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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />FOOTHILL SANITARY LANDFILL <br />Units: nig/l, unless noted <br />Sample Designation MW -2 MW -2 MW -2 LW -I LW -I LW -1 LW -I LW -1 LW -I LW -1 LW -1 LW -I LW -I LW- -1 <br />Sampling Date 7/7/1999 10/20/1999 3/8/2000 7/10/1989 10/20/1989 1/17/1990 4/4/1990 7/12/1990 10/2/1990 1/7/1991 4/2/1991 7/19/1991 10/9/1991 1/10/1992 4/3/1992 <br />Constituents of Concern <br />Metals <br />Aluminum, Dissolved <br />NR <br /><0.028 <br />NR <br /><0.1 <br />NR <br />NR <br />NR <br /><0.1 <br />NR <br />NR <br />NR <br /><0.1 <br />NR <br />NR <br />NR <br />Antimony, Dissolved <br />NR <br />0.0272* <br />NR <br /><0.05 <br />NR <br />NR <br />NR <br /><0.05 <br />NR <br />NR <br />NR <br /><0.06 <br />NR <br />NR <br />NR <br />Arsenic, Dissolved <br />NR <br /><0.0192 <br />NR <br /><0.1 <br />NR <br />NR <br />NR <br /><0.1 <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />NR <br />Barium, Dissolved <br />NR <br />0.0665* <br />NR <br />0.11 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Beryllium, Dissolved <br />NR <br /><0.0012 <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 />NR <br />Boron, Dissolved <br />NR <br /><0.022 <br />NR <br />0.04 <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 />NR <br /><0.036 <br />NR <br /><0.005 <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />NR <br />Chromium, Total Dissolved <br />NR <br /><0.056 <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br />Chromium Hexavalent <br />NR <br />0.00149* <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Cobalt, Dissolved <br />NR <br /><0.0028 <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 />NR <br />Copper, Dissolved <br />NR <br /><0.0042 <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br /><0.02 <br />NR <br />NR <br />NR <br />Iron, Dissolved <br />NR <br />0.0074* <br />NR <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.05 <br /><0.05 <br />Lead, Dissolved <br />NR <br /><0.0198 <br />NR <br /><0.05 <br />NR <br />NR <br />NR <br /><0.05 <br />NR <br />NR <br />NR <br /><0.05 <br />NR <br />NR <br />NR <br />Manganese, Dissolved <br />NR <br /><0.001 <br />NR <br /><0.01 <br />NR <br /><0.01 <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br />Mercury, Dissolved <br />NR <br /><0.0002 <br />NR <br /><0.0002 <br />NR <br />NR <br />NR <br /><0.0002 <br />NR <br />NR <br />NR <br /><0.0002 <br />NR <br />NR <br />NR <br />Nickel, Dissolved <br />NR <br /><0.0106 <br />NR <br /><0.04 <br />NR <br />NR <br />NR <br /><0.04 <br />NR <br />NR <br />NR <br /><0.04 <br />NR <br />NR <br />NR <br />Selenium, Dissolved <br />NR <br /><0.036 <br />NR <br /><0.2 <br />NR <br />NR <br />NR <br /><0.2 <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />NR <br />Silver, Dissolved <br />NR <br /><0.0026 <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br />Thallium, Dissolved <br />NR <br /><0.024 <br />NR <br /><2 <br />NR <br />NR <br />NR <br /><2 <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />NR <br />Tin, Dissolved <br />NR <br />0.054 <br />NR <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 />Vanadium, Dissolved <br />NR <br />0.0203* <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 />NR <br />Zinc, Dissolved <br />NR <br />0.0202 <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br /><0.02 <br />NR <br />NR <br />NR <br />Total Alkalinity <br />NR <br />73.1 <br />NR <br />104 <br />102 <br />108 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />102 <br />NR <br />NR <br />Alkalinity, Bicarbonate <br />NR <br />73.1 <br />NR <br />104 <br />NR <br />108 <br />102 <br />100 <br />102 <br />100 <br />102 <br />98 <br />102 <br />110 <br />94 <br />Alkalinity, Carbonate <br />NR <br /><0.808 <br />NR <br /><1 <br />NR <br /><1 <br /><1 <br /><1 <br /><I <br /><1 <br /><1 <br /><1 <br /><1 <br /><5 <br /><5 <br />Cyanide <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 />NR <br />NR <br />NR <br />Sulfide <br />NR <br /><0.5 <br />NR <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 />Total Organic Carbon <br />NR <br />1.56* <br />NR <br /><0.5 <br />0.51 <br />0.83 <br />0.72 <br />0.66 <br />NR <br /><0.5 <br /><0.5 <br /><0.5 <br />0.51 <br /><0.5 <br /><0.5 <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 M M M M ® M <br />