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ASSOCIATED LABORATORIES <br /> LCS REPORT FORM <br /> QC Sample LCS/LCSD <br /> A WATER <br /> Prep Date October 22,2004 <br /> Analysis Date October 22-23, 2004 <br /> LAB ID#'s in Batch LR 138859, 138768, 138880 <br /> REPORTING UNITS= ug/L <br /> LAB CONTROLLED SPIKE/LAB CONTROLLED DUPLICATE RESULT <br /> Sample Spike MatrixMatrix %Rec %Ree <br /> Test Method Result Added LCS TLCSD LCS LCSD RPD <br /> Benzene 8021 ND 20 174 170 87 85 2 <br /> Toluene 8021 ND 20 17 9 172 90 86 4 <br /> Ethylbenzene 8021 ND 20 189 182 1 95 91 4 <br /> es 8021 ND 60 554 529 92 88 5 <br /> ND=Not Detected <br /> RPD=Relative Percent Difference ofMatnx LCS and Matrix LCSD Y.REC LIMITS = 70 - 130 <br /> %REC-LCS&LCSD=Percent Recovery of LCS&LCSD RPD LIMITS = 30 <br /> SURROGATE RECOVERY <br /> Sample No AAA-TFT <br /> QC Limit 55-200 <br /> Method Blank 106 <br /> LCS 105 <br /> LCSD 112 <br /> AAA-TFT=a a a-Trtfluorotoluene <br /> • <br /> 10/29/2004 8021 BTEX LCS 1022 W <br />