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1 TABLE 1 <br /> 1 FOOTHILL SANITARY LANDFILL <br /> SECOND QUARTER 2001 GROUNDWATER MONITORING RESULTS <br /> (Units mg/1 unless noted) <br /> 1 . <br /> Sampling Designation MW-1 MW-2 MW-3 Groundwater <br /> Sampling Date 4/30/01 4/30/01 4/30/01 Concentration <br /> 1 Limits <br /> Quarterly Monitoring and Field Parameters <br /> 1 op of Well Casing Elevation 256.25 269.95 318.32 -- <br /> Depth to Groundwater 203.98 222.81 269.49 -- <br /> Groundwater Elevation 52.27 47.14 48.83 -- <br /> Temperature (°C)(field) 20.0 19.8 19.3 NR <br /> 1 Electrical Conductivity(uS/cm)(field) 710 570 600 NE(1) <br /> pH (units)(field) 6.92 6.54 6.60 6.48-8.99 <br /> Turbidity(NTU) (field) 12.4 10.6 12.1 174.6 <br /> Total Dissolved Solids 219 172 199 252.2 <br /> 1Chloride 6.23 7.05 9.76 NE(1) <br /> Sulfate 6.73 3.01 7.00 NE(1) <br /> Nitrate-Nitrite as Nitrogen 2.31 2.92 3.48 NE(1) <br /> 1Volatile Organic Compounds(ug/L) <br /> Methyl tert-butyl ether 0.0859' ND ND detect <br /> Trichloroethene ND ND 0.435* - detect <br /> 1,1-Dichloroethene ND ND 0.217* detect <br /> Toluene 0.178* ND ND detect <br /> 1 NR=Not Required <br /> NE=Not Established <br /> ' (1)False positive rate greater than 5% <br /> ND=Not Detected <br /> MW-1 =Upgradient(background)well <br /> i <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> 8 <br /> 1 <br />