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C H RO MALAB, INC. Submission #: 1999-08-0026 <br /> Environmental Services(SDB) <br /> To URS Greiner Woodward Clyde- Oakland Test Method 8015M <br /> 8020 <br /> Attn Al Ridley Prep Method 5030 <br /> Batch QC Report <br /> Volatile Hydrocarbons by 8015/8020 <br /> Matrix Spike ( MS/MSD ) Sol] - QC Batch# 9999/08/03-01 01 <br /> Sample ID #2 Lab Sample ID 1999-08-0010-001 <br /> MS 1999/08/03-01 01-004 Extracted 08/03/1999 13 49 Analyzed 08/03/1999 13 49 Dilution 10 <br /> MSD 1999/08/03-01 01-005 Extracted 08/03/1999 16 05 Analyzed 08/03/1999 16 05 Dilution 10 <br /> Compound Conc [mg/Kg] Exp Conc mg/Kg I mg/KRecovery % RPD Ctrl Limits [%] Flags _ <br /> �Ms I MSD Sample I MS I MSD MS I MSD (%] Recovery RPD MS MSD <br /> Gasoline 0 365 0 427 ND 0 477 0 493 765 866 124 65-135 35 <br /> Benzene 00770 00599 ND 00954 00986 807 608 281 65-135 35 mso <br /> Toluene 100770 00560 ND 00954 00986 807 568 348 65-135 35 mso <br /> Ethyl benzene 0 0760 100550 ND 00954 00986 797 558 353 65-135 35 mso <br /> Xylene(s) 0 224 0 165 ND 0 286 0 296 783 557 337 65-135 35 mso <br /> Surrogate{s} <br /> TnFluorotoluene 378 292 500 500 756 584 53-125 <br /> 4-Bromottuorobenzene- 311 366 500 500 622 732 58-124 <br /> i <br /> 1220 Quarry Lane'Pleasanton,CA 94566-4756 <br /> Telephone (925)484-1919*Facsimile (925)484-1096 <br /> Printed on 08/27/1999 14 00 Page 34 of 37 <br />