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ndu <br /> Road <br /> Sant tial Sequoia San Carlos AO70 <br /> (650)232-9600 <br /> FAX Analytical wwwsequoialabs.con <br /> er-Ryan/Geostrategies(]) <br /> Project: Tosco(1) <br /> 6?47 Sierra Court,Suite J Project Number: UNOCAL SS1l11195,LATHROP,CA Reported: <br /> Dublin CA-94568 Project Manager: Deanna Harding 08/28/01 07:22 <br /> Total Purgeable Hydrocarbon (C6-C12) by EPA 8015M and BTEX/MTBE by EPA 8021B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Balch Prepared Analyzed Method Notes <br /> NIW-10(L108074-10)Water Sampled: 08/10/01 11:07 Received:08/10/01 18:55 _ <br /> Purgeable Hydrocarbons as Gasoline ND 1200 ug/l 25 1080107 08/24/01 08124/01 DHS LUFT <br /> Benzene ND 12 <br /> Toluene ND 12 " <br /> Ethylbenzene ND 12 <br /> Xylenes(total) ND 12 " <br /> Methyl tert-butyl ether 21000 1000 200 M-04 <br /> Surrogate:a,o,a-Tris luororoluene 102% 70430 <br /> MW-11 (L]08074-11)Water Sampled: 08/10/01 13:35 Received:08/10/01 18:55 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ugll 1 1080107 08/24/01 08/24/01 DHS LUFT <br /> Benzene ND 0.50 " <br /> Toluene 0.76 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) 0.64 0.50 " <br /> Methyl ter(-butyl ether 590 50 10 M-04 <br /> t �-aie:a,a,a-Trifluoroioluene 129% 70-130 " <br /> MW-]2 (1.708074-12)Water Sampled: 08/10/01 13:05 Received:08/10/01 18:55 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ugll 1 1080107 08/24/01 08/24/01 DHS LUFT <br /> Benzene ND 0.50 " <br /> Toluene 0.76 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Methyl ter(-butyl ether ND 5.0 " <br /> Surrogate:a,a,a-Trifluorotoluene 113% 70-130 <br /> iia Analytical - San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 5 of 22 <br />