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819 Sinker Ave Ste 8 <br /> sequoia Sacramento 9295834 <br /> 9 (916)921-9600 <br /> Analytical www <br /> (916) 0 <br /> scquoialabs bs co oom <br /> Gettler-Ryan-Dublin Project Former Unocal 0187,Stockton,CA y S302221 <br /> 6747 Sterna Court,Ste J Project Number NIA Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 02/28/03 19 02 <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 3020192-EPA 5030B (PIT <br /> Matrix Spike(3020192-MS1) c Source-S302185-02 Prepared&Analyzed 02/20/03 <br /> Methyl tent-butyl ether 110 20 ug/l too ND 110 60-140 <br /> Surrogate a a a-TriJluorotoluene 112 100 112 60-140 <br /> I <br /> Matrix Spike Dup(3020192-MSD7) Source S302185-02 Prepared& Analyzed 02/20/03 _ <br /> Benzene 8 96 050 uSA too ND 90 60-140 1 25 <br /> Toluene 106 0 50 100 ND 106 60-140 2 25 <br /> Ethylbenzene 109 0 50 10 0 ND 109 60-140 0 25 <br /> Xylenes(total) 292 0 50 30.0 ND 97 60-140 0 3 25 <br /> Methyl tent-butyl ether 110 2 0 too ND 110 60-140 0 25 - <br />- "Surrogate a a a-TriJluorotoluene _ _ _I i 3_ _ - _ _ 100 113 60-140 <br /> Batch 3020205-EPA 5030B(PIT <br /> Blank(3020205-BLKl) Prepared&Analyzed 02/14/03 <br /> Purgeable Hydrocarbons ND 50 ug/I <br /> Benzene- - -- - ND— 0 50— <br /> Toluene ND 0 50 " <br />�Ethylbenzene - --- -,-- --= ----- ND-- ==0 50= "-- <br /> xylenes(total) ND 050 " <br />- - Methyl tert-butyl ether '_ - --- --- -- - s ND ' v � 2 U - „--- ----- -- - Y--- - - --------- ---_ -- --- - -- - - ---- <br /> Surrogate a a a-Tri/Tuorotoluene 857 )Go 86 60-140 <br /> Blank(3020205-BLK2) Prepared 02/18/03 Analyzed 02/19/03 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene NO 050 <br /> Toluene G ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyi ether ND 20 " <br /> Surrogate a a a-Trrrjluorotoluene 8 75 100 88 60-140 <br /> Sequoia Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain <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 25 of 33 <br />