Update on Kingston Ash Spill - TVA - Home Content/About TVA/Our Public... · Update on Kingston Ash...
Transcript of Update on Kingston Ash Spill - TVA - Home Content/About TVA/Our Public... · Update on Kingston Ash...
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Update onUpdate onKingston Ash SpillKingston Ash Spill
Anda RaySenior Vice President
Office of Environment & Research
JULY 2009
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History of Kingston Fossil PlantHistory of Kingston Fossil Plant
• TVA part of Kingston community since early 1950s– Construction of plant began in 1951
– First unit began operation in 1955
• At time of completion, world’s largest coal-burning plant
• About 300 people work there
• Has nine generating units with
a capacity of 1600MW
• Burns 14,000 tons of low-sulfurcoal daily with nine units~1,000 tons of ash produced daily
• Produces enough electricity to serve 700,000 homes
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History of Failed Dredge CellHistory of Failed Dredge Cell
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Failure of Dredge CellFailure of Dredge Cell
Dike Failed on December 22, 2008, between midnight & 1 a.m.
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AECOM June 2009 Root Cause Report
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What Happened What Happened –– Initial FailureInitial Failure
Initial effects– 5.4 million cubic yards of coal ash released – Debris covers about 300 acres (about half a square mile)– No injuries– 3 homes uninhabitable, 23 others damaged– Roads, rail line and utilities damaged
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Aerial View of Site – Post Event
Failed Dike
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Initial Emergency ResponseInitial Emergency Response
• Worked closely with:– Roane County Emergency Management Agency– Tennessee Department of Environment & Conservation (TDEC)– Tennessee Emergency Management Agency (TEMA)– U.S. Environmental Protection Agency (EPA)– U.S. Army Corps of Engineers– U.S. Department of Homeland Security
• Established unified incident command center with EPA, state and local agencies
• Inspected site to verify no further releases
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Initial Outreach ResponseInitial Outreach Response
• Ensure neighbors are safe
• Arrange temporary housing + incidentals
• Respond to property damage
• Dispatch face-to-face outreach teams
• Conduct community meetings
• Establish comprehensive Web site to share information
• Established an Outreach Centerand public phone line
• Established a Claims process
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Kingston Recovery ObjectivesKingston Recovery Objectives
Kingston Recovery Project Objectives
• Ensure the Safety of Citizens and Response Personnel
• Keep the Public and Stakeholders Informed of Response Activities
• Maximize the Protection of Environmentally Sensitive Areas
• Return Community to Normal Conditions
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Early Environmental MonitoringEarly Environmental Monitoring
• Began ongoing sampling of air, water & soil
• Stabilized site to prevent further movement of ash– Deployed booms to confine floating debris and cenospheres– Began building dikes to confine ash in the water– Began dust control measures with spray-on dust inhibitors and
applying straw & seeding
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Scope of CleanupScope of Cleanup
Failed Ash Cell
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Failed Cell and Former Dike Area
Scope of CleanupScope of Cleanup
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Scope of CleanupScope of Cleanup
Aerial of Spill -BEFORE
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CERCLA
• TVA and EPA have decided to conduct remediation of the KIF Ash Release under the regulatory structure of CERCLA, the Comprehensive Environmental Response, Compensation & Liability Act
• CERCLA provides TVA, regulators, and the public with a clear path forward to clean up the site. Advantages include:– Structured approach for making environmental remediation decisions– Structured approach for community involvement– Provides a clear set of worker health and safety requirements– Meets Federal and State requirements; allows TVA to meet non-statute
requirements that may be more stringent
• TVA and EPA signed an Order May 11, 2009 that dictates roles andresponsibilities of each party.
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Scope of CleanupScope of Cleanup
Amphibious trackhoes
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Cenospheres CleanupCenospheres Cleanup
Collecting cenospheres …
… and storing them
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Ash ProcessingAsh Processing
River DredgeSettling Pond
Discharge into Rim Ditch
Dipping Ash Sluice Channel Rail LoadingTemp Processing Area
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River Dredging
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Pumping Into Rim Ditch
Dredge Material Pumped Into Rim Ditch
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Dipping Ash From Rim Ditch
Dredge Material Dipped by Back Hoes from Rim Ditch to Processing Area
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Loading Rail Cars
Dried Ash Loaded Into Rail Cars
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Ash Disposal
Rail Car Burrito Liner
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Ash Disposal
Disposal of Released Ash:• Current Transportation: Rail • Other: Barge, Truck• Alabama site
Long Term Options:• Dry Fly Ash Collection• By Product Marketing• Reclamation Sites• Existing Class I or II Landfills• Greenfield Disposal Sites• Brownfield Sites - Structural Fill
Class I landfill in Alabama, EPA Certified
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Soil & Ash SamplingSoil & Ash Sampling
• Except for arsenic, concentrations of metals in escaped ash are well below EPA Region 4 Removal Action Levels– In most cases, not much different from
non-agricultural soils
• Ash and soil tested for radioactivity– Kingston ash less
radioactive than low-sodium table salt
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Water & Air Sampling ResultsWater & Air Sampling Results
• Well over 2,000 tests by TVA, TDEC & EPA continue to confirm– Municipal drinking water & water sampled from
private wells continue to meet standards for drinking water
• More than 64,000 of air-quality results show the air is better than National Ambient Air Quality Standard for particulates
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Biological MonitoringBiological Monitoring
• Fish (whole body and tissue)• Benthic invertebrates (bottom of food chain)• Birds and eggs (food chain effects)• Insects (food source)• Aquatic Life Toxicity
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Operational Results
• 357,499 yds3 of ash removed from the river to date• 360+ acres of Flexterra applied• 6,145,500 gallons of Cenosphere slurry collected• 67,963 bags of shoreline debris collected• 959 tons of light debris collected w/ barge-mounted
excavators• 64,000+ air samples• 1,800+ river water samples• 8 miles of road rebuilt or repaved
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Continued Outreach
• Public Meetings• Outreach Center• Long-term Recovery Committee• Property Purchases• Business Claims• Community Involvement Plan• ORAU Health Contract• Research RFPs Peer Reviewed• Community Action Group
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Progress…
Failed Dredge Cell from Swan Pond Road
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Tracks adjacent to Swan Pond Road - BEFORE
Before…
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BeforeBefore……
Tracks and Swan Pond Road - BEFORE
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ProgressProgress……
Tracks and Swan Pond Road - AFTER
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BeforeBefore……
Connector Swan Pond Road and Circle - BEFORE
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Connector Swan Pond Road and Circle - AFTER
Progress…
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BeforeBefore……
Church Slough -BEFORE
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Church Slough -TODAY
ProgressProgress……HOPE!HOPE!
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Questions?