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Sequoia 1551 industrial Road <br /> San Carlos,CA 94070 <br /> KD <br /> �w Analytical [650)232-9600 <br /> FAX(650)232-9612 <br /> www sequoialabs corn <br /> Gettler-Ryan/Geostrategtes(1) Protect Unocal(4) L208029 <br /> l <br /> 6747 Sierra Court Suite] Project Number Former Unocal 112859 Stockton Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 08/28/02 11 23 <br /> Total Purgeable Hydrocarbons (C6-C10) by EPA 8015B modified, BTEXM by EPA 8021B - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD limit Notes <br /> Batch 2103004-EPA 5030B JPM <br /> Blank (2H23004-BLKI) t Prepared&Analyzed 08/23/02 <br /> Gasoline Range Organics(C6-CIO) ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methvi tert-butyl ether ND 2 5 " <br /> Surrogate o,a,a-Trruaroroluene 880 100 880 70-130 <br /> Laboratory Control Sample(21123004-BSI) - - - Prepared&Analyzed 08/23/02 - - <br /> Benzene 113 0 50 ug/l 10 0 113 70-130 <br /> Toluene 106 0 50 10 0 106 70-130 <br /> Ethylbenzene 103 050 106 103 70-130 <br /> Xylenes(total) 305 0 50 300 102 70-130 <br /> Surrogate o,a a-Triuorotoluene 105 100 105 70-130 <br />�Laboatory Cantrol Sample(2H23004=BS2) _ _ Prepared&Analyzed-08/23/02 <br /> Gasoline Range Organics(C6-C10) 280 50 ugA 250 112 70-130 <br />—Surrogate_aa,o-Tr __154- 70-130_ x_— _TTS-02-fr <br /> Matrix Spike(2H23004-MSI) Source MLH0440-04 Prepared&Analyzed 08/23/02 <br /> Gasoline Range Organics(C6-C10) 1150 50 ug/I 550 610 98 2 60-140 <br /> Benzene 106 050 660 19 132 60-140 <br /> Toluene 64 7 0 50 397 15 125 60-140 <br /> Ethylbenzene 929 0 50 920 ND 95 7 60-140 <br /> Xylenes(total) 444 0 50 461 12 937 60-140 <br /> Surrogate aa,a-Trii luorotoluene 118 100 118 70-130 <br /> Matrix Spike Dup(21123004-MSDI) Source MLH0440-04 Prepared&Analyzed 08/23/02 <br /> Gasoline Range Organics(C6-C10) 1160 50 ug/l 550 610 100 60-140 0 866 25 <br /> Benzene 104 050 660 J9 129 60-140 190 25 <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples analyzed in accordance xith the chain <br /> custody document Unless othenvise stared results are reported on a wet weight hosts <br /> This analytical report must be reproduced in its entirety <br /> Page 23 of 25 <br />