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i 819 Striker Ave Ste 8 Sequoia Sacramento,CA 95630 (916)92 921-9600 FAX(916)921-0100 �► Analytical www sequaialabscom F) Gettler-Ryan-Dublin Project Former Unocal 2859,Stockton,CA 5308609 6747 Sierra Court,Ste J Project Number N/A Reported Dublin CA,94568 Project Manager Deanna L Harding 09/11/03 14 34 Gasoline(2-Methylpentane to 1,2,4-Trimethylbenzene) and BTEX by EPA 8015M and 8021B Sequoia Analytical - Sacramento Reporting Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes MW-6(5308609-07)Water Sampled-08/27/03 10 30 Received 08/28/03 14 30- - Purgeable Hydrocarbons ND 50 ug/l 1 3090002 09/02/03 09/02/03 EPA 8015/8021 Benzene ND 050 " Toluene ND 0 50 Ethylbenzene ND 050 " Xylenes(total) 095 050 " Methyl tert-butyl ether ND 20 " Surrogate a,a,a-Trifluorotoluene 95% 60-140 " MW-7(5308609-08)Water Sampled 08/26/03 13 50 Received 08/28/03 14 30 Purgeable Hydrocarbons ND 50 ug/l 1 3090002 09/02103 09/02/03 EPA 8015/8021 Benzene ND 0 50 Toluene ND 0 5Q " Ethylbenzene ND 0 50 " Xylenes(total) _ - ND 050 - Methyl tert-butyl ether ND 2 0 " Surrogate a aa-Trifluorotoluene 115% 60-140 " MW-8(5308609-09)Water Sampled 08/26/03 10 10 Received 08/28/03 14 30 Purgeable Hydrocarbons ND 50 ugA 1 3090002 09/02/03 09/02/03 EPA 80 1 51802 1 Benzene-- —ND --0 50- ___--- --- - - - — Toluene ND 050 " --Ethylbenzene-.� __ � 50__ Xylenes(total) 16 0 50 --Methyl tert-butyl ether—__ --__ __- TND r_ _ 20 - Surrogate a,a,a-Trifluorotoluene 108% 60-140 " F, " Sequoia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain of custody document Unless otherwise stated results are reported on a wet weight basis This analytical report must be reproduced in its entirety Page 5 of 20