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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> FOOTHILL SANITARY LANDFILL <br /> Units:mg/l,unless noted 0 <br /> Sample Designation MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 Vr <br /> Sampling Date 7/1/1992 10/2/1992 1/5/1993 4/1/1993 7/1/1993 10/4/1993 1/5/1994 4/5/1994 7/5/1994 11/28/1994 1/16/1995 4/21/1995 7/6/1995 10/11/1995 1/5/1996 <br /> Ouarterly Monitoring and Field Parameters <br /> Volatile Organic Compounds(ug) <br /> Methylene Chloride <br /> Trichloroethene(TCE) <br /> 1,1-Dichloroethene <br /> Chloroform <br /> Chlorobenzene <br /> Acetone <br /> Napthalene <br /> Chloride 6 6 6 6 6 6 8 5 6 6.6 6 5.1 6 6 6 <br /> Nitrate-Nitrogen 3.0 3.0 3.1 3.0 2.9 2.9 1.3 2.0 1.6 2.9 2.9 3.0 2.8 2.6 2.5 <br /> Total Dissolved Solids 200 170 200 180 170 180 190 200 190 162 180 170 130 200 200 <br /> Sulfate <5 <5 <5 <5 <5 <5 <8 <8 <8 1.5 trace 1.1 trace trace <0.7 <br /> pH(std.units)(Feld) 7.25 7.82 7.47 7.64 7.48 7.10 7.52 7.35 7.56 7.76 7.79 7.66 7.55 7.75 8.30 <br /> Electrical Conductivity(umhos/cm)(field) 230 260 232 226 248 198 250 230 234 242 230 196 212 225 201 <br /> Turbidity(NTLI)(field) NR NR NR NR NR NR NR NR NR 4.2 2.2 8 18 10 7 <br /> Temperature(°C)(Held) NR NR NR NR NR NR NR NR NR 15.7 16.7 20.1 22.4 22.0 19.7 <br /> Constituents of Concern Parameters <br /> Semivolatile Organic Compounds <br /> (EPA Method 3520/8270) <br /> All Compounds NR Nit Nit Nit Nit Nit NR NR NR ND 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 NR NR NR ND NR NR NR NR NR <br /> Chlorinated Herbicides <br /> (EPA Method 8150A Modified) <br /> All Compounds NR NR NR NR NR NR NR NR NR ND NR NR NR NR NR <br /> '=Trace Concentration <br /> [I 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:V{LS\0939\00408\Hist, Revision 1:8/31/2000 QA/QC <br />