ARCHIVED REPORTS_2013 ANNUAL REPORT

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Nest16 USA, Inc., Ripon, California March 26, 2014 2013 Annual Report 2.1.3 CITY OF RIPON PRODUCTION WELL NETWORK The City of Ripon used 10 municipal supply wells to meet potable and non-potableb water demand in 2013, pumping approximately 1.89 billion gallons of groundwater (Table 2). The majority of these municipal supply wells are screened across multiple aquifers (Table A-1), primarily in the Intermediate and Lower aquifers. The City of Ripon's potable water withdrawal increased by 3.48 percent from 2012 to 2013. Non-potable water production comprised 19.8 percent of the total production in 2013. Total non-potable water withdrawal from wells MW-5, MW-11, and MW-16 in 2013 (312.8 million gallons [MG]) was lower than for 2012 (348 MG). Combined potable and non-potable water withdrawal increased approximately one percent in 2013 over the previous year. The water consumption rate during 2013 averaged approximately 5.19 MG per day. City of Ripon Municipal Well Pumping over Time 2,500 --e—City of Ripon Production 2,000 L E a 1,500 3 y a. a i O N c 1,000 C N 7 O O O 500 E 0 1984 1987 1990 1993 1996 1999 2002 2005 2008 2011 2014 Year ECM monitored and sampled 10 City of Ripon production wells and two City of Ripon monitoring wells per the MRP requirements. Municipal Well MW-12 was not sampled, as it was not operational in 2013 and well MW-9 was not operational during the Fourth Quarter 2013 sampling event. 2.1.4 WELL INSPECTION AND CORRECTIVE ACTIONS ECM inspected the conditions of the casing, box, cap, lock, and sampling tether of each Nestl6 monitoring well during each quarterly water level monitoring event in 2013. Table 3 summarizes the actions taken to correct the findings of the inspections. b Municipal wells MW-5, MW-11, and MW-16 were used for non-potable water needs. 3