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1551 lndusinal Road <br /> Sequoia Caries9600 <br /> 0 <br /> Sen CA 07 <br /> ID (650)232 9600 <br /> Analytical wwuqFAX(650)232-9612 <br /> om <br /> 1 www sequo�elabs cam <br /> Gen]er-Ryan/GeostrateRtes(1) Project Unocal(4) <br /> 6747 Sierra Court, Suite 1 Project Number Unocal SS#5098,Stockton CA Reported <br /> - Dublin CA 94568 Project Manager Deanna Harding _ 01/01/02 11 05 _ <br /> _ Volatile Organic Oxygenated Compounds by EPA Method 8260B - - <br /> __ Sequoia Analytical - San Carlos <br /> - Reponmg <br /> Anaivte Result Limn units Dilution Batch Prepared Analyzed Method Notes <br /> MW-2(L112030-03)Water Sampled 12/04/01 14 12 Received 12/04/01 17 50 <br />—I 2-Dibromoethane(EDB)-- ---_ — --ND- ----20---ug/l ----20 — 1120006---12/66/01---12/06/01— -EPA 826013- <br /> 1 2-Dichloroethane ND 20 11 " " <br /> Benzene 1500 20 <br /> Toluene 300 20 <br /> Ethvlbenzene 930 20 " " <br /> Xvlenes(total) 5600 20 <br /> Methvl tert-butyl ether ND 20 <br /> Di-isopropyl ether ND 20 " <br /> Teri-butyl alcohol ND 400 <br /> Ethvl tert-butyl ether ND 20 <br /> Ten-amyl methvl ether ND 20 " <br /> Surrogate 1,1-Dichloroethane-d4 112% 70-130 " <br /> Surrogate Toluene-d8 N 105% 70-130 <br /> Surrogate 4-BFB 104% 70-130 <br /> MW-3(L112030-04)Water Sampled 12/04/01 15 10 Received 12/04/01 17 50 i <br /> 1 2-Dibromoethane(EDB) ND 10 ug/I 1 1120006 12/06/01 12/06/01 EPA 8260B <br /> 1.2-Diehloroethane ND 10 <br /> Benzene 130 10 " <br /> Toluene 39 10 " <br /> -Ethylbenzene -==37----1 0- <br /> Xvlenes Itotal) 170 10 <br /> Methyl tert-butyl ether - - ND _ 1 0 ------ <br /> Di-isopropyl ether_ ND 10 " <br /> Tert-butyl alcohol ND 20 <br /> Ethyl Cert-butyl ether ND 10 <br /> Tert-amyl methyl ether ND 10 <br /> Surrogate 1,1-Dtehloroelhane-d4 106% 70-130 " <br /> Surrogate Toluene-d8 105% 70-130 " <br /> Surrogate 4-BFB 964% 70-130 <br /> Sequoia Analytical -San Carlos The results to this report apply to the samples analjned to accordance with the chain o <br /> cusiody document This analyncol report must be reproduced in its entirety <br /> Page 10 of 34 <br />