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819 Striker Ave Su <br /> Sequoia Sacramento,CA 958344 <br /> (916)921-9600 <br /> Analytical FAX(916) co 0 <br /> www sequaialabs labs com <br /> t <br /> er-Ryan-Rancho Cordova Project Former Unocal Ol87,Stockton,CA 5301506 <br /> Gold Camp Dr,Ste 170 Project Number NIA Reported <br /> ho Cordova CA,95670 Project Manager Geoffrey D Risse 02/06/03 18 03 <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 3010538-EPA 5030B P/T <br /> Blank(3010538-BLK1) Prepared&Analyzed 01/30/03 <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-Trtfluorotoluene 998 100 100 60-140 <br /> Blank(3010538-BLK2) Prepared&Analyzed 01/31/03 <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 050 " <br /> Obene ND 050 <br /> Iberizene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl Cert-butyl ether ND 2 0 " <br /> Surrogate a a a-Tnfluorotoluene 103 100 103 60-140 <br /> Blank(3010538-BLK3) Prepared&Analyzed 02/05/03 <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-Tnfluorotoluene 912 100 91 60-140 <br /> Laboratory Control Sample(3010538-BS1) Prepared&Analyzed 01/30/03 <br /> Benzene 104 050 u9/1 100 104 70-130 <br /> Toluene 105 050 100 105 70-130 <br /> Ethylbenzene 104 050 100 104 70-130 <br /> Xylenes(total) 313 050 300 104 70-130 <br /> Methyl tert-butyl ether 952 2 0 100 95 70-130 <br /> oia 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 enterery <br /> Page 6 of 9 <br />