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a- ) (6Sequoia San an C teal Road <br /> Carlos <br /> CA 94070 <br /> Analytical FAX <br /> 50)232-9600 <br /> (650)232-9612 <br /> www sequoialabs Com <br /> Gettler-Ryan/Geostrategies(1) Project Unocal(4)s L208029 <br /> 6747 Sierra Cour(. Suite J - Project Number Former Unocal#2859 Stockton Reported <br /> Dublin CA 94568 Project Manager Deanna Harding _ 08/28/02 11 23 <br /> Total Purgeable Hydrocarbons (C6-00) by EPA 8015B modified, BTEXM by EPA 8021B - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lunn Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2H22001 -EPA 5030B (P/TJ <br /> 11i4atrix Spike Dup(2)-]22001-114SDl) Source MLH0353-12 Prepared&Analyzed 08/22/02 <br /> Toluene 395 050 ug/l 397 ND 995 60-140 282 25 <br /> Ethylbenzene 871 050 920 ND 91 5 60-140 0 458 25 <br /> Xylenes(total) 44 8 050 461 ND 972 60-140 437 25 <br /> Surrogate a a a-Trifluoratoluene 103 100 105 70-130 <br /> Batch 21H22002 -EPA 5030B JP/TJ . <br /> 131ank(2H22002-BLKI) Prepared&Analyzed 08/22/02 <br /> Gasoline Range Organics(C6-C10) ND 50 ug/l w <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Methyl ten-butyl ether ND 25 " <br /> Surrogate a a a-Trtuorotoluene 923 J00 --92 3 - 70-130 <br /> Laboratory Control Sample(2H22002-BSI) Prepared&Analyzed 08/22102, <br /> Benzene - - T --103 __ O 50�ug/i--_ _.100 - - -- 10370-130 - <br />_Toluene )0 3 050 100 103 70-130 <br /> Ethylbenzene - T - -- - <br /> -9-92 - 0 50 =- " -T- 10 0 -- -r —99 2 70430 <br /> Xylenes(total) 306 0 50 300 102 70-130 <br /> Surrogate a a a-Triuorotoluene 10 7 100 107 70-130 <br /> Laboratory Control Sample(2H22002-BS2) Prepared&Analyzed 08/22/02 <br /> Gasoline Range Organics(C6-C10) 266 50 ug/1 250 106 70-130 <br /> Surrogate a a a-Trifluorotoluene 123 100 123 70-130 <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples analyzed in accordance with the chain o <br /> custody document Unless otheneise stated,results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 19 of 25 <br />