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CHROMALAB, INC. Submission #: 2000-03-0220 <br /> Environmental Services(SDB) <br /> To: CH2M Hill-Oakland Test Method: 8015M <br /> 8020 { <br /> Attn: Keith Sheets . Prep Method: 5030 <br /> Batch QC Report <br /> Gas/BTEX <br /> E <br /> Laboratory Control Spike(LCS/LCSD) Water QC Batch#2000/03113-01.01 <br /> LCS: 2000103113-01.01-002 Extracted: 03/13/2000 06:46 Analyzed 03/13/2000 06:46 <br /> LCSD: 2000103113-01.01-003 Extracted: 03/13/2000 07:21 Analyzed 03/13/2000 07:21 <br /> Compound Cone. [ug/L] Exp.Conc. [ug1L] Recovery[%] RPD Ctrl.Limits[%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD I [%] Recovery RPD LCS LCSD <br /> Gasoline 490 478 500 500 98.0 95.61 2.5 75-125 20 <br /> Benzene 93.4 90.9 160.0 100.0 93.4 90.9 2.7 77-123 20 r <br /> Toluene 92.3 89.6 100.0 100.0 92.3 89:6 3.0 78-122 20 <br /> Ethyl benzene 92.9 90.9 100.0 100-0. 92.9 90.9 2.2 70-130 20 <br /> Xylene(s) 279 271 300 300 93.0 90.3 2.9 75-125 20 <br /> Surrogate(s) <br /> TriBuorotoluene 440 432 500 500 88.0 86.4 58-124 <br /> 4-Bromofluorohenzene-Fi 461 445 500 504 92.2 89.0 50-150 <br /> l <br /> 1 <br /> i <br /> { <br /> I <br /> f <br /> 1220 Quarry Lane•Pleasanton.CA 94566-4756 <br /> Telephone:(925)484-1919"Facsimile:(925)484-1096 <br /> Printed on:03/14/2000 16:52 Page 5 of 5 <br /> _I <br />