diamond state port corporation edgemoor container … · cu, pcbs, pb, as, fe dredging not expected...
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September 29, 2020
DIAMOND STATE PORT CORPORATION EDGEMOOR CONTAINER TERMINAL
Department of Natural Resources and Environmental ControlPUBLIC HEARING
Edgemoor Container Terminal
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Project Overview RCRA Permit Renewal Subaqueous Land Permit Details Subaqueous Land Permit Studies Project Benefits
Edgemoor Container Terminal
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PROJECT OVERVIEW
Edgemoor Container TerminalProject History
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Planning for the Future Master Planning Process 2016
Concluded expansion beyond current Port footprint is required to maintain viability of the port
Solicited Public Comment on Alternatives though Public Workshops and Stakeholder Meetings
Identifies Edgemoor site as preferred location for expansion DSPC acquires Edgemoor location from Chemours in 2017
RFP Process to select operator and expand Port Gulftainer USA/ GT USA Wilmington recommended as Port of Wilmington
Operator Approved by Diamond State Port Corporation Board on April 6, 2018 Approved by Delaware Capital Improvement Committee on April 19, 2018 Approved by Delaware General Assembly on April 24, 2018
Edgemoor Container TerminalProject Overview
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Edgemoor Container TerminalProject Overview
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Redevelop the 113-acre Edgemoor facility to construct a Container Terminal Facility Modern port facility equipped with electric cranes and gantries Configured to transfer cargo with larger ships, fewer ship calls
Demolition and removal of the existing site infrastructure Water Intake Structures Existing Dock Structures Industrial Wastewater and Industrial Outfall Structures Stormwater Outfall Structures
Construction of 2,600-feet of berthing on a pile supported high deck dock
Reconstruction of a 3,200-foot sea wall along the rear of the dock Dredging to access the berths aligning with the -45 feet main channel Implementation of sedimentation controls to reduce long term impacts Replace impervious cover to address legacy environmental issues
Edgemoor Container TerminalProject Overview - Public Outreach
GT USA Wilmington CEO Eric Casey discusses Port plans at Public Meeting
Local Organizations Council of Civic Organizations
for Brandywine Hundred Eastern Brandywine Hundred Edgemoor Civic Association Delaware Nature Society Brandywine Hundred
Fire CompanyCounty and State Elected OfficialsPublic Information Session – March 11, 2020 @ Mount Pleasant Elementary
~ 200 attendees
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Edgemoor Container Terminal
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RCRA PERMIT RENEWAL
Edgemoor Container TerminalRCRA Permit and Proposed Remediation
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Edgemoor Container TerminalRCRA Permit and Proposed Remediation
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2001 - DuPont starts RCRA process to address environmental issues at the site
2004 - 30 Solid Waste Management Units (SWMUs) identified
2009 to 2013 - DuPont and Chemours performed investigations and remediation SWMU 6 was closed using lined caps and post-closure
monitoring No Further Action (NFA) required at other SWMU
2017 – DSPC assumed the long term stewardship responsibility
Edgemoor Container TerminalRCRA Permit and Proposed Remediation
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Edgemoor Container TerminalRCRA Permit and Proposed Remediation
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Continue long term monitoring and maintenance at the closed, capped waste lagoons
Prepare work plans, schedules and design for the site work for DNREC Approval
Implement elements to limit human exposure and water infiltration into legacy environmental soils Soil Buffer and Impervious Cap New Storm-water management systems
Edgemoor Container Terminal
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SUBAQUEOUS LAND PERMIT DETAILS
Edgemoor Container TerminalSubaqueous Lands Application
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Delaware River Mile 73.2 Bellevue Range of River 2 miles north of Christina River Turbidity Maximum of Delaware
River
Sommerfield, 2007
Suspended Solids in at the Turbidity Maximum of River have been measured up to 1,000 mg/l
Turbidity is the measure of light penetration related to the concentration of suspended matter in water
Edgemoor Container TerminalSubaqueous Lands Application
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No Historical or Cultural Resources identified in the project area
Harbor Configuration was evaluated through ship simulations
Edgemoor Container TerminalSubaqueous Lands Application
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64-acre berth area, access channel (86.9 acres of dredging)
Dredging to maintain -45 feet MLLW 2,600-foot wharf with Sedimentation
Reducing Devices 3,200-foot Sheet Pile Bulkhead 5.5 Acres of Subaqueous Fill
Edgemoor Container TerminalSubaqueous Lands Application
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Dredging ProfileSilts Sands Sandy Clays
Harbor to be dredged with cutter suction head with slurry pumped to receiving storage area
Dredging within the established dredge periods of river
Confined Upland Disposal Beneficial Reuse of
Selected Materials as onsite fills Included in June 2020
Revision following discussion with DNREC
Edgemoor Container TerminalSubaqueous Lands Application
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Edgemoor Container TerminalSubaqueous Lands Application
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Sedimentation Reducing Devices Hydraulic Modeling shows that the
sedimentation is primarily a function of tidal velocity
High tidal velocity maintains the river profile Prevents accumulation of sediment
during tide cycles Low flow areas result in sedimentation
“hot spots”
Sediment Fans reduce accumulation of sedimentation by mimicking the higher tidal velocity in the main channel
Edgemoor Container Terminal
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SUBAQUEOUS LAND PERMIT STUDIES
Edgemoor Container TerminalSubaqueous Lands Application
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Joint Permitting Process Meeting attended April 19, 2018
DSPC developed a Environmental Assessment Technical Document pursuant to National Environmental Policy Act (NEPA)
NEPA Scoping Letter issued December 17, 2018
Technical Document supporting the
Application addresses Essential Fish Habitat Endangered Species Sediment Quality Water Quality
Edgemoor Container TerminalSubaqueous Lands Application - Habitat
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Considerations Essential Fish Habitat Mapped
by NMFS Mapper Local Affected Environment
Evaluate the quality and quantity of the existing natural resources in the project area
Wetlands Subaqueous Vegetation Benthic Community
Commercial and recreational species
Edgemoor Container TerminalSubaqueous Lands Application - Habitat
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Conclusions No wetlands in project area No Submerged Aquatic
Vegetation in project area
Edgemoor Container TerminalSubaqueous Lands Application - Habitat
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Conclusions Benthic community -- organisms
identified do not represent diverse assemblage, are pollutant tolerant and available in adjacent areas
Project is in high turbidity area –impact species accustomed to existing conditions
Rocky riverbed and Cherry Island Flats not impacted by disturbance
No indication of “Essential Fish Habitat” for spawning, breeding, feeding and growth for aquatic life in Local Assessed Area
Edgemoor Container TerminalSubaqueous Lands Application – Endangered Species
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Considerations Delaware River classified as
“Critical Habitat” for Atlantic Sturgeon
Additional potential Endangered Species at site include: shortnosed sturgeon turtles whales bats
Construction activities Additional Shipping Traffic Sedimentation Fans
Edgemoor Container TerminalSubaqueous Lands Application – Endangered Species
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Conclusions Project is in high turbidity area – construction turbidity unlikely to
impact species accustomed to existing conditions Construction will to occur outside migratory fish spawning
window March 1 – July 1 Removal of contaminated sediments will be beneficial to aquatic
food chain Conclusions of Biological Assessment
Critical habitats of Sturgon not significantly impacted by project Potential ship strikes – one additional Atlantic sturgeon mortality every
5.5 years; one additional shortnosed mortality every 85 years Not likely to adversely affect (NLAA) Biological Opinion has initiated from NMFS
Edgemoor Container TerminalSubaqueous Lands Application - Sediment
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Considerations Quality of material for reuse Environmental condition
Conclusions (DE Hazardous Substances Cleanup Act risk screening levels used) Silts and sands – benzo[a]pyrene, PCBs,
dioxin, arsenic, thallium above HSCA screening levels
Clays – typical arsenic, vanadium found in undisturbed Potomac soils
Removing sediments from the River provides positive benefit to local ecosystems – supports fishable goals
Sediment management maintains acceptable risks for human exposure
Edgemoor Container TerminalSubaqueous Lands Application – Water Quality
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Considerations Impacts during dredging CDF discharge
Conclusions River currently exceeds DRBC and DE standards for Al,
Cu, PCBs, Pb, As, Fe Dredging not expected to significantly change current
conditions CDF effluent is expected to meet regulatory requirements Removal of approximately 2.7 tons of sediments
containing PCBs is expected to provide net benefit to the River
Edgemoor Container Terminal
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PROJECT BENEFITS
Edgemoor Container TerminalProject Benefits Positions Port of Wilmington for projected growth in
container business Edgemoor Container Terminal is key component of
Gulftainer commitment to State of Delaware
Redevelopment of Legacy chemical plant site into productive use
Project investment = $400M creating 2,000+ jobs Value added to DE economy - $383 million/annually Total direct/indirect jobs -- 2,965 State and local tax revenue -- $22.2 million/annually
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