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C H ROMALAB, INC. Submission #: 19994 2.0355 <br /> Environmental Services(SDB) <br /> To: CH2M Hill-Oakland Test Method: 8260A <br /> Attin: Keith Sheets Prep Method: 8260A <br /> Batch QC Report <br /> Fuel Oxygenates by GUMS <br /> Matrix Spike(MS 1 MSD) Water QC Batch 91999112129-01.06 <br /> Sample ]D. CPT-1 (74') Lab Sample ID: 1999-12-0355-003 <br /> MS: 1999112129-01.06-004 Extracted:12/29/1999 22:19 Analyzed: 12/29/1999 22:19 Dilution: 1.0 <br /> MSD: 1999112129-01.06-005 Extracted:12/29/1999 22:46 Analyzed:, 12/29/1999 22:46 Dilution: 1.0 <br /> Compound Cone [ug/L] Ex .Conn [ug/L Recovery % RPD Ctrl.Limits[%] Flags <br /> MS MSD Sample MS MSD MS MSD 1%] RecoveryRPD MS MSD <br /> Methyl tart-butyl ether 49.4 46.7 ND 50.0 50.0 98.8 93.4 5.6 65-165 20 <br /> Surrogates) <br /> 1,2-Dichloroethene-d4 478 469 500 500 95.6 93.8 76-114 <br /> r ' <br /> I <br /> l <br /> ti <br /> i <br /> s <br /> i <br /> �. 1220 Quarry LanePleasanton,CA 94566-4756 <br /> f Telephone.(925)484-1919•Facsimile:(925)484-1096 <br /> }+ printed on:06101!2000 16:23 <br /> page 8 Of 9 r. '. <br />