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iy <br /> 1455 McDowell Blvd.North,Ste.D <br /> Sequoia Petaluma, -1865 <br /> 94954 <br /> (707)79 2-1865 <br /> FAX(707)792-0342 <br /> Analytical www.sequoialabs.com <br /> Cambria Environmental-Oakland Project: Equiva <br /> 1144 65th St.,Suite C Project Number: 341 E.Main Street,Ripon Reportcd: <br /> Oakland CA,94608 Project Manager: Darryk Ataide 10/11/00 16:59 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M18020M- Quality Control <br /> Sequoia Analytical - Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch:01001-16 r-EPA,5030,watelts <br /> Blank(0100116-BLKI) Prepared&Analyzed: 10/05/00 <br /> Gasoline ND 50.0 ug/l <br /> Benzene ND 0.500 " <br /> Toluene ND 0.500 " <br /> Ethylbenzene ND 0.500 <br /> Xylenes(total) ND 0.500 <br /> Metbyl tert-butyl ether ND 2.50 " <br /> Surrogate:a,a,a-Trifluorotoluene 314 300 105 65-135 <br /> Surrogate:4-Bromofluorobenzene 271 300 90.3 65-135 <br /> LCS(0100116-BSI) Prepared&Analyzed: 10/05/00 <br /> Gasoline 877 50.0 ug/1 1000 87.7 65-135 <br /> Surrogate:4-Bromofluorobenzene 281 300 93.7 65-135 <br /> Matrix Spike(0100116-MS1) Source: P010072-02 Prepared&Analyzed: 10/05/00 _ <br /> Gasoline 873 50.0 ug/l 1000 ND 87.3 65-135 <br /> Surrogate:4-Bromofluorobenzene 272 " 300 90.7 65-135 <br /> Matrix Spike Dup(0100116-MSDI) Source: P010072-02 Prepared&Analyzed: 10/05/00 <br /> Gasoline . 880 50.0 ug/l 1000 ND 88.0 65-135 0.799 20 <br /> Surrogate:4-Bromafluorobenzene 281 300 93.7 65-135 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 6 of 9 <br />