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HISTORICAL SUqWaF ANALYTICAL RESULT: <br /> ® NDWATER <br /> FOOTHIL ANITARY LANDFILL <br /> MW-2R <br /> Units:mg/l,unless noted <br /> Sample Designation MW-2R MW-2R MW-2R MW-2R <br /> Sampling Date 8/13/03 1/21/04 7/21/04 2/2/05 <br /> Monitorina and Field Parameters <br /> General Water Quality Parameters <br /> Temperature(°C)(field) 21.9 14 24.8 18.8 <br /> Chloride 6.7 7.1 6.7 2 <br /> Nitrate-Nitrogen 31 31 2.9 2.6 <br /> Total Dissolved Solids 150 180 170 150 <br /> Sulfate 2.4 2.3 1.8 2 <br /> pH(std units)(field) 6.58 7.19 7.24 7.14 <br /> Electrical Conductivity(umhos/cm)( 203 284 207 221 <br /> Turbidity(NTU)(field) 5.2 10.7 3.74 9.8 <br /> Calcium 15 15 15 16 <br /> Potassium 1.4 2.4 2.8 4.1 <br /> Magnesium 8.6 7.6 7.6 7.7 <br /> Sodium 12 11 11 13.2 <br /> Volatile Organic Compounds(ug/I) <br /> Trichloroethene(TCE) <0.36 <0.36 <0.36 <0.13 <br /> 1,1-Dichloroethene <0.24 <0.24 <0.24 <0.39 <br /> Chloroform <0.37 <0.37 <0.37 <0.20 <br /> Benzene <0.28 <0.28 <0.28 <0.17 <br /> m/p-Xylene <0.38 <0.38 <0.38 NR <br /> Chlorobenzene <0.32 <0.32 <0.32 <0.16 <br /> Methylene Chloride <0.23 <0.23 <0.23 <0.48 <br /> Acetone (0.90*) <0.52 <0.52 (3.7*) <br /> Napthalene <0.93 <0.93 <0.93 <0.24 <br /> Methyl ter-butyl ether <0.36 <0.36 <0.36 <0.32 <br /> Toluene <0.32 <0.32 <0.32 <0.22 <br /> 1,4-Dichlorobenzene <0.46 <0.46 <0.46 <0.14 <br /> Tetrachloroethene <0.44 <0.44 <0.44 <0.19 <br /> 2-Butanone <0.14 <0.14 <0.14 <0.92 <br /> 13-Dichloropropane <0.40 <0.40 <0.40 <0.12 <br /> Chloromethane <0.18 <0.18 <0.18 (0.28*) <br /> 1 2 4-Trimethylbenzene <0.18 <0.18 <0.18 <0.23 <br /> 1 3 5-Trimethylbenzene <0.28 <0.28 <0.28 <0.20 <br /> Constituents of Concern Parameters <br /> Semivolatile Organic Compounds (EPA Method 3520/8270) <br /> All Compounds NR NR ND NR <br /> Organochlorine Pesticides and Polychlorinated Biphenyl's <br /> (EPA Method 3510/8080) <br /> All Compounds NR NR ND 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:7/15/2005 9 of 28 <br />