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Former Spellman Engineering Site

City Council Meeting October 6, 2008 William C. Denman, P.E. Remedial Project Manager Denman.Bill@epa.gov (404) 562-8939. Former Spellman Engineering Site. Background – RI/FS Extent of Ground Water Contamination. Background RI/FS (cont.). Conceptual Site Model

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Former Spellman Engineering Site

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  1. City Council Meeting October 6, 2008 William C. Denman, P.E. Remedial Project Manager Denman.Bill@epa.gov (404) 562-8939 Former Spellman Engineering Site

  2. Background – RI/FSExtent of Ground Water Contamination

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

  4. 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

  5. Conceptual Remediation Plan

  6. 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

  7. Remedial Action Funding • Remedial Action - Funding Options • NPL Listing and Superfund financing based on site prioritization (risk-based) • Voluntary cleanup • City of Orlando and the local community indicated a strong preference for pursuing an approach that would keep the properties off the National Priorities List. • EPA supported this approach. • Superfund Redevelopment Initiative • 2002 Amendments to CERCLA

  8. EPA’s Role in the Cleanup • EPA will remain the lead agency with FDEP support throughout • EPA oversight throughout cleanup and approval for completion

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