Gallatin Fossil Plant

GALLATIN FOSSIL PLANT

Tennessee Valley Authority welcomes you to

Gallatin Fossil Plant Public Open House

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F E R Y R GALLATIN FOSSIL PLANT O A D E

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ODOMS BEND ROAD F E Stilling R Y Pond B R O A D E

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Pond A O

W Stilling E N Units Pond D Stilling Pond C • Bottom Ash Pond ODOMS BEND ROAD Stilling Pond B • Middle Pond A Ash Pond E Ash Cumberland River/ North Rail Pond A Loop Landfill • Ash Pond A Old Hickory Lake Stilling Pond D Stilling • Ash Pond E Pond C Middle Pond A • Stilling Ponds

Ash • Non-Registered Site (NRS) Pond E Cumberland River/ Bottom North Rail Loop Landfill (closed) Old Hickory Lake Ash Pond

Middle • North Rail Loop (NRL) Pond A Landfill (lined CCR landfill)

Non-RBottomegistered SiteAsh (NR PondS)

Figure No. 1 DRAFT Title $$ Bull Run Fossil Plant Historic Seep Locations Non-Registered ¯ Site (NRS) ( Client/Project Tennessee Valley Authority Dry Fly Ash Stack Bull Run Fossil Plant Phase 1

Project Location 175566346 Clinton, Tennessee Prepared by TKR on 2018-08-27 Technical Review by TG on 2018-08-27

Proposed Landfill 0 700 1,400 2,100 2,800 Feet 1:8,400 (At original document size of 22x34) Legend LEGEND Dry Fly Ash Stack kj CumberlHistoric Seepand (Map River ID) Flow Direction Phase 2 P! TAreaVA Gallatinof Concern Fo (AOC)ssil (MapID/AOCPlant Property #) Boundary (Approximate) Dry Fly Ash Stack CCRCCR Unit M anAreaage (Appmenroximate)t Units

Lateral Expansion DRAWN BY: REVIEWED BY: APPROVED BY: REVISION NUMBER: NorthFormer RailDisposal Lo Areaop (NRL) (Approximate) Landfill ³ r e v i R h c n i l C LEGEND Stilling Ponds SluiceCumberl Channeland (ARiverpproximate) Flow Direction 0 1,200 2,400 TVA Gallatin Fossil Plant Property Feet DATE: DEPT: NOTE: AerialProposedBou imagenda dat ryLandfilled (A Februarypp (Aroximate)pproximate) 2017 CCR Management Units North Rail Loop (NRL) Landfill ³ DRAWN BY: REVIEWED BY: APPROVED BY: REVISION NUMBER:

Stilling Ponds 0 1,200 2,400

Feet DATE: DEPT: Former NOTE: Aerial image dated February 2017 Former Disposal Chemical Pond Area Facility Overview Sluice B u l l R u n Creek Channel 1956-1959 Date of commissioning Bottom Ash

Disposal Notes Area 1,950 Facility size1. Coo rdinate(acres) System: NAD 1983 StatePlane Tennessee FIPS 4100 Feet 2. Imagery Provided by Bing Imagery 13,767,000 Cubic yards of coal combustion residuals (CCR) Railroad Loop Pickett trink Gypsum : Disposal Area Claiborne By 27 Disposal Campbell 08 - Area 2A Fentress Scott 2018 - : 976 Megawatts of output Union Grainger Revised Morgan Anderson Jefferson io n.mxd Fly Ash Bull Run Fossil Plant Number of homes powered^_ Knox Stilling 565,000 Cumberland Main Ash Pond See p_Locat Pond 2C Tennessee

Sevier Roane Blount Loudon Acres of CCR unitsRhea closed 70 Bledsoe ee ting\BRF_Historic_ 435 Acres of CCR units to be closed 75 566346\gis\mxds\PublicM

COAL COMBUSTION RESIDUALS

What are coal combustion residuals? Coal combustion residuals, commonly known as coal ash or CCR, are created when power plants burn coal to produce electricity. At Gallatin these residuals include fly ash, bottom ash, and dry FGD scrubber material which are collected separately from different areas of the facility. Bottom ash and fly ash are generated in the boiler. Fly ash is collected in a baghouse, while bottom ash is collected from the boiler. Dry FGD scrubber material is generated by the dry FGD scrubber air quality controls completed in 2015. As of 2019, all CCR generated at Gallatin are disposed of in a lined landfill that began operation in 2016.

Dry FGD Scrubber Material Bottom Ash/Slag

Fly Ash GALLATIN FOSSIL PLANT COAL COMBUSTION RESIDUALS ENVIRONMENTAL INVESTIGATION

What is the Environmental Investigation Plan?

The State of Tennessee (State), the Tennessee Department of Environment and Conservation (TDEC) and the Tennessee Valley Authority (TVA) agreed for TVA to conduct an environmental investigation at Gallatin, which began on July 18, 2016. The environmental investigation includes:

• A hydrogeologic characterization informed by surface geophysical surveys • Development of current conditions groundwater elevation maps • Development of groundwater elevation maps for anticipated future conditions • A private water well survey and water supply well sampling • Establish a permanent groundwater monitoring network including background wells • A characterization of native soils • An evaluation of seeps • An evaluation of impoundment slope stability • An assessment of coal combustion residuals material quantity • An assessment of coal combustion residuals chemical and physical properties • An evaluation of the Cumberland River sediment and benthic invertebrates • An evaluation of the Cumberland River water quality • An evaluation of the Cumberland River fish community and bioaccumulation • An evaluation of groundwater discharge to the Cumberland River • An inventory of karst features • A dye trace study • A hydrogeologic water balance for the ash ponds • An evaluation of potential off-site sources of groundwater contamination At the conclusion of the environmental investigation, TVA will submit a final Environmental Assessment Report (EAR) to TDEC. This report will present the results of the investigation, including the extent to which coal combustion residuals have contaminated the soil, surface water, and groundwater at GAF. The report will also support development of an appropriate corrective action plan at GAF if corrective actions are necessary. TVA has already submitted a draft report on the results of the environmental investigations conducted so far, and TVA will produce a final version of the report when the additional environmental investigation activities conclude. What TVA is doing independent of the Environmental Investigation

Gallatin has on-going environmental studies independent of the Environmental Investigation. To learn more, please visit the following link: https://www.tva.gov/Energy/Our-Power-System/Coal/Gallatin-Fossil-Plant GALLATIN FOSSIL PLANT

ENVIRONMENTAL INVESTIGATION PROCESS

Draft Environmental Environmental Implement Additional EIP Investigation Plan Assessment Report EIP Studies (EIP) (EAR)

Began July 2016 April 28, 2017 Began December 2017

Revision Cycle Address TDEC Comments

Implement Corrective Action and Official Public TDEC Approval EAR Corrective Risk Assessment Plan Comment Period of CARA Plan Action GALLATIN FOSSIL PLANT

ENVIRONMENTAL INVESTIGATIONS

FOCUS AREA EXISTING INFORMATION EIP ACTIVITIES

• Routine visual monitoring and • New analyses (for some units) for normal and instrumentation monitoring earthquake conditions • Existing analyses meet industry • Compared existing models to new data Slope Stability standards • If needed, updated models and reanalyzed • Existing drilling and laboratory • Compared slope stability results to acceptance criteria data support new analyses

• As built/record drawings • Reviewed existing surveys, drawings, and borings Coal Combustion • Aerial surveys performed for • Developed three-dimensional models of CCR units Residuals (CCR) specific projects • Updated three-dimensional models with new boring Material Quantity • Drilled borings history beginning data and water levels in 1953 • Confirmed CCR volumes

• Chemical characterization • Collected CCR material samples from borings in units CCR Chemcial previously completed in 2013 • Collected pore water samples from temporary wells in and Physical and 2016 units Properties • Physical characterization • Analyzed samples for CCR constituents previously completed in 2012 • Analyzed samples for physical properties

• Monitoring well network in • Completed a hydrogeologic characterization of the place for CCR Rule and state GAF permitting requirements • Drilled borings, performed borehole geophysics and reviewed tests; wells located with surface geophysics Hydrogeologic • Installed monitoring wells Investigation • Developed geologic cross sections • Developed current conditions groundwater elevation maps • Developed groundwater elevation maps for anticipated future conditions based on groundwater flow modeling

• Groundwater monitoring has • Establish permanent network of groundwater been ongoing since 1987 monitoring wells based on hydrogeologic investigation, private water well survey, surface geophysics, Groundwater groundwater elevation map, and groundwater flow Investigation modeling for closure conditions • Identify proposed background wells for GAF to establish background groundwater quality

• No existing data available • Visited 235 properties within survey area Private Water • Completed survey form with owner Well Survey • If well present, requested access to sample well • Sampled private water supply wells GALLATIN FOSSIL PLANT

ENVIRONMENTAL INVESTIGATIONS

FOCUS AREA EXISTING INFORMATION EIP ACTIVITIES

• Historical maps of karst features • Desktop study completed • Performed field reconnaissance (TVA & private Karst Inventory / properties) to develop inventory map of karst features Dye Trace Study • Injected dye into karst features, helped characterize subsurface groundwater flow paths • Dye trace study Phase 2 in planning stage

• We had NPDES Permit • Compared measurements of inputs and outputs to the Water Balance ash pond system

• Conducted seep inspections in • Conducted seepage investigation to identify active accordance with Seep Action seeps Plan: • Collected soil and water samples at identified seeps –Quarterly for potential Seepage – • Analyzed samples for CCR constituents seepage areas • Comparative analysis against background soils Investigation ––Monthly for active seepage areas until remediated • Implement Corrective Action Plan if needed • Annual seep inspection report submitted to TDEC

• No previous sediment data • Collected sediment cores, segmented into layers, available analyzed for % ash and CCR-related chemical constituents • TVA benthic community data River Sediments available 2010-2018 • Collected bottom-dwelling organisms (benthic and Benthic invertebrates) from coves adjacent to GAF, upstream, • No previous benthic and downstream Invertebrates bioaccumulation data available • Compared community structure adjacent vs. upstream / downstream • Measured bioaccumulation of CCR-related constituents

• Limited USACE data available, • Collected river water samples from multiple locations but none near GAF in the Cumberland River upstream, adjacent, and River Water downstream of GAF Quality • Analyzed samples for general water quality parameters and CCR-related constituents

• Fish community data available • Caught (via electroshocking and netting), counted (by 2001-2018 species), and released all species of fish present at Fish locations upstream, adjacent, and downstream of GAF Community and • Minimal previous fish bioaccumulation data available • Collected 6-fish composite samples of fish from Bioaccumulation locations upstream, adjacent, and downstream of GAF • Analyzed fish tissues for CCR-related constituents

Near-bottom • TVA data on heated water • Slowly cruised along parallel paths that track the river discharge, but nothing available bank from near-shore to mid-channel, continuously Temperature and to identify smaller thermal monitored water temperature, conductivity, and pH at Conductivity anomalies one half-meter above bottom

• No previous aerial infared • Collected aerial infrared imagery of the Cumberland Aerial Imagery imagery available River under summer and winter conditions

GALLATIN FOSSIL PLANT

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F E R Y R O A D E HISTORIC TIMELINE N

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F ODOMS BEND ROAD

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Y Stilling 1970O R O A

L D E Pond B

N E A 2016

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Ash ponds open. T

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E E N North Rail Loop R Y Ash R O Landfill (NRL) is A Pond A

ODO E MS BENDD ROAD Stilling

Pond B N A Stilling constructed to L Ash N Pond D Pond A Stilling O receive dry FGD Stilling T Pond C Pond D Stilling W Pond C 2009 1953 E N scrubber CCR. 2019 Construction TVA commits up to Ash Pond E GAF stops

Cumberland River/ North Rail Loop Landfill $2 billion to convert coal begins on Old Hickory Lake sending CCR Ash Middle ash storage at all plants Gallatin Fossil ODOMS BEND ROAD Pond A Pond E Stilling and process Pond B to dry storage. North Rail Plant (GAF). Cumberland River/ flows to ash Bottom Loop Landfill Ash Pond Old Hickory Lake ponds. Ash Pond A Middle Stilling Non-Registered Site (NRS) Pond A Pond D Stilling Pond C

Bottom Ash Pond Ash Pond E

LEGEND Cumberland River/ Cumberland River Flow Direction North Rail TVA Gallatin Fossil Plant Property Loop Landfill Old Hickory Lake Boundary (Approximate) CCR Management Units 2013–2015 DRAWN BY: REVIEWED BY: APPROVED BY: REVISION NUMBER: 2016 North Rail Loop (NRL) Landfill ³ 1997–1998

Stilling Ponds 0 1,200 2,400

Feet DATE: DEPT: NOTE: Aerial image dated February 2017 At GAF, TVA invested $1 billion TVA begins environmental Middle NRS is closed. Pond A on the flue gas desulfurization investigations at Gallatin. Non-Registered (FGD) Sitescrubber (NRS) system, selective catalytic reduction 1956–1959 Bottom Ash Pond (SCR) system, and baghouse GAF begins producing installation. power with all four units on-line by 1959. The More than $5.4 billion has Non-Registered Site been spent so far in updating

(NRS) receives ash Non-Registered all of TVA's fossil fuel plants to Site (NRS) produced by GAF. produce cleaner energy.

LEGEND Cumberland River Flow Direction TVA Gallatin Fossil Plant Property Boundary (Approximate) CCR Management Units North Rail Loop (NRL) Landfill ³ DRAWN BY: REVIEWED BY: APPROVED BY: REVISION NUMBER:

Stilling Ponds 0 1,200 2,400

Feet DATE: DEPT: NOTE: Aerial image dated February 2017 LEGEND Cumberland River Flow Direction TVA Gallatin Fossil Plant Property Boundary (Approximate) CCR Management Units North Rail Loop (NRL) Landfill ³ DRAWN BY: REVIEWED BY: APPROVED BY: REVISION NUMBER:

Stilling Ponds 0 1,200 2,400

Feet DATE: DEPT: NOTE: Aerial image dated February 2017 GALLATIN 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 More than 16,000 to develop the and respond to any real‑time sensors to ATIM center coal ash stability issues monitor ash impoundments send before they become an data (24/7/365) to a centralized emergency computer monitoring system Only facility of its kind in the utility LED wall displays Geographic industry in the U.S. Information System (GIS) maps, weather, earthquakes, sensor data

Operations has real-time data or can watch what’s happening at TVA impoundments via live video

System sends alerts on any irregularities ATIM Center Name: Raised Dike Clay Fill Unit Weight: 121 pcf Cohesion': 100 psf Phi': 36 ° Name: Bottom Ash Fill_1 Unit Weight: 87 pcf Cohesion': 0 psf Phi': 40 ° Name: Bottom Ash Fill_2 Unit Weight: 87 pcf Cohesion': 0 psf Phi': 35 ° GALLATIN FOSSIL PLANTName: Starter Dike_1 Unit Weight: 119 pcf Cohesion': 200 psf Phi': 30 ° Name: Starter Dike_2 Unit Weight: 125 pcf Cohesion': 300 psf Phi': 33 ° Name: Alluvial Clay_Toe 3 Unit Weight: 124 pcf Cohesion': 200 psf Phi': 34 ° Name: Weathered Bedrock FIGURE M.8 Name: Ash Dike_Crest 1 Unit Weight: 105 pcf Cohesion': 0 psf Phi': 36 ° Name: Ash Dike_Crest 2 Unit Weight: 105 pcf Cohesion': 0 psf Phi': 32 ° Name: Ash Dike_Intermediate 1 Unit Weight: 105 pcf Cohesion': 0 psf Phi': 36 ° Name: Ash Dike_Intermediate 2 Unit Weight: 105 pcf Cohesion': 0 psf Phi': 32 ° Name: Alluvial Clay_Crest 1 Unit Weight: 123 pcf Cohesion': 200 psf Phi': 34 ° Name: Alluvial Clay_Crest 2 Unit Weight: 125 pcf Cohesion': 300 psf Phi': 34 ° Name: Alluvial Clay_Crest 3 Unit Weight: 125 pcf Cohesion': 200 psf Phi': 32 ° Name: Alluvial Clay_Intermediate 2 Unit Weight: 118 pcf Cohesion': 200 psf Phi': 32 ° SLOPE STABILITYName: Alluvial Clay_Intermediate 3 Unit Weight: 118 pcf Cohesion': 200 psf Phi': 33 ° Name: Sluiced Fly Ash Unit Weight: 94 pcf Cohesion': 0 psf Phi': 28 ° Name: Bottom Ash Pond Fill Unit Weight: 105 pcf Cohesion': 0 psf Phi': 30 ° Name: Gypsum Unit Weight: 105 pcf Cohesion': 0 psf Phi': 38 °

Tennessee Valley Authority Seismic Assessment Bull Run Fossil Plant Gypsum Disposal Area Clinton, TN

Cross Section I-I' - Long-Term Static What it04/27/201 is7 and Example of existing slope2.16 stability analysis 840 Gypsum Ash Dike_Intermediate 1 830 Bottom Ash Pond Fill Ash Dike_Crest 1 Ash Dike_Intermediate 2 why we820 do it Ash Dike_Crest 2 Raised Dike Clay Fill 810

800 These analyses tellSluiced us Fly Ash if the slopes 790 Bottom Ash Fill_1 Starter Dike_1 Alluvial Clay_Crest 1 Bottom Ash Fill_2 780 Alluvial Clay_Crest 2 of the CCRElevation (ft) units are stable. Alluvial Clay_Intermediate 2 Starter Dike_2 Multiple locations770 Alluvial around Clay_Crest 3 each Alluvial Clay_Intermediate 3 Alluvial Clay_Toe 3 760 Weathered Bedrock CCR unit are750 checked for stability. 740 290 310 330 350 370 390 410 430 450 470 490 510 530 550 570 590 610 630 650 670 690 710 730 750 Distance (ft) Normal (long-term) conditions M-30 and earthquake conditions are Inputs: Surface and subsurface geometry/zones, engineering evaluated. properties, water levels/pressures, external loads Outputs: Factor of safety against sliding What TVA had Required analyses to satisfy already done EIP requirements

Slope stability had been analyzed Unit Normal Earthquake many times over the years, for Bottom Ash Pond EE various conditions and at multiple units. Middle Pond A EE Ash Pond A The existing analyses were EE reviewed as part of the evaluation Ash Pond E EE of existing geotechnical data. Stilling Ponds EC Each analysis was reviewed NRS CC for adequate documentation, appropriate methods, and E = Existing analysis C = Completed analysis for EIP representative conditions.

Additional EIP Activities

• Completed new analyses (for some units) for normal and earthquake conditions • Compared slope stability results to acceptance criteria GALLATIN FOSSIL PLANT COAL COMBUSTION RESIDUALS MATERIAL QUANTITY

What it is and CCR Map (Location/Depth) why we do it

Recent surveys of the site track the location and quantity of coal combustion residuals (CCR) to aid overall site management.

5 0 15 5 0 15 10 20 10 20 20 5 20 5 10

What TVA had 10 0 25

0 25 35

35 25 25

20 0 20 20 0 0 20 5 25 0 already done 5 25 10 0 35 25 10 0 0 25 0 35 0

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30 30 • Pre-development topographic maps 15 25 15 25

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5 20 20 • As built/record drawings 30 30 15 20 20 40 20 30 25 10 30 15 15 40 10 5 20 15 25 10 10 10 0 5 10 0 15 25 0

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35 40 10

• Aerial surveys performed for specific projects 20 40 30 40

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5 25 • Drilled borings history beginning in 1953 5 10

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5 20 0 5 10 25 10 10 15 5 5 15 15 Even before construction began, the facility 5 10

0 25 15 5

0 had been extensively mapped. These site 15 5 25 10

10 5

15 15 5 15 5 20 35 10 20

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topographic maps, aerial surveys and 30 10 25 25 15

Figure No. 20 15 5 10 35 35 20 20 45 0 25 30 10 1 35 30 25 5 0 25 30 DRAFT construction updates are used for site 25 50 5 10 35 35 20 Title 30 20 10 0 15 20 40 35 30 25 5 0 SED-CR01 30 30 25 Sediment Sampling 50 5 management. 30 35 10 15

$$ 20 40 ¯ 30 ( Client/Project FLOW Site mapping is typically updated annually as Tennessee Valley Authority Bull Run Fossil Plant well as any time significant changes are made Project Location 175566346 Clinton, Tennessee Prepared by TKR on 2018-08-31 to the layout of the site—whether that means a Technical Review by TG on 2018-08-31

0 1,400 2,800 4,200 5,600 shift of operations from one area to another or Feet LEGEND 1:16,800 (At original document size of 22x34) TVA Gallatin Fossil Plant Property Ash Thickness in feet Figure an increase/decrease in the volumes of materials Boundary (Approximate) 0 - 5 30 - 35 CCR Waste Boundary Legend5 - 10 35 - 40 LEGEND CCR ISOPACH North Rail Loop (NRL) Landfill 10 - 15 40 - 45 Figure SED-CR02 that are stored on site. These mapping updates TVA Gallatin Fossil Plant Property Ash Thickness in feet BoundarySediment (Approximate) Sampling Transect APPROVED BY: Stilling Ponds 15 - 20 45 - 50 ³ 0 - 5 DRAWN BY: 30 - 35REVIEWED BY: REVISION NUMBER: CARRIE.SMITH SCHEIPC REV. 0 20 -CCR 25 Waste50 Boundary - 55 5 - 10 35 - 40 GALLATIN FOSSIL PLANT CCR ISOPACH CCR Unit Are0 a (Approximate)1,200 2,400 are for both inventory management as well as site 25 -North 30 Rail Loop (NRL) Landfill 10 - 15 40TENNESSEE - 45 VALLEY AUTHORITY DATE: DEPT: Feet NOTE: Aerial image dated February 2017 4/27/2017 FOSSIL AND HYDRO ENGINEERING Stilling Ponds 15 - 20 45 - 50 ³ DRAWN BY: REVIEWED BY: APPROVED BY: REVISION NUMBER: Former Disposal Area (Approximate) CARRIE.SMITH SCHEIPC REV. 0 management, ensuring that the CCR units are 20 - 25 50 - 55 GALLATIN FOSSIL PLANT 25 - 30 0 1,200 2,400 TENNESSEE VALLEY AUTHORITY Sluice Channel (Approximate) DATE: DEPT: Feet used to their best potential. NOTE: Aerial image dated February 2017 4/27/2017 FOSSIL AND HYDRO ENGINEERING

Additional EIP Activities

SED-CR03 • Reviewed existing surveys, drawing,Bull Run and Creek borings SED-WB01 • Developed three-dimensional models of CCR units

•SED-WB02 Updated three-dimensional models with new boring data and water levels

SED-CR04 SED-BRC01 r e v i R h c n i l C Notes • Confirmed CCR volumes FLOW SED-BRC02 1. Coordinate System: NAD 1983 StatePlane Tennessee FIPS 4100 Feet 2. Imagery Provided by ESRI Basemap

SED-BRC03 Pickett Claiborne trink :

Campbell

By 31 Fentress Scott 08 -

Union Grainger 2018 - : SED-CR05 SED-BRC04

Revised Morgan Anderson Jefferson Bull Run Fossil Plant li ng.mxd ^_ Knox SED-CR06 Cumberland Tennessee

Sevier Roane Blount Loudon

Bledsoe Rhea ee ting\BRF_Sediment_Samp FLOW SED-CR07 CRM 45

SED-CR08 75 566346\gis\mxds\PublicM

What it is and Proposed Temporary Wells

Old Hickory Lake why we do it (Cumberland River) LEGEND: (! Historical Boring Location

&< Proposed DPT Location

&< Proposed DPT/Temporary Monitoring Well Location The different CCR materials on site 1 2 3 4 5 6 7 Geophysical Survey Line Used

! ( for Selection of Drilling Location Temporary Road ! ( are tested for levels and types of ! ( ! ( ! (

! ( Estimated Pond Extents ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( NRS Boundary Cell Dividers ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( chemical constituents. This helps A ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( 2000' Grid ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( GAF34 ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( TVA Gallatin Boundary ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( GAF37 ! ( ! ( ! ( ! ( ! ( ! ( ! ( us understand whether they leach ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( GAF39 ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( GAF35 ! ( ! ( ! ( ! ( ! ( ! ( from (or leave) the ash and enter the ! ( ! ( ! ( Ash Pond A ! ( Shooting ! ( ! ( ! ( ! ( ! ( ! ( GAF33 ! ( ! ( ! ( ! ( ! ( ! ( ! ( Range ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( GAF36 ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( B ! ( ! ( ! ( ! (

water in the CCR units. & < ! ! ( ( ! ( ! ( ! ( Stilling ! ( ! ( ! ! ( ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( GAF32 ! ( ! ( ! ! ( ( ! ( ! ( ! ( ! ( ! ( Pond B GAF27 ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( & < ! ( ! ( ! ( ! (

GAF24B ! ( & < ! ( ! ( ! ( ! ( ³ ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! (

GAF26 & < ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( GAF28/29C ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( & < ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! (

GAF25 ! (

! ( Coal ! ( ! ( Bottom ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( & < ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! (

! ( Storage ! ( ! ( ! ( Ash ! ( Ash Pond GAF24A ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( Area 0 1,200 2,400 GAF28/29B Complex Pond ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( GAF30 ! ! ( ( ! ( & < ! ( ! ( ! (

D & < ! ( ! ( ! ( ! ( ! ( ! ( & < ! ( ! ( ! ! ( ( ! ( ! (

Chemical & < ! ( ! ( ! ( ! ( & < ! ( ! ( ! ( ! ( ! ( Feet ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( Pond What TVA & < ! ( ! ( ! ( Stilling ! ( ! ( ! ( ! ! ! ! ( ( ( ( ! ( ! ( GAF16 & < ! ( ! ( ! (

& < Asbestos Landfill ! ( ! ( ! ( ! ( ! ( ! ( ! ( & < ! (

C & < ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! (

GAF31 Pond C ! ( ! ( ! ( ! ( & < ! ( ! ( ! ( ! (

Figure No. ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( GAF28/29A & < ! ( & < ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( & < & < ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( B ! ( ! ( ! ( ! ( ! (

Middle & < ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( & < ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( & < ! ( ! ( & < ! ( GAF22/23A ! ( ! ( ! ( ! ( 1 Pond A ! ( ! ( & < ! ( ! ( ! ( ! ( & < ! ( ! ( ! ( ! ( ! ( & <

DRAFT & < ! ( ! ( ! ( ! ( ! ( ! ( ! ( GAF17B ! (

! ( ! (

& < NOTE: Aerial Image based upon Gallatin_Mosaics_2015_SHEET1 thru ! ( ! ( ! ( " ! ( ! ( ! ( ! ( & < ERI LINE 18 ! ( ! ( Title " ! ( SHEET6.TIF and dated March 2015 & < ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( GAF17 ! ( ! ( had done ! ( A Non-Registered Site ! ( ! ( ! ( GAF22/23B! ( C ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( SED-CR01 ! ( ! ( ! ( ! ( ! ( ! ( ! ( GAF38 GAF18 ! ( ! ( ! ( ! ( ! ( (Closed Disposal Area) TENNESSEE VALLEY AUTHORITY ! ( ! ( ! ( ! ( ! ( ! ( Sediment Sampling ! ( & < & < & < & < ! ( ! ( Gallatin Fossil Plant ! ( ! ( ! ( ! ( Ash Pond E

$$ ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! (

GAF21 ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( GAF20 ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ! ( ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ! ( ( ! ( & < ! ( ! ( ! ( ! ( D GAF19 ! ( PROPOSED DPT DRILLING LOCATIONS ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ¯ ! ( Client/Project ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( AND EXISTING BORING DATA ! ( Comprehensive studies were ! (

( ! ( ! ( ! ( ! (

Stilling ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( FLOW ! ( ! ( ! ( ! ( Pond D ! ( ! ( ! ( ! ( ! ( ! ( Tennessee Valley Authority ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( DATE: 7/28/2016 FIGURE: 2-6 ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( conducted in 2012, 2013, and 2016 Bull Run Fossil Plant ! ( DRAWN BY: M. SMITH CHECKED BY:

JOB NUMBER: Project Location to characterize the CCR. 175566346 REVISIONS Clinton, Tennessee Prepared by TKR on 2018-08-31 Technical Review by TG on 2018-08-31 DATE DESCRIPTION Old Hickory Lake (Cumberland River) 0 1,400 2,800 4,200 5,600 Feet The ash material sampled included: 1:16,800 (At original document size of 22x34)

Old Hickory Lake (Cumberland River) Fly Ash and Bottom Ash. LegendLEGEND: SED-CR02 (! Historical Boring Location Sediment Sampling Transect &< Proposed DPT Location

Each sample is tested for physical &< ProposedCCR Unit DPT/Temporary Area (Approximate) Monitoring Well Location

1 2 3 4 5 6 7 GeophysicalFormer Disposal Survey Area Line (A Usedpproximate)

and chemical characteristics,! ( for Selection of Drilling Location Temporary Road Sluice Channel (Approximate) ! ( ! ( ! ( ! (

including! ( leachability and total Estimated Pond Extents ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( NRS Boundary Cell Dividers ! ( ! ( ! ( ! ( ! ( ! ( ! ! ( ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ! ( ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ! ( ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( A ! ( metals. ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ! ( ( 2000' Grid ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ! ( ( ! ( ! ( ! ! ! ( ( ( ! ( ! ( ! ( ! ( ! ( ! ! ( ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ! ( ( ! ! ! ( ( ( ! ( ! ! ( ( ! ( GAF34 ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ! ( ( ! ! ( ( ! ! ! ( ( ( ! ( ! ( ! ( ! ! ( ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( TVA Gallatin Boundary ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ! ( ( ! ( ! ( ! ! ( ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ! ( ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( GAF37 ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ! ( ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( GAF39 ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( GAF35 ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( Ash Pond A ! ( Shooting ! ( ! ( ! ( ! ( ! ! ( ( GAF33 ! ( ! ( ! ( ! ( ! ( ! ( ! ( Range ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( GAF36 ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( B ! ( ! ( ! ( ! ( & < ! ( ! ( ! ! ( ( ! ( Stilling ! ( ! ( ! ( ! ( ! ! ( ( ! ( ! ( ! ( ! ( ! ( ! ( GAF32 ! ( ! ( ! ( ! ( ! ! ( ( ! ( ! ( ! ( Pond B GAF27 ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( & < ! ( ! ( ! ( ! (

GAF24B ! ( & < Bull Run Creek ! ( ! ( ! ( ! (

SED-CR03 ³ ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! (

GAF26 & < ! ( ! ( SED-WB01 ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( GAF28/29C ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( & < ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ! ( ( ! ( ! ( ! (

GAF25 ! (

! ( Coal ! ( ! ( Bottom ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( & < ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ! ( (

! ( Storage ! ( ! ( ! ( Ash ! ( Ash Pond GAF24A ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( Area 0 1,200 2,400 GAF28/29B Complex Pond ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( GAF30 ! ( ! ( & < ! ( ! ( ! (

D & < ! ( ! ( ! ( ! ( ! ( ! ( & < ! ( ! ( ! ( ! ( ! ( ! (

Chemical & < ! ( ! ( ! ( ! ( & < ! ( ! ( ! ( ! ( ! ( Feet ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( Pond & < ! ( ! ( ! ( Stilling ! ( ! ( ! ( ! ! ( ( ! ! ( ( ! ! ( ( GAF16 & < ! ( ! ( ! (

& < Asbestos Landfill ! ( ! ( ! ( ! ( ! ( ! ( ! ( & < ! (

C & < ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! (

GAF31 Pond C ! ( ! ( ! ( ! ( & < ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( SED-WB02 GAF28/29A & < ! ( & < ! ( ! ( Additional EIP! ( Activities ! ( ! ( ! ( ! ( ! ( ! ( & < & < ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( B ! ( ! ( ! ( ! ( ! (

Middle & < ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( & < ! ( ! ( ! ( ! ( ! ( ! ( ! ! ( ( ! ( ! ( ! ( ! ( ! ( ! ( ! ! ( ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( & < ! ( ! ( & < ! ( GAF22/23A ! ( ! ( ! ( ! ( Pond A ! ( ! ( & < ! ( ! ( ! ( ! ( & < ! ( ! ( ! ( ! ( ! ( & < & < ! ( ! ( ! ( ! ( ! ( ! ( SED-CR04 ! ( GAF17B ! (

! (

SED-BRC01! ( & < NOTE: Aerial Image based upon Gallatin_Mosaics_2015_SHEET1 thru ! ( ! ( ! ( " ! ( ! ( ! ( ! ( & < ERI LINE 18 ! ( ! ( " ! ( SHEET6.TIF and dated March 2015

r e v i R h c n i l C & < ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( GAF17 ! ( ! ( Notes ! ( A Non-Registered Site ! ( ! ( ! ( GAF22/23B! ( C ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( GAF38 GAF18 ! ( ! (

FLOW! ( ! ( ! ( (Closed Disposal Area) TENNESSEE VALLEY AUTHORITY ! ( ! ( ! ( ! ( ! ( ! ( ! ( & < & < SED-BRC02 & < • Collected & < CCR material samples from1. Coordinate borings System: NAD 1983 in StatePlane units Tennessee FIPS 4100 Feet ! ( ! ( Gallatin Fossil Plant 2. Imagery Provided by ESRI Basemap ! ( ! ( ! ( ! ( Ash Pond E ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ! ( ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ! ( ( ! ( ! ( ! (

GAF21 ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( GAF20 ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( & < ! ( ! ( ! ( ! ( D GAF19 ! ( PROPOSED DPT DRILLING LOCATIONS ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( • Collected pore water samples from temporary wells in units ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( AND EXISTING BORING DATA ! ( ! ( ! ( ! ( ! ( ! ( Stilling ! ( SED-BRC03 ! ( ! ( ! ( ! ( ! ! ( ( ! ( ! ( ! ( ! ( Pickett ! ( ! ( ! ( ! ( ! ( Pond D ! ( ! ( ! ! ( ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( ! ( DATE: 7/28/2016 FIGURE: 2-6 Claiborne ! ( trink ! ( ! ( ! ( : ! ( ! ( ! ( ! ( ! ( ! ( ! ( DRAWN BY: M. SMITH CHECKED BY: Campbell By 31 • Analyzed samples for CCR constituentsFentress Scott 08 - JOB NUMBER: Union Grainger 2018 - : SED-CR05 REVISIONS SED-BRC04 • Analyzed samples for physical properties DATE DESCRIPTION

Revised Morgan Old Hickory Lake Anderson Jefferson (Cumberland River) Bull Run Fossil Plant li ng.mxd ^_ Knox SED-CR06 • Report the analytical results in the EnvironmentalCumberland Assessment Report (EAR) Tennessee

Sevier Roane Blount Loudon

Bledsoe Rhea ee ting\BRF_Sediment_Samp FLOW SED-CR07 CRM 45

SED-CR08 75 566346\gis\mxds\PublicM

NORTH RAIL LOOP LANDFILL

What it is and why we do it Bottom liner and leachate collection system for the Gallatin North Rail Loop Landfill The North Rail Loop Landfill was permitted with TDEC in 2014 as a Geotextille Filter new landfill with a bottom liner and Capillary Break Layer leachate collection system. Double Sided Geocomposite Drainage Layer Textured HDPE Geomembrane

Compacted Clay Liner A landfill bottom liner is a low River Gravel Bedding permeable barrier consisting of compacted clay, geosynthetic Geologic Buffer (Soil) clay liner, and a geomembrane to separate the CCR materials from the groundwater. A leachate collection system consists of pipes, geocomposite drainage layers and HDPE SDR 11 Perforated Pipe drainage aggregates to collect rainwater that flows to the bottom of the CCR landfill.

Making the bottom liner and leachate collection system

Place geologic buffer and Place geosynthetic clay liner over Install geomembrane over Install geocomposite drainage compacted clay liner compacted clay liner geosynthetic clay liner layer over geomembrane

Install protective ash cover layer and perforated Aerial photo of landfill leachate collection pipe GALLATIN FOSSIL PLANT

HYDROGEOLOGIC INVESTIGATION

What it is and Groundwater Monitoring Well why we do it

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 installing groundwater monitoring wells to collect information about groundwater.

Background (i.e., unaffected by the Gallatin site) and downgradient wells are used to study water quality changes.

What TVA had already done

Several hydrogeologic investigations have been conducted at the Gallatin What is a groundwater Plant to monitor groundwater monitoring well? quality and flow direction to A well specially designed determine compliance with and installed to obtain state regulations and program representative groundwater commitments. quality samples and hydrogeologic information.

Additional EIP Activities

• Additional monitoring wells and piezometers installed to supplement current groundwater monitoring well networks to further investigate groundwater quality and flow direction: –– A total of 163 monitoring wells exist today (on-site and on private property) –– Water levels are gauged monthly GALLATIN FOSSIL PLANT

GAF-515L (! GAF-515N (! GAF-516L GROUNDWATER INVESTIGATIONGAF-516N

S te a m P la n

t N R o e a w d

Glover's Pond t

L a

Monitoring Well Locations GAF-426C n

What it is and e (! GAF-426L (! GAF-426N (! GAF-412C GAF-512U GAF-427C GAF-412L GAF-512L GAF-427L (! why we do it (! GAF-515L UG-7 GAF-414C (! GAF-515N (! (! GAF-511C GAF-516L GAF-414L (! GAF-516N GAF-511L GAF-498CU (! GAF-498CL (! GAF-508K UG-1 GAF-513L (! GAF-498L (! 25 (! (!(! GAF-508C Groundwater samples are collected GAF-407C GAF-508L DG-6 GAF-415C GAF-407L (! (! GAF-407N O S GAF-455T d t (! Stilling om e DG-5 (! GAF-455C frequently to test for a number s B DG-4a (! Pond B (! e m nd Ro DG-2 (! GAF-453C (! GAF-455L ad GAF-514L (! P (! la GAF-416C GAF-420U GAF-455N DG-3 n

t GAF-416L N (! R of quality measures. By testing o e a w d (! Glover's Pond t o (! (! GAF-419L GAF-452Cn (! GAF-454L L GAF-510K GAF-418L GAF-421L GAF-452La

groundwater regularly, TVA can track (! (! GAF-426C n e GAF-510L 24 (! GAF-426L (! (! GAF-426N GAF-470A (! (! GAF-412C GAF-512U GAF-427C (! GAF-422CGAF-512L GAF-456C compliance with regulatory permits GAF-412L (! GAF-427LGAF-402C (! Stilling (!(! (! (!(! GAF-402M UG-7 GAF-403L(! (! Pond DGAF-414CGAF-403NGAF-511C GAF-402L GAF-401L GAF-414L GAF-511LStilling(! GAF-498CU GAF-401N and requirements. (! Pond C GAF-498CLAsh (! GAF-508K UG-1 GAF-513L (! GAF-498L Pond A (! GAF-428L 25 GAF-460A(! (!(! GAF-508C (! GAF-407C (! GAF-508L GAF-406L DG-6 GAF-415C GAF-407L GAF-433L (! (! (! (! O GAF-407N GAF-455T dom (! DG-5 Stilling (! GAF-455C s Be DG-423 (! Pond B (! nd Roa DG-2 (! GAF-453CGAF-461A(! GAF-455L d GAF-514L (! GAF-416C GAF-455N (! DG-3 (! GAF-420U (! GAF-416L ! ( GAF-458C (! (! NRL230 GAF-419L (! GAF-452C ( (! What TVA had (! GAF-454L GAF-452L GAF-510K GAF-418L GAF-421L (! (! GAF-457C 24 (! GAF-510L (! GAF-470A (! North Rail Cumberland River/ (! NRL221 GAF-422C GAF-456C (! (! Loop Landfill ! (! GAF-402C (! Old Hickory LakeStilling (! GAF-403L (! GAF-402M NRL301A (! Pond D GAF-403N GAF-463AGAF-402L GAF-401L Stilling (! GAF-459C GAF-401N NRL301B already done GAF-410U Pond C (! Ash (! (! Ash GAF-428L Pond EGAF-460A Pond A GAF-406L (! ((!! (! GAF-433L GAF-437L (! (! NRL015A GAF-446C Middle (! 23 GAF-461A Pond A NRL015 GAF-446L(! (! (! GAF-458CGAF-465A NRL230 NRL220 Groundwater monitoring has been (! (! GAF-464A (! (! GAF-457C (! NRL227 (! (! Cumberland River/ GAF-449L NRL221 GAF-462ANorth Rail (! Loop Landfill occurring on the Gallatin Plant since Old Hickory Lake GAF-449N NRL301A (! GAF-463A GAF-459C GAF-410U (!(! (! NRL301B (! Ash ((!! Pond E GAF-437LGAF-466A (!GAF-467A (! NRL015A (! 1987 and currently consists of 2 GAF-446C Middle ( Pond A NRL015 (! GAF-446L (! (! GAF-465A GAF-404C (! GAF-469A(! GAF-430L (! GAF-464A GAF-468A Bottom (! NRL220 (! GAF-404L(! NRL227 GAF-434L (! (! GAF-462AGAF-451CR Ash Pond programs: GAF-449L (! (! GAF-449N (! (! GAF-450C GAF-405C GAF-466A (!GAF-467A GAF-451C GAF-405L (! GAF-450L (! (! (! GAF-430L GAF-404C GAF-468A(! (!GAF-469A GAF-404L BottomGAF-447U GAF-434L (! GAF-451CR Ash Pond • State permit monitoring: (! (! GAF-438L (! (! (! (! GAF-450C Non-RegisteredGAF-405C GAF-451C GAF-405L Figure No. GAF-450L Site (NRS) GAF-431L (! (! GAF-447U 27 1 GAF-438L(! GAF-440AR DRA(!FT 20 GAF-439A (! GAF-435L ––North Rail Loop (NRL) Landfill Non-Registered GAF-440U Title Site (NRS) GAF-439U (! (! (! GAF-431L SED-CR01 27 (! Sediment Sampling (! 20 GAF-439A GAF-440AR GAF-435LGAF-441U GAF-439U GAF-440UGAF-448U (! (lined CCR landfill) (! (! GAF-441L $$ (! GAF-448L GAF-441U GAF-448U (! (! GAF-442A GAF-448L GAF-441L GAF-442U ¯ (! GAF-442AS3 GAF-489A ( Client/Project GAF-442U (!26 S3 GAF-489A (!(! (!GAF-489U –Non-Registered Site (NRS) (!26 (!(! (! GAF-489U FLOW – (! Tennessee Valley Authority GAF-526L! GAF-526L 19R ( GAF-444U 19R GAF-444UGAF-432U GAF-432U GAF-432L GAF-432L Bull Run Fossil Plant (!(! (! (! (! (Closed) GAF-445L 22 GAF-445LGAF-436U(!(! 22 (! GAF-436U GAF-436L GAF-436L Project Location 175566346 Clinton, Tennessee Prepared by TKR on 2018-08-31 Technical Review by TG on 2018-08-31 • Federal Coal Combustion Residuals Note: Well cluster IDs are stacked from shallowest to deepest well screen interval. Note: Well0 cluster 1,400 IDs are stacked 2,800 from 4,200 5,600 (CCR) Rule monitoring: shallowest to deepest well screen interval. Feet LEGEND 1:16,800 (At original document size of 22x34) Figure 1 (! Monitoring Well Location Glover's Pond Legend(! Non-TVA Monitoring Well Location Stilling Ponds –Bottom Ash Pond, Middle Pond A, LEGEND – TVA Gallatin Fossil Plant Property Cumberland River Direction of Flow MONITORING WELL LOCATIONS Figure 1 SED-CR02 (! BoundaryMonitoring (Approximate) Well Location Glover's Pond Sediment Sampling Transect CCR Management Units ³ DRAWN BY: REVIEWED BY: APPROVED BY: REVISION NUMBER: (! Ash Pond A, Ash Pond E Non-TVA Monitoring Well Location Stilling Ponds MARK.P.SMITH C.GARLINGTON REV. 1 North Rail Loop (NRL) Landfill CCR Unit Area (Approximate) 0 1,200 2,400 GALLATIN FOSSIL PLANT TVA Gallatin Fossil Plant Property TENNESSEE VALLEY AUTHORITY CumberlandFeet River Direction of Flow MONITORING WELL LOCATIONS DATE: DEPT: NOTE: AerialBoundary image dated February (Approximate) 2017 ––North Rail Loop Landfill GIS\monitoring_well_locations.mxd Q:\DCS\Projects\L-URS\Jobs4\_Projects\TVA\Gallatin\_General\EIP\11.0 Document Path: Former Disposal Area (Approximate) 9/12/2019 FOSSIL AND HYDRO ENGINEERING CCR Management Units ³ DRAWN BY: REVIEWED BY: APPROVED BY: REVISION NUMBER: Sluice Channel (Approximate) MARK.P.SMITH C.GARLINGTON REV. 1 North Rail Loop (NRL) Landfill 0 1,200 2,400 GALLATIN FOSSIL PLANT TENNESSEE VALLEY AUTHORITY Feet DATE: DEPT: NOTE: Aerial image dated February 2017

Document Path: Q:\DCS\Projects\L-URS\Jobs4\_Projects\TVA\Gallatin\_General\EIP\11.0 GIS\monitoring_well_locations.mxd Q:\DCS\Projects\L-URS\Jobs4\_Projects\TVA\Gallatin\_General\EIP\11.0 Document Path: 9/12/2019 FOSSIL AND HYDRO ENGINEERING Additional EIP Activities

• Groundwater samples collected from background and downgradient locations SED-CR03 Bull Run Creek SED-WB01 • Groundwater samples collected per Environmental Investigation Plan (EIP) schedule, Federal Coal Combustion Residuals (CCR) rule requirements, and state compliance requirements

SED-WB02 • Analytical results to be reported in the Environmental Assessment Report (EAR) SED-CR04 SED-BRC01 r e v i R h c n i l C Notes FLOW SED-BRC02 1. Coordinate System: NAD 1983 StatePlane Tennessee FIPS 4100 Feet 2. Imagery Provided by ESRI Basemap

SED-BRC03 Pickett Claiborne trink :

Campbell

By 31 Fentress Scott 08 -

Union Grainger 2018 - : SED-CR05 SED-BRC04

Revised Morgan Anderson Jefferson Bull Run Fossil Plant li ng.mxd ^_ Knox SED-CR06 Cumberland Tennessee

Sevier Roane Blount Loudon

Bledsoe Rhea ee ting\BRF_Sediment_Samp FLOW SED-CR07 CRM 45

SED-CR08 75 566346\gis\mxds\PublicM

PRIVATE WATER WELL SURVEY

What it is and why we do it

A water use survey is a search for private water supplies (e.g. wells, springs) located within a 1-mile radius north of the Gallatin Fossil Plant. It is used to evaluate the quality of groundwater used in these private wells.

Private Water Well Survey Area

031 0 1,200 2,400 001 !!!!!!!!!!!!! !!!!!!!!!!!!! SCALE IN FEET !!!!!!!!!!!!! 003 026 007 005 !!!!!!!!!!!!! ! !!!!!!!!!!!!! ( !!!!!!!!!!!!! 004 ! 008 002 ! ( ( 021

!!!!!!!!!!!!011 001 024 ! 025 !!!!!!!!!!!!( 012 010 ! !!!!!!!!!!!! !!!!! ( !!!!!!!!!!!!013 009 !!!!! !!!!!!!!!!!! 006 !!!!! !!!!!!!!!!!! !!!!!

028 029 !!!!!!!!!!!! 067 !!!!! !!!!!!!!!!!!014 !!!!! 022 !!!!!!!!!!!! !!!!! 065

027 066 !!!!! 064 031 !!!!! !!!!! 023 015 116 016 010 088 !!!!!!!! !!!!!!!!

078 079 080 !!!!!!!! 089 !!!!!!!! 081 033 082 !!!!083 !!!! 084 019 085 017 086 !!!!!!!! 020 087 090 !!!!!!!! 034 018 !!!!!!!! !!!!!! 061 077 115 062 076 !!!!!! 075 074 114 !!!!!! 073 !!!!!! !!!!!!!!!!!!!!!!! 072 091 071 113 070 !!!!!! !!!!!!!!!!!!!!!!! 069 035 ! ( 068 !!!!!!092 !!!!!!!!!!!!!!!!!! 112 !!!!!!!!!!!!!!!!! ( 051 036 !!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!060 053 111 093 !!!!!!!!!!!!!!!!! !!!!!!!! !!!!!!!!!!!!!!!!! 047 !!!!!!!!094 !!!!!!!!!!!!!!!!! 030 110 !!!!!!!! !!!!!!!!!!!!!!!!! 054 !!!!!!!!095 !!!!!!!!!!!!!!!!!059 !!!!!!!! !!!!!!!!!!!!!!!!! 052 109 !!!!!!!! !!!!!!!!!!!!!!!!!049 096 !!!!!!!!!!!!!!!!!058 !!!!!!!!!!!!!!!!! 108 !!!!!!!!!!!!!!!!! 097 !!!!!!!!!!!!!!!!!057 !!!!!!! !!!!!!!!!!!!!!!!! 032 107 !!!!!!! !!!!!!!!!!!!!!!!! !!!!!!!! !!!!!!!098 !!!!!!!!!!!!!!!!! !!!!!!!! !!!!!!! ! !!!!!!!! !!!!!!!

106 ( !!!!!!!!037 099 !!!!!!!! 048 !!!!!!!! 028 100 056 050 038 105 !!!!! !!!!! !!!!! 101 !!!!!!!!!!!!!!!!!039 !!!!!

!!!!!!!!!!!!!!!!! !!!!!104 046 !!!!!!!!!!!!!!!!! !!!!! !!!!!!!!!!!!!!!!! !!!!! 117 !!!!!!!!!!!!!!!!! !!!!! !!!!!!!!!!!!!!!!!044 102 063 !!!!!!!!!!!!!!!!! 103 !!!!!!!!!!!!!!!!!

!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!! 055 219 040 ! 045 218 ( 220 217 221 216 !!!!!!!! LEGEND !!!!!!!! 043 !!!!!!!!215 !!!!!!!! LAST SAVED: 7/19/2017AM8:55:23 222 !!!!!!!!!!!!!!!!!!!!!

― !!!!!!!!!!!!!!!!!!!!! 214 !!!!!!!!!!!!!!!!!!!!! ! WELL 041 ( !!!!!!!!!!!!!!!!!!!!! 213 !!!!!!!!!!!!!!!!!!!!! 223 136 !!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!042 !!!!!!!!!!!!!!!!!!!! 212 !!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!224 !!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!! SURVEY COMPLETE !!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!! 211 !!!!!!!!!!!!!!!!!!!!! !!!!!!!!! 121 225 !!!!!!!!!!!!!!!!!!!!! !!!!!!!!! 210 !!!!!!!!!!!!!!!!!!!!! 170 !!!!!!!!! !!!!!!!!!208 135 226 !!!!!!!!! SURVEY COMPLETE - WELLS !!!!!!!!!

USER:― craumann !!!!!!!!!209 PRESENT 132 !!!!!!!!! 172 !!!!!!!!! !!!!!!!!! 138 ! !!!!!!!!! 119 198 ( 171 207 !!!!!!!!! NOT SURVEYED - VACANT OR !!!!!!!!!!!!!!!!!! !!!!!!!!! !!!!!!!!!!!!!!!!!! !!!!!!!!! 118 137 !!!!!!!!!!!!!!!!!! 206 ABANDONED !!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!! 227 205 ! !!!!!!!!!!!!!!!!!! ( 173 !!!!!!!!!!!!!!!!!! 204 NOT SURVEYED - REFUSED TO !!!!!!!!!!!!!!!!!! 120 228 !!!!!!!!!!!!!!!!!! 141 139 203 !!!!!!!!!!!!!!!!!! !!!!!!!!!!!!! PARTICIPATE !!!!!!!!!!!!!!!!!! 169 !!!!!!!!!!!!! !!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!229 202 !!!!!!!!!!! !!!!!!!!!!!!!!!!!! !!!!!!!!!!!!! !!!!!!!!!!!! 131 !!!!!!!!!!! 122 !!!!!!!!!!!!!!!!!! !!!!!!!!!!!!! 201 !! !!!!!!!!!! !!!!!!!!!!! !!!!!!!!!!!!!!!!!! !!!!!!!!!!!!! NOT SURVEYED - ATTEMPTED, ! !! !!!!!!!!!!

( 231 !!!!!!!!!!! !!!!!!!!!!!!!!!!!! !! !!!!!!!!!! !!!!!!!!!!! !!!!!!!!!!!!!!!!!! 200 130 232 230 !! !!!!!!!!!! BUT NO RESPONSE !!!!!!!!!!! !!!!!!!!!!!!!!!!!! ! !!!!!!!!!!!! !!!!!!!!!!! !!!!!!!!!!!!!!!!!! ( 199 !!!!!!!!!!! !!!!!!!!!!!!!!!!!! !!!!! 133 167 ! !!!!!!!!!!! !!!!!!!!!!!!!!!!!! !!!!! 235 ( !!!!!!!!!!! 134 !!!!!!!!!!!!!!!!!! !!!!! ! 234 233 ( 174 !!!!!!!!!!! !!!!!!!!!!!!!!!!!! !!!!!! 124 ( !!!!!!!!!!! !!!!!!!!!!!!!!!!!! 145 168 ZONE WITHIN ONE MILE OF SITE

!!!!!!!!!!! !!!!!!!!!!!!!!!!!! 158 !!!!!!!!!!! !!!!!!!!!!!!!!!!!! 123 166 175 !!!!!!!!!!! !!!!!!!!!!!!!!!!!! 176 !!!!!!!!!!! !!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!! 126 142 !!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!! 157 177 127 140 VACANT/ABANDONED !!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!! 164 125 !!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!! SITE BOUNDARY 165 !!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!! PARCEL !!!!! !!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!! 163 178 128 155 !!!!! !!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!! !!!!!129 !!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!

196 147 !!!!! !!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!! 162 143 !!!!! !!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!! 148 !

( 144 ( !!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!146 !!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!! NOTES 152 149 195 !!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!! 151 179 !!!!!!!!!!!!!!! 156 161 194 1. PARCEL LABELS CORRESPOND TO 192 !!!!!!!!!!!!!!! 161 !!!!!!!!!!!!!!! 154 180 193 153 !!!!!!!!!!!!!!! !

( GAFPV ID NUMBERS IN THE PARCEL DATA 197 !!!!!!!!!!!!!!! !!!! 189 !!!!!!!!!!!!!!! 150 !!!! !

191 ( !!!! ! 159 183 TABLE (E.G., 001 = GAFPV-001). ! ( !!!! ( 160 !!!! ! ( !!!! 2. PARCEL BOUNDARY SOURCE: SUMNER ! 190 !!!! ( 181 185 !!!! ! ( COUNTY TAX ASSESSOR'S OFFICE 188 182 3. BASE MAP SOURCE: ESRI

184 TENNESSEE VALLEY AUTHORITY GALLATIN FOSSIL PLANT 187

186 VACANT/ABANDONED WATER SUPPLY WELL PARCEL SURVEY RESULTS

SCALE: AS SHOWN JULY 2017 FIGURE 7 GIS FILE PATH: G:\41803_TVA_GAF\Global\GIS\Maps\2017_07\41803_001_0007_SURVEY_RESULTS_ONE_MAP.mxd FILEGIS PATH:

Additional EIP Activities

• Performed a door-to-door survey for private water wells (235 properties surveyed) • Recorded water use data • Conducted sampling for CCR constituents and compared to United States Environmental Protection Agency drinking water standards • Results will be provided in the Environmental Assessment Report (EAR) GALLATIN FOSSIL PLANT

Stilling KARST INVENTORY / DYE TRACE STUDY Pond B

Ash Pond A Stilling Pond D Stilling Pond C

Nor Ral Ash Loop Landll Pond E

Karst Inventory Survey Area Middle What it is and Pond A

why we do it Bottom Ash Pond

A karst inventory is a search for Non-Registered karst features including sinkholes, Site (NRS) Figure No. swallets, karst windows, caves, 1 DRAFT Title SED-CR01 springs and sinking creeks or Sediment Sampling $$ ^_1 (A0-SH-3) streams on TVA's Gallatin Fossil ¯ ( Client/Project FLOW Plant property and within a 1-mile Tennessee6 (C1-SH-15) Valley Authority Bull Run^_ Fossil Plant radius north of the Plant. Project Location 175566346 Clinton, Tennessee Prepared by TKR on 2018-08-31 Stilling Technical Review by TG on 2018-08-31 Pond B A dye trace study involved the 2 (D2-SH-22) 0 1,400 2,800 4,200 5,600 ^_ Feet 1:16,8005 (GAF-456C) (At original document size of 22x34) introduction of dye into subsurface Stilling Ash ^_ Pond D Stilling LegendPond A Pond C LEGEND SED-CR02 drainage pathways and monitoring TVA Gallan Fossl Plan Propr Slln Ponds Figure BoundarSediment (Approxma) Sampling Transect where the dye flows. 1 Ml Radus CCR Unit Area (Approximate) ARST INVENTORY OVERVIEW North Rail Ash Parcl 4 (GAF-459C)Loop Landfill Pond E ^_ Former Disposal Area (Approximate) Dd No Sur Parcl ³ DRAWN BY: REVIEWED BY: APPROVED BY: REVISION NUMBER: MAR.P.SMITH SCHEIPC REV. 7 Middle CCR Manamn Uns The Phase 1 dye trace study 0 2,000 4,000 GALLATIN FOSSIL PLANT Pond A Sluice Channel (Approximate) TENNESSEE VALLEY AUTHORITY Nor Ral Loop (NRL) Landll F DATE: DEPT: was conducted to identify NOTE: Aral ma dad Fbruar 2017 4/28/2017 FOSSIL AND HYDRO ENGINEERING

Bottom potential locations of groundwater Ash Pond discharge or springs. Phase 1 Dye Injection Locations Figure No. 1 Non-Registered DRAFTSite (NRS) 1 (A0-SH-3) Title ^_ SED-CR01 Phase 2 currently being planned. $$ Sediment Sampling SED-CR03 ¯ Bull Run Creek 6 (C1-SH-15) Client/Project SED-WB01 ( ^_

FLOW Tennessee Valley Authority Bull Run Fossil Plant

Project Location 175566346 SED-WB02 Clinton, Tennessee Prepared by TKR2 (D2-SH-22) on 2018-08-31 Technical Review b^_y TG on 2018-08-31 SED-CR04 5 (GAF-456C) SED-BRC01 0 1,400 2,800 4,200 5,600 ^_ Figure r e v i R h c n i l C Feet Notes FLOW 1:16,800 (At original document size of 22x34) SED-BRC02 1. Coordinate System: NAD 1983 StatePlane Tennessee FIPS 4100 Feet Legend 2. Imagery Provided by ESRI Basemap LEGEND: ³ Attachment 2B SED-CR02 ^_ DyeSediment Injection Sampling Location Transect SED-BRC03 4 (GAF-459C) TVA Gallatin Boundary Pickett ^_ DYE INJECTION LOCATIONS CCR Unit Area (App roximate) Claiborne trink : By Campbell 31 ³ Fentress Scott DRAWN BY: REVIEWED BY: APPROVED BY: REVISION NUMBER: 08 - Former Disposal Area (Approximate) MARK.P.SMITH DOYLER REV. 4 Union Grainger 2018 - GALLATIN FOSSIL PLANT

: 0 2,500 5,000 SED-CR05 Sluice Channel (Approximate) TENNESSEE VALLEY AUTHORITY SED-BRC04 NOTE: Additional locations will be determined as the dye trace progresses. DATE: DEPT: Feet NOTE: ESRI Imagery 9/17/2019 FOSSIL AND HYDRO ENGINEERING Morgan Anderson Jefferson Bull Run Fossil Plant li ng.mxd Revised Additional EIP Activities ^_ Knox SED-CR06 Cumberland Tennessee

Sevier Roane Blount • Desktop study completed Loudon Bledsoe Rhea ee ting\BRF_Sediment_Samp FLOW SED-CR07 •CRMPerformed 45 field reconnaissance (TVA & private properties) to develop inventory map of Karst SED-CR08 features SED-CR03 Bull Run Creek

75 566346\gis\mxds\PublicM SED-WB01 • Dye trace study Phase 1 completed Disclaimer: Stantec assumes no responsibility for data supplied in electronic format. The recipient accepts full responsibility for verifying the accuracy and completeness of the data. The recipient releases Stantec, its officers, employees, consultants and agents, from any and all claims arising in any way from the content or provision of the data. Page 01 of 01 U:\TVA-EIP\1

SED-WB02 • Dye trace study Phase 2 in planning stage

SED-CR04 SED-BRC01 r e v i R h c n i l C • Results will be provided in the Environmental Assessment Report (EAR) Notes FLOW LEGEND: SED-BRC02 1. Coordinate System: NAD 1983 StatePlane Tennessee FIPS 4100 Feet Attachment 2B ^_ Dye2. Imagery Injection Provided Location by ESRI Basemap TVA Gallatin Boundary DYE INJECTION LOCATIONS

SED-BRC03 Pickett ³ DRAWN BY: REVIEWED BY: APPROVED BY: REVISION NUMBER: Claiborne MARK.P.SMITH DOYLER REV. 4 trink : GALLATIN FOSSIL PLANT By 0 2,500 5,000 Campbell 31 Fentress Scott TENNESSEE VALLEY AUTHORITY

08 - NOTE: Additional locations will be determined as the dye trace progresses. DATE: DEPT: Feet NOTE: ESRI Imagery Union Grainger 9/17/2019 FOSSIL AND HYDRO ENGINEERING 2018 - : SED-CR05 SED-BRC04

Morgan Anderson Jefferson Bull Run Fossil Plant li ng.mxd Revised ^_ Knox SED-CR06 Cumberland Tennessee

Sevier Roane Blount Loudon

Bledsoe Rhea ee ting\BRF_Sediment_Samp FLOW SED-CR07 CRM 45

SED-CR08 75 566346\gis\mxds\PublicM

EXAMPLE KARST INVENTORY RESULTS

LEGEND: 1930 Toporapc Dd No Sur A6-RO-2 Lo Parcl / Devils A6-RO-1 Tea Table Inrmn 1 Ml Radus $ ^_ Drana 2000' Grd 1952 Toporapc A6-STR-1 Lo TVA Gallan ^_ Inrmn Boundar ^_A5-SH-9 Drana ^_ GPS Fld USGS Sram Obsraon

Historically Reported Karst Features $ 1930 C! USGS Snol ! 1950 (!== Rpard 1977 #A6-SH-6 # 1951 (!=> Rpard 1978 " 1952 (!?) Rpard 1990 A6-SH-4 # X 193 (!)= Rpard 2007 ^ 1970 (!4) Rpard 2010

#A6-SH-5 E 2010 #A6-SH-2 Nos: 1. Rr o S 0 or addonal nos rardn 1951 A5-SP-1 / aurs. A5-SS-1 2. Rr o ars Innor Caalo or urr daa ^_ rardn ac aur nod rn.

A5-SP-2 / A5-RO-2 AA-1 AA0 AA1 AA2 A5-SS-2 ^_ A5 A6 A6-SH-8 ^_ # A-2 A-1 A0 A1 A2 A3 A4 A5 A6 A7

B-2 B-1 B0 B1 B2 B3 B4 B5 B6 B7 A6 A7 C-2 C-1 C0 C1 C2 C3 C4 C5 C6 C7 A6-SH-9 A5-SH-3 # # C!A6-SH-3 D-2 D-1 D0 D1 D2 D3 D4 D5 D6 S E-2 E-1 E0 E1 E2 E3 TE AM P F-1 LA F0 F1 F2 NT R D G1 G2

#A7-SH-1 ³

#A6-SH-7 0 250 500 F DATA SOURCES: DDS Ennrn 2017 TENNESSEE VALLEY AUTHORITY Gallatin Fossil Plant

A6-SH-1 # KARST INVENTORY A5 A6 A7 B5 B6 B7 Map Grid: A6

DATE: 3/3/2017 SHEET:15

B5 B6 B6 B7 DRAWN BY: M. SMITH CHECED BY: W. UTSCHE

JOB NUMBER: 0513955

LEGEND: 1930 Toporapc Dd No Sur A6 A7 A5 A6 Lo Parcl #A6-SH-1 Inrmn 1 Ml Radus Drana A5 A6 A7 2000' Grd B5 B6 B7 1952 Toporapc Lo TVA Gallan Inrmn Boundar Drana ^_ GPS Fld USGS Sram Obsraon

Historically Reported Karst Features $ 1930 C! USGS Snol B6-SH-3 # ! 1950 (!== Rpard 1977 # 1951 (!=> Rpard 1978 " 1952 (!?) Rpard 1990 B6-SH-4 # X 193 (!)= Rpard 2007 ^ 1970 (!4) Rpard 2010

E 2010 Nos: 1. Rr o S 0 or addonal nos rardn 1951 "B5-STR-2 aurs. 2. Rr o ars Innor Caalo or urr daa rardn ac aur nod rn. B5 B6

AA-1 AA0 AA1 AA2 B5-STR-1 #B5-SH-7 B6 B7 ^_ A-2 A-1 A0 A1 A2 A3 A4 A5 A6 A7 B6-STR-1 ^_ B-2 B-1 B0 B1 B2 B3 B4 B5 B6 B7 C-2 C-1 C0 C1 C2 C3 C4 C5 C6 C7 #B5-SH-8 #B7-SH-4 D-2 D-1 D0 D1 D2 D3 D4 D5 D6 X E-2 E-1 E0 E1 E2 E3 F-1 F0 F1 F2 B5-SH-2 X G1 G2 #B6-SH-1 #B7-SH-2

#B5-SH-3 ³

0 250 500

B6-SH-2 # #B7-SH-1 F DATA SOURCES: DDS Ennrn 2017 TENNESSEE VALLEY AUTHORITY Gallatin Fossil Plant

KARST INVENTORY B5 B6 B7 C5 C6 C7 Map Grid: B6

DATE: 3/2/2017 SHEET:25 C5 C6 C6 C7 DRAWN BY: M. SMITH CHECED BY: W. UTSCHE XC5-SH-7 JOB NUMBER: 0513955 GALLATIN FOSSIL PLANT

SEEPAGE INVESTIGATION

Stilling What it is and Seep Locations Pond B why we do it Stilling Pond D Stilling Pond C

Dikes on the property are Ash Pond A checked frequently to identify active seeps.

Stilling Pond B North Rail Cumberland River/ Loop Landfill The soils and water at active Old Hickory Lake Ash Pond E

seep areas are tested for CCR Middle Pond A Stilling Pond D constituent levels. Stilling Pond C

Ash Pond A ") Bottom What TVA had 13 Ash Pond 2E")

Cumberland River/ North Rail already done Loop Landfill Old Hickory Lake

Ash Pond E • Conduct seep inspections in Middle Pond A Non-Registered Site (NRS) accordance with Seep Action ")1A Figure No. Plan: 1 DRAFT Title ") Bottom SED-CR01 Sediment Samp13ling Ash Pond –Quarterly for potential 2E – ¯$$ ") ( Client/Project seepage areas

FLOW Tennessee Valley Authority Bull Run Fossil Plant ––Monthly for active seepage Project Location 175566346 Clinton, Tennessee PreparedNon-Registered by TKR on 2018-08-31 areas until remediated Technical ReviewSite b(NRS)y TG on 2018-08-31 ")1A 0 1,400 2,800 4,200 5,600 Feet • Annual seep inspection 1:16,800 (At original document size of 22x34)

report submitted to TDEC LegendLEGEND Figure SED-CR02 Cumberland River Flow Direction Sediment Sampling Transect in accordance with National ") Seep Location

CCRCCR Management Unit Area (A Unitspproximate) SEEP LOCATIONS Pollutant Discharge Elimination North Rail Loop (NRL) Landfill StillingFormer Ponds Disposal Area (Approximate) ³ DRAWN BY: REVIEWED BY: APPROVED BY: REVISION NUMBER: System (NPDES) permit MARK.P.SMITH S.VEENSTRA REV. 0 TVA Gallatin Fossil Plant Property Sluice Channel (Approximate) 0 1,200 2,400 GALLATIN FOSSIL PLANT Boundary (Approximate) TENNESSEE VALLEY AUTHORITY Feet requirements DATE: DEPT: NOTE: Aerial image dated February 2017 9/9/2019 FOSSIL AND HYDRO ENGINEERING

LEGEND Figure Cumberland River Flow Direction ") Seep Location Additional EIP ActivitiesCCR Management Units SEEP LOCATIONS North Rail Loop (NRL) Landfill Stilling Ponds ³ DRAWN BY: REVIEWED BY: APPROVED BY: REVISION NUMBER: MARK.P.SMITH S.VEENSTRA REV. 0 TVA Gallatin Fossil Plant Property Bull Run Creek 0 1,200 2,400 GALLATIN FOSSIL PLANT SED-CR03 • Conducted seepage investigation to Boundaryidentify (Approximate) active seeps TENNESSEE VALLEY AUTHORITY Feet DATE: DEPT: SED-WB01 NOTE: Aerial image dated February 2017 9/9/2019 FOSSIL AND HYDRO ENGINEERING • Collected soil and water samples at identified seeps

SED-WB02 • Analyzed samples for CCR constituents

SED-CR04 SED-BRC01 r e v i R h c n i l C • Compared analysis against backgroundNotes soils FLOW SED-BRC02 1. Coordinate System: NAD 1983 StatePlane Tennessee FIPS 4100 Feet • Report the analytical results in the 2.EnvironmentalImagery Provided by ESRI Basemap Assessment Report (EAR)

SED-BRC03 Pickett • Develop Corrective Action Plan if needed Claiborne trink :

Campbell

By 31 Fentress Scott 08 -

Union Grainger 2018 - : SED-CR05 SED-BRC04

Revised Morgan Anderson Jefferson Bull Run Fossil Plant li ng.mxd ^_ Knox SED-CR06 Cumberland Tennessee

Sevier Roane Blount Loudon

Bledsoe Rhea ee ting\BRF_Sediment_Samp FLOW SED-CR07 CRM 45

SED-CR08 75 566346\gis\mxds\PublicM

CUMBERLAND RIVER INVESTIGATIONS

INVESTIGATION ACTIVITIES PERFORMED PURPOSES

• Collected sediment cores, segmented • Assess extent of CCR present in river into layers, analyzed for % ash & • Evaluate whether GAF operations affect CCR-related chemical constituents benthic ecology • Collected bottom-dwelling organisms • Evaluate whether GAF operations affect River Sediments (benthic invertebrates) from coves bioaccumulation and whether levels of adjacent to GAF, upstream, and and Benthic constituents are at harmful levels downstream Invertebrates • Compared community structure adjacent vs upstream/downstream • Measured bioaccumulation of CCR-related constituents

• Collected river water samples from • Compare with historical data and upstream/ multiple locations in the Cumberland downstream to evaluate whether GAF River upstream, adjacent, and operations affect Cumberland River water River Water downstream of GAF quality Quality • Analyzed samples for general water quality parameters and CCR-related constituents

• Caught (via electroshocking and netting), • Evaluate whether GAF operations affect fish counted (by species), & released all ecology species of fish present at locations • Evaluate whether GAF operations affect upstream, adjacent, and downstream of bioaccumulation and whether levels of Fish GAF constituents are at harmful levels Community and • Collected 6-fish composite samples of Bioaccumulation fish from locations upstream, adjacent, and downstream of GAF • Analyze fish tissues for CCR-related constituents

• Slowly cruised along parallel paths that • Identify any temperature or conductivity Near-bottom tracked the river bank from near-shore anomalies that might be due to submerged Temperature and to mid-channel, continuously monitoring seeps or springs Conductivity water temperature, conductivity, and pH at one meter above the bottom

• Collected aerial infrared imagery of the • Identify any temperature anomaly Aerial Imagery Cumberland River under summer and “signatures” that reach the water surface winter conditions GALLATIN FOSSIL PLANT CUMBERLAND RIVER SEDIMENTS SAMPLING LOCATIONS

Sediment Sample Locations

Figure No. 1 DRAFT Title SED-CR01 ¯$$ Sediment Sampling ( Client/Project

FLOW Tennessee Valley Authority Bull Run Fossil Plant

Project Location 175566346 Clinton, Tennessee Prepared by TKR on 2018-08-31 Technical Review by TG on 2018-08-31

0 1,400 2,800 4,200 5,600 Feet 1:16,800 (At original document size of 22x34) Legend SED-CR02 Sediment Sampling Transect

CCR Unit Area (Approximate)

Former Disposal Area (Approximate)

Sluice Channel (Approximate)

SED-CR03 Bull Run Creek SED-WB01

SED-WB02

SED-CR04 SED-BRC01 r e v i R h c n i l C Notes FLOW SED-BRC02 1. Coordinate System: NAD 1983 StatePlane Tennessee FIPS 4100 Feet 2. Imagery Provided by ESRI Basemap

SED-BRC03 Pickett Claiborne trink :

Campbell

By 31 Fentress Scott 08 -

Union Grainger 2018 - : SED-CR05 SED-BRC04

Revised Morgan Anderson Jefferson Bull Run Fossil Plant li ng.mxd ^_ Knox SED-CR06 Cumberland Tennessee

Sevier Roane Blount Loudon

Bledsoe Rhea ee ting\BRF_Sediment_Samp FLOW SED-CR07 CRM 45

SED-CR08 75 566346\gis\mxds\PublicM

SEDIMENT CORE SAMPLE GALLATIN FOSSIL PLANT

BENTHIC INVERTEBRATE ORGANISMS (!RM2480 *#CuRM 248 *#CuRM 247

(!CV3

Co 3 CRE1 RM2480 (! (! CuRM 249 *#CuRM 248 Co 4 *# *#CuRM 247 (!CV4

CV3 (! RM240(! *#CuRM 246 (!RM2395 SllnCo 3 CuRM 240 CRE1 Pond B *# RM2401 (! CuRM 249 *#CuRM 239 (! Co 4 *# (!CV4 Slln CRS2 Pond D Slln RM2405(!(! Pond C RM240 GALLATIN FOSSIL PLANT RM2407 (! As (! *#CuRMPond A 246 RM2395 (! CuRM 250 Slln *# As Pond B CuRM 240 Pond E CuRM 239 *# (!RM2401 Nor Ral *# RM2410 Loop Landll RM2450 (!*# (! Figure No. CuRM 241 *#CuRM 245 Slln CRS9 Mddl 1 Pond D Slln (! RM2405 CRS2(! DRAFT Pond A (! Pond C CRW19 (! Title RM2407 As SED-CR01 (! Pond A CRW18(! Sediment Sampling Boom CuRM 250 RM2510 CRW17 (! *# (!*# As Pond CuRM 251 $$ As (! Pond E Nor Ral CUMBERLAND RIVER WATER QUALITY SAMPLING LOCATIONS Co 1 CV1 RM2410 Loop Landll Co 2 (!*# CV1W11RM2450(! CuRM 254 ¯ CuRM 241 (!*# *# Client/Project (! CuRM 245 ( CV1W10 Non-Rsrd CRS9 Mddl (!CV1W9 S (NRS) (!CRE4 FLOW (! CRS17 Tennessee Valley Authority Pond A (! (!CV2T2 CRW19 (! (! CuRM 253 Bull Run Fossil Plant CV2W7 *# CRW18! RM2440 ( RM2420 CV2W5 (! Boom (!*#CV2T1(!(! CuRM 244*# RM2510 CRW17 (! (!*# Project Location As Pond CuRM 251 (! 175566346CuRM Clinton, Tennessee Co 1 CV1 Prepared by TKR on 2018-08-31 242 CV1W11 (! CoTechnical 2 Review by TG on 2018-08-31 CuRM 254 (!CRS23 *# CV1W10 (! Non-Rsrd CuRM 252 CRE4 *# (!CV1W9 S (NRS) (! CRW2 0 1,400CRS17 (! 2,800 4,200 5,600 (! Surface Water Sample Locations (! (! CV2T2 Feet CuRM 253 CuRM 243 *# CV2W7 *# 1:16,800 (At original document size of 22x34) RM2440 RM2420 (! (!*#CV2T1(!(!CV2W5 CuRM 244*# Legend CuRM LEGEND 242 Figure 3-26 *# Rr Ml TVA Gallan Fossl Plan Propr SED-CR02 RM2480 (!CRS23 (! Sediment Sampling Transect Boundar (Approxma) *#CuRM 252 Ornal Nombr 2015 Sampln CRW2 DRAFT *# (! (! CuRM 248 Locaons CCR Manamn Uns WATER UALITY SAMPLING LOCATIONS CuRM 247 CCR Unit Area (Approximate) *#CuRM 243 CUMBERLAND RIVER *# (! Ponal Anomals Nor Ral Loop (NRL) Landll Former Disposal Area (Approximate) ³ DRAWN BY: REVIEWED BY: APPROVED BY: REVISION NUMBER: Suracar Sampln a Sdmn Slln Ponds (! MAR.P.SMITH SCHEIPC REV. 4 LEGEND Sampln Locaons CV3 0 2,500 5,000 Figure 3-26 GALLATIN FOSSIL PLANT (! *# Sluice Channel (Approximate) Rr Ml TVA Gallan Fossl Plan Propr F TENNESSEE VALLEY AUTHORITY Boundar (Approxma) DATE: DEPT: (! Ornal Nombr 2015 Sampln NOTE: ESRI Imar Src DRAFT 10/24/2017 FOSSIL AND HYDRO ENGINEERING Locaons CCR Manamn Uns WATER UALITY SAMPLING LOCATIONS Co 3 CUMBERLAND RIVER CRE1 (! Ponal Anomals Nor Ral Loop (NRL) Landll (! CuRM 249 ³ DRAWN BY: REVIEWED BY: APPROVED BY: REVISION NUMBER: Co 4 *# Suracar Sampln a Sdmn Slln Ponds (! MAR.P.SMITH SCHEIPC REV. 4 Sampln Locaons (!CV4 0 2,500 5,000 GALLATIN FOSSIL PLANT F TENNESSEE VALLEY AUTHORITY DATE: DEPT: NOTE: ESRI Imar Src 10/24/2017 FOSSIL AND HYDRO ENGINEERING RM240(! *#CuRM 246 (!RM2395 Slln CuRM 240 Pond B Bull Run Creek CuRM 239 *# (!RM2401 SED-CR03 *# SED-WB01

Slln CRS2 Pond D Slln RM2405(!(! Pond C As RM2407 (! Pond A SED-WB02 *#CuRM 250 As SED-CR04 SED-BRC01 Pond E Nor Ral r e v i R h c n i l C RM2410 Loop Landll Notes (!*# RM2450(! FLOW CuRM 241 *#CuRM 245 SED-BRC02 1. Coordinate System: NAD 1983 StatePlane Tennessee FIPS 4100 Feet CRS9 Mddl 2. Imagery Provided by ESRI Basemap (! Pond A CRW19 (! CRW18 SED-BRC03 (! Pickett Claiborne trink Boom : CRW17 (! RM2510(!*# As Pond Campbell By 31 CuRM 251 Fentress Scott

08 - (!

Co 1 Union Grainger 2018 - CV1 : CV1W11 (! Co 2 SED-CR05 CuRM 254 SED-BRC04 *# CV1W10 (! Non-Rsrd

Revised CV1W9 CRE4 Morgan (! S (NRS) (! Anderson CRS17 Jefferson (! (!CV2T2 Bull Run Fossil Plant li ng.mxd (! CuRM 253 ^_ Knox CV2W7 SED-CR06 *# Cumberland RM2440 Tennessee RM2420 CV2T1! CV2W5 CuRM 244*#(! (!*# ((! Sevier Roane Blount CuRM Loudon 242 Bledsoe Rhea ee ting\BRF_Sediment_Samp FLOW SED-CR07 (!CRS23 CRM 45 *#CuRM 252 CRW2 (! SED-CR08 *#CuRM 243 75 566346\gis\mxds\PublicM

Disclaimer: Stantec assumes no responsibility for data supplied in electronic format. The recipient accepts full responsibility for verifying the accuracy and completeness of the data. The recipient releases Stantec, its officers, employees, consultants and agents, from any and all claims arising in any way from the content or provision of the data. Page 01 of 01 U:\TVA-EIP\1 LEGEND Figure 3-26 *# Rr Ml TVA Gallan Fossl Plan Propr Boundar (Approxma) (! Ornal Nombr 2015 Sampln DRAFT Locaons CCR Manamn Uns WATER UALITY SAMPLING LOCATIONS CUMBERLAND RIVER (! Ponal Anomals Nor Ral Loop (NRL) Landll ³ DRAWN BY: REVIEWED BY: APPROVED BY: REVISION NUMBER: Suracar Sampln a Sdmn Slln Ponds (! MAR.P.SMITH SCHEIPC REV. 4 Sampln Locaons 0 2,500 5,000 GALLATIN FOSSIL PLANT

F TENNESSEE VALLEY AUTHORITY DATE: DEPT: NOTE: ESRI Imar Src 10/24/2017 FOSSIL AND HYDRO ENGINEERING GALLATIN FOSSIL PLANT

FISH BIOACCUMULATION SAMPLING

Fish Sampling Locations

Figure No. 1 DRAFT Title SED-CR01 ¯$$ Sediment Sampling ( Client/Project

FLOW Tennessee Valley Authority Bull Run Fossil Plant

Project Location 175566346 Clinton, Tennessee Prepared by TKR on 2018-08-31 Technical Review by TG on 2018-08-31

0 1,400 2,800 4,200 5,600 Feet 1:16,800 (At original document size of 22x34) Legend SED-CR02 Sediment Sampling Transect

CCR Unit Area (Approximate)

Former Disposal Area (Approximate) Electroshock Fishing Sluice Channel (Approximate)

SED-CR03 Bull Run Creek SED-WB01

SED-WB02

SED-CR04 SED-BRC01 r e v i R h c n i l C Notes FLOW SED-BRC02 1. Coordinate System: NAD 1983 StatePlane Tennessee FIPS 4100 Feet 2. Imagery Provided by ESRI Basemap

SED-BRC03 Pickett Claiborne trink :

Campbell

By 31 Fentress Scott 08 -

Union Grainger 2018 - : SED-CR05 SED-BRC04

Revised Morgan Anderson Jefferson Bull Run Fossil Plant li ng.mxd ^_ Knox SED-CR06 Cumberland Tennessee

Sevier Roane Blount Loudon

Bledsoe Rhea ee ting\BRF_Sediment_Samp FLOW SED-CR07 CRM 45

SED-CR08 75 566346\gis\mxds\PublicM

200 195

Stilling 190 SllnPond Pond B B

240 E 195

190 Ash As PondPond A A

Stilling Slln Pond D Pond D Stilling 195 SllnPond Pond C C

Ash AsPond Pond E E 195

North Rail 190 Nor Ral Loop Landll 241 Loop Landfill 245 E E

Middle

MddlPond Pond A A 190

195 190 Bottom

200 BoomAsh As Pond Pond

200

190

195 200

200

205 Non-RsrdNon-Registered Site (NRS) 200 S (NRS)

242 195 244 205 E E 190

200

200 195 GALLATIN FOSSIL PLANT 190

190

Figure No. 195 1 DRAFT Title SED-CR01 ¯$$ NEAR-BOTTOMSediment Sampling TEMPERATURE195 AND ( Client/Project E FLOW Tennessee Valley Authority 243 CONDUCTIVITYBull Run Fossil Plant

Project Location 175566346 Clinton, Tennessee Prepared by TKR on 2018-08-31 Technical Review by TG on 2018-08-31

0 1,400 2,800 4,200 5,600 Feet 1:16,800 (At original document size of 22x34)

LegendLEGEND ConductivityElcrcal Conduc (S/cm) SED-CR02 Figure 4-12 E RrSediment Ml Sampling Transect

CCR Unit Area (Approximate) Island 300 IN SITU CONDUCTIVITY SURVEY Former Disposal Area (Approximate) Cos 185 - 190190 - 200200 - 210210 - 220220 - 250250 - 300 RIVER MILE 240-24 LorSluice Chan Mannel (A Cannlpproximate) CCR Manamn ³ DRAWN BY: REVIEWED BY: APPROVED BY: REVISION NUMBER: Uppr Man Cannl Nor Ral Loop (NRL) MAR.P.SMITH SCHEIPC REV. 5 TVA Gallan Fossl Plan Propr GALLATIN FOSSIL PLANT Slln Ponds Boundar (Approxma) 0 1,500 3,000 TENNESSEE VALLEY AUTHORITY DATE: DEPT: NOTE: Aral ma dad Fbruar 2017 F 8/15/2017 FOSSIL AND HYDRO ENGINEERING

SED-CR03 Bull Run Creek 246 SED-WB01 E

200 195

Stilling 190 SED-WB02 SllnPond Pond B B

240 E 195 SED-CR04 SED-BRC01 r e v i R h c n i l C Notes 190 FLOW SED-BRC02 Ash 1. Coordinate System: NAD 1983 StatePlane Tennessee FIPS 4100 Feet As PondPond A A 2. Imagery Provided by ESRI Basemap

Stilling Slln Pond D Pond D SED-BRC03 Stilling Pickett 195 SllnPond Pond C C Claiborne trink :

Campbell

By 31 Fentress Scott 08 -

Union Grainger 2018 - : SED-CR05 SED-BRC04

Revised Morgan Anderson Jefferson Bull Run Fossil Plant

li ng.mxd Ash ^_ Knox SED-CR06 Cumberland AsPond Pond E E Tennessee 195

Sevier North Rail 190 Roane Nor Ral Loop Landll Blount Loop Landfill Loudon 241 245 Bledsoe Rhea E ee ting\BRF_Sediment_Samp FLOW SED-CR07 E CRM 45

Middle SED-CR08

MddlPond Pond A A 190 195 75 566346\gis\mxds\PublicM

U:\TVA-EIP\1 190 Bottom

200 BoomAsh As Pond Pond

200

190

195 200

200

205 Non-RsrdNon-Registered Site (NRS) 200 S (NRS)

242 195 244 205 E E 190

200

200 195

190

195 195

E 243

LEGEND ConductivityElcrcal Conduc (S/cm) Figure 4-12 E Rr Ml

Island 300 IN SITU CONDUCTIVITY SURVEY Cos 185 - 190190 - 200200 - 210210 - 220220 - 250250 - 300 RIVER MILE 240-24 Lor Man Cannl CCR Manamn ³ DRAWN BY: REVIEWED BY: APPROVED BY: REVISION NUMBER: Uppr Man Cannl Nor Ral Loop (NRL) MAR.P.SMITH SCHEIPC REV. 5 TVA Gallan Fossl Plan Propr GALLATIN FOSSIL PLANT Slln Ponds Boundar (Approxma) 0 1,500 3,000 TENNESSEE VALLEY AUTHORITY DATE: DEPT: NOTE: Aral ma dad Fbruar 2017 F 8/15/2017 FOSSIL AND HYDRO ENGINEERING GALLATIN FOSSIL PLANT

COMMUNITY ACTION GROUP

TVA is creating a Community Action Group (CAG) to help encourage dialogue and communicate the status and plans for activities at the Gallatin site.

Roles of Community Action Group

• Identify community concerns and share them with TVA

• Identify ways in which to communicate to the larger community about CAG efforts and activities

• Communicate opportunities for the public to provide comment and/or input

• Educate their community on how to find information that can answer questions and concerns on the safe management of coal combustion residuals (CCR)

Who can apply

Full-time residents of Sumner and Wilson Counties (must be age 18 years or older)

Terms and Membership

Each Community Action Group will consist of no more than 14 community members

One-year and two-year terms (randomly selected from membership)

Terms are staggered so that there is always a clear link to previous discussions and activities

Volunteer opportunity - compensation for service will not be provided. Certain out-of-pocket expenses can be reimbursed, if requested

Once assembled, the Community Action Group will decide where, when and how often they meet and how they will communicate. Local administrative support will be provided to assist their work GALLATIN FOSSIL PLANT SURFACE IMPOUNDMENT CLOSURE AND RESTORATION EIS

TVA is preparing an Environmental Impact Statement (EIS) to address potential environmental effects associated with several Project projects to facilitate long- Location Stilling term management of Pond B CCR. Office Complex/ Potential Beneficiation Site

Stilling Pond D Proposed Stilling Pond C

Potential Ash Pond A Beneficiation Alternatives Site

• Alternative A – No Action Alternative North Rail Loop Ash Pond E Landfill Ammonia Sensor • Alternative B – Tower Closure of All Surface CumberlandRiver

Middle Pond A Impoundments via Communication Tower Closure-by-Removal, the Potential Removal Landfill Expansion Bottom Area of De Minimis CCR Ash Pond from the Stilling Ponds, and Expansion of the Existing Onsite Landfill. Note that CCR could be removed to either an

on-site landfill or to a Legend EIS Project Area Ash Pond beneficial reuse facility. Landfill Complex Expansion Area Existing Landfill Office Complex/ (NRL) GAF Surface Potential Beneficiation Site Impoundment Closure Potential and Restoration Beneficiation Site Project EIS I Job No. 325219126 Date: 9/12/2019 1,000 0 1,000 Drawn By: BSM Feet Reviewed By: CJH K:\1_GIS\TVA_Gallatin\a_MXD\0_EIS\0_Public_Meeting\GAF_EIS_ProjectAreaActions_C_Size_190912.mxd

C STEAM PLANT ROAD

L E

F E R Y R O A D E

ODOMS BEND ROAD Stilling Pond B

Ash Pond A

Stilling Pond D Stilling Pond C

Ash GALLATIN FOSSIL PLANT Pond E Cumberland River/ North Rail Loop Landfill Old Hickory Lake

GALLATIN AGREEMENTS Middle Pond A

In June 2019, TVA entered into two agreements with TDEC to close the various units at GAF. Bottom Ash Pond Commissioner's Order - Non-Registered Site

• Impacts the Non-Registered Site and known groundwater impacts at the unit • TVA plans to conduct a treatability test to evaluate various reagents to adjust the groundwater pH to reduce the concentrations of target metals Non-Registered • A field demonstration will be performed with the most promising reagents to determine if the remediation Site (NRS) approach is effective at the unit • The Treatability Testing and Field Demonstration Plans will be submitted to TDEC for approval • The results of this study will inform the final closure of the unit

Treatability Test Complete Interim Reporting to TDEC: Implement Field Annual Interim Corrective Work Plan Treatability - Treatability Test Report Demonstration Reporting to TDEC Action Risk Testing and Field - Field Investigation Report and Monitoring Assessment Investigation - Field Demonstration Work Plan Plan (CARA) Plan - Monitoring Plan

LEGEND 1 YEAR Cumberland River Flow Direction TVA Gallatin Fossil Plant Property 5 YEARS Boundary (Approximate) CCR Management Units North Rail Loop (NRL) Landfill ³ DRAWN BY: REVIEWED BY: APPROVED BY: REVISION NUMBER:

Stilling Ponds 0 1,200 2,400

Feet DATE: DEPT: NOTE: Aerial image dated February 2017 GALLATIN FOSSIL PLANT

GALLATIN AGREEMENTS

C STEAM PLANT ROAD

L E

F E R Y R O A D E

A In June 2019, TVA entered into two agreements with TDEC to close the various units at GAF. L

E Consent Order - Ash Ponds N

• Impacts the Bottom Ash Pond, Ash Pond A, Ash Pond E, Middle Pond A, and Stilling Ponds ODOMS BEND ROAD Stilling Pond B • TVA will excavate and remove CCR from the units and store in a lined landfill and/or process the material for

beneficial reuse Ash Pond A • The NEPA process is underway to address any potential environmental impacts of the Stilling Pond D Stilling closure-by-removal activities and final disposition of CCR Pond C

Ash Pond E

Cumberland River/ North Rail Loop Landfill Old Hickory Lake

Middle Environmental Impact Required Plans: Implement Ash Annual Interim Pond A Study (EIS) - Removal Plan Pond CCR Removal Reporting to TDEC - Monitoring Plan and Groundwater Environmental Assessment - Groundwater Corrective Action Corrective Actions Report (EAR) Bottom Risk Assessment (CARA) Plan Ash Pond

1 TO 2 YEARS

20 YEARS Non-Registered Site (NRS)

Stilling Ponds 0 1,200 2,400

Feet DATE: DEPT: NOTE: Aerial image dated February 2017 GALLATIN FOSSIL PLANT SUPPLEMENTAL ENVIRONMENTAL ASSESSMENT

Gallatin Fossil Plant Bottom Ash Dewatering Facility Permanent Flow Management System

TVA is preparing a Supplemental Environmental Assessment (SEA) to address the potential environmental effects associated with a permanent flow management system to treat process wastewater at the Gallatin Fossil Plant (GAF). The SEA supplements an Environmental Assessment (EA) and subsequent Finding of No Significant Impact (FONSI) that TVA issued in 2017, which evaluated a bottom ash dewatering (BADW) system that is currently under construction. Proposed Alternatives

• Alternative A – No Action • Alternative B – Closure of the Bottom Ash Pond, Construction of Process Water Basin(s) and Permanent Flow Management System TVA’s preferred alternative is Alternative A, under which permanent modifications would be made to the interim flow management system and it would continue to treat process water flows from GAF until the BADW system becomes operational. Under Alternative A, the Bottom Ash Pond would not be closed for the purpose of constructing the process water basin(s) and the process water basin(s) would not be constructed. Public Comment

TVA will accept comments on the Draft SEA that it receives no later than October 9, 2019. Any comments received, including names and addresses, will become part of the administrative record and will be available for public inspection.

Comments can be submitted online or emailed to [email protected]

Comments can also be mailed to: Tennessee Valley Authority ATTN: Ashley Farless, GAF BADW SEA 1101 Market St., BR2C-C Chattanooga, TN 37402 GALLATIN FOSSIL PLANT

LEGACY CCR AREAS

Non-Registered Site 65 acres 2.3 Million CYs NRS begins NRS stops receiving receiving NRS Closed CCR CCR

1956 1970 1998 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 2030 2035 2040 Non-Registered Site

Ash Ponds 390 acres 11.5 Million CYs

APC begins APC stops APC receiving receiving Closure CCR CCR Complete

1970 2019 ≈2040 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 2030 2035 2040 Ash Ponds GALLATIN FOSSIL PLANT

ENVIRONMENTAL STEWARDSHIP

Air Quality Improvements • • South Rail Loop Lateral Expansion (Preferred Alternative) • • • 2 • • •

Low NOx & Scrubber SCR SOFA in-service in-service in-service

1995 2016-17 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 2030 2035 2040 Air Quality Improvements

North Rail Loop Landfill State-of-the-art Lined, Landfill

NRL Landfill in-service

2016 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 2030 2035 2040 North Rail Loop Landfill GALLATIN FOSSIL PLANT

ENVIRONMENTAL STEWARDSHIP

Flow Management System • $46M investment • In service June 2019 • No more CCR solids or flows to Ash Ponds • Temporary Bottom Ash Dewatering • Water treatment Flow Management in-service

2019 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 2030 2035 2040 Plant Process Water Treatment

• • •

BADW In-service

2019 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 2030 2035 2040 Bottom Ash Dewatering