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1551 Industrial Road <br /> San cads,GA 94070-4111 <br /> Sequoia (650)232-9600 <br /> FAX(650)232-9612 <br /> www secluolalabs com <br /> Analytical <br /> r u <br /> G;tlex-11yan/Geostrategtcs(l) project. Tosco(5)-ZZ <br /> Reported <br /> 6747 Sierra Court,Suite J Project Number Tosco(Unocal) SS#6981 01111101 13 54 <br /> Dublin CA,94568 project Manager Deanna Harding <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical-San Carlos <br /> Spike s� %REC Rim <br /> �°�1II8I�mits RPD Laetut Nous <br /> lArWyte Result !amu Units Level Result %REC <br /> Batch 1010019-EPA 5030B PIT <br /> Blank(1014019-BLK2) Prepared&Analyzed 01/08/01 <br /> Ethanal ND 1000 ug/l <br /> ND 200 <br /> Teat-butyl alcohol " <br /> ND 200 " <br /> Methyl tettbutyl ether ND 200 " <br /> Di-tsopi o rA ether 200 " <br /> Ethyl tett-butyl ether ND <br /> TeR-amyl methyl ether ND zoo " <br /> Surrogate 1,1-Dichloroethane{14 <br /> 492 SO 0 98 4 ?6-114 <br /> prepared&Analyzed 01/05/01 <br /> LCS(1010019-B51) 200 U911 50 0 836 70-130 <br /> Metbyl teti-ltutyl ether 41 8 <br /> Sete 1,2-Dichloroethane�4 <br /> 499 Soo 99 8 76-114 <br /> LCS(1010019-BS2) Prepared 86 Analyzed 01/08/01 <br /> 41 4 200 ug/l 500 828 70-130 <br /> Methyl teatbutyl ether 982 76-114 <br /> Surrogate 1,2-Dtchloroethane{(4 <br /> 491 50 0 <br /> Source L012210-18 Prepared&Analyzed 01105101 <br /> Matrix S Ike(1010019-M51) 2 00 u.q 500 ND 914 60-140 <br /> thyl <br /> Metsatbiityl ether 407 <br /> Surrogate 1,2Dichloroethane-d4 <br /> 506 <br /> SO 0 101 76-114 <br /> Source L012210-18 Prepared&Analyzed 01/05/01 <br /> Matrix S ike Du (1010019-MSD!) 41 1 200 ugll 54 0 ND 822 60-140 0 978 25 <br /> Methyl tem-lnityl ether 101 76 114 <br /> Surrogate 1.1 Dichloroethane-d4 <br /> 50 5 50 0 <br /> Batch 1010020-EPA 5030B prepared&Analyzed 01/05/01 <br /> Blank 1.010020-BLKI 1000 U94 <br /> Ethanol ND <br /> Teat butyl alcohol ND 100 <br /> Methyl teat4wyl ether ND 200 " <br /> ND 200 " <br /> Di-isopcopYl ether ND 200 " <br /> Ethyl tert-butyl ether <br /> Tert-amyl methyl ether ND 200 " <br /> 453 500 906 76-114 <br /> Surrogate 1,1 Dechloroethane-d4 <br /> The results in this report aPPly to the samples analyzed in accordance with the chain of <br /> is A lytical-San Carlos custody document Thu analytical report must be reproduced in its entirety <br /> Page 20 of 27 <br />