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C H ROMALAB INC. Submission#: 2000-03-0252 <br /> Environmental Services(SOB) <br /> To: CH2M Hill-Oakland Test Method: 8260A <br /> Attn: Keith Sheets Prep Method: 8260A <br /> Batch QC Report <br /> { <br /> Fuel Oxygenates by GUMS <br /> Laboratory Control Spike(LCSILCSD) Water QC Batch#2000/03115-01.06 <br /> LCS: 2000103115-01.06-002 Extracted: 03/15/2000 10:17 Analyzed 03/15/2000 10:17 <br /> LCSD: 2000103115-01.06-003 Extracted: 031151200010:44 Analyzed 03/151200010:44 <br /> Compound Conc. [uglL] Exp.Conc. [ug/L] Recovery PA] RPD Ctrl.Limits[°/4] Flags <br /> LCS LCSD LCS LCSD LCS LCSD 1%) Recovery RPD LCS LCSD I <br /> Mathyl tort-butyl ether 45.8 46.6 50.0 50.0 91.6 93.2 1.7 65-165 20 l <br /> Surrogate(s) <br /> I <br /> 1,2-Dichloroelhane-d4 391 433 500 500 78.2 86.6 76-114 <br /> I <br /> I <br /> f <br /> I <br /> I <br /> i <br /> i <br /> 1220 Quarry Lane•Pleasanton,CA 94566.475$ <br /> Telephone:(925)484-1919`facsimile:(9225)484-1096 <br /> Printed an:0311612000 13:09 Page 7 of 7 J <br /> .i <br /> I <br />