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819 Striker Ave Ste 8 <br /> DSequoia Sacramento,CA 95834 <br /> WO FAX Analytical (916)921-9600 <br /> (916)921-0100 <br /> Gettler-Ryan-Dublin Protect Former Unocal 0187,Stockton,CA 5211332 - <br /> 6747 Sterna Court,Ste ] Project Number N/A Reported, <br /> Dublin CA,94568 Project Manager Deanna L Harding 12/27/02 17 49 <br /> Total Purgeable Hydrocarbon,BTEX and MTBE by DHS LUFT- Quality Control <br /> Sequoia Analytical -Sacramento <br /> Reporting Spike Source %REC RPD <br /> lAnalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2110219-EPA 5030B(P/T) <br /> Blank_(21102_19-BLKS) _ Prepared&Analyzed 11/_20/0_2 <br /> Methyl tert-butyl ether ND 2 5 119/1 <br /> Surrogate a,a,a-Triuorotoluene 831 100 83 60-140 <br /> Laboratory Control Same(2110219-BSI) Prepared&Analyzed 11/14/02 <br /> Benzene 971 050 119/1 100 97 70-130 <br /> Toluene 967 0 50 100 97 70-130 <br /> Ethylbenzene 974 050 100 97 70-130 <br /> Xylenes(total) 294 0 50 300 98 70-130 <br /> Methyl Cert-butyl ether 104 25 100 104 70-130 <br /> Surrogate a,a,a-Trifluorotoluene — 103 - 100 = _ -103 60-140 <br /> Laboratory Control Sample(2170219-BS3) Prepared&Analyzed 11/15/02 <br /> BC11tene 9 58 050 119,1 100 96 70-130 <br /> Toluene 9 53 0 50 100 95 70-130 <br /> _Ethylbenzene _ 9 51 0 50 ]Go __95 70-130 <br /> Xylenes(total) 290 050 300 97 70-130 <br />=--Methyl ter(-butyl ether_ -- __10 3 _2 5__" 10 0 ---.103_7Q--130— <br />-- Surrogate a,-a;a-Tr�uorotoluene- -- -- " —10 0�- — --101---60=140-`-T-- — ---- ---w— <br /> Laboratory Control Sample 2110219-BS6 Prepared& Analyzed 11/19/02 <br /> Benzene 8 87 0 50 u8/1 10 0 89 70-130 <br /> Toluene 8 77 0 50 100 88 70-130 <br /> Ethylbenzene 871 0 50 100 87 70-130 <br /> Xylenes(total) 264 0 50 300 88 70-130 <br /> Methyl tert-butyl ether 941 25 100 94 70-130 <br /> Surrogate a,a,a-Trifluorotoluene 936 100 94 60-140 <br /> Laboratory Control Sample(2110219-BS7) Preeared&Analyzed 11/20/02 _ <br /> Benzene 8 93 0 50 119/1 100 89 70-130 <br /> Toluene 8 85 050 " 100 88 70-130 <br /> Sequoia Analytical-Sacramento The results in this i epoi t apply to the samples analyzed in accordance with the ch <br /> of custody document Unless otherwise stated, results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> 26 of 41 <br />