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ASSOCIATED LABORATORIES <br /> - QA REPORT FORM-METHOD 826016241524.2 <br /> QC Sample MS/MSD-Water Samples 135028-262 <br /> esis Date Aug 25-04 <br /> Applies to LR 135071, 135065, 134936, 134945, 134946, 134905, 134904, 135028, 134948 <br /> Reporting Units= ug/L <br /> Matrix Spike 1 Matrix Spike Duplicate <br /> Sample Spike Matrix Matrix %Rec %Rec QC Limits <br /> Test Result Added Spike Spk Dup MS MSD RPD RPD %REC <br /> 1 1-Dichloroethene ND 50 6260 6151 125 123 2 22 59-172 <br /> MTBE 146 50 4947 4956 96 96 0 24 62-137 <br /> Benzene ND 50 5106 5091 102 102 0 24 62-137 <br /> Tnchloroethene ND 50 5019 4963 100 99 1 21 66-142 <br /> Toluene ND 50 51 15 4950 102 99 3 21 59-139 <br /> Chlorobenzene ND 50 5173 5061 103 101 2 21 60-133 <br /> QC Sample LCS/LCSD <br /> Analysts Date Aug 25-04 <br /> Lab Controlled Spike/Lab Controlled Spike Duplicate <br /> Sample Spike LCS LCS %Rec %Rec QC Limits <br /> 0 1 Result I Added Spike Spk Du p LCS LCS D RPD RPD %REC <br /> 1,1-Dichloroethene ND 50 6237 6287 125 126 1 22 59-172 <br /> MTBE ND 50 4665 4717 93 94 1 24 62-137 <br /> Benzene ND 50 5087 5082 102 102 0 24 62-137 <br /> Tnchloroethene ND 50 5052 5079 101 102 1 21 66-142 <br /> Toluene ND 50 5100 5134 102 103 1 21 59-139 <br /> Chlorobenzene ND 50 5047 5149 101 103 2 21 60-133 <br /> Method Blank=All ND <br /> SURROGATE ( QC Limits : 70-135) <br /> Compounds DBFM 1,2-DCA Tol-d8 p-BFB <br /> MS 104 94 100 100 <br /> MSD 101 92 99 98 <br /> LCS 99 92 100 102 <br /> LCSD 99 93 100 104 <br /> BLANK 9 1 107 108 100 104 <br /> BLANK#2 105 107 102 102 <br /> 813012004 8260 MSD-LCSD 0825 W <br />