Terminal 25 South Cleanup
Authorization for Removal Design/Removal Action Order with EPA
September 22, 2026
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Item No. 8c supp
Meeting Date: Sept. 22, 2026
• Unique, very high ecological value in
saltwater transition zone
• Three related projects, one
mobilization:
– Upland cleanup required by EPA
– Sediments cleanup required as
East Waterway “Early Action”
pursuant to EPA interim record of
decision (IROD)
– 10-acre habitat restoration
Project Site: T25 South
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• Cleanup must satisfy EPA
• In-water cleanup treated as East
Waterway “early action,” must meet
IROD
• Upland cleanup to remove historical PCB
hotspot discovered in 2019
• Estimated cost for cleanup (full removal)
– Sediments Cleanup:$61 M
– Upland Cleanup: $71 M
• Habitat design and construction will be
integrated with the cleanup
Soil & Sediment Cleanup
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Key Schedule Milestones
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Field Investigation/Data Approval Q1 2025 (complete)
EPA EE/CA Approval/Action Memo Q3 2026 (complete)
GC/CM Solicitation Q3 2026 (complete)
EPA Design and Action Order Q3 2026 (This Item)
30% Design to EPA Q1 2027
GC/CM Contractor Inclusion Q1 2027
60% Design to EPA Q3 2027
90% Design to EPA Q1 2028
100% Design & Permitting Q3 2028
Construction Q1 2029 – Q2 2031
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QUESTIONS?
1936 2026 2031
Habitat Restoration
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Restores 10 acres to fully functioning riparian, marsh, intertidal, and subtidal habitat:
• Install substrates, vegetation, anchored wood, cobble, and intertidal channels
• Green stormwater infrastructure to protect site from runoff from adjacent NWSA site
• Public access not permitted, but site contributes to viewshed and popular fishing area
