former spellman engineering site
DESCRIPTION
Project Update Meeting March 18, 2008 William C. Denman, P.E. Remedial Project Manager [email protected] (404) 562-8939. Former Spellman Engineering Site. Former Spellman Engineering Background - Location. Release Location. Background – RI/FS Extent of Ground Water Contamination. - PowerPoint PPT PresentationTRANSCRIPT
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Former Spellman Engineering Site
Project Update MeetingMarch 18, 2008
William C. Denman, P.E.
Remedial Project Manager
(404) 562-8939
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Former Spellman EngineeringBackground - Location
Release Location
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Background – RI/FSExtent of Ground Water Contamination
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Conceptual Site Model
Vertical Distribution of TCE
Contamination in Ground Water
BackgroundRI/FS (cont.)
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Background - RI/FS (cont.)Key Findings
No actual human exposure to contaminated ground water is occurring
The ground water plume underlies approximately 40-acres
Migration to the Floridan aquifer potentially threatens nearby municipal supply wells
Contamination can be addressed through an engineered remedy
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Cleanup ApproachSource and Highly Impacted Areas
Surfactant enhanced in situ chemical oxidation (ISCO) of source area (TCE concentrations >100,000 ug/L, darkest area on map)
ISCO of highly impacted zone (TCE concentrations between 10,000 and 100,000 ug/L, adjacent to darkest area on map)
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Cleanup ApproachDilute Ground Water Plume
Enhanced in situ bioremediation of groundwater with TCE concentrations >2,000 ug/L
Partial enhanced in situ bioremediation of groundwater with TCE concentrations >300 ug/L
ISCO (TCE >10,000 ug/L)
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Cleanup ApproachPost-Active Treatment
Natural attenuation monitoring until cleanup goals are met»TCE: 3 ug/L»DCE: 70 ug/L»VC: 1 ug/L
Five-year reviews of remedy until cleanup goals are met
Attains Unrestricted Use/Unlimited Exposure Criteria
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Former Spellman EngineeringRemedial Design/Remedial Action
ROD signed September 23, 2004Remedial Design
»Start in October 2004»Treatability Studies to refine remedial
technologiesRemedial Action - Funding Options
»NPL Listing and Superfund financing based on site prioritization (risk-based)
»Third-party cleanup
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Remedial Action Funding
City of Orlando and the local community indicated a strong preference for third-party cleanup using a property divestiture, cleanup, and redevelopment approach.»Keep properties off the National Priorities List»Expected to reach cleanup faster
EPA supported this approach.»Superfund Redevelopment Initiative»2002 Amendments to CERCLA
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• Region 4 - Bona Fide Prospective Purchaser Agreement (BFPP)
– Prospective Purchaser to Perform Cleanup under
EPA oversight.
– Release of any EPA Liens
• FDEP - Brownfield Site Rehabilitation Agreement (BSRA)– Cleanup Liability Protection– Lender Liability Protection– Voluntary Cleanup Tax Credit (VCTC)
• Deduct up to $500,000 per year• 25% bonus for Site Rehabilitation Completion• Credits are transferable
Lake Highland Cleanup Program Elements
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CLEANUP REDEVELOPMENT
BFPP AGREEMENT PURCHASE & SALE AGREEMENT
Private Partner
ARCADIS
CLEANED UP SITE & REDEVELOPED PROPERTY
Property Development
Site Cleanup
City of Orlando
Record of
Decision
BSRA
Public/Private Partnership
EPASuperfund
FDEPFL Brownfields