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Sequoia 680 Chesapeake Drive Redwood CityCA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Sequoia Analytical-San Carlos Project Blaine/Shell Oil Sampled 5/6/99 <br /> 1551 Industrial Road Project Number L905084/1267 Country Club Received 5110199 <br /> San Carlos,CA 94070 Project Manager Tim Costello Reported 5/28/99 <br /> Industrial Solvents by EPA Method 8015(modified)/Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9050364 Date Prepared 5/12/99 Extraction Method EPA 5030B McOH <br /> Blank 9050364-B L K 1 <br /> Methanol _ 5/12/99 ND mg/l 100 <br /> Surrogate I-pentanol -- - --- -Soo 4 84 " ----- 550-157 968 — - <br /> Surrogate 1 pentanol(dbwax) 500 3 99 570-170 798 <br /> LCS 9050364-BS 1 <br /> Methanol 5/_12199800 8 60 mg/1 700-130 108 <br /> Surrogate 1 pentanol 500 444 550-157 888 <br /> Surrogate I pentanol(dbwax) 5 00 334 570-170 668 <br /> Matrix Spike 9050364-MSI M905018-06 <br /> Methanol 5112/998 00 ND 850 mg/1 500-150 106 <br /> Surrogate 1 pentanol 5 00 433 550-157 866 <br /> Surrogate l-pentanol(dbwax) 500 3 43 570-170 686 <br /> G,ix Spike Dup 9050364-MSDI M905018-06 <br /> Methanol _ _ 5/12199 800 ND 850 mg/1 500-150 106 500 _ 0_ <br /> Surrogate 1-pentanol 500 410 550-157 840 <br /> Surrogate I-pentanol(dbwax) 5 00 3 61 570-170 722 <br /> oia Analytical-Morgan Hill *Refer to end of report for text of notes and definitions <br /> Page 3 of 4 <br />