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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />FOOTHILL SANITARY LANDFILL <br />Units: mg/I, unless noted Page 16 of 22 <br />Sample Designation MW -2 MW -2 MW -2 MW -2 MW -2 MW -2 MW -2 MW -2 MW -2 MW -2 MW -2 MW -2 MW -2 <br />Sampling Date 1/5/1993 4/1/1993 7/1/1993 10/4/1993 1/5/1994 4/5/1994 7/5/1994 11/28/1994 1/16/1995 4/21/1995 7/6/1995 10/11/1995 1/5/1996 <br />Constituents of Concern <br />Metals <br />Aluminum, Dissolved <br />NR <br />NR <br /><0.05 <br />NR <br />NR <br />NR <br /><0.05 <br />trace <br />NR <br />NR <br />NR <br />NR <br />NR <br />Antimony, Dissolved <br />NR <br />NR <br /><0.05 <br />NR <br />NR <br />NR <br /><0.05 <br /><0.017 <br />NR <br />NR <br />NR <br />NR <br />NR <br />Arsenic, Dissolved <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />NR <br /><0.005 <br />trace <br />NR <br />NR <br />NR <br />NR <br />NR <br />Barium, Dissolved <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />0.068 <br />0.064 <br />0.066 <br />NR <br />NR <br />NR <br />Beryllium, Dissolved <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.0005 <br /><0.001 <br /><0.001 <br />NR <br />NR <br />NR <br />Boron, Dissolved <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.05 <br /><0.05 <br />Cadmium, Dissolved <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />NR <br /><0.005 <br /><0.002 <br /><0.002 <br />NR <br />NR <br />NR <br />NR <br />Chromium, Total Dissolved <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />NR <br /><0.01 <br />trace <br />NR <br />NR <br />NR <br />NR <br />NR <br />Chromium Hexavalent <br />NR <br />NR <br /><0.010 <br />NR <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />NR <br />NR <br />NR <br />Cobalt, Dissolved <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Nit <br /><0.003 <br /><0.004 <br /><0.005 <br />NR <br />NR <br />NR <br />Copper, Dissolved <br />NR <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br /><0.01 <br /><0.004 <br /><0.004 <br />NR <br />NR <br />NR <br />NR <br />Iron, Dissolved <br /><0.05 <br />0.1 <br /><0.02 <br /><0.02 <br />0.04 <br /><0.02 <br /><0.05 <br /><0.02 <br />NR <br />NR <br />NR <br />NR <br />NR <br />Lead, Dissolved <br />NR <br />NR <br /><0.002 <br />NR <br />NR <br />NR <br /><0.002 <br /><0.001 <br />NR <br />NR <br />NR <br />NR <br />NR <br />Manganese, Dissolved <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />NR <br /><0.01 <br />trace <br />NR <br />NR <br />NR <br />NR <br />NR <br />Mercury, Dissolved <br />NR <br />NR <br /><0.0005 <br />NR <br />NR <br />NR <br /><0.0005 <br /><0.000I <br />NR <br />NR <br />NR <br />NR <br />NR <br />Nickel, Dissolved <br />NR <br />NR <br /><0.02 <br />NR <br />NR <br />NR <br /><0.04 <br /><0.007 <br />NR <br />NR <br />NR <br />NR <br />NR <br />Selenium, Dissolved <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />NR <br /><0.005 <br /><0.001 <br />NR <br />NR <br />NR <br />NR <br />NR <br />Silver, Dissolved <br />NR <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br /><0.01 <br />trace <br />NR <br />NR <br />NR <br />NR <br />NR <br />Thallium, Dissolved <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />NR <br /><0.005 <br /><0.001 <br /><0.001 <br />NR <br />NR <br />NR <br />NR <br />Tin, Dissolved <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.001 <br /><0.010 <br /><0.012 <br />NR <br />NR <br />NR <br />Vanadium, Dissolved <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />0.018 <br />0.017 <br />0.019 <br />NR <br />NR <br />NR <br />Zinc, Dissolved <br />NR <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br /><0.01 <br />trace <br />NR <br />NR <br />NR <br />NR <br />NR <br />Total Alkalinity <br />NR <br />78 <br />NR <br />76 <br />81 <br />71 <br />76 <br />78 <br />NR <br />NR <br />NR <br />NR <br />NR <br />Alkalinity, Bicarbonate <br />77 <br />78 <br />78 <br />76 <br />81 <br />71 <br />76 <br />78 <br />NR <br />NR <br />NR <br />NR <br />NR <br />Alkalinity, Carbonate <br /><5 <br /><5 <br /><5 <br /><5 <br /><5 <br /><5 <br /><5 <br /><2 <br />NR <br />NR <br />NR <br />NR <br />NR <br />Cyanide <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.003 <br /><0.003 <br /><0.003 <br /><0.003 <br /><0.02 <br />NR <br />Sulfide <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><2 <br />NR <br />NR <br />NR <br />NR <br />NR <br />Total Organic Carbon <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.2 <br />NR <br />NR <br />NR <br />NR <br />NR <br />^ = Trace Concentration <br />ND = Not Detected <br />NR = Not Required <br />N:\XLS\0939\00408\Hist, Revision 1:3/31/2000 QA/QC <br />® r ® = = = r r = M r = = = r M = = = <br />