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1455 McDowell Blvd.North,Ste.D <br /> Sequoia Petaluma,CA <br /> 94954 <br /> (707)742-1865-1865 <br /> 4 <br /> 15) <br /> WOAnalytical FAX(quos www.sequoialabs.com wwwsequoialabs.com <br /> Cambria Environmental-Oakland Project Equiva <br /> 1144 65th St.,Suite C Project Number: 341 E.Main St.,Ripon Reported: <br /> Oakland CA,94608 Project Manager: Owen Ratchye 10/46/00 17:59 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M/8020M <br /> Sequoia Analytical- Petaluma <br /> Reporting <br /> Anaiyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> 1-1 (P010019-01)Water Sampled: 09/29/0009:00 Received: 10/02/00 17:30 <br /> Gasoline ND 250 ug/1 5 0100053 10/03/00 10/03/00 EPA <br /> 8015M/8020M <br /> Benzene ND 2.50 " <br /> Toluene ND 2.50 " <br /> Ethylbenzene ND 2.50 " <br /> Xylenes(total) ND 2.50 " <br /> Methyl tert-butyl ether 516 12.5 <br /> Surrogate:a,a,a-Tris luorotoluene 112 % 65-135 " <br /> Surrogate:4-Bromofluorobenzene 92.7% 65-135 " <br /> A-1 (P010019-02)Water Sampled: 09/29/00 09:00 Received: 10/02/00 17:30 <br /> Gasoline ND 50.0 ug/l 1 0100053 10/03/00 10/03/00 EPA <br /> 8015M/8020M <br /> Benzene ND 0.500 " <br /> OV,eueneND 0.504 <br /> ,bnzene ND 0.500nes(total) ND 0.500 " <br /> Methyl tert-butyl ether ND 2.50 <br /> Surrogate:a,a,a-Trifl'uorotoluene 105% 65-135 " <br /> Surrogate:4-Bromofluorobenzene 92.7 % 65-153 " <br /> B-1 (P010019-03)Water Sampled: 09/29/00 09:00 Received: 10/0210017:30 <br /> Gasoline ND 50.0 ug/1 1 0100053 10/03/00 10/03/00 EPA <br /> 8015M/8020M <br /> Benzene ND 0.500 " <br /> Toluene ND 0.500 " <br /> Ethylbenzene ND 0.500 " <br /> Xylenes(total) ND 0.500 " <br /> Methyl tert-butyi ether ND 2.50 " <br /> Surrogate:a,a,a-Trifluorotoluene 113 % 65-135 " <br /> Surrogate:4-Bromofluorobenzene 92.7% 65-135 <br /> —Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 2 of 9 <br />