Characterization of Dredged Characterization of Dredged Material in New JerseyMaterial in New Jersey’’s s

Confined Disposal Facilities Confined Disposal Facilities for Beneficial Use for Beneficial Use

ApplicationsApplications

JenniferJennifer CurranCurranHDRHDR اا LMSLMS

3232ndnd Street Site Street Site Ocean City, NJOcean City, NJ

CDF

BackgroundBackground

BackgroundBackground

••CDF Capacity Reached in many CDF Capacity Reached in many locationslocations••Regulations and Shoreline Real Estate Regulations and Shoreline Real Estate costs Restrict Construction of new costs Restrict Construction of new FacilitiesFacilities••Capacity for new Dredging Projects: Capacity for new Dredging Projects: Renewed on a Case by Case BasisRenewed on a Case by Case Basis

BackgroundBackground

••LargeLarge--scale Beneficial Use Applicationsscale Beneficial Use Applications––Environmental BenefitsEnvironmental Benefits––Economic Benefits Economic Benefits –– Marine Trades, Cost Marine Trades, Cost Share for Federal ProjectsShare for Federal Projects

Study Purpose:Study Purpose:

To characterize the material To characterize the material stockpiled in stockpiled in CDFCDF’’ss sufficiently to sufficiently to obtain an Acceptable Use obtain an Acceptable Use Determination (AUD) from NJDEP Determination (AUD) from NJDEP for beneficial use applicationsfor beneficial use applications

USACE Site D, Middle Thorofare

Nummy Island

Ocean City 32nd Street

Waackaack Creek

Selected Selected CDFCDF’’ss::

SummarySummary::

Rough Volume Estimate:

•Nummy Island, Stone Harbor 90,000 cy

•Waackaack Creek, Keansburg 100,000 cy

•32nd Street Site, Ocean City 100,000 cy

•Corps Cell D, Cape May 500,000 cy

•Middle Thorofare, Cape May 60,000 cy

•TOTAL 850,000 cy

Sampling PlanSampling Plan::

••Locate recent surveyed site plansLocate recent surveyed site plans••Estimate volumeEstimate volume••Determine adequate level of Determine adequate level of analysisanalysis••Select core locationsSelect core locations

Text BlockText Block

NummyNummy IslandIslandStone Harbor, NJStone Harbor, NJ

CDF

Rough Volume Estimate: 90,000 cy

Text BlockText Block

TitleTitle::Nummy Island – Stone Harbor, NJ

NummyNummy IslandIslandVolume Volume

EstimateEstimate

90,600 cy90,600 cy

NummyNummy IslandIsland

Sampling Locations

Text BlockText Block

NummyNummy IslandIsland::

TopTop LayerLayerAverage Dredged Material Grain Size Distribution

50%

26%

24%

Clay Silt

43%

47%10%

Sand

MiddleMiddle LayerLayerAverage Dredged Material Grain Size Distribution

94%

3%3%

Clay Silt

0%2%

98%

Sand

BottomBottom LayerLayerAverage Dredged Material Grain Size Distribution

60%

22%

18%

Clay Silt

3%

7%90%

Sand

Chemical AnalysisChemical Analysis::

••All Sediment Samples fell below All Sediment Samples fell below NJ Residential Soil CleanNJ Residential Soil Clean--up up Criteria for all target Criteria for all target analytesanalytes

••LeachateLeachate tests for Selenium may tests for Selenium may be a concernbe a concern

ConclusionsConclusions::

••Large Volumes of relatively Clean, Large Volumes of relatively Clean, High Sand CompositionHigh Sand Composition Dredged Dredged MaterialMaterial••Many Potential Beneficial Use Many Potential Beneficial Use Options, including NJDOT Options, including NJDOT transportation projects and Flood transportation projects and Flood Control ProjectsControl Projects

ConclusionsConclusions::

••Removing Materials will be Difficult Removing Materials will be Difficult

••Economic Benefits Should be Further Economic Benefits Should be Further Evaluated and Weighed Against the Evaluated and Weighed Against the CostsCosts