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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />GROUNDWATER <br />FOOTHILL SANITARY LANDFILL <br />Units: nwA unless noted <br />Sample Designation <br />Sampling Date <br />MW -3 <br />3/8/00 <br />MW -3 <br />5111/00 <br />MW -3 <br />7/13/00 <br />MW -3 <br />1/22/04 <br />MW -3 <br />1/15/01 <br />MW -3 <br />4/30/01 <br />MW -3 <br />8/2/01 <br />MW -3 <br />10/29/01 <br />MW -3 <br />2/6/02 <br />MW -3 <br />4/30/02 <br />MW -3 <br />8/1/02 <br />MW -3 <br />10/14/02 <br />MW -3 <br />1/29/03 <br />MW -3 <br />5/30/03 <br />MW -3 <br />8/14/03 <br />MW -3 <br />1/21/04 <br />MW -3 <br />7/22/04 <br />MW -3 <br />2/2/05 <br />MW -3 <br />7/27/05 <br />MW -3 <br />3/28/06 <br />Monitoring and Field Parameters <br />General Water Quality _p <br />et <br />('C) (field) <br />17.3 <br />20.5 <br />21.7 <br />20 <br />23.7 <br />19.3 <br />20.8 <br />19.1 <br />16.9 <br />18.8 <br />20.6 <br />20.3 <br />16.1 <br />21.3 <br />19.6 <br />14.4 <br />21.6 <br />16.9 <br />21.4 <br />16.7 <br />Chloride <br />9.7 <br />9.73 <br />9.6 <br />9.96 <br />12 <br />9.76 <br />9 <br />11 <br />12 <br />9.3 <br />10 <br />11 <br />11 <br />NM <br />11 <br />I1 <br />11 <br />10 <br />11 <br />9.8 <br />Nitrate -Nitrogen <br />3.21 <br />3.45 <br />3.36 <br />3.5 <br />3.64 <br />3.48 <br />3 <br />3.5 <br />4 <br />3.5 <br />3.8 <br />3.2 <br />3.8 <br />NM <br />3.8 <br />3.8 <br />3.6 <br />3.2 <br />3.3 <br />2.9 <br />Total Dissolved Solids <br />202 <br />204 <br />188 <br />196 <br />191 <br />199 <br />200 <br />220 <br />190 <br />200 <br />190 <br />210 <br />190 <br />NM <br />190 <br />210 <br />210 <br />190 <br />210 <br />202 <br />Sulfate <br />7.24 <br />6.98 <br />7.62 <br />7.19 <br />7.66 <br />7.00 <br />6.9 <br />8.8 <br />10 <br />6.4 <br />6.7 <br />6.2 <br />7 <br />NM <br />7.6 <br />7.7 <br />6.8 <br />6 <br />7 <br />5.8 <br />PH (std. units) (field) <br />7.36 <br />7.8 <br />8.23 <br />7.41 <br />7.01 <br />6.6 <br />7.11 <br />6.36 <br />6.8 <br />6.94 <br />7.06 <br />6.72 <br />6.69 <br />7.58 <br />7.02 <br />7.32 <br />7.26 <br />6.88 <br />7.34 <br />6.8 <br />Electrical Conductivity (umhos/cm) (field) <br />264 <br />273 <br />272 <br />272 <br />316 <br />600 <br />190 <br />610 <br />210 <br />290 <br />300 <br />250 <br />377 <br />273 <br />274 <br />207 <br />269 <br />290 <br />258 <br />237 <br />Turbidity (NTU) (field) <br />3.3 <br />0.33 <br />0.55 <br />0.21 <br />2.35 <br />12.1 <br />7.2 <br />17.1 <br />6.3 <br />3.7 <br />3.7 <br />6.7 <br />3.1 <br />0.6 <br />6.7 <br />14.7 <br />7.81 <br />10.6 <br />7.7 <br />21 6 <br />Cal01Um <br />NM <br />21 <br />25 <br />21 <br />20 <br />21.6 <br />23.9 <br />26.3 <br />Potassium <br />NM <br />2.9 <br />15 <br />2.8 <br />3.1 <br />4 <br />11.4 <br />13.8 <br />Magnesium <br />NM <br />11 <br />13 <br />11 <br />11 <br />11.4 <br />42 1 <br />4.45 <br />Sodium <br />NM <br />15 <br />18 <br />15 <br />15 <br />17.2 <br />16 <br />18.7 <br />Volatile Organic Compounds (ug4 <br />Trichloroethene (TCE) <br />0.227* <br />0.652 <br />0.285* <br />0323* <br />0.717 <br />0.435* <br />0.065* <br />0.097* <br /><0.18 <br /><0.D6 <br /><0.06 <br /><0.2 <br /><0.36 <br />NM <br /><0.36 <br /><036 <br /><0.36 <br /><0 13 <br /><0 13 <br /><0.13 <br />1, 1 -Dichloroethene <br /><0.04 <br />0.285* <br />0.0795* <br />0.0688* <br />0316* <br />0.217* <br /><0.06 <br /><0.06 <br /><0.12 <br /><0.06 <br /><0.06 <br /><0.2 <br /><0.24 <br />NM <br /><0.24 <br /><0.24 <br /><0.24 <br /><0.39 <br />039* <br /><039 <br />Chloroform <br /><0.07 <br /><0.06 <br /><0.07 <br /><0.07 <br /><0.07 <br /><0.07 <br /><0.07 <br /><0.07 <br /><0.18 <br /><0.07 <br /><0.07 <br /><0.3 <br /><0.37 <br />NM <br /><037 <br /><037 <br /><037 <br /><020 <br /><020 <br /><D20 <br />Benzene <br /><0.05 <br /><0.04 <br /><0.05 <br /><0.05 <br /><0.05 <br /><0.05 <br /><0.05 <br /><0.05 <br /><0.14 <br /><0.05 <br /><0.05 <br /><0.20 <br /><0.28 <br />NM <br /><0.28 <br /><0.28 <br /><0.28 <br /><0.17 <br /><0.17 <br /><p 17 <br />m/p-Xylene <br /><0.21 <br /><0.21 <br /><0.21 <br /><0.21 <br /><0.21 <br /><0.21 <br /><0.21 <br /><0.21 <br /><0.24 <br /><0.21 <br /><0.21 <br /><0.20 <br /><0.38 <br />NM <br /><0.38 <br /><0.38 <br /><0.38 <br />NR <br />NR <br />NR <br />Chlorobenzene <br /><0.07 <br /><0.07 <br /><0.07 <br /><0.07 <br /><0.07 <br /><0.07 <br /><0.07 <br /><0.07 <br /><0.16 <br /><0.07 <br /><0.07 <br /><0.2 <br /><0.32 <br />NM <br /><0,32 <br /><0.32 <br /><0.32 <br /><016 <br /><016 <br /><016 <br />Methylene Chloride <br />2.43 <br /><0.03 <br /><0.D6 <br /><0.06 <br /><0.06 <br /><0.06 <br /><0.06 <br /><0.06 <br />(1.9) <br /><0.D6 <br /><0.06 <br /><0.3 <br /><0.23 <br />NM <br />{0.28*} <br /><0.23 <br /><0.23 <br /><0.48 <br /><0.48 <br /><0.48 <br />Acetone <br />2.03* <br /><1.79 <br /><1.79 <br /><1.79 <br /><1.79 <br /><1.8 <br /><1.8 <br />(4.4*} <br /><1.8 <br /><1.8 <br /><2.0 <br /><0.52 <br />NM <br />(1.4*) <br /><0.52 <br /><0.52 <br />(3.4*) <br /><I.8 <br /><1,8 <br />Napthalene <br /><0.1 <br /><0.1 <br /><0, i <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.46 <br /><0.1 <br /><D.10 <br /><0.3 <br /><0.93 <br />NM <br /><0.93 <br /><0.93 <br /><0.93 <br /><0.24 <br /><0.24 <br /><0.24 <br />Methyl ter -butyl ether <br /><0.08 <br /><0.08 <br /><0.08 <br /><0.18 <br /><0.08 <br />W.08 <br />1A <br /><0.36 <br />NM <br /><0.36 <br /><0.36 <br /><0.36 <br /><0.32 <br /><0.32 <br /><0.32 <br />Toluene <br /><0.07 <br /><0.07 <br /><0.07 <br /><0.16 <br /><0.07 <br /><0.07 <br /><0.2 <br /><0.32 <br />NM <br /><0.32 <br /><0.32 <br /><0.32 <br /><0.22 <br /><0.22 <br /><0.22 <br />1,4 -Dichlorobenzene <br />0.18* <br /><0.11 <br /><0.23 <br /><0.11 <br /><0.11 <br />0.8 <br /><0.46 <br />NM <br /><0.46 <br /><0.46 <br /><0.46 <br /><0 14 <br /><014 <br /><014 <br />Tetrachloroethene <br />0.086* <br /><0.08 <br /><0.22 <br /><0.08 <br /><0.08 <br /><0.3 <br /><0.44 <br />NM <br /><0.44 <br /><0.44 <br /><0.44 <br /><0.19 <br />0.9 <br />0.9 <br />2-Butanone <br /><0.70 <br /><0.65 <br /><0.70 <br /><0.70 <br /><2.0 <br /><0.14 <br />NM <br /><0.14 <br /><0.14 <br /><0 14 <br /><092 <br /><092 <br /><092 <br />1,3-Dichloropropane <br /><0.20 <br /><0.09 <br /><0.09 <br /><0.2 <br /><0.40 <br />NM <br /><0.40 <br /><0.40 <br /><0.40 <br /><0.12 <br /><0.12 <br /><0.12 <br />Chloromethane <br /><0.14 <br /><0.3 <br /><0.18 <br />NM <br />(0.22*) <br /><0.18 <br /><D.18 <br />(0.28*) <br /><0.25 <br /><0.25 <br />0.52* <br /><0.23 <br />1,2,4-Tninethylbenzene <br />NM <br /><0.18 <br /><0. 18 <br /><0.18 <br /><0.23 <br /><0.23 <br /><0.23 <br />1,3,5-Trimethylbenzene <br />NM <br /><0.28 <br /><0.28 <br /><0.28 <br /><0.20 <br /><0.20 <br /><0.20 <br />Constituents of Concern Parameters <br />Semivolatile Organic Compounds (EPA Method 3520/8270) <br />Bis(2-ethylhexyl)phthalate ND ND 2.6" 98 NR NR <br />All Compounds NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR ND NR NR NR <br />Organochlorine Pesticides and Polychlorinated Biphenyl's <br />(EPA Method 3510/8080) <br />All Compounds NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR ND NR NR NR <br />" = Trace Concentration <br />[ I) This analytical result appears to be anomalous and therefore was not used in statistical evaluation procedures. <br />(1 } Parameter also detected in one or more quality control blanks <br />ND = Not Detected <br />NM = Not Measured <br />NR = Not Required <br />M n:\co4�ta\shomcts\xis'SM9128 7g1 M M ,M M M M M M M I= M M M. <br />