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1455 McDowell Blvd.North,Ste.D <br /> Sequoia Petaluma,CA79 94954 <br /> -1865 <br /> 4 41) <br /> (707)742-1865 <br /> FAX(707)792-0342 <br /> 111 ,1v 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 Ratchye 04/05/01 13:20 <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 1030699-EPA 5030 waters <br /> Blank(1030699-BLK1) Prepared&Analyzed:03/30/01 <br /> Methyl tert-butyl ether ND 0.500 ug/1 <br /> Surrogate:Dibromofluoromethane 4.96 5.00 99.2 88-118 <br /> Blank(1030699-BLK2) Prepared&Analyzed:04/02/01 <br /> Methyl tert-butyl ether ND 0.500 ug/3 <br /> Surrogate:Dibromofluoromethane 5.03 5.00 101 88-118 <br /> LCS(1030699-BSI) Prepared&Analyzed:03/30/01 <br /> Methyl tert-butyl ether 5.71 0.500 ug!] 5.00 114 79-118 <br /> Surrogate:Dibromofluoromeihane 5.32 5.00 106 88-118 <br /> LCS(1030699-BS2) Prepared&Analyzed:04/02/01 <br /> Methyl tert-butyl ether 5.45 0.500 ug/l 5.00 109 79-118 <br /> Surrogate:Dibromofluoromethane 5.24 " 5.00 105 88-118 <br /> Matrix Spike(1030699-MS1) Source: P103620-01 Prepared&Analyzed:03/30/01 <br /> Methyl tert-butyl ether 174 12.5 ug/1 125 29.7 115 79-118 <br /> Surrogate:Dibromofluoromethane 5.50 115.00 110 88-118 <br /> Matrix Spike Dup(1030699-MSD1) Source: P103620-01 Prepared&Analyzed:03/30/01 <br /> Methyl tert-butyl ether 180 12.5 ug/1 125 29.7 120 79-118 3.39 20 QM-07 <br /> Surrogate:Dibromofluoromethane 5.55 5.00 111 88-118 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain ole <br /> custody document. This analytical report must be reproduced in its entirety. <br /> pn Page 7 of 8 <br />