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Home My WebLink AboutNC0000396_SARP_Rev 0_ Appendix F_20161219Amec Foster Wheeler Environment & Infrastructure, Inc. December 2016 Duke Energy Coal Combustion Residuals Management Program Asheville Steam Electric Generating Plant Site Analysis and Removal Plan Revision 0 Appendix F – Construction Quality Assurance Plan (CQA Plan) CONSTRUCTION QUALITY ASSURANCE PLAN ASHEVILLE STEAM ELECTRIC GENERATING PLANT REVISION 0 Prepared for Duke Energy 400 South Tryon Street Charlotte, North Carolina 28202 December 2016 Prepared by Amec Foster Wheeler Environment & Infrastructure, Inc. Project 7810160620  Amec Foster Wheeler Environment & Infrastructure, Inc. December 2016 Construction Quality Assurance Plan Asheville Steam Electric Generating Plant Site Analysis and Removal Plan Revision 0 TABLE OF CONTENTS 1. INTRODUCTION ................................................................................................................. 1 2. BACKGROUND ................................................................................................................... 1 3. PROJECT TEAM AND RESPONSIBILITIES ..................................................................... 2 3.1. Owner ............................................................................................................................................... 2 3.2. Design Engineer of Record (Engineer) ....................................................................................... 2 3.3. Construction Quality Assurance Engineer .................................................................................. 2 3.4. Engineering Technicians ............................................................................................................... 3 3.5. Prime Contractor ............................................................................................................................ 3 3.6. Regulatory Agency ......................................................................................................................... 3 4. DOCUMENTATION ............................................................................................................. 3 4.1. Record Documentation .................................................................................................................. 3 4.2. Design, Specification, and Drawing Changes ............................................................................ 4 4.3. Non-Conformances ........................................................................................................................ 4 4.4. Record Drawings ............................................................................................................................ 4 4.5. Certification Report ........................................................................................................................ 5 5. QUALITY ASSURANCE PROGRAM ................................................................................. 5 5.1. Fill Density Testing ......................................................................................................................... 5 5.2. Verification of Ash Removal .......................................................................................................... 5 5.3. Surveying ......................................................................................................................................... 6 Figures Figure 1 – Site Location Map Amec Foster Wheeler Environment & Infrastructure, Inc. December 2016 Construction Quality Assurance Plan Asheville Steam Electric Generating Plant Site Analysis and Removal Plan Revision 0 1 1. INTRODUCTION This document presents the Construction Quality Assurance (CQA) Plan for the Asheville Steam Electric Generating Plant (Plant) Dam Decommissioning project in Buncombe County, North Carolina. A site location map of the project area is shown on Figure 1. The purpose of the CQA Plan is to identify the quality assurance procedures, standards, and methods that will be employed during the project to provide assurance that the requirements of the drawings, specifications, regulatory permits, and owner specified health, safety and environmental requirements are met. The CQA Plan is specific to the referenced project and is prepared in compliance with the North Carolina Coal Ash Management Act of 2014. The primary objectives of the scope of work for the Dam Decommissioning project at the Plant include the excavation and removal of CCR materials currently stored in the area known as the 1964 Ash Basin, and the decommissioning of the existing ash basin dams for the 1964 Ash Basin and 1982 Ash Basin. The excavation and removal of CCR materials from the 1982 Ash Basin was completed on September 30, 2016. The scope of work includes all ancillary activities such as erection and maintenance of erosion and sediment control, dewatering, grading to design grades, permanent stabilization, and all other activities required to achieve the primary objectives. The scope of work also includes obtaining and complying with regulatory permits required for performing the work. The project will be performed with regard to safety and environmental standards in compliance with local, state, and federal regulations as included in the site specific environmental, health and safety program. 2. BACKGROUND The Plant is located in Buncombe County in Western North Carolina, approximately 8 miles south of the City of Asheville. Fly ash and bottom ash have historically been deposited within the facility’s 1964 and 1982 Ash Basins by hydraulic sluicing. The site has two regulated impoundment structures, the 1964 Ash Basin Dam (State ID BUNCO-097) and the 1982 Ash Basin Dam (State ID BUNCO-089). Excavation of the 1982 Ash Basin was completed on September 30, 2016, and the basin was turned over for dam decommissioning and the construction of a natural gas combined cycle plant after an independent qualified professional engineer concluded that primary source ash had been removed from the basin. The closure of the ash management facilities at the station is a part of the overall station decommissioning plan. The CCR materials in the 1964 Ash Basin will be excavated and transported from the site for beneficial use or placement in an off-site permitted landfill. Per the current plan, after establishing the final design grades, the footprints of the 1982 Ash Basin will become the site for a planned combined cycle plant, and the 1964 Ash Basin footprint will be graded to drain. The potential future use of the 1964 Ash Basin is undetermined at this time. Amec Foster Wheeler Environment & Infrastructure, Inc. December 2016 Construction Quality Assurance Plan Asheville Steam Electric Generating Plant Site Analysis and Removal Plan Revision 0 2 3. PROJECT TEAM AND RESPONSIBILITIES The following identifies the roles and responsibilities for the primary parties associated with the project, including the anticipated duties and expectations each party will fulfill in execution of the work associated with implementation of the project. 3.1. Owner The Owner of the site and project is Duke Energy Progress, LLC (Duke). The Owner is ultimately responsible for oversight and authorization of the work and assuring that the work is performed in general accordance with the specifications, drawings, permits, this CQA Plan, and other contractual documents. The Owner has the right to delegate its oversight authority to third parties contracted with the Owner but will maintain ultimate responsibility for the successful implementation of the project. The Owner will maintain the authority to make final decisions regarding all aspects of the project in compliance with local, state, and federal regulations. For this project, the Owner will have sole authority to suspend or stop work if, in their opinion, the work is being performed in an unsafe manner, the work is not meeting quality standards, or changes to the scope of work must be enacted to comply with the spirit of the objectives of the project. 3.2. Design Engineer of Record (Engineer) The Design Engineer of Record (Engineer) is the engineer who signs and seals the Issued for Construction Drawings and Specifications. The Engineer is delegated limited and selected authority at the discretion of the Owner. The Engineer acts in a consultant role to the Owner on aspects of the project for which the Owner seeks direction in the decision making process. The Engineer has no authority to stop or suspend work at the site, only the authority to recommend remedial actions for the Owner’s consideration. 3.3. Construction Quality Assurance Engineer The Construction Quality Assurance Engineer (CQA Engineer) will be experienced in quality assurance testing and monitoring. The CQA Engineer will report to the Owner and can be employed by the same entity as the Design Engineer of Record. The CQA Engineer may be a Duke employee. The CQA Engineer serves as the on-site representative of the Owner and is responsible for the field implementation of the approved quality assurance program as follows:  Monitor the quality assurance activities of the field testing and document conformance with test procedures and the Technical Specifications  Inform the Engineer of quality assurance activities and non-conformance to the approved CQA program, if any  Observe that sample handling procedures are in accordance with the appropriate guidelines for the testing to be conducted  Organize, assign, and direct engineering technicians Amec Foster Wheeler Environment & Infrastructure, Inc. December 2016 Construction Quality Assurance Plan Asheville Steam Electric Generating Plant Site Analysis and Removal Plan Revision 0 3  Maintain an awareness of the overall field testing operations to identify conditions that may jeopardize the quality of testing. 3.4. Engineering Technicians The engineering technicians (technicians) are responsible for field observations and testing at the direction of the CQA Engineer. Technicians will be assigned to the project as deemed necessary by the CQA Engineer. The CQA Engineer may perform and conduct field observations and testing himself. Technicians will be under the direct supervision of the CQA Engineer. 3.5. Prime Contractor The Prime Contractor will be responsible for performing and managing construction activities required for completing the project. The Prime Contractor is responsible for performing the work in compliance with the requirements and to the quality standards of the specifications, drawings, permits, and this CQA Plan. The Prime Contractor is responsible for overseeing and managing their personnel, including the personnel of their Subcontractors such that the work is performed safely and effectively and in compliance with local, state, and federal safety and environmental regulations to include the Owner’s site specific environmental, health, and safety rules. 3.6. Regulatory Agency The Regulatory Agency having direct regulatory authority for the project is the North Carolina Department of Environmental Quality (NCDEQ). With respect to dam decommissioning, the lead agency is the NCDEQ, Division of Energy, Mineral, and Land Resources, Land Quality Section, Dams Program. The Regulatory Agency has the authority to inspect the project at any time during the course of the work, and has the authority to direct the Owner to suspend or stop the work with appropriate cause. Upon direction to suspend or stop the work, the Regulatory Agency should provide remedial measures to the Owner, that once implemented, should allow for work to continue. 4. DOCUMENTATION This section provides a description of project documentation and record keeping that will be maintained during the course of the work as the project record. 4.1. Record Documentation Reports will be completed by designated Owner personnel to serve as a record of the project. The reports are intended to summarize work activities, serve as a record of important discussions and/or decisions, action items, or other information that the Owner deems important or critical to the project record. The Owner, at their discretion, may require other entities, such as the CQA Engineer, to maintain records as well. Amec Foster Wheeler Environment & Infrastructure, Inc. December 2016 Construction Quality Assurance Plan Asheville Steam Electric Generating Plant Site Analysis and Removal Plan Revision 0 4 The CQA Engineer and technicians will be responsible for documenting construction, monitoring, and testing activities by taking photographs. Photographs should be organized and documented in photo-logs and/or by including them in reports, monitoring logs, and test data sheets. Photo-logs should include a unique identifying number corresponding to the photograph file name, the date and location where the photograph was taken, and a description of the photograph subject matter. 4.2. Design, Specification, and Drawing Changes Design, specification, and drawing changes may be required during construction. Proposed changes may be initiated by the Design Engineer of Record, Contractor, CQA Engineer, or Owner and submitted to the Design Engineer of Record for consideration. Design, specification, and drawing changes may be made only with the approval of the Design Engineer of Record with consent from the Owner. Changes that affect the design intent will require approval of that agency. 4.3. Non-Conformances Non-conformance reports are intended to serve as a record of nonconforming items during the course of the work and as a record of the disposition of the non-conformance. Generally, the Owner will initiate the non-conformance procedure based on the recommendation or findings of a third party such as a CQA Engineer. The non-conformance will be evaluated and resolved with the disposition will be recorded in the non-conformance report. Sample dispositions may include rework of the nonconforming item, replacement of the nonconforming item, or accepting the nonconforming item as installed based on engineering judgment. A record of all non- conformance reports will be maintained at the site during the course of the work at all times for review by requesting representatives of the Regulatory Agency. 4.4. Record Drawings The Contractor shall retain a third-party surveyor registered in North Carolina. The Contractor shall be responsible for submitting to the Engineer the following:  Existing conditions survey (pre-construction);  Existing stormwater piping elevations and locations (including piping to be removed);  Interim conditions survey (prior to removal of sediment basins);  Installed stormwater piping elevations and locations; and  Final conditions survey. The existing conditions, conditions prior to removal of sediment basins, and final conditions surveys shall be performed on a 100-foot grid with berms, toes, crests, and breaks-in-slope also surveyed. Topographic surveys shall be performed on the same grid such that survey point locations are consistent with the survey points of the underlying layer. Surveys shall also show contours of the completed surface at two-foot contour intervals. Amec Foster Wheeler Environment & Infrastructure, Inc. December 2016 Construction Quality Assurance Plan Asheville Steam Electric Generating Plant Site Analysis and Removal Plan Revision 0 5 As-built locations and details for existing and installed stormwater piping shall also be submitted to the Engineer by the Contractor. Drawings shall include pipe locations at a spacing that is adequate to identify the position of the pipe. Survey timing should be coordinated so as not to impact the construction schedule of the geosynthetics and overlying materials. 4.5. Certification Report The Engineer will prepare a certification report upon completion of dam decommissioning activities. The certification report will include as-built and record documents that are intended to serve as documentation of the project. For this project, the primary purpose of the record drawings is to capture final grades at the site for use in future projects. A secondary purpose is to fulfill regulatory requirements for developing as-built drawings for decommissioned ash basins. The as-built and record documents will generally include:  Record drawings detailing final grades;  Record of quality assurance/control testing including compacted fill, stormwater piping information, instrumentation monitoring, and verification of CCR removal;  Record of non-conformance reports; and  Other relevant information or data at the discretion of the Owner. 5. QUALITY ASSURANCE PROGRAM The intent of the Quality Assurance Program is to provide observations, test data, and other recorded information at a sufficient frequency to assure that the work is completed in general accordance with the requirements of the specifications, drawings, regulatory permits, and other controlling documents. 5.1. Fill Density Testing Final grades at the site will be established by placing and compacting soil materials excavated from onsite sources. The requirements for fill placement are provided in the Technical Specifications. The general requirements for fill density testing include establishing moisture- density relationships for fill materials, visually observing placement of fill materials during construction, performing fill density tests to assess the level of compaction achieved, and recording the results of testing for project records. 5.2. Verification of Ash Removal Verification and documentation that CCRs have been removed will be required during ash basin closure implementation. In order to meet the basin closure performance standard, Duke’s CCR Removal Verification Procedure will be used to verify that primary source ash has been removed from the basin. Subsequent to removal of the ash pursuant to the CCR Removal Verification Procedure, Duke will implement its “Excavation Soil Sampling Plan, Asheville Steam Electric Plant, 1964 Ash Basin, For Ash Basin Excavation, North Carolina Ash Basin Closure” Amec Foster Wheeler Environment & Infrastructure, Inc. December 2016 Construction Quality Assurance Plan Asheville Steam Electric Generating Plant Site Analysis and Removal Plan Revision 0 6 which was developed for the purpose of closing the 1964 Ash Basin in a manner that meets the closure performance standards set out in Part II, Section 3.(c) of the Coal Ash Act and 40 C.F.R. § 257.102(c). The Excavation Soil Sampling Plan is attached to the Asheville Steam Electric Generating Plant Coal Ash Excavation Plan (2016 Update). 5.3. Surveying The Owner may, at their discretion, contract with a CQA Engineer to perform surveying services for the project to validate or verify the surveys performed by the Prime Contractor. A specific scope of work and frequency or quantity of measurements for the CQA Engineer performing the surveying services for the Owner will be developed if and when such services are contracted. The scope of work for surveying to be performed by the Prime Contractor is contained in this CQA Plan and the technical specifications. Amec Foster Wheeler Environment & Infrastructure, Inc. December 2016 Construction Quality Assurance Plan Asheville Steam Electric Generating Plant Site Analysis and Removal Plan Revision 0 FIGURES Lion NORTH CAROUNA i ! Project Location ye M y O 1 / 7p , { 4,000 Qi 00 SerY^II<eL3YNCeAM Lffce Feet KmlasW ru, Ordrku im- urr GIG Uau mrnmu C-ogyM amec foster wheeler PREPARES DATE CHECKED C-A-E BY Jh1�S 11v&15 BY SS 17"r1`. AI eyt, CIO 1"iYl � NX 25 52 4� i�-2Az[i Basin- �v r r'+ s: Earl. HERE, ^,eLormE, In�eYmpa, Iicrernerlt P Corp.. Esrl Japan,METI, Esal CIPla i Hong {oi g1, s!Mss FBC4, USGS, FAO, NP , N•RCAN, Geoff, IGN Mapmynncla, open:StFeelMap eontbutoea„�wtl th ht 211.3 N=Dnal GEoQ alll". ✓xicv. -wteC 3 SITE LOCATION MAP DUKE ENERGY ASHEVILLE PLANT SKYLAND, NORTH CAROLINA J°:-'-B `4 ,M31=R i 8-I'3-' 5-11250 FIICU E