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Ind <br /> a— ) <br /> fn C tion nal Road <br /> Sequoia San catlos CA 94U70 <br /> 1650)232-9600 <br /> W Analytical FAX(650)232-9612 <br /> 1 www sequolalabs corn <br /> 4yer-Ryan/Geostrategtes(I) Project Unocal(4) L208029 <br /> Sierra Court Suite J Project Number Fortner Unocal#2859 Stockton Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 08/28/02 11 23 <br /> I <br /> 'Dotal Purgeable Hydrocarbons (C6-C10) by EPA 8015B modified, BTEXM by EPA 8021B - Quality Control <br /> Sequoia Analytical - Morgan H111 <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Lunns RPD Limit Notes <br /> Batch 2H22002 - EPA 5030B IP/T) <br /> Matrix Spike(2H22002-AISI) Source MLH0346-01 Prepared&Analyzed 08/22/02 <br /> Gasoline Range Organics(C6-C10) 477 50 ugA 550 ND 867 60-140 <br /> Benzene 109 050 660 ND 164 60-140 QM-07 <br /> Toluene 395 0 50 397 ND 995 60-140 <br /> Ethylbenzene 948 050 920 ND 103 60-140 <br /> Xylenes(total) 461 0 50 461 ND 100 60-140 <br /> I <br /> Surrogate a a,a-Trifluorotoluene 858 100 858 70-130 <br /> Matrix Spike Du (2122002-N ISD1) Source MLH0346-01 Prepared&Analyzed 08/22/02 <br /> Gasoline Range Organics(C6-00) 469 50 ugfl 550 ND 853 60-140 1 69 25 <br /> Benzene 109 050 " 660 ND 164 60-140 000 25 QM-07 <br /> Toluene 380 050 397 ND 957 60-140 387 25 <br /> 0'enzene 9 08 050 920 ND 987 60-140 431 25 <br /> s(total) 443 050 461 ND 961 60-140 398 25 <br /> Surrogate a a a-Trij7uorotoluene 9 65 100 965 70-130 <br /> Batch 2122004 -EPA 5030B JP/TJ <br /> Blank(2H22004-BLKI) Prepared&Analyzed 08/22/02 <br /> Gasoline Range Organics(C6-C10) ND 50 ugfl <br /> Benzene ND 0 50 " <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 a,a-Trifluorotoluene 117 100 117 70-130 <br /> Laboratory Control Sample(2H22004-BSI) Prepared&Analyzed 08/22/02 <br /> Benzene 114 050 ug/l 100 114 70-130 <br /> Toluene 107 050 100 107 70-130 <br /> Ethylbenzene 103 050 100 103 70-130 <br /> Xylenes(total) 306 050 300 102 70-130 <br /> 1a Analytical -San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless othemuse stated,results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 20 of 25 <br />