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Sequoia 1551 lndustnal Road San Carlos CA 94070, Analytical (650)232 9600 FAX(650)232 9612 www sequoialabs com ' Gettler-Ryan/Geostrategies(1) Project Unocal(4) 6747 Sierra Court, Suite J Project Number Former Unocal#5098&Montgmery Ward Rcported Dublin CA,94568 Project Manager Deanna Harding 03/26/02 12 44 ' Total Purgeable Hydrocarbons by DHS LUFT Sequoia Analytical - San Carlos Reporting Analyte Result - Limit Units Dilution Batch Prepared Analyzed Method Notes MW-13(L203015-15)Water Sampled 03/04/020941 Received 03/05/02 I8 25 Purgeable Hydrocarbons as Gasoline ND 50 ug/l 1 2030039 03/16/02 03/16/02 EPA 8015M Surrogate a,a,a-Trifluorotoluene _ 93 3% 60-140 " MW-14(L203015-16)Water Sampled 03/04/02 09 02 Received 03/05/02 IS 25 ' Purgeable Hydrocarbons as Gasoline ND 50 ug/l 1 2030039 03/16/02 03/16/02 EPA 8015M Surrogate a,a,a-Trifluorotoluene 83 6% 60-140 MW-14A (L203015-17)Water Sampler] 03/04/020910 Received 03/05_/02 18 25 Purgeable Hydrocarbons as Gasoline ND 50 ug/1. 1 2030039 03/16/02 03/16/02 EPA 8015M Surrogate a a,a-Trifluorotoluene 89 5% 60-140 " MW-15(L203015-18)Water Sampled 03/04/02 09 50 Received 03/05/02 I8 25 Purgeable Hydrocarbons as Gasoline ND 50 ug/l 1 2030039 03/16/02 03/16/02 EPA 8015M _ Surrogate a a,a-Trifluorotoluene 871 % 60-140 !0 ' MW-16(L203015-19)Water -Sampled 03/04/021530 Received 03/05/02 18 25 Purgeable Hydrocarbons as Gasoline - 490 50 ug/l 1 2030039 03/16/02 03/16/02 EPA 8015M P Surrogate a,a,a-Tnfluorotoluene 139% 60-140 " S- MW-l7 L203015-20 Water Sampled 03/03/02 12 10 Received 03/05/02 18 25 Purgeable Hydrocarbons as Gasoline ND 50 ug/l 1 2030037 03/15/02 03/16/02 EPA 8015M Surrogate a,a,a-Trifluorotoluene 80 3% 60--140 _MW-18(L203015-21)Water Sampled 03/04/02 10 15 Received 03/05/02 18 25 _ -=-Purgeable Hydrocarbons as Gasoline-------ND— -50—ug/1-- ---1 -2030039 03/16/02 03/16/02 EPA 8015M —, Surrogate a,a,a-Trifluorotoluene -_— _ y 910% _ 60-140 Sequoia Analytical - San Carlos The results in thrs report apply to the samples analyzed in accordance with the chain of custody document This analytical report must be reproduced in its entirety , Page 5 of 91 ,