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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> FOOTHILL SANITARY LANDFILL <br /> Units:mg/I,unless noted <br /> Sample Designation LW-I LW-I LW-I LW-I LW-I LW-I LW-I LW-I LW-I LW-I LW-I LW-I MW-3 MW-3 W-3 i!eMW-3 <br /> Sampling Date 10/9/91 1/10/92 4/3/92 7/1/92 10/2/92 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 <br /> Quarterly Monitoring and Field Parameters <br /> Volatile Organic Compounds(ug/1) <br /> Methylene Chloride <br /> 'I richloroelhcne(1 CE) 0.9 <0.43 <0.4 <0.4 <br /> I,1-Dichloroethene <br /> Chlorulorm <br /> Chlorobenzene <br /> Acetone <br /> Napthalene <br /> Chloride 9.3 NR 10 8 8 9 8 8 8 10 14 9.5 10 8.6 9 9 <br /> Nitrate-Nitrogen Nit I LI 1.1 1.2 1.2 1.2 1.1 1.1 1.1 1.1 1.2 3.6 3.8 3.7 3.5 <br /> Total Dissolved Solids 192 250 210 220 220 240 200 210 220 230 240 182 230 220 179 260 <br /> Sulfate 14.4 15 18 14 14 14 14 14 14 <8 16 15 28[11 4.3 5 6 <br /> pi I(std.units)(field) Nit 7.66 7.69 7.64 6.86 6.47 7.37 6.50 6.40 7.42 7.82 7.68 7.74 7.83 7.80 7.62 <br /> Electrical Conductivity(umhos/cm)(field) NR 289 272 306 329 281 317 315 276 297 300 313 304 275 295 286 <br /> Turbidity(NTU)(field) NR NR NR NR NR NR NR NR Nil NR NR 1.6 100.6 140 136 68 <br /> Tempera tLire("(')(field) Nit Nit NR Nit Nit NR Nit Nit Nit Nit NR 17.3 18.1 19.8 21.5 22.5 <br /> Constituents ol'Concent Parameters <br /> Semivolatile Organic Compounds <br /> (EPA Method 3520/8270) <br /> All Compounds NR Nit NR Nit Nit Nit NR NR NR Nit Nit ND NR NR NR Nit <br /> Organochlorine Pesticides and Polychlorinated Biphenyl's <br /> (EPA Method 3510/8080) <br /> All Compounds NR NR Nit NR Nit NR NR NR NR NR NR ND NR NR NR NR <br /> Chlorinated herbicides <br /> (EPA Method 8150A Modified) <br /> All Compounds NR NR NR NR NR NR NR NR NR NR NR ND NR NR 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\Hist, Revision I: 1/3/01 QA/QC <br />