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TABLE 1 <br /> FOOTHILL SANITARY LANDFILL <br /> SECOND QUARTER 1999 GROUNDWATER MONITORING RESULTS <br /> (Units mg/l unless noted) <br /> Sampling Designation MW-1* MW-2 MW-3 Groundwater <br /> Sampling Date 4-1-99 4-1-99 4-1-99 ConElenn�stion <br /> uarterl Monitorina and Field Parameters <br /> Top of Well Casing Elevation 256.25 269.95 318.32 <br /> Depth to Groundwater 202.89 220.87 267.64 <br /> roundwater Elevation 53.36 49.08 50.68 <br /> Temperature(°C)(field) 20.8 19.4 19.3 NE <br /> Electrical Conductivity(uS/cm)(field) 235 196 268 610 <br /> pH (units)(field) 7.08 7.70 7.77 6.55-9.03 <br /> Turbidity(NTU)(field) 3.25 1.46 1.3 83.28 <br /> Total Dissolved Solids 165 145 179 261.2 <br /> Chloride 8.2 9.2 13 13 <br /> Sulfate 5.9 1.8 5.1 10 <br /> Nitrate-Nitrite as Nitrogen 2.6 3.2 4.1 12 <br /> Volatile Organic Compounds(ug/L) ND ND detect <br /> 1,1-dichloroethene ND <br /> Benzene ND <br /> Trichloroethene ND <br /> Toluene ND <br /> Chlorobenzene ND <br /> m/p-Xylene ND <br /> NR=Not Required <br /> E=Not Established <br /> ND=Not Detected <br /> ' =Upgradient(background)well <br /> 8 <br />