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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 /> Cambria Environmental Project: Shell Oil Co. Sampled: 9/29/99 <br /> 270 Perkins St. Project Number: 440 Charter,Stockton Received: 9/29/99 <br /> Sonoma,CA 95476 Project Manager: Tom Magney Reported: 10/11/99 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M/8020M/Quality 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: 9100007 Date Prepared: 10/1/99 Extraction Method: EPA 5030 soils <br /> Blank 9100007-BLK1 <br /> Gasoline 10/1/99 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 /> Methyl tert-butyl ether ND 50.0 <br /> Surrogate.- a,a,a-Trifluorotoluene 600 658 65.0-135 1/0 <br /> Surrogate: 4-Bromofluorobenzene 600 583 65.0-135 97.1 <br /> LCS 9100007-13S1 <br /> Gasoline 10/1/99 2000 __1850_ ug_!k_g 65.0-135 92.5 <br /> Surrogate: 4-Bromofluorobenzene 600 588 65.0-135 98.0 <br /> LCS 9100007-13S2 <br /> Benzene 10/1/99 200 194 ug/kg 65.0-135 97.0 <br /> Toluene 200 194 65.0-135 97.0 <br /> Ethylbenzene 200 189 65.0-135 94.5 <br /> Xylenes(total) 600 622 65.0-135 104 _ -__,-- <br /> Surrogate: a,a,a-Trifluorotoluene 600 646 65.0-135 108 <br /> Matrix Spike 9100007-NISI P909665-01 <br /> Gasoline 10/1/99 2000 ND_ _ 1030 ug/,kg 65.0-135 51.5 <br /> Surrogate: 4-Bromofluorobenzene of 600 3S6 65.0-135 59.3 <br /> Matrix Spike 9100007-MS2 P909665-01 <br /> Benzene 10/1/99 200 ND 256 ug/kg 65.0-135 128 <br /> Toluene 200 ND 233 65.0-135 117 <br /> Ethylbenzene 200 ND 205 65.0-135 103 <br /> Xylenes(total) 600 ND 649 65.0-135 108 <br /> Surrogate: a,a,a-Trifluorotoluene 600 719 65.0-135 121 <br /> Matrix Spike 9100007-MS3 P909665-01 <br /> Gasoline 10/1/99 2000 ND 1470 ug.'kg 65.0-135 73.5 <br /> Surrogate: 4-Bromofluorobenzene 11600 438 65.0-135 73.0 <br /> Matrix Spike Dup 9100007-MSD1 P909665-01 <br /> Gasoline 10/1/99 2000 ND 1 170 ug kg 65.0-135 58.5 20.0 12.7 <br /> Surrogate: 4-Bromofluorobenzene if 600 385 65.0-135 64.1 <br /> Sequoia Analytical-Petaluma *Refer to end of report for text of notes and definitions. <br /> Page 6 of I I <br />