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Sequoia 1551 Road <br /> San Carlosrlos A94070 <br /> + (650)13 23 2-9600 <br /> mqW Analytical FAX(650)232-9612 <br /> www scquoialabs corn <br /> Gettler-Ryan/Geostratepies(1) Project Unocal(4) <br /> 6747 Sierra CourL Suite J Project Number Unocal SS45098 Stockton CA Reported <br /> Dublin CA 94568 Prosect Manager Deanna Harding 01/01/02 11 05 <br /> Volatile_Organic Oxygenated Compounds by EPA Method 8260B <br /> y Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MWA 6(L]12030-19)Water Sampled 12/03/01 13 57 Received 12/04/0117.50 <br /> 1 2-Dibromoethane(EDB) ND 1 0 -ugA 1 1120027 12/07/01 12/07/01 EPA 8260B -' <br /> T - „-----„ --- - =„ -------- - - -- ---- - -- <br /> - -1-2=Dichioroi:thane- - --- --- -----ND`-� ----1 0 --"--- - ;, - - <br /> ^ <br /> Benzene ND 10 " n " <br /> Toluene ND 10 " ^ <br /> Ethylbenzene ND 10 " ^ <br /> Xylenes(total) ND 10 <br /> Methyl tett-butvl ether ND 10 <br /> Di-isopropyl ether ND 10 <br /> Teri-butyl alcohol ND 20 <br /> Ethyl tert-butyl ether ND 1 0 <br /> Teri-amyl methvl ether ND 1 0 <br /> Surrogate 1,2-Dichloroerhane-d4 113% 70-130 " <br /> Surrogate Toluene-d8 100% 70-130 " <br /> Surrogate 4-BFB 101% 70-130 " <br /> MW-17 L112030-20 Water Sampled 12/03/010835 Received 12/04/01 I7 50 <br /> 12-Dibromoethane(EDB) ND 10 ugA 1 1120027 12/07/01 12/07/01 EPA 8260B <br /> 1,2-Dichloroethane ND 10 <br /> Benzene ND 10 <br /> Toluene ND 10 <br /> Ethylbenzene ND,____ _l0 <br /> Xylenes(total) __-- _ - ND � ] 0 <br /> Methyl tart-butyl ether �__-_ND_ -10---"-_ <br /> Di-isopropyl ether _ -�- - -- - - ND� - 10 - <br /> Tert-butyl alcohol_— ND- - 20 - <br /> Ethyl tert-butyl ether ND 10 <br /> Tert-amyl methyl ether ND 1 0 <br /> Surrogate 1,1-Dichloroethane-d4 111 % 70-130 " <br /> Surrogate Toluene-d8 976% 70-130 <br /> Surrogate 4-BFB 100% 70-130 " <br /> Sequoia Analytical - San Carlos The results to this report apply to the samples anabzed in accordance with the chain a <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 18 of 34 <br />