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1455 McDowell Blvd.North,Ste.D <br /> Sequoia Petaluma,CA 94954 <br /> (707)792-1865 <br /> FAX(707)792-0342 <br /> Analytical www,sequoialabs.cotn <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 Rastchye 11/15/00 07:33 <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 0110308-EPA 5030 waters <br /> Matrix-Spike:Dup:(01-10308-MSD1) -Source:-PO111,255-02 Prepared.&-Analyzed:-hl'/-i°i'!00 <br /> Benzene 5.18 0.500 ug/l 5.00 ND 104 80-119 5.76 20 <br /> Methyl Wt-butyl ether 4.89 0.500 5.00 ND 97.8 79-118 5.03 20 <br /> Toluene 5.05 0.500 5.00 ND 101 86-115 5.49 20 <br /> Surrogate:DihromofluoromethaneW 4.76 5.00 95.2 88-118 <br /> Surrogate:1,2-Dichloroelhane-d4 4.73 5.00 94.6 81-130 <br /> Surrogate: Toluene-d8 4.67 5.00 93.4 84-115 <br /> Surrogate:4-Bromofluorohenzene 4.47 5.00 89.4 78-114 <br /> • <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 7 of 8 <br />