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Road <br /> a_� (650)Sequoia an C 1`105 Cal 4070 San Carlos Cq 94070Analytica1 232-9600 <br /> FAX(650)232-9612 <br /> www sequotalabs Cvm <br /> Gettler-11yan/Geostrategies(1) Project Unocal(4) L208033 <br /> 6747 Sierra Court Suite J Project Number Former Unocal 40187 Stockton Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 08/29/02 07 10 <br /> Total Purgeable Hydrocarbons (C6-C10) by EPA 801513 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 %REC Limits RPD Limit Notes <br /> Batch 21421004- EPA 5030B JP/T] <br /> Blank(2H21004-BLKI) f Prepared&Analyzed 08/21/02 r - <br /> Toluene ND 050 ug/l <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl ten-butyl ether ND 25 " <br /> Surrogate a a a-Trifluorololuene 106 J00 106 70-130 <br /> Laboratory Control Sample(2H21004-BSI) Prepared&Analyzed 08/21/02 <br /> Benzene 12 6 050 ug/I 100 126 70-130 <br /> Toluene r 117 050 100 117 70-130 <br /> Ethylbenzene 11 4 050 100 114 70-130 <br /> Xylenes(total) 33 6 050 300 112_ 70-130 <br /> Surrogate a a a-Triuorotoluene 11.5 100 115 70-130 <br /> Laboratory Control Sample(2H21004-BS2) Prepared&Analyzed 08/21/02 <br /> Gasoline Range Organics(C6-C10) 283 50 ug/I 250 113 70-130 <br /> Surrogate a a a-Tri luorotoluette 160 100 160 70-130 S-02 <br />-~--Matrix Spike(2H21004-MS1)- -- —_ - — =--Source L208033-31 <br />