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HISTORICAL SURIgW OF ANALYTICAL RESULTS <br /> NDWATER <br /> FOOTHIL ANITARY LANDFILL <br /> MW-1 <br /> Units:mgA unless noted <br /> Sample Designation MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 <br /> Sampling Date 10/14/02 1/29/03 5/30/03 8/13/03 1/22/04 7/22/04 2/2/05 <br /> Monitoring and Field Parameters <br /> General Water Quality Parameters -- <br /> Temperature(°C)(field) 20.4 16 23.8 21.6 16.5 21.1 18.1 <br /> Chloride 9.2 6.7 NM 6.4 9.5 6.7 5 <br /> Nitrate-Nitrogen 3.2 3.2 NM 3.3 1.4 3.1 2.4 <br /> Total Dissolved Solids 360 180 NM 170 180 190 130 <br /> Sulfate 5.8 6.5 NM 6.3 15 5.4 4 <br /> pH(std units)(field) 6.74 6.7 7.81 7.42 7.04 7.11 7.14 <br /> Electrical Conductivity(umhos/cm) 250 379 234 208 231 289 246 <br /> Turbidity(NTU)(field) 6.9 2.9 0.7 12.6 13,7 6.74 14.9 <br /> Calcium NM 19 19 18 18 15.9 <br /> Potassium NM 3.3 <0.92 2 2.9 2.6 <br /> Magnesium NM 9.8 9.7 9.8 9.6 7.8 <br /> Sodium NM 11 11 11 11 8.5 <br /> Volatile Organic Compounds(up/1) <br /> Trichloroethene(TCE) <0.2 <0.36 NM <0.36 <0.36 <0,36 <0.13 <br /> 1,1-Dichloroethene <0.2 <0.24 NM <024 <0.24 <0.24 <0.39 <br /> Chloroform <0.3 <0.37 NM <0.37 <0.37 <0.37 <0.20 <br /> Benzene <0.20 <0.28 NM <028 <0.28 <0.28 <0.17 <br /> m/p-Xylene <0.20 <0.38 NM <0.38 <0.38 <0.38 NR <br /> Chlorobenzene <0.2 <0.32 NM <0.32 <0.32 <0.32 <0.16 <br /> Methylene Chloride <0.3 <0.23 NM {0 24*) <0.23 <0.23 <0.48 <br /> Acetone <2.0 (2.51 NM (1.0*) <0.52 <0.52 <1.8 <br /> Naphthalene <0.3 <0.93 NM <0.93 <0.93 <0.93 <0.24 <br /> Methyl tert-butyl ether 5.3 <0.36 NM <0.36 <0.36 <0.36 <0.32 <br /> Toluene <0.2 <0.32 NM <0.32 <0.32 <0.32 <0.22 <br /> 1,4-Dichlorobenzene <0.2 <0.46 NM <0.46 <0.46 <0.46 <0.14 <br /> Tetrachloroethene <0.3 <0.44 NM <0.44 <0.44 <0.44 <0.19 <br /> 2-Butanone <2.0 <0.14 NM <0.14 <0.14 <0.14 <0.92 <br /> 1 3-Dichloropropane <0.2 <0.40 NM <0.40 <0.40 <0.40 <0.12 <br /> Chloromethane <0.3 <0.18 NM {019*) 0.18 0.18 <0.25 <br /> 1,2,4-Trimethylbenzene NM <0.18 <0.18 <0.18 <0.23 <br /> 1 3 5-Trimethylbenzene NM <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 NR NR ND NR <br /> Organochlorine Pesticides and Polychlorinated Biphenvl's <br /> (EPA Method 3510/8080) <br /> All Compounds NR NR 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 /> MW-1;Printed:7/15/2005 7 of 28 <br />