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RECtIVED 0 <br />'■ AUG 16 2018 Lawr <br />6.2018Lawr nce Livermore National Laboratory <br />y <br />ENVIRONMENTAL HEALTH August 16, 2018 <br />DEPARTMENT <br />Ms. Zuna Barker <br />Environmental Health Specialist <br />San Joaquin County Environmental Health Department <br />1868 East Hazelton Ave <br />Stockton, CA 95205-6232 <br />Subject: Annual Leak Detection Monitoring System Certification Reports and Annual Spill <br />Bucket Leak Test Reports for Underground Storage Tanks at Lawrence Livermore <br />National Laboratory, S300 <br />Dear Ms. Barker: <br />Enclosed are the annual leak detection monitoring system certification reports and the annual <br />spill bucket leak test reports for the three permitted Underground Storage Tanks (USTs) at <br />Lawrence Livermore National Laboratory, S300. Routine maintenance and service checks and <br />tests of the monitoring equipment for permitted USTs are performed annually in accordance with <br />23 CCR 2630 (d), 23 CCR 2637 (b), and 23 CCR 2712 (b). The spill bucket leak tests are <br />performed annually in accordance with H&S Code, Section 25284.2. <br />For the underground petroleum tank systems (882-D 1 U 1, 879-D 1 U 1 and 879-G3U 1), spill <br />bucket leak testing and annual leak detection monitoring system certifications were performed on <br />July 30, 2018 by Mr. Brian Thornton of Thornton Environmental Construction, Inc. Leak <br />detection systems were found to be in proper operating condition. Spill buckets were found to be <br />leak tight. <br />If you have any questions regarding the test results, or need additional information, please <br />contact Eric Mertesdorf of the Environmental Support and Programmatic Outreach Group at <br />(925) 422-4494. <br />Sincerely, <br />Sav Mancieri, Group Leader <br />Environmental Support and Programmatic Outreach <br />Environmental Functional Area <br />ESH-EFA-TKS- 18-15666 -- SM/EM:mw 7sooe 230 <br />An Equal Opportunity Employer • Lawrence Livermore National Security, LLC • Operated for the US Department of Energy <br />PO Box 808 Livermore, California 94551-0808 • Telephone (925) 422-1100 • http //www lint gov <br />