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S <br /> ASSOCIATED LABORATORIES <br /> QA REPORT FORM <br /> QC Sample LR 78275-915 water samples <br /> Method 8260 <br /> Analysis Date 08/24/01 <br /> Applies to LR 78275, 78446,78299,78298 <br /> REPORTING UNITS = ug/L <br /> Sample Spike Matrix Matrix %Rec %Ree QC Limits <br /> Test Result Added Spike S k. Dup MS MSD RPD RPD %REC <br /> 1,1-Dichloroethene ND 500 5798 5825 116 117 0 22 59-172 <br /> MTBE* 101 33 500 171 88 14976 141 97 1 14 24 62-137 <br /> Benzene ND 500 5364 5094 107 102 5 24 62-137 <br /> Tnchloroethene ND 500 5954 6006 119 120 l 1 21 66-142 <br /> Toluene ND 500 5931 5545 119 111 7 21 1 59-139 <br /> Chlorobenzene ND 500 5757 5465 115 109 5 21 60-133 <br /> •=Matrix Interference <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 /> 09/11/2001 8260_msd_0824w1 xls <br />