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1455 McDowell Blvd, Ste D <br /> Sequoia Petaluma,lumuma,CA CA9495q <br /> 4Analytical (707)792-1365 <br /> FAX(707)792-0342 <br /> 4D <br /> w%vw sequoialabs com <br /> Gettler-Ryan/Geostrategies(1) Project Unocal(4) <br /> 6747 Sierra Court. Suite 3 Project Number Former Unocal 40187 Stockton Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 05/24/02 16 11 <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 Batch Prepared Analyzed Method Notes <br /> U-22 (L205039-22)Water Sampled 05/08/02 1005 Received 05/09/02 18 50 _ <br /> Purgeable Hydrocarbons as Gasoline ND 50 ugll 1 2050042 05/20/02 05/20/02 EPA 8021B <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-Trifluorotoluene 997% 70-130 " <br /> U-23(L205039-23)Water Sampled 05/08/02 10 50 Received 05/09/02 18 50 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l 1 2050042 05/20/02 05/20/02 EPA 80218 <br /> Benzene 1 5 050 <br /> Toluene 5 4 050 " <br /> Ethylbenzene 0 71 050 " <br /> Xylenes(total) 46 050 " <br /> Methyl teri-butyl ether ND 50 <br /> Surrogate a,a a-Trifluorololuene 102% 70-130 <br /> U-24(L205039-24)Water Sampled 05/08/02 11 40 Received 05/09/02 18 50 <br /> Purgeable Hydrocarbors as Gasoline ND 50 -'gA 1 2050042 05120/02 05/20/02 EPA 8021 B <br /> Benzene ND 050 " <br />_Toluene ND 050 <br /> Ethylbenzene NDβ€”0 50 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND-5 0-"β€” <br /> =--Surrogate <br /> "T=---,Surrogate a,a,a-Tri luorotoluene_ ---_---_ _β€”_ _..__102% _ -- 70-130- " <br /> Sequoia Analytical- San Carlos The results in this report apply to the samples analyed in accordance wail the char., <br /> custody document This analymcal report must be reproduced in its entirety <br /> Page 10 of 30 <br />