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ASSOCIATED LABORATORIES <br /> QA REPORT FORM <br /> QC Sample 73426-893, water samples <br /> Method 8260 / 5242 <br /> Analysis Date 05/30/01 <br /> Applies to LR 73426, 73407, 73458, 73345, 73504 <br /> REPORTING UNITS = ug/L <br /> Sample Spike Matrix Matrix %Ree %Rec QC Limits <br /> Test Result Added Spike Spk. Dup MS MSD RPD RPD %REC <br /> 1,1-Dichloroethene ND 500 46 10 4440 92 89 4 22 59-172 <br /> MTBE ND 500 33 18 3856 66 77 15 24 62-137 <br /> Benzene ND 500 4895 4994 98 100 2 24 62-137 <br /> Tnchloroethene ND 50 0 4881 4992 98 100 2 21 66-142 <br /> • Toluene ND 500 46 13 4743 92 95 3 21 59-139 <br /> Chlorobenzene ND 500 5045 5076 101 102 1 1 21 60-133 <br /> ND =Not Detected <br /> RPD =Relative Percent Dtff`erence of MS and MSD <br /> %REC-MS&MSD =Percent Recovery of MS&MSD <br /> Method Blank = All ND <br /> 06/07/2001 8260_msd_0530w xls <br />