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Table 1 <br /> Third Quarter 2012 Groundwater Monitoring Results - Shallow Aquifer <br /> Corral Hollow Sanitary Landfill <br /> (Units mg/I unless noted) <br /> Monitoring Point _ S13-1 MW-4 MW-5 MW-8 <br /> Monitoring Date Date Cone. Date Cone. Date Cone. Date Cone. <br /> 7/16/12 Limit 7/16/12 Limit 7/16/12 Limit Trend 7/16/12 Limit <br /> Monitoring and Field Parameters <br /> Elevations feet <br /> TOC Elevation j 275.46 NR 246.67 NR 300.93 ` NR NR 305.66 NR <br /> Depth to Groundwater 40.83 NR 19.64 NR 68.58 NR i NR 78.52 NR_ <br /> Groundwater Elevation 234.63 NR 227.03 NR 232.35 NR NR ; 227.14� NR <br /> General Water uali Parameters <br /> Tem erature °C field 23.3 NR 23.8 NR 23.1 NR NR 22.4 NR <br /> pH(units) field 6.88 6.89-7.7 7.03 6.78-8.0 6.93 6.89-8.1 j NS i 7.65 6.89-8.2 <br /> Electrical Conductivity(uS/em) 1309 1,700 1937 1 3,400 1508 ; 2,400 NS 798.6 I 970 <br /> field <br /> Turbidity TU field 21.1 1 200 31.1 490 16.7 0 180 deer 19.3 84 <br /> Constituents of Concern <br /> Bicarbonate Mkalinity as HCO3 670 700 430 510 590 790 NS 290 310 <br /> Carbonate Alkalinity as CaCO3 ND 5 ND 5 ND 780 NS ND 2.5 <br /> Total Alkalinity as CaCO3 550 660 360 400 480 530 NS 240 280 <br /> bride 15 120 110 650 100 280 NS 36 140_ <br /> Mate as Nitrogen 0.038* 42 9.9 59 13 i 45 NS 10 17 <br /> Sulfate 38 67 410 1300 12 660 deer 16 36 <br /> Total Dissolved Solids 680 j 810 1200 1 2000 780 I 1500 incr 400 480 <br /> Volatile Organic Com ounds*826013 u <br /> 1,1-Dichloroethane ND detect i ND detect 0.22* ( detect incr 0.42* detect <br /> Dichlorodifluoromethane ND detect E ND detect 6.7 detect j deer 5.0 detect <br /> Tetrachloroethene CE ND detect ND detect 4.2 detect incr 4.0 detect <br /> Trichloroethene(TCE) ND detect ND ( detect 0.51 detect deer 0.34* detect <br /> Trichlorofluoromethane ND detect ND ; detect 3.9 detect NS i 6.3 detect <br /> Vinyl Chloride ND detect ND detect 0.37* detect deer ND detect <br /> All Other Compounds ND detect ND detect ND detect NS ND I detect <br /> NR=Not Required ND=Not Detected *Trace Concentration(estimated value) <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 /> {}Parameter also detected in one or more quality control blanks <br /> Corral Hollow Sanitary Landfill 18 Department of Public Works/Solid Waste <br /> 3`d Quarter 2012 Groundwater Monitoring County of San Joaquin-October 30,2012 <br />