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STL Chromc-1111.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 #2001/09/02-01.01 <br /> LCS: 2001/09/02-01.01-004 Extracted: 09/02/200111:54 Analyzed 09/02/200111:54 <br /> LCSD: 2001/09/02-01.01-005 Extracted: 09/02/200112:24 Analyzed 09/02/200112:24 <br /> Compound Conc. [mg/Kg] Exp.Conc. [mg/Kg] Recovery [%] RPD Ctrl. Limits[%] I Flags <br /> LCS LCSD LCS LCSD LCS I LCSD [%] Recovery RPD I LCS LCSD <br /> Benzene 0.104 0.108 0.1000 0.1000 104.0 108.0 3.8 77-123 35 <br /> Toluene 0.106 0.111 0.1000 0.1000 106.0 111.0 4.6 78-122 35 <br /> Ethyl benzene 0.105 0.110 0.1000 0.1000 105.0 110.0 4.7 70-130 35 <br /> Xylene(s) 0.310 0.326 0.300 0.300 103.3 108.7 5.1 75-125 35 <br /> Surrogate(s) <br /> Trifluorotoluene 540 564 500 500 108.0 112.8 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 9 of 11 <br />