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• DDJC-Sharpe Work Plan-Demolitio*Building 137,Closure of Well 2 • 1.0 INTRODUCTION 2.0 TASK SUMMARY 1.1 The purpose of this task-specific work plan 2.1 This well-closure plan was submitted o the is to describe activities relating to the closure Regional Water Quality Control Board (abandonment)of Well 2 and the demolition of (RWQCB) and the San Joaquin County Building 137 at Defense Distribution Depot San Environmental Health Department(SJCEHD) in Joaquin(DDJC),Sharpe Site located near the September 1999 for approval.A downhole video north balloon(see attachment 1). As proposed, survey of Well 2 was performed on 15 October URS Corporation(URS) will provide all 1999, and copies of the video were submit ed to necessary equipment, manpower,and materials the RWQCB and SJCEHD on 20 October 999. to perform the work as scoped, including The downhole video showed: the well total addressing all health and safety concerns related depth is 290 feet below ground surface(bgs) to the performance of field work. All work will (assumed sediment from 290 feet to 333 feet be performed in accordance with the DDJC- bgs); well screen intervals are 122-126 fee bgs, Sharpe/Tracy Comprehensive Field Work Plan 176-182 feet bgs, and 192-206 feet bgs; and and Waste Management Plan, and with all casing diameter and depth is 18-inch casin applicable Federal,State, and local regulations from ground surface to 30 feet bgs and 14 inch and requirements. This work effort is being casing from 30 to 290 feet bgs. Review conducted under contract with the U.S. Army comments on the final work plan and downhole Corps of Engineers,Huntsville Center video were received from RWQCB and (CEHNC),Task Order(TO) 38. SJCEHD, and a response memorandum was submitted on 10 October 2001 (review 1.2 Work proposed in this work plan will comments were also addressed in this revi ed include the demolition of Building 137, which final document).Final approval of proposed houses the Well 2 surface completion and work by RWQCB and SJCEHD is pending. • appurtenances, and the pressure grouting and closure of Well 2(to be completed under 2.2 After acceptance of this revised well subcontract to a drilling contractor yet to be closure plan by the RWQCB/SJCEHD, U S determined). Demolition will include the will re-mobilize to the site for completion of the removal of asbestos shingles attached to the scope of work. Demolition will not occur i ntil building sides and disposal at an approved the following has been completed; facility. Work on the demolition of Building 137 will begin in conjunction with the closure of • An Asbestos Notification has been Well 2, while completion of grouting and submitted to and approved by the San closure of Well 2 will be scheduled after the Joaquin Unified Air Pollution Control building has been removed. District; 1.3 All work will be conducted in coordination • A Demolition Permit Release has been with Mr.John Guzman of DDJC-FA. issued by the San Joaquin Unified Air Pollution Control District;and 1.4 The purpose of the proposed work is to close Well 2 for future use, as it no longer serves * Payment of a nonrefundable fee upon I Cling as a domestic water supply well. Building 137 the asbestos notification subject to the will be removed, including all asbestos shingles provisions of Rule 4002(National attached to the building. This plan provides a Emissions Standards for Hazardous A' general description of the scope of the proposed Pollutants). work and can be incorporated as such. 2.3 Confirmation of underground utilities and • locations of service lines will be made by I JSA Services and Subtronics Co.This informati on WELL2-WP.DOC 1 9 November 2001