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819 Sinker Ave Ste 8 <br /> ID Sequoia 5. ,CA 9295834 <br /> (916)921-9600 <br /> W Analytical www seq 6) labs co 0 <br /> s«,,roiali,>>s <br /> r-Ryan-Dublin Project Fortner Unocal 2859,Stockton,CA S305466 <br /> 6 S <br /> Sierra Court,Ste J Project Number NIA Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 06/03/03 18 41 <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 Rest It -,/.RFC Limits RPD Lunt Notes <br /> Batch 3050448-EPA 5030B <br /> Blank(3050446-BLKI) Prepared&Analyzed 05/23/03 <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 /> Surrogate a,a a-Tri luorotoluene 919 100 93 60-140 <br /> Blank(3050448-BLK2) Prepared&Analyzed 05/27/03 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> ND 050 " <br /> *Etnzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl ten-butyl ether ND 20 " <br /> Surrogate a a a-Trt luorotoluene 952 100 95 60-140 <br /> Laboratory Control Sample(3050448-BS1) Prepared&Analyzed 05/23/03 <br /> Benzene 102 050 ug/l 100 102 70-130 <br /> Toluene 103 050 100 103 70-130 <br /> Ethylbenzene 998 050 100 100 70-130 <br /> Xylenes(total) 305 050 300 102 70-130 <br /> Methyl tert-butyl ether 796 20 100 80 70-130 <br /> Surrogate a,a,a-Trifluorotoluene 915 " 100 92 60-140 <br /> Laboratory Control Sample(3050448-BS2) Prepared&Analyzed 05/27/03 <br /> Benzene 110 050 ug/l 100 110 70-130 <br /> Toluene 110 050 100 110 70-130 <br /> Ethylbenzene 109 050 100 109 70-130 <br /> Xylenes(total) 334 050 300 111 70-130 <br /> Methyl cert-butyl ether 914 20 100 91 70-130 <br /> oia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the churn 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 />