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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> GROUNDWATER <br /> FOOTHILL SANITARY LANDFILL <br /> MW-2R <br /> Units:mg/l,unless noted <br /> pie Designation -2 <br /> Sampling Date 8/13/03 <br /> Monitorind and Field Parameters <br /> General Water Quality Parameters <br /> eTemprature(°C)(fie d) 21.9 <br /> 6.7 <br /> Nitrate-Nitrogen 3.1 <br /> Total Dissolved olids 150 <br /> Sulfate, 2.4 <br /> pH(std.units)(field) 6.58 <br /> E ectrical Conductivity(um os/cm) 203 <br /> Turbidity(NTU)(field) 5.2 <br /> calcium 15 <br /> gtassium 1.4 <br /> Magnesium 8. <br /> Sodium 12 <br /> Volatile Organic Compounds(ug/1) <br /> Trichloroethene(T ) <0.35 <br /> 1,1-Dic oroethene <0.24 <br /> Chloroform <0.37 <br /> enzene <0.28 <br /> m/ - ene <0.38 <br /> h orobenzene <0.32 <br /> Methylene Chloride <0.23 <br /> Acetone (0.90*) <br /> Napthalene <0.93 <br /> Methyl ter-butyl ether <0.36 <br /> Toluene <0.32 <br /> 1,4-Dichlorobenzene <0.46 <br /> etrac oroethene <0.44 <br /> 2-Butanone <0.14 <br /> 1,3-Dichloro ro ane <0.40 <br /> loromethane <0.18 <br /> 1,2,4- nmeth enzene <0.18 <br /> -,3, - methyl enzene <0.28 <br /> Constituents of Concern Parameters <br /> Semivolatile Organic Compounds <br /> (EPA Method 3520/8270) <br /> All Compounds N <br /> Organochlorine Pesticides and Polychlorinated Biphenyl'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-2R;Printed:1/30/2004 17 of 28 <br />