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CHROMALAB, INC. Submission # 2000-03.0228 <br /> Environmental Services(SOB) <br /> • To Wright Environmental Services Inc Test Method 8260A <br /> Attn Jahn Lynch Prep Method 8260A <br /> Batch QC Report <br /> Fuel Oxygenates by GC/MS <br /> Matrix Spike( MS 1 MSD ) Water QC Batch#2000103121-01 06 <br /> Sample ID MW-4 Lab Sample ID 2000-03-0301-007 <br /> MS 2000103121-01 06-004 Extracted 03/21/2000 19 49 Analyzed 03/21/2000 19 49 Dilution 1 0 <br /> MSD 2000103121-01 06-005Extracted 03/21/2000 20 16 Analyzed 03/21/2000 2016 Dilution 1 0 <br /> Compound Conc. [ug/L] I Exp Conc I v IL] Recove [% RPD Ctrl Limits[%] I Flags <br /> �Ms MSD (Sample I MS I MSD MS I MSD [%] I Recoveryl RPD I MS MSD <br /> Methyl tort-butyl ether 500 435 NO 500 500 1000 870 139 65-165 20 <br /> Surrogate(s) <br /> 1 2-Dichloroethane-d4 462 436 500 500 924 872 76-114 <br /> • <br /> 1220 Quarry Lane'Pleasanton,CA 94566-4756 <br /> Telephone (925)484-1919`Facsimile (925)484-1096 <br /> Printed on 03122!2000 11 55 Page 12 of 13 <br />