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STL Chroma,..ab Submission #: 2001-08-0604 <br /> Environmental Services(CA 1094) <br /> To: ACC Environmental Consultants Test Method: 8021B <br /> Attn: Trevor Bausman Prep Method: 5035 <br /> Batch QC Report <br /> Gas/BTEX Compounds by 8015M/8021 <br /> Laboratory Control Spike (LCS/LCSD) Soil QC Batch #2001/09/04-01.02 <br /> LCS: 2001/09/04-01.02-005 Extracted: 09/04/200109:19 Analyzed 09/04/200109:19 <br /> LCSD: 2001/09/04-01.02-006 Extracted: 09/04/200109:51 Analyzed 09/04/200109:51 <br /> Compound Conc. [mg/Kg] Exp.Conc. [mg/Kg] Recovery[%] RPD Ctd. Limits[%] Flags <br /> LCS LCSD LCS LCSD LCS I LCSD [%] Recovery RPD LCS LCSD <br /> Benzene 0.0982 0.0916 0.1000 0.1000 98.2 91.6 7.0 77-123 35 <br /> Toluene 0.0983 0.0919 0.1000 0.1000 98.3 91.9 6.7 78-122 35 <br /> Ethyl benzene 0.0989 0.0921 0.1000 0.1000 98.9 92.1 7.1 70-130 35 <br /> Xylene(s) 0.282 0.265 0.300 0.300 94.0 88.3 6.3 75-125 35 <br /> Surrogate(s) <br /> Trifluorotoluene 548 503 500 500 109.6 100.6 53-125 <br /> 1220 Quarry Lane•Pleasanton,CA 94566-4756 <br /> Telephone:(925)484-1919'Facsimile:(925)484-1096 <br /> Printed on:09/05/2001 11:25 Page 10 of 11 <br />