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SCOPE OF WORK <br /> Underground storage tank (UST) 814-D1 U1 adjacent to Building 814 <br /> will be closed by excavation and removal. The site for excavation <br /> will be cordoned off for the protection of other LLNL personnel. Fuel <br /> product lines were flushed back into the tank, and UST 814-D1 U1 <br /> was emptied and decontaminated. Soil above the tank will be <br /> removed and the tank will be excavated. Solid carbon dioxide (dry <br /> ice) will be introduced into the tank to displace oxygen within the <br /> tank. When the oxygen level within the tank is at or below 10%, the <br /> tank will be removed and along with the piping (approximately 40 <br /> linear feet, in two 20-foot lengths) transported as hazardous waste <br /> to a recycler or a disposal facility. If a concrete anchor pad is <br /> present beneath the tank, it will be removed as part of this tank <br /> closure. Soil samples will be collected by LLNL's Environmental <br /> Protection Department (EPD) for laboratory analysis. Soil will be <br /> stockpiled on and covered by polyethylene sheets. The excavation, <br /> trenches and stockpiled soil will be secured with barricades pending <br /> the analysis of the soil samples and subsequent review of the <br /> laboratory results by the LLNL EPD. <br /> -SITE ORGANIZATION <br /> Site Safety Officer (SSO): <br /> Stan Pereira <br /> (LLNL Labor Shop Supervisor) <br /> • Responsible for implementing the project and obtaining any <br /> necessary personnel or supplies to complete the project safely <br /> and in a timely manner. <br /> • Monitors adherence to the SHASP and halts site operations if <br /> the SHASP is being violated or if a hazardous condition arises <br /> at the site. <br /> Contractors (Company) <br /> (Supervisor) <br /> (Workers)_ <br /> (Company)_ <br /> (Supervisor) <br /> (Workers) <br /> D-2 <br />