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ASSOCIATED LABORATORIES <br /> LCS REPORT FORM <br /> QC Sample LCS/LCSD <br /> WATER <br /> Prep Date July 8,2005 <br /> Analysis Date July 8,2005 <br /> LAB ID#'s in Batch LR 153172 <br /> REPORTING UNITS= ug/L. <br /> LAB CONTROLLED SPIKE/LAB CONTROLLED DUPLICATE RESULT <br /> Sample Spike Matrix Matrix %Rec %Rec <br /> Test Method Result Added LCS LCSD LCS LCSD RPD <br /> Benzene 8021 ND 20 237 22 6 119 113 5 <br /> Toluene 8021 ND 20 232 221 116 1 1 1 5 <br /> Ethylbenzene 8021 ND 20 215 205 108 103 5 <br /> Xylenes 8021 ND 60 666 63 8 111 106 4 <br /> ND=Not Detected <br /> RPD=Relative Percent Difference of Maim LCS and Matrix LCSD %REC LIMITS = 70 - 130 <br />©.REC-LCS&LCSD=Percent Recovery of LCS&LCSD RPD L mn S = 30 <br /> SURROGATE RECOVERY <br /> Sample No. AAA-TFT <br /> QC Limit 55-200 <br /> Method Blank 94 <br /> LCS 102 <br /> LCSD 98 <br /> AAA-TFT=aa a-Trifluorotoluene <br /> 0 <br /> 7/14/2005 8021 BTEX LCS 0708 WG-1 <br />