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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />FOOTHILL SANITARY LANDFILL <br />Units: mg/l, unless noted <br />MW -3 <br />MW -3 <br />MW -3 <br />MW -3 Page 20 of 22 <br />Sample Designation LW -1 LW -1 LW -I LW -1 LW -1 LW -1 LW -1 LW -1 <br />Sampling Date <br />10/2/1992 <br />1/5/1993 <br />4/1/1993 <br />7/1/1993 <br />10/4/1993 <br />1/5/1994 <br />7/5/1994 <br />11/28/1994 <br />1/16/1995 <br />4/20/1995 <br />7/6/1995 <br />10/11/1995 <br />Constituents of Concern <br />Metals <br />Aluminum, Dissolved <br />NR <br />NR <br />NR <br /><0.05 <br />NR <br />NR <br /><0.05 <br />trace <br />NR <br />NR <br />0.061 <br /><0.05 <br />Antimony, Dissolved <br />NR <br />NR <br />NR <br /><0.05 <br />NR <br />NR <br /><0.05 <br /><0.02 <br />NR <br />NR <br /><0.02 <br /><0.05 <br />Arsenic, Dissolved <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br /><0.005 <br />trace <br />NR <br />NR <br /><0.001 <br /><0.002 <br />Barium, Dissolved <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />0.11 <br />0.027 <br />0.036 <br />0.066 <br />0.06 <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 /><0.002 <br />Boron, Dissolved <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />trace <br /><0.05 <br />Cadmium, Dissolved <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br /><0.005 <br /><0.002 <br /><0.002 <br />NR <br /><0.003 <br /><0.003 <br />Chromium, Total Dissolved <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br /><0.01 <br />trace <br />NR <br />NR <br /><0.004 <br /><0.005 <br />Chromium Hexavalent <br />NR <br />NR <br />NR <br /><0.010 <br />NR <br />NR <br />NR <br />0.027 <br />NR <br />NR <br />NR <br /><0.0023 <br />Cobalt, Dissolved <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.003 <br /><0.004 <br /><0.005 <br /><0.005 <br /><0.01 <br />Copper, Dissolved <br />NR <br />NR <br />NR <br /><0.01 <br />NR <br />NR <br /><0.01 <br />trace <br /><0.004 <br />NR <br />trace <br /><0.01 <br />Iron, Dissolved <br /><0.05 <br /><0.05 <br /><0.05 <br /><0.02 <br /><0.02 <br /><0.02 <br /><0.05 <br />0.027 <br />NR <br />NR <br />trace <br /><0.02 <br />Lead, Dissolved <br />NR <br />NR <br />NR <br />0.003 <br />NR <br />NR <br /><0.002 <br /><0.001 <br />NR <br />NR <br /><0.001 <br />trace <br />Manganese, Dissolved <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br /><0.01 <br />0.007 <br />NR <br />NR <br />0.083 <br /><0.005 <br />Mercury, Dissolved <br />NR <br />NR <br />NR <br /><0.0005 <br />NR <br />NR <br /><0.0005 <br /><0.000I <br />NR <br />NR <br /><0.0001 <br /><0.0005 <br />Nickel, Dissolved <br />NR <br />NR <br />NR <br /><0.02 <br />NR <br />NR <br /><0.04 <br /><0.007 <br />NR <br />NR <br /><0.019 <br /><0.02 <br />Selenium, Dissolved <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br /><0.005 <br /><0.001 <br />NR <br />NR <br /><0.002 <br /><0.003 <br />Silver, Dissolved <br />NR <br />NR <br />NR <br /><0.01 <br />NR <br />NR <br /><0.01 <br />trace <br />NR <br />NR <br /><0.002 <br /><0.005 <br />Thallium, Dissolved <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br /><0.005 <br /><0.001 <br /><0.001 <br />NR <br /><0.001 <br /><0.003 <br />Tin, Dissolved <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.01 <br /><0.010 <br /><0.012 <br /><0.012 <br /><0.I <br />Vanadium, Dissolved <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />0.011 <br />0.015 <br />0.017 <br />0.018 <br />0.02 <br />Zinc, Dissolved <br />NR <br />NR <br />NR <br />0.01 <br />NR <br />NR <br /><0.01 <br />0.012 <br />NR <br />NR <br />trace <br /><0.01 <br />Total Alkalinity <br />NR <br />NR <br />100 <br />NR <br />100 <br />100 <br />100 <br />104 <br />NR <br />NR <br />100 <br />100 <br />Alkalinity, Bicarbonate <br />95 <br />99 <br />100 <br />100 <br />100 <br />100 <br />100 <br />104 <br />NR <br />NR <br />100 <br />100 <br />Alkalinity, Carbonate <br /><5 <br /><5 <br /><5 <br /><5 <br /><5 <br /><5 <br /><5 <br /><2 <br />NR <br />NR <br /><4 <br /><4 <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 />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 /><2 <br /><0.6 <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 />trace <br />trace <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 />® ® ® = M = = ® = = ® = = = = M = = M <br />