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885 JarvisDrive <br /> Sequoia Morgan Hill CA 95037 <br /> M5037 <br /> a (408)776-9600 <br /> � Analytical FAX(408)782-6308 <br /> www sequ0lalahs con <br /> URS Corporation(]7 Project ARCO#2093,Tracy,CA <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number ARCO#2093,Tracy,CA Reported <br /> Sacramento CA,95833 Project Manager Vern Elarth 09/30/02 08 20 <br /> Total Purgeable Hydrocarbons (C6-C10) by EPA 8015B modified,BTEX by EPA 8021B <br /> Sequoia Analytical-Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> ATR-6 ML10355-05 Water Sampled 09/11/02 13 15 Received 09/13/02 16 20 <br /> Gasoline Range Organics(C6-Cid) ND 54 ug/1 1 2123003 09/23/02 09/23/02 8015Bm/8021 <br /> B <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate a a a-Trihuorotoluene 976% 70-130 " <br /> ATR-7 ML10355-06 Water Sampled 09/17/02 13 35 Received 09/13/02 16 20 <br /> Gasoline Range Organics(C6-C 10) ND 50 ug/I 1 2123002 09/23/02 09/23/02 8015Bm/8021 <br /> B <br /> Benzene ND 0 50 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Wri-m-ale a a a-Tralluorotoluene 111 % 70-136 <br /> ATR-8(ML10355-071 Water Sampled 09/11/02 14 00 Received 09/13/02 16 20 <br /> Gasoline Range Organics(C6-C10) 150 50 ug/1 1 2123002 09/23/02 09/23/02 8015Bm/8021 HC-12 <br /> B <br /> Benzene 30 050 " <br /> Toluene 070 050 " <br /> Ethylbenzene 42 050 " <br /> Xylenes(total) 14 0 50 " <br /> Surrozate a a a-TriJluorotoluene 110% 70-130 <br /> ATR-9(ML10355-081 Water Sampled 09/11/02 11 55 Received 09/13/02 16 20 <br /> Gasoline Range Organics(C6-C10) ND 50 ug/l 1 2I23002 09/23/02 09/23/02 8015Bm/8021 <br /> B <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate a a a-Tri luorotoluene 856% 70-130 " <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain <br /> . of custody document This analytical report must bi,reproduced in its entirety <br /> 3 of 13 <br />