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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />GROUNDWATER <br />FOOTHILL SANITARY LANDFILL <br />Units mg/1 unless noted <br />Sample Designation <br />Sampling Date <br />MW -5 <br />7/23/07 <br />MW -5 <br />4/1/08 <br />MW -5 <br />7/30/08 <br />MW -5 <br />1/15/09 <br />MW -5 <br />8/17/09 <br />MW -5 <br />10/7/09 <br />MW -5 <br />2/3/10 <br />MW -5 <br />9/2/10 <br />Monitorina and Field Parameters <br />General Water Ouality Parameters <br />Temperature (°C) (field) <br />24.9 <br />19.9 <br />21.7 <br />18.5 <br />22.1 <br />20 <br />20.9 <br />23.5 <br />Chloride <br />8.8 <br />8.72 <br />8.54 <br />9.01 <br />(7.6) <br />NA <br />7.1 <br />7.7 <br />Nitrate -Nitrogen <br />1.6 <br />1.71 <br />1.69 <br />1.8 <br />1.8 <br />NA <br />1.8 <br />1.9 <br />Total Dissolved Solids <br />184 <br />160 <br />200 <br />220 <br />210 <br />NA <br />210 <br />220 <br />Sulfate <br />9.9 <br />9.93 <br />9.99 <br />10.93 <br />8.8 <br />NA <br />9 <br />9.1 <br />pH (std. units) (field) <br />7.76 <br />7.58 <br />6.91 <br />7.87 <br />7.55 <br />6.98 <br />7.83 <br />7.44 <br />Electrical Conductivity (umhos/cm) (field) <br />258 <br />258.8 <br />250.8 <br />259.6 <br />260.8 <br />261.7 <br />254.7 <br />258.6 <br />Turbidity (NTU) (field) <br />29.7 <br />12.9 <br />10.3 <br />11.7 <br />8.9 <br />13.3 <br />7.4 <br />27.6 <br />Calcium <br />21.1 <br />22 <br />20 <br />21 <br />22 <br />NA <br />21 <br />21 <br />Potassium <br />3.68 <br />3.6 <br />3.6 <br />3.7 <br />3.7 <br />NA <br />3.6 <br />3.5 <br />Magnesium <br />10.6 <br />11 <br />11 <br />11 <br />11 <br />NA <br />11 <br />I1 <br />Sodium <br />14.8 <br />14 <br />14 <br />13 <br />15 <br />NA <br />15 <br />15 <br />Volatile Organic Compounds (ua/Il <br />Benzene <br /><0.17 <br /><0.30 <br /><0.33 <br /><0.33 <br /><0.18 <br />NA <br /><0.086 <br /><0.083 <br />Bromochloromethane <br />NA <br />NA <br /><0.37 <br /><0.32 <br /><0.35 <br />NA <br /><0.23 <br /><0.024 <br />Bromodichloromethane <br />NA <br />NA <br /><0.30 <br /><0.28 <br /><0.30 <br />NA <br /><0.12 <br /><0.14 <br />Bromoform <br />NA <br />NA <br /><0.31 <br /><0.31 <br /><0.24 <br />NA <br /><0.23 <br /><0.27 <br />Bromomethane <br />NA <br />NA <br /><0.40 <br /><0.33 <br /><0.21 <br />NA <br /><0.20 <br /><0.25 <br />Carbon Tetrachloride <br />NA <br />NA <br /><0.46 <br /><0.46 <br /><0.19 <br />NA <br /><0.18 <br /><0.18 <br />Chlorobenzene <br /><0.16 <br /><0.36 <br /><0.39 <br /><0.39 <br />NA <br />NA <br /><0.081 <br /><0.093 <br />Chloroethane <br /><0.2 <br /><0.38 <br /><0.38 <br /><0.31 <br /><0,25 <br />NA <br /><0.II <br /><0.14 <br />Chloroform <br /><0.20 <br /><0.33 <br /><0.33 <br /><0.33 <br /><023 <br />NA <br /><0.072 <br /><0.12 <br />Chloromethane <br /><0.25 <br /><0.41 <br /><0Al <br /><0.36 <br /><0.20 <br />NA <br /><0.II <br /><0.12 <br />Dibromochloromethane <br />NA <br />NA <br /><0.32 <br /><0.31 <br /><0.23 <br />NA <br /><0.077 <br /><0.13 <br />1,2-Dibromo-3-chloropropane <br />NA <br />NA <br /><0.69 <br /><0.69 <br /><0.46 <br />NA <br /><0.44 <br /><0.44 <br />1 2-Dibromoethane (EDB) <br />NA <br />NA <br /><0.39 <br /><0.39 <br /><0.29 <br />NA <br /><0.16 <br /><0.16 <br />Dibromomethane <br />NA <br />NA <br /><0.38 <br /><0.38 <br /><0.37 <br />NA <br /><0.19 <br /><0.24 <br />1,2 -Dichlorobenzene <br />NA <br />NA <br /><0.38 <br /><0.38 <br /><0.15 <br />NA <br /><0.068 <br /><0.072 <br />1,3 -Dichlorobenzene <br />NA <br />NA <br /><0.37 <br /><0.37 <br /><0.15 <br />NA <br /><0.060 <br /><0.15 <br />1,4 -Dichlorobenzene <br /><0.14 <br /><0.34 <br /><0.38 <br /><0.38 <br /><0.16 <br />NA <br /><0.083 <br /><0.062 <br />Dichlorodifluoromethane <br />NA <br />NA <br /><0.68 <br /><0.56 <br /><0.21 <br />NA <br /><0.11 <br /><0.099 <br />1, 1 -Dichloroethane <br />NA <br />NA <br /><0.37 <br /><0.34 <br /><0.13 <br />NA <br /><0.081 <br /><0.II <br />1,2-Dichloroethane (EDC) <br />NA <br />NA <br /><0.38 <br /><0.38 <br /><0.24 <br />NA <br /><0.14 <br /><0.17 <br />1, 1 -Dicbloroethene <br /><0.39 <br /><0.43 <br /><0A3 <br /><0.29 <br /><0.16 <br />NA <br /><0.12 <br /><0.18 <br />cis-1,2-Dichloroethene <br />NA <br />NA <br /><0.36 <br /><0.34 <br /><0.32 <br />NA <br /><0.11 <br /><0.085 <br />trans-l,2-Dichloroethene <br />NA <br />NA <br /><0.41 <br /><0.33 <br /><0.14 <br />NA <br /><0.097 <br /><0.15 <br />1 2-Dichloropropene <br />NA <br />NA <br /><0.35 <br /><0.35 <br /><0 16 <br />NA <br /><0 12 <br /><0.13 <br />cis -1 3-Dichloropropene <br />NA <br />NA <br /><0.30 <br /><0.29 <br /><0 19 <br />NA <br /><Q098 <br /><0.14 <br />trans -1 3-Dichloropropene <br />NA <br />NA <br /><0.35 <br /><035 <br /><0 13 <br />NA <br /><0.079 <br /><0.079 <br />Ethylbenzene <br />NA <br />NA <br /><0.43 <br /><0.43 <br /><0.14 <br />NA <br /><0.12 <br /><0.098 <br />Hexachlorobutadiene <br />NA <br />NA <br /><0.65 <br /><0.65 <br /><0.26 <br />NA <br /><0.12 <br /><0.17 <br />Methylene Chloride <br /><0.48 <br /><0.30 <br /><0.30 <br /><0.29 <br /><0.28 <br />NA <br /><0.28 <br /><0.48 <br />