Tennessee Valley Authority · NYSE:TVC
Tennessee Valley Authority — Corporate Update (October 2019)
58 slides from Tennessee Valley Authority's corporate update, October 2019
Slide 1: Allen Fossil Plant Community Information Session
Tennessee Valley Authority welcomes you to the ALLEN FOSSIL PLANT COMMUNITY INFORMATION SESSION Environmental Impact Statement + Environmental Investigation + Remedial Investigation + Interim Response Actions
Slide 2: Today's Topics
ALLEN FOSSIL PLANT TODAY'S TOPICS Closure + Current Groundwater Current Environmental Investigation + Evaluation Development Conditions Activities Environmental Environmental Remedial Interim Response Impact Statement Investigation Investigation Actions • TVA is seeking input on the scope • Details
Slide 3: Allen Fossil Plant Overview
Metal Cleaning ALLENWest FOSSIL Ash Pond PLANT Pond OVERVIEW uction wn Area ± Metal Cleaning West Ash Pond Pond \\us1229-f01\work_group\1726\active\172675014\07_historical\gis\mxd\10\ALF East Ash Pond Complex NEPA Map_10.4.mxd East Ash Pond Construction Complex Lay Down Area M i s s ouri Kentu Legen
Slide 4: Historic Timeline
ALLEN FOSSIL PLANT HISTORIC TIMELINE 1956 2018 Allen Fossil Plant 1991 Ceased operations and constructed by East Ash Disposal replaced by TVA Allen Memphis Light Area temporarily Combined Cycle plant Gas & Water 1984 deactivated to TVA purchases facilitate construction Compared with the the Allen Fo
Slide 5: TVA's Commitment and Strategy
ALLEN FOSSIL PLANT TVA'S COMMITMENT AND STRATEGY TVA's commitment • TVA is committed to protecting human health and the environment and doing the right thing for the people of Memphis • TVA is committed to the remediation of arsenic impacts at the Allen Fossil Plant • TVA is committed to economic de
Slide 6: Coal Combustion Residuals Compliance Order
ALLEN FOSSIL PLANT COAL COMBUSTION RESIDUALS COMPLIANCE ORDER What is the TDEC Order What is the EIP? and why was it put in place? What it is and why we do it TDEC has requested certain information about On August 6, 2015, the Tennessee Department Allen’s CCR management. of Environment and Conservat
Slide 7: Environmental Impact Statement Ash Impoundment Closure
ALLEN FOSSIL PLANT ENVIRONMENTAL IMPACT STATEMENT ASH IMPOUNDMENT CLOSURE Why it is being done How it might get done • Support TVA’s commitment to eliminate wet CCR storage at its coal plants by Alternatives Considered in the EIS closing CCR surface impoundments Alternative A • Meet federal and stat
Slide 8: Environmental Impact Statement—Process/Schedule
ALLEN FOSSIL PLANT ENVIRONMENTAL IMPACT STATEMENT—PROCESS/SCHEDULE Notice of Intent Public Scoping Period Prepare Draft EIS Publication of the Notice of Public Provides input on EIS scope Review public scoping comments, identify Intent in the Federal Register Community alternatives, conduct studies
Slide 9: Environmental Impact Statement—Comments
ALLEN FOSSIL PLANT ENVIRONMENTAL IMPACT STATEMENT— COMMENTS How to Provide Comments on the EIS Written comments can be left here or mailed to the address on the Comment Form. You can also provide comments by: Email: wdwhite0@tva.gov Web: www.tva.gov/nepa Mail: Attn: W. Douglas White NEPA Specialist
Slide 10: Environmental Impact Statement—Potential Landfill Sites
ALLEN FOSSIL PLANT ENVIRONMENTAL IMPACT STATEMENT— POTENTIAL LANDFILL SITES Landfills were screened based on the following criteria: • Located within 600 miles for • Ability to accept CCR • Sufficient capacity Rail • Ability to dedicate a portion of • No geographic restrictions on - or - the landfil
Slide 11: Environmental Impact Statement—Truck vs Rail Transport of CCR
ALLEN FOSSIL PLANT ENVIRONMENTAL IMPACT STATEMENT— TRUCK VS RAIL TRANSPORT OF CCR Criteria Truck Transport Rail Transport Safety Minor impact due to Increased risk Minor impact due to Increased risk of accidents and road damage due of accidents and derailments to increased vehicles on roadways Risk
Slide 12: Environmental Impact Statement—Potential Backfill (Borrow) Sources
ALLEN FOSSIL PLANT ENVIRONMENTAL IMPACT STATEMENT— POTENTIAL BACKFILL (BORROW) SOURCES Potential Backfill Source Locations and Haul Routes TVA will use clean soil to backfill the East Pond after the CCR has been removed. TVA will implement the following measures to minimize impacts associated with t
Slide 13: TDEC Order Environmental Investigation Plan
ALLEN FOSSIL PLANT TDEC ORDER ENVIRONMENTAL INVESTIGATION PLAN This event is to provide information about the Environmental Investigation Plan (EIP) for the decommissioned Allen Fossil Plant. The following acronyms appear frequently on the boards: • Environmental Investigation Plan (EIP) • Tennessee
Slide 14: Environmental Investigation Plan Process/Schedule
ALLEN FOSSIL PLANT ENVIRONMENTAL INVESTIGATION PLAN Process/Schedule TDEC Order All Interested Investigation EIP Parties Conference Meeting April 27, 2016 September 24, 2018 Revision Cycle Address TDEC Comments Summarize + Respond to Comments + Implement EIP Official Public Comment Period Revise EIP
Slide 15: Exploratory Drilling (1 of 3)
ALLEN FOSSIL PLANT EXPLORATORY DRILLING (1 of 3) What it is and why we do it Exploratory drilling helps us better understand what is in and under each CCR unit. Material Slope Stability Quantity 3D It tells us: Model • What is there: material types (CCR, soil) and properties (strength, permeability,
Slide 16: Exploratory Drilling (2 of 3)
ALLEN FOSSIL PLANT EXPLORATORY DRILLING (2 of 3) Where will the drilling be done? Exhibit No. 4 Title Propose East As Client/Project Tennessee Allen Fossi East Ash Disposal Area Project Location ¯ Memphis, Tenne 0 19 Borings 3 Borings with % L % L STN-1 STN-2 ( $ $ Legen ! P Propose Temporary Wells
Slide 17: Exploratory Drilling (3 of 3)
ALLEN FOSSIL PLANT EXPLORATORY DRILLING (3 of 3) Exhibit No. 5 Title Proposed Borings West Ash Disposal Area Client/Project Tennessee Valley Authority Allen Fossil Plant Project Location Memphis, Tennessee Prepa West Ash Disposal Area Technical Rev 0 150 300 450 17 Borings 1:1,800 (At original docum
Slide 18: Slope Stability (1 of 3)
ALLEN FOSSIL PLANT Stat Tennessee Valley Authority Allen Fossil Plant East Ash Disposal Area Memphis, Tennessee SLOPE STABILITY Section E-E' Existing Geometry; (1 of 3) Long-Term, Maximum Storage Pool Loading; Effective Stress Analysis; Drained Strengths Note: The results of the analysis shown here
Slide 19: Slope Stability (2 of 3)
ALLEN FOSSIL PLANT SLOPE STABILITY (2 of 3) What it is and why we do it What TVA has Slope stability is influenced by water levels and already done pressures (among other factors). TVA has multiple types of water level Monitoring water levels also supports the instruments on site, as well as a numbe
Slide 20: Slope Stability (3 of 3)
ALLEN FOSSIL PLANT SLOPE STABILITY Figure No. (3 of 3) 1 - Public Meeting Title Existing Instrumentation West Ash Disposal Area Figure No. 1 - Public Meeting Client/Project Title Tennessee Valley Authority Existing Instrume Existing instrumentation Allen Fossil Plant Project Location West Ash Dispos
Slide 21: Coal Combustion Residuals Material Quantity
ALLEN FOSSIL PLANT COAL COMBUSTION RESIDUALS MATERIAL QUANTITY What it is and ALLEN FOSSIL PLANT DRAFT why we do it N COAL COMBUSTION RESIDUALS Recent surveys of the site tracked the location MATERIAL QUANTITY and quantity of coal combustion residuals (CCR) to aid overall site management. What it is
Slide 22: Hydrogeologic Investigation
ALLEN FOSSIL PLANT HYDROGEOLOGIC INVESTIGATION What it is and why we do it Groundwater monitoring well Hydrogeologic investigations help us better understand how groundwater moves in a particular area, as well as its interaction with the surrounding soils and rocks. These investigations consist of i
Slide 23: Groundwater Investigation
ALLEN FOSSIL PLANT GROUNDWATER INVESTIGATION What it is and What TVA has why we do it already done Groundwater samples are collected • Groundwater monitoring has been performed frequently to test for a number of quality routinely since 1988 measures. By testing groundwater regularly, • Samples are a
Slide 24: Background Soil Investigation
ALLEN FOSSIL PLANT BACKGROUND SOIL INVESTIGATION What it is and What TVA has why we do it already done The constituents found in CCR are also found • Background soil samples were collected in nature. This investigation would detect CCR from 4 locations during the Remedial constituent levels in backg
Slide 25: Seepage Investigation
ALLEN FOSSIL PLANT SEEPAGE INVESTIGATION What it is and What TVA has why we do it already done Exhibit No. Dikes on the property are checked 8 • TVA has conducted annual dike inspections at Title frequently to identify active seeps. ALF since 1970 Historical Seeps (Approximate Locat The soils and wa
Slide 26: Coal Combustion Residuals Material Characteristics (1)
ALLEN FOSSIL PLANT COAL COMBUSTION RESIDUALS MATERIAL CHARACTERISTICS (1 of 2) What it is and What TVA has already done why we do it • 1995 — Slag fines analyzed for leachability and trace metals The different CCR materials on site are tested for levels and types of chemical • 2002 — Slag fines and
Slide 27: Coal Combustion Residuals Material Characteristics (2)
ALLEN FOSSIL PLANT COAL COMBUSTION RESIDUALS MATERIAL CHARACTERISTICS (2 of 2) ¯ Figure No. 4 ( Title Temp $ $ West Client/Proje Tennes Allen F Proposed temporary wells Project Loc Memphis, West Ash Disposal Area Lege $ K TW05 Sluiced TW04 Ash Figure No. Sluiced $ K 4 $ K Ash Title Temporary Wells W
Slide 28: TVA's Advanced Technology for Impoundment Monitoring Center
ALLEN FOSSIL PLANT TVA'S ADVANCED TECHNOLOGY FOR IMPOUNDMENT MONITORING CENTER Automated Instrumentation TVA’s Advanced Technology for Impoundment Monitoring (ATIM) Center $2 million helps to identify and More than 11,000 to develop the respond to any coal real‑time sensors to ATIM center ash issues
Slide 29: Remedial Investigation
ALLEN FOSSIL PLANT REMEDIAL INVESTIGATION What is Remedial Investigation? A Remedial Investigation (RI) is a scientific study intended to: 1 Gather the data necessary to evaluate the nature and extent of environmental impacts at a property 2 Establish cleanup goals 3 Identify preliminary corrective
Slide 30: Remedial Investigation Timeline
ALLEN FOSSIL PLANT REMEDIAL INVESTIGATION TIMELINE Process/Schedule TDEC Requests TDEC Approves TVA Begins Voluntary Remedial Investigation Remedial Investigation Groundwater Investigation Work Plan Work Plan May 2017 July 2017 September 2017 Supplemental Remedial Remedial Remedial Investigation Inv
Slide 31: Remedial Investigation—Delineate CCR Constituents (1)
ALLEN FOSSIL PLANT REMEDIAL INVESTIGATION— DELINEATE CCR CONSTITUENTS (1 of 2) The horizontal extent of arsenic, fluoride, and lead in groundwater is limited to two primary areas: north and south of East Ash Disposal Area. Horizontal delineation (arsenic) north and south areas • Arsenic above the AL
Slide 32: Remedial Investigation—Delineate CCR Constituents (2)
ALLEN FOSSIL PLANT REMEDIAL INVESTIGATION— DELINEATE CCR CONSTITUENTS (2 of 2) Vertical distribution of arsenic, fluoride, and lead in groundwater • The highest concentrations were detected within the upper 40 feet of the Alluvial aquifer • Arsenic, fluoride and lead were not detected above USEPA dr
Slide 33: Plant Deconstruction
ALLEN FOSSIL PLANT PLANT DECONSTRUCTION The Former Allen Fossil Plant will be Deconstructed. The Allen Fossil Plant was constructed in the The EA evaluated the potential environmental 1950s by the Memphis Light, Gas and Water effects of the future disposition of the physical Company (MLGW). TVA purc
Slide 34: Deconstruction of Former Allen Fossil Plant
ALLEN FOSSIL PLANT DECONSTRUCTION OF FORMER ALLEN FOSSIL PLANT A change is underway at TVA as energy efficiency has reduced demand and the company shifts away from coal and toward cleaner sources of generation such as nuclear, renewables, and natural gas. Old facilities are being turned into new opp
Slide 35: D4—Scope and Timeline
ALLEN FOSSIL PLANT D4—SCOPE AND TIMELINE Allen Fossil D4 Scope and Timeline TVA begins Decontamination and Demolition TVA begins Decommissioning 2018 2022 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 ALLEN FOSSIL PLANT UPDATE - 10-08-19 | 3
Slide 36: Allen Fossil Plant Update
ALLEN FOSSIL PLANT PLANT UPDATE Allen Fossil Plant Update October 8, 2019 Allen Fossil Plant Commissioning Date: 1959 Retirement Date: March 2018 Size of facility: Approx. 500 acres Former Output: 741 megawatts Amount of CCR material: Approx. 3.5 million cubic yards CCR Units to be Closed: East Ash
Slide 37: Allen Environmental Stewardship
ALLEN FOSSIL PLANT PLANT UPDATE Allen Environmental Stewardship 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 ALLEN FOSSIL PLANT UPDATE - 10-08-19 | 3 Allen Environmental Stewardship McKellar Lake McKellar Lake created by City of Memphis 1948-1950 1940 194
Slide 38: Allen Environmental Stewardship
ALLEN FOSSIL PLANT PLANT UPDATE Allen Environmental Stewardship West Ash Pond Allen Fossil Plant (ALF) ALF constructed and operated by MLGW 1956-59 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 ALLEN FOSSIL PLANT UPDATE - 10-08-19 | 3 Allen Environmental S
Slide 39: Allen Environmental Stewardship
ALLEN FOSSIL PLANT PLANT UPDATE Allen Environmental Stewardship TVA begins leasing ALF from MLGW 1965 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 ALLEN FOSSIL PLANT UPDATE - 10-08-19 | 3 Allen Environmental Stewardship East Ash Pond Ash is sluiced to new
Slide 40: Allen Environmental Stewardship
ALLEN FOSSIL PLANT PLANT UPDATE Allen Environmental Stewardship West Ash Pond West Ash Pond is deactivated 1978 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 ALLEN FOSSIL PLANT UPDATE - 10-08-19 | 3 Allen Environmental Stewardship TVA Purchases the Allen F
Slide 41: Allen Environmental Stewardship
ALLEN FOSSIL PLANT PLANT UPDATE Allen Environmental Stewardship Begin Evaluation of Closure Options for East and West Ponds 2014 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 ALLEN FOSSIL PLANT UPDATE - 10-08-19 | 3 Allen Environmental Stewardship West Ash
Slide 42: Allen Environmental Stewardship
ALLEN FOSSIL PLANT PLANT UPDATE Allen Environmental Stewardship TVA entered into an agreement with the City of Memphis, Shelby County, Port Authority and MLG&W 2015 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 ALLEN FOSSIL PLANT UPDATE - 10-08-19 | 3 Alle
Slide 43: Allen Environmental Stewardship
ALLEN FOSSIL PLANT PLANT UPDATE Allen Environmental Stewardship CCR Sluicing to the East Ash Pond ceases 2018 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 ALLEN FOSSIL PLANT UPDATE - 10-08-19 | 3 Allen Environmental Stewardship Allen Combined Cycle Plant
Slide 44: Conceptual Future Condition
ALLEN FOSSIL PLANT PLANT UPDATE Allen Environmental Stewardship TVA begins Decontamination and Demolition TVA begins Decommissioning 2018 2022 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 ALLEN FOSSIL PLANT UPDATE - 10-08-19 | 3 Conceptual Future Conditio
Slide 45: For More Information
ALLEN FOSSIL PLANT PLANT UPDATE For More Information Allen Fossil Plant https://www.tva.gov/Energy/Our-Power-System/Coal/Allen-Fossil-Plant Air Quality – Water Quality – Ash Storage https://www.tva.com/Environment/Environmental-Stewardship TDEC Order https://www.tva.com/tdec Groundwater Monitoring w
Slide 46: Remedial Investigation
ALLEN FOSSIL PLANT PLANT UPDATE Remedial Investigation East Ash Pond • 27 new wells • 22 soil borings with 60 groundwater samples collected • 59 pore water samples collected • Deep soil borings • USGS pumping test ALLEN FOSSIL PLANT UPDATE - 10-08-19 | 5 Remedial Investigation East Ash Pond • Two ar
Slide 47: Pond Closure: CCR Removal and Site Restoration
ALLEN FOSSIL PLANT PLANT UPDATE Pond Closure: CCR Removal • CCR is removed for offsite disposal or beneficial reuse • 7 to 10 years ALLEN FOSSIL PLANT UPDATE - 10-08-19 | 5 Pond Closure: Site Restoration • Backfill with clean soil, cover surface, and prepare for site re-use and development • Continu
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Slide 49: Interim Response Action: Groundwater
ALLEN FOSSIL PLANT PLANT UPDATE Interim Response Action: Groundwater • Groundwater extraction • 360 gallons per minute • Treated water is tested and discharged to the City’s sanitary sewer for further treatment ALLEN FOSSIL PLANT UPDATE - 10-08-19 | 5
Slide 50: Pond Closure: Dewatering
ALLEN FOSSIL PLANT PLANT UPDATE Pond Closure: Dewatering To Outfall 002 • Free water and pore water are removed and treated • Discharged to Outfall 002 ALLEN FOSSIL PLANT UPDATE - 10-08-19 | 5
Slide 51: Serving the People of Memphis
Serving the people of Memphis Serving to make life better the people of Memphis to make Serving Serving Memphis is important life the theto TVA. better people people of Memphis of Memphis We have been honored to partner with Memphis and MLGW for to to more $17 make make thanis85 Memphis Million in t
Slide 52: Interim Response Action: Groundwater Treatment Process
ALLEN FOSSIL PLANT INTERIM RESPONSE ACTION: GROUNDWATER TREATMENT PROCESS GROUNDWATER INTERIM RESPONSE ACTION - TREATMENT PROCESS Allen Fossil Plant Groundwater is pumped North and from extraction wells. South Well Fields Groundwater is FeCl Acid Base Polymer mixed to achieve a homogeneous blend pri
Slide 53: Pond Closure: Dewatering East Ash Pond Water Treatment Process
ALLEN FOSSIL PLANT POND CLOSURE: DEWATERING EAST ASH POND - WATER TREATMENT EAST ASH POND—WATER TREATMENT PROCESS PROCESS Allen Fossil Plant East Ash Pond Coagulant Acid Final pH Outfall Weir Tanks 002 Stilling Pond Adjustment pH adjustment and For each water stream, coagulant addition weir tanks ar
Slide 54: Interim Response Action: Groundwater Treatment Process
ALLEN FOSSIL PLANT INTERIM RESPONSE ACTION: GROUNDWATER TREATMENT PROCESS GROUNDWATER INTERIM RESPONSE ACTION - TREATMENT PROCESS Allen Fossil Plant North and South Well Fields FeCl Acid Base Polymer Clarifier Equalization Reaction Flocculation Post- Tank Tank Tank Clarification T.E. Maxson Thickene
Slide 55: East Ash Pond Water Treatment Process
ALLEN FOSSIL PLANT POND CLOSURE: DEWATERING EAST ASH POND - WATER TREATMENT EAST ASH POND—WATER TREATMENT PROCESS PROCESS Allen Fossil Plant East Ash Pond Coagulant Acid Final pH Outfall Weir Tanks 002 Stilling Pond Adjustment Modular Tank LEGEND Free Water Pore Water Sand and Alumina Storm Water Ba
Slide 56: Environmental Impact Statement—Project Area
ALLEN FOSSIL PLANT ENVIRONMENTAL IMPACT STATEMENT—PROJECT AREA ± Metal Cleaning West Ash Pond Pond ± Metal Cleaning West Ash Pond Pond East Ash Pond Complex \\us1229-f01\work_group\1726\active\172675014\07_historical\gis\mxd\10\ALF East Ash Pond Complex NEPA Map_10.4.mxd East Ash Pond Construction C
Slide 57: Remedial Investigation—Evaluate Alluvial Aquifer and Connections
ALLEN FOSSIL PLANT REMEDIAL INVESTIGATION—EVALUATE ALLUVIAL AQUIFER + CONNECTIONS Evaluate Alluvial aquifer Evaluating the groundwater flow directions helps to understand and predict migration of CCR constituents. • To evaluate groundwater flow directions near the East Ash Disposal Area, 22 shallow,
Slide 58: Remedial Investigation—Next Steps
ALLEN FOSSIL PLANT REMEDIAL INVESTIGATION—NEXT STEPS What are the next steps? Proposed groundwater interim response action • Design, construct and operate Groundwater Extraction/Treatment Systems • Purpose is to control groundwater during pond closure ¯ Figure No. 3-3 nc h ( Title -3 0 -i Deep Strat
Tennessee Valley Authority — Corporate Update (October 2019) on 6ix