diamond state port corporation edgemoor container … · cu, pcbs, pb, as, fe dredging not expected...

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


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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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RCRA PERMIT RENEWAL

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


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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


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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


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No Historical or Cultural Resources identified in the project area

Harbor Configuration was evaluated through ship simulations


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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


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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


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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


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SUBAQUEOUS LAND PERMIT STUDIES


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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


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Conclusions No wetlands in project area No Submerged Aquatic

Vegetation in project area


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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


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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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diamond state port corporation edgemoor container … · cu, pcbs, pb, as, fe dredging not expected...

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