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== m= m r m i r r m m m r m m= m r <br />HISTORICAL SUMMARY OF MONITORING RESULTS <br />SURFACE WATER <br />NORTH COUNTY SANITARY LANDFILL <br />Smnplie Designatto. S-4 S-4 S-4 <br />Sampling Date 1/10/05 1/3/06 3/19/12• <br />Mopltorine anJ PIe1J Parameters <br />Oenerel Water Oualily Parvueters <br />Temperature (°C) 14.1 12.1 12.5 <br />Chloride 94 31 19.0 <br />Nitrate Nilroeen <023 0.6 NR <br />Sulfate <br />PH (std units) <br />34 <br />6.43 <br />25 <br />6.64 <br />NR <br />6.30 <br />ElxVieal Conductivity (u nhos/cm) <br />291 <br />247 <br />475.6 <br />Turbidity (NTLI) <br />48.1 <br />>200 <br />524 <br />Total Suspended Solids <br />8.0 <br />39.0 <br />NR <br />Alkalinity es CeCO3, Total <br />160 <br />86 <br />33.7 _. <br />Alkalinity, Bicarbonate <br />160 <br />86 <br />41.2 <br />Alkalinity, Carbonate <br /><5.0 <br /><2.2 <br /><10 <br />Cyanide <br /><0.025 <br />NR <br />NR <br />Sulfide <br /><0A0 <br />NR <br />NR <br />Hardness, Total <br />NR <br />NR <br />74.6 <br />Chemical Oxygen Demand <br />230 <br />NR <br />38.3 <br />Dissolved Oxy en <br />7.4 <br />0.68 <br />7.33 _. <br />McWe <br /><0.020 <br />NR <br />NR <br />Calcium, Total <br />29 <br />NR <br />14.4 <br />Magnesium, Total <br />16 <br />NR <br />9.40 <br />Potandrun, Total <br />90 <br />NR <br />NR <br />Total <br />26 <br />NR <br />NR <br />_Sodium, <br />Conalltuenta of Concern Parameters <br /><0.20 <br />NR <br />NR <br />Oil and Grease <br />6.0 <br />NR <br />NR <br />Metals <br /><00002 <br />NR <br />NR <br />Almninurt, Total <br /><0.20 <br />NR <br />NR <br />Antimony Total <br /><0.20 <br />NR <br />NR <br />Arsenic, Total <br /><0.20 <br />NR <br />NR <br />Barium, Total <br /><0.20 <br />NR <br />NR <br />Berylltnm, Total <br /><0.020 <br />NR <br />NR <br />_ <br />Boron, Total <br />NR <br />NR <br />NR <br />Cadmium, Total <br /><0.020 <br />NR <br />NR <br />Cluomtum, Total Dissolved <br /><0.020 <br />NR <br />NR <br />Clnomtmn Hexavalent <br />NR <br />NR <br />NR <br />Cobalt, Total <br /><0.080 <br />NR <br />NR <br />Copper, Total <br /><O 020 <br />NR <br />NR <br />Iron, Total <br />1.7 <br />NR <br />NR <br />Lead, Total <br /><0.20 <br />NR <br />NR <br />Manganese, Total <br />0.31 <br />NR <br />NR <br />Mercn ,Total <br /><00002 <br />NR <br />NR <br />Molybdenum, Total <br />NR <br />NR <br />NR <br />Nickel, Total <br />0.23 <br />NR <br />NR <br />Selenium, Total <br /><0.20 <br />NR <br />NR <br />Sit -,Total <br />0.088 <br />NR <br />NR ,- <br />Slrontium,Tola1 <br />NR <br />NR <br />NR <br />Thallium, Total <br />0.36 <br />NR <br />NR <br />Tin, Total <br /><0.10 <br />NR <br />NR <br />Vanadium, Total <br /><0.080 <br />NR <br />NR <br />Zinc, Total <br /><0.080 <br />NR <br />NR <br />[ I I PH meter was not ft ¢Iioning wrreclly <br />[2J These data appear to be ammnalous and are not used in the statistical evaluation. <br />NR = Not Required, NT = Not Teased -dry <br />