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ASSOCIATED LABORATORIES <br /> • QA REPORT FORM <br /> QC Sample 73149-731, water samples <br /> Method 8260/ 5242 <br /> Analysis Date 05/26/01 <br /> Applies to LR 73404, 73280 <br /> REPORTING UNITS = ug/L <br /> Sample Spike Matrix Matrix %Rec %Rec QC Limas <br /> Test Result Added Spike Spk Dup MS MSD RPD RPD %REC <br /> 1,1-13ichloroethene ND 500 4925 5598 99 112 13 22 59-172 <br /> MTBE ND 500 53 14 5245 106 105 1 24 62-137 <br /> Benzene ND 500 5953 6128 119 123 3 24 62-137 <br /> . Tnchloroethene ND 50 0 6278 6859 126 137 1 9 21 66-142 <br /> Toluene NO 50 0 5890 61 92 118 124 5 21 59-139 <br /> Chlorobenzene ND 50 0 5920 1 6357 1 118 1 127 7 J, 21 60-133 <br /> ND =Not Detected <br /> RPD =Relative Percent Difference of MS and MSD <br /> %.REC-MS&MSD =Percent Recovery of MS&MSD <br /> Method Blank= All ND <br /> 06/05/2001 8260 msd 0526w xis <br />