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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />GROUNDWATER <br />FOOTHILL SANITARY LANDFILL <br />MW -3 <br />Units: mgn, unless noted <br />Sample Designation MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 <br />Sampling Date 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 8/1/02 10/14/02 <br />Monitorina and Field Parameters <br />General Water Quality Parameters <br />Chloride 13 7.1 9.61 9.7 9.73 9.6 9.96 12 9.76 9 11 12 9.3 10 11 <br />7. <br />07 <br /><1.79 <1.79 <1.79 <1 <br />220 190 200 190 210 <br />Toluene <0.07 <0.07 <0.07 <0.16 <0.07 <0.07 <0.2 <br />1,4 -Dichlorobenzene 0.18* <0.11 <0.23 <0.11 <0.11 0.8 <br />Tetrachloroethene 0.086* <0.08 <0.22 <0.08 <0.08 <0.3 <br />Constituents of Concern Parameters <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 -3; Printed: 3/4/03 19 of 24 <br />