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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />LEACHATE <br />FOOTHILL SANITARY LANDFILL <br />L-1 <br />Units: mg/I, unless noted <br />Sample Designation L-1 L-1 L-1 L-1 L-1 L-1 L-1 L-1 L-1 L-1 L-1 <br />Sampling Date 3/7/05 3/28/06 1/31/07 2/5/08 1/15/09 8/18/09 2/3/10 1/25/11 1/11/12 2/4/13 1/21/14 <br />Monitoring and Field Parameters <br />General Water Quality Parameters <br />pH (std. units) <br />6.12 <br />6.81 <br />6.35 <br />8.54 <br />6.6 <br />6.2 <br />6.72 <br />7.19 <br />6.59 <br />6.64 <br />7.07 <br />Electrical Conductivity (umhos/cm) <br />3,470 <br />280 <br />3,070 <br />1,229 <br />2,415 <br />2,154 <br />1,217 <br />1,172 <br />563 <br />2,236 <br />1,673 <br />Temperature (°C) <br />NT <br />16.4 <br />11 <br />18.3 <br />17.9 <br />23.7 <br />18.5 <br />20.2 <br />16.9 <br />21.8 <br />23.9 <br />Turbidity (NTU) field <br />NT <br />NT <br />13.7 <br />51.6 <br />NT <br />31.7 <br />NT <br />21.6 <br />NT <br />31.4 <br />29.7 <br />Chloride <br />168 <br />251 <br />300 <br />34 <br />260 <br />NT <br />66 <br />170 <br />280 <br />360 <br />190 <br />Nitrate Nitrogen <br /><0.4 <br />0.06* <br />0.3 <br /><0.02 <br /><0.03 <br />NT <br /><0.026 <br /><0.014 <br />1.1 <br /><0.042 <br /><0.20 <br />Total Dissolved Solids <br />3,650 <br />2,280 <br />1,900 <br />800 <br />1,500 <br />NT <br />720 <br />1,000 <br />1,400 <br />1,400 <br />1,000 <br />Sulfate <br />11 <br /><0.2 <br />0.3* <br />0.82 <br /><0.20 <br />NT <br />0.56 <br /><0.10 <br />6.9 <br />16 <br />3.9 <br />Calcium, Dissolved <br />455 <br />398 <br />270 <br />140 <br />220 <br />NT <br />120 <br />170 <br />200 <br />210 <br />130 <br />Magnesium, Dissolved <br />201 <br />302 <br />160 <br />62 <br />120 <br />NT <br />51 <br />77 <br />100 <br />97 <br />68 <br />Potassium, Dissolved <br />13 <br />10 <br />9.1 <br />3.8 <br />6.4 <br />NT <br />4.3 <br />7.4 <br />6.9 <br />7.2 <br />5.4 <br />Sodium, Dissolved <br />146 <br />193 <br />190 <br />44 <br />140 <br />NT <br />54 <br />87 <br />140 <br />130 <br />120 <br />Volatile Organic Compounds (ugAl <br />9 <br />2.7 <br />10 <br />6.3 <br />5 <br />NT <br />1.6 <br />1.2 <br />0.65 <br />0.72 <br />0.26" <br />Benzene <br />NT <br />NT <br />NT <br />11 <br />14 <br />NT <br />15 <br />13 <br />6.4 <br />11 <br />6.6 <br />Bromochloromethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.23 <br /><0.24 <br /><0.24 <br /><0.24 <br /><0.24 <br />Bromodichloromethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.12 <br /><0.14 <br /><0.14 <br /><0.14 <br /><0.14 <br />Bromoform <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.23 <br /><0.27 <br /><0.27 <br /><0.27 <br /><0.27 <br />Bromomethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.20 <br /><0.25 <br /><0.25 <br /><0.25 <br /><0.25 <br />Carbon Tetrachloride <br />NT <br />NT <br />NT <br />NI' <br />NT <br />NT <br /><0.18 <br /><0.18 <br /><0,18 <br /><0.18 <br /><0.18 <br />Chlorobenzene <br />NT <br />IVT <br />NT <br />NT <br />NT <br />NT <br />0.43 <br />0.43' <br />0.31" <br />0.30* <br /><0.50 <br />Chloroethane <br /><0.2 <br />23 <br />15 <br />7 <br />6.1 <br />NT <br />3.9 <br />2.6 <br />0.38^ <br /><0.14 <br />0.60 <br />Chloroform <br />3 <br /><0.14 <br /><0.4 <br /><1.7 <br /><0.33 <br />NT <br /><0.072 <br /><0.12 <br /><0.12 <br /><0.12 <br /><0.12 <br />Chloromethane <br /><0.23 <br />2.1 <br /><0A <br />2.1* <br /><0.36 <br />NT <br /><0.11 <br /><0.14 <br /><0.14 <br /><0.14 <br /><0.14 <br />Dibromochloromethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.077 <br /><0.13 <br /><0.13 <br /><0.13 <br /><0.13 <br />1,2-Dibromo-3-chloropropane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.44 <br /><0.44 <br /><0.44 <br /><0.44 <br /><0.44 <br />1,2-Dibromoethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><016 <br /><0.16 <br /><0.16 <br /><0.16 <br /><0.16 <br />Dibromomethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.19 <br /><0.24 <br /><0.24 <br /><0.24 <br /><0.24 <br />1,2 -Dichlorobenzene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />0.32 <br />0.30" <br />0.24* <br />0.18" <br />0.32- <br />1,3 -Dichlorobenzene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NP <br /><0.060 <br /><0.15 <br /><0.15 <br />5.4 <br /><015 <br />1,4 -Dichlorobenzene <br />NT <br />NT <br />NT <br />2.1* <br />1.7 <br />NT <br />7.2 <br />7.6 <br />6.5 <br />5.9 <br />7.8 <br />Dichlorodifluoromethane <br />NT <br />NT <br />NT <br />NT <br />0.56• <br />NT <br /><0.11 <br /><0.099 <br />0.25* <br /><0.099 <br /><0.099 <br />1,1-Dichloroethane <br />9 <br />2.7 <br />10 <br />6.3 <br />5 <br />NT <br />1.6 <br />1.2 <br />0.65 <br />0.72 <br />0.26" <br />1,2-Dichloroethane (EDC) <br /><0.18 <br />2.4 <br />7.9 <br />8 <br />9.1 <br />NT <br />9 <br />4.9 <br /><0.17 <br />3.4 <br />5.1 <br />1,1-Dichloroethene <br /><0.19 <br />0.58 <br />65 <br />5.9 <br />2.3 <br />NT <br /><0.12 <br /><0.18 <br /><0.18 <br /><0.18 <br /><0.18 <br />cis-1,2-Dichloroethene <br /><0.17 <br />8.1 <br />4.2 <br />9.4 <br />18 <br />NT <br />21 <br />5.8 <br />4.4 <br />16 <br />2.9 <br />trans-1,2-Dichloroethene <br />NT <br />NI' <br />NT <br />NT <br />NT <br />NT <br /><0.097 <br /><015 <br /><0.15 <br /><0.15 <br /><0.15 <br />1,2-Dichloropropane <br /><0.17 <br />0.66 <br /><0.4 <br /><1.8 <br />1.2 <br />NT <br />1 <br />0.83 <br />0.63 <br />0.95 <br />0.68 <br />cis-1,3-Dichloropropene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.098 <br /><0.14 <br /><0.14 <br /><0.14 <br /><0.14 <br />trans-1,3-Dichloropropene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.079 <br /><0.079 <br /><0.079 <br /><0.079 <br /><0.079 <br />Ethylbenzene <br />2 <br />4.7 <br /><0.41 <br />7 <br />12 <br />NT <br />25 <br />23 <br />12 <br />9.3 <br />13 <br />Hexachlorobutadiene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.12 <br /><0.17 <br /><0.17 <br /><0.17 <br /><0.17 <br />Methylene Chloride <br />150 <br />7.5 <br />7.6* <br />12 <br />3 <br />NT <br /><0.28 <br /><0.48 <br /><0.48 <br /><0.48 <br /><0.48 <br />Methly tert-butyl ether <br />10 <br />490 <br />100 <br />22 <br />190 <br />NT <br />Naphthalene <br />NT <br />NT <br />NT <br />NT <br />0.51* <br />NT <br />Styrene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />1,1,1,2 -Tetrachloroethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />1,1,2,2 -Tetrachloroethane <br />NI <br />NT <br />NT <br />NT <br />NT <br />NT <br />n:\consulting\data\shared\prof ects\xls\gmr\79\791289\FH-Hist.xls <br />52 45 18 21 9.6 <br />11 8.6 <br /><0.093 0.44- <br /><0.11 <0.18 <br /><0,14 <0.17 <br />10 6.5 22 <br /><0.068 <0.068 <0.068 <br /><0.18 <0.18 <0.18 <br /><0.17 <0.17 <0.17 <br />® =man MM � <br />