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819 Striker Ave Ste 8 <br /> Sacramento,CA 95834 <br /> 4DSequoia (916)921-9600 <br /> 100 <br /> 1W Analytical wwseqFAX oialab com <br /> www sequoielabs win <br /> Ryan-Dublin Project Former Unocal 2859,Stockton,CA 5305466 <br /> 6 Sierra Court,Ste ] Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 06/03/03 18 41 <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 Lunit Units Level Result %REC Limits RPD Luna Nates <br /> Batch 3050464-EPA 5030B(P <br /> Laboratory Control Sam le(3050464-BS1) Prepared&Analyzed 05/28/03 <br /> Benzene 988 050 ug(l 100 99 70-130 <br /> Toluene 977 050 100 98 70-130 <br /> Ethylbenzene 988 050 100 99 70-130 <br /> Xylenes(total) 301 050 300 100 70-130 <br /> Methyl tert-butyl ether 847 20 100 85 70-130 <br /> Surrogate a a a-Trijluorotoluene 967 100 97 60-140 <br /> Laboratory Control Sample(3050464-BS2) Prepared&Analyzed 05/29/03 <br /> Benzene 102 050 ug/l too 102 70-130 <br /> Toluene 104 050 too 104 70-130 <br /> Ethylbenzene 102 050 too 102 70-130 <br /> (total) 31 1 050 300 104 70-130 <br /> M tent-butyl ether 9 64 2 0 100 96 70-130 <br /> Surrogate a a a-TriJluorotoluene 941 100 94 60-140 <br /> Laboratory Control Sample(3050464-BS3) Prepared&Analyzed 05/30/03 <br /> Benzene 988 050 ug/l 100 99 70-130 <br /> Toluene 9 80 050 Wo 98 70-130 <br /> Ethylbenzene 998 0 50 too 100 70-130 <br /> Xylenes(total) 301 0 50 300 100 70-130 <br /> Methyl tert-butyl ether 105 2 0 too 105 70-130 <br /> Surrogate a a a-TnJluorotoluene 919 100 92 60-140 <br /> is Analytical- Sacramento The results in this report apply to the simples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 17 of 20 <br />