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C H RQ MALAB, INC. Submission # 1999-05-1062 <br /> Environmental Services(SDB) <br /> To Aqua Science Engineers, Inc Test Method 8260A <br /> Attn Greg Schramn prep Method 8260A <br /> Batch QC Report <br /> Fuel Oxygenates by 8260A <br /> Matrix Spike ( MS 1 MSD ) Water QC Batch # 1999105117-01 09 <br /> Sample ID MW-1 Lab Sample ID 1999-05-1047-001 <br /> MS 1999105117-01 09-004 Extracted 05/17/1999 17 58 Analyze 05/17/1999 17 58 Dilution 1 0 <br /> MSD 1999105117-01 09-005 Extracted 05/17/1999 18 25 Analyze 05/17/1999 18 25 Dilution 1 0 <br /> Compound Conc (ug/L Added Recovery% RPD I Control Limits% Flags <br /> MS MSD Sample ; Amount MSi MSD Recovery RPD MS MSD <br /> Methyl tent-butyl ether 545 493 ND 50 I 109 0 98 6 25 65-165 20 <br /> *PFdgafe(s) <br /> 1 2-Dichloroethane-d4 71425 52709 500 j 1429{i 1054 76-114 <br /> 1220 Quarry Lane'Pleasanton California 94566-4756 <br /> Telephone (925)484-1919'Facsimile (925)484-1096 <br /> Printed On 05/19/1999 14 53 Page 10 of 11 <br />