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C H ROMALAB, INC. Submission #: 2000-03-0228 <br /> Environmental Services(SDB) <br /> To Wright Environmental Services Inc Test Method 8260A <br /> Attn John Lynch Prep Method 8260A <br /> Batch QC Report <br /> Fuel Oxygenates by GC/MS <br /> Laboratory Control Spike(LCS/LCSD) Water QC Batch #2000/03/21-0106 <br /> LCS 2000103121-01 06-002 Extracted 03/21/2000 09 51 Analyzed 03/21/2000 09 51 <br /> LCSD 2000103121-0106-003 Extracted 03121120001113 Analyzed 03121120001113 <br /> Compound Conc [ug/L] Exp Conc [ug/L] Recovery[%] RPD Ctrl Limits[%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD 1%] Recovery I RPO LCS LCSD <br /> Methyl tert-butyl ether 407 463 500 500814 92 6 129 65-165 20 <br /> Surrogates} <br /> 1,2-Dichloroethane-d4 394 426 500 500 788 852 76-114 <br /> • <br /> 1220 Quarry Lane'Pleasanton,CA 94566-4756 <br /> Telephone (925)484-1919'Facsimile (925)4841096 <br /> Printed on 03/22/2000 11 55 Page 11 of 13 <br />