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C H RO MALAB, INC. Submission #: 199942-0355 <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 i <br /> I <br /> Laboratory Control Spike(LCS/LCSD) Water QC Batch 01999112127-01.05 <br /> LCS: 1999112127-01.05-002 Extracted: 121271199912:32 Analyzed 12127/199912:32 <br /> LCSD: 1999/12127-01.05-003 Extracted: 12/271199913:37 Analyzed 121271199913:37 <br /> Compound Cone. [ug/L] Exp.Conc. . [ug/L] Recovery[% RPO Ctrl.Limits[%] Flags j <br /> LCS LCSD LCS LCSD LCS LCSD 1%) Recovery RPD LCS LCSD <br /> Gasoline 517 510 500 500 103.4 102.0 1.4 75-125 20 <br /> Benzene 110 105 100.0 100.0 110.0 105.0 4.7 77-123 20 <br /> Toluene 97.5 92.1 100.0 100.0 97.5 92.1 5.7 78-122 20 <br /> Ethyl benzene 90.2 84.0 100.0 100.0 90.2 84.0 7.1 70-130 20 <br /> f <br /> Xylene(s) 260 246 300 300 86.7 82.0 5.6 75-125 20 <br /> Surrogates) <br /> Trifluorotoluene 503 459 500 500 100.5 91.8 58-124 <br /> r <br /> 4-Bromofluorobenzene-FI 418 417 500 500 83.6 83.4 50-150 <br /> I <br /> ii <br /> 1220 Quarry LanePleasanton,CA 94566-4756 <br /> Telephone:(925)484-1919`Facsimile:(925)484-1096 " .I <br /> Printed on:06/01/2000 16:22 Page 16 of 20 <br /> { <br /> 'l <br />