Tennessee Valley Authority · NYSE:TVC
Tennessee Valley Authority — Corporate Update (September 2010)
22 slides from Tennessee Valley Authority's corporate update, Sep 23, 2010
Slide 1: TVA Kingston Fossil Fuel Plant Release Site Non-Time Critical Removal Update
TVA Kingston Fossil Fuel Plant Release Site Non‐Time Critical Removal Update September 23, 2010
Slide 2: Removal Action Areas
Removal Action Areas Time Critical Approx 3.5 Million CYS Up to ERM 6.0 Non‐Time Critical 2.8 Million CYS Down to confluence of Emory and Clinch
Slide 3: Transition Activities
Transition Activities • North Embayment ash consolidation • Swan Pond Cir. bridge, underpass, haul road • Dredge cell contouring
Slide 4: On-site Ash Numbers
On‐site Ash Numbers • 2.8 million cys 2.8 million cys – North Embayment – Middle Embayment 4.0 million cys • 10.8 million cys – Dredge Cell • 4.0 million cys – Ash Pond – Lateral Expansion • 17.6 million cys total on‐site disposal 10.8 million cys
Slide 5: Current Activities
Current Activities EMBAYMENT RESTORATION Construct Underpass Excavate Ash - North Embayment Remove Clean Water Ditch - North Embayment Excavate Ash - Middle Embayment (Final) Dredge Middle Embayment FAILED DREDGE CELL Stack Ash - Central Dredge Cell (Cell 3) Stack Ash -North Dredge Cell (Cell 2) Clo
Slide 6: What's Happening Now?
What’s Happening Now? • Continue to build infrastructure – 78% complete – Underpass and bridge construction on‐going – Bridge scheduled to open Oct. 18 – Haul road complete
Slide 7: What's Happening Now?
What’s Happening Now? • North Embayment ash consolidation – 89% complete – Scraping ash away from natural water springs – Consolidating ash until underpass is complete
Slide 8: What's Happening Now?
What’s Happening Now? • Perimeter Containment – Deep soil mixing pilot study complete – 11 columns constructed – Column borings collected for testing – Report is pending
Slide 9: What's Happening Now?
What’s Happening Now? • Central Area contouring – 29% complete – Middle Embayment ash being removed and used to contour Central Area – Relic area and test embankment height removed down to final elevation
Slide 10: Contouring
Contouring • Central Area – Middle Embayment • Reducing height – Test Embankment – Relic Area
Slide 11: EE/CA Sampling
EE/CA Sampling • Sediment Sampling – Embayments – River sediment • Water Monitoring – 8 week SAP river sampling – Groundwater sampling • Biological Sampling – Frogs, fish, birds, benthic bugs, turtles, raccoons
Slide 12: Biological Uptake
f Recreational { SEASONALLY EXPOSED ip SEDIMENT/ASH ‘ect Contact with Surtoce Water and Seasonally Exposed Sediment Ingertion of fish and Aequat: Bota CAPPED OREOGE CELL Ingestion of Fishy
Slide 13: New Work Plans
New Work Plans • Non‐Time Critical Removal Action Work Plan • Revised Community Involvement Plan (final) • Surface Water Monitoring Plan • Air Monitoring Plan – Continuous air monitors (BAMs)
Slide 14: Air Monitoring
Air Monitoring • Real‐time air monitors (5 stations) – 2 TEOMs (PM 2.5 & 10) – 5 BAMs (PM 2.5) – 1 FRM (PM 2.5)
Slide 15: Surface Water Monitoring
Surface Water Monitoring • 3 on‐site locations sampled 1/week • ISCO automated Emory River samplers (rain events) – 3 locations on Emory River – 2 locations on Clinch River – 1 location on‐site (clean water ditch) Clinch River
Slide 16: Leachability Testing
Leachability Testing • 70% complete • Evaluating leaching behavior of ash using site‐specific conditions • Using ash, lime‐treated ash, and cement‐ treated ash • Support groundwater transport modeling
Slide 17: New Well Installations
New Well Installations • Proposed wells: – 6 existing – 3 permanent – 7 temporary – 16 boreholes • Installed wells: – 3 permanent – 2 temporary – 0 boreholes
Slide 18: Instrumentation
Instrumentation • Installing in central and north dredge cell area – 50% complete – 18 piezometers (pore pressure) – 9 slope inclinometers (vertical movement) – 5 settlement plates (vertical movement)
Slide 19: Upcoming Activities
Upcoming Activities EMBAYMENT RESTORATION Construct Underpass Excavate Ash - Middle Embayment (Initial) | Excavate Ash - North Embayment Remove Clean Water Ditch - North Embayment Restore Ecosystem - North Embayment Excavate Ash - Middle Embayment (Final) Remove Clean Water Ditch - Middle Embayment
Slide 20: Next Steps
Next Steps • Construction of perimeter containment – Working platform – Deep soil mixing columns
Slide 21: Next Steps
Next Steps • Stacking and compacting ash in dredge cell – Preparation of subgrade to capillary break elevation – Start in central contoured area (Cell 3) – Next area is north near east‐ west haul road (Cell 2)
Slide 22: Next Steps
Next Steps • Hauling ash – From North Embayment and Middle Embayment – Use underpass for North Embayment ash hauling
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