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., STL ChromaLab Submission # 2001-01-0332 <br /> Environmental Services(CA 1094) <br /> To Wright Environmental Services Inc Test Method 8020 <br /> Attn Chris Palmer Prep Method 5030 <br /> Batch QC Report <br /> Gas/BTEX <br /> Laboratory Control Spike (LCS/LCSD) Water QC Batch#2001101122-01 01 <br /> LCS 2001/01/22-01 01-004 Extracted 01/22/2001 10 23 Analyzed 01/22/2001 10 23 <br /> LCSD 2001101122-01 01-005 Extracted 01/22/2001 10 56 Analyzed 01/22/2001 10 56 <br /> Compound Conc [ug/L] Exp Conc [ug/L lRecovery[%]I RPD Ctrl Limits[%j Flags <br /> LCS I LCSD LCS LCSD I LCS LCSD I [%] Recovery RPD LCS LCSD <br /> Benzene 119 119 1000 1000 1190 1190 0 0 77-123 20 <br /> Toluene 109 108 1000 E 1000 109 D 1080 0 9 78-122 20 <br /> Ethyl benzene 116 118 100 1000 1160 118 0 I 1 7 70-130 20 <br /> Xylene(s) 351 351 300 300 1170 1170 00 75-125 20 <br /> Surrogate(s) <br /> Tritluoratoluene 578 582 500 I 500 1156 1164 58-124 <br /> I <br /> 1220 Quarry Lane`Pleasanton CA 94566-4756 <br /> Telephone (925)484-,919 =acsimile (925)484-1096 <br /> Printed an 01/25/2001 13 07 Page 16 of 20 <br />