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S' 919 Striker Ave Ste 8 <br /> Sequoia " SacrariteCA 95834 <br /> 9196W <br /> 41) 1 FAX(916)921-0100 <br /> Analytical www sequoialabs com <br /> Gettler-Ryan-Dublin f , Project Former Unocal 2859,Stockton,CA i S303055 <br /> 6747 Sierra Court,Ste J _ 1 Project Number NIA Reported <br /> Dublin CA,94568 L Project Manager Deanna L Harding 03/19103'18 34 <br /> Gasoline (2-Methylpentane to 1,2,4-Trimethylbenzene) and BTEX by EPA 8015M and 8021B <br /> Sequoia Analytical - Sacramento <br /> Reporting s <br /> Anaiyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> (QA(5303055-01)Water Sampled 02/27/03 00 00 Received 03/03/0312 15 <br /> Purgeable Hydrocarbons ND „ 50 ' ug/l z 1 3030129 03/10/03 03110103- EPA 8015/8021 - <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tett-butyl ether ND 2 0 " <br /> Surrogate a,a,a-Trifluorotoluene 97% 60-140 " <br /> MW-1 (S303055-02)Water Sampled 02/27/03 11 20 Received 03/03/03 12 15 <br /> Purgeable Hydrocarbons ND 50 ugll 1 3030129 03/10/03 03/10/03 EPA 8015/8021 <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene m ND 05o <br /> Xylenes(total) ND 050 " <br /> Methyl tent-butyl ether ND 2 0 " <br /> Surrogate a a,a-Trifluorotoluene 91 % 60-140 <br /> MW-2 (5303055-03)Water Sampled 02/28/03 13 20 Received 03/03/03 12_15_ <br /> Purgeable Hydrocarbons 2600 500 ugll 10 3030129 03/10/03 03/10/03 EPA 8015/8021 <br /> Benzene 160 5 0 " <br />—Toluene ----140-5 <br /> Ethylbenzene 93 5 0 " <br />=–Xylenes_(total) _=�' - --- 570-50 — <br /> Methyl tert-butyl ether ND 20 " <br /> Surrogate a a a-Trifluoiotoluene`---- – ' "86 %-----60=140 --- <br /> Sequoia Analytical - Sacramento The results in this)eport apply to the samples analwed in accordance with the chain of <br /> custody document Unless otherK ise stated results ar e i eported on a wet weight basis <br /> This anahrocal report must be reproduced in its entiren, <br /> Page 3 of 24 <br />