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' TABLE 1 <br /> ' FOOTHILL SANITARY LANDFILL <br /> FIRST QUARTER 2000 GROUNDWATER MONITORING RESULTS <br /> (Units mg/1 unless noted) <br /> Sampling Designation MW-1 MW-2 MW-3 Groundwater <br /> ' Sampling Date 3/8/00 3/8/00 3/8/00 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 203.51 222.44 269.19 -- <br /> Groundwater Elevation 52.74 47.51 49.13 -- <br /> Temperature (°C) (field) 18.2 18.0 17.3 NR <br /> Electrical Conductivity(uS/cm)(field) 237 197 264 NE(1) <br /> pH (units) (field) 7.37 7.15 7.36 6.57-8.93 <br /> Turbidity(NTU) (field) 1.0 1.2 3.3 88.43 <br /> ' Total Dissolved Solids 180 163 202 257.5 <br /> Chloride 6.79 7.02 9.70 NE(1) <br /> Sulfate 7.60 3.68 7.24 NE(1) <br /> ' Nitrate-Nitrite as Nitrogen 2.37 2.75 3.21 NE(1) <br /> Volatile Organic Compounds (ug/L) <br /> Methylene Chloride 0.0448* 2.45 2.43 detect <br /> Trichloroethene ND ND 0.227* 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 />