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CHROMALAB, INC. Submission #: 2000-08-0204 <br /> Environmental Services(SDB) <br /> To: R.B. Construction Test Method: 8020 <br /> 8015M <br /> Attn: Mike Kriss Prep Method: 5030 <br /> Batch QC Report <br /> Gas/BTEX <br /> Laboratory Control Spike(LCS/LCSD) Soil QC Batch#2000/08/11-01.04 <br /> LCS: 2000/08/11-01.04-002 Extracted: 08/11/2000 09:56 Analyzed 08/11/2000 09:56 <br /> LCSD: 2000/08/11-01.04-003 Extracted: 08/11/200010:24 Analyzed 08/11/200010:24 <br /> Compound Conc. - [mg/Kg] Exp.Conc. [mg/Kg] Recovery[6 RPD Ctd.Limits[%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [°k] Recovery RPD LCS LCSD <br /> Gasoline 0.418 0.530 0.500 0.500 83.6 106.0 23.6 75-125 35 <br /> Benzene 0.0637 0.0770 0.1000 0.1000 83.7 77.0 8.3 77-123 35 <br /> Toluene 0.0852 0.0785 0.1000 0.1000 85.2 78.5 8.2 78.122 35 <br /> Ethyl benzene 0.0850 0.0780 0.1000 0.1000 85.0 78.0 8.6 70-130 35 <br /> Xylene(s) 0.249 0.230 0.300 0.300 83.0 76.7 7.9 75-125 35 <br /> Surrogate(s) <br /> Trifluorotoluene 450 404 500 500 90.0 80.8 53.125 <br /> Trifluorotoluene-FID 336 398 500 500 67.2 79.6 53-125 <br /> 1220 Quarry LanePleasanton,CA 945664756 <br /> Telephone:(925)484-1919'Facsimile:(925)484-1096 <br /> Printed on:0822/2000 09:42 Page 9 of 10 <br />