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ASSOCIATED LABORATORIES <br /> QA REPORT FORM- METHOD 8260 /624 /524.2 <br /> QC Sample MS/MSD-Water Samples 141569-458 <br /> Acts Date December 10,2004 3 47 AM <br /> Applies to LR 141529, 141435, 141397, 141569, 141673 <br /> i <br /> Reporting Units= ug/L <br /> Matrix Spike/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 4201 4061 84 81 3 22 59-172 <br /> MTBE 6036 50 10334 10028 86 80 3 24 62-137 <br /> Benzene 18443 50 21958 21532 70 62 2 24 62-137 <br /> Tnchloroethene ND 50 4629 4688 93 94 1 21 66-142 <br /> Toluene 121 58 50 15482 15564 66 68 1 21 59-139 <br /> Chlorobenzene ND 50 4561 4488 91 90 2 21 60-133 <br /> QC Sample LCS/LCSD 10 47 AM <br /> Analysis Date December 9,2004 <br /> L Controlled Spike 1 Lab Controlled Spike Duplicate <br /> Sample Spike LCS LCS %Rec %Rec QC Limits <br /> Test Result Added Spike Spk Dup LCS LCS D RPD RPD %REC <br /> 1,1-Dichloroethene ND 50 3193 3364 64 67 5 22 59-172 <br /> MTBE ND 50 4410 4654 88 93 5 24 62-137 <br /> Benzene ND 50 4450 4692 89 94 5 24 62-137 <br /> Trichloroethene ND 50 4446 4769 89 95 7 21 66-142 <br /> Toluene ND 50 4459 4734 89 95 6 21 59-139 <br /> Chlorobenzene ND 50 4337 4595 87 92 6 21 60-133 <br /> Method Blank—All ND <br /> SURROGATE ( QC Limits : 70-135) <br /> Compound MB 3 MB 4 MS MSD LCS LCSD <br /> DBFM 100 97 98 96 98 99 <br /> 1,2-DCA 114 112 78 75 100 101 <br /> Tol-d8 100 101 98 100 99 99 <br /> p-BFB 101 99 101 102 101 100 <br /> 12/16/2004 8260 MSD-LCSD 1210 Wl <br />