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C H ROMALAB, INC. Submission #: 1999-12-0377 <br /> Environmental Services(SDB) <br /> To: CH2M Hill-Oakland Test Method: 6020 ` <br /> 8015M <br /> Attn: Keith Sheets Prep Method: 5030 <br /> Batch QC Report f <br /> Gas/BTEX <br /> 1 <br /> Laboratory Control Spike(LCS/LCSD) Water OC Batch#1999112129-01.02 ? <br /> LCS: 1999/12/29-01.02-002 Extracted: 12/29/1999 05:57 Analyzed: 12/29/1999 05:57 <br /> LCSD: 1999112/29-01.02-003 Extracted: 12/29/1999 06:26 Analyzed: 12/29/1999 06:26 !" <br /> Compound Conc. [ug/L Ex .Conc. o <br /> ] p [uglL] Recovery[/o RPD Ctrl. Limits[/o] Flags <br /> LCS LCSD. LCS LCSD LCS LCSD Recovery RPD LCS LCSD <br /> Gasoline 540 588 500 500 108.0 117.6 8.5 75-125 20 <br /> Benzene 87.6 87.2 100.0 100.0 87.6 87.2 0.5 77-123 20 <br /> Toluene 84.1 86.8 100.0 100.0 84.1 86.8 3.2 78-122 20 <br /> Ethyl benzene 83.8 86.9 100.0 100.0 83.8 86.9 3.6 70-130 20 <br /> Xylene(s) 249 263 300 300 83.0 87.7 5.5 75-125 20 <br /> Surrogate(s) <br /> Trifluorotoluene 366 360 500 500 73.2 72.0 58-124 <br /> 4-Bromofluorobenzene-Fl 508 494 500 500 101.6 98.8 50-150 �. <br /> { <br /> i <br /> i <br /> l <br /> r; <br /> 1220 Quarry LanePleasanton,CA 94566-4756 <br /> Telephone:(925)4841919'Facsimile:(925)484-1096 . <br /> Printed on:01/03/2000 15:10 Page 19 of 20 <br /> . i <br />