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C H RO MALAB, INC. Submission #: 2000-12-0334 <br /> Environmental-Services(SDB) <br /> To: P.G.&E-SF Environmental Support&Service Test Method: 8260A <br /> Attn.: Gary'Pforr Prep Method: 5030 i <br /> Batch QC Report <br /> MTBE-Volatile Organics by GC/MS <br /> Matrix Spike( MS I MSD) Soil QC Batch #2 0 0 011 211 8-V1.27 <br /> Sample ID: DS3-5-W Lab Sample ID:2000-12-0334-003 <br /> MS: 2000/12118-V1.27-009 Extracted:12/18/2000 23:53 Analyzed: 12/18/2000 23:53 Dilution: 1.0 <br /> MSD: 2000/12/18-V1.27-010i*xtracted:12/19/2000 00:23 Analyzed: 12/19/200000:23 Dilution: 1.0 <br /> Compound Conc. [ug/Kg] Exp.Conc. [ug/Kg] Recovery[% RPD Ctrl.Limits[%a] Flags <br /> MS MSD Sample. MS MSD MS TMSD [%] Recovery RPD MS MSD <br /> MTBE 91.1 89.5 ND 97.3 96.3 93.6 92.9 0.8 65-165 20 <br /> Surrogate(s) <br /> 1,2-Dichloroethane-d4 418 435 500 500 83.6 87.0 70-121 <br /> I <br /> I <br /> I <br /> i <br /> I <br /> i <br /> I <br /> 1220 Quarry LanePleasanton,CA 94566-4756 <br /> Telephone:(925)484-1919`Facsimile:(925)484-1096 <br /> Printed on:12/19/2000 11:40 Page 11 of 12 <br />