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C H RO MA LAB, INC. Submission # 1999-08-0176 <br />' Environmental Services (SDB) <br /> To Aqua Science Engineers, Inc Test Method 8260A <br /> Attn Ian T Reed Prep Method 8260A <br /> Batch QC Report <br /> Fuel Oxygenates by GC/MS. <br />' Matrix Spike ( MS 1 MSD ) Water QC Batch # 1999108117-01 06 <br /> Sample ID MW-10 Lab Sample ID 1999-08-0176-010 <br /> MS 1999108117-01 06-004 Extracted 08/17/1999 17 52 Analyzed 08/17/1999 17 52 Dilution 1 0 <br /> MSD 1999108117-01 06-005 Extracted 08/17/1999 18 18 Analyzed 08/17/1999 18 18 Dilution 1 0 <br /> Compound Conc ug Exp Conc [ug/L] IRecovery[0 RPD I Ctrl Limits [%] Flags <br /> MS MSD Sample MS MSD MS MSD I Recoveryl RPD MS MSD <br /> Methyl tert butyl ether 310 301 ND 500 500 62 0 602 2 9 65-ifi5 20 <br /> Surrogate(s) <br /> 1,2-Dichloroethane-d4 378 392 500 500 75 6 j 784 76-114 sl <br /> 1 <br /> 1 <br /> 1220 Quarry Lane`Pleasanton,CA 94566-4756 <br /> Telephone (925)484-1919'f=acsimile (925)484-1096 <br /> Printed on 08/20/1999 18 12 Page 11 of 12 <br />