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ASSOCIATED LABORATORIES <br /> QA REPORT FORM <br /> • <br /> QC Sample LR 89721-530 <br /> Matrix AIR <br /> Prep Date 03/14/02 <br /> Analysis Date 3/14/02-3/15/02 <br /> ID#'s to Batch LR 89726,89797,89798,89799,89800,89833 <br /> SAMPLE RESULT 1 SAMPLE DUPLICATE <br /> Sample Result I Sample Dup <br /> Test Method Reporting Units=Vppb RPD <br /> Benzene 8021 ND ND 0 <br /> Toluene 8021 93 94 1 <br /> Ethylbenzene 8021 26 28 7 <br /> Xylenes 8021 189 192 2 <br /> AM Gas 8015M ND ND 0 <br /> RPD LIMITS = 20 <br /> ND="U"-Not Detected <br /> RPD=Relative Percent Difference of Sample Result and Sample Duplicate <br /> I <br /> 3/20/2002 8021 air 0314 <br />