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. 1551 1ndustnal Road <br /> Sequoia San Carlos CA94070 <br /> 23 <br /> (650)232-960-9600 <br /> Analytical FAX(650)232-9612 <br /> www sequoialabs abs co com <br /> Gettler-Ryan/Geostrategies(I) Project Tosco(1) <br /> 6747 Sierra Court Suite 1 Project Number Tosco(Unocal)SS#6981 Stockton CA Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 09/21/01 10 19 <br /> _-- Total Purgeable Hydrocarbon (C6-C12) by EPA-8015M and BTEX/MTBE by EPA 8021.E <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> )\�1W-16 L109080-13)Water Sampled 09/12/0113 40 Received 09/13/01 19 30 <br /> Purgeable Hydrocarbons as Gasoline 1400 500 ugll 10 1090096 09/24/01 09/24/01 DHS LUFT P-02 <br /> Benzene <br /> 47 5 0 " <br /> Toluene ND 5 0 " <br /> Ethylbenzene 22 5 0 <br /> Xylenes(total) 85 5 0 <br /> Methyl tert-butV1 ether 110 50 " <br /> Surrogate a,a a-Trti luorololuene )07% 70-130 " <br /> VW-1 (1-109080-14)Water Sampled 09/12/01 15 50 Received 09/13/01 19 30 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ugA 1 1090095 09/24/01 09/25/01 DHS LUFT <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tent-butyl ether ND 5 0 <br /> Surrogate a a a-Trifluorotoluene 115% 70-130 <br /> VW-3(1.109080-15)Water Sampled 09/13/01 13 10 Received 09/13/01 1930 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ugll 1 1090095 09/24/01 09/25/01 DHS LUFT <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 5 0 " <br /> Surrogate a,a a-Triuorotoluene 116% 70-130 " <br /> Sequoia Analytical- San Carlos The results in this report apply to the samples analyzed to accordance ivith the chain <br /> custody document This analytical report niust be reproduced in its entire[), <br /> Page 6 of 21 <br />