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1551 Indusinal Road <br /> Sequoia SanCarlos <br /> 650)23 9600 <br /> t65o}Jaz v�oo s <br /> r � Analytical FAX(650) 2 '0 <br /> www sequoialalabsbs cocorn <br /> Gettler-Ryan/Geostratep-ies(1) Project Unoca](4) <br /> 6747 Sierra Court Suite J Project Number Former Unocal SS#2859 Stockton,CA Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 09/06/01 12 14 <br /> V01atlle 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 1080082 -EPA 5030B IP/T1 <br /> Blank (1080082-BLK1) Prepared&Analyzed 08/19/01 <br /> Ethanol ND 1000 ugll <br /> 1,2-Dibromoethane ND 20 " <br /> 1,2-Dichloroethane ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> Methyl tert-butyl ether ND 20 " <br /> Tert-amyl methyl ether ND 20 <br /> Ten-butyl alcohol ND 100 " <br /> Surrogate 11-Dichloroethane-d4 476 500 952 76-114 - <br /> Surrogate Toluene-d8 491 500 984 88-110 <br /> Blank (1080082-BLK2) Prepared&Analyzed 08/23/01 <br /> Ethanol ND 1000 ug/I <br /> 1,2-Dibromoethane ND 20 <br /> 1,2-Dichloroethane ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> =Methvl tert-butyl ether ND— - 2 0 - - -- ---_ - <br /> Teri-amyl methyl ether ND 20 " <br /> --�Teit-butt'!alcohol— ------ND-------100--"- — --=-------- -- - ------ - - ----- <br /> ___ Surrogate 1 2-Dichloroethane-d4__ = _4_4_7 T -- -- 500 - - - 894 76-114 - - - — <br /> Surrogate Toluene-d8 478 500 956 88-110 <br /> LCS(1080082-BS1) Prepared&Analyzed 08/19/01 <br /> Methyl tert-butyl ether 549 20 ugli 500 110 70-130 <br /> Surrogate 1,1-Dichloroethane-d4 486 500 971 76-114 <br /> Surrogate Toluene-d8 481 500 964 88-110 <br /> Sequoia Analytical - San Carlos The results in this report apply to the soniples analyzed in accordance with the chain o <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 12 of 22 <br />