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i <br /> Submission #: 2401-08.0190 <br /> STL ChromaLab <br /> Environmental Services(CA 1094) <br /> To, CH2M Hill-Oakland Test Method: 82606 <br /> Attn.: Keith Sheets Prep Method: 50306 <br /> Batch QC Report <br /> Fuel Oxygenates by 8260E(Low Level) <br /> Matrix Spike(MS!MSD) Water QC Batch#2001108114•V2.27 <br /> Sample ID: CPT-22(64') Lab Sample ID: 2001-08-0190-002 <br /> MS: 200110811442.27-021 Extracted:081.1412001 18:54 Analyzed: 08/14/2001 18:54 Dilution: 1.0 <br /> MSD: 2001108114-V2.27-022Extracted:0811412001 19:19 Analyzed: 08/14/2001 19:19 Dilution: 1.0 <br /> Compound Cona [ug/L] F-xp.Conc. j u IL Recovery(% RPD Ctrl,Limits[9/o] Flags <br /> MS MSD $ample MS MSD MS MSD [%] Recovery RPD MS MSD <br /> Methyl tart-butyl ether 24.3 23.5 ND 25 25 97.2 94.0 3.3 65-165 20 <br /> Surrogate(s) <br /> 1,2-Dlchloroelh2n9-d4 659 648 500 500 131.8 129.6 78-114 sh sh <br /> I <br /> I <br /> I <br /> 1220 Quarry Lane•Pleasanton,CA 94566-4756 <br /> Telephone:(925)484-1919*Facsimile:(925)484-1096 <br /> Printed on:08120/2001 17:43 Page 8 Of 9 <br />