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15 <br /> Road <br /> Sequoia an Carl Industrial 4070 <br /> San Carlos CA 94070 <br /> (650)232-8600 <br /> Analytical FAX(650)232-9612 <br /> www sequoialabs com <br /> Gettler-Ryan/Geostrategies(1) Project Unocal(4) L208033 ) <br /> 6747 Sierra Court. 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-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 2H22002 - EPA 5030B JP/T] <br /> Matrix Spike(2H22002-1%1S1) Source MLH0346-01 Prepared&Analyzed 08/22/02 <br /> Surrogate a,a,a-Triuorotoluene 858 ug/1 100 858 70-130 <br /> Matrix Spike Dup(21122002-N1SD1) Source MLH0346-01 Prepared&Analyzed 08/22/02 <br /> Gasoline Range Organics(C6-C10) 469 50 ugA 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 95 7 60-140 3 87 25 <br /> Ethylbenzene 908 050 920 ND 987 60-140 431 25 <br /> Xylenes(total) 443 050 46 1 ND 961 60-140 398 25 <br /> -Surrogate a,a a-Triuorololuene 965 100 965 70-130 <br /> Batch 21122003-EPA 5030B JP/TJ <br /> Blank(2H22003-BLKI) Prepared&Analyzed 08/22/02 <br /> l Gasoline Range Organics(Cb-C10) ND 50 ugll <br /> l Benzene ND 050 " <br /> Toluene -ND-0 50 <br /> Ethylbenzene ND 0 50 " <br />= Xylenes(total) = ND�0 50 <br /> Methyl tert-butyl ether ND 25 " <br /> Surrogate a a a-Trifluorotoluene 116 100 116 70-130 <br /> Laboratory Control Sample(21122003-BSI) Prepared&Analyzed 08/22/02_ <br /> Benzene 945 050 ug/1 100 945 70-130 <br /> Toluene 974 0 50 100 974 70-130 <br /> Ethylbenzene 977 050 100 97 7 70-130 <br /> Xylenes(total) 289 050 300 963 70-130 <br /> Surrogate aaa-Triuorotoluene 109 100 109 70-130 <br /> r <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples analysed in accordance with the chain a <br /> 0 <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entireq, <br /> Page 33 of 36 <br />