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a <br /> Submission#: 2001-07-0408 <br /> STL ChromaLab <br /> Environmental Services(CA 1094) <br /> To: Wright Environmental Services Inc Test Method: 8021 B <br /> Attn: Chris Palmer Prep Method: 5035 <br /> Batch QC Report <br /> GasBTEX Compounds by 8015M/8021 <br /> Laboratory Control Spike(LCS/LCSD) Soil QC Batch#2001/07/24-01.04 <br /> LCS: 2001/07/24-01.04-004 Extracted: 07/24/200108:37 Analyzed 07124/200108:37 <br /> LCSD: 2001/07/24-01.04-005 Extracted: 07/24/200109:05 Analyzed 07/24/200109:05 <br /> Compound Conc. [mg/Kg I Exp.Conc. [mg/Kg] Recovery[%j RPD CM.Limits[%j Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%) Recovery RPD LCS LCSD j <br /> Benzene 0.0896 0.0902 0.1000 0.1000 89.6 90.2 0.7 77-923 35 <br /> Toluene 0.0938 0.0954 0.1000 0.1000 93.8 95.4 1.7 78-122 35 <br /> Ethyl benzene 0.0853 0.0872 0.1000 0.1000 85.3 87.2 2.2 MAW 35 <br /> Xylene(s) 0.252 0.258 0.300 0.300 84.0 86.0 2.4 75-125 35 <br /> Surrogate(s) <br /> Trilluorotoluene 409 406 500 500 81.8 81.2 53-125 <br /> 1220 Quarry lane*Pleasanton,CA 94566-4756 <br /> Telephone:(925)4841919"Facsimile:(925)4841096 <br /> Printed on:07/26/2001 13:02 Page 15 of 20 <br />