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1551 Industrial Road <br /> Sequoia San Carlos,CA 94070 <br /> (650)232-9600 <br /> Analytical FAX(650)2 2 <br /> www sequoialabsbs co coin <br /> Gettler-Ryan/Geostrategies(1) Project Unoca](4) L208033 <br /> 6747 Sierra Cour, Suite 3 Project Number Former Unocal#0187,Stockton Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 08/29/02 07 10 <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 /> IAnalvte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2)120039- EPA 5030B JP/TJ <br /> Blank(2H20039-BLKI) Prepared&Analyzed 08/20/02 <br /> Gasoline Range Organics(C6-C10) ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a aa-Triuorotoluene 112 100 112 70-130 <br /> Laboratory Control Sample(2H2O039-BSI) Prepared&Analyzed 08/20/02 <br /> Benzene 102 050 ug/l too 102 70-130 <br /> Toluene 104 050 100 104 70-130 _ <br /> Ethylbenzene - 104 _ 050 l too 104 70-130 _ <br /> Xylenes(total) 31 1 050 300 104 70-130 <br /> Surrogate a a a-Triuorotoluene 110 100 110 70-130 <br /> Laboratory Contfol Sample(2H2O039-BS2) Prepared&Analyzed-08/20/02 <br /> Gasoline Range Organics(C6-C10) 261 50 ug/l 250 104 70-130 <br /> —Surrogate aaa-Triuorotoluene, ,�T t _ — 122 _ _ ^� _T_ _=-10 0 R __112 r_70-130 <br /> Laboratory Control Sample Dup (2H2O039-BSDI) Prepared 08/20/02 Analyzed 08/21/02_ <br /> Benzene 107 050 ug/1 100 107 70-130 4 78 25 <br /> Toluene 110 050 too 110 70-130 561 25 <br /> Ethylbenzene 109 050 " 100 109 70-130 469 25 <br /> Xylenes(total) 32 4 050 300 108 70-130 409 25 <br /> Surrogate o a,a-Trifluorotoluene 109 100 109 70-130 <br /> Laboratory Control Sample Du (2H2O039-BSD2) Prepared 08/20/02 Analyzed 08/21/02 <br /> Gasoline Range Organics(C6-C10) 208 50 ug/l 250 832 70-130 226 25 <br /> Surrogate a a a-Triuorotoluene 118 100 118 70-130 <br /> Sequoia Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the chain <br /> custody document Unless whenvise staled results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 25 of 36 <br />