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ASSOCIATED LABORATORIES <br /> QA REPORT FORM <br /> QC Sample LR 73102-574 <br /> Matrix AIR <br /> Prep Date 05/19/01 <br /> Analysis Date 05/19101-05/20101 <br /> ID#'s in Batch LR 73119, 73102, 73120, 73123, 73148 <br /> SAMPLE RESULT/SAMPLE DUPLICATE <br /> Sample Result Sample Dup. Sample Result Sample Dup. <br /> Test Method Reporting Units =Vppm RPD Reporting Units = ug/L RPD <br /> Benzene 8021 ND ND 0 ND ND 0 <br /> Toluene 8021 1940 2340 19 7300 8800 19 <br /> Ethylbenzene 8021 8440 8500 1 36600 36700 0 <br /> Xylenes 8021 44500 44300 0 193300 192300 1 <br /> Gas 8015M 2,159 2,231 3 9,545 9,860 3 <br /> _] <br /> ND= "U"-Not Detected RPD LIMITS 20 <br /> RPD =Relative Percent Difference of Sample Result and Sample Duplicate <br /> • <br /> 05/23/2001 8021_air 0519 xis <br />