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819 Striker Ave Ste 8 <br /> 4D Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> www sequoialabs com <br /> fri <br /> ler-Ryan-Rancho Cordova Project Former Unocal 2859,Stockton,CA S301507 <br /> 0 Gold Camp Dr,Ste 170 Project Number NIA Reported <br /> cho Cordova CA,95670 Project Manager Geoffrey D Rlsse 02/05/03 17 48 <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 /> Ayre Result Lunt Uruts Level Result %REC Limits RPD Limit Notes <br /> Batch 3010455-EPA 5030B PfF <br /> Blank(3010455-BLK1) Prepared&Analyzed 01/28/03 <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 tert-butyl ether ND 2 0 " <br /> Surrogate a a a-Trifluorotoluene 995 100 100 60-140 <br /> Blank(3010455-BLK2) Prepared&Analyzed 01/30/03 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> �ene ND 050 <br /> benzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 0 " <br /> Surrogate a a a-rrt luorotoluene 949 100 95 60-140 <br /> Blank(3010455-BLK3) Prepared&Analyzed 01/31/03 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 2 0 " <br /> Surrogate a a a-Trtfluorotoluene 102 100 101 60-140 <br /> Laboratog Control Sample(3010455-BS1) Prepared&Analyzed 01/28/03 <br /> Benzene 9 72 050 ug/l 100 97 70-130 <br /> Toluene 972 050 100 97 70-130 <br /> Ethylbenzene 972 0 50 100 97 70-130 <br /> Xylenes(total) 275 050 300 92 70-130 <br /> Methyl tent-butyl ether 968 20 100 97 70-130 <br /> ora 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 5 of 7 <br />