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1455 McDowell Blvd.North,Ste.D <br /> Sequoia Petaluma,CA 94954 <br /> (707)792-1865 <br /> FAX(707)792-0342 <br /> V„r Analytical www.sequoialabs.com <br /> Cambria Environmental Project: Equiva Sampled: 7/31/00 <br /> 270 Perkins St. Project Number: 7700 Moreland Ct,Stockton Received: 7/31/00 <br /> Sonoma,CA 95476 Project Manager: Scott Lewis Reported: 8/15/00 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M/80201WQuality Control" <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov.Limits % Limit % Notes* <br /> Batch: 0080308 Date Prepared: 8/14/00 Extraction Method: EPA 5030 soils <br /> Blank 0080308-BLKI <br /> Gasoline 8/14/00 ND ug/kg 1000 <br /> Benzene ND 5.00 <br /> Toluene ND 5.00 <br /> Ethylbenzene ND 5.00 <br /> Xylenes(total) ND 5.00 <br /> Surrogate: a,a,a-Trifluorotoluene 600 613 65.0-135 102 <br /> Surrogate: 4-Bromofluorobenzene 600 603 65.0-135 101 <br /> LCS 0080308-BS1 <br /> Gasoline 8/14/00 2000 1970 ug/kg 65.0-135 98.5 <br /> Surrogate: 4-Bromofluorobenzene It600 620 65.0-135 103 <br /> Matrix Spike 0080308-MS1 P008125-01 <br /> Gasoline 8/14/00 2000 ND 1720 ug/kg 65.0-135 86.0 <br /> Surrogate: 4-Bromofluorobenzene " 600 539 It <br /> 65.0-135 89.8 <br /> Matrix Spike Dup 0080308-MSDI P008125-01 <br /> Gasoline 8/14/00 2000 ND 1840 ug/kg 65.0-135 92.0 20.0 6.74 <br /> Surrogate: 4-Bromofluorobenzene 600 550 65.0-135 91.7 <br /> Sequoia Analytical-Petaluma *Refer to end of reportfor text of notes and definitions. <br /> Page 4 of 7 <br />