Former Spellman Engineering Site

Project Update MeetingMarch 18, 2008

William C. Denman, P.E.

Remedial Project Manager

Denman.Bill@epa.gov

(404) 562-8939

Former Spellman EngineeringBackground - Location

Release Location

Background – RI/FSExtent of Ground Water Contamination

Conceptual Site Model

Vertical Distribution of TCE

Contamination in Ground Water

BackgroundRI/FS (cont.)

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

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)

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)

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

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

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

• 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

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