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819 Striker Avenue Suite 8 <br /> Sequoia Sacrarxt C 95834 <br /> (9191 6)922 1 9600 <br /> fAX(916)921-0100 <br /> Analytical www sequoialabs corn <br /> Gettler-Ryan-Rancho Cordova Project Unocal 0123,Tracy CA <br /> 3164 Gold Camp Dr Ste 240 Project Number NIA Reported <br /> Rancho Cordova CA 95670 Project Manager David Herzog 12/04/00 13 58 <br /> Industrial Solvents by EPA Method 8015 (modified) - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analvte Result Limit Units Level Result % c Limits RPD Limit Notes <br /> Batch OK22035- EPA 3810 Heads ace <br /> Blank(OK22035-BLKI) Prepared 11/22/00 Analyzed 11/24/00 <br /> Methanol NO 100 mg/kg <br /> Surrogate I-pentanol 4 71 500 942 31-166 <br /> Surrogate I pentanol Obwax) 1 20 500 240 49-166 S-03 <br /> LCS(OK22035-BSI) _ Prepared 11/22/00 Analyzed 11/24/00 <br /> Methanol W 894 1 00 mg/kg Soo 112 70-130 <br /> Surrogate I pentanol 600 500 120 31-166 <br /> Surrogate I-pentanol(dbwax) 168 500 336 49-166 S03 <br /> Matrix Spike(OK22035-MSI) Source MJK0428-25 Prepared 11/22/00 Analyzed 11124/00 <br /> Methanok 845 100 mg/kg 900 ND 984 50-150 <br /> Surrogate 1-pentanol 6 17 500 113 31-166 <br /> Surrogate I-pentanol(dbwax) 403 500 806 49-166 <br /> Matrix Spike Dup(OK22035-MSD1) Source MJK0428-25 Prepared 11/22/00 Analyzed 11/24/00 <br /> Methanol 787 100 mg/kg 800 ND 91 2 50-150 7 11 50 <br /> Surrogate 1-pentanol 633 500 117 31-166 <br /> Surrogate 1 pentanol(dbwax) 343 500 686 49-166 <br /> 16 <br /> Sequoia Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 14 of 15 <br />