1. 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

2. Former Spellman Engineering Background - Location Release Location

3. Background – RI/FS Extent of Ground Water Contamination

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

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 Approach Source 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 Approach Dilute 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 Approach Post-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 Engineering Remedial 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. 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

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