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C H R4 MALA B, 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 1 MSD )' Soil QC Batch# 1999/08/04-01 04 <br /> Sample ID B-3-25'-25 5' Lab Sample ID 1999-08-0026-018 <br /> MS 1999108104-01 04-004 Extracted 08/04/1999 11 58 Analyzed 08/04/1999 11 58 Dilution 10 <br /> MSD 1999108104-01 04-005 Extracted 08/04/1999 14 28 Analyzed 08/04/1999 14 28 Dilution 1 0 <br /> Compound Conc [mg/Kg] Exp Conc mglKg] Recove % RPDCtrl Limits[%] Flags i <br /> MS I MSD Sample MS I MSD MS MSD [%] Recovery) RPD MS MSD <br /> Gasoline 0 309 0 358 NO 0 469 0 445 659 804 198 65-135 35 <br /> Benzene 00660 0 0600 ND 00938 00890 704 674 4 4 65-135 35 <br /> Toluene '0 0660 00600 NO 00938 00890 704 674 4 4 65-135 35 <br /> Ethyl benzene 00660 0 0600 IND 00938 00890 704 674 4 4 65-135 35 <br /> Xylene(s) 10198 0 179 NO 0 281 0 267 705 670 51 65-135 35 <br /> Surrogate(s) <br /> Tnfluorotoluene -408 398 500 500 81 6 7961 1 53-125 <br /> 4-Bromofluorobenzene- 1300 325 500 500 60 0 65 0 58-124 --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 35 of 37 <br />