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Table 2 <br /> Second Quarter 2012 Groundwater Monitoring Results — Deep Aquifer <br /> to Corral Hollow Sanitary Landfill <br /> (Units mg/I unless noted) <br /> Monitoring Point MW-6 MW-7 <br /> Monitoring Date Date Conc. Date Conc. MCLS <br /> 5/21/12 Limit 5/21/12 Limit MG/L <br /> Monitoring and Field Parameters <br /> Elevationsfeet <br /> TOC Elevation 303.33 I NR 256.48 NR NR <br /> Depth to Groundwater 358.56 NR 303.24 NR NR <br /> Groundwater Elevation -55.23 NR -46.76 NR NR <br /> General Water Quality Parameters <br /> Tem erature °C field 19.5 NR 21.0 NR NR <br /> H(units)(field) 7.56 3.4-8.4 7.33 I 4.9-8.3 6.5-8.5 <br /> Electrical Conductivi uS/cm field 1,076 1,800 1,288 1,600 900 <br /> Turbidity TU field 38.6 80 20.1 70 NL <br /> Constituents of Concern <br /> Bicarbonate Alkalinity as HCO3 150 450 j 280 350 ? NL <br /> Carbonate Alkalinity as CaCO3 ND 5 =ND 5 NL <br /> Chloride 97 120 150 190 250 <br /> Nitrate as Nitrogen 1.9 3.3 5.2 f 6.1 10 <br /> Sulfate 280 340 360 I 440 250 <br /> Total Dissolved Solids 740 790 i 1,000 1100 500 <br /> Volatile Organic Com ounds *8260B u <br /> All Compounds ND detect ND detect NR <br /> NR=Not Required ND=Not Detected <br /> NE=Not established,due to>50%non-detects NT=Not Tested <br /> MCL=Maximum Contaminant Levels NL=Not Listed <br /> NS=Not statistically significant deer=significantly decreasing trend <br /> I=Insufficient data for statistical analysis incr=significantly increasing trend <br /> Underlined values indicate a concentration limit exceedance. Bold values indicate a detected organic compound. <br /> [1] Not established due to statistically significant increasing trend. Concentration limit from WDRs. <br /> *Trace Concentration(estimated value) <br /> {}=Parameter also detected in one or more quality control blanks <br /> Corral Hollow Sanitary Landfill 21 Department of Public Works/Solid Waste <br /> 2nd Quarter 2012 Groundwater Monitoring County of San Joaquin—July 30,2012 <br />