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Diamond Pet Food Processors of Ripon California LLC January 28,2011 <br /> Combined Annual and Fourth-Quarter 2070 Groundivater Monitoring Report Page 1 of 8 <br /> In correspondence dated August 12, 2006, the CVRWQCB adopted WQPS for the aquifers <br /> underlying the DP site. Table 2 presents WQPS for the site. <br /> Table 2 <br /> Water Quality Protection Standards <br /> COC Se"perched Aquifer Upper Aquifer Intermediate Aquifer <br /> Bicarbonate 307 mg/L 482 m,-/L 315 mg/L <br /> Calcium 51 mg/L 209 mg/L 49 tng/L <br /> Chloride 178 mg/L 197 mg/L 68 mg/L <br /> Specific Conductance 1242µmhos/cm 1580 µmhos/cm 760 µmhos/cm <br /> Magnesium 26 mgt 43 mg/L 8.8 mg/L <br /> Nitrate 4.3 mg/L 4.7 mg/L 5.7 mg/L <br /> H 6.5-8.5 6.5-8.5 6.5-8.5 <br /> Potassium 2.6 mg/L 10 mg/L 6.8 mg/L <br /> Sodium 184 mg/L 89 mg/L 100 mg/L <br /> Sulfate 111 mg/L 150 mg/L 31 mg/L <br /> TDS 713 mg/L 1030 mg/L 470 mg/L <br /> Notes: COC=constituents of concern. TDS=Total dissolved solids. <br /> 2010 Groundwater-Monitoring Summary <br /> Analytical results of constituents of concern (COC) parameters from fourth quarter of 2010 were <br /> evaluated to determine compliance with WQPS, and the percentage of analytes per well meeting <br /> the WQPS were calculated (Table 4 [following text]). Semiperched, upper, and intermediate <br /> aquifer water quality meets 100 percent of WQPS in wells located between the East Percolation <br /> Field and the Stanislaus River in the southeast comer of the site (013-10, OB-16, OB-17, and <br /> TH-5), in the north central portion of the site (M-7-A and M-19-C), and northwest of the site <br /> (TH-7). <br /> PH <br /> All monitoring and production wells meet WQPS for pH. <br /> Specific Conductance <br /> Wells OB-9, OB-10, OB-12, OB-14 through OB-23, OB-26, OB-27, TH-2, TH-4 through TH-7, <br /> TH-9, TH-10, M-7-A, M-19-C, PW-6 and PW-7 meet WQPS for specific conductance (SC). <br /> Total Dissolved Solids <br /> Wells OB-9, OB-10, OB-16 through OB-20, OB-22, OB-23, OB-26, OB-27, TH-2, TH-4, TH-5, <br /> TH-7, TH-9, M-7-A, M-11-C, M-19-C, PW-7, and PW-8 meet WQPS for TDS. <br /> 10107.01 Task 2 Lawrence&Associates <br /> M-ICLIENTSI Diamond Pet Foods1010107..01-Groundwater Monitoringl Groundwater Uonitoring12010t2nd Half 20101annual-2"d Half <br /> 2010 repart.doc <br />