ryerson creek outfall great lakes legacy act project · u.s. environmental protection agency great...
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U.S. Environmental Protection Agency Great Lakes National Program Office
Ryerson Creek Outfall Great Lakes Legacy Act Project: Feasibility Study technical discussion of alternatives and clean-up goals
Mark LoomisProject ManagerUnited States Environmental Protection AgencyGreat Lakes National Program Office
5/7/2019
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U.S. Environmental Protection Agency Great Lakes National Program Office
Agenda
Objective: Discuss Feasibility Study progress and next steps for Remedial Design and Remedial Action
•Project update
•Sampling efforts to-date
•Developing clean-up goals
•Determining project area
•Screening of remedial alternatives
•Cost
•Schedule
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U.S. Environmental Protection Agency Great Lakes National Program Office
Feasibility Study Update• EPA, EGLE (MDEQ), and TDY Industries signed a Great Lakes Legacy Act
Project Agreement on February 11, 2019 to conduct an FS/RD.
• Project Team identified data gaps and has conducted sampling (April 2019), but awaiting results.
• A clean-up goal analysis has begun.
• Remedial Design will occur through summer.
• Remedial Action targeted for late 2020.
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U.S. Environmental Protection Agency Great Lakes National Program Office
Chemicals of Concern
• Total Petroleum Hydrocarbons (TPH)
– Diesel Range Organics (DRO)
– Oil Range Organics (ORO)
• Oil and Grease
• Metals
– As, Ba, Cd, Cr, Cu, Pb, Hg, Se, Si, Zn
• Polycyclic Aromatic Hydrocarbons (PAHs)
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U.S. Environmental Protection Agency Great Lakes National Program Office
Ryerson Creek Update
• 1994 - Site was identified as one of the priority orphan sites to be evaluated for sediment contamination.
• Sampling– 2005/2006
– 2012
– 2015
– 2019
• Remediation of the Ryerson Creek Site is the last contaminated site to be addressed to delist the Area of Concern (AOC)
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U.S. Environmental Protection Agency Great Lakes National Program Office
Ryerson Creek Outfall
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U.S. Environmental Protection Agency Great Lakes National Program Office
Previous Sample Locations 2005 - Creek
2012 – Zone 1
2012 – Zone 2
2012 – Zone 2 surface grabs
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U.S. Environmental Protection Agency Great Lakes National Program Office
Updated Sample Locations
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U.S. Environmental Protection Agency Great Lakes National Program Office
Sampling Results• Petroleum Hydrocarbons (TPH): Diesel Range Organics (DRO), Oil Range
Organics (ORO), and Oil and Grease (OG) are the most pervasive contaminants at exceedingly high-levels.
• Polycyclic Aromatic Hydrocarbons (PAHs) are present at high-levels but do not show up in all parts of the project area.
• Heavy metals (Pb, Cr, Cd, Hg) co-locate with the extent of TPH but do not show up in all parts of the project area.
• TPH and Oil and Grease are being used as the main COC for Clean-up Goal development.
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U.S. Environmental Protection Agency Great Lakes National Program Office
Clean-Up Goals: Petroleum and Oil and Grease
Approach: Multiple lines of evidence
Consider adjacent deep water data as a background for “non-impacted” sediment concentrations.
Examine previous thresholds of other GLLA projects.
Evaluate data using previously published methods to calculate probable toxic ranges.
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U.S. Environmental Protection Agency Great Lakes National Program Office
Project Decision Areas• The site was divided into surface (0-12”) and sub-surface (>12”) depths to
describe contamination levels.
• The site was also divided into “units” which are our decision areas
• Boundaries (horizontal and vertical) for these decision areas will be refined based on the recent 2019 data.
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U.S. Environmental Protection Agency Great Lakes National Program Office
Anticipated Remedial Action Areas
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U.S. Environmental Protection Agency Great Lakes National Program Office
Screening Alternatives
• Technical Feasibility
• Implementability
• Long-term effectiveness in reducing risk to benthic communities
• Short-term impacts
• Long-term impacts
• Relative Cost
• Public Acceptance
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U.S. Environmental Protection Agency Great Lakes National Program Office
Alternative Array
No Action
Shallow Removal + Cover
Deep Removal + Cover
Deep Removal + Shallow Removal + Cover
Deep Removal + Cover
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U.S. Environmental Protection Agency Great Lakes National Program Office
Cost
• Amended project agreement to include remedial action
• Total Cost ~$5.5 M– Federal Match $3.6 M– Non-Federal $1.9 M
• Non-Federal Contributions– TDY Industries LLC. $550k (consulting services)– MDEQ up to $1 M (1:1 of other NFS contributions)– County Landfill and Wastewater Treatment Plant
~$350k
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U.S. Environmental Protection Agency Great Lakes National Program Office
Schedule
May June July Aug Sept Oct Nov Dec Jan Feb Mar Apr May June July Aug Sept
Feasability Study
60% 80%
Project Agreement App
Contracting
Remedial Action
Phase
Remedial Design100%
Remedial Action
2019 2020
Feasibility Study
Remedial Design
Signed PA by 9/15
Solicitation Contract Award
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U.S. Environmental Protection Agency Great Lakes National Program Office
www.GreatLakesMud.org
Mark LoomisFederal Taskforce Lead
U.S. EPA Great Lakes National Program Office