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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />SURFACE WATER <br />FOOTHILL SANITARY LANDFILL <br />S-1 <br />Units: mg/I, unless noted <br />Sample Designation <br />S-1 <br />S-1 <br />S-1 <br />S-1 <br />S-1 <br />S-1 <br />S-1 <br />S-1 <br />S-1 <br />S-1 <br />S-1 <br />S-1 <br />S-1 <br />S-1 <br />S-1 <br />S-1 <br />Sampling Date <br />01/17/90 02/05/90 03/01/91 03/27/91 11/18/91 12/18/91 03/06/92 01/08/93 01/16/96 01/16/97 01/12/98 02/09/99 01/24/00 01/11/01 01/02/02 12/16/02 <br />Monitoring and Field Parameters <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.6 <br />NR <br />NR <br />NR <br /><0.5 <br />NR <br />NR <br />NR <br />Chemical Oxygen Demand <br />136 <br />NR <br />Q20graj meter uality Parameterr <br />NR <br />NR <br />NR <br />NR <br />NR <br />32 <br />NR <br />NR <br />NR <br />37.5 <br />NR <br />NR <br />NR <br />Dissolved Oxygen <br />NR <br />NR <br />-_Chloride --- - - - - <br />- -- <br />198 <br />3.1 <br />31.1 <br />688 <br />9219.4 <br />11.80 <br />11 <br />- 3 <br />2 <br /><1 <br />- 0.15.. <br /><0.010 <br />- 2.4 <br />2.83 --- <br />5.2 - <br />- 6.6-- ---- <br />Nitrate Nitrogen <br />5.4 <br /><0.05 <br />NR <br />NR <br />NR -- <br />R <br />NR <br />0.9 <br />0.5 <br />0.5. <br />_- <0.1_____ <br />0.034 <br />0.028 <0.0043 <br />NR <br /><0.045 <br />-0.046 <br />-0.11= --- <br />Total Dissolved Solids <br />928 <br />103 <br />345 <br />2210 <br />594 <br />138 <br />220 <br />140 <br />88 <br />80 <br />83 <br />120 <br />106 <br />154 <br />250 <br />100 <br />Total Suspended Solids <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />63 <br />21.5 <br />78 <br />24 <br />14 <br />44 <br />820 <br />35 <br />Sulfate <br />135 <br />3.1 <br />39 <br />267 <br />5.5 <br />5.2 <br />9 <br /><5 <br />trace <br /><1 <br />1.3 <br /><0.052 <br />3.1R <br />3-1A <br />9 A <br />2-9 <br />PH (units) NR NR NR NR NR NR 7.69 NT 7.17 7.7 NT 6.12 6.85 6.91 8.11 7.31 <br />i <br />Constituents of Concern Parameters <br />i otai organic t;amon 44.9 33.5 13.6 94.1 20 28.5 1.7 13.4 NR NR NR NR 15.9 NR NR NR <br />Alkalinity, Bicarbonate 301 NR NR NR NR NR NR NR 30 NR NR NR 20.7 NR NR NR <br />Alkalinity, Carbonate <1 NR NR NR NR NR NR NR <4 NR NR NR <0.808 NR NR NR <br />Alkalinity, Total 301 NR NR NR NR NR NR NR 30 NR NR NR 20.7 NR NR NR <br />cyanioe, Total <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.003 <br />NR <br />NR <br />NR <br /><0.002 <br />NR <br />NR <br />NR ` <br />Sulfide <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><0.6 <br />NR <br />NR <br />NR <br /><0.5 <br />NR <br />NR <br />NR <br />Chemical Oxygen Demand <br />136 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />32 <br />NR <br />NR <br />NR <br />37.5 <br />NR <br />NR <br />NR <br />Dissolved Oxygen <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />11.80 <br />NR <br />NR <br />NR <br />1.61 <br />NR <br />NR <br />NR <br />Oil and Grease <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />0.6 <br />NR <br />NR <br />NR <br />1.28 <br />NR <br />NR <br />NR <br />NR = Not Required <br />NT = Not Tested <br />S-1: Printed: 3/4/03 Page 1 of 4 <br />