017 14.53 Stove Pipe Top of Steel 23.16 8.6332S/13E-30F02 Highway 1 Middle Paso Robles10/12/2016 17.35 Stove Pipe Top of Steel 23.16 5.8132S/13E-30F02 Highway 1 Middle Paso Robles7/19/2016 17.63 Stove Pipe Top of Steel 23.16 5.5332S/13E-30F02 Highway 1 Middle Paso Robles4/12/2016 15.98 Stove Pipe Top of Steel 23.16 7.1832S/13E-30F02 Highway 1 Middle Paso Robles1/12/2016 15.29 Stove Pipe Top of Steel 23.16 7.8732S/13E-30F02 Highway 1 Middle Paso Robles10/13/2015 17.29 Stove Pipe Top of Steel 23.16 5.8732S/13E-30F02 Highway 1 Middle Paso Robles7/14/2015 17.44 Stove Pipe Top of Steel 23.16 5.7232S/13E-30F02 Highway 1 Middle Paso Robles4/14/2015 16.94 Stove Pipe Top of Steel 23.16 6.2232S/13E-30F02 Highway 1 Middle Paso Robles1/13/2015 16.41 Stove Pipe Top of Steel 23.16 6.7532S/13E-30F02 Highway 1 Middle Paso Robles10/14/2014 17.33 Stove Pipe Top of Steel 23.16 5.8332S/13E-30F02 Highway 1 Middle Paso Robles7/29/2014 17.31 Stove Pipe Top of Steel 23.16 5.8532S/13E-30F02 Highway 1 Middle Paso Robles6/4/2014 18.00 Stove Pipe Top of Steel 23.16 5.1632S/13E-30F02 Highway 1 Middle Paso Robles4/15/2014 16.27 Stove Pipe Top of Steel 23.16 6.8932S/13E-30F02 Highway 1 Middle Paso Robles1/14/2014 17.01 Stove Pipe Top of Steel 23.16 6.1532S/13E-30F02 Highway 1 Middle Paso Robles10/14/2013 17.52 Stove Pipe Top of Steel 23.16 5.6432S/13E-30F02 Highway 1 Middle Paso Robles7/9/2013 17.15 Stove Pipe Top of Steel 23.16 6.0132S/13E-30F02 Highway 1 Middle Paso Robles4/10/2013 15.76 Stove Pipe Top of Steel 23.16 7.432S/13E-30F02 Highway 1 Middle Paso Robles1/14/2013 15.01 Stove Pipe Top of Steel 23.16 8.1532S/13E-30F02 Highway 1 Middle Paso Robles10/30/2012 15.27 Stove Pipe Top of Steel 23.16 7.8932S/13E-30F02 Highway 1 Middle Paso Robles7/24/2012 14.82 Stove Pipe Top of Steel 23.16 8.3432S/13E-30F02 Highway 1 Middle Paso Robles4/18/2012 14.38 Stove Pipe Top of Steel 23.16 8.7832S/13E-30F02 Highway 1 Middle Paso Robles1/12/2012 14.31 Stove Pipe Top of Steel 23.16 8.8532S/13E-30F02 Highway 1 Middle Paso Robles11/21/2011 14.94 Stove Pipe Top of Steel 23.16 8.2232S/13E-30F02 Highway 1 Middle Paso Robles7/26/2011 14.46 Stove Pipe Top of Steel 23.16 8.732S/13E-30F02 Highway 1 Middle Paso Robles4/20/2011 14.23 Stove Pipe Top of Steel 23.16 8.9332S/13E-30F02 Highway 1 Middle Paso Robles1/24/2011 14.36 Stove Pipe Top of Steel 23.16 8.8032S/13E-30F02 Highway 1 Middle Paso Robles10/21/2010 7.39 Stove Pipe Top of Steel 23.16 15.7732S/13E-30F02 Highway 1 Middle Paso Robles7/26/2010 16.21 Stove Pipe Top of Steel 23.16 6.9532S/13E-30F02 Highway 1 Middle Paso Robles4/27/2010 12.14 Flush Top Flush Mount 20.36 8.2232S/13E-30F02 Highway 1 Middle Paso Robles1/28/2010 13.09 Flush Top Flush Mount 20.36 7.2732S/13E-30F02 Highway 1 Middle Paso Robles10/19/2009 14.36 Flush Top Flush Mount 20.36 6.0032S/13E-30F02 Highway 1 Middle Paso Robles8/19/2009 14.81 Flush Top Flush Mount 20.36 5.5532S/13E-30F02 Highway 1 Middle Paso Robles5/12/2009 14.34 Flush Top Flush Mount 20.36 6.0232S/13E-30F02 Highway 1 Middle Paso Robles4/7/2009 12.28 Flush Top Flush Mount 20.36 8.08P:\Portland\672‐Northern Cities Management Area\006‐2019 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx4/22/2020 Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/13E-30F03 Highway 1 Deep Careaga 10/9/201914.40 Stove Pipe Top of Steel 23.16 8.7632S/13E-30F03 Highway 1 Deep Careaga 7/9/201913.38 Stove Pipe Top of Steel 23.16 9.7832S/13E-30F03 Highway 1 Deep Careaga 4/9/201912.55 Stove Pipe Top of Steel 23.16 10.6132S/13E-30F03 Highway 1 Deep Careaga 1/8/201914.27 Stove Pipe Top of Steel 23.16 8.8932S/13E-30F03 Highway 1 Deep Careaga10/9/2018 15.48 Stove Pipe Top of Steel 23.16 7.6832S/13E-30F03 Highway 1 Deep Careaga7/10/2018 16.11 Stove Pipe Top of Steel 23.16 7.0532S/13E-30F03 Highway 1 Deep Careaga4/10/2018 12.16 Stove Pipe Top of Steel 23.16 11.0032S/13E-30F03 Highway 1 Deep Careaga1/10/2018 12.85 Stove Pipe Top of Steel 23.16 10.3132S/13E-30F03 Highway 1 Deep Careaga10/10/2017 14.70 Stove Pipe Top of Steel 23.16 8.4632S/13E-30F03 Highway 1 Deep Careaga7/11/2017 13.64 Stove Pipe Top of Steel 23.16 9.5232S/13E-30F03 Highway 1 Deep Careaga4/11/2017 12.36 Stove Pipe Top of Steel 23.16 10.8032S/13E-30F03 Highway 1 Deep Careaga1/10/2017 14.25 Stove Pipe Top of Steel 23.16 8.9132S/13E-30F03 Highway 1 Deep Careaga10/12/2016 17.82 Stove Pipe Top of Steel 23.16 5.3432S/13E-30F03 Highway 1 Deep Careaga7/19/2016 17.22 Stove Pipe Top of Steel 23.16 5.9432S/13E-30F03 Highway 1 Deep Careaga4/12/2016 14.90 Stove Pipe Top of Steel 23.16 8.2632S/13E-30F03 Highway 1 Deep Careaga1/12/2016 14.84 Stove Pipe Top of Steel 23.16 8.3232S/13E-30F03 Highway 1 Deep Careaga10/13/2015 18.87 Stove Pipe Top of Steel 23.16 4.2932S/13E-30F03 Highway 1 Deep Careaga7/14/2015 18.87 Stove Pipe Top of Steel 23.16 4.2932S/13E-30F03 Highway 1 Deep Careaga4/14/2015 17.92 Stove Pipe Top of Steel 23.16 5.2432S/13E-30F03 Highway 1 Deep Careaga1/13/2015 14.13 Stove Pipe Top of Steel 23.16 9.0332S/13E-30F03 Highway 1 Deep Careaga10/14/2014 18.98 Stove Pipe Top of Steel 23.16 4.1832S/13E-30F03 Highway 1 Deep Careaga7/29/2014 18.62 Stove Pipe Top of Steel 23.16 4.5432S/13E-30F03 Highway 1 Deep Careaga6/4/2014 22.27 Stove Pipe Top of Steel 23.16 0.8932S/13E-30F03 Highway 1 Deep Careaga5/5/2014 21.34 Stove Pipe Top of Steel 23.16 1.8232S/13E-30F03 Highway 1 Deep Careaga4/15/2014 16.14 Stove Pipe Top of Steel 23.16 7.0232S/13E-30F03 Highway 1 Deep Careaga1/14/2014 15.35 Stove Pipe Top of Steel 23.16 7.8132S/13E-30F03 Highway 1 Deep Careaga10/14/2013 17.30 Stove Pipe Top of Steel 23.16 5.8632S/13E-30F03 Highway 1 Deep Careaga7/9/2013 16.61 Stove Pipe Top of Steel 23.16 6.5532S/13E-30F03 Highway 1 Deep Careaga4/10/2013 14.69 Stove Pipe Top of Steel 23.16 8.4732S/13E-30F03 Highway 1 Deep Careaga1/14/2013 12.62 Stove Pipe Top of Steel 23.16 10.5432S/13E-30F03 Highway 1 Deep Careaga10/30/2012 14.61 Stove Pipe Top of Steel 23.16 8.5532S/13E-30F03 Highway 1 Deep Careaga7/24/2012 14.50 Stove Pipe Top of Steel 23.16 8.6632S/13E-30F03 Highway 1 Deep Careaga4/18/2012 10.43 Stove Pipe Top of Steel 23.16 12.7332S/13E-30F03 Highway 1 Deep Careaga1/12/2012 12.37 Stove Pipe Top of Steel 23.16 10.7932S/13E-30F03 Highway 1 Deep Careaga11/21/2011 13.24 Stove Pipe Top of Steel 23.16 9.9232S/13E-30F03 Highway 1 Deep Careaga7/26/2011 14.22 Stove Pipe Top of Steel 23.16 8.9432S/13E-30F03 Highway 1 Deep Careaga4/20/2011 12.51 Stove Pipe Top of Steel 23.16 10.6532S/13E-30F03 Highway 1 Deep Careaga1/24/2011 12.67 Stove Pipe Top of Steel 23.16 10.4932S/13E-30F03 Highway 1 Deep Careaga10/21/2010 6.62 Stove Pipe Top of Steel 23.16 16.5432S/13E-30F03 Highway 1 Deep Careaga7/26/2010 17.32 Stove Pipe Top of Steel 23.16 5.8432S/13E-30F03 Highway 1 Deep Careaga4/27/2010 11.38 Flush Top Flush Mount 20.36 8.9832S/13E-30F03 Highway 1 Deep Careaga1/28/2010 10.98 Flush Top Flush Mount 20.36 9.3832S/13E-30F03 Highway 1 Deep Careaga10/19/2009 14.18 Flush Top Flush Mount 20.36 6.1832S/13E-30F03 Highway 1 Deep Careaga8/19/2009 20.23 Flush Top Flush Mount 20.36 0.1332S/13E-30F03 Highway 1 Deep Careaga5/12/2009 17.68 Flush Top Flush Mount 20.36 2.68P:\Portland\672‐Northern Cities Management Area\006‐2019 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx4/22/2020 Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/13E-30N01 Pier Ave Shallow Alluvium 10/9/20199.63 Stove Pipe Top of Steel 16.13 6.5032S/13E-30N01 Pier Ave Shallow Alluvium 7/9/20199.25 Stove Pipe Top of Steel 16.13 6.8832S/13E-30N01 Pier Ave Shallow Alluvium 4/9/20198.91 Stove Pipe Top of Steel 16.13 7.2232S/13E-30N01 Pier Ave Shallow Alluvium 1/8/20198.60 Stove Pipe Top of Steel 16.13 7.5332S/13E-30N01 Pier Ave Shallow Alluvium10/9/2018 9.35 Stove Pipe Top of Steel 16.13 6.7832S/13E-30N01 Pier Ave Shallow Alluvium7/10/2018 9.46 Stove Pipe Top of Steel 16.13 6.6732S/13E-30N01 Pier Ave Shallow Alluvium4/10/2018 9.04 Stove Pipe Top of Steel 16.13 7.0932S/13E-30N01 Pier Ave Shallow Alluvium1/10/2018 8.97 Stove Pipe Top of Steel 16.13 7.1632S/13E-30N01 Pier Ave Shallow Alluvium10/10/2017 9.35 Stove Pipe Top of Steel 16.13 6.7832S/13E-30N01 Pier Ave Shallow Alluvium7/11/2017 9.00 Stove Pipe Top of Steel 16.13 7.1332S/13E-30N01 Pier Ave Shallow Alluvium4/11/2017 8.70 Stove Pipe Top of Steel 16.13 7.4332S/13E-30N01 Pier Ave Shallow Alluvium1/10/2017 7.89 Stove Pipe Top of Steel 16.13 8.2432S/13E-30N01 Pier Ave Shallow Alluvium10/12/2016 10.21 Stove Pipe Top of Steel 16.13 5.9232S/13E-30N01 Pier Ave Shallow Alluvium7/19/2016 9.91 Stove Pipe Top of Steel 16.13 6.2232S/13E-30N01 Pier Ave Shallow Alluvium4/12/2016 8.93 Stove Pipe Top of Steel 16.13 7.2032S/13E-30N01 Pier Ave Shallow Alluvium1/12/2016 8.73 Stove Pipe Top of Steel 16.13 7.4032S/13E-30N01 Pier Ave Shallow Alluvium10/13/2015 10.11 Stove Pipe Top of Steel 16.13 6.0232S/13E-30N01 Pier Ave Shallow Alluvium7/14/2015 9.91 Stove Pipe Top of Steel 16.13 6.2232S/13E-30N01 Pier Ave Shallow Alluvium4/14/2015 9.51 Stove Pipe Top of Steel 16.13 6.6232S/13E-30N01 Pier Ave Shallow Alluvium1/13/2015 9.03 Stove Pipe Top of Steel 16.13 7.1032S/13E-30N01 Pier Ave Shallow Alluvium10/14/2014 9.95 Stove Pipe Top of Steel 16.13 6.1832S/13E-30N01 Pier Ave Shallow Alluvium7/29/2014 9.88 Stove Pipe Top of Steel 16.13 6.2532S/13E-30N01 Pier Ave Shallow Alluvium6/4/2014 9.54 Stove Pipe Top of Steel 16.13 6.5932S/13E-30N01 Pier Ave Shallow Alluvium4/15/2014 9.17 Stove Pipe Top of Steel 16.13 6.9632S/13E-30N01 Pier Ave Shallow Alluvium1/14/2014 9.61 Stove Pipe Top of Steel 16.13 6.5232S/13E-30N01 Pier Ave Shallow Alluvium10/14/2013 9.86 Stove Pipe Top of Steel 16.13 6.2732S/13E-30N01 Pier Ave Shallow Alluvium7/9/2013 9.40 Stove Pipe Top of Steel 16.13 6.7332S/13E-30N01 Pier Ave Shallow Alluvium4/10/2013 8.98 Stove Pipe Top of Steel 16.13 7.1532S/13E-30N01 Pier Ave Shallow Alluvium1/14/2013 8.60 Stove Pipe Top of Steel 16.13 7.5332S/13E-30N01 Pier Ave Shallow Alluvium10/29/2012 8.96 Stove Pipe Top of Steel 16.13 7.1732S/13E-30N01 Pier Ave Shallow Alluvium7/23/2012 8.54 Stove Pipe Top of Steel 16.13 7.5932S/13E-30N01 Pier Ave Shallow Alluvium4/18/2012 8.53 Stove Pipe Top of Steel 16.13 7.6032S/13E-30N01 Pier Ave Shallow Alluvium1/9/2012 8.74 Stove Pipe Top of Steel 16.13 7.3932S/13E-30N01 Pier Ave Shallow Alluvium11/21/2011 8.78 Stove Pipe Top of Steel 16.13 7.3532S/13E-30N01 Pier Ave Shallow Alluvium7/26/2011 9.01 Stove Pipe Top of Steel 16.13 7.1232S/13E-30N01 Pier Ave Shallow Alluvium4/20/2011 8.59 Stove Pipe Top of Steel 16.13 7.5432S/13E-30N01 Pier Ave Shallow Alluvium1/24/2011 8.18 Stove Pipe Top of Steel 16.13 7.9532S/13E-30N01 Pier Ave Shallow Alluvium10/21/2010 9.99 Stove Pipe Top of Steel 16.13 6.1432S/13E-30N01 Pier Ave Shallow Alluvium7/27/2010 8.97 Stove Pipe Top of Steel 16.13 7.1632S/13E-30N01 Pier Ave Shallow Alluvium4/27/2010 6.14 Flush Top Flush Mount 13.53 7.3932S/13E-30N01 Pier Ave Shallow Alluvium1/26/2010 4.90 Flush Top Flush Mount 13.53 8.6332S/13E-30N01 Pier Ave Shallow Alluvium10/20/2009 6.53 Flush Top Flush Mount 13.53 7.0032S/13E-30N01 Pier Ave Shallow Alluvium8/20/2009 6.71 Flush Top Flush Mount 13.53 6.8232S/13E-30N01 Pier Ave Shallow Alluvium5/11/2009 6.03 Flush Top Flush Mount 13.53 7.5032S/13E-30N01 Pier Ave Shallow Alluvium4/7/2009 5.83 Flush Top Flush Mount 13.53 7.70P:\Portland\672‐Northern Cities Management Area\006‐2019 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx4/22/2020 Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/13E-30N03 Pier Ave Middle Paso Robles 10/9/20198.29 Stove Pipe Top of Steel 16.13 7.8432S/13E-30N03 Pier Ave Middle Paso Robles 7/9/20198.35 Stove Pipe Top of Steel 16.13 7.7832S/13E-30N03 Pier Ave Middle Paso Robles 4/9/20198.25 Stove Pipe Top of Steel 16.13 7.8832S/13E-30N03 Pier Ave Middle Paso Robles 1/8/20197.90 Stove Pipe Top of Steel 16.13 8.2332S/13E-30N03 Pier Ave Middle Paso Robles10/9/2018 8.37 Stove Pipe Top of Steel 16.13 7.7632S/13E-30N03 Pier Ave Middle Paso Robles7/10/2018 9.12 Stove Pipe Top of Steel 16.13 7.0132S/13E-30N03 Pier Ave Middle Paso Robles4/10/2018 7.50 Stove Pipe Top of Steel 16.13 8.6332S/13E-30N03 Pier Ave Middle Paso Robles1/10/2018 7.61 Stove Pipe Top of Steel 16.13 8.5232S/13E-30N03 Pier Ave Middle Paso Robles10/10/2017 8.61 Stove Pipe Top of Steel 16.13 7.5232S/13E-30N03 Pier Ave Middle Paso Robles7/11/2017 8.84 Stove Pipe Top of Steel 16.13 7.2932S/13E-30N03 Pier Ave Middle Paso Robles4/11/2017 7.55 Stove Pipe Top of Steel 16.13 8.5832S/13E-30N03 Pier Ave Middle Paso Robles1/10/2017 7.11 Stove Pipe Top of Steel 16.13 9.0232S/13E-30N03 Pier Ave Middle Paso Robles10/12/2016 10.13 Stove Pipe Top of Steel 16.13 6.0032S/13E-30N03 Pier Ave Middle Paso Robles7/19/2016 10.62 Stove Pipe Top of Steel 16.13 5.5132S/13E-30N03 Pier Ave Middle Paso Robles4/12/2016 9.21 Stove Pipe Top of Steel 16.13 6.9232S/13E-30N03 Pier Ave Middle Paso Robles1/12/2016 7.98 Stove Pipe Top of Steel 16.13 8.1532S/13E-30N03 Pier Ave Middle Paso Robles10/13/2015 10.48 Stove Pipe Top of Steel 16.13 5.6532S/13E-30N03 Pier Ave Middle Paso Robles7/14/2015 10.88 Stove Pipe Top of Steel 16.13 5.2532S/13E-30N03 Pier Ave Middle Paso Robles4/14/2015 11.88 Stove Pipe Top of Steel 16.13 4.2532S/13E-30N03 Pier Ave Middle Paso Robles1/13/2015 9.40 Stove Pipe Top of Steel 16.13 6.7332S/13E-30N03 Pier Ave Middle Paso Robles10/14/2014 10.52 Stove Pipe Top of Steel 16.13 5.6132S/13E-30N03 Pier Ave Middle Paso Robles7/29/2014 10.22 Stove Pipe Top of Steel 16.13 5.9132S/13E-30N03 Pier Ave Middle Paso Robles6/4/2014 11.33 Stove Pipe Top of Steel 16.13 4.8032S/13E-30N03 Pier Ave Middle Paso Robles4/15/2014 9.31 Stove Pipe Top of Steel 16.13 6.8232S/13E-30N03 Pier Ave Middle Paso Robles1/14/2014 10.26 Stove Pipe Top of Steel 16.13 5.8732S/13E-30N03 Pier Ave Middle Paso Robles10/14/2013 10.72 Stove Pipe Top of Steel 16.13 5.4132S/13E-30N03 Pier Ave Middle Paso Robles7/9/2013 10.36 Stove Pipe Top of Steel 16.13 5.7732S/13E-30N03 Pier Ave Middle Paso Robles4/10/2013 8.26 Stove Pipe Top of Steel 16.13 7.8732S/13E-30N03 Pier Ave Middle Paso Robles1/14/2013 7.71 Stove Pipe Top of Steel 16.13 8.4232S/13E-30N03 Pier Ave Middle Paso Robles10/29/2012 8.01 Stove Pipe Top of Steel 16.13 8.1232S/13E-30N03 Pier Ave Middle Paso Robles7/23/2012 9.15 Stove Pipe Top of Steel 16.13 6.9832S/13E-30N03 Pier Ave Middle Paso Robles4/18/2012 6.72 Stove Pipe Top of Steel 16.13 9.4132S/13E-30N03 Pier Ave Middle Paso Robles1/11/2012 7.17 Stove Pipe Top of Steel 16.13 8.9632S/13E-30N03 Pier Ave Middle Paso Robles11/21/2011 6.45 Stove Pipe Top of Steel 16.13 9.6832S/13E-30N03 Pier Ave Middle Paso Robles7/26/2011 7.59 Stove Pipe Top of Steel 16.13 8.5432S/13E-30N03 Pier Ave Middle Paso Robles4/20/2011 6.65 Stove Pipe Top of Steel 16.13 9.4832S/13E-30N03 Pier Ave Middle Paso Robles1/24/2011 6.68 Stove Pipe Top of Steel 16.13 9.4532S/13E-30N03 Pier Ave Middle Paso Robles10/21/2010 10.76 Stove Pipe Top of Steel 16.13 5.3732S/13E-30N03 Pier Ave Middle Paso Robles7/27/2010 9.53 Stove Pipe Top of Steel 16.13 6.6032S/13E-30N03 Pier Ave Middle Paso Robles4/27/2010 5.26 Flush Top Flush Mount 13.53 8.2732S/13E-30N03 Pier Ave Middle Paso Robles1/26/2010 5.88 Flush Top Flush Mount 13.53 7.6532S/13E-30N03 Pier Ave Middle Paso Robles10/20/2009 6.56 Flush Top Flush Mount 13.53 6.9732S/13E-30N03 Pier Ave Middle Paso Robles8/20/2009 7.50 Flush Top Flush Mount 13.53 6.0332S/13E-30N03 Pier Ave Middle Paso Robles5/12/2009 6.33 Flush Top Flush Mount 13.53 7.20P:\Portland\672‐Northern Cities Management Area\006‐2019 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx4/22/2020 Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/13E-30N02 Pier Ave Deep Paso Robles 10/9/201910.00 Stove Pipe Top of Steel 16.13 6.1332S/13E-30N02 Pier Ave Deep Paso Robles 7/9/20198.05 Stove Pipe Top of Steel 16.13 8.0832S/13E-30N02 Pier Ave Deep Paso Robles 4/9/20195.23 Stove Pipe Top of Steel 16.13 10.9032S/13E-30N02 Pier Ave Deep Paso Robles 1/8/20197.60 Stove Pipe Top of Steel 16.13 8.5332S/13E-30N02 Pier Ave Deep Paso Robles10/9/2018 10.77 Stove Pipe Top of Steel 16.13 5.3632S/13E-30N02 Pier Ave Deep Paso Robles7/10/2018 10.23 Stove Pipe Top of Steel 16.13 5.9032S/13E-30N02 Pier Ave Deep Paso Robles4/10/2018 5.96 Stove Pipe Top of Steel 16.13 10.1732S/13E-30N02 Pier Ave Deep Paso Robles1/10/2018 7.43 Stove Pipe Top of Steel 16.13 8.7032S/13E-30N02 Pier Ave Deep Paso Robles10/10/2017 10.40 Stove Pipe Top of Steel 16.13 5.7332S/13E-30N02 Pier Ave Deep Paso Robles7/11/2017 8.38 Stove Pipe Top of Steel 16.13 7.7532S/13E-30N02 Pier Ave Deep Paso Robles4/11/2017 5.35 Stove Pipe Top of Steel 16.13 10.7832S/13E-30N02 Pier Ave Deep Paso Robles1/10/2017 7.34 Stove Pipe Top of Steel 16.13 8.7932S/13E-30N02 Pier Ave Deep Paso Robles10/12/2016 13.44 Stove Pipe Top of Steel 16.13 2.6932S/13E-30N02 Pier Ave Deep Paso Robles7/19/2016 12.40 Stove Pipe Top of Steel 16.13 3.7332S/13E-30N02 Pier Ave Deep Paso Robles4/12/2016 8.57 Stove Pipe Top of Steel 16.13 7.5632S/13E-30N02 Pier Ave Deep Paso Robles1/12/2016 7.48 Stove Pipe Top of Steel 16.13 8.6532S/13E-30N02 Pier Ave Deep Paso Robles10/13/2015 14.14 Stove Pipe Top of Steel 16.13 1.9932S/13E-30N02 Pier Ave Deep Paso Robles7/14/2015 13.55 Stove Pipe Top of Steel 16.13 2.5832S/13E-30N02 Pier Ave Deep Paso Robles4/14/2015 10.02 Stove Pipe Top of Steel 16.13 6.1132S/13E-30N02 Pier Ave Deep Paso Robles1/13/2015 7.85 Stove Pipe Top of Steel 16.13 8.2832S/13E-30N02 Pier Ave Deep Paso Robles10/14/2014 13.69 Stove Pipe Top of Steel 16.13 2.4432S/13E-30N02 Pier Ave Deep Paso Robles7/29/2014 13.27 Stove Pipe Top of Steel 16.13 2.8632S/13E-30N02 Pier Ave Deep Paso Robles6/4/2014 15.20 Stove Pipe Top of Steel 16.13 0.9332S/13E-30N02 Pier Ave Deep Paso Robles5/5/2014 13.19 Stove Pipe Top of Steel 16.13 2.9432S/13E-30N02 Pier Ave Deep Paso Robles4/15/2014 8.57 Stove Pipe Top of Steel 16.13 7.5632S/13E-30N02 Pier Ave Deep Paso Robles1/14/2014 9.30 Stove Pipe Top of Steel 16.13 6.8332S/13E-30N02 Pier Ave Deep Paso Robles10/14/2013 12.13 Stove Pipe Top of Steel 16.13 4.0032S/13E-30N02 Pier Ave Deep Paso Robles7/9/2013 11.05 Stove Pipe Top of Steel 16.13 5.0832S/13E-30N02 Pier Ave Deep Paso Robles4/10/2013 7.06 Stove Pipe Top of Steel 16.13 9.0732S/13E-30N02 Pier Ave Deep Paso Robles1/14/2013 4.98 Stove Pipe Top of Steel 16.13 11.1532S/13E-30N02 Pier Ave Deep Paso Robles10/29/2012 8.52 Stove Pipe Top of Steel 16.13 7.6132S/13E-30N02 Pier Ave Deep Paso Robles7/23/2012 8.31 Stove Pipe Top of Steel 16.13 7.8232S/13E-30N02 Pier Ave Deep Paso Robles4/18/2012 3.45 Stove Pipe Top of Steel 16.13 12.6832S/13E-30N02 Pier Ave Deep Paso Robles1/11/2012 4.88 Stove Pipe Top of Steel 16.13 11.2532S/13E-30N02 Pier Ave Deep Paso Robles11/21/2011 5.35 Stove Pipe Top of Steel 16.13 10.7832S/13E-30N02 Pier Ave Deep Paso Robles7/26/2011 7.25 Stove Pipe Top of Steel 16.13 8.8832S/13E-30N02 Pier Ave Deep Paso Robles4/20/2011 3.53 Flush Top Flush Mount 13.53 10.0032S/13E-30N02 Pier Ave Deep Paso Robles1/24/2011 3.67 Flush Top Flush Mount 13.53 9.8632S/13E-30N02 Pier Ave Deep Paso Robles10/21/2010 10.42 Flush Top Flush Mount 13.53 3.1132S/13E-30N02 Pier Ave Deep Paso Robles7/27/2010 10.02 Flush Top Flush Mount 13.53 3.5132S/13E-30N02 Pier Ave Deep Paso Robles4/27/2010 6.14 Flush Top Flush Mount 13.53 7.3932S/13E-30N02 Pier Ave Deep Paso Robles2/25/2010 1.72 Flush Top Flush Mount 13.53 11.8132S/13E-30N02 Pier Ave Deep Paso Robles2/25/2010 1.72 Flush Top Flush Mount 13.53 11.8132S/13E-30N02 Pier Ave Deep Paso Robles1/26/2010 3.72 Flush Top Flush Mount 13.53 9.8132S/13E-30N02 Pier Ave Deep Paso Robles10/20/2009 7.38 Flush Top Flush Mount 13.53 6.1532S/13E-30N02 Pier Ave Deep Paso Robles8/20/2009 11.94 Flush Top Flush Mount 13.53 1.5932S/13E-30N02 Pier Ave Deep Paso Robles5/11/2009 6.98 Flush Top Flush Mount 13.53 6.55P:\Portland\672‐Northern Cities Management Area\006‐2019 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx4/22/2020 Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/13E-31H10 Oceano Green Paso Robles 10/9/201927.50 Manhole Top Flush Mount 34.63 7.1332S/13E-31H10 Oceano Green Paso Robles 7/9/201928.68 Manhole Top Flush Mount 34.63 5.9532S/13E-31H10 Oceano Green Paso Robles 4/9/201922.35 Manhole Top Flush Mount 34.63 12.2832S/13E-31H10 Oceano Green Paso Robles 1/8/201924.48 Manhole Top Flush Mount 34.63 10.1532S/13E-31H10 Oceano Green Paso Robles10/9/2018 27.35 Manhole Top Flush Mount 34.63 7.2832S/13E-31H10 Oceano Green Paso Robles7/10/2018 27.94 Manhole Top Flush Mount 34.63 6.6932S/13E-31H10 Oceano Green Paso Robles4/10/2018 24.15 Manhole Top Flush Mount 34.63 10.4832S/13E-31H10 Oceano Green Paso Robles1/10/2018 24.15 Manhole Top Flush Mount 34.63 10.4832S/13E-31H10 Oceano Green Paso Robles10/10/2017 26.53 Manhole Top Flush Mount 34.63 8.1032S/13E-31H10 Oceano Green Paso Robles7/11/2017 25.11 Manhole Top Flush Mount 34.63 9.5232S/13E-31H10 Oceano Green Paso Robles4/11/2017 21.98 Manhole Top Flush Mount 34.63 12.6532S/13E-31H10 Oceano Green Paso Robles1/10/2017 24.50 Manhole Top Flush Mount 34.63 10.1332S/13E-31H10 Oceano Green Paso Robles10/12/2016 30.74 Manhole Top Flush Mount 34.63 3.8932S/13E-31H10 Oceano Green Paso Robles7/19/2016 29.77 Manhole Top Flush Mount 34.63 4.8632S/13E-31H10 Oceano Green Paso Robles4/12/2016 25.64 Manhole Top Flush Mount 34.63 8.9932S/13E-31H10 Oceano Green Paso Robles1/12/2016 20.83 Manhole Top of Casing 30.49 9.6632S/13E-31H10 Oceano Green Paso Robles10/13/2015 31.88 Manhole Top Flush Mount 34.63 2.7532S/13E-31H10 Oceano Green Paso Robles7/14/2015 31.61 Manhole Top Flush Mount 34.63 3.0232S/13E-31H10 Oceano Green Paso Robles4/14/2015 28.81 Manhole Top Flush Mount 34.63 5.8232S/13E-31H10 Oceano Green Paso Robles1/13/2015 26.11 Manhole Top Flush Mount 34.63 8.5232S/13E-31H10 Oceano Green Paso Robles10/14/2014 31.64 Manhole Top Flush Mount 34.63 2.9932S/13E-31H10 Oceano Green Paso Robles7/29/2014 32.30 Manhole Top Flush Mount 34.63 2.3332S/13E-31H10 Oceano Green Paso Robles6/4/2014 32.82 Manhole Top Flush Mount 34.63 1.8132S/13E-31H10 Oceano Green Paso Robles4/15/2014 27.98 Manhole Top Flush Mount 34.63 6.6532S/13E-31H10 Oceano Green Paso Robles1/14/2014 28.55 Manhole Top Flush Mount 34.63 6.0832S/13E-31H10 Oceano Green Paso Robles10/14/2013 30.31 Manhole Top Flush Mount 34.63 4.3232S/13E-31H10 Oceano Green Paso Robles7/9/2013 29.98 Manhole Top Flush Mount 34.63 4.6532S/13E-31H10 Oceano Green Paso Robles4/10/2013 23.30 Manhole Top Flush Mount 34.63 11.3332S/13E-31H10 Oceano Green Paso Robles1/14/2013 23.59 Manhole Top Flush Mount 34.63 11.0432S/13E-31H10 Oceano Green Paso Robles10/30/2012 27.31 Manhole Top Flush Mount 34.63 7.3232S/13E-31H10 Oceano Green Paso Robles7/25/2012 27.15 Manhole Top Flush Mount 34.63 7.4832S/13E-31H10 Oceano Green Paso Robles4/18/2012 21.65 Manhole Top Flush Mount 34.63 12.9832S/13E-31H10 Oceano Green Paso Robles1/12/2012 23.29 Manhole Top Flush Mount 34.63 11.3432S/13E-31H10 Oceano Green Paso Robles11/21/2011 22.46 Manhole Top Flush Mount 34.63 12.1732S/13E-31H10 Oceano Green Paso Robles7/26/2011 25.51 Manhole Top Flush Mount 34.63 9.1232S/13E-31H10 Oceano Green Paso Robles4/20/2011 114.79 Manhole Top Flush Mount 34.63 -80.1632S/13E-31H10 Oceano Green Paso Robles1/24/2011 106.59 Manhole Top Flush Mount 34.63 -71.9632S/13E-31H10 Oceano Green Paso Robles10/21/2010 112.71 Manhole Top of Casing 30.49 -82.2232S/13E-31H10 Oceano Green Paso Robles7/26/2010 95.61 Manhole Top of Casing 30.49 -65.1232S/13E-31H10 Oceano Green Paso Robles4/26/2010 63.90 Manhole Top of Casing 30.49 -33.4132S/13E-31H10 Oceano Green Paso Robles1/27/2010 43.71 Manhole Top of Casing 30.49 -13.2232S/13E-31H10 Oceano Green Paso Robles10/20/2009 29.20 Manhole Top of Casing 30.49 1.2932S/13E-31H10 Oceano Green Paso Robles8/19/2009 24.55 Manhole Top of Casing 30.49 5.9432S/13E-31H10 Oceano Green Paso Robles4/7/2009 28.12 Manhole Top of Casing 30.49 2.37P:\Portland\672‐Northern Cities Management Area\006‐2019 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx4/22/2020 Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/13E-31H11 Oceano Blue Paso Robles 10/9/201928.31 Manhole Top Flush Mount 34.63 6.3232S/13E-31H11 Oceano Blue Paso Robles 7/9/201926.69 Manhole Top Flush Mount 34.63 7.9432S/13E-31H11 Oceano Blue Paso Robles 4/9/201922.61 Manhole Top Flush Mount 34.63 12.0232S/13E-31H11 Oceano Blue Paso Robles 1/8/201925.18 Manhole Top Flush Mount 34.63 9.4532S/13E-31H11 Oceano Blue Paso Robles10/9/2018 28.82 Manhole Top Flush Mount 34.63 5.8132S/13E-31H11 Oceano Blue Paso Robles7/10/2018 28.60 Manhole Top Flush Mount 34.63 6.0332S/13E-31H11 Oceano Blue Paso Robles4/10/2018 23.98 Manhole Top Flush Mount 34.63 10.6532S/13E-31H11 Oceano Blue Paso Robles1/10/2018 25.08 Manhole Top Flush Mount 34.63 9.5532S/13E-31H11 Oceano Blue Paso Robles10/10/2017 28.03 Manhole Top Flush Mount 34.63 6.632S/13E-31H11 Oceano Blue Paso Robles7/11/2017 26.18 Manhole Top Flush Mount 34.63 8.4532S/13E-31H11 Oceano Blue Paso Robles4/11/2017 21.90 Manhole Top Flush Mount 34.63 12.7332S/13E-31H11 Oceano Blue Paso Robles1/10/2017 25.00 Manhole Top Flush Mount 34.63 9.6332S/13E-31H11 Oceano Blue Paso Robles10/12/2016 30.74 Manhole Top Flush Mount 34.63 3.8932S/13E-31H11 Oceano Blue Paso Robles7/19/2016 29.62 Manhole Top Flush Mount 34.63 5.0132S/13E-31H11 Oceano Blue Paso Robles4/12/2016 25.13 Manhole Top Flush Mount 34.63 9.5032S/13E-31H11 Oceano Blue Paso Robles1/12/2016 22.00 Manhole Top of Casing 30.54 8.5432S/13E-31H11 Oceano Blue Paso Robles10/13/2015 32.70 Manhole Top Flush Mount 34.63 1.9332S/13E-31H11 Oceano Blue Paso Robles7/14/2015 32.21 Manhole Top Flush Mount 34.63 2.4232S/13E-31H11 Oceano Blue Paso Robles4/14/2015 28.41 Manhole Top Flush Mount 34.63 6.2232S/13E-31H11 Oceano Blue Paso Robles1/13/2015 25.98 Manhole Top Flush Mount 34.63 8.6532S/13E-31H11 Oceano Blue Paso Robles10/14/2014 32.70 Manhole Top Flush Mount 34.63 1.9332S/13E-31H11 Oceano Blue Paso Robles7/29/2014 32.69 Manhole Top Flush Mount 34.63 1.9432S/13E-31H11 Oceano Blue Paso Robles6/4/2014 34.02 Manhole Top Flush Mount 34.63 0.6132S/13E-31H11 Oceano Blue Paso Robles4/15/2014 27.07 Manhole Top Flush Mount 34.63 7.5632S/13E-31H11 Oceano Blue Paso Robles1/14/2014 27.86 Manhole Top Flush Mount 34.63 6.7732S/13E-31H11 Oceano Blue Paso Robles10/14/2013 30.98 Manhole Top Flush Mount 34.63 3.6532S/13E-31H11 Oceano Blue Paso Robles7/9/2013 29.36 Manhole Top Flush Mount 34.63 5.2732S/13E-31H11 Oceano Blue Paso Robles4/10/2013 24.45 Manhole Top Flush Mount 34.63 10.1832S/13E-31H11 Oceano Blue Paso Robles1/14/2013 23.14 Manhole Top Flush Mount 34.63 11.4932S/13E-31H11 Oceano Blue Paso Robles10/30/2012 27.68 Manhole Top Flush Mount 34.63 6.9532S/13E-31H11 Oceano Blue Paso Robles7/25/2012 27.18 Manhole Top Flush Mount 34.63 7.4532S/13E-31H11 Oceano Blue Paso Robles4/18/2012 20.10 Manhole Top Flush Mount 34.63 14.5332S/13E-31H11 Oceano Blue Paso Robles1/12/2012 22.26 Manhole Top Flush Mount 34.63 12.3732S/13E-31H11 Oceano Blue Paso Robles11/21/2011 22.73 Manhole Top Flush Mount 34.63 11.9032S/13E-31H11 Oceano Blue Paso Robles7/26/2011 25.29 Manhole Top Flush Mount 34.63 9.3432S/13E-31H11 Oceano Blue Paso Robles4/20/2011 22.59 Manhole Top Flush Mount 34.63 12.0432S/13E-31H11 Oceano Blue Paso Robles1/24/2011 24.87 Manhole Top Flush Mount 34.63 9.7632S/13E-31H11 Oceano Blue Paso Robles10/21/2010 30.11 Manhole Top of Casing 30.54 0.4332S/13E-31H11 Oceano Blue Paso Robles7/26/2010 24.74 Manhole Top of Casing 30.54 5.8032S/13E-31H11 Oceano Blue Paso Robles4/26/2010 18.52 Manhole Top of Casing 30.54 12.0232S/13E-31H11 Oceano Blue Paso Robles1/27/2010 22.06 Manhole Top of Casing 30.54 8.4832S/13E-31H11 Oceano Blue Paso Robles10/20/2009 27.50 Manhole Top of Casing 30.54 3.0432S/13E-31H11 Oceano Blue Paso Robles8/19/2009 24.65 Manhole Top of Casing 30.54 5.8932S/13E-31H11 Oceano Blue Paso Robles4/7/2009 27.65 Manhole Top of Casing 30.54 2.89P:\Portland\672‐Northern Cities Management Area\006‐2019 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx4/22/2020 Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/13E-31H12 Oceano Silver Careaga 10/9/201926.50 Manhole Top Flush Mount 34.63 8.1332S/13E-31H12 Oceano Silver Careaga 7/9/201924.59 Manhole Top Flush Mount 34.63 10.0432S/13E-31H12 Oceano Silver Careaga 4/9/201927.90 Manhole Top Flush Mount 34.63 6.7332S/13E-31H12 Oceano Silver Careaga 1/8/201928.15 Manhole Top Flush Mount 34.63 6.4832S/13E-31H12 Oceano Silver Careaga10/9/2018 39.15 Manhole Top Flush Mount 34.63 -4.5232S/13E-31H12 Oceano Silver Careaga7/10/2018 28.92 Manhole Top Flush Mount 34.63 5.7132S/13E-31H12 Oceano Silver Careaga4/10/2018 23.50 Manhole Top Flush Mount 34.63 11.1332S/13E-31H12 Oceano Silver Careaga1/10/2018 23.90 Manhole Top Flush Mount 34.63 10.7332S/13E-31H12 Oceano Silver Careaga10/10/2017 28.06 Manhole Top Flush Mount 34.63 6.5732S/13E-31H12 Oceano Silver Careaga7/11/2017 24.09 Manhole Top Flush Mount 34.63 10.5432S/13E-31H12 Oceano Silver Careaga4/11/2017 21.14 Manhole Top Flush Mount 34.63 13.4932S/13E-31H12 Oceano Silver Careaga1/10/2017 24.80 Manhole Top Flush Mount 34.63 9.8332S/13E-31H12 Oceano Silver Careaga10/12/2016 31.00 Manhole Top Flush Mount 34.63 3.6332S/13E-31H12 Oceano Silver Careaga7/19/2016 26.95 Manhole Top of Casing 30.48 3.5332S/13E-31H12 Oceano Silver Careaga4/12/2016 25.32 Manhole Top Flush Mount 34.63 9.3132S/13E-31H12 Oceano Silver Careaga1/12/2016 21.44 Manhole Top of Casing 30.48 9.0432S/13E-31H12 Oceano Silver Careaga10/13/2015 32.30 Manhole Top Flush Mount 34.63 2.3332S/13E-31H12 Oceano Silver Careaga7/14/2015 32.58 Manhole Top Flush Mount 34.63 2.0532S/13E-31H12 Oceano Silver Careaga4/14/2015 30.38 Manhole Top Flush Mount 34.63 4.2532S/13E-31H12 Oceano Silver Careaga1/13/2015 26.19 Manhole Top Flush Mount 34.63 8.4432S/13E-31H12 Oceano Silver Careaga10/14/2014 43.01 Manhole Top Flush Mount 34.63 -8.3832S/13E-31H12 Oceano Silver Careaga7/29/2014 33.65 Manhole Top Flush Mount 34.63 0.9832S/13E-31H12 Oceano Silver Careaga6/4/2014 36.33 Manhole Top Flush Mount 34.63 -1.7032S/13E-31H12 Oceano Silver Careaga4/15/2014 42.20 Manhole Top Flush Mount 34.63 -7.5732S/13E-31H12 Oceano Silver Careaga1/14/2014 27.78 Manhole Top Flush Mount 34.63 6.8532S/13E-31H12 Oceano Silver Careaga10/14/2013 30.92 Manhole Top Flush Mount 34.63 3.7132S/13E-31H12 Oceano Silver Careaga7/9/2013 30.91 Manhole Top Flush Mount 34.63 3.7232S/13E-31H12 Oceano Silver Careaga4/10/2013 26.08 Manhole Top Flush Mount 34.63 8.5532S/13E-31H12 Oceano Silver Careaga1/14/2013 23.12 Manhole Top Flush Mount 34.63 11.5132S/13E-31H12 Oceano Silver Careaga10/30/2012 27.14 Manhole Top Flush Mount 34.63 7.4932S/13E-31H12 Oceano Silver Careaga7/25/2012 27.68 Manhole Top Flush Mount 34.63 6.9532S/13E-31H12 Oceano Silver Careaga4/18/2012 20.13 Manhole Top Flush Mount 34.63 14.532S/13E-31H12 Oceano Silver Careaga1/11/2012 23.00 Manhole Top Flush Mount 34.63 11.6332S/13E-31H12 Oceano Silver Careaga11/21/2011 22.85 Manhole Top Flush Mount 34.63 11.7832S/13E-31H12 Oceano Silver Careaga7/26/2011 25.23 Manhole Top Flush Mount 34.63 9.432S/13E-31H12 Oceano Silver Careaga4/20/2011 21.27 Manhole Top Flush Mount 34.63 13.3632S/13E-31H12 Oceano Silver Careaga1/24/2011 22.02 Manhole Top Flush Mount 34.63 12.6132S/13E-31H12 Oceano Silver Careaga10/21/2010 29.11 Manhole Top Flush Mount 34.63 5.5232S/13E-31H12 Oceano Silver Careaga7/26/2010 24.24 Manhole Well Casing 30.48 6.2432S/13E-31H12 Oceano Silver Careaga4/26/2010 19.04 Manhole Well Casing 30.48 11.4432S/13E-31H12 Oceano Silver Careaga1/27/2010 21.05 Manhole Well Casing 30.48 9.4332S/13E-31H12 Oceano Silver Careaga10/20/2009 27.52 Manhole Well Casing 30.48 2.9632S/13E-31H12 Oceano Silver Careaga8/19/2009 29.34 Manhole Well Casing 30.48 1.1432S/13E-31H12 Oceano Silver Careaga4/7/2009 31.32 Manhole Well Casing 30.48 -0.84P:\Portland\672‐Northern Cities Management Area\006‐2019 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx4/22/2020 Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)32S/13E-31H13Oceano YellowCareaga 10/9/201926.35Manhole Top Flush Mount 34.638.2832S/13E-31H13Oceano YellowCareaga7/9/201924.47Manhole Top Flush Mount 34.6310.1632S/13E-31H13Oceano YellowCareaga4/9/201928.05Manhole Top Flush Mount 34.636.5832S/13E-31H13Oceano YellowCareaga1/8/201928.35Manhole Top Flush Mount 34.636.2832S/13E-31H13Oceano YellowCareaga10/9/2018 37.38Manhole Top Flush Mount 34.63-2.7532S/13E-31H13Oceano YellowCareaga7/10/2018 28.90Manhole Top Flush Mount 34.635.7332S/13E-31H13Oceano YellowCareaga4/10/2018 23.55Manhole Top Flush Mount 34.6311.0832S/13E-31H13Oceano YellowCareaga1/10/2018 23.85Manhole Top Flush Mount 34.6310.7832S/13E-31H13Oceano YellowCareaga10/10/2017 27.96Manhole Top Flush Mount 34.636.6732S/13E-31H13Oceano YellowCareaga7/11/2017 23.68Manhole Top Flush Mount 34.6310.9532S/13E-31H13Oceano YellowCareaga4/11/2017 21.18Manhole Top Flush Mount 34.6313.4532S/13E-31H13Oceano YellowCareaga1/10/2017 24.79Manhole Top Flush Mount 34.639.8432S/13E-31H13Oceano YellowCareaga10/12/2016 30.91Manhole Top Flush Mount 34.633.7232S/13E-31H13Oceano YellowCareaga7/19/2016 29.58Manhole Top Flush Mount 34.635.0532S/13E-31H13Oceano YellowCareaga4/12/2016 25.25Manhole Top Flush Mount 34.639.3832S/13E-31H13Oceano YellowCareaga1/12/2016 21.66Manhole Top of Casing 30.528.8632S/13E-31H13Oceano YellowCareaga10/13/2015 32.28Manhole Top Flush Mount 34.632.3532S/13E-31H13Oceano YellowCareaga7/14/2015 32.60Manhole Top Flush Mount 34.632.0332S/13E-31H13Oceano YellowCareaga4/14/2015 30.42Manhole Top Flush Mount 34.634.2132S/13E-31H13Oceano YellowCareaga1/13/2015 26.32Manhole Top Flush Mount 34.638.3132S/13E-31H13Oceano YellowCareaga10/14/2014 41.12Manhole Top Flush Mount 34.63-6.4932S/13E-31H13Oceano YellowCareaga7/29/2014 33.72Manhole Top Flush Mount 34.630.9132S/13E-31H13Oceano YellowCareaga6/4/2014 36.55Manhole Top Flush Mount 34.63-1.9232S/13E-31H13Oceano YellowCareaga4/15/2014 39.06Manhole Top Flush Mount 34.63-4.4332S/13E-31H13Oceano YellowCareaga1/14/2014 27.80Manhole Top Flush Mount 34.636.8332S/13E-31H13Oceano YellowCareaga10/14/2013 30.83Manhole Top Flush Mount 34.633.8032S/13E-31H13Oceano YellowCareaga7/9/2013 30.41Manhole Top Flush Mount 34.634.2232S/13E-31H13Oceano YellowCareaga4/10/2013 26.09Manhole Top Flush Mount 34.638.5432S/13E-31H13Oceano YellowCareaga1/14/2013 23.25Manhole Top Flush Mount 34.6311.3832S/13E-31H13Oceano YellowCareaga10/30/2012 27.23Manhole Top Flush Mount 34.637.4032S/13E-31H13Oceano YellowCareaga7/25/2012 27.69Manhole Top Flush Mount 34.636.9432S/13E-31H13Oceano YellowCareaga4/18/2012 20.05Manhole Top Flush Mount 34.6314.5832S/13E-31H13Oceano YellowCareaga1/12/2012 23.08Manhole Top Flush Mount 34.6311.5532S/13E-31H13Oceano YellowCareaga11/21/2011 22.98Manhole Top Flush Mount 34.6311.6532S/13E-31H13Oceano YellowCareaga7/26/2011 26.73Manhole Top Flush Mount 34.637.9032S/13E-31H13Oceano YellowCareaga4/20/2011 21.30Manhole Top Flush Mount 34.6313.3332S/13E-31H13Oceano YellowCareaga1/24/2011 22.01Manhole Top Flush Mount 34.6312.6232S/13E-31H13Oceano YellowCareaga10/21/2010 28.22Manhole Well Casing 30.522.3032S/13E-31H13Oceano YellowCareaga7/26/2010 25.50Manhole Well Casing 30.525.0232S/13E-31H13Oceano YellowCareaga4/26/2010 19.17Manhole Well Casing 30.5211.3532S/13E-31H13Oceano YellowCareaga1/27/2010 20.58Manhole Well Casing 30.529.9432S/13E-31H13Oceano YellowCareaga10/20/2009 25.80Manhole Well Casing 30.524.7232S/13E-31H13Oceano YellowCareaga8/19/2009 31.04Manhole Well Casing 30.52-0.5232S/13E-31H13Oceano YellowCareaga4/7/2009 34.78Manhole Well Casing 30.52-4.26P:\Portland\672‐Northern Cities Management Area\006‐2019 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx4/22/2020 Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)12N/36W-36L01 Oceano Dunes Middle Paso Robles 10/9/201920.85 Stove Pipe Top of Steel 26.77 5.9212N/36W-36L01 Oceano Dunes Middle Paso Robles 7/9/201920.39 Stove Pipe Top of Steel 26.77 6.3812N/36W-36L01 Oceano Dunes Middle Paso Robles 4/9/201919.93 Stove Pipe Top of Steel 26.77 6.8412N/36W-36L01 Oceano Dunes Middle Paso Robles 1/8/201919.00 Stove Pipe Top of Steel 26.77 7.7712N/36W-36L01 Oceano Dunes Middle Paso Robles10/9/2018 20.80 Stove Pipe Top of Steel 26.77 5.9712N/36W-36L01 Oceano Dunes Middle Paso Robles7/10/2018 20.74 Stove Pipe Top of Steel 26.77 6.0312N/36W-36L01 Oceano Dunes Middle Paso Robles4/10/2018 19.11 Stove Pipe Top of Steel 26.77 7.6612N/36W-36L01 Oceano Dunes Middle Paso Robles1/10/2018 19.32 Stove Pipe Top of Steel 26.77 7.4512N/36W-36L01 Oceano Dunes Middle Paso Robles10/10/2017 21.23 Stove Pipe Top of Steel 26.77 5.5412N/36W-36L01 Oceano Dunes Middle Paso Robles7/11/2017 21.59 Stove Pipe Top of Steel 26.77 5.1812N/36W-36L01 Oceano Dunes Middle Paso Robles4/11/2017 19.38 Stove Pipe Top of Steel 26.77 7.3912N/36W-36L01 Oceano Dunes Middle Paso Robles1/10/2017 19.70 Stove Pipe Top of Steel 26.77 7.0712N/36W-36L01 Oceano Dunes Middle Paso Robles10/12/2016 21.86 Stove Pipe Top of Steel 26.77 4.9112N/36W-36L01 Oceano Dunes Middle Paso Robles7/19/2016 22.21 Stove Pipe Top of Steel 26.77 4.5612N/36W-36L01 Oceano Dunes Middle Paso Robles4/12/2016 20.56 Stove Pipe Top of Steel 26.77 6.2112N/36W-36L01 Oceano Dunes Middle Paso Robles1/12/2016 18.76 Stove Pipe Top of Steel 26.77 8.0112N/36W-36L01 Oceano Dunes Middle Paso Robles10/13/2015 22.14 Stove Pipe Top of Steel 26.77 4.6312N/36W-36L01 Oceano Dunes Middle Paso Robles7/14/2015 21.84 Stove Pipe Top of Steel 26.77 4.9312N/36W-36L01 Oceano Dunes Middle Paso Robles4/14/2015 21.18 Stove Pipe Top of Steel 26.77 5.5912N/36W-36L01 Oceano Dunes Middle Paso Robles1/13/2015 19.89 Stove Pipe Top of Steel 26.77 6.8812N/36W-36L01 Oceano Dunes Middle Paso Robles10/14/2014 21.75 Stove Pipe Top of Steel 26.77 5.0212N/36W-36L01 Oceano Dunes Middle Paso Robles7/29/2014 21.57 Stove Pipe Top of Steel 26.77 5.2012N/36W-36L01 Oceano Dunes Middle Paso Robles6/4/2014 22.36 Stove Pipe Top of Steel 26.77 4.4112N/36W-36L01 Oceano Dunes Middle Paso Robles4/15/2014 19.89 Stove Pipe Top of Steel 26.77 6.8812N/36W-36L01 Oceano Dunes Middle Paso Robles1/14/2014 20.38 Stove Pipe Top of Steel 26.77 6.3912N/36W-36L01 Oceano Dunes Middle Paso Robles10/14/2013 21.71 Stove Pipe Top of Steel 26.77 5.0612N/36W-36L01 Oceano Dunes Middle Paso Robles7/9/2013 21.37 Stove Pipe Top of Steel 26.77 5.412N/36W-36L01 Oceano Dunes Middle Paso Robles4/10/2013 20.10 Stove Pipe Top of Steel 26.77 6.6712N/36W-36L01 Oceano Dunes Middle Paso Robles1/14/2013 18.62 Stove Pipe Top of Steel 26.77 8.1512N/36W-36L01 Oceano Dunes Middle Paso Robles10/31/2012 20.11 Stove Pipe Top of Steel 26.77 6.6612N/36W-36L01 Oceano Dunes Middle Paso Robles7/24/2012 19.42 Stove Pipe Top of Steel 26.77 7.3512N/36W-36L01 Oceano Dunes Middle Paso Robles4/20/2012 18.26 Stove Pipe Top of Steel 26.77 8.5112N/36W-36L01 Oceano Dunes Middle Paso Robles4/18/2012 23.83 Stove Pipe Top of Steel 26.77 2.9412N/36W-36L01 Oceano Dunes Middle Paso Robles1/11/2012 17.68 Stove Pipe Top of Steel 26.77 9.0912N/36W-36L01 Oceano Dunes Middle Paso Robles11/21/2011 18.08 Stove Pipe Top of Steel 26.77 8.6912N/36W-36L01 Oceano Dunes Middle Paso Robles7/26/2011 19.63 Stove Pipe Top of Steel 26.77 7.1412N/36W-36L01 Oceano Dunes Middle Paso Robles4/20/2011 18.26 Stove Pipe Top of Steel 26.77 8.5112N/36W-36L01 Oceano Dunes Middle Paso Robles1/24/2011 17.61 Stove Pipe Top of Steel 26.77 9.1612N/36W-36L01 Oceano Dunes Middle Paso Robles10/21/2010 20.75 Stove Pipe Top of Steel 26.77 6.0212N/36W-36L01 Oceano Dunes Middle Paso Robles7/27/2010 21.18 Stove Pipe Top of Steel 26.77 5.5912N/36W-36L01 Oceano Dunes Middle Paso Robles4/26/2010 15.94 Flush Top Flush Mount 23.98 8.0412N/36W-36L01 Oceano Dunes Middle Paso Robles10/21/2009 17.72 Flush Top Flush Mount 23.98 6.2612N/36W-36L01 Oceano Dunes Middle Paso Robles8/20/2009 19.16 Flush Top Flush Mount 23.98 4.8212N/36W-36L01 Oceano Dunes Middle Paso Robles5/11/2009 17.68 Flush Top Flush Mount 23.98 6.3012N/36W-36L01 Oceano Dunes Middle Paso Robles4/18/2009 15.95 Flush Top Flush Mount 23.98 8.03P:\Portland\672‐Northern Cities Management Area\006‐2019 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx4/22/2020 Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)12N/36W-36L02 Oceano Dunes DeepCareaga 10/9/201924.32 Stove Pipe Top of Steel 26.772.4512N/36W-36L02 Oceano Dunes DeepCareaga7/9/201921.30 Stove Pipe Top of Steel 26.775.4712N/36W-36L02 Oceano Dunes DeepCareaga4/9/201915.72 Stove Pipe Top of Steel 26.7711.0512N/36W-36L02 Oceano Dunes DeepCareaga1/8/201917.45 Stove Pipe Top of Steel 26.779.3212N/36W-36L02 Oceano Dunes DeepCareaga10/9/2018 25.10 Stove Pipe Top of Steel 26.771.6712N/36W-36L02 Oceano Dunes DeepCareaga7/10/2018 24.11 Stove Pipe Top of Steel 26.772.6612N/36W-36L02 Oceano Dunes DeepCareaga4/10/2018 16.02 Stove Pipe Top of Steel 26.7710.7512N/36W-36L02 Oceano Dunes DeepCareaga1/10/2018 19.11 Stove Pipe Top of Steel 26.777.6612N/36W-36L02 Oceano Dunes DeepCareaga10/10/2017 24.70 Stove Pipe Top of Steel 26.772.0712N/36W-36L02 Oceano Dunes DeepCareaga7/11/2017 23.65 Stove Pipe Top of Steel 26.773.1212N/36W-36L02 Oceano Dunes DeepCareaga4/10/2017 15.00 Stove Pipe Top of Steel 26.7711.7712N/36W-36L02 Oceano Dunes DeepCareaga1/10/2017 16.15 Stove Pipe Top of Steel 26.7710.6212N/36W-36L02 Oceano Dunes DeepCareaga10/12/2016 27.86 Stove Pipe Top of Steel 26.77-1.0912N/36W-36L02 Oceano Dunes DeepCareaga7/19/2016 25.76 Stove Pipe Top of Steel 26.771.0112N/36W-36L02 Oceano Dunes DeepCareaga4/12/2016 18.43 Stove Pipe Top of Steel 26.778.3412N/36W-36L02 Oceano Dunes DeepCareaga1/12/2016 16.27 Stove Pipe Top of Steel 26.7710.5012N/36W-36L02 Oceano Dunes DeepCareaga10/13/2015 27.17 Stove Pipe Top of Steel 26.77-0.4012N/36W-36L02 Oceano Dunes DeepCareaga7/14/2015 26.11 Stove Pipe Top of Steel 26.770.6612N/36W-36L02 Oceano Dunes DeepCareaga4/14/2015 22.24 Stove Pipe Top of Steel 26.774.5312N/36W-36L02 Oceano Dunes DeepCareaga1/13/2015 16.91 Stove Pipe Top of Steel 26.779.8612N/36W-36L02 Oceano Dunes DeepCareaga10/14/2014 26.30 Stove Pipe Top of Steel 26.770.4712N/36W-36L02 Oceano Dunes DeepCareaga7/29/2014 25.64 Stove Pipe Top of Steel 26.771.1312N/36W-36L02 Oceano Dunes DeepCareaga6/4/2014 25.22 Stove Pipe Top of Steel 26.771.5512N/36W-36L02 Oceano Dunes DeepCareaga4/15/2014 16.94 Stove Pipe Top of Steel 26.779.8312N/36W-36L02 Oceano Dunes DeepCareaga1/14/2014 18.76 Stove Pipe Top of Steel 26.778.0112N/36W-36L02 Oceano Dunes DeepCareaga10/14/2013 23.94 Stove Pipe Top of Steel 26.772.8312N/36W-36L02 Oceano Dunes DeepCareaga7/9/2013 23.15 Stove Pipe Top of Steel 26.773.6212N/36W-36L02 Oceano Dunes DeepCareaga4/10/2013 15.35 Stove Pipe Top of Steel 26.7711.4212N/36W-36L02 Oceano Dunes DeepCareaga1/14/2013 11.24 Stove Pipe Top of Steel 26.7715.5312N/36W-36L02 Oceano Dunes DeepCareaga10/31/2012 18.81 Stove Pipe Top of Steel 26.777.9612N/36W-36L02 Oceano Dunes DeepCareaga7/24/2012 19.05 Stove Pipe Top of Steel 26.777.7212N/36W-36L02 Oceano Dunes DeepCareaga4/18/2012 10.81 Stove Pipe Top of Steel 26.7715.9612N/36W-36L02 Oceano Dunes DeepCareaga1/11/2012 11.18 Stove Pipe Top of Steel 26.7715.5912N/36W-36L02 Oceano Dunes DeepCareaga11/21/2011 13.99 Stove Pipe Top of Steel 26.7712.7812N/36W-36L02 Oceano Dunes DeepCareaga7/26/2011 18.03 Stove Pipe Top of Steel 26.778.7412N/36W-36L02 Oceano Dunes DeepCareaga1/24/2011 9.37 Stove Pipe Top of Steel 26.7717.4012N/36W-36L02 Oceano Dunes DeepCareaga10/21/2010 19.77 Stove Pipe Top of Steel 26.777.0012N/36W-36L02 Oceano Dunes DeepCareaga7/27/2010 20.53 Stove Pipe Top of Steel 26.776.2412N/36W-36L02 Oceano Dunes DeepCareaga4/26/2010 9.24Flush Top Flush Mount 23.9814.7412N/36W-36L02 Oceano Dunes DeepCareaga10/21/2009 17.65Flush Top Flush Mount 23.986.3312N/36W-36L02 Oceano Dunes DeepCareaga8/20/2009 19.15Flush Top Flush Mount 23.984.8312N/36W-36L02 Oceano Dunes DeepCareaga5/11/2009 14.38Flush Top Flush Mount 23.989.60P:\Portland\672‐Northern Cities Management Area\006‐2019 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx4/22/2020 Appendix A: NCMA Sentry Wells Water Level DataWellCommonNameAquifer DateDepth to Water(feet)Surface CompletionRP DescriptionRP Elev,feet NAVD88Groundwater Elevation(feet VD88)12N/35W-32C03 County MW-3 Paso Robles 10/9/201942.42 Flush Top Flush Mount 47.70 5.2812N/35W-32C03 County MW-3 Paso Robles 7/9/201937.20 Flush Top Flush Mount 47.70 10.5012N/35W-32C03 County MW-3 Paso Robles 4/9/201932.50 Flush Top Flush Mount 47.70 15.2012N/35W-32C03 County MW-3 Paso Robles 1/8/201935.45 Flush Top Flush Mount 47.70 12.2512N/35W-32C03 County MW-3 Paso Robles10/9/2018 43.85 Flush Top Flush Mount 47.70 3.8512N/35W-32C03 County MW-3 Paso Robles7/10/2018 40.00 Flush Top Flush Mount 47.70 7.7012N/35W-32C03 County MW-3 Paso Robles4/10/2018 32.80 Flush Top Flush Mount 47.70 14.9012N/35W-32C03 County MW-3 Paso Robles1/10/2018 35.10 Flush Top Flush Mount 47.70 12.6012N/35W-32C03 County MW-3 Paso Robles10/10/2017 42.05 Flush Top Flush Mount 47.70 5.6512N/35W-32C03 County MW-3 Paso Robles7/11/2017 38.34 Flush Top Flush Mount 47.70 9.3612N/35W-32C03 County MW-3 Paso Robles4/11/2017 28.44 Flush Top Flush Mount 47.70 19.2612N/35W-32C03 County MW-3 Paso Robles1/10/2017 34.85 Flush Top Flush Mount 47.70 12.8512N/35W-32C03 County MW-3 Paso Robles10/12/2016 47.49 Flush Top Flush Mount 47.70 0.2112N/35W-32C03 County MW-3 Paso Robles7/19/2016 44.51 Flush Top Flush Mount 47.70 3.1912N/35W-32C03 County MW-3 Paso Robles4/12/2016 36.41 Flush Top Flush Mount 47.70 11.2912N/35W-32C03 County MW-3 Paso Robles1/12/2016 36.48 Flush Top Flush Mount 47.70 11.2212N/35W-32C03 County MW-3 Paso Robles10/13/2015 51.21 Flush Top Flush Mount 47.70 -3.5112N/35W-32C03 County MW-3 Paso Robles7/14/2015 49.07 Flush Top Flush Mount 47.70 -1.3712N/35W-32C03 County MW-3 Paso Robles4/14/2015 44.00 Flush Top Flush Mount 47.70 3.7012N/35W-32C03 County MW-3 Paso Robles1/13/2015 38.90 Flush Top Flush Mount 47.70 8.8012N/35W-32C03 County MW-3 Paso Robles10/14/2014 50.50 Flush Top Flush Mount 47.70 -2.8012N/35W-32C03 County MW-3 Paso Robles7/29/2014 44.02 Flush Top Flush Mount 47.70 3.6812N/35W-32C03 County MW-3 Paso Robles6/4/2014 45.46 Flush Top Flush Mount 47.70 2.2412N/35W-32C03 County MW-3 Paso Robles4/15/2014 41.51 Flush Top Flush Mount 47.70 6.1912N/35W-32C03 County MW-3 Paso Robles1/14/2014 41.00 Flush Top Flush Mount 47.70 6.7012N/35W-32C03 County MW-3 Paso Robles10/14/2013 45.26 Flush Top Flush Mount 47.70 2.4412N/35W-32C03 County MW-3 Paso Robles7/9/2013 43.83 Flush Top Flush Mount 47.70 3.8712N/35W-32C03 County MW-3 Paso Robles4/10/2013 37.89 Flush Top Flush Mount 47.70 9.8112N/35W-32C03 County MW-3 Paso Robles1/14/2013 32.26 Flush Top Flush Mount 47.70 15.4412N/35W-32C03 County MW-3 Paso Robles10/30/2012 40.05 Flush Top Flush Mount 47.70 7.6512N/35W-32C03 County MW-3 Paso Robles7/25/2012 38.62 Flush Top Flush Mount 47.70 9.0812N/35W-32C03 County MW-3 Paso Robles4/19/2012 23.02 Flush Top Flush Mount 47.70 24.68P:\Portland\672‐Northern Cities Management Area\006‐2019 Annual Report\Water Levels\NCMA_WL_SentryWells.xlsx4/22/2020 AppendixA:NCMASentryWellsWaterQualityDataWell Date TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l umhos/cm mg/l32S/12E-24B01 10/14/2019 3,100 1,300 540 29 180 180 410 180 ND 2 0.15 0 0.01 1.3 3.7 410 ND ND 4,900 2.7 0.0028 35132S/12E-24B01 4/10/2019 2,800 1,400 520 35 180 190 430 200 ND 2 0.15 ND 0.11 1.4 4.0 430 ND ND 5,260 2.1 0.0029 35032S/12E-24B01 10/9/2018 2,800 1,400 600 35 180 190 410 190 ND 2 0.15 ND 0.11 1.4 2.8 410 ND ND 5,040 22 0.0020 50032S/12E-24B01 4/11/2018 3,000 1,400 560 33 170 180 430 200 0.25 2.0 0.15 ND 0.11 1.4 5.1 430 ND ND 5,150 2.2 0.0036 27532S/12E-24B01 10/11/2017 3,100 1,400 590 36 180 190 430 190 ND 2.3 0.17 0.13 0.11 1.4 0.64 430 ND ND 5,180 1.7 0.0005 218832S/12E-24B01 4/11/2017 3,400 1,400 680 41 190 210 420 190 ND 2.4 0.16 0.17 0.11 1.6 4.7 420 ND ND 5,020 1.8 0.0034 29832S/12E-24B01 10/11/2016 3,100 1,400 700 44 210 220 450 190 0.26 2.1 0.18 ND 0.12 1.6 4.1 450 ND ND 5,020 1.3 0.0029 34132S/12E-24B01 4/12/2016 2,800 1,400 640 37 170 180 420 190 <0.48 2.2 0.16 <0.055 0.081 1.3 4.8 420 <8.2 <8.2 5,000 0.73 0.0034 29232S/12E-24B01 10/15/2015 3,230 230 560 34 160 170 413 42 <0.05 2.2 0.14 <0.10 0.091 1.1 0.68 413 <10 <10 4,880 0.54 0.0030 33832S/12E-24B01 4/15/2015 3,010 1,300 510 30 150 160 410 220 <0.05 2.9 0.15 <0.5 0.023 1.0 3.4 410 <10 <10 4,760 0.72 0.0026 38232S/12E-24B01 1/14/2015 2,980 1,300 520 30 150 170 400 210 <0.25 2.2 0.14 <0.5 <0.021 1.0 2.9 400 <10 <10 4,640 0.52 0.0022 44832S/12E-24B01 10/14/2014 3,160 1,100 530 32 150 170 390 180 0.32 2.2 0.16 <0.5 <0.01 1.1 <0.5 390 <10 <10 4,780 0.67 NA NA32S/12E-24B01 7/30/2014 2,950 1,300 520 29 140 170 440 190 <0.25 1.9 0.11 <0.5 0.03 1.1 2.6 440 <10 <10 4,830 0.62 0.0020 50032S/12E-24B01 4/16/2014 2,880 1,200 560 29 140 140 390 190 <0.05 2.2 0.130 <0.5 0.03 0.92 2.9 390 <10 <10 4,790 0.72 0.0024 41432S/12E-24B01 1/15/2014 2,870 1,300 540 30 140 160 380 214 <0.25 2.4 0.17 <0.5 <0.01 1.0 3.0 380 <10 <10 4,800 0.71 0.0023 43332S/12E-24B01 10/15/2013 2,860 1,200 560 31 150 160 380 200 <0.25 2.2 0.13 <0.5 <0.01 1.0 3.0 380 <10 <10 4,810 0.75 0.0025 40032S/12E-24B01 7/9/2013 2,960 1,300 560 32 150 160 395 215 <0.25 2.4 0.16 <0.5 <0.01 1.1 2.0 395 <10 <10 4,850 0.81 0.0015 65032S/12E-24B01 4/10/2013 2,920 1,300 540 30 140 150 410 220 <0.25 1.9 0.16 <0.1 <0.01 1.00 3.5 410 <10 <10 4,830 0.67 0.0027 37132S/12E-24B01 1/14/2013 2,630 1,300 540 30 140 140 410 220 <0.05 2.7 0.15 <0.1 <0.01 0.96 2.8 410 <10 <10 4,790 0.72 0.0022 46432S/12E-24B01 10/29/2012 2,950 1,200 590 34 150 160 360 200 <0.25 2.4 0.18 <0.5 <0.01 1.1 11 360 <10 <10 4,750 0.78 0.0092 10932S/12E-24B01 7/23/2012 3,010 1,400 530 30 120 130 397 210 <0.05 2.1 0.15 <0.1 0.041 0.86 3 397 <10 <10 4,720 1.4 0.0021 46732S/12E-24B01 4/18/2012 3,000 1,500 450 27 120 120 400 230 <0.1 2 0.13 0.13 <0.01 0.89 3.12 400 <10 <10 4,660 0.6 0.0021 48132S/12E-24B01 1/11/2012 2,750 1,200 520 30 140 140 400 170 <0.1 4 0.18 0.1 0.033 0.94 3.2 400 <10 <10 4,560 0.55 0.0027 37532S/12E-24B01 11/21/2011 2,740 1,200 410 25 130 120 380 200 <0.3 2.3 0.13 <0.6 0.053 0.9 2.73 380 <10 <10 4,470 0.7 0.0023 44032S/12E-24B01 7/25/2011 3,690 1,200 530 33 140 150 380 200.2 <0.05 1.8 0.14 <0.1 0.053 0.91 3.281 380 <5 <5 4,900 0.73 0.0027 36632S/12E-24B01 4/20/2011 2,810 1,214 500 27 140 130 400 216 <0.05 1.7 0.24 0.18 0.067 0.95 3.3 400 <2.0 <2.0 4,430 NA 0.0027 36832S/12E-24B01 1/24/2011 2,380 1,100 370 24 110 120 380 180 <0.15 1.8 0.16 <0.3 0.63 0.68 2.8 380 <2.0 <2.0 4,020 0.89 0.0025 39332S/12E-24B01 10/28/2010 2,330 960 390 25 140 140 350 160 <0.1 3.9 0.15 <0.1 NA 0.75 2.6 350 <10 <10 3,860 1.3 0.0027 36932S/12E-24B01 7/27/2010 616 43 52.5 6.21 115 44.7 341 160 < 0.10 2.9 0.063 < 0.10 0.11 0.274 0.18 341 < 1.0 < 1.0 1,000 9.34 0.0042 23932S/12E-24B01 4/27/2010 676 47 54.7 4.60 107 43.6 327 140 < 0.10 0.98 0.0714 < 0.10 < 0.10 0.0458 0.18 327 < 1.0 < 1.0 990 4.06 0.0038 26132S/12E-24B01 1/27/2010 694 55 56.2 6.80 123 43.2 340 150 0.40 1.7 0.12 < 0.10 0.33 0.875 0.19 340 < 1.0 < 1.0 1,000 16.6 0.0035 28932S/12E-24B01 10/19/2009 766 140 121 16.7 111 52.4 303 150 0.25 2.8 0.0959 0.11 < 0.10 0.208 0.47 303 < 1.0 < 1.0 1,200 7.79 0.0034 29832S/12E-24B01 8/20/2009 705 94 86.8 11.7 116 35.6 286 150 0.21 2.7 NA < 0.10 0.12 0.248 0.38 286 < 1.0 < 1.0 1,000 7.15 0.0040 24732S/12E-24B01 5/12/2009 695 100 82.1 13.2 108 45 288 150 NA NA NA 0.11 NA 0.66 0.29 288 < 1.0 < 1.0 1,100 23.9 0.0029 34532S/12E-24B01 3/26/1996 1,870 773 380 24.0 125 95 427 154 0.2 NA 0.27 NA NA NA NA NA NA NA NA NA NA NA32S/12E-24B01 6/9/1976 1,706 667 400 16.2 94 95 474 159 0.4 NA 0.12 0.5 NA NA NA NA NA NA NA NA NA NA32S/12E-24B01 1/17/1966 1,700 652 406 20.0 95 83 440 175 1 NA 0.07 0.3 NA NA NA NA NA NA NA NA NA NAP:\Portland\672ͲNorthernCitiesManagementArea\006Ͳ2019AnnualReport\WaterQuality\NCMA_WQ_SentryWells_thru2019.xlsx4/22/2020 AppendixA:NCMASentryWellsWaterQualityDataWell Date TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l umhos/cm mg/l32S/12E-24B02 10/14/2019 700 30 45 3.7 110 35 310 160 ND 0.10 0.078 0.046 0 0.18 ND 310 ND ND 931 0.62 NA NA32S/12E-24B02 7/10/2019 550 30 48 4.2 120 37 320 160 ND 0.34 0.074 0.037 0 0.18 ND 320 ND ND 931 0.62 NA NA32S/12E-24B02 4/10/2019 620 31 42 3.6 110 35 320 160 ND 0.31 0.070 0.059 ND 0.17 0.130 320 ND ND 941 0.59 0.0042 23832S/12E-24B02 1/8/2019 630 30 43 3.6 110 35 310 160 ND 0.27 0.072 0.056 0.013 0.17 0.096 310 ND ND 938 0.59 0.0032 31332S/12E-24B02 10/9/2018 640 30 48 3.8 120 37 320 160 ND 0.34 0.068 0.025 0.013 0.18 0.06 320 ND ND 952 0.62 0.0020 49232S/12E-24B02 7/12/2018 620 29 46 3.7 120 36 320 150 ND 0.30 0.072 0.042 0.013 0.17 0.11 320 ND ND 962 0.69 0.0038 26432S/12E-24B02 4/11/2018 660 31 45 3.5 110 35 320 160 0.034 0.28 0.069 0.050 0.011 0.17 0.10 320 ND ND 942 0.58 0.0032 31032S/12E-24B02 1/12/2018 570 30 53 3.8 120 38 320 160 ND 0.32 0.071 0.068 0.015 0.18 0.11 320 ND ND 930 0.56 0.0037 27332S/12E-24B02 10/11/2017 670 31 45 3.7 120 38 330 160 ND 0.41 0.077 0.045 0.014 0.18 0.1 330 ND ND 962 0.74 0.0032 31032S/12E-24B02 7/12/2017 760 31 48 4 130 39 310 160 ND 0.18 0.072 0.04 0.015 0.2 0.12 310 ND ND 948 0.93 0.0039 25832S/12E-24B02 4/11/2017 630 34 46 3.7 120 35 310 170 ND 0.31 0.062 0.09. 0.017 0.17 0.12 310 ND ND 933 0.59 0.0035 28332S/12E-24B02 1/12/2017 660 34 47 3.7 120 36 320 170 ND 0.26 0.069 0.031 0.023 0.2 0.097 320 ND ND 938 0.79 0.0029 35132S/12E-24B02 10/11/2016 660 35 48 4 120 39 320 170 ND 0.26 0.069 0.038 0.023 0.18 0.12 320 ND ND 953 0.75 0.0034 29232S/12E-24B02 7/19/2016 660 36 50 3.9 120 38 320 160 <0.096 0.15 0.07 0.036 0.016 0.17 0.15 320 <4.1 <4.1 947 0.67 0.0042 24032S/12E-24B02 4/12/2016 640 35 48 3.8 110 37 300 160 <0.096 0.38 0.064 0.045 0.011 0.17 0.13 300 <4.1 <4.1 939 0.53 0.0037 26932S/12E-24B02 1/12/2016 570 38 48 3.8 110 36 290 170 <0.022 0.27 0.044 0.11 0.015 0.16 0.15 290 <4.1 <4.1 951 0.48 0.0039 25332S/12E-24B02 10/15/2015 650 34 41 3.8 100 33 306 160 <0.05 <1 0.054 <0.10 0.014 0.18 <0.10 306 <10 <10 950 0.72 NA NA32S/12E-24B02 7/15/2015 650 35 50 3.0 120 36 295 160 <0.05 <1 0.069 <0.1 0.01 0.16 <0.1 295 <10 <10 950 0.69 NA NA32S/12E-24B02 4/15/2015 620 35 40 3.4 100 31 300 170 <0.05 <1 0.066 <0.1 0.01 0.14 <0.1 300 <10 <10 900 0.45 NA NA32S/12E-24B02 1/14/2015 640 36 41 3.3 110 32 290 170 <0.05 <1 0.062 <0.1 <0.01 0.14 <0.1 290 <10 <10 900 0.48 NA NA32S/12E-24B02 10/14/2014 630 30 41 3.9 100 32 290 140 <0.05 <1 0.065 <0.1 <0.01 0.15 <0.1 290 <10 <10 940 0.44 NA NA32S/12E-24B02 7/29/2014 620 33 42 3.5 100 33 300 150 <0.05 <1 <0.1 <0.1 <0.01 0.14 <0.1 300 <10 <10 940 0.37 NA NA32S/12E-24B02 4/16/2014 630 32 43 4.3 88 28 300 150 <0.05 <1 0.067 <0.1 <0.01 0.12 <0.1 300 <10 <10 940 0.32 NA NA32S/12E-24B02 1/15/2014 630 33 46 3.9 100 34 290 165 <0.05 <1 <0.05 <0.1 <0.01 0.14 <0.1 290 <10 <10 940 0.37 NA NA32S/12E-24B02 10/15/2013 630 30 44 3.8 98 32 290 170 <0.05 <1 <0.05 <0.1 <0.01 0.13 <0.1 290 <10 <10 920 0.39 NA NA32S/12E-24B02 7/9/2013 630 30 43 3.9 110 33 295 170 <0.05 <1 0.076 <0.1 <0.01 0.14 <0.1 295 <10 <10 940 0.6 NA NA32S/12E-24B02 4/10/2013 630 31 44 4 100 32 310 160 <0.05 <1 0.08 <0.1 <0.01 0.13 <0.1 310 <10 <10 940 0.41 NA NA32S/12E-24B02 1/14/2013 620 30 43 4 97 31 305 170 <0.05 <1 0.079 <0.1 <0.01 0.12 <0.1 305 <10 <10 950 0.72 NA NA32S/12E-24B02 10/29/2012 650 29 45 4.2 100 32 280 160 <0.05 <1 0.074 0.14 <0.01 0.13 <0.1 280 <10 <10 950 0.56 NA NA32S/12E-24B02 7/23/2012 650 35 45 4.3 87 27 297 170 <0.05 <1 <0.1 <0.1 <0.01 0.12 <0.1 297 <10 <10 950 0.43 NA NA32S/12E-24B02 4/18/2012 630 37 39 3.7 88 28 310 171 <0.1 <1 <0.1 0.16 <0.01 0.099 <0.2 310 <10 <10 950 0.26 NA NA32S/12E-24B02 1/11/2012 650 33 46 4.6 110 32 300 150 <0.1 1.3 <0.1 0.21 <0.02 0.13 0.03 300 <10 <10 950 1.7 0.0010 97132S/12E-24B02 11/21/2011 640 32 39 3.9 93 29 290 150 <0.05 <1 0.064 <0.1 <0.01 0.096 <0.1 290 <10 <10 930 0.32 NA NA32S/12E-24B02 7/25/2011 640 36 48 4.2 97 31 290 165.3 <0.05 <1 <0.1 <0.1 <0.01 0.096 <0.1 290 <5 <5 950 0.88 NA NA32S/12E-24B02 4/20/2011 620 39 46 7.4 90 36 320 174 <0.05 <1 0.17 0.14 0.014 <0.005 <0.1 320 <2.0 <2.0 950 NA NA NA32S/12E-24B02 1/24/2011 640 43 44 5.9 87 28 270 170 <0.05 <1.0 0.11 <0.1 0.14 0.085 <0.1 270 <2.0 <2.0 940 1.3 NA NA32S/12E-24B02 10/28/2010 650 43 50 4.5 110 35 270 160 <0.1 <1.0 0.12 <0.1 NA 0.085 <0.3 270 <10 <10 970 0.63 NA NA32S/12E-24B02 7/27/2010 598 42 48.9 4.29 111 40.5 318 160 < 0.10 1.3 0.0609 < 0.10 0.11 0.106 0.15 318 < 1.0 < 1.0 980 2.84 0.0036 28032S/12E-24B02 4/27/2010 668 46 52.7 4.73 111 43.2 349 150 < 0.10 1.3 0.0666 < 0.10 0.14 0.101 0.16 349 < 1.0 < 1.0 980 6.66 0.0035 28832S/12E-24B02 1/27/2010 622 45 58.0 5.39 115 32.2 270 160 0.18 0.84 0.117 < 0.10 0.14 0.209 0.16 270 < 1.0 < 1.0 920 3.49 0.0036 28132S/12E-24B02 10/19/2009 600 49 59.1 5.12 112 30.1 281 160 < 0.10 0.98 0.0776 0.14 < 0.10 0.163 0.19 281 < 1.0 < 1.0 870 1.14 0.0039 25832S/12E-24B02 8/20/2009 630 49 63.5 5.85 128 30.1 288 150 < 0.10 0.98 NA < 0.10 < 0.10 0.203 0.20 288 < 1.0 < 1.0 920 3.22 0.0041 24532S/12E-24B02 5/12/2009 622 82 67.5 6.33 114 34.5 282 150 NA NA NA 0.11 NA 0.252 0.24 282 < 1.0 < 1.0 990 6.76 0.0029 34232S/12E-24B02 3/26/1996 652 54 46 5 107 24 344 169 0.2 NA 0.1 NA NA NA NA NA NA NA NA NA NA NA32S/12E-24B02 6/9/1976 565 34 52 4 104 27 337 153 0.6 NA 0.02 0.5 NA NA NA NA NA NA NA NA NA NA32S/12E-24B02 1/17/1966 651 62 79 5 101 32 380 147 0 NA 0.05 0.3 NA NA NA NA NA NA NA NA NA NAP:\Portland\672ͲNorthernCitiesManagementArea\006Ͳ2019AnnualReport\WaterQuality\NCMA_WQ_SentryWells_thru2019.xlsx4/22/2020 AppendixA:NCMASentryWellsWaterQualityDataWell Date TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l umhos/cm mg/l32S/12E-24B03 10/14/2019 660 48 56 4.0 120 40 330 170 ND 0.11 0.068 0.029 0.018 0.011 0.18 330 ND ND 1,010 0.26 0.0038 26732S/12E-24B03 7/10/2019 590 49 53 4.2 110 44 330 160 ND 0.15 0.065 0.020 0.018 0.010 0.18 330 ND ND 1,000 0.18 0.0037 27232S/12E-24B03 4/10/2019 640 50 50 3.7 110 43 320 160 ND 0.15 0.063 0.037 0.017 0.012 0.16 320 ND ND 1,020 0.44 0.0032 31332S/12E-24B03 1/8/2019 660 50 50 3.9 110 43 320 160 ND 0.12 0.065 0.039 0.021 0.011 0.14 320 ND ND 1,020 0.21 0.0028 35732S/12E-24B03 10/9/2018 690 48 52 4.1 110 45 320 160 ND 0.19 0.065 ND 0.020 0.011 0.10 320 ND ND 1,030 0.19 0.0020 50032S/12E-24B03 7/12/2018 650 47 51 3.8 110 42 320 150 ND 0.14 0.062 0.023 0.020 0.10 0.16 320 ND ND 1,040 0.18 0.0034 29432S/12E-24B03 4/11/2018 670 50 53 4.0 110 44 320 160 ND 0.11 0.065 0.017 0.019 0.011 0.19 320 ND ND 1,010 0.19 0.0038 26332S/12E-24B03 1/12/2018 620 48 57 3.9 110 45 330 160 ND 0.13 0.061 0.041 0.023 0.011 0.18 330 ND ND 993 0.19 0.0038 26732S/12E-24B03 10/11/2017 660 49 54 4 120 45 330 160 ND 0.16 0.069 0.022 0.02 0.011 0.19 330 ND ND 1020 0.20 0.0039 25832S/12E-24B03 7/12/2017 790 46 54 4 120 45 320 160 ND ND 0.062 0.015 0.02 0.011 0.18 320 ND ND 1,010 0.19 0.0039 25632S/12E-24B03 4/11/2017 670 48 55 4.1 120 45 330 160 ND 0.17 0.058 ND 0.019 0.012 0.21 330 ND ND 988 0.23 0.0044 22932S/12E-24B03 1/12/2017 670 47 58 4.3 130 50 340 160 ND ND 0.068 0.012 0.024 0.014 0.18 340 ND ND 1,000 0.27 0.0038 26132S/12E-24B03 10/11/2016 680 49 53 4 110 47 340 160 ND ND 0.06 0.015 0.025 0.013 0.17 340 ND ND 1020 0.22 0.0035 28832S/12E-24B03 7/19/2016 690 47 54 4.1 110 46 340 160 <0.096 0.32 0.063 0.017 0.016 0.013 0.20 340 <8.2 <8.2 1,010 0.32 0.0043 23532S/12E-24B03 4/12/2016 680 48 55 4.1 110 45 320 160 <0.096 0.21 0.056 0.019 0.018 0.012 0.17 320 <8.2 <8.2 1,010 0.28 0.0035 28232S/12E-24B03 1/12/2016 610 51 53 4.0 110 46 320 170 <0.022 0.11 0.037 0.038 <0.10 0.015 0.19 320 <8.2 <8.2 1,050 0.27 0.0037 26832S/12E-24B03 10/15/2015 650 44 48 4.4 100 42 325 160 <0.05 <1 <0.05 <0.10 0.016 0.010 <0.10 325 <10 <10 1,020 0.21 NA NA32S/12E-24B03 7/15/2015 680 46 60 40.0 120 47 333 160 <0.05 <1 0.064 <0.1 0.01 0.010 <0.1 333 <10 <10 1,020 0.20 NA NA32S/12E-24B03 4/15/2015 650 46 44 3.5 96 38 330 170 <0.05 <1 0.061 <0.1 0.012 0.0080 <0.1 330 <10 <10 980 0.17 NA NA32S/12E-24B03 1/14/2015 670 47 48 3.6 110 43 330 170 <0.05 <1 0.052 <0.10 0.01 0.090 <0.1 330 <10 <10 970 0.17 NA NA32S/12E-24B03 10/14/2014 650 40 48 4.1 100 41 330 142 <0.05 <1 0.061 <0.1 <0.01 0.010 <0.1 330 <10 <10 1,010 0.19 NA NA32S/12E-24B03 7/30/2014 650 45 45 3.1 94 40 390 150 <0.05 <1 <0.1 <0.1 <0.01 <0.005 <0.1 390 <10 <10 1,020 0.19 NA NA32S/12E-24B03 4/16/2014 660 43 46 4.3 90 35 330 150 0.23 <1 0.056 <0.1 <0.01 <0.005 0.11 330 <10 <10 1,010 0.16 0.0026 39132S/12E-24B03 1/15/2014 660 45 52 4.0 100 41 320 165 <0.05 <1 <0.05 <0.1 <0.01 0.0090 <0.1 320 <10 <10 1,010 0.17 NA NA32S/12E-24B03 10/15/2013 720 40 51 4.0 100 40 310 170 <0.05 <1 <0.05 <0.1 <0.01 0.0090 <0.1 310 <10 <10 1,010 0.2 NA NA32S/12E-24B03 7/9/2013 660 46 47 3.9 110 41 310 170 <0.05 <1 0.066 <0.1 <0.01 0.0100 <0.1 310 <10 <10 1,010 0.27 NA NA32S/12E-24B03 4/10/2013 670 44 46 3.8 96 38 320 160 <0.05 <1 0.071 <0.1 <0.01 0.0080 <0.1 320 <10 <10 1,010 0.19 NA NA32S/12E-24B03 1/14/2013 630 45 47 3.9 96 37 320 170 <0.05 <1 0.065 <0.1 <0.01 0.0080 <0.1 320 <10 <10 1,010 0.26 NA NA32S/12E-24B03 10/29/2012 680 45 49 4.1 100 39 305 158 <0.05 <1 0.069 0.1 <0.01 0.0090 <0.1 305 <10 <10 1,010 0.22 NA NA32S/12E-24B03 7/23/2012 670 49 47 4.1 86 35 318 170 <0.05 <1 <0.1 <0.1 <0.01 0.0150 <0.1 318 <10 <10 1,010 0.24 NA NA32S/12E-24B03 4/18/2012 640 50 40 3.4 84 33 320 160 <0.1 <1 <0.1 <0.2 <0.01 0.0070 <0.2 320 <10 <10 1,010 0.23 NA NA32S/12E-24B03 1/12/2012 660 46 48 3.2 92 36 300 150 <0.1 <1 <0.1 0.35 <0.02 0.0080 <0.2 300 <10 <10 1,000 0.15 NA NA32S/12E-24B03 11/21/2011 660 43 41 3.7 91 34 310 150 <0.05 1.6 0.046 <0.1 0.014 0.0090 <0.1 310 <10 <10 970 0.12 NA NA32S/12E-24B03 7/25/2011 650 46 50 6.0 98 38 310 159.6 <0.05 <1 <0.1 <0.1 0.011 0.0100 <0.1 310 <5 <5 1,010 0.21 NA NA32S/12E-24B03 4/20/2011 650 47 48 4.6 95 31 310 168 <0.05 <1 0.11 0.08 0.015 0.0080 <0.1 310 <2.0 <2.0 1,020 NA NA NA32S/12E-24B03 1/24/2011 660 46 44 5.6 87 33 320 160 <0.05 <1.0 NA <0.1 0.15 0.0096 <0.1 320 <2.0 <2.0 1,020 0.22 NA NA32S/12E-24B03 10/28/2010 660 44 48 3.8 110 39 315 50 <0.1 <1.0 0.089 <0.1 NA 0.0120 <0.3 315 <10 <10 1,020 0.55 NA NA32S/12E-24B03 7/27/2010 610 44 51.4 8.34 112 41.6 328 160 < 0.10 1.8 0.0533 < 0.10 0.17 0.0602 0.16 328 < 1.0 < 1.0 1,000 6.7 0.0036 27532S/12E-24B03 4/27/2010 666 45 53.2 4.84 118 44 357 150 < 0.10 1.5 0.0636 < 0.10 0.1 0.0519 0.17 357 < 1.0 < 1.0 980 9.71 0.0038 26532S/12E-24B03 1/27/2010 672 48 56.4 5.40 119 43.4 336 150 < 0.10 1.4 0.101 < 0.10 0.15 0.140 0.15 336 < 1.0 < 1.0 1,000 5.18 0.0031 32032S/12E-24B03 10/19/2009 622 40 55.1 3.93 110 42.6 342 160 < 0.10 < 0.50 0.0613 < 0.10 0.13 0.0181 0.14 342 < 1.0 < 1.0 880 0.343 0.0035 28632S/12E-24B03 8/19/2009 680 47 54.9 5.21 128 43.4 337 150 < 0.10 2.2 NA < 0.10 0.66 0.182 0.15 337 < 1.0 < 1.0 1,000 14.3 0.0032 31332S/12E-24B03 5/12/2009 645 44 53.2 4.53 108 41.8 332 140 NA NA NA < 0.10 NA 0.124 0.16 332 < 1.0 < 1.0 1,000 5.9 0.0036 27532S/12E-24B03 3/26/1996 646 41 52 4.3 104 42 412 164 0.2 NA 0.12 NA NA NA NA NA NA NA NA NA NA NA32S/12E-24B03 6/9/1976 569 36 53 3.7 85 39 330 165 0 NA 0.06 0.4 NA NA NA NA NA NA NA NA NA NA32S/12E-24B03 1/17/1966 670 79 74 5 103 36 345 158 1 NA 0 0.2 NA NA NA NA NA NA NA NA NA NAP:\Portland\672ͲNorthernCitiesManagementArea\006Ͳ2019AnnualReport\WaterQuality\NCMA_WQ_SentryWells_thru2019.xlsx4/22/2020 AppendixA:NCMASentryWellsWaterQualityDataWell Date TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l umhos/cm mg/l32S/13E-30F01 10/14/2019 460 62 69 2 43 18 82 120 13 0.11 0.092 0.046 ND ND 0.29 82 ND ND 696 0.061 0.0047 21432S/13E-30F01 4/10/2019 480 61 60 2.1 41 19 85 120 13 0.12 0.089 0.063 ND ND 0.19 85 ND ND 693 0.035 0.0031 32132S/13E-30F01 10/10/2018 460 62 72 2.3 44 21 84 120 13 0.09 0.09 0.034 ND ND 0.16 84 ND ND 696 ND 0.0026 38832S/13E-30F01 4/12/2018 470 58 69 2.3 44 21 82 110 12 0.14 0.09 0.030 ND ND 0.23 82 ND ND 699 ND 0.0040 25232S/13E-30F01 10/11/2017 500 68 67 2.2 46 23 97 120 13 0.18 0.093 0.045 ND 0.018 0.28 97 ND ND 752 0.061 0.0041 24332S/13E-30F01 4/12/2017 510 61 65 2.1 42 20 85 120 13 0.12 0.074 0.062 ND ND 0.28 85 ND ND 682 0.045 0.0046 21832S/13E-30F01 10/11/2016 480 62 72 2.3 46 23 91 120 12 0.13 0.09 0.046 ND ND 0.32 91 ND ND 702 ND 0.0052 19432S/13E-30F01 4/13/2016 460 60 70 2.3 43 21 90 120 52 0.2 0.086 0.054 <0.01 <.0040 0.30 90 <4.1 <4.1 696 <0.030 0.0050 20032S/13E-30F01 10/14/2015 450 58 61 2.1 39 19 87 120 13 <1 0.084 <0.10 <0.01 <0.005 0.18 87 <10 <10 700 <0.05 0.0031 32232S/13E-30F01 4/15/2015 460 64 60 2.0 40 19 90 130 12 <1 0.081 <0.1 <0.01 <0.005 0.202 90 <10 <10 700 <0.05 0.0032 31732S/13E-30F01 1/14/2015 550 95 69 2 50 24 98 140 12.50 <1 0.085 <0.1 <0.01 <0.005 0.2 98 <10 <10 820 <0.05 0.0018 56232S/13E-30F01 10/14/2014 470 58 64 2 42 19 84 120 10.00 <1 0.081 <0.1 <0.01 <0.005 0.2 84 <10 <10 730 <0.05 0.0030 33732S/13E-30F01 7/30/2014 540 89 71 2 46 24 94 130 13.6 <1 <0.1 <0.1 <0.01 <0.005 0.101 94 <10 <10 860 <0.05 0.0011 88132S/13E-30F01 4/16/2014 610 122 78 3.3 47 22 100 140 12 <1 0.100 <0.1 <0.01 <0.005 0.17 100 <10 <10 970 <0.05 0.0014 71832S/13E-30F01 1/15/2014 510 80 69 2.3 45 22 94 136 12.6 13.00 <0.1 <0.1 <0.01 <0.005 0.19 94 <10 <10 810 <0.05 0.0024 42132S/13E-30F01 10/15/2013 530 78 73 2.3 47 22 86 140 12 <1 0.072 <0.1 <0.01 <.005 0.17 86 <10 <10 830 <0.05 0.0022 45932S/13E-30F01 7/10/2013 480 80 64 2.2 49 22 85 140 12.2 <1 0.089 <0.1 <0.01 <0.005 <0.1 85 <10 <10 770 <0.05 NA NA32S/13E-30F01 4/11/2013 460 60 60 2.20 38 18 78 120 12 <1 0.091 <0.1 <0.01 <0.005 0.2 78 <10 <10 710 <0.05 0.0033 30032S/13E-30F01 1/15/2013 440 65 64 2.40 40 19 95 130 12 <1 0.090 <0.1 <0.01 <0.005 0.11 95 <10 <10 720 0.05 0.0017 59132S/13E-30F01 10/30/2012 470 60 66 2.50 43 20 75 123 12 <1 0.087 <0.1 <0.01 <0.005 0.13 75 <10 <10 720 <0.05 0.0022 46232S/13E-30F01 7/24/2012 470 73 66 2.70 36 18 86 120 13 <1 <0.1 <0.1 <0.01 0.019 0.11 86 <10 <10 720 <0.05 0.0015 66432S/13E-30F01 4/19/2012 450 72 52 1.90 32 15 81 130 13 <1 <0.1 <0.2 <0.01 <0.005 <0.2 81 <10 <10 700 <0.1 NA NA32S/13E-30F01 1/10/2012 460 67 61 2.00 35 17 81 120 11 <1 <0.1 0.12 <0.01 <0.005 <0.1 81 <10 <10 720 <0.1 NA NA32S/13E-30F01 11/17/2011 470 70 82 2.40 40 19 78 120 12 <1 <0.1 <0.1 <0.01 <0.005 0.16 78 <10 <10 720 <0.1 0.0023 43832S/13E-30F01 7/25/2011 460 66 68 4.40 37 19 78 117.4 12.17 <1 0.100 0.101 <0.01 0.014 0.178 78 <5 <5 720 0.11 0.0027 37032S/13E-30F01 4/20/2011 460 71 69 2.60 36 14 87 124 12 <1 0.180 0.11 <0.01 <0.005 0.17 87 <2.0 <2.0 730 NA 0.0024 41832S/13E-30F01 1/24/2011 510 75 64 4.00 34 18 83 140 11 <1.0 0.170 0.11 <0.10 <0.005 <0.1 83 <2.0 <2.0 780 <0.1 NA NA32S/13E-30F01 10/21/2010 540 100 73 2.00 43 21 88 120 13 <1.0 0.067 <0.1 NA <0.005 <0.3 88 <10 <10 894 <.1 NA NA32S/13E-30F01 7/26/2010 464 74 82.2 2.16 47.9 25.1 88.0 120 12 < 0.50 0.098 < 0.10 < 0.10 0.0817 0.37 88.0 < 1.0 < 1.0 710 0.79 0.0050 20032S/13E-30F01 4/27/2010 534 72 77.1 2.59 45.8 23.6 100 140 9.8 0.56 0.129 < 0.10 < 0.10 0.112 0.29 100 < 1.0 < 1.0 780 1.02 0.0040 24832S/13E-30F01 1/28/2010 725 140 99.9 2.70 76.4 35.8 214 170 1.6 0.84 0.120 < 0.10 < 0.10 0.112 0.56 214 < 1.0 < 1.0 1,200 0.640 0.0040 25032S/13E-30F01 10/19/2009 522 74 85.6 2.35 52.8 26.3 102 150 13 0.70 0.136 0.13 < 0.10 0.123 0.32 102 < 1.0 < 1.0 770 1.30 0.0043 23132S/13E-30F01 8/19/2009 648 92 98.9 3.84 63.1 31.9 113 190 10 0.56 NA < 0.10 0.12 1.03 0.32 113 < 1.0 < 1.0 970 4.52 0.0035 28832S/13E-30F01 5/12/2009 792 110 108 2.89 80.2 39.9 136 280 NA NA NA < 0.10 NA 0.0353 0.39 136 < 1.0 < 1.0 1,200 0.281 0.0035 282P:\Portland\672ͲNorthernCitiesManagementArea\006Ͳ2019AnnualReport\WaterQuality\NCMA_WQ_SentryWells_thru2019.xlsx4/22/2020 AppendixA:NCMASentryWellsWaterQualityDataWell Date TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l umhos/cm mg/l32S/13E-30F02 10/14/2019 550 51 50 2.7 83 32 180 130 14 ND 0.097 0.077 ND 0.150 0.63 180 ND ND 841 0.06 0.0124 8132S/13E-30F02 7/9/2019 620 51 47 2.5 82 35 190 120 14 0.130 0.092 0.084 ND 0.017 0.49 190 ND ND 838 ND 0.0096 10432S/13E-30F02 4/10/2019 570 53 43 2.7 78 32 180 130 14 0.085 0.093 0.090 ND 0.046 0.47 180 ND ND 852 0.05 0.0089 11332S/13E-30F02 1/8/2019 560 52 44 2.7 80 34 190 130 14 0.059 0.094 0.091 ND 0.013 0.62 190 ND ND 845 ND 0.0119 8432S/13E-30F02 10/10/2018 580 51 50 2.9 83 35 190 130 14 0.07 0.094 0.07 ND 0.020 0.42 190 ND ND 848 0.07 0.0082 12132S/13E-30F02 7/10/2018 580 53 48 2.7 83 36 190 130 14 0.23 0.095 0.11 ND 0.026 0.59 190 ND ND 893 0.045 0.0111 9032S/13E-30F02 4/12/2018 580 48 48 2.8 82 35 190 120 13 0.12 0.097 0.072 ND 0.022 0.48 190 ND ND 854 ND 0.0100 10032S/13E-30F02 1/11/2018 580 52 51 2.7 82 36 200 130 14 0.14 0.091 0.12 ND 0.032 0.68 200 ND ND 846 ND 0.0131 7632S/13E-30F02 10/11/2017 580 51 46 2.6 80 34 200 130 14 0.16 0.094 0.083 ND 0.037 0.65 200 ND ND 877 0.037 0.0127 7832S/13E-30F02 7/12/2017 570 52 49 2.9 89 39 200 130 13 ND 0.094 0.096 ND 0.15 0.66 200 ND ND 861 ND 0.0127 7932S/13E-30F02 4/12/2017 620 52 51 2.9 88 38 200 130 13 ND 0.088 0.063 ND 0.022 0.67 200 ND ND 8560.0410.0129 7832S/13E-30F021/10/2017 590 52 50 2.8 90 37 220 140 13 ND 0.09 0.08 ND 1.1 0.6 220 ND ND 884 0.15 0.0115 8732S/13E-30F02 10/11/2016 600 52 50 2.9 89 40 220 140 13 0.089 0.09 0.074 ND 0.025 0.6 220 ND ND 886 ND 0.0115 8732S/13E-30F02 7/20/2016 590 51 51 3.0 88 38 220 130 58 0.14 0.091 0.072 <0.010 0.170 0.57 220 <4.1 <4.1 880 0.033 0.0112 8932S/13E-30F02 4/13/2016 570 51 51 2.9 89 40 200 130 58 0.08 0.1 0.086 <0.010 0.014 0.60 200 <4.1 <4.1 876 <0.030 0.0118 8532S/13E-30F02 1/13/2016 610 53 51 2.9 89 38 210 140 13 0.14 0.091 0.15 <0.010 0.035 0.47 210 <4.1 <4.1 858 <0.030 0.0089 11332S/13E-30F02 10/14/2015 570 49 45 2.8 80 35 212 130 13 <1 0.085 <0.10 <0.01 0.20 0.39 212 <10 <10 890 0.078 0.0080 12632S/13E-30F02 7/15/2015 610 50 51 2.0 88 38 204 140 13 <1 0.091 <0.1 <0.01 0.048 0.30 204 <10 <10 890 <0.05 0.0060 16732S/13E-30F02 4/15/2015 570 51 43 2.7 78 34 200 140 13.5 <1 0.085 <0.1 <0.01 0.087 0.42 200 <10 <10 850 <0.05 0.0082 12132S/13E-30F02 1/14/2015 590 51 42 2.4 80 34 210 140 13 <1 0.08 <0.1 <0.01 0.014 0.324 210 <10 <10 860 <0.05 0.0064 15732S/13E-30F02 10/14/2014 600 46 42 2.6 76 32 310 120 12 <1 0.08 <0.1 <0.01 0.22 0.37 310 <10 <10 890 <0.05 0.0080 12432S/13E-30F02 7/30/2014 580 49 46 2.6 80 35 210 130 13 <1 <0.1 <0.1 <0.01 0.02 0.27 210 <10 <10 890 <0.05 0.0055 18132S/13E-30F02 4/16/2014 590 49 45 3.3 68 30 200 130 12 <1 0.089 <0.1 <0.01 0.011 0.44 200 <10 <10 890 <0.05 0.0090 11132S/13E-30F02 1/15/2014 580 50 45 2.7 76 31 190 136 13.1 13.4 <0.1 <0.1 <0.01 0.054 0.4 190 <10 <10 890 <0.05 0.0080 12532S/13E-30F02 10/15/2013 570 50 45 2.7 75 33 190 140 12 <1 0.69 0.19 <0.01 0.099 0.38 190 <10 <10 890 <0.05 0.0076 13232S/13E-30F02 7/10/2013 570 50 38 2.6 78 32 190 180 <0.05 <1 0.08 0.13 <0.01 0.14 <0.1 190 <10 <10 880 <0.05 NA NA32S/13E-30F02 4/11/2013 590 50 41 2.6 70 30 190 140 14 <1 0.09 0.1 <0.01 0.082 0.43 190 <10 <10 880 <0.05 0.0086 11632S/13E-30F02 1/15/2013 550 50 44 2.9 72 31 200 140 13 <1 0.09 0.1 <0.01 0.011 0.32 200 <10 <10 880 0.12 0.0064 15632S/13E-30F02 10/30/2012 610 48 45 3.0 79 34 188 135 13 <1 0.09 <0.1 <0.01 0.06 0.31 188 <10 <10 890 0.011 0.0065 15532S/13E-30F02 7/24/2012 590 56 46 3.2 69 30 194 140 14 <1 <0.1 0.11 <0.01 0.038 0.27 194 <10 <10 880 <0.05 0.0048 20732S/13E-30F02 4/19/2012 600 60 40 2.7 68 30 200 140 14 <1 <0.1 <0.2 <0.01 0.19 0.3 200 <10 <10 890 0.11 0.0050 20032S/13E-30F02 1/12/2012 610 52 45 3.0 73 32 200 130 12 <1 <0.1 0.25 <0.02 0.29 0.33 200 <10 <10 890 <0.1 0.0063 15832S/13E-30F02 11/21/2011 580 49 38 2.7 73 30 190 120 13 <1 0.07 <0.1 <0.01 0.022 0.34 190 <10 <10 870 <0.1 0.0069 14432S/13E-30F02 7/25/2011 590 52 46 5.1 73 31 190 134.3 13.19 <1 <0.1 0.127 <0.1 0.025 0.387 190 <5 <5 900 <0.1 0.0074 13532S/13E-30F02 4/20/2011 600 54 57 4.2 74 29 200 141 13 <1 0.18 0.17 <0.01 0.025 0.38 200 <2.0 <2.0 920 NA 0.0070 14232S/13E-30F02 1/24/2011 600 51 43 4.9 71 31 210 140 12 <1.0 0.15 0.12 0.27 0.041 0.3 210 <2.0 <2.0 920 <0.1 0.0059 17032S/13E-30F02 10/28/2010 610 49 38 2.3 70 30 210 130 11 <1.0 0.10 <0.1 NA 0.0094 <0.3 210 <10 <10 920 <0.1 NA NA32S/13E-30F02 7/26/2010 560 49 45.8 2.95 85.4 36.8 223 130 11 2.5 0.0928 < 0.10 0.13 0.0646 0.59 223 < 1.0 < 1.0 890 < 0.100 0.0120 8332S/13E-30F02 4/27/2010 634 51 50.3 3.12 87.9 38.6 225 130 10 0.8 0.112 < 0.10 < 0.10 0.615 0.51 225 < 1.0 < 1.0 880 3.28 0.0100 10032S/13E-30F02 1/28/2010 604 44 52.2 4.47 92.1 38.5 230 150 11 1.4 0.127 < 0.10 < 0.10 0.913 0.48 230 < 1.0 < 1.0 920 4.55 0.0109 9232S/13E-30F02 10/19/2009 566 49 49.5 2.80 88.3 37.6 240 140 11 1.0 0.0942 0.17 < 0.10 0.924 0.51 240 < 1.0 < 1.0 850 2.15 0.0104 9632S/13E-30F02 8/19/2009 614 49 51.8 3.19 87.3 36.8 225 130 11 2.00 NA 0.10 < 0.10 2.24 0.54 225 < 1.0 < 1.0 920 19.4 0.0110 9132S/13E-30F02 5/12/2009 514 54 48.7 3.26 81.1 34.9 206 120 NA NA NA 0.11 NA 1.87 0.53 206 < 1.0 < 1.0 890 3.23 0.0098 10232S/13E-30F02 3/27/1996 678 49 52 3.8 98 42 305 166 49 NA 0.16 NA NA NA NA NA NA NA NA NA NA NA32S/13E-30F02 6/9/1976 637 48 55 2.8 98 43 343 172 17.6 NA 0.1 0.5 NA NA NA NA NA NA NA NA NA NA32S/13E-30F02 1/20/1966 580 68 47 2 94 38 280 152 27 NA 0.08 0.2 NA NA NA NA NA NA NA NA NA NAP:\Portland\672ͲNorthernCitiesManagementArea\006Ͳ2019AnnualReport\WaterQuality\NCMA_WQ_SentryWells_thru2019.xlsx4/22/2020 AppendixA:NCMASentryWellsWaterQualityDataWell Date TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l umhos/cm mg/l32S/13E-30F03 10/14/2019 620 47 44 2.7 110 44 300 170 ND ND 0.064 0.12 0.035 0.021 0.16 300 ND ND 980 0.09 0.0034 29432S/13E-30F03 7/9/2019 650 47 41 2.5 110 49 310 170 ND 0.094 0.061 0.14 0.039 0.020 0.21 310 ND ND 975 0.04 0.0045 22432S/13E-30F03 4/10/2019 630 49 37 2.5 100 45 310 170 ND 0.140 0.060 0.14 0.030 0.020 0.19 310 ND ND 988 0.05 0.0039 25832S/13E-30F03 1/8/2019 660 48 39 2.6 110 46 310 170 ND 0.068 0.063 0.15 0.037 0.020 0.22 310 ND ND 990 0.08 0.0046 21832S/13E-30F03 10/10/2018 650 48 44 2.9 120 51 310 170 ND 0.12 0.067 0.10 0.036 0.022 0.16 310 ND ND 981 0.05 0.0033 30032S/13E-30F03 7/10/2018 630 49 42 2.6 110 49 310 170 ND ND 0.062 0.18 0.035 0.019 0.22 310 ND ND 1,030 ND 0.0045 22332S/13E-30F03 4/12/2018 640 45 43 2.6 110 46 300 160 ND 0.15 0.066 0.14 0.036 0.021 0.16 300 ND ND 980 0.035 0.0036 28132S/13E-30F03 1/11/2018 650 48 45 2.8 120 51 310 170 ND 0.13 0.044 0.15 0.041 0.021 0.26 310 ND ND 966 0.037 0.0054 18532S/13E-30F03 10/11/2017 660 47 42 2.6 110 50 320 170 ND 0.13 0.067 0.13 0.037 0.021 0.2 320 ND ND 996 0.056 0.0043 23532S/13E-30F03 7/12/2017 750 46 44 3 120 53 280 170 ND ND 0.064 0.14 0.035 0.023 0.2 280 ND ND 980 0.046 0.0043 23032S/13E-30F03 4/12/2017 640 48 45 2.9 120 51 310 170 ND ND 0.076 0.16 0.035 0.022 0.22 310 ND ND 9720.0650.0046 21832S/13E-30F031/10/2017 670 49 44 2.7 120 51 330 170 ND ND 0.064 0.13 0.045 0.023 0.31 330 ND ND 993 0.14 0.0063 15832S/13E-30F03 10/11/2016 680 48 41 2.6 110 49 320 170 ND 0.11 0.056 0.13 0.042 0.02 0.22 320 ND ND 992 ND 0.0046 21832S/13E-30F03 7/20/2016 660 47 44 2.9 110 51 320 170 <0.096 <0.080 0.062 0.12 0.032 0.023 0.20 320 <4.1 <4.1 992 0.04 0.0043 23532S/13E-30F03 4/13/2016 650 47 42 2.7 110 51 310 170 <0.096 0.2 0.072 0.13 0.028 0.021 0.22 310 <4.1 <4.1 981 0.03 0.0047 21432S/13E-30F03 1/14/2016 580 49 45 2.8 120 52 310 180 0.05 0.1 0.061 0.2 <0.010 0.025 0.21 310 <4.1 <4.1 947 0.054 0.0043 23332S/13E-30F03 10/14/2015 660 44 38 2.8 100 44 306 160 <0.05 <1 <0.05 0.13 0.028 0.021 0.10 306 <10 <10 990 <0.05 0.0023 44032S/13E-30F03 7/15/2015 670 45 45 1.9 120 51 305 170 <0.05 <1 0.060 0.11 0.03 0.019 <0.1 305 <10 <10 990 <0.05 NA NA32S/13E-30F03 4/15/2015 650 46 35 2.3 99 44 300 170 <0.05 <1 0.056 0.126 0.02 0.015 0.1 300 <10 <10 950 <0.05 NA NA32S/13E-30F03 1/14/2015 670 46 36 2.2 100 45 310 180 <0.05 <1 0.05 0.121 0.02 0.016 <0.1 310 <10 <10 950 0.01 NA NA32S/13E-30F03 10/14/2014 660 41 35 3.0 99 42 310 150 <0.05 <1 <0.05 <0.1 0.011 0.017 <0.1 310 <10 <10 990 <0.05 NA NA32S/13E-30F03 7/30/2014 660 44 38 2.6 96 46 300 160 <0.05 <1 0.28 0.12 0.02 0.015 <0.1 300 <10 <10 990 <0.05 NA NA32S/13E-30F03 4/16/2014 640 44 36 3.3 55 38 310 169 <0.05 <1 0.062 0.12 0.02 0.011 0.11 310 <10 <10 990 <0.05 0.0025 40032S/13E-30F03 1/15/2014 650 45 35 2.5 90 41 300 173 <0.05 <1 <0.05 0.13 0.01 0.015 0.12 300 <10 <10 990 <0.05 0.0027 37532S/13E-30F03 10/15/2013 670 41 40 2.7 100 44 280 179 <0.05 <1 <0.05 0.14 0.02 0.016 <0.1 280 <10 <10 990 <0.05 NA NA32S/13E-30F03 7/10/2013 650 50 33 2.4 100 43 290 140 13.5 <1 0.055 <0.1 0.02 0.017 0.23 290 <10 <10 990 <0.05 0.0046 21732S/13E-30F03 4/11/2013 670 45 36 2.7 94 42 300 170 <0.05 <1 0.06 0.13 0.02 0.016 0.12 300 <10 <10 990 <0.05 0.0027 37532S/13E-30F03 1/15/2013 630 45 36 2.3 92 41 295 180 <0.05 <1 0.06 0.11 <0.01 0.015 <0.1 295 <10 <10 980 <0.05 NA NA32S/13E-30F03 10/30/2012 650 43 40 3.1 100 46 280 170 <0.05 <1 0.06 <0.1 0.03 0.016 <0.1 280 <10 <10 990 0.02 NA NA32S/13E-30F03 7/24/2012 640 51 36 2.7 81 37 296 180 <0.05 <1 <0.1 0.17 <0.01 0.016 0.2 296 <10 <10 990 <0.05 0.0039 25532S/13E-30F03 4/19/2012 640 54 32 2.3 84 36 290 180 <0.1 <1 <0.1 <0.2 0.01 0.014 <0.2 290 <10 <10 990 <0.1 NA NA32S/13E-30F03 1/12/2012 660 46 39 2.1 94 42 280 160 <0.1 <1 <0.1 0.2 0.025 0.016 <0.2 280 <10 <10 990 <0.1 NA NA32S/13E-30F03 11/21/2011 650 43 33 2.6 93 39 290 160 <0.05 <1 0.04 0.15 0.028 0.016 <0.1 290 <10 <10 960 <0.1 NA NA32S/13E-30F03 7/25/2011 650 47 46 5.1 73 31 190 170.5 <0.05 <1 <0.1 0.155 0.02 0.025 <0.1 190 <5 <5 900 <0.1 NA NA32S/13E-30F03 4/21/2011 650 48 40 3.8 91 34 280 179 <0.05 <1 0.1 0.2 0.029 0.015 0.11 280 <2.0 <2.0 1,000 NA 0.0023 43632S/13E-30F03 1/24/2011 650 46 36 4.7 87 38 300 170 <0.05 <1.0 0.11 0.17 0.24 0.016 <0.1 300 <2.0 <2.0 990 <0.1 NA NA32S/13E-30F03 10/28/2010 650 46 37 2.7 100 43 280 160 <0.1 <1.0 0.10 <0.1 NA 0.032 <0.3 280 <10 <10 1,000 0.53 NA NA32S/13E-30F03 7/26/2010 608 45 43.8 2.94 107 46.8 294 160 1.3 0.84 0.0479 < 0.10 0.10 0.129 0.24 294 < 1.0 < 1.0 900 7.55 0.0053 18832S/13E-30F03 4/27/2010 668 48 40.8 2.91 101 44.7 304 160 0.21 0.84 0.0733 0.14 0.11 0.0694 0.23 304 < 1.0 < 1.0 940 2.62 0.0048 20932S/13E-30F03 1/28/2010 656 40 43.1 3.91 112 47.2 310 180 < 0.20 2.8 0.0833 0.13 < 0.10 0.287 0.21 310 < 1.0 < 1.0 980 4.80 0.0053 19032S/13E-30F03 10/19/2009 626 48 43.3 3.14 108 46.2 308 170 < 0.10 1.8 0.0646 0.22 < 0.10 0.255 0.17 308 < 1.0 < 1.0 910 2.09 0.0035 28232S/13E-30F03 8/19/2009 672 45 43.1 3.15 111 44.3 290 170 < 0.10 2.5 NA 0.14 < 0.10 0.468 0.19 290 < 1.0 < 1.0 980 18.5 0.0042 23732S/13E-30F03 5/12/2009 678 49 44.8 3.32 109 42.9 276 180 NA NA NA 0.17 NA 0.146 0.18 276 < 1.0 < 1.0 960 1.16 0.0037 27232S/13E-30F03 3/27/1996 686 41 40 3.4 109 48 379 197 0.2 NA 0.13 NA NA NA NA NA NA NA NA NA NA NA32S/13E-30F03 6/7/1976 616 43 41 2.6 96 49 333 190 0.4 NA 0.05 0.5 NA NA NA NA NA NA NA NA NA NA32S/13E-30F03 1/19/1966 642 69 49 4 109 40 321 182 1 NA 0.05 0.3 NA NA NA NA NA NA NA NA NA NAP:\Portland\672ͲNorthernCitiesManagementArea\006Ͳ2019AnnualReport\WaterQuality\NCMA_WQ_SentryWells_thru2019.xlsx4/22/2020 AppendixA:NCMASentryWellsWaterQualityDataWell Date TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l umhos/cm mg/l32S/13E-30N01 10/15/2019 830 150 110 32.0 86 57.0 330 170 ND 0.66 0.22 0.32 0 0.12 1.30 330 ND ND 1,340 2.6 0.0087 11532S/13E-30N01 4/9/2019 860 160 94 30.0 81 59.0 310 180 ND 0.64 0.23 0.36 0 0.11 1.20 310 ND ND 1,370 2.8 0.0075 13332S/13E-30N01 10/10/2018 920 200 130 36.0 96 73.0 370 140 ND 0.62 0.21 0.36 0 0.14 0.85 370 ND ND 1,500 3.0 0.0043 23532S/13E-30N01 4/11/2018 800 140 110 31 73 55 290 150 ND 0.73 0.2 0.36 0.017 0.1 1.1 290 ND ND 1,280 2.4 0.0079 12732S/13E-30N01 10/11/2017 870 150 120 31.0 78 57.0 320 170 ND 0.68 0.24 0.38 0 0.12 1.50 320 ND ND 1,350 3.0 0.0100 10032S/13E-30N01 4/11/2017 960 260 160 35.0 92 73.0 350 150 ND 0.84 0.23 0.42 0 0.14 1.50 350 ND ND 1,690 3.9 0.0058 17332S/13E-30N01 10/12/2016 900 180 130 32.0 77 61.0 290 180 ND 0.53 0.19 0.34 0 0.11 1.70 290 ND ND 1,420 2.7 0.0094 10632S/13E-30N01 4/12/2016 790 110 110 27.0 55 46.0 230 190 0.2 0.51 0.18 0.42 0 0.07 1.70 230 <8.2 <8.2 1,190 1.7 0.0155 6532S/13E-30N01 10/15/2015 740 120 100 27.0 52 41.0 250 190 <0.05 <1 0.18 0.43 0 0.07 1.30 250 <10 <10 1,220 1.8 0.0108 9232S/13E-30N01 4/14/2015 930 190 130 28.0 69 54.0 360 170 <0.05 1.40 0.23 0.33 0 0.09 1.20 360 <10 <10 1,500 2.5 0.0063 15832S/13E-30N01 1/14/2015 845 170 110 29.0 71 54.0 320 180 <0.05 <1 0.21 0.33 0 0.09 1.21 320 <10 <10 1,360 2.3 0.0071 14032S/13E-30N01 10/15/2014 790 140 110 30.0 62 53.0 300 160 0.7 <1 0.21 0.29 <0.01 0.08 1.20 300 <10 <10 1,350 2.5 0.0086 11732S/13E-30N01 7/30/2014 800 150 110 27.0 61 52.0 310 160 <0.05 <1 0.81 0.33 0 0.08 1.10 310 <10 <10 1,360 2.4 0.0073 13632S/13E-30N01 4/16/2014 850 160 112 26.0 55 43.0 310 170 <0.05 <1 0.20 0.33 0 0.08 1.30 310 <10 <10 1,410 2.4 0.0081 12332S/13E-30N01 1/15/2014 790 154 110 26.0 56 45.0 260 190 <0.05 <1 0.19 0.41 <0.01 0.08 1.40 260 <10 <10 1,340 2.5 0.0091 11032S/13E-30N01 10/15/2013 950 200 140 32.0 74 60.0 330 180 <0.05 <1 0.21 0.33 0 0.10 1.30 330 <10 <10 1,570 2.8 0.0065 15432S/13E-30N01 7/10/2013 830 175 120 29.0 71 54.0 310 185 <0.05 <1 0.22 0.32 0 0.09 0.84 310 <10 <10 1,430 2.3 0.0048 20832S/13E-30N01 4/10/2013 860 180 120 29.0 67 54.0 320 180 <0.05 1.10 0.21 0.31 0 0.09 1.20 320 <10 <10 1,470 2.5 0.0067 15032S/13E-30N01 1/14/2013 800 170 120 32.0 66 53.0 280 200 <0.05 1.10 0.22 0.26 <0.01 0.09 1.20 280 <10 <10 1,380 2.5 0.0071 14232S/13E-30N01 10/29/2012 900 180 120 34.0 77 60.0 300 190 <0.05 <1 0.21 0.40 0 0.10 1.20 300 <10 <10 1,500 2.8 0.0067 15032S/13E-30N01 7/23/2012 840 190 120 31.0 56 45.0 266 200 <0.05 <1 0.22 0.43 <0.01 0.10 1.20 266 <10 <10 1,370 2.3 0.0063 15832S/13E-30N01 4/18/2012 1,050 280 140 31.0 59 47.0 330 210 <0.1 1.40 0.20 0.50 <0.01 0.08 1.30 330 <10 <10 1,680 2.4 0.0046 21532S/13E-30N01 1/9/2012 1,050 260 170 34.0 68 52.0 307 200 <0.05 2.70 0.21 0.41 <0.01 0.09 1.90 307 <10 <10 1,760 2.9 0.0073 13732S/13E-30N01 11/17/2011 1,300 360 320 40.0 90 69.0 390 220 <0.1 <1 0.23 0.38 0 0.11 2.50 390 <10 <10 2,210 3.4 0.0069 14432S/13E-30N01 7/25/2011 1,680 445 230 42.0 99 81.0 380 256 <0.05 1.20 0.21 <0.1 <0.01 0.12 3.02 380 <5 <5 2,480 4.2 0.0068 14832S/13E-30N01 4/20/2011 890 210 130 26.0 68 46.0 180 215 <0.05 <1 0.24 0.39 0 0.09 4.57 180 <2.0 <2.0 1,550 NA 0.0218 4632S/13E-30N01 1/24/2011 870 180 100 28.0 84 46.0 240 210 <0.05 <1.0 <0.1 0.34 0 0.24 3.63 240 <2.0 <2.0 1,430 18.0 0.0202 5032S/13E-30N01 10/21/2010 890 190 120 26.0 58 45.0 246 200 <0.1 <1.0 <0.1 0.37 NA 0.08 2.30 246 <10 <10 1,498 <0.1 0.0121 8332S/13E-30N01 7/27/2010 917 200 130 30.0 75 56.2 241 220 < 0.10 < 0.50 0.17 0.29 0 0.10 2.80 241 < 1.0 < 1.0 1,400 2.6 0.0140 7132S/13E-30N01 4/27/2010 808 150 130 29.0 136 55.6 286 210 0.8 1.70 0.17 0.37 0 0.28 2.60 286 < 1.0 < 1.0 1,300 20.4 0.0173 5832S/13E-30N01 1/26/2010 902 210 155 33.5 156 66.4 307 230 < 0.10 1.70 0.32 0.30 0 0.33 3.20 307 < 1.0 < 1.0 1,500 27.3 0.0152 6632S/13E-30N01 10/20/2009 828 200 159 34.3 118 59.8 238 230 < 0.10 1.30 0.24 0.38 < 0.10 0.16 3.20 238 < 1.0 < 1.0 1,300 5.3 0.0160 6332S/13E-30N01 8/20/2009 835 160 150 27.8 121 49.4 235 220 < 0.10 1.30 NA 0.37 0 0.23 2.90 235 < 1.0 < 1.0 1,400 15.9 0.0181 5532S/13E-30N01 5/11/2009 960 180 175 33.5 87 46.2 274 220 NA NA NA 0.36 NA 0.11 3.20 274 < 1.0 < 1.0 1,500 2.3 0.0178 56P:\Portland\672ͲNorthernCitiesManagementArea\006Ͳ2019AnnualReport\WaterQuality\NCMA_WQ_SentryWells_thru2019.xlsx4/22/2020 AppendixA:NCMASentryWellsWaterQualityDataWell Date TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l umhos/cm mg/l32S/13E-30N03 10/15/2019 560 67 60 3.2 76 31.0 150 140 17.0 0.14 0.09 0.17 ND 0.11 0.86 150 ND ND 875 0.150 0.0128 7832S/13E-30N03 7/9/2019 640 67 55 3.0 72 33.0 140 130 16.0 0.14 0.08 0.18 ND ND 0.77 140 ND ND 860 ND 0.0115 8732S/13E-30N03 4/9/2019 580 71 51 3.1 68 30.0 150 130 16.0 0.18 0.09 0.18 ND 0.03 0.60 150 ND ND 867 ND 0.0085 11832S/13E-30N03 1/9/2019 560 69 54 3.2 72 31.0 150 130 16.0 0.08 0.09 0.20 ND ND 0.71 150 ND ND 858 ND 0.0103 9732S/13E-30N03 10/10/2018 540 68 59 3.4 71 32.0 150 130 16.0 ND 0.09 0.21 ND 0.01 0.53 150 ND ND 847 0.030 0.0078 12832S/13E-30N03 7/12/2018 550 62 54 3.2 69 31 150 120 15 0.16 0.084 0.17 ND 0.063 0.61 150 ND ND 866 0.076 0.0098 10232S/13E-30N03 4/11/2018 590 62 58 3.3 72 33 150 120 14 0.19 0.094 0.16 ND 0.006 0.51 150 ND ND 839 ND 0.0082 12232S/13E-30N03 1/11/2018 580 64 61 3.3 74 34 150 140 14 0.20 0.09 0.19 ND 0.33 0.61 150 ND ND 836 0.120 0.0095 10532S/13E-30N03 10/11/2017 580 63 54 3.2 73 33.0 150 130 15.0 0.24 0.10 0.16 ND 0.86 0.64 150 ND ND 836 0.590 0.0102 9832S/13E-30N03 7/11/2017 560 64 60 3.2 77 34.0 150 140 14.0 0.10 0.09 0.14 ND 0.54 0.66 150 ND ND 871 0.180 0.0103 9732S/13E-30N03 4/11/2017 560 69 62 3.6 82 36.0 160 140 14.0 0.12 0.08 0.15 ND 0.62 0.69 160 ND ND 866 0.430 0.0100 10032S/13E-30N03 1/12/2017 580 69 62 3.6 83 38.0 170 150 14.0 0.13 0.09 0.13 ND 3.30 0.74 170 ND ND 878 1.500 0.0107 9332S/13E-30N03 10/12/2016 580 68 62 3.5 80 37.0 170 140 15.0 ND 0.09 0.16 ND 0.56 0.76 170 ND ND 879 0.170 0.0112 8932S/13E-30N03 7/19/2016 580 66 61 3.6 75 36.0 160 130 65.0 0.20 0.08 0.16 <0.010 0.03 0.76 160 <4.1 <4.1 864 <0.030 0.0115 8732S/13E-30N03 4/12/2016 610 69 60 3.4 75 36.0 160 130 64.0 0.16 0.08 0.18 <0.010 0.01 0.78 160 <4.1 <4.1 895 <0.05 0.0113 8832S/13E-30N03 1/13/2016 570 72 62 3.4 77 35.0 160 140 15.0 0.15 0.08 0.22 <0.010 0.01 0.66 160 <4.1 <4.1 867 0.079 0.0092 10932S/13E-30N03 10/15/2015 570 63 54 3.3 69 32.0 162 130 15.0 <1 0.02 0.23 <0.01 0.02 0.56 162 <10 <10 860 <0.05 0.0089 11332S/13E-30N03 7/16/2015 580 65 65 3.0 81 35.0 160 140 15.0 15.30 0.08 0.14 0 0.01 0.46 160 <10 <10 880 <0.05 0.0071 14132S/13E-30N03 4/14/2015 580 65 49 2.9 65 31.0 160 140 15.2 <1 0.08 <0.1 <0.01 <0.005 0.47 160 <10 <10 860 <0.05 0.0072 13832S/13E-30N03 1/14/2015 610 68 53 3.0 73 34.0 170 150 15.3 <1 0.07 0.15 <0.01 0.05 0.43 170 <10 <10 870 0.490 0.0063 15832S/13E-30N03 10/15/2014 560 59 52 3.5 67 32.0 160 130 14.0 0.54 0.07 0.14 <0.01 <0.005 0.45 160 <10 <10 890 <0.05 0.0077 13132S/13E-30N03 7/30/2014 580 65 55 3.2 69 32.0 170 130 15.0 <1 <0.1 0.16 <0.01 <0.005 0.34 170 <10 <10 910 <0.05 0.0052 19132S/13E-30N03 4/16/2014 610 63 55 4.3 65 29.0 170 140 13.0 <1 0.08 0.15 <0.01 0.06 0.38 170 <10 <10 910 <0.05 0.0060 16632S/13E-30N03 1/15/2014 610 66 54 3.2 67 31.0 170 149 14.8 15.00 <0.1 0.16 <0.01 0.07 0.46 170 <10 <10 910 0.270 0.0070 14332S/13E-30N03 10/15/2013 580 60 57 3.3 71 32.0 170 150 14.0 <1 0.06 0.16 <0.01 0.37 0.41 170 <10 <10 910 0.100 0.0068 14632S/13E-30N03 7/10/2013 590 60 48 3.1 71 31.0 160 150 15.1 <1 0.07 0.18 <0.01 1.30 0.17 160 <10 <10 900 0.430 0.0028 35332S/13E-30N03 4/10/2013 600 66 53 3.3 69 31.0 160 150 15.0 <1 0.11 0.18 <0.01 0.06 0.35 160 <10 <10 910 <0.05 0.0053 18932S/13E-30N03 1/14/2013 570 66 55 3.4 68 30.0 165 150 14.8 <1 0.09 0.17 <0.01 0.03 0.27 165 <10 <10 900 0.084 0.0041 24432S/13E-30N03 10/29/2012 610 60 56 3.7 74 33.0 155 148 14.0 <1 0.08 0.20 <0.01 0.03 0.30 155 <10 <10 900 0.040 0.0050 20032S/13E-30N03 7/23/2012 600 71 56 3.5 61 28.0 152 200 <0.05 <1 0.10 <0.1 <.002 0.12 0.30 152 <10 <10 890 0.440 0.0042 23732S/13E-30N03 4/18/2012 570 80 47 3.0 57 25.0 150 150 16.0 <1 0.10 0.30 <0.01 <0.005 0.28 150 <10 <10 880 <0.1 0.0035 28632S/13E-30N03 1/11/2012 570 67 55 3.9 68 30.0 140 130 14.0 <1 0.10 0.22 <0.02 0.05 0.39 140 <10 <10 870 0.170 0.0058 17232S/13E-30N03 11/21/2011 600 67 47 3.2 64 28.0 140 130 15.0 1.20 0.09 0.23 <0.01 <0.005 0.62 140 <10 <10 850 <0.1 0.0093 10832S/13E-30N03 7/25/2011 590 67 47 5.0 54 24.0 290 140 15.4 <1 <0.1 0.19 <0.01 0.05 0.79 290 <5 <5 890 0.140 0.0118 8532S/13E-30N03 4/20/2011 580 76 58 4.2 62 23.0 140 142 16.0 <1 0.12 0.24 <0.1 0.05 0.92 140 <2.0 <2.0 890 NA 0.0121 8332S/13E-30N03 1/24/2011 570 76 48 4.8 55 25.0 130 130 16.0 <1.0 0.12 0.20 <0.10 0.01 1.70 130 <2.0 <2.0 900 <0.1 0.0224 4532S/13E-30N03 10/21/2010 550 69 59 3.3 65 31.0 133 130 15.0 <1.0 <0.1 0.10 NA <0.005 1.10 133 <10 <10 886 <0.1 0.0159 6332S/13E-30N03 7/27/2010 528 72 55 3.4 69 31.0 139 130 15.0 < 0.50 0.07 0.14 0 < 0.00500 1.30 139 < 1.0 < 1.0 860 < 0.100 0.0181 5532S/13E-30N03 4/27/2010 672 89 61 3.7 71 32.5 134 130 14.0 < 0.50 0.08 0.18 0 < 0.00500 1.20 134 < 1.0 < 1.0 870 < 0.100 0.0135 7432S/13E-30N03 1/26/2010 606 110 75 4.5 78 34.3 126 130 14.0 1.40 0.07 0.15 < 0.10 0.01 1.30 126 < 1.0 < 1.0 990 0.653 0.0118 8532S/13E-30N03 10/20/2009 806 180 93 25.5 92 41.5 162 150 9.7 2.20 0.11 0.26 < 0.10 0.25 1.40 162 < 1.0 < 1.0 1,200 0.344 0.0078 12932S/13E-30N03 8/20/2009 1,070 190 151 61.6 112 44.2 130 130 16.0 3.40 NA 0.20 < 0.10 0.15 1.60 130 < 1.0 < 1.0 1,700 1.930 0.0084 11932S/13E-30N03 5/12/2009 602 97 63 4.0 73 32.2 122 120 NA NA NA 0.22 NA 24.00 1.20 122 < 1.0 < 1.0 900 2.240 0.0124 8132S/13E-30N03 3/27/1996 624 70 62 4.0 78 35.0 150 161 106.8 NA 0.13 NA NA NA NA NA NA NA NA NA NA NA32S/13E-30N03 6/7/1976 705 90 54 2.9 99 43.0 189 168 112.5 NA 0.08 0.50 NA NA NA NA NA NA NA NA NA NA32S/13E-30N03 1/21/1966 804 57 54 3.0 132 59.0 410 250 1.0 NA 0.08 0.50 NA NA NA NA NA NA NA NA NA NAP:\Portland\672ͲNorthernCitiesManagementArea\006Ͳ2019AnnualReport\WaterQuality\NCMA_WQ_SentryWells_thru2019.xlsx4/22/2020 AppendixA:NCMASentryWellsWaterQualityDataWell Date TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l umhos/cm mg/l32S/13E-30N02 10/15/2019 1,000 49 77 4.8 160 58.0 190 510 0.2 0.10 0.16 0.09 ND ND 0.17 190 ND ND 1,350 0.150 0.0035 28832S/13E-30N02 7/9/2019 940 48 73 4.6 150 64.0 190 470 0.2 0.45 0.15 0.10 ND ND 0.12 190 ND ND 1,340 ND 0.0025 40032S/13E-30N02 4/9/2019 1,000 50 64 4.6 140 56.0 190 480 0.2 0.14 0.15 0.12 ND ND 0.14 190 ND ND 1,350 0.040 0.0028 35732S/13E-30N02 1/9/2019 960 50 67 4.6 150 59.0 190 490 0.2 0.19 0.15 0.12 ND ND 0.16 190 ND ND 1,360 ND 0.0032 31332S/13E-30N02 10/10/2018 940 50 75 4.9 150 64.0 190 500 0.2 0.16 0.16 0.07 ND ND 0.09 190 ND ND 1,340 0.220 0.0017 58132S/13E-30N02 7/12/2018 1,000 47 66 4.5 140 59 190 480 0.19 0.19 0.14 0.099 ND ND 0.12 190 ND ND 1,390 0.17 0.0026 39232S/13E-30N02 4/11/2018 1,100 46 76 4.9 160 65 190 480 0.17 0.15 0.16 0.097 ND 0.007 0.14 190 ND ND 1,350 0.41 0.0030 32932S/13E-30N02 1/11/2018 980 49 77 4.6 150 63 190 510 0.19 0.10 0.15 0.13 ND ND 0.16 190 ND ND 1,330 0.2 0.0033 30632S/13E-30N02 10/11/2017 1,000 46 70 4.8 160 65.0 200 510 0.2 0.19 0.17 0.11 ND 0.01 0.27 200 ND ND 1,340 0.280 0.0059 17032S/13E-30N02 7/11/2017 1,100 49 74 4.8 150 64.0 190 480 0.2 0.13 0.15 0.08 ND 0.02 0.16 190 ND ND 1,360 2.000 0.0033 30632S/13E-30N02 4/11/2017 980 50 74 4.8 160 64.0 190 510 0.2 0.12 0.14 0.14 ND ND 0.18 190 ND ND 1,320 0.220 0.0036 27832S/13E-30N02 1/13/2017 980 49 80 5.1 170 69.0 200 490 0.2 0.12 0.16 0.08 ND 0.01 0.16 200 ND ND 1,340 0.630 0.0033 30632S/13E-30N02 10/12/2016 1,000 50 77 5.0 160 69.0 200 500 0.2 ND 0.15 0.11 ND ND 0.27 200 ND ND 1,370 ND 0.0054 18532S/13E-30N02 7/19/2016 1,000 48 78 5.0 160 68.0 200 500 1.0 0.17 0.15 0.11 <0.010 <0.0040 0.20 200 <8.2 <8.2 1,350 <0.030 0.0042 24032S/13E-30N02 4/12/2016 1,000 44 72 4.8 150 67.0 190 470 1.0 <0.080 0.14 0.10 <0.010 <0.0040 0.21 190 <8.2 <8.2 1,390 <0.030 0.0048 21032S/13E-30N02 1/13/2016 990 48 74 4.9 150 64.0 190 520 0.3 0.12 0.14 0.22 <0.010 <0.0040 <0.046 190 <8.2 <8.2 1,300 0.041 NA NA32S/13E-30N02 10/15/2015 1,040 47 64 4.6 140 60.0 192 480 0.7 <1 0.13 0.18 <0.01 <0.005 <0.10 192 <10 <10 1,350 <0.05 NA NA32S/13E-30N02 7/16/2015 1,030 49 82 4.4 170 70.0 190 480 1.4 1.52 0.15 <0.1 <0.01 <0.005 0.11 190 <10 <10 1,360 <0.05 0.0022 44532S/13E-30N02 4/14/2015 840 47 61 4.3 130 58.0 190 500 0.6 <1 0.14 <0.3 <0.01 <0.005 <0.3 190 <10 <10 1,330 <0.05 NA NA32S/13E-30N02 1/14/2015 1,050 50 62 4.2 140 59.0 190 520 0.4 <1 0.13 0.12 <0.01 <0.005 <0.1 190 <10 <10 1,320 <0.05 NA NA32S/13E-30N02 10/15/2014 1,040 44 65 5.0 140 58.0 200 440 0.8 <1 0.13 <0.1 <0.01 <0.005 <0.1 200 <10 <10 1,370 <0.05 NA NA32S/13E-30N02 7/30/2014 1,020 45 66 4.6 140 60.0 220 470 0.5 <1 0.10 0.13 <0.01 <0.005 <0.4 220 <10 <10 1,340 <0.05 NA NA32S/13E-30N02 4/16/2014 1,040 46 66 5.0 120 50.0 190 520 0.5 <1 0.14 0.10 <0.01 <0.005 <0.1 190 <10 <10 1,350 <0.05 NA NA32S/13E-30N02 1/15/2014 1,060 45 60 4.1 120 49.0 190 477 0.7 1.10 0.13 0.43 <0.01 <0.005 <0.2 190 <10 <10 1,370 <0.05 NA NA32S/13E-30N02 10/15/2013 1,030 46 70 4.9 140 58.0 190 541 0.5 <1 0.12 0.18 <0.01 <0.005 <0.2 190 <10 <10 1,360 <0.05 NA NA32S/13E-30N02 7/10/2013 1,020 50 61 4.5 140 59.0 185 500 0.6 <1 0.14 0.12 <0.01 <0.005 <0.1 185 <10 <10 1,370 <0.05 NA NA32S/13E-30N02 4/10/2013 1,080 48 60 4.3 120 52.0 185 500 0.5 <1 0.15 <0.2 <0.01 <0.005 <0.2 185 <10 <10 1,360 <0.05 NA NA32S/13E-30N02 1/14/2013 1,010 48 63 4.5 120 53.0 188 530 0.4 <1 0.14 <0.2 <0.01 <0.005 <0.2 188 <10 <10 1,350 0.068 NA NA32S/13E-30N02 10/29/2012 1,030 40 68 5.0 140 58.0 180 500 <0.25 <1 0.14 <0.5 <0.01 <0.005 <0.5 180 <10 <10 1,360 <0.05 NA NA32S/13E-30N02 7/23/2012 1,040 54 63 4.5 110 48.0 188 510 0.1 <1 0.15 0.15 <0.01 0.01 <0.1 188 <10 <10 1,360 <0.05 NA NA32S/13E-30N02 4/18/2012 990 60 56 4.2 110 47.0 190 560 0.1 <1 0.12 0.21 <0.01 <0.005 0.28 190 <10 <10 1,360 <0.1 0.0047 21432S/13E-30N02 1/11/2012 1,040 49 64 4.9 130 54.0 180 460 1.3 <1 0.17 0.16 <0.02 <0.005 <0.2 180 <10 <10 1,360 <0.1 NA NA32S/13E-30N02 11/21/2011 1,020 46 57 4.5 130 54.0 180 450 0.2 <1 0.15 <0.2 <0.01 <0.005 <0.2 180 <10 <10 1,360 <0.1 NA NA32S/13E-30N02 7/25/2011 1,050 50 81 7.7 150 62.0 180 479 0.2 <1 0.16 0.14 <0.01 0.01 <0.1 180 <5 <5 1,370 0.490 NA NA32S/13E-30N02 4/20/2011 1,030 52 63 5.4 130 44.0 180 508 0.2 <1 0.19 0.20 <0.01 <0.005 <0.1 180 <2.0 <2.0 1,380 NA NA NA32S/13E-30N02 1/24/2011 1,050 50 60 6.4 120 49.0 190 490 0.2 <1.0 0.17 0.17 <0.10 0.06 <0.1 190 <2.0 <2.0 1,380 0.120 NA NA32S/13E-30N02 10/21/2010 1,040 48 52 3.5 100 45.0 181 460 0.2 <1.0 <0.1 <0.1 NA <0.005 <0.3 181 <10 <10 1,377 <0.1 NA NA32S/13E-30N02 7/27/2010 777 57 68 7.3 141 58.5 190 470 0.3 3.50 0.14 < 0.10 0 0.10 0.28 190 < 1.0 < 1.0 1,300 3.430 0.0049 20432S/13E-30N02 4/27/2010 800 93 72 12.5 108 46.3 159 300 7.0 3.20 0.12 0.13 0 0.08 0.70 159 < 1.0 < 1.0 1,100 3.270 0.0075 13332S/13E-30N02 2/25/2010 1,000 48 71 4.7 141 58.1 195 490 0.2 < 0.50 0.15 0.15 < 0.10 0.04 0.16 195 < 1.0 < 1.0 1,300 3.300 0.0033 30032S/13E-30N02 2/25/2010 1,010 74 77 10.2 138 55.8 195 440 0.1 2.40 0.14 0.16 < 0.10 0.06 0.24 195 < 1.0 < 1.0 1,400 1.690 0.0032 30832S/13E-30N02 1/26/2010 970 50 74 4.8 152 62.2 195 510 0.1 < 0.50 0.13 0.11 < 0.10 < 0.00500 0.16 195 < 1.0 < 1.0 1,300 < 0.100 0.0032 31332S/13E-30N02 10/20/2009 2,080 690 274 151.0 239 101.0 220 400 < 0.10 7.00 0.20 0.16 1 0.40 2.00 220 < 1.0 < 1.0 2,800 5.500 0.0029 34532S/13E-30N02 8/20/2009 1,350 500 199 82.2 123 49.0 199 220 6.4 6.30 NA 0.23 0 0.34 2.80 199 < 1.0 < 1.0 2,100 4.910 0.0056 17932S/13E-30N02 5/11/2009 1,290 170 129 52.0 137 66.9 176 470 NA NA NA 0.18 NA 0.13 0.56 176 < 1.0 < 1.0 1,800 5.240 0.0033 30432S/13E-30N02 3/27/1996 1,050 50 71 5.5 145 60.0 243 516 0.9 NA 0.23 NA NA NA NA NA NA NA NA NA NA NA32S/13E-30N02 6/7/1976 1,093 48 62 4.7 150 60.0 248 484 0.0 NA 0.13 0.70 NA NA NA NA NA NA NA NA NA NA32S/13E-30N02 1/21/1966 1,069 54 71 5.0 148 63.0 232 483 0.0 NA 0.12 0.50 NA NA NA NA NA NA NA NA NA NAP:\Portland\672ͲNorthernCitiesManagementArea\006Ͳ2019AnnualReport\WaterQuality\NCMA_WQ_SentryWells_thru2019.xlsx4/22/2020 AppendixA:NCMASentryWellsWaterQualityDataWell Date TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l umhos/cm mg/l32S/13E-31H10 10/14/2019 630 34 42 3.9 110 52.0 350 150 ND ND 0.08 0.14 ND 0.20 ND 350 ND ND 974 6.600 NA NA32S/13E-31H10 7/9/2019 650 44 50 3.4 110 57.0 320 200 ND 0.24 0.09 0.18 0 0.21 0.19 320 ND ND 1,030 6.000 0.0043 23232S/13E-31H10 4/9/2019 630 43 48 3.4 100 50.0 320 200 ND 0.17 0.10 0.21 0 0.18 0.15 320 ND ND 1,040 4.800 0.0035 28732S/13E-31H10 1/8/2019 620 35 41 3.3 100 54.0 340 160 ND 0.17 0.08 0.18 0 0.16 0.14 340 ND ND 973 5.600 0.0040 25032S/13E-31H10 10/9/2018 590 33 45 5.3 88 54.0 330 120 ND 0.20 0.08 0.11 0 0.16 0.08 330 ND ND 916 6.5 0.0023 42932S/13E-31H10 7/12/2018 510 34 46 6.0 45 54 300 96 ND 0.23 0.080 0.12 0.012 0.12 0.16 300 ND ND 846 3.8 0.0047 21332S/13E-31H10 4/10/2018 690 41 51 3.5 120 55 310 200 ND 0.16 0.089 0.19 0.016 0.21 0.15 310 ND ND 1,020 4.7 0.0037 27332S/13E-31H10 1/10/2018 660 35 44 3.3 110 56 350 170 ND 0.23 0.075 0.20 0.016 0.2 0.17 350 ND ND 1,020 5.3 0.0049 20632S/13E-31H10 10/11/2017 640 33 41 3.1 120 57.0 360 160 ND 0.38 0.08 0.18 ND 0.21 0.13 450 89 ND 1,070 4.3 0.0039 25432S/13E-31H10 7/11/2017 720 36 48 3.8 120 60.0 350 170 ND 0.17 0.09 0.15 0 0.17 0.13 350 ND ND 1,020 4.7 0.0036 27732S/13E-31H10 4/12/2017 600 39 47 3.4 120 62.0 340 190 ND ND 0.09 0.19 0 0.19 0.22 340 ND ND 1,020 5.2 0.0056 17732S/13E-31H10 1/13/2017 670 34 45 3.4 130 60.0 370 180 ND 0.16 0.08 0.17 0 0.22 0.10 370 ND ND 1,020 7.8 0.0029 34032S/13E-31H10 10/12/2016 700 33 40 3.2 120 59.0 380 170 ND 0.22 0.06 0.18 0 0.15 0.12 380 ND ND 1,040 5.3 0.0036 27532S/13E-31H10 7/20/2016 630 33 42 4.4 99 57.0 370 150 <0.096 0.30 0.07 0.14 <0.01 0.19 0.14 370 <8.2 <8.2 991 8.9 0.0042 23632S/13E-31H10 4/13/2016 670 37 46 3.4 120 57.0 350 180 <0.096 0.21 0.08 0.19 0 0.23 0.14 350 <8.2 <8.2 1,030 6.7 0.0038 26432S/13E-31H10 1/13/2016 380 37 49 9.9 7 46.0 170 54 <0.022 0.43 0.04 0.09 0 0.08 0.19 210 34 <4.1 603 2.2 0.0051 19532S/13E-31H10 10/14/2015 320 32 33 2.7 17 48.0 216 68 <0.05 <1 0.09 0.12 0 0.10 <0.10 227 11 <10 600 1.4 NA NA32S/13E-31H10 7/15/2015 330 34 44 3.4 15 54.0 195 81 <0.05 <1 0.08 <0.1 <0.01 0.08 <0.1 213 18 <10 610 1.0 NA NA32S/13E-31H10 4/16/2015 660 35 33 2.7 99 48.0 360 170 <0.05 <1 0.08 0.16 <0.01 0.17 <0.1 360 <10 <10 1,000 4.6 NA NA32S/13E-31H10 1/14/2015 760 55 56 3.0 110 50.0 300 250 <0.05 <1 0.11 0.16 0 0.17 <0.1 300 <10 <10 1,070 4.2 NA NA32S/13E-31H10 10/16/2014 720 41 46 3.7 110 53.0 330 200 <0.05 <1 0.10 <0.1 <0.01 0.17 <0.1 330 <10 <10 1,090 6.5 NA NA32S/13E-31H10 7/30/2014 660 34 35 2.4 95 49.0 420 160 <0.05 <1 <0.1 0.16 <0.01 0.17 <0.1 420 <10 <10 1,040 6.5 NA NA32S/13E-31H10 4/17/2014 890 55 70 5.4 100 45.0 250 380 <0.05 <1 0.15 0.12 0 0.31 0.13 250 <10 <10 1,260 4.9 0.0024 42332S/13E-31H10 1/16/2014 900 57 66 4.6 110 50.0 240 360 <0.05 <1 0.18 0.20 0 0.32 <0.1 240 <10 <10 1,260 6.0 NA NA32S/13E-31H10 10/16/2013 690 30 40 3.4 100 49.0 340 190 <0.05 <1 0.09 0.14 <0.01 0.23 <0.1 340 <10 <10 1,050 7.4 NA NA32S/13E-31H10 7/11/2013 860 60 50 4.4 110 47.0 240 340 <0.05 <1 0.18 0.15 0 0.28 <0.1 240 <10 <10 1,230 4.9 NA NA32S/13E-31H10 4/11/2013 900 60 69 4.6 110 47.0 250 350 0.8 <1 0.20 0.12 0 0.28 <0.2 250 <10 <10 1,250 5.7 NA NA32S/13E-31H10 1/16/2013 820 66 76 5.0 100 47.0 260 320 <0.1 <1 0.21 0.13 <0.01 0.31 <0.2 260 <10 <10 1,230 4.2 NA NA32S/13E-31H10 10/30/2012 780 65 75 4.7 100 46.0 255 280 <0.05 <1 0.19 0.14 0 0.23 <0.1 255 <10 <10 1,190 4.0 NA NA32S/13E-31H10 7/25/2012 830 76 80 5.3 96 45.0 250 310 <0.05 <1 0.22 0.15 0 0.24 <0.1 250 <10 <10 1,220 6.7 NA NA32S/13E-31H10 4/19/2012 790 87 69 4.5 52 37.0 250 270 <0.1 <1 0.19 0.21 0 0.17 <0.2 250 <10 <10 1,180 4.0 NA NA32S/13E-31H10 1/12/2012 760 76 85 4.0 79 40.0 270 190 <0.1 <1 0.23 0.21 0 0.23 <0.2 270 <10 <10 1,150 4.8 NA NA32S/13E-31H10 11/21/2011 720 39 38 3.4 96 43.0 320 180 <0.05 3.50 0.08 0.19 0 0.17 <0.1 320 <10 <10 1,050 4.8 NA NA32S/13E-31H10 7/25/2011 760 69 66 6.4 80 35.0 310 209 <0.05 <1 0.16 0.17 0 0.23 0.20 310 <5 <5 1,170 5.3 0.0029 34832S/13E-31H10 1/24/2011 310 98 22 8.1 34 9.2 19 53 <0.05 <1.0 <0.1 0.20 4 0.40 0.63 19 <2.0 <2.0 480 10.0 0.0064 15632S/13E-31H10 10/28/2010 290 81 26 9.3 64 11.0 160 68 <0.1 <1.0 <0.1 0.20 NA 0.85 0.36 160 <10 <10 520 38.0 0.0044 22532S/13E-31H10 7/26/2010 438 85 34 1.9 62 30.4 30 210 < 0.10 < 0.50 0.04 0.58 0 1.46 0.32 30 < 1.0 < 1.0 690 35.5 0.0038 26632S/13E-31H10 4/26/2010 560 83 48 5.7 86 48.3 62 310 < 0.10 0.84 < 0.02 < 0.1 1 2.54 0.31 62 < 1.0 < 1.0 880 233.0 0.0037 26832S/13E-31H10 1/27/2010 460 130 45 25.4 682 124.0 112 100 0.6 NA < 0.0200 0.21 0 32.40 0.49 112 < 1.0 < 1.0 760 4,360 0.0038 26532S/13E-31H10 10/20/2009 362 92 40 2.9 19 45.1 77 110 < 0.10 < 0.50 0.07 < 0.10 < 0.10 0.24 0.39 80 3 < 1.0 590 11.4 0.0042 23632S/13E-31H10 8/19/2009 420 160 48 3.4 50 20.4 18 54 < 0.10 1.10 NA < 0.10 0 1.76 0.68 18 < 1.0 < 1.0 690 242.0 0.0043 23532S/13E-31H10 5/16/1983 665 35 40 NA 85 65.0 360 90 < 4 NA NA 0.20 NA 0.01 NA 360 ND ND 950 0.1 NA NAP:\Portland\672ͲNorthernCitiesManagementArea\006Ͳ2019AnnualReport\WaterQuality\NCMA_WQ_SentryWells_thru2019.xlsx4/22/2020 AppendixA:NCMASentryWellsWaterQualityDataWell Date TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l umhos/cm mg/l32S/13E-31H11 10/14/2019 750 48 56 3.7 120 50.0 320 200 ND ND 0.11 0.16 0 0.24 0.15 320 ND ND 1,070 5.7 0.0031 32032S/13E-31H11 7/9/2019 650 61 73 4.0 110 52.0 310 210 ND 0.17 0.16 0.17 0 0.24 0.28 310 ND ND 1,110 5.9 0.0046 21832S/13E-31H11 4/9/2019 700 61 66 3.7 110 48.0 300 240 ND 0.18 0.14 0.20 0 0.19 0.27 300 ND ND 1,140 3.7 0.0044 22632S/13E-31H11 1/8/2019 730 39 45 3.6 120 52.0 340 220 ND 0.14 0.09 0.18 0 0.24 0.13 340 ND ND 1,090 8.2 0.0033 30032S/13E-31H11 10/9/2018 720 37 49 3.8 130 59.0 340 210 ND 0.24 0.09 0.15 0 0.23 0.08 340 ND ND 1,090 8.2 0.0021 48132S/13E-31H11 7/12/2018 720 36 43 3.6 120 54 340 190 ND 0.27 0.08 0.17 0.014 0.25 0.15 340 ND ND 1,110 7.2 0.0042 24032S/13E-31H11 4/10/2018 780 73 81 3.8 110 47 300 210 ND 0.090 0.17 0.18 0.066 0.24 0.40 300 ND ND 1,130 7.3 0.0055 18332S/13E-31H11 1/10/2018 750 39 51 3.7 130 57 340 220 ND 0.17 0.089 0.20 0.021 0.28 0.16 340 ND ND 1,090 5.9 0.0041 24432S/13E-31H11 10/11/2017 720 38 45 3.7 120 56.0 350 200 ND 0.22 0.13 0.18 0 0.22 0.14 350 ND ND 1,080 5.6 0.0037 27132S/13E-31H11 7/11/2017 820 43 53 3.9 130 58.0 320 230 ND 0.11 0.11 0.13 0 0.29 0.19 320 ND ND 1,100 9.7 0.0044 22632S/13E-31H11 4/12/2017 720 45 53 3.8 120 56.0 320 250 ND ND 0.11 0.17 0 0.25 0.18 320 ND ND 1,100 6.3 0.0040 25032S/13E-31H11 1/13/2017 750 44 57 4.0 130 58.0 340 240 ND 0.11 0.11 0.13 0 0.29 0.15 340 ND ND 1,100 7.2 0.0034 29332S/13E-31H11 10/12/2016 780 41 49 3.9 120 57.0 350 220 ND 0.12 0.10 0.16 0 0.28 0.16 350 ND ND 1,100 8.1 0.0039 25632S/13E-31H11 7/20/2016 420 120 64 6.8 4 38.0 60 39 <0.096 0.10 0.12 0.06 0 0.08 0.59 89 29 <4.1 617 9.0 0.0049 20332S/13E-31H11 4/13/2016 410 110 64 604.0 4 40.0 51 56 <0.096 <0.080 0.11 0.06 0 0.05 0.58 92 41 <4.1 628 6.7 0.0053 19032S/13E-31H11 1/13/2016 450 120 70 7.7 5 36.0 49 65 <0.022 <0.080 0.11 0.10 0 0.07 0.76 86 37 <4.1 675 8.6 0.0063 15832S/13E-31H11 10/14/2015 350 110 69 9.2 4 31.0 42 74 <0.05 <1 0.16 <0.10 0 0.04 0.44 75 33 <10 670 5.7 0.0040 25032S/13E-31H11 7/15/2015 380 120 85 11.0 4 35.0 40 85 <0.05 <1 0.19 <0.1 0 0.05 0.41 65 25 <10 690 9.6 0.0034 29332S/13E-31H11 4/16/2015 400 120 66 7.6 5 36.0 54 100 <0.05 <1 0.17 <0.1 0 0.04 0.48 76 22 <10 700 6.6 0.0040 24932S/13E-31H11 1/14/2015 420 125 68 7.0 6 37.0 45 126 <0.05 <1 0.15 <0.1 0 0.04 0.39 65 20 <10 720 3.5 0.0031 32532S/13E-31H11 10/16/2014 370 120 78 13.0 4 29.0 53 77 <0.05 <1 0.17 <0.1 0 0.04 0.35 88 <10 <10 740 4.5 0.0029 34332S/13E-31H11 7/30/2014 450 120 71 4.4 10 43.0 53 130 0.1 <1 0.15 0.12 0 0.08 0.29 73 20 <10 800 8.0 0.0024 41432S/13E-31H11 4/17/2014 370 120 89 14.0 2 17.0 76 39 <0.05 <1 0.16 <0.1 0 0.03 0.43 121 45 <10 720 3.7 0.0036 27932S/13E-31H11 1/16/2014 350 122 89 15.0 2 18.0 68 42 <0.05 <1 0.17 0.10 0 0.03 0.48 125 58 <10 710 2.3 0.0039 25432S/13E-31H11 10/16/2013 360 100 98 20.0 3 15.0 66 36 <0.05 <1 0.19 <0.1 0 0.06 0.38 139 73 <10 710 4.1 0.0038 26332S/13E-31H11 7/11/2013 370 140 70 6.3 4 23.0 82 40 0.4 <1 0.20 0.11 0 0.04 0.44 117 35 <10 730 3.2 0.0031 31832S/13E-31H11 4/11/2013 340 90 81 14.0 3 18.0 78 30 <0.05 <1 0.19 0.12 0 0.05 0.30 155 78 <10 650 3.2 0.0033 30032S/13E-31H11 1/16/2013 360 107 99 7.1 3 24.0 110 36 <0.05 <1 0.25 <0.1 <0.01 0.05 0.40 165 55 <10 720 3.7 0.0037 26832S/13E-31H11 10/30/2012 380 97 100 6.4 5 24.0 130 38 <0.05 <1 0.28 <0.1 0 0.09 0.20 168 38 <10 720 6.1 0.0021 48532S/13E-31H11 7/25/2012 240 49 56 11.0 5 22.0 99 43 <0.05 <1 0.16 0.19 0 0.11 <0.1 132 33 <10 470 6.6 NA NA32S/13E-31H11 4/19/2012 380 100 87 5.5 4 26.0 150 79 <0.1 <1 0.27 0.26 0 0.03 0.68 180 30 <10 750 1.6 0.0068 14732S/13E-31H11 1/12/2012 480 96 110 4.9 6 33.0 154 95 <0.1 <1 0.28 <0.2 0 0.01 0.31 180 26 <10 850 0.2 0.0032 31432S/13E-31H11 11/21/2011 390 90 78 4.6 5 24.0 111 86 <0.05 <1 0.19 0.13 0 0.01 0.28 128 17 <10 720 0.5 0.0031 32132S/13E-31H11 7/25/2011 260 29 23 5.3 9 20.0 84 80 <0.05 <1 <0.1 0.20 0 0.04 <0.1 89 <5 <5 440 2.7 NA NA32S/13E-31H11 4/21/2011 580 118 70 19.0 49 17.0 9 274 <0.05 <1 <0.1 0.29 0 0.09 0.40 11 3 <2.0 950 NA 0.0034 29532S/13E-31H11 1/24/2011 680 110 60 17.0 64 22.0 5 330 <0.05 <1.0 <0.1 0.22 1 0.16 0.31 11 6 <2.0 1,040 10.0 0.0028 35532S/13E-31H11 10/21/2010 770 100 68 12.0 88 31.0 14 380 <0.1 <1.0 <0.1 0.28 NA 0.05 <0.3 14 <10 <10 1,163 2.2 NA NA32S/13E-31H11 7/26/2010 783 130 80 8.6 142 42.0 3 450 < 0.10 < 0.50 < 0.0200 0.26 0 3.97 0.77 3 < 1.0 < 1.0 1,200 593.0 0.0059 16932S/13E-31H11 4/26/2010 1,130 160 70 6.5 208 50.7 8 530 < 0.10 0.56 < 0.02 0.23 1 3.10 0.97 8 < 1.0 < 1.0 1,600 383.0 0.0061 16532S/13E-31H11 1/27/2010 1,740 430 56 5.0 282 43.0 < 1.0 680 < 0.10 < 0.50 0.08 0.14 0 9.41 2.00 < 1.0 < 1.0 < 1.0 2,300 170.0 0.0047 21532S/13E-31H11 10/20/2009 2,250 1,000 20 2.4 487 22.5 5 410 < 0.10 0.98 0.05 0.13 < 0.10 13.10 4.50 5 < 1.0 < 1.0 3,100 236.0 0.0045 22232S/13E-31H11 8/19/2009 322 150 93 16.7 24 12.1 3 4 < 0.10 1.30 NA 0.19 1 0.71 0.74 23 20 < 1.0 640 153.0 0.0049 20332S/13E-31H11 5/16/1983 840 80 90 NA 100 50.0 250 160 < 4 NA ND 0.20 NA 0.14 NA 250 ND ND 1,200 0.1 NA NAP:\Portland\672ͲNorthernCitiesManagementArea\006Ͳ2019AnnualReport\WaterQuality\NCMA_WQ_SentryWells_thru2019.xlsx4/22/2020 AppendixA:NCMASentryWellsWaterQualityDataWell Date TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l umhos/cm mg/l32S/13E-31H12 4/21/2011 410 97 100 7.2 4 21.0 80 134 <0.05 <1 0.23 0.18 0 0.07 0.42 100 20 <2.0 770 NA 0.0043 23132S/13E-31H12 1/24/2011 440 92 90 9.2 3 27.0 90 140 <0.05 <1.0 0.25 0.11 1 0.04 0.35 110 20 <2.0 810 2.2 0.0038 26332S/13E-31H12 10/21/2010 460 90 110 15.0 7 32.0 94 140 <0.1 <1.0 0.20 0.10 NA 0.10 0.38 124 30 <10 868 3.5 0.0042 23732S/13E-31H12 7/26/2010 478 83 109 5.9 53 30.4 122 94 < 0.10 <0.50 0.26 < 0.10 0 0.48 0.56 130 8 < 1.0 730 61.0 0.0067 14832S/13E-31H12 4/26/2010 452 83 83 7.4 29 34.5 72 190 < 0.1 0.56 0.13 < 0.10 1 0.70 0.40 86 14 < 1.0 810 71.0 0.0048 20832S/13E-31H12 1/27/2010 496 71 92 10.6 23 39.1 13 230 <0.10 < 0.50 0.32 < 0.10 0 0.60 0.29 51 38 < 1.0 780 54.4 0.0041 24532S/13E-31H12 10/20/2009 564 71 81 8.6 33 49.8 50 310 <0.10 < 0.50 0.15 < 0.10 < 0.10 0.34 0.32 64 14 < 1.0 850 20.0 0.0045 22232S/13E-31H12 8/19/2009 522 180 148 71.6 95 8.4 30 4 <0.10 1.70 NA 0.24 1 2.36 0.76 170 140 < 1.0 1,000 278.0 0.0042 23732S/13E-31H12 5/16/1983 630 40 40 NA 90 50.0 330 80 < 4 NA NA 0.10 NA 0.02 NA 330 ND ND 900 0.1 NA NAP:\Portland\672ͲNorthernCitiesManagementArea\006Ͳ2019AnnualReport\WaterQuality\NCMA_WQ_SentryWells_thru2019.xlsx4/22/2020 AppendixA:NCMASentryWellsWaterQualityDataWell Date TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l umhos/cm mg/l32S/13E-31H09 10/14/2019 670 43 51 2.7 120 50.0 360 170 ND 0.10 0.07 0.11 0 0.04 0.16 360 ND ND 1,060 0.23 0.0037 26932S/13E-31H09 7/9/2019 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NA NA32S/13E-31H09 4/9/2019 620 43 44 2.5 110 50.0 360 170 ND 0.11 0.08 0.14 0 0.03 0.14 360 ND ND 1,060 0.05 0.0033 30732S/13E-31H09 1/8/2019 690 44 44 2.6 110 52.0 370 170 0.0 0.11 0.08 0.16 0 0.04 0.15 370 ND ND 1,060 0.08 0.0034 29332S/13E-31H09 10/9/2018 690 42 46 2.7 110 54.0 360 170 0.0 0.15 0.07 0.11 0 0.04 0.09 360 ND ND 1,080 0.04 0.0022 44732S/13E-31H09 7/10/2018 630 46 47 2.6 120 53 360 170 ND 0.11 0.073 0.13 0.018 0.032 0.17 360 ND ND 1,100 0.041 0.0037 27132S/13E-31H09 4/10/2018 700 44 45 2.5 110 51 360 170 0.074 0.11 0.068 0.13 0.016 0.035 0.17 360 ND ND 1,060 0.10 0.0039 25932S/13E-31H09 1/10/2018 680 40 46 2.6 120 53 360 160 ND 0.14 0.062 0.16 0.019 0.048 0.14 360 ND ND 1,040 0.38 0.0035 28632S/13E-31H09 10/11/2017 640 40 47 2.6 120 55.0 370 160 0.0 0.12 0.08 0.13 0 0.05 0.13 370 ND ND 1,020 0.34 0.0033 30832S/13E-31H09 7/11/2017 750 40 48 2.8 120 56.0 360 170 ND ND 0.08 0.11 0 0.06 0.15 360 ND ND 1,050 0.42 0.0038 26732S/13E-31H09 4/12/2017 620 42 52 3.1 130 60.0 360 170 0.0 ND 0.08 0.17 0 0.05 0.14 360 ND ND 1,040 0.30 0.0033 30032S/13E-31H091/11/2017640 61 53 3.0 100 48.0 320 150 ND ND 0.07 0.16 0 0.05 0.24 320 ND ND 976 0.400.0039 25432S/13E-31H09 10/12/2016 720 46 49 2.8 120 56.0 370 170 0.0 0.18 0.07 0.12 0 0.04 0.18 370 ND ND 1,070 0.36 0.0039 25632S/13E-31H09 7/20/2016 680 45 50 2.9 120 56.0 370 160 0.2 0.14 0.08 0.15 0 0.05 0.16 370 <8.2 <8.2 1,060 0.33 0.0036 28132S/13E-31H09 4/13/2016 670 43 48 2.9 110 57.0 350 160 <0.096 0.20 0.06 0.14 0 0.06 0.18 350 <8.2 <8.2 1,040 0.46 0.0042 23932S/13E-31H09 1/12/2016 630 48 48 2.8 110 54.0 350 180 0.1 0.14 0.04 0.24 0 0.05 0.36 350 <8.2 <8.2 1,100 0.46 0.0075 13332S/13E-31H09 10/14/2015 680 43 44 3.1 100 50.0 360 160 <0.05 <1 0.09 0.28 0 0.03 <0.10 360 <10 <10 1,060 0.18 NA NA32S/13E-31H09 7/15/2015 680 43 52 2.4 120 56.0 360 170 <0.05 <1 0.08 0.11 0 0.03 <0.1 360 <10 <10 1,070 0.13 NA NA32S/13E-31H09 4/16/2015 680 49 41 2.4 100 47.0 350 170 <0.05 <1 0.07 0.11 <0.01 0.04 <0.1 350 <10 <10 1,030 0.47 NA NA32S/13E-31H09 10/16/2014 670 40 43 2.8 110 50.0 3,500 150 <0.05 <1 0.06 0.10 <0.01 0.03 <0.1 350 <10 <10 1,060 0.06 NA NA32S/13E-31H09 7/30/2014 670 43 43 2.2 110 48.0 360 160 <0.05 <1 <0.1 0.15 <0.01 0.03 <0.1 360 <10 <10 1,070 0.06 NA NA32S/13E-31H09 4/15/2014 680 42 43 3.3 87 43.0 340 170 <0.05 <1 0.09 0.11 <0.01 0.02 <0.1 340 <10 <10 1,070 0.05 NA NA32S/13E-31H09 1/16/2014 680 45 42 2.6 100 46.0 360 171 <0.05 <1 <0.05 0.13 <0.01 0.03 <0.1 360 <10 <10 1,060 0.18 NA NA32S/13E-31H09 10/16/2013 670 40 44 2.6 100 47.0 350 180 0.5 <1 <0.05 0.15 <0.01 0.03 <0.1 350 <10 <10 1,053 0.11 NA NA32S/13E-31H09 7/10/2013 670 44 43 2.8 110 52.0 350 180 <0.05 <1 0.07 0.12 <0.01 0.03 <0.1 350 <10 <10 1,070 0.11 NA NA32S/13E-31H09 4/11/2013 720 43 40 2.7 98 46.0 350 170 <0.05 <1 0.07 0.14 <0.01 0.03 <0.1 350 <10 <10 1,070 0.12 NA NA32S/13E-31H09 1/16/2013 660 43 43 2.7 100 47.0 360 180 <0.05 <1 0.07 0.10 <0.01 0.03 <0.1 360 <10 <10 1,060 0.13 NA NA32S/13E-31H09 10/30/2012 660 40 44 2.9 110 49.0 345 170 <0.05 <1 0.07 0.14 <0.01 0.03 <0.1 345 <10 <10 1,070 0.09 NA NA32S/13E-31H09 7/24/2012 700 47 44 2.8 93 45.0 356 180 <0.05 <1 <0.1 0.17 <0.01 0.03 <0.1 356 <10 <10 1,070 0.66 NA NA32S/13E-31H09 4/25/2012 680 48 44 2.7 95 43.0 350 200 <0.1 <1 <0.1 0.26 <0.01 0.03 <0.2 350 <10 <10 1,070 0.20 NA NA32S/13E-31H09 1/10/2012 690 45 44 2.6 100 44.0 340 160 <0.05 <1 <0.1 0.20 <0.01 0.02 <0.1 340 <10 <10 1,070 0.10 NA NA32S/13E-31H09 11/22/2011 690 41 39 2.7 100 46.0 350 160 <0.1 <1 0.05 <0.2 0 0.03 <0.2 350 <10 <10 1,010 0.03 NA NA32S/13E-31H09 7/25/2011 690 44 39 4.5 86 40.0 340 167 <0.05 <1 <0.1 0.15 <0.01 0.03 <0.1 340 <5 <5 1,070 <0.1 NA NAP:\Portland\672ͲNorthernCitiesManagementArea\006Ͳ2019AnnualReport\WaterQuality\NCMA_WQ_SentryWells_thru2019.xlsx4/22/2020 AppendixA:NCMASentryWellsWaterQualityDataWell Date TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l umhos/cm mg/l32S/13E-31H13 10/14/2019 280 99 93 4.7 3 32.0 180 1 ND ND 0.18 0.06 0 0.05 0.30 210 37 ND 675 0.34 0.0030 33032S/13E-31H13 7/9/2019 500 90 83 4.7 4 36.0 170 1 ND 0.08 0.16 0.06 0 0.08 0.35 200 26 ND 654 2.90 0.0039 25732S/13E-31H13 4/9/2019 460 100 79 4.0 4 34.0 180 8 ND 0.05 0.18 0.08 0 0.07 0.31 210 27 ND 690 2.10 0.0031 32332S/13E-31H13 1/8/2019 400 99 79 4.3 7 42.0 180 19 ND 0.06 0.17 0.06 0 0.13 0.29 200 19 ND 703 2.20 0.0029 34132S/13E-31H13 10/9/2018 400 84 79 4.2 5 43.0 190 13 ND 0.05 0.16 0.04 0 0.08 0.18 220 23 ND 678 2.10 0.0021 46732S/13E-31H13 7/12/2018 470 81 72 3.9 3.9 38 190 13 ND 0.096 0.14 0.041 0.045 0.064 0.31 220 25 ND 699 0.86 0.0038 26132S/13E-31H13 4/10/2018 490 82 78 3.8 4.5 44 190 20 ND ND 0.14 0.039 0.041 0.083 0.30 220 30 ND 676 4.2 0.0037 27332S/13E-31H13 1/10/2018 430 75 75 3.8 4.3 38 190 7.2 ND ND 0.14 0.050 0.046 0.07 0.25 210 26 ND 626 2.50 0.0033 30032S/13E-31H13 10/11/2017 390 77 70 3.7 5 38.0 190 15 ND 0.11 0.16 0.03 0 0.08 0.28 220 29 ND 648 1.10 0.0036 27532S/13E-31H13 7/11/2017 390 76 80 3.9 8 45.0 190 30 ND ND 0.15 0.03 0 0.13 0.28 210 19 ND 680 2.20 0.0037 27132S/13E-31H13 4/12/2017 430 79 87 4.4 4 44.0 180 21 ND 0.13 0.17 0.02 0 0.77 0.28 220 40 ND 667 4.50 0.0035 28232S/13E-31H13 1/13/2017 480 81 95 4.7 4 41.0 190 14 ND ND 0.19 0.04 0 0.07 0.31 220 33 ND 652 3.30 0.0038 26132S/13E-31H13 10/12/2016 410 80 87 4.3 4 43.0 190 22 ND ND 0.18 0.04 0 0.07 0.29 220 33 ND 678 2.30 0.0036 27632S/13E-31H13 7/20/2016 510 91 99 5.1 2 34.0 170 19 <0.096 <0.080 0.22 0.04 0 0.04 0.43 210 44 <4.1 694 1.20 0.0047 21232S/13E-31H13 4/13/2016 450 94 99 4.6 3 33.0 150 25 <0.096 <0.080 0.22 0.05 0 0.04 0.44 200 51 <4.1 701 1.20 0.0047 21432S/13E-31H13 1/13/2016 460 99 97 4.8 3 32.0 150 30 <0.022 <0.080 0.19 0.08 <0.010 0.04 0.53 190 43 <4.1 717 0.33 0.0054 18732S/13E-31H13 10/14/2015 370 85 91 4.8 3 32.0 159 45 <0.05 <1 0.23 <0.10 0 0.04 0.26 189 30 <10 710 0.30 0.0031 32732S/13E-31H13 7/15/2015 390 90 99 4.4 3 34.0 145 55 <0.05 <1 0.21 <0.1 0 0.03 0.24 185 40 <10 730 0.24 0.0027 37532S/13E-31H13 4/16/2015 360 89 86 4.8 3 31.0 137 58 <0.05 <1 0.20 <0.1 0 0.03 0.27 172 35 <10 680 0.42 0.0030 33532S/13E-31H13 1/14/2015 390 90 84 4.8 2 31.0 140 61 <0.05 <1 0.18 <0.1 0 0.04 0.24 170 30 <10 670 0.47 0.0026 38332S/13E-31H13 10/16/2014 370 80 84 5.0 3 32.0 146 59 <0.05 <1 0.19 <0.1 0 0.04 0.18 170 24 <10 720 0.61 0.0023 44432S/13E-31H13 7/30/2014 380 86 81 4.2 4 35.0 158 61 <0.05 <1 0.16 <0.1 0 0.05 0.17 175 17 <10 730 0.25 0.0020 50632S/13E-31H13 4/17/2014 380 84 86 5.2 3 26.0 120 87 <0.05 <1 0.18 <0.1 0 0.03 0.30 143 23 <10 730 0.45 0.0036 28032S/13E-31H13 1/16/2014 390 89 91 5.0 4 34.0 119 103 <0.05 <1 0.20 <0.1 0 0.04 0.34 136 17 <10 740 0.30 0.0038 26232S/13E-31H13 10/16/2013 410 84 87 4.7 5 33.0 114 130 <0.05 <1 0.17 <0.1 0 0.05 0.30 124 10 <10 760 0.28 0.0036 28032S/13E-31H13 7/11/2013 420 80 70 4.8 5 35.0 116 120 <0.05 <1 0.19 <0.1 0 0.05 0.21 136 20 <10 760 0.19 0.0026 38132S/13E-31H13 4/11/2013 450 77 77 4.7 6 38.0 113 150 <0.05 <1 0.19 <0.1 0 0.07 0.20 128 15 <10 780 0.15 0.0026 38532S/13E-31H13 1/15/2013 420 74 78 4.7 7 40.0 110 180 <0.05 <1 0.18 <0.1 <0.01 0.09 <0.1 125 15 <10 810 0.55 NA NA32S/13E-31H13 10/30/2012 380 88 99 5.7 3 30.0 160 63 <0.05 <1 0.25 <0.1 0 0.04 0.30 168 8 <10 740 0.33 0.0034 29332S/13E-31H13 7/25/2012 390 108 107 5.5 3 29.0 13 66 <0.05 <1 0.28 <0.1 0 0.00 0.23 168 155 <10 750 0.84 0.0021 47032S/13E-31H13 4/19/2012 390 110 83 4.3 3 26.0 400 68 <0.1 <1 0.22 0.23 0 0.03 0.39 420 20 <10 790 0.24 0.0035 28232S/13E-31H13 1/12/2012 410 94 95 4.5 3 28.0 300 68 <0.1 <1 0.24 <0.2 0 0.03 0.31 320 20 <10 760 0.89 0.0033 30332S/13E-31H13 11/21/2011 410 94 83 4.6 3 30.0 152 72 <0.05 <1 0.21 <0.1 0 0.04 0.30 160 8 <10 730 0.65 0.0032 31332S/13E-31H13 7/25/2011 420 90 84 7.1 4 31.0 148 92 <0.05 <1 0.20 <0.1 0 0.05 0.30 150 3 <5 760 1.90 0.0033 30232S/13E-31H13 4/21/2011 380 88 110 6.3 4 27.0 140 101 <0.05 <1 0.41 0.14 0 0.13 0.33 140 <2.0 <2.0 750 N/A 0.0038 26732S/13E-31H13 1/24/2011 430 83 73 6.0 6 31.0 160 100 <0.05 <1.0 0.22 0.11 1 0.08 0.28 160 <2.0 <2.0 780 0.49 0.0034 29632S/13E-31H13 10/21/2010 410 87 100 3.9 6 33.0 148 100 <0.1 <1.0 0.14 <0.1 NA 0.09 <0.3 148 <10 <10 796 0.66 NA NA32S/13E-31H13 7/26/2010 446 94 93 8.8 10 32.0 38 120 < 0.10 < 0.50 0.14 < 0.10 0 0.20 0.48 56 18 < 1.0 700 22.40 0.0051 19632S/13E-31H13 4/26/2010 416 96 88 9.9 15 37.1 46 150 < 0.1 0.63 0.13 < 0.10 0 0.58 0.44 58 12 < 1.0 780 56.20 0.0046 21832S/13E-31H13 1/27/2010 498 89 80 10.2 16 38.0 31 180 < 0.10 0.56 0.13 < 0.10 0 0.28 0.38 51 20 < 1.0 810 23.60 0.0043 23432S/13E-31H13 10/20/2009 446 100 97 12.8 16 37.9 27 180 < 0.10 0.56 0.17 0.15 < 0.10 0.18 0.42 43 16 < 1.0 760 18.90 0.0042 23832S/13E-31H13 8/19/2009 426 160 101 18.9 93 29.1 64 36 < 0.10 0.98 NA 0.16 0 5.49 0.60 84 20 < 1.0 790 682.00 0.0038 26732S/13E-31H13 5/16/1983 770 60 70 NA 90 70.0 330 120 9.0 NA NA 0.10 NA 0.02 NA 330 ND ND 1,100 0.24 NA NAP:\Portland\672ͲNorthernCitiesManagementArea\006Ͳ2019AnnualReport\WaterQuality\NCMA_WQ_SentryWells_thru2019.xlsx4/22/2020 AppendixA:NCMASentryWellsWaterQualityDataWell Date TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l umhos/cm mg/l12N/36W-36L01 10/15/2019 880 38 73 3.6 140 45.0 180 440 0.5 0.09 0.18 0.04 ND ND 0.12 180 ND ND 1,190 0.078 0.0032 NA12N/36W-36L01 7/10/2019 700 37 70 3.6 140 51.0 180 430 0.4 0.15 0.17 0.05 ND ND ND 180 ND ND 1,180 ND NA NA12N/36W-36L01 4/10/2019 870 39 64 3.5 130 48.0 180 440 0.5 1.50 0.16 0.06 ND ND 0.14 180 ND ND 1,190 0.078 0.0036 NA12N/36W-36L01 1/9/2019 840 39 70 3.4 140 46.0 180 420 0.5 0.23 0.17 0.06 ND ND 0.09 180 ND ND 1,200 ND 0.0023 NA12N/36W-36L01 10/10/2018 850 38 67 3.5 140 49.0 180 430 0.4 0.16 0.16 0.03 ND ND ND 180 ND ND 1,190 0.190 NA NA12N/36W-36L01 7/10/2018 960 39 64 3.4 130 47 180 430 0.50 0.11 0.17 0.12 ND ND 0.063 180 ND ND 1,230 ND 0.0016 61912N/36W-36L01 4/11/2018 900 39 70 3.5 140 49 180 430 0.48 0.11 0.16 0.052 ND ND 0.10 180 ND ND 1,190 ND 0.0026 39012N/36W-36L01 1/11/2018 940 38 76 3.5 140 50 180 440 0.37 0.19 0.17 0.073 ND ND 0.097 180 ND ND 1,180 ND 0.0026 39212N/36W-36L01 10/11/2017 880 35 65 3.7 140 50.0 190 430 0.4 0.14 0.19 0.05 ND 0.05 ND 190 ND ND 1,210 0.230 NA NA12N/36W-36L01 7/12/2017 1,000 37 73 3.9 150 55.0 180 420 0.4 0.15 0.17 0.03 ND 0.00 ND 180 ND ND 1,180 0.230 NA NA12N/36W-36L01 4/12/2017 860 37 73 4.0 130 49.0 180 420 0.5 0.14 0.17 0.02 ND 0.01 0.06 180 ND ND 1,170 0.430 0.0017 59712N/36W-36L01 1/12/2017 870 38 76 3.8 150 55.0 190 430 0.5 0.12 0.21 0.04 ND ND 0.07 190 ND ND 1,180 0.110 0.0018 54312N/36W-36L01 10/12/2016 890 35 72 3.8 140 56.0 190 430 0.4 0.11 0.17 0.04 ND ND 0.12 190 ND ND 1,220 0.037 0.0034 29212N/36W-36L01 7/19/2016 920 37 69 3.6 130 50.0 180 430 1.9 0.25 0.15 0.04 <0.010 <0.0040 0.10 180 <8.2 <8.2 1,200 <0.030 0.0027 37012N/36W-36L01 4/12/2016 860 38 65 3.5 130 49.0 180 390 2.0 <0.080 0.16 0.04 <0.010 <0.0040 0.12 180 <8.2 <8.2 1,210 <0.05 0.0032 31712N/36W-36L01 1/14/2016 890 36 64 3.4 130 49.0 180 410 0.5 <0.080 0.15 0.06 <0.010 <0.0040 0.10 180 <8.2 <8.2 1,210 0.070 0.0028 36012N/36W-36L01 10/15/2015 920 37 63 4.2 120 47.0 180 400 0.7 <1 0.15 <0.20 <0.01 <0.005 <0.20 180 <10 <10 1,210 <0.05 NA NA12N/36W-36L01 7/16/2015 930 39 74 2.8 140 50.0 180 410 1.2 <1 0.15 <0.1 <0.01 <0.005 <0.1 180 <10 <10 1,210 <0.05 NA NA12N/36W-36L01 4/14/2015 890 38 55 3.1 110 44.0 180 440 0.8 1.00 0.16 <0.2 <0.01 <0.005 <0.2 180 <10 <10 1,160 <0.05 NA NA12N/36W-36L01 1/13/2015 880 39 59 3.0 120 45.0 180 440 0.6 <1 0.14 <0.1 <0.01 <0.005 <0.1 180 <10 <10 1,160 <0.05 NA NA12N/36W-36L01 10/15/2014 910 34 58 3.7 120 43.0 180 380 1.0 <1 0.14 <0.2 <0.01 <0.005 <0.2 180 <10 <10 1,210 <0.05 NA NA12N/36W-36L01 7/30/2014 890 36 61 3.2 120 47.0 180 390 0.6 <1 0.12 <0.2 <0.01 <0.005 <0.2 180 <10 <10 1,220 <0.05 NA NA12N/36W-36L01 4/16/2014 910 36 46 2.6 76 27.0 180 440 0.8 <1 0.15 <0.1 <0.01 <0.005 <0.1 180 <10 <10 1,200 <0.05 NA NA12N/36W-36L01 1/16/2014 910 35 60 3.1 110 42.0 180 416 1.0 1.10 0.14 <0.2 <0.01 <0.005 <0.2 180 <10 <10 1,190 <0.05 NA NA12N/36W-36L01 10/16/2013 910 40 63 4.5 120 43.0 170 460 0.8 <1 0.13 <0.2 <0.01 <0.005 <0.2 170 <10 <10 1,210 <0.05 NA NA12N/36W-36L01 7/10/2013 910 39 54 3.2 120 42.0 175 430 0.8 <1 0.14 <0.1 <0.01 <0.005 <0.1 175 <10 <10 1,210 0.180 NA NA12N/36W-36L01 4/11/2013 890 38 59 3.6 110 43.0 180 420 0.8 <1 0.16 <0.2 <0.01 <0.005 <0.2 180 <10 <10 1,200 <0.05 NA NA12N/36W-36L01 1/15/2013 870 39 61 3.4 110 41.0 178 440 0.6 <1 0.15 <0.2 <0.01 <0.005 <0.2 178 <10 <10 1,190 0.130 NA NA12N/36W-36L01 10/31/2012 910 35 66 4.0 130 46.0 165 400 1.6 <1 0.16 0.20 <0.01 <0.005 <0.5 165 <10 <10 1,200 <0.05 NA NA12N/36W-36L01 7/24/2012 880 43 65 3.9 110 41.0 168 420 <0.05 <1 0.16 <0.1 <0.01 0.02 <0.1 168 <10 <10 1,190 0.190 NA NA12N/36W-36L01 4/18/2012 880 47 52 3.2 95 36.0 180 450 0.4 <1 0.12 <0.2 <0.01 <0.005 <0.2 180 <10 <10 1,190 <0.1 NA NA12N/36W-36L01 1/11/2012 790 41 64 4.1 120 44.0 170 380 1.3 <1 0.19 0.18 <0.02 <0.005 <0.2 170 <10 <10 1,190 <0.1 NA NA12N/36W-36L01 11/21/2011 910 39 55 3.5 110 40.0 180 380 0.4 <1 0.16 <0.2 <0.01 <0.005 <0.2 180 <10 <10 1,200 <0.1 NA NA12N/36W-36L01 7/25/2011 890 41 65 5.7 110 43.0 170 409 0.4 <1 0.15 <0.1 <0.01 <0.005 <0.1 170 <5 <5 1,200 0.024 NA NA12N/36W-36L01 4/21/2011 890 42 61 4.2 100 30.0 170 415 0.6 <1 0.19 0.07 <0.01 <0.005 <0.1 170 <2.0 <2.0 1,200 NA NA NA12N/36W-36L01 1/24/2011 890 41 55 5.1 98 36.0 180 400 0.5 <1.0 0.20 0.15 <0.10 <0.005 <0.1 180 <2.0 <2.0 1,200 <0.1 NA NA12N/36W-36L01 10/21/2010 910 38 76 3.6 130 47.0 169 400 0.4 <1.0 0.10 <0.1 NA <0.005 <0.3 169 <10 <10 1,213 <0.1 NA NA12N/36W-36L01 7/27/2010 707 36 64 3.7 127 47.4 182 420 0.4 < 0.50 0.16 < 0.10 < 0.10 < 0.00500 0.11 182 < 1.0 < 1.0 1,100 < 0.100 0.0031 32712N/36W-36L01 4/26/2010 860 42 70 4.1 129 48.9 191 400 0.5 0.77 0.22 < 0.1 0 0.06 0.14 191 < 1.0 < 1.0 1,100 4.530 0.0033 30012N/36W-36L01 10/21/2009 856 38 72 4.6 131 48.2 192 420 0.5 0.84 0.15 0.12 < 0.10 0.10 0.13 192 < 1.0 < 1.0 1,100 1.680 0.0034 29212N/36W-36L01 8/20/2009 890 39 78 4.2 138 48.1 184 390 0.5 0.56 NA < 0.10 < 0.10 0.19 0.14 184 < 1.0 < 1.0 1,200 2.030 0.0036 27912N/36W-36L01 5/11/2009 832 63 84 4.9 111 45.4 204 330 NA NA NA 0.12 NA 0.55 0.22 204 < 1.0 < 1.0 1,200 4.020 0.0035 28612N/36W-36L01 3/26/1996 882 35 66 4.8 124 47.0 233 408 2.0 NA 0.24 NA NA NA NA NA NA NA NA NA NA NA12N/36W-36L01 6/8/1976 936 38 72 3.5 130 48.0 223 423 0.6 NA 0.15 0.70 NA NA NA NA NA NA NA NA NA NAP:\Portland\672ͲNorthernCitiesManagementArea\006Ͳ2019AnnualReport\WaterQuality\NCMA_WQ_SentryWells_thru2019.xlsx4/22/2020 AppendixA:NCMASentryWellsWaterQualityDataWell Date TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l umhos/cm mg/l12N/36W-36L02 10/15/2019 780 99 120 6.3 100 41.0 270 240 ND 2.00 0.35 0.08 0 0.17 0.66 270 ND ND 1,210 0.490 0.0067 15012N/36W-36L02 7/10/2019 660 99 100 5.9 94 44.0 260 240 ND 1.90 0.33 0.10 0 0.15 0.60 260 ND ND 1,200 0.140 0.0061 16512N/36W-36L02 4/10/2019 820 100 100 5.7 96 43.0 270 240 ND 2.00 0.32 0.09 0 0.15 0.53 270 ND ND 1,220 0.170 0.0053 18912N/36W-36L02 1/9/2019 820 100 110 6.1 99 42.0 270 240 ND 2.20 0.33 0.10 0 0.15 0.50 270 ND ND 1,220 0.420 0.0050 20012N/36W-36L02 10/10/2018 840 99 110 7.2 100 46.0 260 240 ND 2.20 0.33 0.06 0 0.19 0.40 260 ND ND 1,200 5.200 0.0040 24812N/36W-36L02 7/10/2018 800 100 99 5.6 89 41 260 240 ND 2.0 0.33 0.14 0.14 0.14 0.62 260 ND ND 1,260 0.9 0.0062 16112N/36W-36L02 4/11/2018 850 100 110 6.0 96 42 260 230 0.044 1.8 0.32 0.097 0.16 0.17 0.66 260 ND ND 1,210 2.1 0.0066 15212N/36W-36L02 1/11/2018 800 100 110 6.3 97 44 260 230 ND 2.0 0.38 0.12 0.17 0.17 0.65 260 ND ND 1,190 0.510 0.0065 15412N/36W-36L02 10/11/2017 830 100 100 5.9 97 44.0 280 230 ND 1.80 0.36 0.09 0 0.16 0.66 280 ND ND 1,220 0.410 0.0066 15212N/36W-36L02 7/12/2017 940 97 100 6.1 98 45.0 250 230 ND 2.20 0.32 0.10 0 0.16 0.59 250 ND ND 1,200 0.750 0.0061 16412N/36W-36L02 4/12/2017 780 97 120 6.7 98 43.0 250 240 ND 2.20 0.35 0.08 0 0.16 0.51 250 ND ND 1,190 0.770 0.0053 19012N/36W-36L02 1/12/2017 810 94 120 6.6 110 48.0 270 240 ND 2.00 0.36 0.08 0 0.19 0.53 270 ND ND 1,200 1.100 0.0056 17712N/36W-36L02 10/12/2016 820 99 120 6.6 110 50.0 270 240 ND 2.00 0.35 0.08 0 0.17 0.58 270 ND ND 1,230 0.100 0.0059 17112N/36W-36L02 7/19/2016 820 97 110 6.2 95 45.0 270 240 <0.096 2.00 0.33 0.08 0 0.15 0.65 270 <8.2 <0.82 1,220 0.140 0.0067 14912N/36W-36L02 4/12/2016 800 96 100 6.0 94 44.0 270 230 <0.096 1.80 0.32 0.12 0 0.14 0.81 270 <8.2 <0.82 1,240 0.370 0.0084 11912N/36W-36L02 1/14/2016 860 96 110 6.4 99 47.0 260 230 <0.018 1.60 0.34 0.10 0 0.17 0.65 260 <8.2 <8.2 1,240 1.900 0.0068 14812N/36W-36L02 10/15/2015 800 89 96 6.0 91 0.2 266 230 <0.05 2.20 0.32 0.22 0 0.15 0.37 266 <10 <10 1,220 0.320 0.0042 24112N/36W-36L02 7/16/2015 840 97 120 5.9 110 46.0 260 240 <0.05 2.44 0.34 0.11 0 0.15 0.59 260 <10 <10 1,230 0.160 0.0061 16412N/36W-36L02 4/14/2015 800 98 88 5.3 83 39.0 270 240 <0.05 2.90 0.33 0.10 0 0.13 0.38 270 <10 <10 1,180 0.400 0.0039 25812N/36W-36L02 1/13/2015 820 100 91 5.5 86 39.0 250 250 <0.05 2.20 0.31 0.11 0 0.13 0.32 250 <10 <10 1,190 0.077 0.0032 31112N/36W-36L02 10/15/2014 800 88 96 6.4 91 40.0 260 210 <0.05 2.10 0.32 <0.1 0 0.14 0.36 260 <10 <10 1,230 0.120 0.0041 24612N/36W-36L02 7/30/2014 800 98 99 5.8 88 39.0 280 210 <0.05 2.40 0.28 0.11 0 0.14 0.19 280 <10 <10 1,240 0.270 0.0019 51612N/36W-36L02 4/16/2014 820 95 89 6.3 73 31.0 280 210 <0.05 2.30 0.31 <0.1 0 0.13 0.35 280 <10 <10 1,240 0.220 0.0037 27112N/36W-36L02 1/16/2014 800 100 87 5.0 76 33.0 270 230 <0.05 2.30 0.31 0.23 0 0.14 0.44 270 <10 <10 1,230 0.410 0.0044 22712N/36W-36L02 10/16/2013 810 90 110 6.4 91 40.0 260 240 <0.05 2.20 0.32 <0.1 0 0.15 0.32 260 <10 <10 1,220 0.540 0.0036 28112N/36W-36L02 7/10/2013 790 105 94 5.8 88 38.0 260 240 <0.05 2.50 0.34 <0.1 0 0.13 0.11 260 <10 <10 1,240 0.310 0.0010 95512N/36W-36L02 4/11/2013 830 100 99 6.2 83 37.0 260 220 <0.05 2.20 0.35 <0.1 0 0.14 0.45 260 <10 <10 1,240 0.600 0.0045 22212N/36W-36L02 1/15/2013 770 110 110 6.7 84 38.0 265 220 <0.05 2.80 0.36 <0.1 0 0.14 0.20 265 <10 <10 1,240 0.610 0.0018 55012N/36W-36L02 10/31/2012 800 100 120 7.3 90 39.0 265 200 <0.1 2.40 0.40 0.34 0 0.14 0.34 265 <10 <10 1,250 0.300 0.0034 29412N/36W-36L02 7/24/2012 800 134 125 7.4 83 35.0 277 200 <0.05 2.30 0.42 0.13 0 0.14 0.31 277 <10 <10 1,250 0.520 0.0023 43212N/36W-36L02 4/18/2012 770 130 95 6.2 75 33.0 270 210 0.4 4.00 0.35 0.36 0 0.13 <0.2 270 <10 <10 1,250 0.770 NA NA12N/36W-36L02 1/11/2012 900 122 110 7.2 95 37.0 290 170 <0.1 4.80 0.48 0.28 <0.02 0.17 0.45 290 <10 <10 1,250 1.800 0.0037 27112N/36W-36L02 11/21/2011 780 130 95 6.1 77 33.0 270 160 <0.1 <1 0.40 <0.2 <0.01 0.13 0.45 270 <10 <10 1,240 0.400 0.0035 28912N/36W-36L02 7/25/2011 790 129 110 9.1 74 33.0 280 177 <0.05 2.30 0.36 0.12 0 0.13 0.51 280 <5 <5 1,280 2.300 0.0040 25212N/36W-36L02 4/21/2011 770 120 90 5.3 86 26.0 280 206 <0.05 2.30 0.24 0.26 0 0.00 0.57 280 <2.0 <2.0 1,270 NA 0.0048 21112N/36W-36L02 1/24/2011 800 120 95 7.6 75 30.0 300 190 <0.05 2.30 0.39 0.16 1 0.13 0.53 300 <2.0 <2.0 1,270 1.400 0.0044 22612N/36W-36L02 10/21/2010 770 120 130 7.6 89 44.0 275 160 <0.1 3.40 0.48 <0.1 NA 0.15 0.54 275 <10 <10 1,293 0.120 0.0045 22212N/36W-36L02 7/27/2010 737 110 121 7.8 91 38.9 268 190 < 0.10 < 0.50 0.43 0.10 1 0.18 0.80 268 < 1.0 < 1.0 1,200 0.845 0.0073 13812N/36W-36L02 4/26/2010 720 100 116 6.9 85 32.4 215 210 1.5 0.77 0.38 0.20 0 0.17 0.70 215 < 1.0 < 1.0 1,100 3.870 0.0070 14312N/36W-36L02 10/21/2009 638 99 113 6.2 82 23.0 172 200 < 0.10 3.20 0.27 0.33 57 0.13 0.61 172 < 1.0 < 1.0 940 0.255 0.0062 16212N/36W-36L02 8/20/2009 785 100 131 6.7 90 36.6 290 190 < 0.10 3.80 NA 0.15 0 0.31 0.75 290 < 1.0 < 1.0 1,200 0.830 0.0075 13312N/36W-36L02 5/11/2009 775 120 132 7.2 84 39.7 294 180 NA NA NA 0.18 NA 0.43 0.78 294 < 1.0 < 1.0 1,300 0.958 0.0065 15412N/36W-36L02 3/26/1996 772 127 130 8.7 86 36.0 390 148 0.2 NA 0.50 NA NA NA NA NA NA NA NA NA NA NA12N/36W-36L02 6/8/1976 820 126 118 6.6 94 44.0 393 184 0.0 NA NA 0.50 NA NA NA NA NA NA NA NA NA NAP:\Portland\672ͲNorthernCitiesManagementArea\006Ͳ2019AnnualReport\WaterQuality\NCMA_WQ_SentryWells_thru2019.xlsx4/22/2020 AppendixA:NCMASentryWellsWaterQualityDataWell Date TDS Chloride Sodium Potassium Calcium MagnesiumBicarbonate as CaCO3SulfateNitrate(as N)Total Kjeldahl NitrogenBoron Fluoride Iodide Manganese BromideTotal Alkalinity as CaCO3Carbonate as CaCO3Hydroxide as CaCO3Specific ConductivityIronBromide / Chloride RatioChloride / Bromide Ratiomg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/l umhos/cm mg/l12N/35W-32C03 10/14/2019 190 60 63 2.6 12 5.6 48 25 8.5 ND 0.10 0.04 ND ND 0.18 48 ND ND 422 0.130 0.0030 33312N/35W-32C03 7/9/2019 320 60 64 2.5 13 6.2 51 25 8.3 ND 0.10 0.05 ND ND 0.15 51 ND ND 426 ND 0.0025 40012N/35W-32C03 4/9/2019 320 64 60 2.7 14 6.2 54 28 8.4 0.09 0.10 0.06 ND 0.01 0.16 54 ND ND 446 0.350 0.0025 40012N/35W-32C03 1/9/2019 290 64 70 2.8 14 6.2 53 29 8.6 0.19 0.12 0.05 ND ND 0.18 53 ND ND 440 0.038 0.0028 35612N/35W-32C03 10/9/2018 280 62 64 2.8 14 6.2 50 28 8.4 0.07 0.09 0.03 ND ND 0.13 50 ND ND 446 0.087 0.0021 47712N/35W-32C03 7/10/2018 300 64 60 2.5 13 5.8 54 27 8.5 ND 0.089 0.11 ND ND 0.18 54 ND ND 458 0.047 0.0028 35612N/35W-32C03 4/10/2018 320 66 62 2.6 13 6.1 51 30 8.4 ND 0.087 0.047 ND ND 0.23 51 ND ND 450 0.26 0.0035 28712N/35W-32C03 1/10/2018 320 62 67 2.7 14 6.4 50 27 8.2 0.11 0.09 0.073 ND ND 0.20 50 ND ND 438 0.210 0.0032 31012N/35W-32C03 10/11/2017 320 64 63 2.8 14 6.5 53 28 8.4 0.11 0.11 0.04 ND 0.01 0.17 53 ND ND 445 0.600 0.0027 37612N/35W-32C03 7/11/2017 370 63 71 2.9 16 7.0 55 28 7.9 ND 0.09 0.04 ND 0.01 0.21 55 ND ND 450 0.300 0.0033 30012N/35W-32C03 4/11/2017 300 65 66 2.8 14 6.6 52 28 8.0 ND 0.08 0.04 ND ND 0.19 52 ND ND 442 0.077 0.0029 34212N/35W-32C03 1/13/2017 300 67 72 3.0 16 7.1 53 29 8.2 ND 0.09 0.03 ND ND 0.21 53 ND ND 449 0.072 0.0031 31912N/35W-32C03 10/13/2016 310 64 68 2.9 14 6.5 53 25 8.1 0.12 0.09 0.08 ND ND 0.18 53 ND ND 433 ND 0.0028 35612N/35W-32C03 7/20/2016 300 66 65 2.8 13 6.4 57 26 35.0 <0.08 0.09 0.03 <0.010 <0.0040 0.16 57 <4.1 <4.1 450 0.039 0.0024 41312N/35W-32C03 4/13/2016 290 65 66 2.8 14 6.5 51 26 36.0 0.09 0.08 0.04 <0.010 <0.0040 0.22 51 <4.1 <4.1 438 0.080 0.0034 29512N/35W-32C03 1/14/2016 290 69 68 2.9 14 6.3 50 27 8.6 <0.08 0.09 0.08 <0.010 <0.0040 0.16 50 <4.1 <4.1 430 0.079 0.0023 43112N/35W-32C03 10/14/2015 280 61 57 2.6 12 5.8 51 28 8.4 <1 0.09 <0.10 <0.01 <0.005 <0.10 51 <10 <10 430 0.330 NA NA12N/35W-32C03 7/14/2015 280 64 67 2.7 14 6.2 50 30 8.0 <1 0.10 <0.1 <0.01 <0.005 <0.1 50 <10 <10 440 0.220 NA NA12N/35W-32C03 4/15/2015 280 62 52 2.4 12 5.4 51 30 7.8 <1 0.08 <0.1 <0.01 <0.005 0.11 51 <10 <10 420 0.110 0.0018 56412N/35W-32C03 1/14/2015 290 63 56 2.3 13 5.8 51 30 8.2 <1 0.08 <0.1 <0.01 <0.005 0.10 51 <10 <10 420 0.380 0.0016 63012N/35W-32C03 10/16/2014 270 55 54 2.7 13 5.7 51 26 7.3 0.30 0.07 <0.1 <0.01 0.01 <0.1 51 <10 <10 430 0.350 NA NA12N/35W-32C03 7/30/2014 280 60 58 1.9 14 6.5 60 29 7.3 <1 <0.1 <0.1 <0.01 <0.005 <0.1 60 17 <10 450 0.160 NA NA12N/35W-32C03 4/15/2014 270 57 55 2.2 12 5.0 54 29 7.1 <1 0.10 <0.1 <0.01 <0.005 0.11 54 <10 <10 430 0.210 0.0019 51812N/35W-32C03 1/16/2014 300 62 57 2.8 14 6.3 54 35 8.1 8.20 <0.1 <0.1 <0.01 0.01 0.12 54 <10 <10 450 0.470 0.0019 51712N/35W-32C03 10/16/2013 310 58 62 2.9 15 6.4 54 38 7.5 <1 0.06 <0.1 <0.01 0.01 0.10 54 <10 <10 450 0.210 0.0017 58012N/35W-32C03 7/11/2013 290 60 45 2.4 14 5.9 61 30 7.4 <1 0.07 <0.1 <0.01 0.01 <0.1 61 <10 <10 440 0.170 NA NA12N/35W-32C03 4/12/2013 330 58 55 2.9 16 6.6 60 35 7.5 <1 0.09 <0.1 <0.01 0.02 0.10 60 <10 <10 460 0.490 0.0017 58012N/35W-32C03 1/15/2013 290 62 57 2.8 15 6.3 55 38 8.3 <1 0.09 <0.1 <0.01 0.01 <0.1 55 <10 <10 470 0.230 NA NA12N/35W-32C03 10/30/2012 330 57 60 3.3 19 7.5 60 36 7.8 <1 0.09 <0.1 <0.01 0.03 <0.1 60 <10 <10 470 1.900 NA NA12N/35W-32C03 7/25/2012 330 67 61 3.3 17 6.4 59 35 8.2 <1 <0.1 <0.1 <0.01 0.07 <0.1 59 <10 <10 460 0.490 NA NA12N/35W-32C03 4/19/2012 370 74 52 2.9 30 12.0 120 58 5.0 <1 0.17 0.20 <0.01 0.06 <0.2 120 <10 <10 580 1.300 NA NAP:\Portland\672ͲNorthernCitiesManagementArea\006Ͳ2019AnnualReport\WaterQuality\NCMA_WQ_SentryWells_thru2019.xlsx4/22/2020