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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> (707)792-1865 <br /> FAX <br /> Analytical www (707)labsc 42 <br /> sequoiaabs cont <br /> Gettler-Ryan/Geostrategtes(I) Project Unocal(4) <br /> 6747 Sierra Court Suite J Project Number Former Unocal 40187, 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 BTEX/MTBE by EPA 8021B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> NP-1-65_( 205039-28)Water Sampled 05/09/02 14 25 Received 05/09/02 1S 50 <br /> I <br /> Purgeable Hydrocarbons as Gasoline 10000 2500 ug/l 50 2050047 05/21/02 05/21/02 EPA 8021B P-01 <br /> Benzene 82 25 <br /> Toluene 700 25 " <br /> Ethylbenzene 230 25 <br /> Xylenes(total) 940 25 " <br /> Methyl tert-butyl ether ND 250 <br /> Surrogate a,a,a-Trifluorotoluene 101% 70-130 " <br /> NP-1-111 (L205039-29)Water Sampled 05/09/02 13 20 Received 05/09/02 l8 50 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ugn 1 2050042 05/20102 05/21/02 EPA 80218 <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-Trifluorotoluene 989% 70-130 <br /> NP-2-22 (L205039-30)Water Sampled 05109/0211 05 Received 05/09/02 1S 50 <br /> Purgeable Hydroca-bons as Gasoline 340 50 ug/l I 205n042 05/20/02 05/21/02 EPA 8021B P-02 <br /> Benzene 68 050 " <br />_ Toluene 26 050 " <br /> TEthylbenzene 1-4-050-1, <br /> Xylenes(total) 1 8 050 " <br />�Methyi tert-butyl ether �5 8-----5 0-- <br />—__Surrogate a a a-Triuorotoluene_._w r_ _ T _ 125% _ _70-130___ <br /> Sequoia Analytical - San Carlos The results in this report appb,to the samples analyzed in accordance with the charmo <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 12 of 30 <br />