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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />FOOTHILL SANITARY LANDFILL <br />Units: mg/l, unless noted <br />Sample Designation MW -1* MW -1* MW -1* MW -1* MW -1* MW -1 MW -1 MW -1 MW -1 MW -1 MW -1 MW -1 MW -1 Page 12 of 22 <br />Sampling Date 7/10/1989 10/20/1989 1/18/1990 4/5/1990 7/12/1990 10/2/1990 1/14/1991 4/3/1991 7/18/1991 10/10/1991 1/10/1992 4/3/1992 7/1/1992 <br />Constituents of Concern <br />Metals <br />Aluminum, Dissolved <br /><0.1 <br />0.1 <br />NR <br /><0.1 <br /><0.1 <br />NR <br />NR <br />NR <br /><0.1 <br />NR <br />NR <br />NR <br /><0.05 <br />Antimony, Dissolved <br /><0.05 <br /><0.05 <br /><0.05 <br /><0.05 <br /><0.05 <br />NR <br />NR <br />NR <br /><0.06 <br />NR <br />NR <br />NR <br /><0.05 <br />Arsenic, Dissolved <br />0.006 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />NR <br /><0.005 <br />Barium, Dissolved <br />0.01 <br />NR <br />0.012 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Beryllium, Dissolved <br /><0.002 <br />NR <br /><0.002 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Boron, Dissolved <br />0.12 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Cadmium, Dissolved <br /><0.005 <br /><0.005 <br /><0.005 <br /><0.005 <br /><0.005 <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />NR <br /><0.003 <br />Chromium, Total Dissolved <br />0.02 <br /><0.01 <br /><0.01 <br /><0.01 <br /><0.01 <br />NR <br />NR <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br /><0.005 <br />Chromium Hexavalent <br /><0.01 <br /><0.01 <br /><0.01 <br /><0.01 <br /><0.01 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.01 <br />Cobalt, Dissolved <br /><0.01 <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Copper, Dissolved <br />0.01 <br /><0.01 <br /><0.01 <br /><0.01 <br /><0.01 <br />NR <br />NR <br />NR <br /><0.02 <br />NR <br />NR <br />NR <br /><0.01 <br />Iron, Dissolved <br /><0.1 <br /><0.1 <br />NR <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.05 <br /><0.05 <br /><0.02 <br />Lead, Dissolved <br /><0.05 <br /><0.05 <br /><0.05 <br /><0.05 <br /><0.05 <br />NR <br />NR <br />NR <br /><0.05 <br />NR <br />NR <br />NR <br /><0.002 <br />Manganese, Dissolved <br />0.03 <br /><0.01 <br />0.017 <br /><0.01 <br /><0.01 <br />NR <br />NR <br /><0.01 <br /><0.01 <br /><0.01 <br />NR <br />NR <br /><0.005 <br />Mercury, Dissolved <br /><0.0002 <br /><0.0002 <br /><0.0002 <br /><0.0002 <br /><0.0002 <br />NR <br />NR <br />NR <br /><0.0002 <br />NR <br />NR <br />NR <br /><0.0005 <br />Nickel, Dissolved <br /><0.04 <br /><0.04 <br /><0.04 <br /><0.04 <br /><0.04 <br />NR <br />NR <br />NR <br /><0.04 <br />NR <br />NR <br />NR <br /><0.02 <br />Selenium, Dissolved <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />NR <br /><0.005 <br />Silver, Dissolved <br /><0.01 <br /><0.01 <br /><0.01 <br /><0.01 <br /><0.01 <br />NR <br />NR <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br /><0.01 <br />Thallium, Dissolved <br /><2 <br /><2 <br /><2 <br /><2 <br /><2 <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />NR <br /><0.005 <br />Tin, Dissolved <br /><0.05 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Vanadium, Dissolved <br /><0.01 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Zinc, Dissolved <br /><0.01 <br />0.019 <br />0.016 <br /><0.01 <br /><0.01 <br />NR <br />NR <br />NR <br /><0.02 <br />NR <br />NR <br />NR <br /><0.01 <br />Total Alkalinity <br />110 <br />106 <br />110 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />96.6 <br />NR <br />NR <br />NR <br />Alkalinity, Bicarbonate <br />110 <br />NR <br />110 <br />101 <br />99.5 <br />100 <br />99.8 <br />99.6 <br />96.5 <br />96.6 <br />100 <br />110 <br />100 <br />Alkalinity, Carbonate <br /><1 <br />NR <br /><1 <br /><1 <br /><1 <br /><t <br /><1 <br /><1 <br /><1 <br /><1 <br /><5 <br /><5 <br /><5 <br />Cyanide <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Sulfide <br /><0.05 <br /><0.05 <br /><0.05 <br /><0.05 <br /><0,05 <br /><0.05 <br /><0.05 <br /><0.05 <br /><0.05 <br /><0.05 <br /><0.1 <br /><0.1 <br /><0.1 <br />Total Organic Carbon <br />1.2 <br />0.74 <br />0.75 <br />1.2 <br />0.64 <br />NR <br /><0.5 <br />0.51 <br /><0.5 <br />0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />* = Trace Concentration <br />ND = Not Detected <br />NR = Not Required <br />N:\XLS\0939\00408\ list, Revision 1:3/31/2000 QA/QC <br />M M ® M = = M = = = M = = = M = = = M <br />