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i t <br /> C H RO MALAB, INC. Submission # 2000-04-0352 <br /> Environmental Services(SDB) <br /> To Wright Environmental Services Inc Test Method 8260A <br /> Attn Maria Reid Prep Method 8260A <br /> Batch QC Report <br /> Fuel Oxygenates by GC/MS <br /> Laboratory Control Spike (LCS/LCSD) Water QC Batch #2000104/24-02 39 <br /> LCS 2000104124-02 39-002 Extracted 04/24/2000 13 02 Analyzed 04/24/2000 13 02 <br /> LCSD 2000104/24-02 39-003 Extracted 04/24/2000 13 31 Analyzed 04/24/2000 13 31 <br /> Compound Conc [ug/L] Exp Conc (ttg/L] Recovery[%] RPD Ctrl Limits(%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recovery I RPD LCS LCSD <br /> Methyl tert-butyl ether 487 510 500 500 974 1020 4 6 65-165 20 <br /> Surrogate(s) <br /> 1 2-Dichloroethane-d4 463 464 500 500 926 928 76-114 <br /> 1220 Quarry Lane"Pleasanton,CA 94566-4756 <br /> Telephone (925)484-1919"Facsimile (925)484-1096 <br /> Printed on 04/28/2000 14 50 Page 6 of 6 <br />