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1455 McDowell Blvd.North,Ste.D <br /> ma,CA• 4954 <br /> equola Petak(707)79291865 <br /> FAX(707)792-0342 <br /> Analytical www•sequoialabs.cotn <br /> Cambria Environmental-Oakland Project: Equiva <br /> 1144 65th St.,Suite C Project Number: 341 E. Main St.,Ripon Reported: <br /> Oakland CA,94608 Project Manager: Owen Ratchye 10/06/00 17:59 <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 0100064-EPA 5030 waters <br /> Matrix Spike(0100064-MSI) Source: P010019-01----Prepared&Analyzed: 10/03/00 <br /> Methyl tent-butyl ether 725 10.0 ugli 100 612 113 72.7-119 _ <br /> Surrogate:Dibromofluoromethane 5.62 v 5.00 112 88-118 <br /> Surrogate:l,2-Dichloroethane-d4 5.75 5.00 115 81-130 <br /> Surrogate:Toluene-d8 5.04 5.00 101 84-115 <br /> Matrix Spike Dup(0100064-MSDI) Source: P010019-01 Prepared&Analyzed: 10/04/00 <br /> Methyl tert-butyl ether 693 10.0 ugll 100 612 81.0 72.7-119 4.51 20 <br /> Surrogate:Dibromofluoromethane 5.47 5.00 109 88-118 <br /> Surrogate:l•2-Dichloroethane-d4 5.45 5.00 109 81-130 <br /> Surrogate:Toluene-d8 4.94 5.00 98.8 84-115 <br /> quoia 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 8 of 9 <br />