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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />GROUNDWATER <br />FOOTHILL SANITARY LANDFILL <br />Units: mg/l, unless noted <br />Sample Designation LW -1 LW -1 LW -1 LW -1 LW -1 LW -1 LW -1 LW -1 LW -1 LW -1 LW -1 <br />Sampling Date 11/28/94 5/30/03 8/14/03 1/22/04 7/21/04 2/2/05 7/27/05 3/28/06 7/27/06 1/31/07 7/23/07 <br />Monitoring and Field Parameters <br />Temperature (°C) (field) 17.3 <br />21.2 <br />19.1 <br />14.7 <br />21.6 <br />16.1 <br />20.4 <br />14.9 <br />19.6 <br />17.6 <br />21 <br />Chloride 9.5 <br />10 <br />12 <br />6.6 <br />I1 <br />9 <br />11 <br />8.4 <br />11 <br />8.8 <br />9 <br />Nitrate -Nitrogen 1.2 <br />1.3 <br />1.3 <br />3.3 <br />1.1 <br />1.4 <br />1.1 <br />1.1 <br />1 <br />1.2 <br />1 <br />Total Dissolved Solids 182 <br />190 <br />180 <br />200 <br />210 <br />180 <br />200 <br />199 <br />228 <br />170 <br />190 <br />Sulfate 15 <br />16 <br />19 <br />5.5 <br />16 <br />15 <br />16 <br />14 <br />16 <br />14 <br />14 <br />pH (std. units) (field) 7.68 <br />7.57 <br />6.86 <br />6.94 <br />7.14 <br />7.03 <br />7.21 <br />6.81 <br />6.8 <br />7.23 <br />7.27 <br />Electrical Conductivity (umhos/cm) (field) 313 <br />269 <br />171 <br />174 <br />119.7 <br />212 <br />98 <br />143 <br />146 <br />413 <br />245 <br />Turbidity (NTU) (field) 1.6 <br />0.6 <br />2.7 <br />3.74 <br />7.31 <br />4.7 <br />6.6 NR <br />6.1 <br />18.9 <br />NA <br />Calcium <br />28 <br />24 <br />23 <br />-<0.923.6 <br />23 <br />23.9 <br />27.4 <br />29.7 <br />29.2 <br />24 <br />25 <br />Potassium <br /><0.92 <br />4.0 <br />4.8 <br />10.2 <br />13.2 <br />11.6 <br />10.0 <br />4.7 <br />Magnesium <br />9.8 <br />9.9 <br />10 <br />9.8 <br />10.0 <br />4.6 <br />5.7 <br />4.6 <br />4.7 <br />10 <br />Sodium <br />9.8 <br />12 <br />12 <br />12 <br />12.4 <br />12.8 <br />14.6 <br />13.9 <br />13 <br />13 <br />Volatile Organic Comoo ands (un/Il <br />Trichloroethene (TCE) <br /><0.36 <br /><0.36 <br /><0.36 <br /><0.36 <br /><0.13 <br /><0.13 <br /><0.13 <br /><0.13 <br /><0.13 <br /><0.13 <br />1,1-Dichloroethene <br /><0.24 <br /><0.24 <br /><0.24 <br /><0.24 <br /><0.39 <br /><0.39 <br /><0.39 <br /><0.39 <br /><0.39 <br /><0.39 <br />Chloroform <br /><0.37 <br /><0.37 <br /><0.37 <br /><0.37 <br /><0.20 <br /><0.20 <br /><0.20 <br /><0.20 <br /><0.20 <br /><0.20 <br />Benzene <br /><0.28 <br /><0.28 <br /><0.28 <br /><0.28 <br /><0.17 <br /><0.17 <br /><0.17 <br /><0.17 <br /><0.17 <br /><0.17 <br />m/p-Xylene <br /><0.38 <br /><0.38 <br /><0.38 <br /><0.38 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Chlorobenzene <br /><0.32 <br /><0.32 <br /><0.32 <br /><0.32 <br /><0.16 <br /><0.16 <br /><0.16 <br /><0.16 <br /><0.16 <br /><0.16 <br />Methylene Chloride <br /><0.23 <br />(0.28") <br /><0.23 <br /><0.23 <br /><0.48 <br /><0.48 <br /><0.48 <br /><0.48 <br /><0.48 <br /><0.48 <br />Acetone <br /><0.52 <br />(1.2") <br /><0.52 <br /><0.52 <br /><1.8 <br /><1.8 <br /><1.8 <br /><1.8 <br /><1.8 <br /><1.8 <br />Napthalene <br /><0.93 <br /><0.93 <br /><0.93 <br /><0.93 <br /><0.24 <br /><0.24 <br /><0.24 <br /><0.24 <br /><0.24 <br /><0.24 <br />Methyl ter -butyl ether <br /><0.36 <br /><0.36 <br /><0.36 <br /><0.36 <br /><0.32 <br /><0.32 <br /><0.32 <br /><0.32 <br /><0.32 <br /><0.32 <br />Toluene <br /><0.32 <br /><0.32 <br /><0.32 <br /><0.32 <br /><0.22 <br /><0.22 <br /><0.22 <br /><0.22 <br /><0.22 <br /><0.22 <br />1,4 -Dichlorobenzene <br /><0.46 <br /><0.46 <br /><0.46 <br /><0.46 <br /><0.14 <br /><0.14 <br /><0.14 <br /><0.14 <br /><0.14 <br /><0.14 <br />Tetrachloroethene <br /><0.44 <br /><0.44 <br /><0A4 <br /><0.44 <br /><0.19 <br /><0.1 <br /><<O.19 <br /><0.19 <br /><0.19 <br /><0.19 <br />2-Butanone <br /><0.14 <br /><O.14 <br /><0.14 <br /><0.14 <br /><0.92 <br /><0.92 <br /><0.92 <br /><0.92 <br /><0.92 <br /><0.92 <br />1,3-Dichloropropane <br /><0.40 <br /><0.40 <br /><0.40 <br /><0.40 <br /><0.12 <br /><0.12 <br /><0.12 <br /><0.12 <br /><0.12 <br /><0.12 <br />Chloromethane <br /><0.18 <br /><0.18 <br /><0.18 <br /><0,18 <br /><0.25 <br /><0.25 <br /><0.25 <br /><0.25 <br /><0.25 <br /><0.25 <br />Chloroethane <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br />Carbon disulfide <br /><0.I I <br /><0.1I <br /><0.1 I <br /><0.I I <br />1,2,4-Trimethylbenzene <br /><0.18 <br /><0.18 <br /><0.18 <br /><0.18 <br /><0.23 <br /><0.23 <br /><0.23 <br /><0.23 <br /><0.23 <br /><0.23 <br />1,3,5-Trimethyibenzene <br /><0.28 <br /><0.28 <br /><0.28 <br /><0.28 <br /><0.20 <br /><0.20 <br /><0.20 <br /><0.20 <br /><0.20 <br /><0.20 <br />Constituents of Concern Parameter <br />Semivolatile Organic Compounds (EPA Method 3520/8270) <br />All Compounds ND <br />NR <br />NR <br />NR <br />ND <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Organochlorine Pesticides and Polychlorinated Biphenyl's <br />(EPA Method 3510/8080) <br />All Compounds ND <br />NR <br />NR <br />NR <br />ND <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />* = Trace Concentration <br />[I] This analytical result appears to be anomalous and therefore was not used <br />( I ) Parameter also detected in one or more quality control blanks <br />ND = Not Detected <br />NM = Not Measured <br />NR = Not Reouired <br />in statistical evaluation <br />procedures. <br />n:\consulting\data\shared\projects\xls\qmr\79\791289\FHO12208g1 (2).xls <br />MMMAN a M r <br />