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ASSOCIATED LABORATORIES <br /> LCS REPORT FORM <br /> QC Sample LCS/LCSD <br /> 'r <br /> Matrix <br /> Prep Date September 13,2005 <br /> w <br /> Analysis Date September 13 - 14,2005 <br /> LAB ID#'s in Batch LR 156352, 156503;156548 <br /> REPORTING UNITS= pg/L <br /> - <br /> LAB CONTROLLED SPIKE!LAB CONTROLLED DUPLICATE RESULT <br /> Sample Spike Matrix Matrix %Ree %Rec <br /> Test Method Result Added LCS LCSD LCS LCSD RPD <br /> Benzene 8021 ND 20 21.3 213 107 107 0 <br /> Toluene 8021 ND 20 209 207 105 104 1 <br /> Ethylbenzene 8021 ND 20 = 200 202 100 101 1 <br /> Xylenes 8021 ND 60 .600 - 600 100 - 100 0 <br /> ND=Not Detected <br /> RPD=Relative Percent Difference of Matrix LCS and Matru LCSD 151.RECLIMIYS = 70 - 130 <br /> _ -Y.REC--LCS&LCSD;Percent Recovery of LCS&LCSD--��w RPD LIMITS_ 30 <br /> SURROGATERECOVERY - ---- —--- ----- -- - - - - � - - - - - --- - -- ____..._.. _ _ ----�- - - --- --- ----- <br /> Sample No. AAA-TFT <br /> QC Limit 55-200 _ <br /> Method Blank 66 <br /> LCS 83 <br /> LCSD 85 - <br /> AAA-TFT=a,a,a-Trrfluorotoluene <br /> 9/23/2005 8021 BTEX LCS 0913 W2 <br />