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819 Striker Ave Ste 8 <br /> Sacramento CA 95834 <br /> 41) Sequoia (916)921-9600 <br /> FAX(916)921-0100 <br /> I%W Analytical www sequoiatabs com <br /> Ryan-Dublin Project Former Unocal 2859,Stockton,CA S303055 <br /> 67 Sterra Court,Ste J Project Number NIA Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 03/19/03 18 34 <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(PIT <br /> Laboratory Control Sample(3030129-BS3) Prepared&Analyzed 03/12/03 <br /> Matrix Spike(3030129-MSI) Source S303055-08 Pre ared& Analyzed 03/10/03 <br /> Benzene 963 050 ugll 100 ND 96 60-140 <br /> Toluene 945 050 100 ND 94 60-140 <br /> Ethylbenzene 917 050 100 ND 92 60-140 <br /> Xylenes(total) 281 050 300 ND 94 60-140 <br /> Methyl tert-butyl ether 935 20 100 ND 94 60-140 <br /> Surrogate a a a-TriJluorotoluene 946 100 95 60-140 <br /> Matrix Spike Du (3030129-MSDI) Source-S303055-08 Prepared& Analyzed 03/10/03 <br /> Benzene 979 050 ugll 100 ND 98 60-140 2 25 <br /> T 9 64 050 100 ND 96 60-140 2 25 <br /> Et enzene 934 050 100 ND 91 60-140 2 25 <br /> Xylenes(total) 28 5 0 50 100 ND 95 60-140 1 25 <br /> Methyl tert-butyl ether 976 2 0 10 0 ND 98 60-140 4 25 <br /> Surrogate a a a-TriJluorotoluene 949 100 95 60-140 <br /> oia Analytical -Sacramento The results in this repot r apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stared r esults m e r eported on a wet weight basis <br /> This analytical report must be repo oduced in its entirety <br /> Page 20 of 24 <br />