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GROUNDWATER <br />FOOTHILL SANITARY LANDFILL <br />Units: mg/l, unless noted <br />Sample Designation <br />Sampling Date <br />MW -1 <br />7/27/06 <br />MW -1 <br />1/31/07 <br />MW -1 <br />7/23/07 <br />MW -1 <br />2/5/08 <br />MW -1 <br />7/31/08 <br />MW -1 <br />2/4/10 <br />MW -1 <br />5/26/10 <br />MW -1 <br />9/2/10 <br />Constituents of Concern Parameters <br />Alkalinity as CaCO3 <br />96 <br />93 <br />NA <br />NA <br />94 <br />92 <br />NA <br />100 <br />Carbonate Alkalinity as CaCO3 <br />8' <br />NA <br />ND <br />ND <br /><2.0 <br /><2.5 <br />NA <br /><2.5 <br />Bicarbonate Alkalinity as HCO3 <br />88 <br />110 <br />48 <br />130 <br />110 <br />110 <br />NA <br />120 <br />Hydroxide Alkalinity as CaCO3 <br />NA <br />NA <br />NA <br />NA <br /><2.0 <br />NA <br />NA <br />NA <br />Cyanide <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Sulfide <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Total Organic Carbon <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Calcium <br />22.8 <br />18 <br />19 <br />18 <br />19 <br />18 <br />NA <br />22 <br />Potassium <br />11.2 <br />9.6 <br />3.1 <br />2.8 <br />3.0 <br />3 <br />NA <br />3.5 <br />Magnesium <br />3.5 <br />3.1 <br />9.9 <br />9.9 <br />11.0 <br />12 <br />NA <br />ll <br />Sodium <br />12.9 <br />13.0 <br />11.0 <br />10.0 <br />11.0 <br />13 <br />NA <br />15 <br />Metals <br />Aluminum, Dissolved <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Antimony, Dissolved <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Arsenic, Dissolved <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Barium, Dissolved <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Beryllium, Dissolved <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Boron, Dissolved <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Cadmium, Dissolved <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Chromium, Total Dissolved <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Chromium Hexavalent <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Cobalt, Dissolved <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Copper, Dissolved <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Iron, Dissolved <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Lead, Dissolved <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Manganese, Dissolved <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Mercury, Dissolved <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Nickel, Dissolved <br />NA <br />NA <br />NA <br />NA <br />- NA <br />NA <br />NA <br />NA <br />Selenium, Dissolved <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Silver, Dissolved <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Thallium, Dissolved <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Tin, Dissolved <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Vanadium, Dissolved <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Zinc, Dissolved <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />• = Trace Concentration <br />[I ] This analytical result appears to be anomalous and therefore was not used in statistical evaluation procedures <br />(I } Parameter also detected in one or more quality control blanks <br />NA = Not Available <br />n:\conslea\shared\projects\xls\qmr\79\791289\FH-Hist Rl.xls 0 <br />