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p 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.com <br /> Cambria Environmental-Emeryville Project: Equiva <br /> 6262 Hollis Street Project Number: 341 East Main St,Ripon Reported: <br /> Emeryville CA,94668 Project Manager: Owen Ratchye 01/22/01 16:28 <br /> Volatile Organic Compounds by EPA Method 8260B - 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 1010440-EPA 5030 waters <br /> Matrix Spike Dup(1010440-MSD1) Source: P101325-01 Prepared&Analyzed:01/19/01 <br /> Benzene 9.27 1.00 ug11 10.0 ND 92.7 80-119 1.96 20 <br /> Methyl tert-butyl ether 84.3 1.00 10.0 73.8 105 79-118 0.476 20 <br /> Toluene 9.67 1.00 10.0 ND 96.7 86-115 3.36 20 <br /> Surrogate:Dibromofluoromethane 4.63 5.00 92.6 88-118 <br /> Surrogate:1,2-Dichloroethane-d4 5.06 5.00 101 81-130 <br /> Surrogate:Toluene-0 5.14 5.00 103 84-115 <br /> Surrogate:4-Bromofluorobenzene 5.66 5.00 113 78-124 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain o <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 7 of 8 <br />