2019 annual meeting ashland superfund site€¦ · superfund project superfund program - started...
TRANSCRIPT
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2019
Annual Meeting
Ashland Superfund Site
Brian Hinrichs, Client Team Leader
Foth Infrastructure & Environment
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Site Location
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Project Team
Baird.
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Ashland Gas Works History
62 Years of Gas Production
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Superfund Project
◆ Superfund Program - started 1980
◆Ashland Superfund Record of Decision (ROD) issued September, 2010.
◆The ROD explained which cleanup alternatives to be used at the site.
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2013-14 2015
On-ShoreSoil Cleanup
Wet DredgePilot Project
Hydraulic Dredge
Sediment Removal
2016 2017 2018
BreakwaterBuild
MechanicalDredge
SedimentRemoval
2010
Record ofDecision
(ROD) Issued
Final Kreher Park Restoration –
Return to Community for Redevelopment
2019
Project Cost
Project Timeline
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Summary of Work
❖ Design/Build Project
Building Demolitions, Slurry Wall,
Bulkhead Wall,
Soil Excavation, Soil Treatment
Groundwater Extraction
Water Treatment Plant
Contaminated Sediment Cleanup
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Multi-Year - Two Phases
Phase 1Phase 2
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Ashland/NSP Lakefront
Superfund Site
Phase 2
Phase 1
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Phase 1 Source Control
❖Excavation: 90,000 tons
❖Thermal Desorption: 70,000 tons
❖Offsite Disposal: 20,000 tons
❖Met All Soil Cleanup Standards
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Soil Excavation and
Treatment
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❖Primary Purpose Wave Barrier for 2016 Pilot Project
Full-Scale Sediment Remedy Benefits
Community Benefits
Phase 2 Breakwater
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Breakwater Construction
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Phase 2 Pilot Project
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Pilot Project Work
❖ 40,000 square foot Pilot Study Dredge Area
❖ 8,000 cubic yards Removed
❖ 520 Truckloads to Sub-Title D Landfill
❖ 4 million gallons Water Treated
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Pilot Project Successful!
Move to Full Scale
Phase 2 Dredging
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Extensive Monitoring
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Water Quality Results
• Over 10,000 samples analyzed
• >99.9% meet water quality standards
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Enhanced Technologies
Multiple Barrier Curtain
System
to contain work area
impacts and protect Lake
Superior
Vapor Phase Odor
Control System
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Sediment Pre-Project
SWAC = 409 ppm
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Sediment Post Dredging
Meeting SWAC Performance Standard
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tPAH Mass Removal
Summary
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Restorative Layer
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Ashland Kreher Park
- draft conceptual plan
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