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TABLE 4 <br /> Foothill Sanitary Landfill <br /> First Storm Event <br /> (Units mg/1 unless noted) <br /> Sampling Designation S-1 S-2 Concentration <br /> Sampling Date 2/12/10 2/12/10 Limit <br /> Monitoring and Field Parameters <br /> General Water Qualitv Parameters <br /> Temperature -C (field) NM NM NR <br /> Chloride 2 1 160 <br /> Nitrate as Nitrogen ND ND 7.5 <br /> Total Dissolved Solids 100 90 850 <br /> Sulfate ND ND 140 <br /> H (units) 7.12 7.00 4.8-9.6 <br /> Electrical Conductivity 131 94 440 <br /> umhos/cm <br /> Turbidity 26.6 43.2 410 <br /> Metals <br /> Calcium 12 10 NE3 <br /> Magnesium 5 4 NE3 <br /> Potassium 7 4 NE3 <br /> Sodium 6 4 NE3 <br /> Constituents of Concern <br /> Alkalinity, Bicarbonate 70 50 NE3 <br /> Alkalinity, Carbonate ND ND NE3 <br /> Alkalinity, Total 60 40 NE3 <br /> Alkalinit , H droxide ND ND NE3 <br /> Volatile Organic Compounds 82608 u /L <br /> All Compounds ND ND detect <br /> NE= Not Established <br /> ND = Not Detected <br /> NR= Not Required <br /> NM = Not Measured <br /> NA= Not applicable. <br /> *=Trace concentration (estimated value) <br /> [1] Not established due to >50% non-detects <br /> [2] Not established due to statistically significant increasing trend. Concentration limit from WDRs. <br /> 3 Not established due to insufficient data. <br /> Foothill Sanitary Landfill 16 Department of Public Works/Solid Waste <br /> 15`Semester 2010 Groundwater Monitoring County of San Joaquin—July 21,2010 <br />