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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> GROUNDWATER <br /> FOOTHILL SANITARY LANDFILL <br /> MW-3 <br /> Units:m n,unless noted <br /> Sample Designation - <br /> Sampling Date 8/14/03 <br /> Monitoring and Field Parameters <br /> General Water Quality Parameters <br /> Temperature(°C)(field) 19.6 <br /> Chloride 11 <br /> Nitrate-Nitrogen 3.8 <br /> Total Dissolved Solids 190 <br /> Sulfate 7.6 <br /> pH(stdunits)(field) 7.02 <br /> Electrical Conductivity(umhos/cm) 274 <br /> Turbidity(NTU)(field) 6.7 <br /> Calcium 25 <br /> Potassium 1.5 <br /> __Magnesium 13 <br /> Sodium 18 <br /> Volatile QLganlc Compounds(ug/I) <br /> Trichloroethene(TCE) <0.36 <br /> 1,1-Dichioroethene <0.24 <br /> Chloroform <0.37 <br /> Benzene <0.28 <br /> m/p-Xylene <0.38 --- — <br /> Chlorobenzene <0.32 <br /> Mbtfiyfeine aloride <br /> Acetone <br /> Napthalene <0_93 <br /> Methyl tert- utyl ether <0.36 <br /> Toluene <0.32 <br /> 1,4-Dichlorobenzene <0.46 _ <br /> Tetrachloroethene <0.44 <br /> 2-9utanone <0.14 <br /> 1 3-Dichloropropane <0.40 _ <br /> Chloromethane (0.22*) <br /> 1 2 4-Trimethyibenzene <0.18 <br /> 1 3 5-Trimethyibenzene <0.28 <br /> Constituents of Concern Parameters <br /> Semivolatile Organic Compounds <br /> (EPA Method 3520/8270) <br /> All Compounds NR <br /> Organochlorine Pesticides and Polychlorinated Biphenvl's <br /> (EPA Method 3510/8080) <br /> All Compounds NR <br /> Trace Concentration <br /> [1]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 /> MW-3;Printed:1/30/2004 23 of 28 <br />