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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />GROUNDWATER <br />FOOTHILL SANITARY LANDFILL <br />Units: mg/l, unless noted <br />Sample Designation <br />LW -1 <br />LW -1 <br />LW -1 <br />LW -1 <br />LW -1 <br />LW -1 <br />LW -1 <br />LW -1 <br />LW -1 <br />LW -1 <br />LW -1 <br />LW -1 <br />LW -1 <br />LW -1 <br />LW -1 <br />LW -1 <br />LW -1 <br />Sampling Date <br />11/28/94 <br />5/30/03 <br />8/14/03 <br />1/22/04 <br />7P2 1/04 <br />2/2/05 <br />7r-)7/05 <br />3/2-8/06 <br />7r-7/06 <br />1/31/07 <br />7/23/07 <br />2/5/08 <br />7/30/08 <br />1/15/09 <br />8/17/09 <br />10/7/09 <br />2/4/10 <br />Constituents ofConcem Parameters <br />Chlorinated Herbicides <br />(EPA Method 81 50A Modified) <br />All Compounds <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />ND <br />NA <br />NA <br />Metals <br />Aluminum, Dissolved <br />NA <br />NA <br />NA <br />NA <br />0.036* <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br /><0.038 <br />NA <br />NA <br />Antimony, Dissolved <br /><0.02 <br />NA <br />NA <br />NA <br />0.000020* <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br /><0.034 <br />NA <br />NA <br />Arsenic, Dissolved <br />NA <br />NA <br />NA <br />NA <br />0.0011 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />0.0017* <br />NA <br />NA <br />Barium, Dissolved <br />0.11 <br />NA <br />NA <br />NA <br />0.11 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />0.12 <br />NA <br />NA <br />Beryllium, Dissolved <br /><0.0005 <br />NA <br />NA <br />NA <br />----0.0021 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br /><0.001 I <br />NA <br />NA <br />Boron, Dissolved <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Cadmium, Dissolved <br /><0.002 <br />NA <br />NA <br />NA <br /><0.0000 18 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br /><0.0006 <br />NA <br />NA <br />Chromium, Total Dissolved <br />NA <br />NA <br />NA <br />NA <br />0.0046* <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />0.0016* <br />NA <br />NA <br />Chromium Hexavalent <br />0.027 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Cobalt, Dissolved <br /><0.003 <br />NA <br />NA <br />NA <br />0.0030* <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br /><0,0037 <br />NA <br />NA <br />Copper, Dissolved <br />NA <br />NA <br />NA <br />NA <br />0.0026* <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br /><0,00 15 <br />NA <br />NA <br />Iron, Dissolved <br />0.027 <br />NA <br />NA <br />NA <br />0.0056* <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br /><0.0093 <br />NA <br />NA <br />Lead, Dissolved <br /><0.00 I <br />NA <br />NA <br />NA <br />0.000071 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br /><0.000054 <br />NA <br />NA <br />Manganese, Dissolved <br />0.007 <br />NA <br />NA <br />NA <br />0.0 01 7 * <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br /><0.000 11 <br />NA <br />NA <br />Mercury, Dissolved <br /><0.0001 <br />NA <br />NA <br />NA <br /><0.000032 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br /><0.0000 16 <br />NA <br />NA <br />Nickel, Dissolved <br /><0.007 <br />NA <br />NA <br />NA <br />0.00054* <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />0,0011* <br />NA <br />NA <br />Selenium, Dissolved <br /><0.001 <br />NA <br />NA <br />NA <br />0.00043* <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br /><0.00038 <br />NA <br />NA <br />Silver, Dissolved <br />NA <br />NA <br />NA <br />NA <br /><0.01 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br /><0.00 18 <br />NA <br />NA <br />Thallium, Dissolved <br /><0.001 <br />NA <br />NA <br />NA <br /><O.OGOO 16 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br /><0.021 <br />NA <br />NA <br />Tin, Dissolved <br /><0.01 <br />NA <br />NA <br />NA <br /><0.033 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br /><0.007 <br />NA <br />NA <br />Vanadium, Dissolved <br />0.011 <br />NA <br />NA <br />NA <br />0.012* <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />0.0097* <br />NA <br />NA <br />Zinc, Dissolved <br />0.012 <br />NA <br />NA <br />NA <br />0.0058* <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br /><0.0023 <br />NA <br />NA <br />Alkalinity as CaCO3 <br />104 <br />100 <br />100 <br />110 <br />100 <br />110 <br />110 <br />105 <br />104 <br />110 <br />NA <br />NA <br />100 <br />110 <br />NA <br />NA <br />100 <br />Carbonate Alkalinity as CaCO3 <br /><2 <br /><5.0 <br /><5.0 <br /><5.0 <br /><5.0 <br /><2.2 <br /><5.0 <br /><2 <br /><3 <br />NA <br />NA <br />NA <br /><2 <br /><2 <br /><2.5 <br />NA <br /><2.5 <br />Bicarbonate Alkalinity as HCO3 <br />104 <br />100 <br />100 <br />110 <br />100 <br />110 <br />110 <br />105 <br />104 <br />130 <br />130 <br />140 <br />130 <br />140 <br />130 <br />NA <br />130 <br />Hydroxide Alkalinity as CaCO3 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br /><2 <br /><2 <br />NA <br />NA <br />NA <br />Cyanide <br /><0.003 <br />NA <br />NA <br />NA <br /><0.0 17 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br /><0.0028 <br />NA <br />NA <br />Sulfide <br /><2 <br />NA <br />NA <br />NA <br />0.044* <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br /><0.05 <br />NA <br />NA <br />Total Organic Carbon <br /><0.2 <br />NA <br />NA <br />NA <br />1.8 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />(0.24) <br />NA <br />NA <br />= Trace Concentration <br />11 This analytical result appears to be anomalous and therefore was not used in statistical evaluation <br />procedures. <br />{1) Parameter also detected in one or more quality control blanks <br />NA = Not Available <br />0 <br />