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Sequoia I$$ Industrial Road <br /> San <br /> Carlos CA94070 <br /> (650)23 2--9600 I <br /> All ]cal <br /> FAX(650)232-9612 <br /> A .aytwww.sequoialabs.com <br /> i <br /> r-Ryan/Geostrateg.ies(l) Project: Tosco(l) <br /> 6'/�7,Sierra Court.Suite J Project Number: Unocal SS#08671.Stockton.CA Reported: <br /> Dublin CA,94568 Project Manager: Deanna Harding 09/05/01 07:36 <br /> Total Purgeable Hydrocarbon (C6-Cl2) by EPA 8015M and BTEXIMTBE by EPA 8021B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> A4W-3(L108144-04)Water Sampled: 08/22/01 10:05 Received: 08/22/01 19:40 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/1 1 1090001 09/01/01 09/01/01 DHS LUFT <br /> Benzene ND 0.50 <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 <br /> Xylenes(total) ND 0.50 <br /> Methyl ten-butyl ether ND 5.0 ` <br />+ Surrogate:a,a.a-Trifluoroioluene 92.8% 70-130 <br /> MVV-4 (L108144-05)Vlrater Sam led:08/22/01 11:20 Received: 08/22/01 19:40 1 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ugll 1 1090001 09/01/01 09/01/01 DHS LUFT f <br /> Benzene ND 0.50 <br /> Toluene ND 0.50 <br /> Ethylbenzene ND 0.50 " # <br /> Xylenes(total) ND 0.50 " <br />#_ Methyl tert-butyl ether 200 5.0 " <br /> S% ate:a,o,a-Tris luorotoluene 93.0% 70-130 <br /> 1 <br /> i <br /> Sia 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 3 of 10 <br /> i <br />