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i <br /> C H ROMALAB, INC. Submission #: 2000-03-0352 <br /> Environmental Services(SDB) <br /> To: Wright Environmental Services Inc Test Method: 8015M <br /> 8020 <br /> Attn:. John Lynch Prep Method: 5030 <br /> Batch QC Report <br /> Gas/BTEX <br /> Laboratory Control Spike (LCS/LCSD) Sol[ QC Batch#2000/03/29-01.02 <br /> LCS: 2000/03/29-01.02-002 Extracted: 03/29/2000 04:30 Analyzed 03/29/2000 04:30 <br /> t <br /> LCSD: 2000/03/29-01.02-003 Extracted: 03/29/2000 05:01 Analyzed 03/29/2000 05:01 <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 /> Gasoline 0.527 0.501 0.500 0.500 105.4 100.2 5.1 75-125 35 <br /> Benzene 0.0927 0.0840 0.1000 0.1000 92.7 84.0 9.8 77-123 35 <br /> Toluene 0.0892 0.0844 0.1000 0.1000 89.2 84.4 5.5 78-122 35 <br /> Ethyl benzene 0.0891 0.0866 0.1000 0.1000 89.1 86.6 2.8 70-130 35 <br /> i <br /> Xylene(s) 0.265 0.260 0.300 0.300 88.3 86.7 1.8 75-125 35 <br /> Surrogate(s) <br /> Trifluorotoluene 437 406 500 500 87.4 81.2 53-125 <br /> 1220 Quarry Lane'Pleasanton,CA 94566-4756 <br /> Telephone:(925)484-1919'Facsimile:(925)484-1096 <br /> .Printed on:03/29/2000 18:02 Page 12 of 12 <br />