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r <br /> Lawrence Livermore National Laboratory <br /> LL! <br /> January 31,1990 F <br /> Mr.Doug Wilson <br /> F E B 2 <br /> San Joaquin County Public Health Services ENVIRON'" TA .' <br /> Environmental Health Division RErc,go �';iEE �v� <br /> Post Office Box 2009 <br /> Stockton,CA 95201 <br /> Site 300 Inventory Reconciliation Report, 4th Quarter 1989 <br /> Dear Mr. Wilson, <br /> In-use underground storage tanks constructed before January 1,1984,are subject to the leak <br /> monitoring alternatives defined by California Code of Regulations Title 23,Chapter 3, <br /> Subchapter 16, Article 4,Section 2641. Facilities with Underground Storage Tanks(USTs) <br /> monitored according to alternatives that include fuel quantity measurements must report the <br /> results of these measurements quarterly. This letter is the quarterly inventory reconciliation <br /> report filed for the Lawrence Livermore National Laboratory (LLNL) Site 300 facility for the <br /> fourth quarter of 1989. It covers the period from October through December 1989. <br /> Underground storage tanks subject to inventory reporting at the Site 300 facility are used as fuel <br /> supplies for emergency generators and motor vehicles. <br /> Emergency generator fuel supplies are registered with the State Water Resources Control Board <br /> as systems 80541D,827-12D,834-11D and 836-41D. LLNL now identifies these tanks as 805- <br /> D1U1,827-D2U1,834-D1U1,and 836-D1U1,respectively. These systems are monitored <br /> according to Alternative 7: weekly tank gauging and annual tank testing. <br /> There are three motor vehicle fuel supply tanks that are currently identified by LLNL as 879- <br /> G1U1,879-G2U1,879-D1U1. Tank 879-GlU1 was previously registered as 879-11G and 879- <br /> G2U1 was registered as 879-12G. These systems are monitored by the requirements of <br /> Alternative 5: daily inventory reconciliation,annual tank testing,and continuous operation of <br /> pipeline leak detectors. <br /> All quantity variations were within allowable limits, or were attributable to complications <br /> associated with the inventory reconciliation process. There was not a loss of tank contents,as <br /> confirmed by subsequent measurements being within tolerances. Inventory reconciliation of the <br /> tank gauging for tanks 805-D1U1,827-D2U1,834-D1U1 836-D1U1,and 879-G2U1 showed <br /> apparent volume variations in excess of allowable limits as shown on Table 1. The variations <br /> for tank 805-DlU1 on 11-16-89 and tank 836-DlU1 on 10-12-89 were due to miscalculations in <br /> gauging. The variations for tank 879-G2U1 on 10-31-89 was noted after fuel was added and is <br /> attributed to any combination of several reasons as follows: <br /> 1. Contraction of fuel with cooling. <br /> 2. Sloshing of fuel from filling tanks. <br /> 3. The person sticking(gauging)was not the usual person. <br /> 4. Possible incorrect measurement of fuel delivered. <br /> The remaining variations were due to fuel used during power outages and test runs. <br /> M Equal Opportur*y Employer•Universityof California•P.O.Box 808 Livermare,Califomia 94550•Telephone(415)422-1100•Twx 910-386-8339 UCLLL LVMR <br />