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STL ChromaLab Submission #: 2001-09-0185 <br /> !n Environmental Services(CA 1094) <br /> To: San Joaquin Company,Inc. Test Method: 8260B <br /> Attn: Dai Watkins Prep Method: 5030B <br /> f -- Batch QC Report <br /> Fuel Oxygenates by 8260B <br /> Laboratory Control Spike(LCS/LCSD) Water QC Batch#2001109112-01.27 <br /> LCS: 2001109/12-01.27-003 Extracted: 09/12/2001 12:35 Analyzed 09/12/2001 12:35 <br /> LCSD: 2001109112-01.27-004 Extracted: 09112/200113:02 Analyzed 091121200113:02 <br /> Compound Conc. [uglL] Exp.Conc. [ug/L] Recovery[%] RPO Ctrl. Limits[%] Flags <br /> LCS I LCSD LCS LCSD LCS LCSD 1%] Recovery RPD LCS LCSD <br /> I Methyl tent-butyl ether 21.2 19.3 25.0 25.0 84.8 77.2 9.4 65-165 20 <br /> 4 Surrogate(s) <br /> -' 1,2-Dichloroethane-d4 440 422 500 500 88.0 84.4 76-114 <br /> i <br /> i <br /> -'i <br /> ; i <br /> 1220 Quarry Lane'Pleasanton,CA 94566-4756 <br /> Telephone:(925)484-1919Facsimile.(925)484-1096 <br /> Printed on:09113/2001 12:11 Page 10 of 12 <br /> i� 1 <br />