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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 1 MSD ] Soil QC Batch#1999108104-01 01 <br /> Sample ID SS-W Lab Sample ID 1999-08-0044-002 <br /> MS 1999108104-01 01-004 Extracted 08/05/1999 13 44 Analyzed 08/05/1999 13 44 Dilution 1 0 <br /> MSD 1999108104-01 01-005 Extracted 08/05/1999 18 37 Analyzed 08/05/1999 18 37 Dilution 1 0 <br /> /Compound Cone [mg/Kg] Exp Cone [mg/Kg] Recovery[%I RPD Ctrl Limits [%] Flags <br /> MS MSD ISample MS MSD MS MSD (%] Recovery RPD MS MSD <br /> Gasoline 0 184 0 196 ND 0 453 0 478 406 410 10 65-135 35 mso mso <br /> Benzene 00530 00510 ND 00906 00956 585 53 3 9 3 65-135 35 mso mso <br /> Toluene 100520 00410 ND 00906 00956 574 429 289 65-135 35 mso mso <br /> Ethyl benzene 00330 0 0320 ND 10901 009,56 364 33 5 8 3 65-135 35 mso mso <br /> Xylene(s) 00960 00910 ND 0 272 0 287 353 31 7 107 65-135 35 mso mso <br /> Surrogate(s) <br /> Tnftuorotoluene 1 232 216 500 500 46 4 432 53-125 sl sl <br /> 4-Bromofluorobenzene- 228 500 456 58-124 _ sl — <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 36 of 37 <br />