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1455 McDowell Blvd. North,Ste. D <br /> Sequoia Petaluma,CA 94959 <br /> (707)792-1865 <br /> Analytical FAXquoi iabs.c 42 <br /> www.sequoialabs.com <br /> 40 <br /> Cambria Environmental-Emeryville Project: Equiva <br /> 6262 Hollis Street Project Number: 341 East Main St,Ripon Ca [reported: <br /> Emeryville CA,94608 Project Manager. Owen Ratchye 04/23/01 14:27 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical- Petaluma <br /> Reporting Spike Source %R$C RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1040335-EPA 5030 waters <br /> Blank(1040335-BLKI) Prepared&Analyzed: 04/14/01 <br /> Methy:tert-butyl ether ND 0.500 ug/l <br /> Surrogate:Dibromofluoromethane 4.89 5.00 97.8 88-118 <br /> LCS(1040335-BSI) Prepared&Analyzed: 04/14/01 <br /> Methyl tert-butyl ether 5.08 0.500 ugA 5.00 102 79-118 <br /> Surrogate:Dibromofluoromethane 4.99 5.00 99.8 88-118 <br /> Matrix Spike(1040335-MSI) Source:P104228-01 Prepared&Analyzed:04/14/01 <br /> Methyl tert-butyl ether 547 50.0 ug/1 500 ND 109 79-118 <br /> Surrogate.-Dibromofluoromethane 5.15 5.00 105 88-118 <br /> trix Spike Dup(1040335-MSD1) Source:P104228-01 Prepared&Analyzed:04/14/01 <br /> yl tent-butyl ether 527 50.0 ug/I 500 ND 105 79-118 3.72 20 <br /> Surrogate:Dibromofluoromethane 5.14 5.00 103 88-118 <br /> quoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. 77tis analytical report must be reproduced in its entirety. <br /> Page 5 of 6 <br />