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Former Spellman Engineering Site

Project Update Meeting March 18, 2008 William C. Denman, P.E. Remedial Project Manager Denman.Bill@epa.gov (404) 562-8939. Former Spellman Engineering Site. Former Spellman Engineering Background - Location. Release Location. Background – RI/FS Extent of Ground Water Contamination.

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Former Spellman Engineering Site

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  1. Project Update Meeting March 18, 2008 William C. Denman, P.E. Remedial Project Manager Denman.Bill@epa.gov (404) 562-8939 Former Spellman Engineering Site

  2. Former Spellman EngineeringBackground - Location Release Location

  3. Background – RI/FSExtent of Ground Water Contamination

  4. Background RI/FS (cont.) Conceptual Site Model Vertical Distribution of TCE Contamination in Ground Water

  5. 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

  6. 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)

  7. 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)

  8. 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

  9. Former Spellman EngineeringRemedial Design/Remedial Action • ROD signed September 23, 2004 • Remedial Design • Start in October 2004 • Treatability Studies to refine remedial technologies • Remedial Action - Funding Options • NPL Listing and Superfund financing based on site prioritization (risk-based) • Third-party cleanup

  10. 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

  11. Lake Highland Cleanup Program Elements • 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

  12. Private Partner Property Development Site Cleanup CLEANUP REDEVELOPMENT BFPP AGREEMENT PURCHASE & SALE AGREEMENT BSRA City of Orlando FDEP FL Brownfields EPA Superfund Public/Private Partnership Record of Decision ARCADIS CLEANED UP SITE & REDEVELOPED PROPERTY

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