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Interdepartmental lettoad • <br /> Mail Station L-654 PLANT ENGINEERING <br /> Design and Construction Division <br /> Ext: 2-8829 May 13,1994 <br /> TO: Richard Henry <br /> FROM: Gene Shaw <br /> Structural Enginee& <br /> SUBJECT: Tank Upgrade Project <br /> Tank 865-D1 U1 Close-In-Place Justification <br /> Background <br /> Diesel tank 865-DlU1 serves a boiler for the Lawrence Livermore National Laboratory <br /> (LLNL) Advanced Test Accelerator (ATA) Building 865, Site 300. The boiler supplies <br /> process and building heat to Building 865 are currently not in-use. <br /> Area of Concern <br /> The boiler is anchored on a concrete pad right next to the tank concrete pad on the north <br /> side and there are two 6 inch cooling water pipes and several electrical facilities across the <br /> top of the concrete pad on the south side. In order to remove the tank, the concrete pad shall <br /> be demolished which will affect the cooling water pipes, electrical facilities, and the <br /> excavation of the underground tank will jeopardize the boiler foundation and electrical <br /> utilities. In order to maintain the existing boiler foundation, the sheet piling, or lagging, or <br /> underpinning shall be installed, either one requires heavy equipment for the installation. <br /> The surroundings of this underground tank location is very congested and it is impossible to <br /> situate a heavy equipment near the job-site. Therefore, it is proposed that this underground <br /> diesel tank 865-D1U1 should be closed-in-place. <br /> cc: Matt Mlekush L-633 <br /> Bruce Campbell L-633 <br /> Charlie Brown L-633 <br /> Ed Sioson L-654 <br /> Bob Simonds L-871 <br /> Glen Westenkow L-441 <br /> Design&Construction/Tank 865-D1 U1 Close-In-Place Justification/w001/gs/pw <br /> University of California <br /> OR Lawrence Livermore <br /> National Laboratory <br />