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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> 5:- Analytical FAX(916)921-0100 <br /> Gettler-Ryan-Rancho Cordova Project Unocal 0123,Tracy,CA Sampled 1112100 <br /> 3164 Gold Camp Dr,Ste 240 Project Number NIA Received 1112100 <br /> Rancho Cordova,CA 95670 Project Manager David Herzog Reported 1/19,27100 <br /> Volatile Oxygenate Compounds by EPA Method 8260A/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> [Anal2Le- Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 0010122 Date Prepared 1114100 Extraction Method EPA 5030B IPIT <br /> Blank 0010122-BLK2 <br /> Tert-butyl alcohol 1/14100 ND ugll 200 <br /> Methyl tert-butyl ether " ND 200 <br /> Di-isopropyl ether ND 200 <br /> Ethyl tert-butyl ether ND 200 <br /> Tert-amyl methyl ether ND 200 <br /> Ethanol " ND " 3000 <br /> Surrogate 1,2-DCA-d4 500 640 600-140 128 <br /> Batch 0010126 Date Prepared 1/13100 Extraction Method EPA 5030B McOH <br /> Blank 0010126-BLKI <br /> Tert-butyl alcohol 1113100 ND mg/kg 10 0 <br /> Methyl tert-butyl ether ND 0 100 <br /> -isopropyl ether ND 0 100 <br /> tert-butyl ether ND 0 100 <br /> rt-amyl methyl ether ND 0100 <br /> Ethanol ND 150 <br /> Surrogate 1 2-DCA-d4 250 283 600-140 113 <br /> LCS 0010126-BS1 <br /> Methyl tert-butyl ether 1/13/00 250 <br /> 2 56 mg/kg 70 0-130 102 _ <br /> Surrogate 1,2-DCA-d4 250 2 78 600-140 111 <br /> Matrix Spike 0010126-MSI S001128-01 <br /> Methyl tert-butyl ether 1113100 250 ND 244 mg/kg 60 0-140 97 6 <br /> Surrogate 12-DCA-d4 250 2 77 600-140 111 <br /> Matrix Spike Duo 0010126-MSD1 S001128-01 <br /> Methyl tert-butyl ether 1113100 250 ND 274 <br /> mg/kg 60 0-140 110 25 0 11 9 <br /> Surrogate 1,2-DCA-d4 250 309 600-140 124 <br /> aeuoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 14 of 17 <br />