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CHROMALAB, INC. Submission #: 199942-0355 <br /> Environmental Services(SDB) <br /> To: CH2M Hill-Oakland <br /> Test Method: 8015M <br /> 8020 <br /> Attn: Keith Sheets Prep Method: 5030 <br /> Batch QC Report <br /> Gas/BTEX <br /> Laboratory Control Spike(LCSILCSD) Water QC Batch#1999112!26-01.05 <br /> LCS: 1999112128-01.05-002 Extracted. 12/281199913:35 Analyzed 121281199913:35 <br /> LCSD: 1999112128-01.05-003 Extracted: 121281199914:07 Analyzed 121281199914:07 <br /> Compound Conc. ]uglL] Exp.Conc. [uglL] Recovery[% RPD Ctrl.Limits[%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD 1%] Recovery RPD LCS LCSD <br /> Gasoline 551 485 500 500 110,21 97.01 12.7 75-125 20 <br /> Benzene 106 97.4 100.0 100.0 106.0 97.4 8.5 77-123 20 <br /> Toluene 95.2 85.2 100.0 100.0 95.2 85.2 11.1 78-122 20 <br /> Ethyl benzene 88.0 77.7 100.0 100.0 88,0 77.7 12.4 70-130 20 <br /> Xylene(s) 257 232 300 300 85.7 77.3 10.3 75-125 20 <br /> Surrogete(s) <br /> Trifluorololuene 478 423 500 500 95.6 84.6 58-124 <br /> 4-Bromofluorobenzene-FI 418 414 500 500 83.6 82.8 50-150 <br /> i <br /> I <br /> 1 <br /> j <br /> { <br /> 1220 Quarry Lane"Pleasanton,CA 94566-4756 <br /> i <br /> Telephone:(925)484-1919'.Facsimile:(925)484-1096 <br /> Printed on:06/01/2000 16:22 Page 17 Of 20 <br /> i <br />