ASTSWMO Brownfields and Superfund...
Transcript of ASTSWMO Brownfields and Superfund...
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ASTSWMO Brownfields and
Superfund Symposium August 20-22, 2018
Jacksonville FL
#BFSSymp
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Preparing for Post
Construction - Using Lessons
Learned to Minimize Long
Term Monitoring CostsModerator: Jeff Steers (VA), ASTSWMO CERCLA Post Construction Focus Group Chair
#BFSSymp
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Review of Lessons Learned from
Adaptive Practices
CERCLA Post Construction Focus Group reviewed
adaptive management-type practices that have
been used by PMs to respond to changing
conditions and new site information.
Determined the most direct path to closure often
requires re-evaluation of course of action
specified in original ROD requirements.
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Who’s Who and What’s the Plan?Moderator:
• Jeff Steers, VA DEQ,
ASTSWMO CPC Focus Group Chair
EPA Region 7 and Nebraska will co-present a case study
on the Cleburn NPL site.
Speakers:
• Lynn Juett, EPA Region 7
• Tom Buell, NE DEQ
Wisconsin will present Penta Wood NPL site Case study
Speaker:
• Judy Fassbender, WI DNR
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Step 1: Develop Site List
Graphic – Map showing sites and indication of total number of Superfund Sites in the US
Open and closed?
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Step 1: Develop Site List
EPA Database Query
Fund Lead sites
Sites with ROD Amendments and ESDs
Past 15 years
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View of EPAs spreadsheet
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Step 1: Develop Site List
Graphic – Bar chart of # of EPA provided list sites by region
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Step 2: Refine List
The ASTSWMO CPC Focus Group reviewed the list of
Fund lead sites and added a few Potentially Responsible
Party financed LTRA sites that have gone through:
• ROD amendments
• Explanation of Significant Differences
• And Optimization
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Step 3: Review Sites on List
The ASTSWMO CPC Focus Group conducted an
evaluation the LTRA sites
Goal was to identify efficient and effective
adaptive-type O&M management practices.
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Step 3: Review Sites on List
Informal review of sites on list completed by Focus Group
members
Goal was to identify efficient and effective adaptive O&M
management practices.
Showcase how to better respond to changing conditions
while ensuring protectiveness of human health and the
environment.
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Step 3: Review Sites on List
How many sites reviewed total
Sites reviewed - breakdown by region
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Step 4: Identify Triggers
7 trigger categories identified that resulted in ROD Amendment,
ESD or change in remedy to meet ROD requirements
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Common Triggers - Overview
Basic “Speed Bump” Categories along Closure Path
1. Incomplete Site Investigation
2. Removal action/IROD
3. Emerging contamination
4. Other Pathway
5. Technology
6. Optimization
7. Other
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1. Incomplete Site Investigation
May include
Incomplete characterization
Incomplete pathway identification
Two subcategories
a. Physical controls
Structural impediments
deeper contaminant plume
additional media impacted not previously known
b. Risk driver – expedites process
Rush to protect drinking water
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Trigger 2. Removal Action/IROD
Completion of a Removal action or imposition of an
interim ROD
Reduces or eliminates risk
Removes priority for action
Short circuits full site investigation
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Trigger 3. Emerging Contaminants
Common Contaminants –
PFAS
1,4-dioxane
Lead
Arsenic (new Tox studies)
Hexavalent vs Dissolved Chromium
Perchlorate
pharmaceuticals
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Trigger 4. Pathway
Migration and exposure pathways added
Vapor intrusion
Sediment
Surface water
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Trigger 5. Technology
Applicability of Technology (appropriateness)
Better understanding of technology
Reassess presumptive remedy
Availability of better technology
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Trigger 6. Optimization
Optimization
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Trigger 7. Other
Other
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C. Graphical representation of issue and solution - NARPM Circle –Process improvement diagram
a Venn diagram or EPA’s graphic
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Findings
Insert Graphs
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Placeholder
“Speed Bump” Summary
1. Incomplete SI
2. Removal action/IROD
3. Emerging contamination
4. Other Pathway
5. Technology
6. Optimization
7. Other 0
1
2
3
4
5
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Category 1 Category 2 Category 3 Category 4
Chart Title
Series 1 Series 2 Series 3
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Continuous Evaluation
Protective
Effective - Evaluate active remedies (and not active remedies)
Cost Control
Efficient
Green and Sustainable
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Catalyst for Further Assessment
Financial drivers
Responsibility transfer
Technology changes – delays in funding
Delayed funding of different aspects of the project
Settlement funds
Cleanup targets not met in a reasonable timeframe
Impacted receptors
Unusual/unsuccessful performance of a remedy –unknown/additional impacts
Optimization review – Year 7 of LTRA
Five Year Reviews
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Site Categories
Two categories of Sites
1. Legacy sites – use experience to learn what actions support success
2. Newer sites going through the RI/FS and RD/RA process – Apply successful actions learned from Legacy sites
(in line EPAs continuous adaptive mgmt.)
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Add EPA Adaptive Management overview
This is a part of EPAs
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Summary
• Summarize how many sites were looked at and how many fell into which category – Review sites from several regions and provide data summary information based on the excel spreadsheet composites.
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Recommendation
Ensure State ARARs are written
into the ROD
Recommend language in the
SSC that would allow state to
negotiate within the process