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1 <br /> Zrquoia 1455 McDowell Blvd,North Ste D <br /> Petaluma,CA 94954 <br /> Analytical (70'''92-1842 <br /> FAX 07)792.0342 <br /> VVWW SeqWiskinhs coin <br /> URS Corp-Sacramento Project Arco Site 2130,Stockton,CA P306252 <br /> 2870 Gateway Oaks Dnve Suite 300 Project Number~ intron-50293 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elartli 06/27/03 17 13 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015B/8021B <br /> Sequoia Analytical -Petaluma <br /> Reporting <br /> Oyu Result lama Units Dilution Batch Prepared Analyzed Method Notes <br /> VW4(P306252-04)Water Sampled 06/11/03 06 15 Received 06/12/0311 45 <br /> Gasoline Range Organics ND 50 ug/] 1 3060544 06/23/03 06/23/03 EPA <br /> 8015BI8021B <br /> Benzene ND 050 <br /> Toluene ND 050 ^ TM ^ » <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 <br /> Surrogate a a,a-Tnfluorotoluene 101 % 65-135 p <br /> ,Surrogate 4-Bromofluorobenzene 100% 65-135 ^ <br /> VW-5(P306252-05)Water Sampled 06/11/03 04 25 Received.06/12/03 11 45 <br /> Gasoline Range Organics ND 50 ug/1 1 3060544 06/23/03 06/23/03 EPA <br /> solSB/8021B <br /> Benzene ND 050 <br /> Toluene ND 050 ^ „ <br /> Ethylbenzene ND 050Aft <br /> enes(total) ND 050'Wr » ^ » <br /> ogate a aa-Tnfluorotoluene 10.2% 65-135 � - <br /> Surrogate 4 Bromofluorobenzene 101 % 65-135 <br /> VW-7(P306252-06)Water Sampled 06/11/0310 10 Received-06/1210311.45 <br /> Gasoline Range Organics ND 50 ug/1 1 3060383 06/17/03 06/17/03 EPA <br /> 8015B/8021B <br /> Benzene ND 050 <br /> Toluene ND 050 » » ^ » <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 » ^ » <br /> Surrogate a,a,a-Tnfluorotoluene 101 % 65-135 ^ <br /> Surrogate 4-Bromofluorobenzene 98% 65-135 y » r <br /> ,Wla Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 4 of 27 <br />