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HISTORICAL SUIMMAWF ANALYTICAL RESULTS <br /> G WATER <br /> FOOTHILL73KNITARY LANDFILL <br /> LW-1 <br /> Units:mg/l,unless noted <br /> Sample Designation LW-1 LW-1 LWA LW-1 LWA LWA LW-1 LW-1 LW-1 <br /> Sampling Date 10/4/93 1/5/94 7/5/94 11/28/94 5/30/03 8/14/03 1/22/04 7/21/04 2/2/05 <br /> Monitoring and Field Parameters <br /> General Water Quality Parameters <br /> Temperature(°C)(field) NR NR NR 17.3 21.2 19.1 14.7 21.6 16.1 <br /> Chloride 8 10 14 9.5 10 12 6.6 11 9 <br /> _Nitrate-Nitrogen 1.1 1.1 1.1 1.2 1.3 1.3 3.3 1.1 1.4 <br /> Total Dissolved Solids 220 230 240 182 190 180 200 210 180 <br /> Sulfate 14 <8 16 15 16 19 5.5 16 15 <br /> pH(std units)(field) 6.40 7.42 7.82 7.68 7.57 6.86 6.94 7.14 7.03 <br /> Electrical Conductivity(umhos/cm) 276 297 300 313 269 171 174 119.7 212 <br /> Turbidity(NTU)(field) NR NR NR 1.6 0.6 2.7 3.74 7.31 4.7 <br /> Calcium 28 24 23 23 23.9 <br /> Potassium <0.92 <0.92 3.6 4.0 4.8 <br /> Magnesium 9.8 9.9 10 9.8 10.0 <br /> Sodium 9.8 12 12 12 12.4 <br /> Volatile Organic Compounds_(u <br /> Trichloroethene(TCE) <0.36 <0.36 <0.36 <0.36 <0.13 <br /> 1,1-Dichloroethene <0.24 <0.24 <0.24 <0.24 <0.39 <br /> Chloroform <0.37 <0.37 <0.37 <0.37 <0.20 <br /> Benzene <0:28 <0.28 <0.28 <0.28 <0.17 <br /> m/p-Xylene <0.38 <0.38 <0.38 <0.38 NR <br /> Chlorobenzene <0.32 <0.32 <0.32 <0.32 <0.16 <br /> Methylene Chloride <0.23 (0.28*) <0.23 <0.23 <0.48 <br /> Acetone <0.52 (1.2*) <0.52 <0.52 <1.8 <br /> Napthalene <0.93 <0.93 <0.93 <0.93 <0.24 <br /> Methyl ter-butyl ether <0.36 <0.36 <0.36 <0.36 <0.32 <br /> Toluene <0.32 <0.32 <0.32 <0.32 <0.22 <br /> 1,4-Dichlorobenzene <0.46 <0.46 <0.46 <0.46 <0.14 <br /> Tetrachloroethene <0.44 <0.44 <0.44 <0.44 <0.19 <br /> 2-Butanone <0.14 <0.14 <0.14 <0.14 <0.92 <br /> 1 3-Dichloropropane <0.40 <0.40 <0.40 <0.40 <0.12 <br /> Chloromethane <0.18 <0.18 <0.18 <0.18 <0.25 <br /> 1 2 4-Thmethylbenzene <0.18 <0.18 <0.18 <0.18 <0.23 <br /> 1 3 5-Trimethylbenzene <0.28 <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 NR ND NR NR NR ND NR <br /> Organochlorine Pesticides and Polychlorinated Biphenvl's <br /> (EPA Method 3510/8080) <br /> All Compounds NR NR NR ND NR 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 /> LW-1;Printed:7/15/2005 19 of 28 <br />