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C H ROMALAB, INC. Submission #: 1999 12-0355 <br /> Environmental Services(SDB) <br /> To: CH2M Hill-Oakland Test Method: 8260A <br /> Attn: Keith Sheets Prep Method: 8260A <br /> Batch OC Report <br /> Fuel Oxygenates by GCIMS <br /> Laboratory Control Spike(LCS/LCSD) Water OC Batch#9999112/29-01.06 <br /> LCS: 1999112129-01.06-002 Extracted: 121291199916:07 Analyzed 121291199916:07 <br /> LCSD: 1999/12129-01.06-003 Extracted: 121291199916:34 Analyzed 121291199916:34 <br /> Compound Conc. [ugJL] Exp.Conc. [ug/L] Recovery[° RPD Ctrl.Limits[%) Flags <br /> LCS LCSD LCS LCSD LCS LCSD [°,,) Recovery RPD LCS LCSD l <br /> Methyl tert butyl ether 52.0 56.1 50.0 50.0 104.0 112.2 7.6 65-165 20 <br /> surrogate(s) <br /> 1,2-Dichloroethene-d4 474 492 500 500 94.8 98.4 76-114 1` <br /> r <br /> 7 <br /> f <br /> i <br /> I <br /> I <br /> i <br /> I <br /> { <br /> 1220 Quarry Lane•Pleasanton,CA 94566-4756 <br /> Telephone:(925)484-1919'Facsimile:(925)484-1096 i4 <br /> Printed on:06/01/2000 96:23 Page 7 of 9 <br />