SLIDE 1
Stormwater Infiltration Concerns on Brownfields
Rebecca A. Bourdon, PG Hydrogeologist Remediation Division 9.13.12
Stormwater Infiltration
Concept
MEETS
Stormwater Infiltration Concerns on Brownfields Rebecca A. Bourdon, - - PowerPoint PPT Presentation
Stormwater Infiltration Concerns on Brownfields Rebecca A. Bourdon, - - PowerPoint PPT Presentation
Stormwater Infiltration Concerns on Brownfields Rebecca A. Bourdon, PG Hydrogeologist Remediation Division 9.13.12 Stormwater Infiltration Concept MEETS Brownfields Programs Assurances: Expedited Review, No Further Action, Response
SLIDE 2
SLIDE 3
Brownfields Programs
- Assurances:
- Expedited Review, No Further Action, Response Action Plan Approval, etc.
- Developer Liability
- Snapshot-in-Time plus Development Plan
SLIDE 4
Contaminant Distribution:
- Snapshot in Time
- Closure Based on Current Use
- Response Actions for Risks
SLIDE 5
PBP/VIC
Current Procedures:
- Process/evaluate on a site-
specific basis
- Dependent on
communication between consulting engineers, environmental professionals and regulatory body
- Information gaps easily occur
SLIDE 6
PBP/VIC
Future Procedures:
- EPA guidance and PBP/VIC-specific guidance language
will shape future requirements
- Design options – BMPs, design for spatial occurrence,
information gathering, additional investigation
SLIDE 7
Information Needs
Existing COC occurrence Site Conceptual Model Upgradient and downgradient sites Existing COCs Life of Stormwater System Design capacity O&M Life cycle costs per COC presence or mitigation Hydrologic Alterations Modeling Mounding Karst/Conduit flow Improving natural attenuation conditions
SLIDE 8
- Plan for stormwater
infiltration information needs with contamination investigation work (Phase I)
- Communicate in design
phase, reporting phase and implementation phase
- Anticipate questions
Contact: PBP – Rebecca Bourdon 651.757.2240 rebecca.bourdon@state.mn.us VIC – Lynn Grigor 651.757.2399 lynn.grigor@state.mn.us