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1551 Indusinal Road <br /> Sequoia San Carrloss)232-9600 <br /> a- ) <br /> - Analytical FAX(650)2329612 <br /> www sequoialabs com <br /> Gettier-Ryan/Geostrategi es(I) Project Tosco(1) <br /> 6747 Sierra Court, Suite J Project Number Tosco(Former BP)SS#11192, 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 Lunn Notes <br /> Batch 1110051 - EPA 5030B IP/T� <br /> Blank(1110051-BLKI) Prepared&Analyzed 11/12/01 <br /> Ethanol ND 500 ug/1 <br /> 1,2-Dibromoethane ND 10 " <br /> 1,2-Dichloroethane ND 10 " <br /> Di-isopropyi ether ND 1 0 " <br /> Ethyl tert-butyl ether ND 1 0 " <br /> Methyl ten-butyl ether ND 1 0 " <br /> Teri-amyl methyi ether ND 10 " <br /> 'Peri-butyl alcohol ND 20 " <br /> Surrogate 1 2-Dichloroethane-d4 569 500 114 70-130 <br /> Surrogate Toluene-d8 512 500 102 70-130 <br /> Blank(1110051-BLK2) Prepared&Analyzed 11/13/01 <br /> Ethanol ND 500 ug/1 <br /> 1,2-Dibromoethane ND 10 <br /> 1,2-Dichloroethane ND 10 " <br /> Di-isopropyl ether ND 10 " <br /> Ethyl Cert-butyl ether ND 10 " <br /> Methyl tert-butyl ether ND 1 0 " <br /> Tert-amyl methyl ether ND 1 0 <br /> 1 art-butyl alcohol ND 20 " <br /> uii i us�ate 1 2-Dichloroethane-d4 530 " 500 106 70-130 <br /> Surrogate Toluene-d8 498 Soo 996 70-130 <br /> LCS(1110451-BSI) Prepared&Analyzed 11/12/01 <br /> Methyl tert-butyl ether 587 10 ug/l 500 117 70-130 <br /> Surrogate 1,1-Drchlorcethane-d4 608 500 122 70-130 <br /> Surrogate Toluene-d8 511 500 102 70-130 <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples analyzed in accordance with the chain <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 14 of 19 <br />