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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />GROUNDWATER <br />FOOTHILL SANITARY LANDFILL <br />Units: 2g/1, unless noted <br />Sample Designation MW -3 <br />Sampling Date 7/27/06 <br />Monitoring and Field Parameters <br />Temperature (°C) (field) <br />21.5 _ <br />Chloride <br />10 <br />Nitrate -Nitrogen <br />-- <br />3 <br />Total Dissolved Solids <br />229 <br />Sulfate <br />6 <br />pH (std. units) (field) <br />7.14 <br />Electrical Conductivity (umbos/cm) (field) <br />341 <br />Turbidity (NTU) (field) <br />12.7 <br />Calcium <br />25.6 <br />Potassium <br />13.1 <br />Magnesium <br />3.8 <br />Sodium <br />17.9 <br />Volatile Organic Compounds CtWM <br />Trichloroethene (TCE) <br />0.18* <br />1,1-Dichloroethene <br /><0.39 <br />Chloroform <br /><0.20 <br />Benzene <br /><0.17 <br />m/p-Xylene <br />NR <br />Chlorobenzene <br /><0.16 <br />Methylene Chloride <br /><0.48 <br />Acetone <br /><1.8 <br />Napthalene <br /><0.24 <br />Methyl ter -butyl ether <br /><0.32 <br />Toluene <br /><0.22 <br />1,4 -Dichlorobenzene <br /><0.14 <br />Tetrachloroethene <br /><0.19 <br />2-Butanone <br /><0.92 <br />1,3-Dichloropropane <br /><0.12 <br />Chloromethane <br /><0.25 <br /><0.23 <br /><0.23 <br />1,2,4-Trimethylbenzene <br /><0.23 <br />1,3,5-Trimethylbenzene <br /><0.20 <br />Constituents of Concern Parameters <br />Semivolatile Organic Compounds (EPA Method 3520/8270) <br />Bis(2-ethythexyl)phthalate NR <br />All Compounds NR <br />Organochlorine Pesticides and Polvchlormwed Biohowl's <br />(EPA Method 3510/8080) <br />All Compounds NR <br />" = Trace Concentration <br />[I j This analytical result appears to be anomalous and therefore was not used in statistical evaluation procedures. <br />I } Parameter also detected in one or more quality control blanks <br />NO = Not Detected <br />NM = Not Measured <br />NR = Not Required <br />n: \consulting\data\sharedlproj ectsbds\gmr\79\791289THO 11207g i <br />