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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> FOOTHILL SANITARY LANDFILL <br /> Units:mg/1,unless noted <br /> Sample Designation MW-3 MW-3 Page 10 of 20 <br /> Sampling Date 10/9/00 1/15/01 <br /> Ouarterly Monitoring and Field Parameters <br /> Volatile Organic Compounds(ug/1) <br /> Methylene Chloride <0.06 <0.06 <br /> Trichloroethene(TCE) 0.323' 0.717 <br /> 1,1-Dicldoroethene 0.0688• 0.316' <br /> Chloroform <0.07 <0.07 <br /> Chlorobenzene <0.07 <0.07 <br /> Acetone <1.79 <1.79 <br /> Napthalene <0.1 <0.1 <br /> Chloride 9.96 12 <br /> Nitrate-Nitrogen 3.5 3.64 <br /> Total Dissolved Solids 196 191 <br /> Sulfate 7.19 7.66 <br /> pH(std.units)(field) 7.41 7.01 <br /> Electrical Conductivity(umhos/cm)(field) 272 316 <br /> Turbidity(NTU)(field) 0.21 2.35 <br /> Temperature(°C)(field) 20 23.7 <br /> Constituents of Concern Parameters <br /> Semivolatile Organic Compounds <br /> (EPA Method 3520/8270) <br /> All Compounds NR NR <br /> Organochlorine Pesticides and Polychlorinated Biphenyl's <br /> (EPA Method 3510/8080) <br /> All Compounds NR NR <br /> Chlorinated Herbicides <br /> (EPA Method 8150A Modified) <br /> All Compounds NR NR <br /> "=Trace Concentration <br /> [I)This analytical result appears to be anomalous and therefore was not used in statistical evaluation procedures. <br /> ND=Not Detected <br /> NR=Not Required <br /> N:\XLS\0939\00408\1-fist, Revision 1:4/4/01 QA/QC <br />