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CHROMALAB, INC. <br /> 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) Soil QC Batch#2000/03/28-01.04 <br /> LCS: 2000/03/28-01.04-002 Extracted: 03/28/2000 07:49 Analyzed 03/28/2000 07:49 <br /> LCSD: 2000/03/28-01.04-003 Extracted: 03/28/200010:09 Analyzed 03/28/200010:09 <br /> Compound Conc. [mg/Kg] Exp.Conc. [mg/Kg] Recovery[%] RPD Ctrl.Limits[%] I Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recovery RPD LCS LCSD <br /> Gasoline 0.453 0.474 0.500 0.500 90.6 94.8 4.5 75-125 35 1 <br /> Benzene 0.0790 0.0821 0.1000 0.1000 79.0 82.1 3.8 77-123 35 <br /> Toluene 0.0794 0.0832 0.1000 0.1000 79.4 83.2 4.7 78-122 35 <br /> Ethyl benzene 0.0787 0.0825 0.1000 0.1000 78.7 82.5 4.7 70-130 35 <br /> Xylene(s) 0.239 0.249 0.300 0.300 79.7 83.0 4.1 75-125 35 <br /> i <br /> Surrogate(s) <br /> Trifluorotoluene 363 385 500 500 72.6 77.0 53-125 <br /> 4-Bromofluorobenzene-FI 491 505 500 500 98.2 101.0 58-124 <br /> V <br /> 1220 Quarry Lane'Pleasanton,CA 94566-4756 <br /> Telephone:(925)484-1919Facsimile:(925)4841096 <br /> Printed on:03/29/2000 18:02 Page 11 of 12 <br />