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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> FOOTHILL SANITARY LANDFILL <br /> Units:m 1,unless noted <br /> >UIn1)IC I)C8lglmallnll I.W.1 LW-1 LW-1 LW-I I..W-I LW-1 LW-1 MW-3 MW-3 MW-3 MW.3 MW.3 MW-3 MW.3 MW-3 Page Sof 20 <br /> Sampling Date 1/5/93 4/1/93 7/1/93 10/4/93 1/5/94 7/5/94 11/28/94 1/16/95 4/20/95 7/6/95 10/11/95 1/4/96 4/2/96 7/9/96 10/2/96 <br /> Ouarterly Monitorink and Field Parameters <br /> Volatile Organic Compounds(ug/1) <br /> Methylene Chloride <br /> Trichloroethene(TCE) 0.9 <0.43 <0.4 <0.4 trace <0.4 <0.4 trace <br /> 1,1-Dichloroethene <0.4 <0.4 <br /> Chloroform <0.83 <0.83 <br /> Chlorobenzene <br /> Acetone <br /> Napthalene <br /> Chloride 9 8 8 8 10 14 9.5 10 8.6 9 9 9 9 9 9 <br /> Nitrate-Nitrogen 1.2 1.2 1.1 1.1 Ll 1.1 1.2 3.6 3.8 3.7 3.5 3.3 3.9 r1.3 4.1 <br /> Total Dissolved Solids 240 200 210 220 230 240 182 230 220 179 260 250 250 230 230 <br /> Sulfate 14 14 14 14 <8 16 15 28[I) 4.3 5 6 6 5 6 6 <br /> pH(std.units)(field) 6.47 7.37 6.50 6.40 7.42 7.82 7.68 7.74 7.83 7.80 7.62 7.81 7.48 7.49 7.34 <br /> Electrical Conductivity(umbos/cm)(field) 281 317 315 276 297 300 313 304 275 295 286 294 277 289 275 <br /> Turbidity(NTU)(field) NR NR NR NR NR NR 1.6 100.6 140 136 68 42 120.3 58.0 65.1 <br /> Temperature(°C)(field) NR NR NR NR NR NR 17.3 18.1 19.8 21.5 22.5 18.4 20.8 22.5 21.3 <br /> Constituents of Concern Parameters <br /> Semivolatile Organic Compounds <br /> (EPA Method 3520/8270) <br /> All Compounds NR NR NR NR NR NR ND 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 NR NR NR ND NR NR NR NR NR NR NR NR <br /> Chlorinated Herbicides <br /> (EPA Method 8150A Modified) <br /> All Compounds NR NR NR NR NR NR ND NR NR NR NR NR NR NR NR <br /> 'f face Cuncenhadou <br /> (I]This anulylicul 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\Hist, Revision 1:4/4/01 QA/QC <br />