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• 0 <br />Lawrence Livermore National Laboratory <br />R IEC E Q E 10 Environmental Protection Department <br />JAN 3 12005 Operations and Regulatory Affairs Division <br />ENVIRONMENT HEALTH January 28, 2005 <br />PERMIT/SERVICES <br />Mr. Steven C. Shih <br />San Joaquin County Environmental Health Department <br />304 E. Weber Avenue, Third Floor <br />Stockton, CA 95202-2708 <br />Subject: Testing Report from Follow-up Secondary Containment Testing of UST <br />882-D1U1 <br />Dear Mr. Shih: <br />This letter transmits the results of the follow up secondary containment leak tightness <br />testing performed on the 882-D1U1 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 of a 6 -month follow up secondary containment <br />system test subsequent to the repairs and initial testing. Thus, on December 28, 2004, <br />Brian Thornton, a licensed contractor from Thornton Environmental 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 />the annular space. The spill bucket was not tested; it had been tested on two previous <br />occasions. <br />If you have any questions, please contact me at (925) 423-7665. <br />- 1.112, <br />6� <br />Shari Brgdon, Environm tal Analyst Associate <br />Water Guidance and Monitoring Group <br />Enclosures: <br />Secondary Containment Testing Report Form -Building 882 <br />WGMG05:010:SB:cc <br />