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1455 McDowell Blvd, <br /> Sequoia Petaum North Ste <br /> a aluma CA 949544 <br /> �� Analytical FAX(707)792-1865 <br /> (707)792-0342 <br /> www sequoialabs com <br /> Gettler-Ryan/Geostrategies(1) Project Unoca](4) <br /> 6747 Sierra Court, Suite 1 Project Number Former Unocal#0187,Stockton Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 05/24/02 16,:38:: <br /> Total Purgeable Hydrocarbon (C6-C12) 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 /> U-4(L205039-04)Water Sampled 05/07/021240 Received 05/09/02 18 50 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l 1 2050040 05/18/02 05/18/02 EPA 8021B <br /> " <br /> Benzene ND 050 " <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 <br /> Methyl tert-butyl ether ND 50 <br /> Surrogate a a,a-Trililuorotoluene 951% 70-130 " <br /> U-5(L205039-05)Water Sampled 05/07/02 12 05 Received 05/09/02 18 50 _ <br /> Purgeable Hydrocarbons as Gasoline ND 50 ugA 1 2050040 05/18/02 05/18/02 CEPA 8021E <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 934% 70-130 <br /> U-6(L205039-06)Water Sampled 05/07/02 11 30 _Received 05/09/02 18 50 <br /> Purgeable yydrocarbens as Gasoline ND -50 uat! ^� t 2050040 05/18/02 05/18/02 EPA 8021E <br /> Benzene ND 050 " <br /> Toluene ND 050 " ^ <br />—Etllylbenzene ND 0 --- <br /> Xylenes(total) ND 050 <br />�Methy]feet-butyl ether-�� ND____5 O"_`_ <br /> " �_ - <br /> Surrogate a,a,a-Trifluorotoluene_ _ 841_/ �_70-130__ T_ ,,"T_ -_�" - T T"-- _� 11 _ <br /> Sequoia Analytical - San Carlos The results m this report apply to the samples analyzed in accordance with the char;o <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 4 of 30 <br />