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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 LW -1 LW -1 LW -1 LW -I LW -1 LW -I LW -1 LW -I LWA LW -1 L -0e -1 <br />Sampling Date 7/7/1999 10/20/1999 3/8/2000 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 1/10/1992 4/3/1992 <br />Ouarterly Monitoring and Field Parameters <br />Volatile Organic Compounds (ug/1) <br />Methylene Chloride <br />11 <br />0.0821 * <br />2.45 <br />Tricbloroethene(TCE) <br /><0.89 <br /><0.06 <br /><0.06 <br />1, 1 -Dichloroethene <br /><0.72 <br /><0.04 <br /><0.04 <br />Chloroform <br /><0.83 <br /><0.06 <br /><0.07 <br />Chlorobenzene <br />2.7 <br /><0.07 <br /><0.07 <br />Chloride <br />6.4 <br />6.55 <br />7.02 <br />Nitrate -Nitrogen <br />3.4 <br />2.62 <br />2.75 <br />Total Dissolved Solids <br />172 <br />165 <br />163 <br />Sulfate <br />5.9 <br />3.04 <br />3.68 <br />pH (std. units) (field) <br />7.78 <br />7.94 <br />7.15 <br />Electrical Conductivity (umhos/cm) (field) <br />196 <br />196.9 <br />197 <br />Turbidity (NTU) (field) <br />1.95 <br />0.46 <br />1.2 <br />Temperature (°C) (field) <br />22.2 <br />20.6 <br />18 <br />Constituents of Concern Parameters <br />Semivolatile Organic Compounds <br />(EPA Method 3520/8270) <br />All Compounds NR ND NR <br />Organochlorine Pesticides and Polychlorinated Biphenyl's <br />(EPA Method 3510/8080) <br />All Compounds NR ND NR <br />Chlorinated Herbicides <br />(EPA Method 8150A Modified) <br />9 <br />11 <br />10.3 <br />10.2 <br />9.6 <br />8.3 <br />8.9 <br />9 <br />9.5 <br />9.3 <br />NR <br />10 <br />0.34 [1] <br />1.2 <br />1.3 <br />1.3 <br />1.2 <br />1.2 <br />NR <br />NR <br />NR <br />NR <br />1 <br />1.1 <br />175 <br />155 <br />150 <br />196 <br />106 <br />194 <br />179 <br />198 <br />164 <br />192 <br />250 <br />210 <br />13 <br />14 <br />14.8 <br />14.6 <br />14.5 <br />13.9 <br />11.5 <br />14.6 <br />14.3 <br />14.4 <br />15 <br />18 <br />8.00 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />7.66 <br />7.69 <br />279 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />289 <br />272 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR NR NR NR NR NR NR NR NR NR NR NR <br />NR NR NR NR NR NR NR NR NR NR NR NR <br />All Compounds NR ND 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 />NR NR NR NR NR NR NR NR NR NR NR <br />N:\XLS\0939\00408\Hist, Revision l: 3/31/2000 QA/QC <br />