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® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® <br /> HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> GROUNDWATER <br /> FOOTHILL SANITARY LANDFILL <br /> MW-1 <br /> Units:min, unless noted <br /> sample Designation <br /> Sampling Date 10/14/02 1/29/03 5/30/03 8/13/03 1/22/04 <br /> Constituents of Concern Parameters <br /> Chlorinated Herbicides <br /> EPA Method 8150A Modified <br /> All Compounds NR NR NR NR NR <br /> Metals <br /> A uminum,Dissolved <br /> Antimony,Dissolved NR NR <br /> rsenic,Dissolved <br /> Barium,Dissolved <br /> Beryllium,Dissolved <br /> ron,Dissolved NR NR NR NR NR <br /> Cadmium, sso ve NR NR <br /> Chromium,Total Dissolved <br /> Chromium Hexavalent <br /> Cobalt,Dissolved NR NR NR NR NR <br /> Copper, issolve NR NR NR NR NR <br /> iron,Dissolved <br /> Lead, Dissolved- <br /> Manganese,Dissolved <br /> ercu ,Dissolved <br /> Nickel,Dissolved <br /> Selenium,Dissolved NR NR NR NR NR <br /> Silver,Dissolved NR NR NR NR NR <br /> —Thallium,Dissolved NR NR NR NR NR <br /> Tin,Dissolved <br /> Vanadium,Dissolved <br /> Zinc,Dissolved NR NR NR NR NR <br /> Total a mty NR NM 97 96 98 <br /> pfd—a7in—ity,Bicarbonate NR NM 97 96 98 <br /> Alkalinity,Carbonate NR NM <0.5 < <5.0 <br /> �anile NR NR NR NR NR <br /> uie NR NR NR NR NR <br /> Total Organic Carbon NR NR NR NR NR <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 /> ND=Not Detected <br /> NM=Not Measured <br /> NR=Not Required <br /> MW-1;Printed:7/26/2004 8 of 28 <br />