3. 3
Recent Activity
Phase I: Engineering & Design
o Selected proposed alternative
o Completed detailed designs
o Updated H&H and Geotech studies
o Calculated cost report
o Drafted EA
SHPO and §106 consultations
Coordinating agency consultations
8. 8
NPS CERCLA Process
o Site History
o NPS Response Action under CERCLA
o Limited radiological survey
o Coordination with technical experts
o Alignment with HMGP project
o Spring Creek is open
o Ongoing community engagement
9. 9
Challenges & Responses
Fiscal Realities
o Budget escalation: $65MM to $89MM-$118MM
o Size of site: 237 acres
o Excavation & disposal: $1MM to $20MM to $134MM
Berm up to 19′ NAVD88
Demarcation layer
o Phragmites root mat removal: $20MM
Compost; pelletize; multi-year herbicide
11. 11
Challenges & Responses − Stockpile
o Trucks enter /exit near
165th & CBB (92nd St.)
o Travel on NPS access
roads
o No radiation in selected
area
o Geotextile layer
o Erosion controls in place
o CLF for security
o 6-week project
12. 12
Challenges & Responses
Timeline
o FEMA approves EA prior to public release
o Public comment period rescheduled to summer
2018
o FONSI expected fall 2018
o 6-month extension request
Tentative Phase 1 due date: Dec. 31, 2018
