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�b <br /> ;r <br /> 1455 McDowell Blvd.North,Ste.D <br /> Sequoia Petaluma, -1865 <br /> 94954 <br /> 4D (707)79 2-1865 <br /> FAX(707)792-0342 <br /> Analytical www.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.0.100129-7 EPA,5030B (VITI..__ _ <br /> LCS(0100129-BS1) _ Prepared&Analyzed: 10/25/00 - <br /> Benzene f- 54.2 2.00 ug/1 50.0 108 70.0-130 <br /> Toluene 49.6 2.00 50.0 99.2 70.0-130 <br /> Methyl tert-butyl ether 57.6 2.00 50.0 115 70.0-130 <br /> Surrogate: 1.2-Dichloroethane-d4 55.5 50.0 111 76.0-114 <br /> Surrogate: Toluene-d8 50.8 50.0 102 88.0-110 <br /> Surrogate.-4-BF8 48.7 50.0 97,4 86.0-115 <br /> LCS 0100129-BS2 T-_ Prepared&Analyzed: 10/25/00 <br /> Benzene 53.2 2.00 ugll 50.0 106 70.0-130 <br /> Toluene 46.2 2.00 50.0 92.4 70.0-130 <br /> Methyl tert-butyl ether 51.3 2.00 50.0 103 70.0-130 <br /> Surrogate: 1,2-Dichloroethane-d4 55.1 �'� 50.0 110 76.0-114 <br /> Surrogate: Toluene-0 50.6 50.0 101 88.0-110 <br /> Surrogate:4-BFB 49.0 50.0 98.0 86.0-115 <br /> Matrix Spike(0100129_MS1) - _ _ Source: L010162-02 Prepared&Analyzed: 10125100 -- _ <br /> Benzene 47.0 2.00 ug/I 50.0 ND 94.0 60.0-140 <br /> Toluene 42.9 2.00 50.0 ND 85.8 60.0-140 <br /> Methyl tert-butyl ether 58.5 2.00 50.0 ND 117 60.0-140 <br /> Surrogate: 1,2-Dichloroethane-d4 56.1 50.0 112 76.0-114 <br /> Surrogate: Toluene-d8 50.6 50.0 101 88.0-110 <br /> Surrogate:4-BFB 50.4 50.0 101 86.0-115 <br /> Matrix Spike Dup(0100129-MSD1) Source: L010162-02 Prepared&Anaiyzed: 10/25/00 <br /> Benzene --�� 44.6 2.00 ug/1 50.0 ND 89.2 60.0-140 5.24 25.0 <br /> Toluene 42.5 2.00 50.0 ND 85.0 60.0-140 0.937 25.0 <br /> Methyl tert-butyl ether 55.7 2.00 50.0 ND 111 60.0-140 5.26 25.0 <br /> Surrogate: l,2-Dichloroethane-d4 54.1 -� 50.0 108 76.0.114 <br /> Surrogate: Toluene-d8 50.6 50.0 101 88.0-110 <br /> Surrogate:4-BFB 50.6 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 o <br /> custody document. This analytical report must be reproduced in its entirety. IV <br /> Page 9 of 10 <br />