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ASSOCIATED LABORATORIES <br /> LCS REPORT FORM <br /> QC Sample LCS/LCSD <br /> Matrix WATER 0 <br /> Prep Date September 13,2005 <br /> Analysis Date September 13 - 14,2005 <br /> LAB ID#'s in Batch LR 156352, 156503, 156548 <br /> REPORTING UNITS= pglL <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 20 213 213 107 107 0 <br /> Toluene 8021 ND 20 209 207 105 104 1 <br /> Ethylbenzene 8021 ND 20 200 1 202 100 101 1 <br /> Xylenes 8021 ND 60 600 60 0 100 100 0 <br /> ND=Not Detected <br /> RPD=Relative Percent Difference of Mainz LCS and Matnx LCSD °�.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 66 <br /> LCS 83 <br /> LCSD 85 <br /> AAA-TFT=a,a a-Tnrfluorotoluene <br /> 9/23/2005 8021 BTEX LCS 0913 W2 <br />