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819 Striker Ave Ste 8 <br /> 4DSequoia Sacramento, <br /> A99600 <br /> iW Analytical FAX(916)921-0100 <br /> www.wquoialabs.com <br /> Gettler-Ryan-Rancho Cordova Project: Former Unocal 0187, Stockton,CA S308456 <br /> 3140 Gold Camp Dr.,Ste, 170 Project Number: N/A Reported: <br /> Rancho Cordova CA,95670 Project Manager: Geoffrey D.Risse 09/08/03 15:29 <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 Notea <br /> Batch 3080298_EPA 5030B(PIT) <br /> Blank(3080298-BLKI) Prepared&Analyzed:08/21/03 <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Methyl trrt-butyl ether ND 2.0 " <br /> Surrogate:a,aa-Trifluorotoluene 9.09 10.0 91 60-140 <br /> Blank(3080298-BLK2) Prepared&Analyzed:08/22/03 <br /> Purgeable Hydrocarbons ND 50 ugA <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 " <br /> thylbenzene ND 0.50 <br /> ylenes(total) ND 0.50 " <br /> Methyl tert-butyl ether ND 2.0 " <br /> Surrogate. a,a,a-Triuorotoluene 8.03 10.0 80 60-140 <br /> Blank(3080298-BLK3) Prepared&Analyzed:08/25/03 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 <br /> Xylenes(total) ND 0.50 " <br /> Methyl tert-butyl ether ND 2.0 " <br /> Surrogate:a,a,a-Trlfluorotoluene 8.71 10.0 87 60-140 <br /> Blank(3080298-BLK4) Prepared&Analyzed:08/26/03 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Methyl tert-butyl ether ND 2.0 " <br /> Surrogate:a,a,a-Trifluorotoluene 8.12 10.0 81 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 6 of 9 <br />