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fy <br /> y. 1455 McDowell Blvd.North,Ste.D <br /> Sequoia Petaluma,CA 94954 <br /> (707)792-1865 <br /> FAX(707)792-0342 <br /> Analytical www.sequoialabs.corn <br /> Cambria Environmental- Emeryville Project: Equiva <br /> 6262 Hollis Street Project Number: 341 East Main St,Ripon Reported: <br /> Emeryville CA,9.4608 Project Manager: Owen Ratchye 02/15/01 09:45 <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 1020334-EPA 5030,waters <br /> Matrix Spike(1020334-MS1) Source: P102311-17 Prepared&Analyzed: 02/14/01 <br /> Gasoline 2680 50.0 ug/l 2750 62.7 95.2 65-135 <br /> Benzene 38.4 0.500 32.0 ND 120 65-135 <br /> Toluene 189 0.500 193 ND 97.9 65-135 <br /> Ethylbenzene 49.0 0.500 46.0 ND 107 65-135 <br /> Xylenes(total) 233 0.500 231 ND 101 65-135 <br /> Methyl tert-butyl ether 116 2.50 52.0 47.4 132 65-135 <br /> Surrogate:a,a,a-TriJluorotoluene 349 300 116 65-135 <br /> Surrogate:4-Bromofluorobenzene 315 300 105 65-135 <br /> Matrix Spike Dup(1020334-MSDI) Source: P102311-17 Prepared&Analyzed:02/14/01 <br /> Gasoline 2680 50.0 ug/l 2750 62.7 95.2 65-135 0 20 <br /> Benzene 37.9 0.500 32.0 ND 118 65-135 1.31 20 <br /> Toluene 184 0.500 193 ND 95.3 65-135 2.68 20 <br /> Ethylbenzene 48.3 0.500 46.0 ND 105 65-135 1.44 20 <br /> Xylenes(total) 226 0.500 231 ND 97.8 65-135 3.05 20 <br /> Methyl tent-butyl ether 112 2.50 52.0 47.4 124 65-135 3.51 20 <br /> Surrogate:a,a,a-Trifluorotoluene 345 .300 115 65-135 <br /> Surrogate:4-Bromofluorobenzene 316 300 los 65-1.35 <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 7 <br />