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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 <br /> Upstream Downstream Concentration <br /> Sampling Date 2/18/11 2/18/11 Limit <br /> Monitoring and Field Parameters <br /> General Water Quality Parameters <br /> Temperature -C field NM NM NR <br /> Chloride 1 2 160 <br /> Nitrate as Nitrogen ND ND 7.5 <br /> Total Dissolved Solids 100 80 850 <br /> Sulfate ND ND 140 <br /> H units 7.3 7.1 4.8-9.6 <br /> Electrical Conductivity 62 61 440 <br /> umhos/cm <br /> Turbidity 60 121 410 <br /> Metals <br /> Calcium 7 6 NE3 <br /> magnesium 3 3 NE3 <br /> Potassium 3 4 NE3 <br /> Sodium 3 3 NE3 <br /> Constituents of Concern <br /> Alkalinity, Bicarbonate 30 30 NE3 <br /> Alkalinity, Carbonate ND ND NE3 <br /> Alkalinity, Total 20 20 NE3 <br /> Alkalinity, Hydroxide 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 /> 1"Semester 2011 Groundwater Monitoring County of San Joaquin—July 31,2011 <br />