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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />GROUNDWATER <br />FOOTHILL SANITARY LANDFILL <br />Units: mg/I, unless noted <br />Sample Designation MW -2R MW -211 MW -2R MW -2R MW -2R MW -2R MW -2R MW -2R MW -211 <br />Sampling Date 8/13/03 1/21/04 7/21/04 2/2/05 7/27/05 5/15/06 7/27/06 1/31/07 7/23/07 <br />Constituents of Concern Parameters <br />Chlorinated Herbicides <br />(EPA Method 8150A Modified) <br />All Compounds NR NR ND NR NR NR NR NR NR <br />Metals in <br />84 <br />86 <br />80 <br />85 <br />83 <br />83 <br />85 <br />81 <br />Aluminum, Dissolved <br />NR <br />NR 0.043* <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Antimony, Dissolved <br />NR <br />NR 0.000021* <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Arsenic, Dissolved <br />NR <br />NR 0.0018 <br />NR <br />NR <br />NR <br />NR <br />NR <br />_ <br />NR <br />Barium, Dissolved <br />NR <br />NR 0.032* <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Beryllium, Dissolved <br />NR <br />NR 0.0023" <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Boron, Dissolved <br />NR <br />NR NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Cadmium, Dissolved <br />NR <br />NR <0.0000 IS <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Chromium, Total Dissolved <br />NR <br />NR 0.0044* <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Chromium Hexavalent <br />NR <br />NR NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Cobalt, Dissolved <br />NR <br />NR <0.0025 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Copper, Dissolved <br />NR <br />NR 0.0019* <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Iron, Dissolved <br />NR <br />NR <0.0038 <br />NR <br />NR <br />NR <br />NR <br />NR <br />_ <br />NR <br />Lead, Dissolved <br />NR <br />NR <0.000023 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Manganese, Dissolved <br />NR <br />NR 0.00060* <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Mercury, Dissolved <br />NR <br />NR <0.000032 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Nickel, Dissolved <br />NR <br />NR 0.00042* <br />NR <br />NR <br />NR <br />NR <br />NR <br />_ <br />NR <br />Selenium, Dissolved <br />NR <br />NR <0.00030 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Silver, Dissolved <br />NR <br />NR <0.01 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Thallium, Dissolved <br />NR <br />NR <0.000016 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Tin, Dissolved <br />NR <br />NR <0.033 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Vanadium, Dissolved <br />NR <br />NR 0.019* <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Zinc, Dissolved <br />NR <br />NR <0.0005 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Total Alkalinity <br />84 <br />86 <br />80 <br />85 <br />83 <br />83 <br />85 <br />81 <br />NM <br />Alkalinity, Bicarbonate <br />84 <br />86 <br />80 <br />85 <br />83 <br />83 <br />85 <br />99 <br />97 <br />Alkalinity, Carbonate <br /><5.0 <br /><5.0 <br /><5.0 <br /><2.2 <br /><5.0 <br /><2 <br /><3 <br />NR <br />ND <br />Cyanide <br />NR <br />NR <br /><0.017 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Sulfide <br />NR <br />NR <br />0.036* <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Total Organic Carbon <br />NR <br />NR <br />2.7 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />* = Trace Concentration <br />[I ] This analytical result appears to be anomalous and therefore was not used in statistical evaluation procedures. <br />( I } Parameter also detected in one or more quality control blanks <br />ND = Not Detected <br />NM = Not Measured <br />NR = Not Required <br />n:\consulting\data\shared\projectsbds\qmr\79\791289\FH012208g1 (2).xls <br />