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STL ChromaLab Submission#: 2001-08•0154 <br /> Environmental Services(CA 1094) <br /> To: CH2M HETI-Oakland Test Method: 8260E i <br /> Attn.: Keith Sheets Prep Method: 5030E <br /> Batch QC Report <br /> Fuel Oxygenates by 8260B (Low Level) <br /> Matrix Spike(MS 1 MSD) Water QC Batch#2001108110-01.27 <br /> Sample ID: CPT-18(74') Lab Sample ID:2001-08-0154-001 <br /> MS: 2001108110-01.27-006 Extracted:08/10/2001 13,40 Analyzed: 08/10/2001 13:40 Dilution: 1.0 <br /> MSD: 2001108/10-01.27-007 Extracted:08/10/200114:04 Analyzed: 081101200114:04 Dilution: 1.0 <br /> Compound Conc [ug/L] Ex .Conc. u IL lRecove % RPD Ctrl.Limits[%] Flags <br /> MS MSD Sample MS MSD I MS I MSD [%] Recovery RPD MS MSD { <br /> Methyl tent-butyl ether 19.1 21.9 ND 25.0 25.0 76.4 87.6 13.7 65-165 20 <br /> Surrogate(s) <br /> 1,2-Dichloroethane-d4 524 532 500 500 104.8 106.4 76-114 Z <br /> f <br /> i <br /> I <br /> I_. <br /> y <br /> 1220 Quarry Lane*Pleasanton,CA 94566-4756 <br /> Telephone:(925)484-1919*Facsimile:(925)484-1096 <br /> Printed on:08/13/2001 08:03 Page 11 of 11 <br />