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STL Chromalrr,ab Submission #: 2001-08-0604 <br /> Environmental Services(CA 1094) <br /> To: ACC Environmental Consultants Test Method: 8021 B <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#2001/09/05-01.02 <br /> LCS: 2001/09/05-01.02-005 Extracted: 09/05/200109:25 Analyzed 09/05/200109:25 <br /> LCSD: 2001/09/05-01.02-006 Extracted: 09/05/200109:56 Analyzed 09/05/200109:56 <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 0.0851 0.0899 0.1000 0.1000 85.1 89.9 5.5 77-123 35 <br /> Toluene 0.0863 0.0915 0.1000 0.1000 86.3 91.5 5.8 78-122 35 <br /> Ethyl benzene 0.0874 0.0932 0.1000 0.1000 87.4 93.2 6.4 70-130 35 <br /> Xylene(s) 0.251 0.267 0.300 0.300 83.7 89.0 6.1 75-125 35 <br /> Surrogate(s) <br /> Trifluorotoluene 477 496 500 500 95.4 99.2 53-125 <br /> 1220 Quarry LanePleasanton,CA 94566-4756 <br /> Telephone:(925)484-1919'Facsimile:(925)484-1096 <br /> Printed on:09/07/2001 13:43 Page 17 of 21 <br />