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GROUNDWATER <br />FOOTHILL SANITARY LANDFILL <br />Units: me, unless noted <br />Sample Designation MW -1 MW -1 MW -1 MW -1 MW -1 MW -1 MW -1 MW -1 MW -1 <br />Sampling Date 7/27/06 1/31/07 7/23/07 2/5/08 7/31/08 2/4/10 5/26/10 9/2/10 1/25/11 <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 />110 <br />Carbonate Alkalinity as CaCO3 <br />8' <br />NA <br />ND <br />ND <br /><20 <br /><2.5 <br />NA <br /><2.5 <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 />130 <br />Hydroxide Alkalinity as CaCO3 <br />NA <br />NA <br />NA <br />NA <br /><2.0 <br />NA <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 />NA <br />Sulfide <br />NA <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 />NA <br />Calcium <br />22.8 <br />18 <br />19 <br />18 <br />19 <br />18 <br />NA <br />22 <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 />4.0 <br />Magnesium <br />3.5 <br />3.1 <br />9.9 <br />9.9 <br />11.0 <br />12 <br />NA <br />l i <br />I 1 <br />Sodium <br />12.9 <br />13.0 <br />11.0 <br />10.0 <br />11.0 <br />13 <br />NA <br />15 <br />15 <br />Aluminum, Dissolved <br />NA <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 />NA <br />Arsenic, Dissolved <br />NA <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 />NA <br />Beryllium, Dissolved <br />NA <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 />NA <br />Cadmium, Dissolved <br />NA <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 />NA <br />Chromium Hexavalent <br />NA <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 />NA <br />Copper, Dissolved <br />NA <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 />NA <br />Lead, Dissolved <br />NA <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 />NA <br />Mercury, Dissolved <br />NA <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 />NA <br />Selenium, Dissolved <br />NA <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 />NA <br />Thallium, Dissolved <br />NA <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 />NA <br />Vanadium, Dissolved <br />NA <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 />NA <br />• = Trace Concentration <br />[ 1 ] This analytical result appears to be anomalous and therefore was not used in statistical evaluation procedures <br />(1) Parameter also detected in one or more quality control blanks <br />NA = Not Available <br />NM= Not Measured <br />n:\consult0hared\projects\xls\qmr\79\791289\FH-Hist (2).xls 0 <br />