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1 <br /> C H RO MALAB, INC. Submission #: 2000-03-0366 <br /> Environmental Services(SDB) <br /> To: CH2M Hill-Oakland Test Method: 8260A <br /> Attn: Keith Sheets Prep Method: 8260A <br /> Batch QC Report <br /> I - <br /> Fuel Oxygenates by GC/MS <br /> Laboratory Control Spike(LCS/LCSD) Water QC Batch#2000103124-02.39 <br /> LCS: 2000103124-02.39-002 Extracted: 03/24/2000 23:30 Analyzed 03/24/2000 23:30 <br /> LCSD: 2000/03/24-02.39-003 Extracted: 03/25/2000 00:29 Analyzed 03/2512000 00.29 <br /> Compound Cone. [ug/L] Exp.Conc. [uglL] Recovery RPD Ctrl.Limits(%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%) Recovery RPD LCS LCSD <br /> Methyl tart-butyl ether 57.7 58.9 50.0 50.0 115.4 117.8 2.1 65-165 20 <br /> Surrogate(s) <br /> 1,2-Dichloroethane-d4 494 505 500 500 98.8 101.0 76-114 <br /> r <br /> I ' <br /> r <br /> i <br /> r <br /> 1220 Quarry LanePleasanton,CA 94566-4756 <br /> Telephone:(925)484-1919•Facsimile:(925)484-1096 <br /> Printed on:03/27/2000 10:03 Page 5 Of 6 <br />