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819 Sinker Ave Ste a <br /> Sequoia <br /> ' <br /> F�#J"�' Sacramento CA 95634 <br /> (916)923-960p <br /> Analytical FAX(916)921-0100 <br /> WWW sequoialabs corn <br /> Gettler-Ryan-Dublin Project Former Unocal 2859,Stockton,CA S303055 <br /> 6747 Sierra Court,Ste J Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 03/19/03 18 34 <br /> ' n <br /> Gasoline (2-Methylpentane to 1,2,4-Trimethylbenzene) and BTEX by EPA 8015M and 8021B - Quality Contr <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3030129-EPA 5030B(IRM <br /> Blank(3030129-BLK3) - _ T` 1 Prepared&,Analyzed 03/12/03 <br /> Purgeable Hydrocarbons ND 50 ug/I <br /> Benzene ND 050 " <br /> Toluene ND, 0 50 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Meshy]tert-butyl ether 3 ND 20 " <br /> Surrogate a a a-TriJluorotoluene 101 100 u 102 60-140 <br /> _ <br /> Laboratog Control Sample(3030129-BSI) - - Prepared& Analyzed 03/10/03 - <br /> Benzene 956 050 UFA 100 96 70-130 <br /> Toluene z 1939 0 50 100 94 70-130 ry _ <br /> Ethylbenzene 923 0 50 100 92 70-130 <br /> Xylenes(total) 28 2' 050 300 94 70-130 <br /> Methyl tert-butyl ether 9 16 2 0 100 92 70-130 <br /> Surrogate a a a-TrrJluorotoluene 943 100 94 60-140 <br />.—Laboratory Control Sample(3030129-BS2) Prepared& Analyzed 03/11/03 <br /> Benzene 940 0 50 USA 100 94 70-130 ,�w <br /> T Toluene---_ --- — ---_- — — 944=- =--050— —" ��_5100.�� _ T <br /> —.94 �.- 70-130,=-- <br /> Ethylbenzene 914 0 50 100 91 70-130 <br /> Xylenes(total) 280 050 300 93 70-130 <br /> Methyl tert-butyl ether 103 2 0 100 103 70-130 <br /> Surrogate a a a-TrrJluorotoluene 917 100 93 60-140 <br /> Laboratory Control Sample(3030129-BS3) IPrepared& Analyzed 03/12/03 <br /> Benzene 932 0 50 UFA 100 �93 70-130 <br /> Toluene 945 0 50 100 94 70 130 <br /> Ethylbenzene 910 050 1010 91 70 130 <br /> Xylenes(total) 280 0 50 1100 93 70-130 <br /> Methyl tent-butyl ether 102 20 10 0 102 70-130 <br /> Sur rogare a a a-TrtJluot oroluene 914 100 91 60-140 <br /> Sequoia Analytical - Sacramento The results in this repro t apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analyncaI repo)t must be reproduced in its entirety <br /> Page 19 of 24 <br />