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HISTORICAL SUMMARY NALYTICAL RESULTS <br /> GRO TER <br /> FOOTHILL SAMOMY LANDFILL <br /> MW-1 <br /> Units:mg/l,unless noted <br /> Sample Designation MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 <br /> Sampling Date 1/5/94 4/5/94 7/5/94 11/28/94 4/21/95 7/6/95 1/22/04 1/5/96 4/2/96 7/9/96 -10/2/96 1/16/97 4/10/97 7/10/97 10/3/97 3/11/98 4/30/98 <br /> Monitoring and Field Parameters <br /> General Water Quality Parameters <br /> _Temperature(°C)(field) NR NR NR 13.7 20.2 22.5 21.5 18.6 21.3 22.3 21.8 15.2 24.4 21.5 22 19.5 20.6 <br /> Chloride 7 5 7 6.3 4.9 5 6 6 5 6 6 4.7 4.7 4.7 6.1 8 6.8 <br /> Nitrate-Nitrogen 13 2 14 2A 2.6 2.4 2.3 2.1 2.5 2.3 2.9 2.1 2.4 2.3 2.4 3.4 2.8 <br /> Total Dissolved Solids 210 220 220 186 200 160 240 230 230 250 210 225 187 194 216 196 186 <br /> Sulfate <8 <8 10 6.5 4.9 6 7 6 6 6 7 4.9 5.1 4.8 6 6.5 6.6 <br /> pH(std units)(field) 7.80 7.62 7.89 8.48 7.89 7.81 7.86 7.97 7,35 7.65' 7.25 9.28 7.65 7.83 7.93 7.97 8.03 <br /> Electrical Conductivity(umhos/cm) 305 294 281 287 245 263 269 246 236 257 245 610 153 173 278 224 245 <br /> Turbidity(NTU)(field) NR NR NR 36.9 18 34 14 11 20.8 51.9 16.9 2.27 3.47 2.69 56.5 1 29.6 <br /> Calcium <br /> Potassium <br /> Magnesium <br /> Sodium <br /> Volatile Organic Comgounds(ug/1) <0.89 <0.89 <0.89 <br /> Trichloroethene(TCE) <0.72 <0.72 <0.72 <br /> 1,1-Dichloroethene <br /> Chloroform <0.83 <0.83 <0.83 <br /> Benzene <br /> m/p-Xylene <br /> Chlorobenzene <br /> Methylene Chloride <br /> Acetone <br /> Napthalene <br /> Methyl ter-butyl ether <br /> Toluene <br /> 1,4-Dichlorobenzene <br /> Tetrachloroethene <br /> 2-Butanone <br /> 1 3-Dichloropropane <br /> Chloromethane <br /> 1 2 4-Trimethylbenzene <br /> 1 3 5-Trimethylbenzene <br /> Constituents of Concern Parameters - <br /> Semivolatile Organic Compounds(EPA Method 3520/8270) <br /> All Compounds NR NR NR ND NR NR NR NR NR NR NR NR NR NR NR NR NR <br /> Organochlorine Pesticides and Polychlorinated Biphenyl's <br /> (EPA Method 3510/8080) <br /> All Compounds NR NR NR ND NR NR NR NR NR NR NR NR NR 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 /> ND=Not Detected <br /> NM=Not Measured <br /> NR=Not Required <br /> MW-1;Printed:7/15/2005 3 of 28 <br />