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CHROMALAB, INC. Submission P 2000-07-0428 <br /> Environmental Services(SDB) <br /> To Wright Environmental Services Inc Test Method 8260B <br /> Attn Chns Palmer Prep Method 82608 <br /> Batch QC Report <br /> Fuel Oxygenates by 8260B <br /> Laboratory Control Spike (LCSILCSD) Soil QC Batch #2000/07/31-02 27 <br /> LCS 2000107131-02 27-002 Extracted 07/31/2000 21 47 Analyzed 07/31/2000 21 47 <br /> LCSD 2000107131-02 27-003 Extracted 07/31/2000 22 16 Analyzed 07/31/2000 22 16 <br /> Compound Conc [ug/Kg] Exp Conc [ug/Kg) Recovery[%] RPE) Ctrl Limits[%] Flags <br /> LCS LCSD LCS LCSD LCS I LCSD 1 I%] Recovery RPD LCS LCSD <br /> Methyl tert-butyl ether 222 239 250250 88 8 95 6r765-165 20 <br /> Surrogate(s) <br /> 1 2-Dichloroethane-d4 471 475 500500 94 2 95 070-121 <br /> 1220 Quarry Lane'Pleasanton CA 94566-4756 <br /> Telephone (925)484-1919'Facsimile (925)484-1096 <br /> Printed on 08/06/2000 21 35 Page 14 of 17 <br />