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r <br /> i <br /> STL ChromaLab Submission#: 2001-07-0434 <br /> Environmental Services(CA 1094) <br /> To: Wright Environmental Services Inc Test Method: 80218 <br /> Attn: Chris' Pairner Prep Method: 5035 <br /> Batch QC Report <br /> GasBTEX by 8015M/8021 <br /> Laboratory Control Spike(LCS/LCSD) Soil QC Batch#2001/07/25-01.04 <br /> LCS 2001/07/25-01.04-004 Extracted: 07/25/200108:26 Analyzed 07/25/200108:26 <br /> LCSD: 2001107/25-01.04005 Extracted: 07/251200108:54 Analyzed 07/25/200108:54 <br />{ Compound Conc. [mg/Kg] Exp.Conc. [mg/Kg] Recovery[%] RPD Ctrl.Limits[%] Flags <br /> LCS LCSD LCS. LCSD LCS LCSD [%] Recovery RPD LCS LCSD <br /> Benzene 0.0900 0:0854 0.1000 0:1000 90.0 85A 5.2 77-123 35 <br /> Toluene 0.0935 0.0921 0.1000 0.1000 93.5 92.1 1.5 78-122 35 <br /> Ethyl benzene 0.0853 0.0872 0.1000 0.1000 85.3 87.2 2.2. 70-130 35 <br /> Xylene(s) 0.251 0.259 0.300 0.300 83.7 86.3 3.1 75-125 35 .. <br /> Surrogate(S) <br /> Trifluorotoluene 410 396 500 500 82.0 79.2 53-125 <br /> xi <br /> .i <br /> A <br /> i r 1220 Quarry Lane'Pleasanton,CA 94566-1756 <br /> Telephone:(925)484-1913 Facsimile:(925)484-1036 <br /> Printed on:0712612001 13:05 Page 12 of 13 <br />