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CHROMALAB, INC. Submission #: 2000-07-0090 <br /> Environmental Services(SDS) <br /> To: San Joaquin Company, Inc. Test Method: 8260B <br /> Attn: Dai Watkins Prep Method: 82608 <br /> - Batch QC Report <br /> Fuel Oxygenates 6y 8260B <br /> Laboratory Control Spike(LCS/LCSD) Water QC Batch#2000107111-01.27 <br /> LCS: 2000/07111-01.27-002 Extracted: 07111/200016:57 Analyzed 07111/200016:57 <br /> LCSD: 2000107/11-01.27-003 Extracted: 07/111200017:29 Analyzed 07/111200017:29 <br /> _ _ <br /> Compound Conc. [u /L Exp.Conc, jug/L] Recove /o RPaI Ctrl.Limits /o Flags _ <br /> LCS LCSD LCS LCSD LCS LCSD I%] !Recovery 'RPD LCS LCSD <br /> Methyl tent-bury!ether 46.6 46.2 50.0 50.0 93.2', 92.4 0.9 <br /> 65-165 20 <br /> Surrogate(s) <br /> 1,2-Dichloroethane-d4 485 476 500 500 97.0 95.2 76-114 <br /> 1220 Quarry Lane'Pleasanton,CA 94566-4756 <br /> Telephone:(925)484-1919'Facsimile:(925)484-1096 <br /> Printed on:0711712000 18:24 Page 5 of 5 <br />