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ASSOCIATED LABORATORIES <br /> QA REPORT FORM <br /> QC Sample LR 78275-915 water samples <br /> Method 8260 _ <br /> Analysts Date 08/24/01 <br /> Applies to LR 78275, 78446, 78299 _ <br /> REPORTING UNITS = ug/L <br /> Sample Spike Matrix Matrix %Rec %Rec QC Limits <br /> Test Result Added Spike S k. Dup MS MSD RPD RPD -/oREC <br /> I,I-Dichloroethene ND 500 5798 5825 116 117 0 22 59-172 <br /> MTBE* 101 33 500 17188 14976 141 97 14 24 62-137 <br /> Benzene ND 500 5364 50 94 107 102 5 24 62-137 <br /> Trichloroethene ND 500 5954 6006 119 120 1 21 66-142 <br /> Toluene ND 500 5931 5545 11911 1 7 21 59-139 <br /> Chlorobenzene ND 500 5757 5465 115 <br /> l09 5 21 60-133 <br /> *=Matrix Interference <br /> ND=Not Detected <br /> i <br /> RAD=Relative Percent Difference of MS and MSD <br /> %oREC-MS&MSD=Percent Recovery of MS&MSD <br /> Method Blank=All ND <br /> • <br /> 08/31/2001 8260 msd 0824wl As <br />