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HISTORICAL SUMMARYALYTICAL RESULTS <br />GROUN TER <br />FOOTHILL SANITARY LANDFILL <br />MW -2 <br />Units: mull, unless noted <br />amp a Designation MW-2--MVV--f—­MW-2 -2 -2 -2 - - - -2 - - - - MW -2 MW -2 <br />Sampling <br />- <br />Sampling Date 1/5/94 4/5/94 7/5/94 11/28/94 1/16/95 4/21/95 1/22/04 10/11/95 1/5/96 4/2/96 7/9/96 10/2/96 1/16/97 4/10/97 7/10/97 10/3/97 3/11/98 <br />Constituents of Concern Parameters <br />Chlorinated Herbicides <br />(EPA Method 8150A Modified) <br />All compounds NR NR NR ND NR NR NR NR NR NR NR NR NR NR NR NR NR <br />Chromium, Total Dissolved NR NR <0.01 trace NR NR NR NR NR NR NR NR NR NR NR NR NR <br />hromium Hexavalent NR NR NR <0.005 NR NR NR NR NR NR NR NR NR NR NR NR NR <br />Cobalt, Dissolved <br />NR <br />NR <br />NR <br /><0.003 <br /><0.004 <br /><0.005 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Copper, DissoFyed <br />NR <br />NR <br /><0.01 <br /><0.004 <br /><0.004 <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 />Iron, Dissolved <br />0.04 <br /><0.02 <br /><0.05 <br /><0.02 <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 />Lead, Dissolved <br />NR <br />NR <br /><0.002 <br /><0.001 <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 />Manganese, Dissolved <br />NR <br />NR <br /><0.01 <br />trace <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 />Mercury, Dissolved <br />NR <br />NR <br /><0.0005 <br /><0.0001 <br />NR <br />R <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Nickel, Dissolved <br />NR <br />NR <br /><0.04 <br /><0.007 <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 />Selenium, Dissolved <br />NR <br />NR <br /><0.005 <br /><0.001 <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 />Silver, Dissolved <br />NR <br />NR <br /><0.01 <br />trace <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 />Thallium, Dissolved <br />NR <br />NR <br /><0.005 <br /><0.001 <br /><0.001 <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 />Zinc, Dissolved _ NR NR <0.01 trace NR NR NR NR NR NR NR NR NR NR NR NR NR <br />Total Organic Carbon <0.5 <0.5 <0.5 <0.2 NR NR NR 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 />(1) Parameter also detected in one or more quality control blanks <br />ND = Not Detected <br />NM = Not Measured <br />NR = Not Required <br />MW -2 (abandoned); Printed: 08/11/2005 24 of 32 <br />