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819 Sinker Ave Ste 8 <br /> Sacramento CA 95834 <br /> 4DSequoia (916)921-9600 <br /> FAX(916)921-0100 <br /> 1W Analytical VrWW sequoialabs com <br /> Gettler-Ryan-Dublin Project Fortner Unocal 2859,Stockton,CA 5308609 <br /> 6747 Sierra Court,Ste J Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 09/11/03 14 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 3090002-EPA 5030B PIT <br /> Matrix Spike(3090002-MSI) Source 5308609-02 Prepared&Analyzed 09/02/03 <br /> Benzene 971 050 ugll 100 ND 97 60-140 <br /> Toluene 991 050 100 ND 99 60-140 <br /> Ethylbenzene 968 050 100 ND 97 60-140 <br /> Xylenes(total) 30 1 050 300 ND 100 60-140 <br /> Methyl tent-butyl ether 110 20 100 042 106 60-140 <br /> Surrogate a a a-Tris luorotoluene 103 100 103 60-140 <br /> Matrix Spike Du (3090002-MSDI) Source 5308609-02 Prepared&Analyzed 09/02/03 <br /> Benzene 974 050 ug11 10 0 ND 97 60-140 0 3 25 <br /> Toluene 999 050 100 ND 100 60-140 08 25 <br /> Ethylbenzcne 968 050 10 0 ND 97 60-140 0 25 <br /> Xy�(total) 302 050 300 ND 101 60-140 0 3 25 <br /> M ert-butyl ether 946 2 0 10 0 042 90 60-140 IS 25 <br /> Surrogate a a a-Trifluorotoluene 105 100 105 60-140 <br /> Batch 3090015-EPA 5030B PIT) <br /> Blank(3090015-BLKI) Prepared&Analyzed 09/02/03 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tent-butyl ether ND 2 0 <br /> Surrogate a a a-Trifluorotoluene 828 100 83 60-140 <br /> Blank(3090015-BLK2) Prepared&Analyzed 09/03/03 <br /> Purgeable Hydrocarbons ND 50 ug/I <br /> Benzene ND 0 50 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tent-butyl ether ND 2 0 <br /> Surrogate a a a-Trifluorotoluene 831 100 83 60-140 <br /> Sala Analytical - Sacramento The results in this report 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 analytical report must be reproduced in its entirety <br /> Page 16 of 20 <br />