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1455 McDowell Blvd.North,Ste.D <br /> Sequoia Petaluma, 79 94954 <br /> -1865 <br /> • (707)792-1865 <br /> FAX(707)792-0342 <br /> Analyticalwww.sequoialabs-com <br /> Cambria Environmental-Emeryville Project: Equiva <br /> 6262 Hollis Street Project Number: 341 East Main St,Ripon Reported: <br /> Emeryville CA,94608 Project Manager: Owen Ratchye 02/15/01 09:45 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015MI8020M - 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.1020153__EP-"A.5030,_wa ters <br /> Blank(1020153-BLK2) Prepared&Analyzed:02/14/01 <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 /> Methyl tert-butyl ether ND 2.50 " <br /> Surrogate:a,a,a-Trifluorotoluene 301 300 100 65-135 <br /> Surrogate. 4-Bromofluorobenzene 296 300 98.7 65-135 <br /> LCS(1020153-BS2) Prepared&Analyzed:02/14/01 <br /> Gasoline 2500 50.0 ugll 2750 90.9 65-135 <br /> Benzene 37.8 0.500 32.0 118 65-135 <br /> Toluene 194 0.500 193 101 65-135 <br /> Ethylbenzene 42.8 0.500 46.0 93.0 65-135 <br /> Xylenes(total) 211 0.500 231 91.3 65-135 <br /> Methyl Cert-butyl ether 64.1 2.50 52.0 123 . 65-135 <br /> Surrogate:a,a,a-Tri luorotoluene 328 300 109 65-135 <br /> Surrogate:4-Bromofluorobenzene 314 300 105 65-135 <br /> Matrix Spike(1020153-MS1) Source: P102076-01 Prepared&Analyzed:02/07/01 <br /> Gasoline 3030 50.0 ug/1 2750 ND 109 65-135 <br /> Benzene 40.8 0.500 32.0 ND 127 65-135 <br /> Toluene 210 0.500 193 ND 109 65-135 <br /> Ethylbenzene 45.2 0.500 46.0 ND 98.3 65-135 <br /> Xylenes(total) 227 0.500 231 ND 98.3 65-135 <br /> Methyl tent-butyl ether 70.8 2.50 52.0 ND 136 65-135 QM-07 <br /> Surrogate:a,a,a-Trifluorotoluene 325 300 108 65-135 <br /> Surrogate:4-Bromofluorobenzene 335 300 111 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 4 of 7 <br />