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1455 McDowell Blvd.North,Ste,D <br /> Petaluma,CA 94954 <br /> Sequoia (707)792-1865 <br /> FAX(707)792-0342 <br /> Analyticalwww.sequoialabs.com <br /> Cambria Environmental- Emeryville Project: Equiva <br /> 6262 Hollis Street Project Number: 341 East Main Street,Ripon Reported: <br /> Emeryville CA,94608 Project Manager: Owen Rastchye 10/26/00 15:04 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 0100119-EPA 5030B [Prr[ <br /> LCS 010_0.119-BS1 Prepared&Analyzed 10/24/00 <br /> Benzene 49.6 2.00 ug/l 50.0 99.2 70.0-130 <br /> Toluene 45.0 2.00 50.0 90.0 70.0-130 <br /> Methyi tert-butyl ether 51.2 2.00 50.0 102 70.0-130 <br /> Surrogate:1,2-Dichloroethane-d4 -^ 56.1 �T 50.0 112 76.0-114 <br /> Surrogate: Toluene-d8 53.3 50.0 107 88.0-110 <br /> Surrogate;4-BFB 51.9 50.0 104 86.0-115 <br /> LCS 0100119-BS2 Prepared&Analyzed: 10/24/00 <br /> Benzene 55.4 2.00 ug/I 50.0 111 70.0-130 <br /> Toluene 50.8 2.00 50.0 102 70.0-130 <br /> Methyl tert-butyl ether 58.2 2.00 50.0 116 70.0-130 - <br /> Surrogate: 1,2-Dichloroe1hane-d4 55.1 50.0 110 76.0-114 <br /> Surrogate: Toluene-0 51.7 50.0 103 88.0-110 <br /> Surrogate:4-BFB 47.7 50.0 95.4 86.0-115 <br /> Matrix Spike(0100119_MS1) - _ _S_ou_rce: LO_1_0182-04 Prepared&Analyzed: 10/24/0_0___ -__ <br /> Benzene 53.4 2.00 ug/1 50.0 ND 107 60.0-140 <br /> Toluene 47.2 2.00 50.0 ND 94.4 60.0-140 <br /> Methyl tent-butyl ether 57.5 2.00 50.0 ND 115 60.0-140 - - <br /> Surrogate: 1,2-Dichloroethane-d4 - 56.8 - 50.0 114 76.0-114 <br /> Surrogate: Toluene-d8 51.3 50.0 103 88.0-110 <br /> Surrogate:4-BFB 49.4 50.0 98.8 86.0-115 <br /> Matrix Spike Dup(0100119-MSD1) Source: L010182-04 Prepared&Analyzed: 10/24/00 <br /> Benzene 53.1 2.00 ug/1 50.0 ND 106 60.0-140 0.939 25.0 <br /> Toluene 46.7 2.00 50.0 ND 93.4 60.0-140 1.06 25.0 <br /> Methyl tert-butyl ether 56.8 2.00 50.0 ND 114 60.0-140 0.873 25.0 <br /> Surrogate: 1,2-Dichloroethane-d4 f- 55.9 50.0 112 76.0-114 <br /> Surrogate: Toluene-d8 51.3 50.0 103 88.0-110 <br /> Surrogate:4-BFB 50.3 50.0 101 86.0-115 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain 0 <br /> 0 <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 7 of 10 <br />