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Road <br /> Sequoia 1551 nCarlo u CA 94070 <br /> (D (650) <br /> San Carlos CA 98470232-9600 <br /> Analytical FAX(650)232 9612 <br /> www sequotalabs corn <br /> Gettler-Ryan/G eostrategies(l) Project Unocal(4) L208033 <br /> 6747 Sierra Cour[, Suite] Project Number Former Unocal##0187 Stocl,ton 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 /> IAnalvte Result Lunit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2H2O041 -EPA 5030B lP/Tl <br /> Laboratory Control Sample Dup (2H2O041-BSD2) Prepared 08/20/02 Analyzed 08/21/02 - <br /> Gasoline Range Organics(C6-C10) 254 50 ug/1 250 102 70-130 462 25 <br /> Surrogate a,a a-Trfluorotoluene 735 100 735 70-130 <br /> Batch 2H21001 - EPA 5030B IP/Tl <br /> Blank (2H21001-BLKI) Prepared&Analyzed 08/21/02 <br /> Gasoline Range Organics(C6-00) ND 50 ug/I <br /> Benzene NO 050 " <br /> Toluene NO 050 <br /> Ethylbenzene NO 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl Cert-butyl ether = = ND- - 25 -" - --- - – - <br /> Surrogate a a a-Triuorotoluene 984 100 984 70-130 <br /> Laboratory Control Sample(2H21001-BSI) Prepared&Analyzed 08/21/02 <br /> Benzene —11 0 0 50—._.ug/! 10 0 110 70-130 <br /> Toluene 11 1 050 100 HI 70-130 <br />�Ethylbenzene ---- –105`____--050 -" 100 —105r-70-130 <br /> Xylenes(total) 33 9 050 300 113 70-130 <br /> Surrogate a,a,a-Trfluorotoluene 113 100 113 70-130 <br /> Laboratory Control Sample(2H2I001-BS2) Prepared&Analyzed 08/21/02 <br /> Gasoline Range Organics(C6-C10) 246 50 ugA 250 984 70-130 <br /> Surrogate a a,a-Trfluorotoluene 107 100 107 70-130 <br /> Matrix Spike(2H21001-A7S1) Source ML110349-07 Prepared 08/21/02 Analyzed 08/22/02 <br /> Gasoline Range Organics(C6-C10) 527 50 ug/l 550 ND 958 60-140 <br /> Benzene 107 0 50 660 1 1 145 60-140 QM-07 <br /> Toluene 44 5 0 50 397 NO 112 60-140 <br /> Ethylbenzene 980 050 920 NO 105 60-140 <br /> Xylenes(total) 504 050 461 ND 109 60-140 <br /> Sequoia Analytical- San Carlos The results in this report apply to the samples analy2ed in accordance with the chain o1 <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analwical report must be reproduced in its enrirery <br /> Page 27 of 36 <br />