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1551 1ndusinal Road <br /> Sequoia San Carlos 23 -9600 <br /> {654)232-9600 <br /> . <br /> a- ) <br /> Analytical FAX equoi labsc 12 <br /> a wwwsequoialabs cpm <br /> ler-Ryan/Geostrategtes(1) Project Tosco(1) <br /> 47 Sierra Court,Suite J Project Number Tosco(Former BP)SS411192,Stockton Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 11/21/01 13 29 <br /> Volatile Organic 8 Oxygenated 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 1110051 -EPA 5030B IP/Tl - <br /> LCS(1]10051-BS2) Prepared&Analyzed 11/13/01 <br /> Methyl tert-butyl ether 57 8 1 0 ugll 500 116 70-130 <br /> Surrogate 1,2-Dichloroelhane-d4 581 500 116 70-130 <br /> Surrogate Toluene-d8 509 500 102 70-130 <br /> Matrix Spike(1110051-MS1) Source Ll J 1060-04 Prepared&Analyzed 11/13/01 <br /> Methyl tert-butyl ether 565 10 ug/1 500 ND 113 60-140 <br /> Surrogate 12-Dichloroelhone-d4 557 500 111 70-130 <br /> -„ ogate Toluene-d8 509 500 102 70-130 <br /> Matrix Spike Du (1110051-MSDI) Source L111060-04 Prepared&Analyzed 11/13/01 <br /> Methyl teri-butyl ether 65 5 10 ug/l 500 ND 131 60-140 148 25 <br /> Surrogate 1 2-Dichloroelhane-d4 612 500 122 70-130 <br /> Surrogate Toluened8 504 500 101 70-130 <br /> ih 1110068-EPA 5030B JP/TJ <br /> Blank(1110068-BLKI) Prepared&Analyzed 11/16/01 <br /> Ethanol ND 500 ug/I <br /> 1,2-Dibromoethane ND 10 " <br /> 1,2-Dichloroethane ND 10 " <br /> Di-isopropyl ether ND 1 0 " <br /> Ethyl tert-butyl ether ND 10 " <br /> Methyl tert-butyl ether ND 10 " <br /> Tert-amyl methyl ether ND 10 " <br /> T(,ri-butyl alcohol ND 20 " <br /> Lm i agate 1 2-Dichloroethane-d4 442 " 500 884 70-130 <br /> Surrogate Toluene-d8 509 Soo 102 70-130 <br /> to Analytical -San Carlos 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 15 of 19 <br />