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Table 2 <br /> First Quarter 2013 Groundwater Monitoring Results — Deep Aquifer <br /> Corral Hollow Sanitary Landfill <br /> (Units mg/1 unless noted) <br /> Monitoring Point MW-6 <br /> Monitoring Date Date Conc. Date Conc. <br /> 1/28/13 Limit 1/28/13 Limit <br /> Monitoring and Field Parameters <br /> Elevations(feet) <br /> TOC Elevation 303.33 NR 256.48 NR <br /> Depth to Groundwater 358.61 NR 303.68 NR <br /> Groundwater Elevation -5528 NR -47.20 NR <br /> General Water Quality Parameters <br /> Temperature('C)(field) 19.00 NR 15.60 NR <br /> pH(units)(field) 7.27 3.4-8.4 7.83 4.9-8.3 <br /> Electrical Conductivily <br /> (uS/cm)(field) 1,569 1,800 1,158 1,800 <br /> Turbidity(NTU)(field) 37.4 68 14.3 57 <br /> Constituents of Concern <br /> Bicarbonate Alkalinity as HCO3 290 360 180 540 <br /> Carbonate Alkalinity as CaCO3 ND 24 ND 5 <br /> Chloride 160 120 98 190 <br /> Nitrate as Nitrogen 4.8 2.9 2.1 6 <br /> Sulfate 370 330 270 440 <br /> Total Dissolved Solids 1000 810 690 1100 <br /> Calcium 97 120 68 110 <br /> Magnesium 41 31 20 50 <br /> Sodium 170 180 130 210 <br /> Potassium 3.5 5.6 3.9 120 <br /> Volatile Organic Compounds*826013)(ugU <br /> All Compounds ND detect ND detect <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 V;DRs. <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 /> 1 5'Quarter 2013 Groundwater Monitoring County of San Joaquin—April 15,2013 <br />