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TABLE 1 <br /> FOOTHILL SANITARY LANDFILL <br /> FOURTH QUARTER 2000 GROUNDWATER MONITORING RESULTS <br /> (Units mg/1 unless noted) <br /> Sampling Designation MW-1 MW-2 MW-3 Groundwater <br /> Sampling Date 10/9/00 10/9/00 10/9/00 Concentration <br /> Limits <br /> Quarterlv Monitoring and Field Parameters <br /> Top of Well Casing Elevation 256.25 269.95 318.32 -- <br /> Depth to Groundwater 202.81 221.10 268.50 == <br /> Groundwater Elevation 53.44 48.85 49.82 <br /> Temperature (°C) (field) 19.8 19.7 20.0 NR <br /> �fieF�Vcal Conductivity (uS/cm) 240 203 272 NE(1) <br /> pH (units)(field) 6.61 6.70 7.41 6.58-8.97 <br /> Turbidity(NTU) (field) 0.27 0.58 0.21 312.2 <br /> Total Dissolved Solids 184 163 196 263.6 <br /> Chloride 4.29 7.30 9.96 NE(1) <br /> Sulfate ND 3.48 7.19 NE(1) <br /> Nitrate-Nitrite Nitrogen 3.65 3.06 3.50 NE(1) <br /> Vol4le Organic Compounds <br /> Acetone ND ND ND detect <br /> richloroethene ND ND 0.323* detect <br /> Napthalene ND ND ND detect <br /> 1,1-Dichloroethene ND ND 0.0688* detect <br /> 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 /> ' =trace concentration estimated value <br /> 8 <br />