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Sequoia 1455 McDowell Blvd North Ste D <br /> Petaluma CA 94954 <br /> (707)792-1865 <br /> Analytical <br /> FAX(707)792-0342 <br /> Project UnocaUTosco Sampled 4/9/99 <br /> lio, <br /> gital Dr Suite 6 Project Number Tosco SS#5886/205503 T8 Received 4/14/99 <br /> CA 94949 Project Manager Glenn Mattuecci Reported 5/24/99 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015W8020M/QuaCtty Control <br /> Sequoia Analytical-Petaluma, <br /> Date Spike Sample QC Reporting Linut Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Lumt % Notes* <br /> Match 9040563 Date Prepared 4/23/99 Extraction Method EPA 5030 soils <br /> lank 9040563-BLKI <br /> Gasoline 4/23/99 ND mg/kg 0 400 <br /> �nzene ND 000200 <br /> luene ND 000200 <br /> Ethylbenzene ND 000200 <br /> ylenes(total) ND 000400 <br /> ethyl tert-butyi ether - ND 00100 <br /> Wrrogate a a a-Trifluorotoluene 0 300 0 288 650-135 960 <br /> Surrogate 4-Bromofluorobenzene 0 300 0 283 650-135 943 <br /> ka <br /> 5 9040563-BSI <br /> oline 4/23/99 200 192 mg/kg 650-135 960 <br /> Surrogate 4-Bromofluorobenzene If 0 300 0 283 650-135 943 <br /> x S ike 9040563-MSI P904509-06 <br /> line 4/23/99 200 ND l 35 mg/kg 650-135 675 <br /> .lrrogate 4-Bromofluorobenzene 0 300 0195 It 650-135 650 <br /> atnx Spike Dnp 9040563-MSDI P904509-06 <br /> Gasoline 4/23/99 200 ND 1 34 mg/kg 650-135 670 350 0 743 <br /> �rrogate 4-Bromofluorobenzene 0 300 0 184 650-135 613 2 <br /> 1 <br /> 1 <br /> is Analytical-Petaluma *Refer to end of report for text of notes and definitions <br /> 1 Page 3 of 6 <br />