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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />GROUNDWATER <br />FOOTHILL SANITARY LANDFILL <br />MW -2 <br />Units: mgfi unless noted <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 MW -2 MW -2 MW -2 <br />Sampling Date 4/30/98 7/7/98 10/9/98 1/15/99 4/1/99 7/7/99 10/20/99 3/8/00 5/11/00 7/13/00 10/9/00 1/15/01 4/30/01 8/2/01 10/29/01 2/6/02 4/30/02 <br />Monitorina and Field Parameters <br />--- 3.2- - 3.4 <br />off (std. units) (field) 7.34 7.14 8.27 8.16 7.7 7.78 7.94 7.15 8.3 8.47 6.7 7.98 6.54 7.4 6.19 6.11 e.sU <br /><0 <br />1.1-Dichloroethene <0.72 <0.72 <0.72 <0.72 <0.72 <0.72 <0.04 <0.04 <0.05 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.12 <U.06 <br /><1 <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 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 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 NR NR <br />• = Trace Concentration <br />[1] 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 />MW -2: Printed: 3/4/03 13 of 24 <br />