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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> FOOTHILL SANITARY LANDFILL <br /> Units:mg/I,unless noted <br /> Sample Designation MW-2 MW-2 MW-2 MW-2 MW-2 LW-1 LW-I LW-1 LW-1 LW-1 LW-I LW-1 LW-1 L -I W-I <br /> Sampling Date 7/7/1999 10/20/1999 3/8/2000 5/11/2000 7/13/2000 7/10/1989 10/20/1989 1/17/1990 4/4/1990 7/12/1990 10/2/1990 1/7/1991 4/2/1991 7/19/1991 10/9/1991 <br /> Quarterly Monitoring and Field Parameters <br /> Volatile Organic Compounds(ug/1) <br /> Methylene Chloride 0.0821* 2.45 <0.03 <0.06 <br /> Trichloroethene(TCE) <0.89 <0.06 <0.06 <0.06 <0.06 <br /> 1,1-Dichloroethene <0.72 <0.04 <0.04 <0.05 <0.06 <br /> Chloroform <0.83 <0.06 <0.07 <0.06 <0.07 <br /> Chlorobenzene 2.7 <0.07 <0.07 <0.07 <0.07 <br /> Acetone ND ND ND ND 2.09* <br /> Napthalene ND ND ND ND 0.11* <br /> Chloride 6.4 6.55 7.02 7.04 6.98 9 11 10.3 10.2 9.6 8.3 8.9 9 9.5 9.3 <br /> Nitrate-Nitrogen 3.4 2.62 2.75 2.82 2.8 0.34(11 1.2 1.3 1.3 1.2 1.2 NR NR NR NR <br /> Total Dissolved Solids 172 165 163 169 162 175 155 150 196 106 194 179 198 164 192 <br /> Sulfate 5.9 3.04 3.68 2.67 3.9 13 14 14.8 14.6 14.5 13.9 11.5 14.6 14.3 14.4 <br /> pH(std.units)(field) 7.78 7.94 7.15 8.3 8.47 8.00 NR NR NR NR NR NR NR NR NR <br /> Electrical Conductivity(umhos/cm)(field) 196 196.9 197 188 202 279 NR NR NR NR NR NR NR NR NR <br /> Turbidity(NTU)(field) 1.95 0.46 1.2 2 0.67 NR NR NR NR NR NR NR NR NR NR <br /> Temperature(°C)(field) 22.2 20.6 18 19.5 20.5 NR NR NR NR NR NR NR NR NR NR <br /> Constituents ofConcem Parameters <br /> Semivolatile Organic Compounds <br /> (EPA Method 3520/8270) <br /> All Compounds 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 ND NR NR NR NR NR NR NR NR NR NR NR NR NR <br /> Chlorinated Herbicides <br /> (EPA Method 8150A Modified) <br /> All Compounds NR ND NR NR NR NR NR NR NR NR NR NR NR NR NR <br /> *=Trace Concentration <br /> (ij 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:,"{I N101119UI11,1010hill, INylddnll I,H/II/.10110 0A/0C <br />