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Sequoia �CM� Industrial 111 <br /> (650)232-9600 <br /> FAX(650)Z32-9612 <br /> Analytical wwwsequolalabs corn �J <br /> GettlerRyan/GeosWtegtes(I) Projecr Tosco(5)-ZZ <br /> 6747 Sierra Court,Suite] Project Number Tosca(Unocal)SS#6981 Reported- <br /> Project CA,94568- - - - - -- - - --Project Manager Deanna Harding - - — — 01/11/01 13 54 - <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical- San Carlos <br /> Rcpomng splice solucc °/.REC RPD <br /> IA.WYLI Result Linnt Units Leve] Result %REC Lmuts RPD 13mit Notes <br /> Batch 1010020-EPA 5030B PIT <br /> Blank(1010020-BLK2) Prepared&Analyzed 01/09/01 <br /> Ethanol ND 1000 ug/l <br /> Tert-butyl alcohol ND 100 " <br /> Methyl tat-butyl ether ND 200 " <br /> Di-isopropyl ether ND 200 " <br /> Ethyl tent-butyl ether ND 200 " <br /> Tert-amyl methyl ether ND 200 " <br /> Surrogate I 1-Dichloroethane-& 509 Soo 102 76-114 <br /> LCS(1010020-BSI) Prepared&Analyzed 01105101 <br /> Methyl tert-butyl ether 451 200 ug/l 500 902 70-130 <br /> Surrogate 12-Dlchloroethane-d4 451 500 904 76-114 <br /> LCS(1010020-BS2)___...._- Prepared&Analyzed 01/09/01 • <br /> Methyl tett-butyl ether 534 200 ugll 500 107 70-130 <br /> Surrogate 1,2-Dichloroethane-& 514 500 105 76-114 <br /> Matrix Spike(1010020-MSI) Source L012210-I4 Prepared&Analyzed 01/05/01 <br /> Methyl tert-butyl ether 456 200 ug/1 500 ND 912 60-140 <br /> Surrogate 1,1-Dichloroethane-d4 453 500 906 76-114 <br /> Matrix Spike Du (1010020-MSDI) Source L012210-14 Prepared&Analyzed 01/05/01 <br /> Methyl test-b»tyl ether 466 200 ug/l 500 ND 932 60-140 2 17 25 <br /> Surrogate 42 Dichloroedme-d4 462 500 924 76-114 <br /> Sequoia Analytical-San Carlos the results in this report apply to the samples analysed in accordance with the char <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 21 of 27 <br /> t� <br />