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619 Sinker Ave Ste 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-96w <br /> � Analytical www <br /> Seq 6) labSc m <br /> www sequoialabs com <br /> T� <br /> w <br /> Gettler-Ryan-Dublin Project Former Unocal 2859,Stockton,CA 5308609 <br /> 6747 Sierra Court,Ste I 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 5030E P <br /> Blank(3090002-BLK1) Prepared&Analyzed 09/02/03 <br /> Purgeable Hydrocarbons ND 50 ug/I <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 20 " <br /> Surrogate a,a,a-Triiluorotoluene 973 100 97 60-140 <br /> Blank(3090002-BLK2) Prepared&Analyzed 09/03/03 - <br /> Purgeable Hydrocarbons ND 50 ugA <br /> Benzene ND 0 50 " <br /> Toluene _ ND 0 50 - • <br /> Ethylbenzene ND 0 50 <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 0 " <br /> Surrogate a,a a-Trifluorotoluene 107 100 107 60-140 <br />_=Laboratory Control Sample(3090002-BS1) Prepared&—Analyzed-09/02/03 <br /> Benzene 102 0 50 ug/l 1100 102 70-130 <br /> 103-----0 50-- „-- 100-- —103--70=130--- - - - -- - - -- <br /> Ethylbenzene 101 050 100 101 70-130 <br /> Xylenes(total) 314 0 50 300 105 70-130 <br /> Methyl tert-butyl ether 821 2 0 100 82 70-130 <br /> Surrogate a a a-Triuorotoluene 104 100 104 60-140 <br /> Laboratory Control Sample(3090002-BS2) Prepared&Analyzed 09/03/03 <br /> Benzene 999 0 50 u9A 100 100 70-130 <br /> Toluene 101 0 50 100 101 70-130 <br /> Ethylbenzene 976 050 100 98 70-130 <br /> Xylenes(total) 304 0 50 300 101 70-130 <br /> Methyl tert-butyl ether 110 2 0 100 110 70-130 <br /> Surrogate a a a-Trifluorotoluene 100 100 100 60-140 <br /> Sequoia 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 15 of 20 <br />