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885 Jams Dr <br /> Sequoia Mtrgsn HiV,CA 95037 <br /> (408)776-9600 <br /> Analytical FAX(409)792-6308 <br /> www s'quoralabs can <br /> URS Corporation[1] Project BP Heritage Site#11194,Tracy,CA MLK01I1 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number BP Hentage Site#11194,Tracy,CA Reported <br /> Sacramento CA,95833 Project Manager Vem Elarth 11/24/02 14 29 <br /> Total Purgeable Hydrocarbons (C6-C10) by EPA 8015B modiried, BTEXM by EPA 8021B <br /> Sequoia Analytical-Morgan Hill <br /> Reporting <br /> Analyte Result Linut Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-1 MLK0111-07 Water Sampled 10/3I/02 13 15 Received 11/01/02 12 50 <br /> Gasoline Range Organics(C6-C10) ND 50 ug/l 1 2KI4001 11/14/42 11/14/02 8015Bm/8021B <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tent-butyl ether ND 25 <br /> Surrogate a a a-Trtfluorotoluene 956% 55-142 " <br /> MW-2(MLK0111-08)Water Sampled 10/31/02 15 10 Received 11/01/02 12 50 _ <br /> Gasoline Range Organics(C6-C10) ND 50 ugll I 2K14001 11/14/02 11/14/02 801513m/8021B <br /> Benzene 2 7 050 " <br /> Toluene 13 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether 13 2 5 " <br /> Surrogate a,a,a-Trifluorotoluene 102% 55-142 " <br /> MW-3(MLKOIII-09)Water Sampled 10/31/02 13 50 Received 11/01/02 12 50 <br /> Gasoline Range Organics(C6-C10) ND 50 ug/1 1 2K14001 11/14/02 11/14/02 8015Bm18021B <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether 88 25 " <br /> Surrogate a,a,a-Tnfluorotoluene 826% 55-142 " <br /> 0 Sequoia Analytical-Morgan Hill The results in this report apply to the samples analysed 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 /> 5of10 <br />