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3 <br />It <br />recent investigations at the facility to assess the potential for environmental impacts resulting <br />from these operations and disposal practices. The Navy investigations were performed under the <br />Department of Defense Installation and Restoration Program and, previously, as part of the Navy <br />Assessment and Control for Installation Pollutants Program.] {? <br />Under the Navy's abandoned tank program, abandoned tank 817 B-2 at NCS Stockton is <br />proposed for closure. As part of the closure, the tank will be excavated and removed from the <br />site. After tank removal, a preliminary contamination assessment will be performed. The <br />contamination assessment will include field screening and soil and ground -water sampling t� <br />determine if the tank and associated piping have released contamination into the environment. <br />The UST is located on the west side of, and immediately adjacent to, Building 817-B/01 <br />(base fueling station) as shown in Figure 2. The tank capacity is approximately 2,500 gallons but <br />is currently empty. Former contents of the tank consisted of leaded gasoline. No drawings are <br />available from the Navy to show the exact location of the tank and associated piping. During the <br />site visit on October 9, 1991, the PRC team observed that the tank is immediately south of tank <br />numbers 817 B-1 and 817 B-3. Product lines for all three tanks were identified beneath a grate <br />located adjacent to the service ramp. The orientation of the product line observed for tank <br />number 817 B-2 suggests the line runs as depicted in Figure 2. <br />1.2 PURPOSE <br />The purpose of this CTO is to develop and implement the tank closure plan and to <br />conduct a preliminary contamination assessment at the abandoned tank site. This Tank Closure <br />Plan, which includes a FSP, a QAPjP, and a HSP, is being developed for submittal to, and <br />approval by, San Joaquin County Local Health District. This Tank Closure Plan describes tank <br />closure activities, specific tasks, the sequence of events, and performance standards. Tank <br />closure activities will be conducted in compliance with local, state, and federal UST regulations. <br />1.3 PROJECT ORGANIZATION <br />The PRC project manager, Mr. Jeff Johnson, will report to PRC's Navy CLEAN program <br />manager, Mr. Daniel Chow, and WESTDIV Engineer -in -Charge (EIC), Ms. Lisa Grippo. Direct <br />communication between the Navy EIC and the PRC project manager will help ensure that PRC <br />produces quality work to meet the needs of the Navy. The site manager, Mr. Steve MacNeill, <br />will be responsible for quality control (QC) of field activities and will be in direct contact with <br />the project manager. Reidel Environmental Inc. (Reidel) will be subcontracted to perform the <br />3 <br />