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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />GROUNDWATER <br />FOOTHILL SANITARY LANDFILL <br />Units: mg/l, unless noted <br />Sample Designation MW -1 MW -1 MW -1 MW -1 MW -1 MW -1 MW -1 <br />Sampling Date 7/27/06 1/31/07 7/23/07 2/5/08 7/31/08 2/4/10 5/26/10 <br />Monitorine and Field Parameters <br />General Water Quality Parameters <br />Temperature (°C) (field) <br />21.5 <br />14.8 <br />20.8 <br />18.3 <br />21.1 <br />18.3 <br />21.5 <br />Chloride <br />6 <br />6.1 <br />5.8 <br />5.65 <br />5.64 <br />4.6 <br />NA <br />Nitrate -Nitrogen <br />2.9 <br />3 <br />2.8 <br />2.88 <br />2.84 <br />3.1 <br />NA <br />Total Dissolved Solids <br />206 <br />170 <br />73 <br />I50 <br />130 <br />190 <br />NA <br />Sulfate <br />5 <br />5 <br />4.9 <br />4.84 <br />4.91 <br />4.3 <br />NA <br />pH (std. units) (field) <br />7.14 <br />7.37 <br />7.18 <br />7.26 <br />7.11 <br />7.51 <br />7.69 <br />Electrical Conductivity (umhos/cm) (field) <br />358 <br />393 <br />219 <br />391 <br />368.9 <br />230.1 <br />231.7 <br />Turbidity (NTU) (field) <br />12.6 <br />13.9 <br />11.64 <br />39.7 <br />9.3 <br />9.7 <br />10.3 <br />Volatile Oreanic Compounds (ug/1) <br />Benzene <br /><0.17 <br /><0.17 <br /><0.17 <br /><0.30 <br /><0.33 <br /><0.086 <br />NA <br />Bromochloromethane <br />NA <br />NA <br />NA <br />NA <br /><0.37 <br /><0.23 <br />NA <br />Bromodichloromethane <br />NA <br />NA <br />NA <br />NA <br /><0.30 <br /><0.12 <br />NA <br />Bromoforrn <br />NA <br />NA <br />NA <br />NA <br /><0.31 <br /><0.23 <br />NA <br />Bromomethane <br />NA <br />NA <br />NA <br />NA <br /><0.40 <br /><0.20 <br />NA <br />Carbon Tetrachloride <br />NA <br />NA <br />NA <br />NA <br /><0.46 <br /><0.18 <br />NA <br />Chlorobenzene <br /><0.16 <br /><0.16 <br /><0.16 <br /><0.36 <br /><0.39 <br /><0.081 <br />NA <br />Chloroethane <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.38 <br /><0.38 <br /><0.II <br />NA <br />Chloroform <br /><0,20 <br /><0.20 <br /><0.20 <br /><0.33 <br /><0.33 <br /><0.072 <br />NA <br />Chloromethane <br /><0.25 <br /><0.25 <br /><0.25 <br /><0.41 <br /><0.41 <br /><0.11 <br />NA <br />Dibromochloromethane <br />NA <br />NA <br />NA <br />NA <br /><0.32 <br /><0.077 <br />NA <br />1,2-Dibromo-3-chloropropane <br />NA <br />NA <br />NA <br />NA <br /><0.69 <br /><0.44 <br />NA <br />1,2-Dibromoethane (EDB) <br />NA <br />NA <br />NA <br />NA <br /><0.39 <br /><0.16 <br />NA <br />Dibromomethane <br />NA <br />NA <br />NA <br />NA <br /><0.38 <br /><0.19 <br />NA <br />1,2 -Dichlorobenzene <br />NA <br />NA <br />NA <br />NA <br /><0.38 <br /><0.068 <br />NA <br />1,3 -Dichlorobenzene <br />NA <br />NA <br />NA <br />NA <br /><0.37 <br /><0.060 <br />NA <br />1,4 -Dichlorobenzene <br /><0.14 <br /><0.14 <br /><0.14 <br /><0.34 <br /><0.38 <br /><0.083 <br />NA <br />Dichlorodifluoromethane <br />NA <br />NA <br />NA <br />NA <br /><0.68 <br /><0.11 <br />NA <br />1, 1 -Dichloroethane <br />NA <br />NA <br />NA <br />NA <br /><0.37 <br /><0.081 <br />NA <br />I,2-Dichloroethane (EDC) <br />NA <br />NA <br />NA <br />NA <br /><0.38 <br /><0.14 <br />NA <br />1,1-Dichloroethene <br /><0.39 <br /><0.39 <br /><0.39 <br /><0.43 <br /><0.43 <br /><0.12 <br />NA <br />cis-1,2-Dichloroethene <br />NA <br />NA <br />NA <br />NA <br /><0.36 <br /><0.11 <br />NA <br />trans-l,2-Dichloroethene <br />NA <br />NA <br />NA <br />NA <br /><0.41 <br /><0.097 <br />NA <br />1,2-Dichloropropane <br />NA <br />NA <br />NA <br />NA <br /><0.35 <br /><0.12 <br />NA <br />cis-1,3-Dichloropropene <br />NA <br />NA <br />NA <br />NA <br /><0.30 <br /><0.098 <br />NA <br />trans-l,3-Dichloropropene <br />NA <br />NA <br />NA <br />NA <br /><0,35 <br /><0.079 <br />NA <br />Ethylbenzene <br />NA <br />NA <br />NA <br />NA <br /><0.43 <br /><0.12 <br />NA <br />Hexachlorobutadiene <br />NA <br />NA <br />NA <br />NA <br /><0.65 <br /><0.12 <br />NA <br />Methylene Chloride <br /><0.48 <br /><0.48 <br /><0.48 <br /><0.30 <br /><0.30 <br /><0.28 <br />NA <br />Methyl tert-Butyl Ether <br /><0.32 <br /><0.32 <br /><0.32 <br /><0.70 <br /><0.72 <br /><0.I I <br />NA <br />Napthalene <br /><0.24 <br /><0.24 <br /><0.24 <br /><0.29 <br /><0.36 <br /><0.36 <br />NA <br />Styrene <br />NA <br />NA <br />NA <br />NA <br /><0.32 <br /><0.093 <br />NA <br />1,1,1,2 -Tetrachloroethane <br />NA <br />NA <br />NA <br />NA <br /><0.38 <br /><0.11 <br />NA <br />1,1,2,2 -Tetrachloroethane <br />NA <br />NA <br />NA <br />NA <br /><0.35 <br /><0.14 <br />NA <br />Tetrachloroethene (PCE) <br /><0.19 <br /><0.19 <br /><0.19 <br /><0.40 <br /><0.49 <br /><0.13 <br />NA <br />Toluene <br /><0.22 <br /><0.22 <br /><0.22 <br /><0.32 <br /><0.40 <br />18 <br />0.48 <br />1,2,4-Trichlorobenzene <br />NA <br />NA <br />NA <br />NA <br /><0.36 <br /><0.I7 <br />NA <br />1,1,1-Trichloroethane(TCA) <br />NA <br />NA <br />NA <br />NA <br /><0.39 <br /><0.081 <br />NA <br />1,1,2 -Trichloroethane <br />NA <br />NA <br />NA <br />NA <br /><0.44 <br /><0.21 <br />NA <br />Trichloroethene (TCE) <br /><0.13 <br /><0.13 <br /><0.13 <br /><0.31 <br /><0.38 <br /><0.13 <br />NA <br />Trichlorofluoromethane <br />NA <br />NA <br />NA <br />NA <br /><0.59 <br /><0.11 <br />NA <br />1,2,3-Trichloropropane <br />NA <br />NA <br />NA <br />NA <br /><0.43 <br /><0.30 <br />NA <br />Vinyl Chloride <br />NA <br />NA <br />NA <br />NA <br /><0.47 <br /><0.14 <br />NA <br />Total Xylenes <br />NA <br />NA <br />NA <br />NA <br /><l.l <br /><0.26 <br />NA <br />Acetone <br /><1.9 <br />4.6" <br />7.5x <br /><2.7 <br /><3.0 <br /><4.6 <br />NA <br />