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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />FOOTHILL SANITARY LANDFILL <br />Units: mg/I, unless noted <br />Sample Designation <br />S-2 <br />S-2 <br />S-2 <br />S-2 <br />S-2 <br />S-2 <br />S-2 <br />S-2 <br />S-2 <br />S-2 <br />Page 4 of 4 <br />S-2 <br />Sampling Date <br />03/01/91 <br />03/27/91 <br />11/18/91 <br />12/18/91 <br />03/06/92 <br />01/08/93 <br />01/16/95 <br />01/16/97 <br />03/11/98 <br />02/09/99 <br />01/24/00 <br />Constituents of Concern <br />Total Organic Carbon <br />4.4 <br />4.4 <br />7.6 <br />73.3 <br />6.1 <br />11.8 <br />NR <br />NT <br />NT <br />NT <br />21.1 <br />Alkalinity, Bicarbonate <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />26 <br />NT <br />NT <br />NT <br />21.1 <br />Alkalinity, Carbonate <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><4 <br />NT <br />NT <br />NT <br /><0.808 <br />Alkalinity, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />26 <br />NT <br />NT <br />NT <br />21.1 <br />Cyanide, Total <br />NR <br />NR <br />Nit <br />NR <br />Nil <br />NR <br /><0.003 <br />NT <br />NT <br />NT <br />0.00317* <br />Sulfide <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.6 <br />NT <br />NT <br />NT <br /><0.5 <br />Chemical Oxygen Demand <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />28 <br />NT <br />NT <br />NT <br />37.5 <br />Dissolved Oxygen <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />11.80 <br />NT <br />NT <br />NT <br />1.81 <br />Oil and Grease <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />0.5 <br />NT <br />NT <br />NT <br />1.47 <br />Metals <br />Aluminum, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />2.7 <br />NT <br />NT <br />NT <br />0.968 <br />Antimony, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.5 <br />NT <br />NT <br />NT <br /><0.0069 <br />Arsenic, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.002 <br />NT <br />NT <br />NT <br /><0.0096 <br />Barium, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />0.11 <br />NT <br />NT <br />NT <br />0.0667 <br />Beryllium, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.002 <br />NT <br />NT <br />NT <br /><0.0006 <br />Boron, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.0I I <br />Cadmium, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.003 <br />NT <br />NT <br />NT <br /><0.0018 <br />Calcium, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NT <br />NT <br />NT <br />NR <br />Chromium, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.005 <br />NT <br />NT <br />NT <br /><0.0028 <br />Chromium Hexavalent <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.0023 <br />NT <br />NT <br />NT <br /><0.0018 <br />Cobalt, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.01 <br />NT <br />NT <br />NT <br /><0.0014 <br />Copper, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.01 <br />NT <br />NT <br />NT <br /><0.0021 <br />Iron, Total <br />0.28 <br />0.33 <br />0.12 <br /><0.1 <br />1.7 <br /><0.05 <br />2.4 <br />NT <br />NT <br />NT <br />0.905 <br />Lead, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />0.002 <br />NT <br />NT <br />NT <br /><0.0099 <br />Magnesium, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NT <br />NT <br />NT <br />NR <br />Manganese, Total <br /><0.01 <br /><0.01 <br /><0.01 <br />0.87 <br />0.41 <br /><0.05 <br />0.08 <br />NT <br />NT <br />NT <br />0.0269 <br />Mercury, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.0005 <br />NT <br />NT <br />NT <br />ND <br />Nickel, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.02 <br />NT <br />NT <br />NT <br /><0.0053 <br />Potassium, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NT <br />NT <br />NT <br />NR <br />Selenium, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.003 <br />NT <br />NT <br />NT <br /><0.018 <br />Silver, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.005 <br />NT <br />NT <br />NT <br /><0.0013 <br />Sodium, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NT <br />NT <br />NT <br />NR <br />Thallium, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.003 <br />NT <br />NT <br />NT <br /><0.012 <br />Tin, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.1 <br />NT <br />NT <br />NT <br /><0. 1264 <br />Vanadium, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.01 <br />NT <br />NT <br />NT <br /><0.0024 <br />Zinc, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />0.02 <br />NT <br />NT <br />NT <br />0.00715 <br />Alkalinity, Hydroxide <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NT <br />NT <br />NT <br /><0.808 <br />Hardness, Total <br />13.2 <br />20 <br />27.7 <br />676 <br />53 <br />39 <br />NR <br />NT <br />NT <br />NT <br />NR <br />NR = Not Required <br />N:\XLS\0939\00408\022196yy.XLS, Revision 2: 3/24/2000 QA/QC <br />® ® ® = M M M = M = ® = M M M = M M _ <br />