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ASSOCIATED LABORATORIES <br /> QA REPORT FORM <br /> QC Sample 73149-731, water samples <br /> Method 8260 / 5242 <br /> Analysis Date 05/24/01 <br /> Applies to LR 73215, 73281 <br /> REPORTING UNITS = ug/L <br /> Sample Spike Matrix Matrix %Rec %Ree QC Limits <br /> Test Result Added Spike Spk.Dup MS MSD RPD RPD %REC <br /> 1,1-Dichloroethene 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 1 62-137 <br /> • Trichloroethene ND 50 0 6278 6859 126 137 9 21 66-142 <br /> Toluene ND 500 5890 6192 118 124 5 21 59-139 <br /> LChlorobenzene ND 500 5920 6357 1 118 127 7 21 60-I33 <br /> ND =Not Detected <br /> RPD =Relative Percent Difference of MS and MSD <br /> V.REC-MS&MSD =Percent Recovery of MS&MSD <br /> Method Blank= All ND <br /> 06/06/2001 8260_msd_0524w xls <br />