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•01/28/05 16:12 FAX 925 422 27A8 EPD / WGMG 002 <br />Lawrence Livermore National Laboratory <br />January,28, 2005 <br />Mr. Steven C. Shih <br />San !-Qaguin Couni�z Environmental Health De:9artment <br />304 E. -• Avenue, Third •• <br />Stockton, CA 95202-2708 <br />Subject: Testing Report from Follow-up Secondary Containment Testing of UST <br />882 -DI -C -i <br />Dear Mr. Shih: <br />This letter transmits the results of the follow up secondary containment leak tightness <br />testing performed on the 882-DlU1 underground diesel tank system at Lawrence <br />Livermore National Laboratory's (LLNL) Experimental Test Site (Site 300). <br />During the annual monitoring system certification conducted in October 2004, we <br />discovered that there is no record • a 6 -month follow up secondary • <br />system test subsequent to the repairs and initial testing. Thus, on December 28, 2004, <br />Brian Thornton, a licensed contractor from Thornton • Construction, <br />performed secondary containment testing. The system was found to be leak tight. <br />Testing included the piping sump, FOS and FOR secondary containment piping, and <br />I witull• <br />If you have any questions, please contact me at (925) 423-7665. <br />Shari Brikdon, EnvironmAtal Anal st Associate <br />W <br />Enclosures: <br />Secondary Containment Testing Report Form -Building 882 <br />