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TABLE 1 <br /> ' FOOTHILL SANITARY LANDFILL <br /> FIRST QUARTER 2001 GROUND-WATER MONITORING RESULTS <br /> (Units mg/l unless noted) <br /> Sampling Designation MW-1 MW-2 MW-3 Groundwater <br /> ' Sampling Date 1/15/01 1/15/01 1/15/01 Concentration <br /> Limits <br /> ' Quarteriv Monitoring and Field Parameters <br /> Top of Well Casing Elevation 256.25 269.95 318.32 -- <br /> ' Depth to Groundwater 203.79 222.61 269.36 =_ <br /> roundwater Elevation 52.46 47.34 48.96 <br /> Temperature (°C)(field) 17.8 15.8 23.7 NR <br /> ' Electrical Conductivity(uS/cm)(field) 264 198 316 NE(1) <br /> pH (units)(field) 7.41 7.98 7.01 6.47-9.02 <br /> Turbidity(NTU) (field) 2.51 2.14 2.35 196.4 <br /> ' Total Dissolved Solids 183 171 191 253.3 <br /> Chloride 6.55 7.12 12.0 NE(1) <br /> Sulfate 7.02 3.47 7.66 NE(1) <br /> ' Nitrate-Nitrite as Nitrogen 2.70 2.94 3.64 NE(1) <br /> Volatile Organic Compounds(ug/L) <br /> ' Methylene Chloride ND 0.0989" ND detect <br /> Trichloroethene ND ND 0.717 detect <br /> 1,1-Dichloroethene ND ND 0.316* detect <br /> ' R=Not Required <br /> NE=Not Established <br /> 1)False positive rate greater than 5% <br /> ' 14D=Not Detected <br /> W-1 =Upgradient(background)well <br /> =trace concentration estimated value <br /> 1 <br /> 1 <br /> 8 <br />