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ASSOCIATED LABORATORIES <br /> LCS. REPORT FORM <br /> 'QC Sample LCS/LCSD <br /> WATER------- <br /> Prep <br /> ATER-- --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 20 237 226 119 113 5 <br /> Toluene 8021 ND 20 23 2 221 116 111 5 <br /> Ethylbenzene 8021 ND 20 21 5 205 108 103 5 <br /> Xylenes _ 8021 ND 60 1666 638 111 106 4 <br /> ND=Not Detected <br /> RPD=Relative Percent Difference of Matnx LCS and Mainx LCSD IMECLIMM = 70 - 130 <br /> -%REC-LCS&LCSD=Percent Recovery of LCS&LCSD --__— RPD LIMITS=-30 —j <br /> _ <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=a,a,a-Trtuorotoluene <br /> 7/14/2005 8021 BTEX LCS 0708 WG-1 <br />