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Lawrence Liverm• National Laboratory <br /> August 16, 2018 <br /> RECEIVED <br /> Ms. Zuna Barker AUG 2 2 20)8 <br /> Environmental Health Specialist <br /> San Joaquin County Environmental Health Department pERMITSERVI�ES <br /> 1868 East Hazelton Ave ES <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—SWEM:mw '16006,1230 <br /> An Equal Opportunity Employer• Lawrence Livermore National Security. LLC •Operated for the US Department of Energy <br /> P.O Box 808 Livermore. California 94551-0808•Telephone(925)422-1100•http//www.linl.gov <br />