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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> GROUNDWATER <br /> FOOTHILL SANITARY LANDFILL <br /> M -2 <br /> Units:mg/l,unless noted <br /> Sample esigna on -2 <br /> Sampling Date 8/1/02 10/14/02 1/29/03 5/30/03 <br /> Monitoring and Field Parameters <br /> General Water Quality Parameters <br /> Temperature( C)(field) 20.6 20.6 15.9 20.3 <br /> Chloride 7.4 8 7.7 7.4 <br /> Nitrate-Nitrogen 3.3 3.4 3.5 3.4 <br /> Total Dissolved Solids 160 170 160 170 <br /> u fate 2.1 2.3 2.1 2.2 <br /> H(std.urnts (field) 7.16 6.79 6.81 7.7 <br /> Electrical Conductivity(UMhOS/CM) 260 240 369 201 <br /> Turbidity NTU (field) 7.1 7.7 3.9 1 <br /> --Calcium NM 18 <br /> Potassium NM <0.92 <br /> Magnesium NM 7.8 <br /> Sodium NM 9.3. <br /> Volatile Or anic Com ounds u /I <br /> Trichloroethene <0.06 <0.2 <0.36 <0.36 <br /> 1,1-DTch oroet ene <0.06 <0.2 <0.24 <0.24 <br /> Chloroform <0.07 <0.3 <0.37 <0.37 <br /> Benzene <0.5 <0.20 <0.28 <0.28 <br /> m p- ene <0.21 <0.20 <0.38 <0.3 <br /> hiorobenzene <0.07 <0.2 <0.32 <0.3 <br /> Methylene Chloride <0.06 <0.3 <0.23 <0.23 <br /> Acetone {2.2 <2.0 <0.52 <0.52 <br /> Na t alene <0.10 <0.3 <0.93 <0.93 <br /> Methyl tert-buty ether <0.08 <0.3 <0.3 <0.36 <br /> Toluene <0.07 <0.2 <0.32 <0.32 <br /> 1,4-Dichlorobenzene < .11 <0.2 <0.46 <0.46 <br /> eFa-c loroet ene <0.08 <0.3 <0.44 <0.44 <br /> - utanone <0.70 <2.0 <0.14 <0.14 <br /> 3- ichloro ro ane <0.09 <0.2 <0.40 <0.40 <br /> Chloromethane <0.14 < .3 <0.18 <0.18 <br /> 1,2,4- r me enzene 0.69 <br /> 1, -Trimet ylbenzene 0.29* <br /> Constituents of Concern Parameters <br /> Semivolatile Organic Compounds <br /> (EPA Method 3520/8270) <br /> All Compounds NR NR NR NR <br /> Organochlorine Pesticides and Polychlorinated Biphenyl's <br /> (EPA Method 3510/8080) <br /> All ompounds NR NR NR 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 /> NO=Not Detected <br /> NM=Not Measured <br /> NR=Not Required <br /> MW-2(abandoned):Printed:1/30/2004 115 of 28 <br />