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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />GROUNDWATER <br />FOOTHILL SANITARY LANDFILL <br />Units: mg/l, unless noted <br />Sample Designation LW -1 LWA LW -1 LW -1 LW -1 LW -1 LW -1 LW -1 LW -1 LW -1 LW -1 <br />Sampling Date 11/28/94 5/30/03 8/14/03 1/22/04 7/21/04 2/2/05 7/27/05 3/28/06 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 ND NR NR NR NO NR NR NR NR NR NR <br />Metals <br />100 <br />100 <br />110 <br />100 <br />110 <br />110 <br />105 <br />104 <br />110 <br />NM <br />Aluminum, Dissolved <br />trace <br />NR <br />NR <br />NR 0.036" <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Antimony, Dissolved <br /><0.02 <br />NR <br />NR <br />NR 0.000020• <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Arsenic, Dissolved <br />trace <br />NR <br />NR <br />NR 0.0011 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Barium, Dissolved <br />0.11 <br />NR <br />NR <br />NR 0.11 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Beryllium, Dissolved <br /><0.0005 <br />NR <br />NR <br />NR 0.0021" <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Boron, Dissolved <br />NR <br />NR <br />NR <br />NR NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Cadmium, Dissolved <br /><0.002 <br />NR <br />NR <br />NR <0.000018 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Chromium, Total Dissolved <br />trace <br />NR <br />NR <br />NR 0.0046° <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Chromium Hexavalent <br />0.027 <br />NR <br />NR <br />NR NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Cobalt, Dissolved <br /><0.003 <br />NR <br />NR <br />NR 0.0030" <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Copper, Dissolved <br />trace <br />NR <br />NR <br />NR 0.0026" <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />_Iron, Dissolved <br />0.027 <br />NR <br />NR <br />NR 0.0056" <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Lead, Dissolved <br /><0.001 <br />NR <br />NR <br />NR 0.000071' <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Manganese, Dissolved <br />0.007 <br />NR <br />NR <br />NR 0.0017• <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Mercury, Dissolved <br /><0.0001 <br />NR <br />NR <br />NR <0.000032 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Nickel, Dissolved <br /><0.007 <br />NR <br />NR <br />NR 0.00054" <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Selenium, Dissolved <br /><0.001 <br />NR <br />NR <br />NR 0.00043' <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Silver, Dissolved <br />trace <br />NR <br />NR <br />NR <0.01 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Thallium, Dissolved <br /><0.001 <br />NR <br />NR <br />NR <0.000016 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Tin, Dissolved <br /><0.01 <br />NR <br />NR <br />NR <0.033 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Vanadium, Dissolved <br />0.011 <br />NR <br />NR <br />NR 0.012" <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Zinc, Dissolved <br />0.012 <br />NR <br />NR <br />NR 0.0058• <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Total Alkalinity 104 <br />100 <br />100 <br />110 <br />100 <br />110 <br />110 <br />105 <br />104 <br />110 <br />NM <br />Alkalinity, Bicarbonate 104 <br />100 <br />100 <br />110 <br />100 <br />110 <br />110 <br />105 <br />104 <br />130 <br />130 <br />Alkalinity, Carbonate <2 <br /><5.0 <br /><5.0 <br /><5.0 <br /><5.0 <br /><2.2 <br /><5.0 <br /><2 <br /><3 <br />NR <br />NO <br />Cyanide <0.003 <br />NR <br />NR <br />NR <br /><0.017 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Sulfide <2 <br />NR <br />NR <br />NR <br />0.044" <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Total Organic Carbon <0.2 <br />NR <br />NR <br />NR <br />1.8 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />° = Trace Concentration <br />[1 ] This analytical result appears to be anomalous and therefore was not used <br />in statistical <br />evaluation <br />procedures. <br />(1) Parameter also detected in one or more quality control blanks <br />NO = Not Detected <br />NM = Not Measured <br />NR = Not Required <br />n:\consulting\data\shared\projects\xls\qmr\79\791289\FH012208g1 (2)xls <br />ass ar M m " <br />