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STL ChromaLab Submission#: 2001-08.0154 <br /> Envtronmental Services(CA 1094) <br /> To: CH2M Hili-Oakland Test Method: 8015M <br /> Attn: Keith Sheets Prep Method: 5030 <br /> Batch QC Report <br /> Gas/BTEX by 8015MI8021 <br /> Laboratory Control Spike(LCSILCSD) Water QC Batch#200L <br /> 3 <br /> LCS: 2001108114-01.03-007 Extracted: 081141200109:52 Analyzed 08114/2LCSD: 2001/08/14-01.03-008 Extracted: 08114/200110:22 Analyzed 0811412 <br /> Compound Cone. [ug/L] Exp.Conc. [ug/L] Recovery[%] RPD Ctrl.limits[%] Flags <br /> LCS LCSD LCs LCSD LCS LCSD I%] Recovery RPD LCS LCSD <br /> Gasoline 495 516 500 500 99.0 103.2 4.2 75-125 20 <br /> Surrogate(s) <br /> 4-Bromofluorobenzene-FI 434 441 500 500 86.8 88.2 50-150 <br /> 1220 Quarry LanePleasanton,CA 94568-4758 <br /> Telephone:(925)484-1919•Facsimile:(925)4841096 i <br /> Printed on:08/1512001 17:27 <br /> Page 12 of 14 <br />