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1551 <br /> strial Road <br /> Sequoia San <br /> uCA94070 <br /> San Carlos CA 9gp70 <br /> Analytical (650)232 9 <br /> FAX(650)232-46i 612 2 <br /> www sequoialabs com <br /> Gettler-RyanlGeostrategteS(I) Project Unocal(4) L208033 <br /> 6747 Sierra Court. Suite J Project Number Former Unocal#0187 Stockton Reported <br /> Dublin CA 94568 Project Manager Deanna}larding 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 Nates <br /> Batch 2H21002 -EPA 5030B IP/TJ <br /> Laboratory Control Sample(21121002-BS2) - _ Prepared&Analyzed 08/21/02 <br /> Gasoline Range Organics(C6-C10) 250 50 ugll 250 100 70-130 <br /> Surrogate a,a,a-Tri luorotoluene 123 100 123 70-134 <br /> Matrix Spike(21121002-MSI) Source NIL110349-06 Prepared&Analyzed 08/21/02 <br /> Gasoline Range Organics(C6-C10) 527 50 ugll 550 ND 958 60-140 <br /> Benzene 119 050 660 ND 180 60-140 QM-07 <br /> Toluene 41 0 050 397 ND 103 60-140 <br /> Ethylbe&ene 982 050 920 ND 107 60-140 <br /> Xylenes(total) , 474 050 461 ND 103 60-140 <br /> Surrogate a a a-Trifluorotoluene 114 100 114 70-130 <br /> Matrix Spike Dup(21121002-MSDI) Source A4LH0349-06 Prepared&Analyzed 08/21/02 <br /> Gasoline Range Organics(C6-C10) 467 50 ugll 550 ND 84 9 60-140 121 25 <br /> Benzene 126 050 660 ND 191 60-140 571 25 QM-07 <br /> Toluene 415 050 397 ND 105 60-140 121 25 <br />�Ethylbenzene 9 86 0 50 " 9 20 ND 10760-140=O 407 25 <br /> Xylenes(total) 476 050 461 ND 103 60-140 0 421 25 <br /> —Surrogate_aaa-Trr�uaratoluene _ 112 " T _10 i7 ___ _ --112- 70-130 m— T <br /> Batch 21121003-EPA 5030B PIT <br /> Blank(2H21003-BLKI) Prepared&Analyzed 08/21/02 <br /> Gasoline Range Organics(C6-C10) ND 50 ug/I <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 25 " <br /> Surrogate a a,a-Tri luorotoluene 105 100 105 70-130 <br /> Sequoia Analytical -San Carlos The results in this report apply to the samples analyzed to accordance with the chain, <br /> custody document Unless otherwise stated results are reported on a we;weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 29 of 36 <br />