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j <br /> ` CHROMALAB, INC. Submission #: 2000-03-0366 <br /> Environmental Services(SDB) <br /> To: CH2M Hili-Oakland Test Method: 8015M <br /> 8020 <br /> Attn: Keith Sheets Prep Method: 5030: <br /> Batch QC Report <br /> GasIBTEX <br /> Laboratory Control Spike(LCSILCSD) Water QC Batch#2000103125-01.05 <br /> LCS: 2000103125-01.05-005 Extracted: 03/26/2000 07:55 Analyzed 03/26/2000 07:55 <br /> LCSD: 2000103125-01.05-006 Extracted: 03/26/2000 08:27 Analyzed 03/26/2000 08:27 <br /> Compound Conc. [uglL] Exp.Conc. [ug/L] Recov"LCSD <br /> RPD Ctrl.Limits[°k] Flags <br /> LCS. LCSD LCS LCSD LCS [%] Recovery RPD LCS LCSD <br /> Gasoline 442 473 500 500 88.4 94.6 6.8 75-125 20 <br /> Benzene 75.7 74.4 100.0 100.0 75.7 74.4 1.7 77-123 20 <br /> Toluene 77.6 74.8 100.0 100.0 77.6 74.8 3.7 78-122 20 <br /> Ethyl benzene 77.3 74.0 100.0 100.0 77.3 74.0 4.4 70-130 20 <br /> Xylene(s) 236 227 300 300 78.7 75.7 3.9 75-125 20 <br /> Surrogate(s) <br /> Trifluorotoluene 339 333 500 500 67.8 66.6 58-124 <br /> 4-Bromofluorobenzene-FI 449 472 500 500 89.8 94.4 50-150 <br /> it <br /> i - <br /> i <br /> 1 <br /> i <br /> II <br /> I <br /> 1220 Quarry Lane"Pleasanton,CA 94566-4756 <br /> ITelephone:(925)4841919'Facsimile:(925)484-1096 <br /> Printed on:03/28/2000 17:17 <br /> Page 5 Of 6 <br />