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819 Sinker Ave Ste 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical FAX equoi labs2 1 r 00 <br /> www sequoialabs coin <br /> ler-Ryan-Rancho Cordova Project Former Unocal 2859, Stockton,CA S303555 <br /> 40 Gold Camp Dr,Ste 170 Project Number NIA Reported <br /> Rancho Cordova CA,95670 Project Manager Geoffrey D Risse 04/04/03 18 05 <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 Lunit Units Level Result %REC Limits RPD Lutut Notes <br /> Batch 3030405-EPA 5030B(PnD <br /> Blank(3030405-BLK1) Prepared&Analyzed 03/25/03 <br /> Purgeable Hydrocarbons ND 50 u9/1 <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 /> i <br /> Surrogate a a a-Trifluorotoluene 817 100 82 60-140 <br /> Blank(3030405-BLK2) Prepared&Analyzed 03/26/03 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> 0lbne ND 050 <br /> enaene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 0 <br /> Surrogate a a a-Tri luorotoluene 843 100 84 60-140 <br /> Blank(3030405-BLK3) Prepared&Analyzed 03/31/03 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 0 " <br /> Surrogate a a a-Trifluorotoluene 809 100 81 60-140 <br /> Laboratory Control Sample(3030405-BS1) Prepared&Analyzed 03/25/03 <br /> Benzene 907 0 50 upll 100 91 70-130 <br /> Toluene 898 050 100 90 70-130 <br /> Ethylbenzene 896 050 100 90 70-130 <br /> Xylenes(total) 279 050 300 93 70-130 <br /> Methyl Cert-butyl ether 988 2 0 100 99 70-130 <br /> ola 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 oasts <br /> This analytical report must be reproduced in its entirety <br /> Page 5 of 8 <br />