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Indu <br /> San <br /> C TIOS, A Road <br /> a_ _� <br /> Sequoia San Carlos,CA 94070 <br /> (650)232-9600 <br /> Analytical FAX(650)232-9612 <br /> www seyuoialabs com <br /> ler-Ryan/Geostrategies(l) Project Unocal(4) L208033 <br /> Sierra Court, Suite J 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 Lunit Units Level Result %R£C Limits RPD Limit Notes <br /> Batch 2142]00] -EPA 5030B 1P/T1 <br /> Matrix Spike(21421001-MSI) Source M11-110349-07 Prepared 08/21/02 Analyzed 08/22/02 -_ <br /> Surrogate aaa-Triuorotoluene 108 ug/l /00 108 70-130 <br /> Matrix Spike Dup(21121001-MSDI) Source MLH0349-07 Prepared 08/21/02 Analyzed 08/22/02 <br /> Gasoline Range Organics(C6-C10) 426 50 ug/I 550 ND 775 60-140 212 25 <br /> Benzene 113 0 50 660 1 1 155 60-140 545 25 QM-07 <br /> Toluene 45 7 0 50 397 ND 115 60-140 266 25 <br /> Ethylbenzene 100 0 50 920 ND 107 60-140 2 02 25 <br /> Xylenes(total) 51 5 050 461 ND 112 60-140 216 25 <br /> Surrogate a,a a-Trtfluorotoluene 115 100 115 70-130 <br /> 2H21002 - EPA 5030B PIT <br /> AW(2H21002-BLKI) Prepared&Analyzed 08/21/02 <br /> Gasoline Range Organics(C6-C10) ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Etbylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tent-butyl ether ND 25 " <br /> Surrogate a,a a-Triuorotoluene 110 100 110 70-130 <br /> Laboratory Control Sample(2H21002-BS1) Prepared&Analyzed 08/21/02 <br /> Benzene 107 0 50 ug/1 �100 107 70-130 <br /> Toluene 10 7 0 50 JOG 107 70-130 <br /> Ethylbenzene 104 0 50 ]0 0 104 70-130 <br /> Xylenes(total) 32 1 0 50 300 107 70-130 <br /> Surrogate a a a-Trrfluorololuene 105 100 105 70-130 <br /> �la Analytical - San Carlos The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document Unless othervise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 28 of 36 <br />