FINAL CANDIDATE SITESBEING EVALUATED BY USEPA
FIGURE
4-1Miles
0 2 4 8 12
GENERAL ELECTRIC COMPANYHUDSON RIVER PCBS SUPERFUND SITE
PRELIMINARY DESIGN REPORT
REFERENCE:1. Ecology & Environment, 2003.
TYPICAL DETAILS OF TURBIDITYCURTAIN CONTROL PROCESS OPTION
SILT CURTAIN LOAD TYPE CONNECTORCENTER TENSION SILT CURTAIN MOORING AND ANCHOR SYSTEM
SOURCE:1. Parker Systems, 2003.
FIGURE
6-1
GENERAL ELECTRIC COMPANYHUDSON RIVER PCBS SUPERFUND SITE
PRELIMINARY DESIGN REPORT
Shoreline
Silt Curtain
Anchor Buoy
Dredge Area
Flow
InnerSilt Curtain
OutterSilt Curtain
Anchor Buoy
Dredge Area
Flow
Shoreline
Anchor Buoy(s)
Dredge Area
Flow
Shoreline
Silt Curtain
Anchor Buoy(s)
Dredge AreaFlow
SiltCurtain
SiltCurtain
Shoreline
Anchor Buoy
Dredge Area
Flow
Silt Curtain
Shoreline Shoreline
AnchorBuoy
Flow
Silt Curtain
UpstreamSilt Curtain
NOT-TO-SCALE
POTENTIAL CONCEPTUAL LAYOUTAND CONFIGURATION OF SILT
CURTAIN CONTROL
GENERAL ELECTRIC COMPANYHUDSON RIVER PCBS SUPERFUND SITE
Single silt curtain control for near shoreline dredge area.Secondary downstream silt curtain to allow access to dredge area.
Single mid-river perimeter silt curtain.
Double silt curtain control to allow alternative openings forvessel access along near shoreline dredge area.
Single silt curtain control with upstream velocity reductionsecondary silt curtain.
U-shaped silt curtain.
Upstream deflection with U-shaped curtain downstream.
PRELIMINARY DESIGN REPORT
FIGURE
6-2
Access Road
NOTES:1. These are conceptual layouts and are not meant to represent all possible combinations.2. Certain sections of silt curtain maybe temporarilly removed to allow vessel access.
Access Road
Access Road Access Road Access Road
Access RoadA
D
B
E
C
F
Dredge Area
Near ShoreStructures
Shoreline
Sheetpile Wall
Dredge Area
Flow
Sheetpile Wall
Dredge Area
Flow
Shoreline
Access Road
Access Road
SheetpileWall
Dredge Area
Flow
Sheetpile Wall
SiltCurtain
DredgeArea
Flow
SheetpileWallSilt Curtain
Silt Curtain
Silt Curtain
Dredge Area
Flow
Sheetpile Wall
Dredge Area
Flow
Air Curtain
NOT-TO-SCALE
POTENTIAL CONCEPTUAL LAYOUTAND CONFIGURATION OF
SHEETPILE WALL CONTROL
GENERAL ELECTRIC COMPANYHUDSON RIVER PCBS SUPERFUND SITE
PRELIMINARY DESIGN REPORT
FIGURE
6-4
Sheetpile wall control for near shoreline dredge area.
Sheetpile wall control for mid-river dredge area with siltcurtain for gate protection.
Sheetpile wall control for near shoreline dredge area nearsensitive structure (as needed).
Partial sheetpile wall control utilizing silt curtains formid-river dredge area. Silt curtain may be removed toallow vessel access.
Sheetpile wall control utilizing air curtain to provide accessfor vessels.
Sheetpile wall control with internal silt curtains to separatework areas and allow area access protection.
Near ShoreStructures
Access Road Access Road Access Road
Access RoadA
D
B
E
C
F
NOTES:1. These are conceptual layouts and are not meant to represent all possible combinations.2. Certain sections of silt curtain maybe temporarilly removed to allow vessel access.
KING PILE SYSTEM
SEDIMENT REMOVAL AREA TYPICAL PLAN VIEW
River
River
Subgrade
Sediment
SECTION A - A'
Silt Curtain/Filter Fabric
Cable
Caisson orH-Pile Alternate
Caisson
CaissonAttachment
Silt Curtain Floatation
Silt Curtain/Filter Fabric
Cable Attachment (typ.)
Top of SedimentCaisson Embedmentto be Determined
Average Water Elevation
Sediment Removal Area
SedimentRemoval Area
A'
A
GalvanizedChain Ballast
GENERAL ELECTRIC COMPANYHUDSON RIVER PCBS SUPERFUND SITE
NOTE:Curtain will ride up and down as the water level changes.
PRELIMINARY DESIGN REPORT
FIGURE
6-5
Disposal orBeneficial Use
(See Final T&D)
Coarse SolidsStaging &
Testing
SolidifiedCake Staging
& Testing
Filter CakeStaging &
Testing
Load toBarge, Truck,
or Rail
MaterialAcceptable forBeneficial Use
SurfaceTesting
(If Needed)
EffluentHoldingFacilities
Settled EffluentCollection
Sump
0.099 mgd100 mg/L0.04 dry T/day
0.099 mgd100 mg/L0.04 dry T/day
0.1 mgd1000 mg/L0.04 dry T/day
0.1 mgd1,000 mg/L0.42 dry T/day
0.103 mgd10,000 mg/L4.3 dry T/day
66% w/w4,400 dry T/day6,600 wet T/day
5,100 cy/day59% solids (w/w)3,800 dry T/day
4,000 cy/day68% solids (w/w)3,800 dry T/day
510 cy/day0.103 mgd10,000 mg/L4.30 dry T/day
4,600 cy/day63% solids (w/w)3,800 dry T/day6,000 wet T/day
0.103 mgd10,000 mg/L4.3 dry T/day
3,800 wet T/day
2,800 wet T/day
600 T/day
0 ct/day0 cy/day
3,800 wet T/day
2,800 wet T/day
0.103 mgd10,000 mg/L4.3 dry T/day
0.002 mgd35.9% solids (w/w)3.9 dry T/day
20 cy/day0.004 mgd20.0% solids (w/w)4.3 dry T/day
0.002 mgd4.40% solids (w/w)0.27 dry T/day
0.099 mgd100 mg/L0.04 dry T/day
ResidualTesting
Mix &Coagulation/Flocculation
Backfill/Capping
HabitatMaterialStaging
BackfillStaging
ChemicalFeed
DewateringSystem
Unload Barge& Stage
Load to Rail -TSCA
Transport -Rail
TSCA
Water Uptakeby Dredge
DewateringConditioning
Tanks
HydraulicDredge
SlurryTransport
ReceivingBasins
TSCA Landfill
Holding/Receiving
Basins
Load to Rail -Non-TSCA
Non-TSCALandfill
SizeSeparation
Dredge SlurryEqualization
Basin
Dredge SlurryHoldingBasins
DewateringConditioningChemicals
MultimediaFilters
CarbonAdsorbers
ClarifierUnderflow
FilterBackwash
BackwashWater Holding
DisinfectionChemical
GravityClarifier
EffluentDischarge
Storm Water& DeconWater
Pug Mill -Solidification
Water Uptakeby Dredge
MechanicalDredge
In-situ
In-situ
Sediment
Sediment
BargeTransport
BargeOffloading
WaterDecanted
FIGURE
8-1
PROCESS FLOW SCHEMATICMECHANICAL DREDGING - 5 DAYS/WEEK
GENERAL ELECTRIC COMPANYHUDSON RIVER PCBS SUPERFUND SITE
PRELIMINARY DESIGN REPORT
KEY:
= Sampling and Analysis
= Alternative Route
= Primary Route
= Water Transport
= Slurry Transport
= Solid Transport
= NA
NOTE:This Conceptual Process Flow is preliminary and will bemodified, as appropriate, as the design progresses.
HabitatReconstruction/Replacement
Rail Transport- Non-TSCA
BargeTransport
Load to Barge
Lime Silo &Feeders
Transport BeneficialUse
Disposal orBeneficial Use
(See Final T&D)
Coarse SolidsStaging &
Testing
SolidifiedCake Staging
& Testing
Filter CakeStaging &
Testing
Load toBarge, Truck,
or Rail
MaterialAcceptable forBeneficial Use
SurfaceTesting
(If Needed)
EffluentHoldingFacilities
Settled EffluentCollection
Sump
0.071 mgd100 mg/L0.03 dry T/day
0.071 mgd100 mg/L0.03 dry T/day
0.072 mgd1,000 mg/L0.30 dry T/day
0.072 mgd1,000 mg/L0.30 dry T/day
66% w/w3,100 dry T/day4,700 wet T/day
3,600 cy/day59% solids (w/w)2,700 dry T/day
3,000 cy/day68% solids (w/w)2,700 dry T/day
360 cy/day0.074 mgd10,000 mg/L3.07 dry T/day
3,300 cy/day63% solids (w/w)2,700 dry T/day4,300 wet T/day
0.074 mgd10,000 mg/L3.07 dry T/day
2,700 wet T/day2,700 wet T/day
2,000 wet T/day2,000 wet T/day
430 T/day
0 ct/day0 cy/day
0.074 mgd10,000 mg/L3.0 dry T/day
0.074 mgd10,000 mg/L3.0 dry T/day
0.001 mgd35.9% solids (w/w)3.0 dry T/day
14 cy/day0.002 mgd20.0% solids (w/w)3.0 dry T/day
0.001 mgd4.40% solids (w/w)0.27 dry T/day
0.071 mgd100 mg/L0.03 dry T/day
ResidualTesting
Mix &Coagulation/Flocculation
Backfill/Capping
HabitatMaterialStaging
BackfillStaging
ChemicalFeed
DewateringSystem
Unload Barge& Stage
Load to Rail -TSCA
Transport -Rail
TSCA
Water Uptakeby Dredge
DewateringConditioning
Tanks
HydraulicDredge
SlurryTransport
ReceivingBasins
TSCA Landfill
Holding/Receiving
Basins
Load to Rail -Non-TSCA
Non-TSCALandfill
SizeSeparation
Dredge SlurryEqualization
Basin
Dredge SlurryHoldingBasins
DewateringConditioningChemicals
MultimediaFilters
CarbonAdsorbers
ClarifierUnderflow
FilterBackwash
BackwashWater Holding
DisinfectionChemical
GravityClarifier
EffluentDischarge
Storm Water& DeconWater
Pug Mill -Solidification
Water Uptakeby Dredge
MechanicalDredge
In-situ
In-situ
Sediment
Sediment
BargeTransport
BargeOffloading
WaterDecanted
FIGURE
8-2
PROCESS FLOW SCHEMATICMECHANICAL DREDGING - 7 DAYS/WEEK
GENERAL ELECTRIC COMPANYHUDSON RIVER PCBS SUPERFUND SITE
PRELIMINARY DESIGN REPORT
KEY:
= Sampling and Analysis
= Alternative Route
= Primary Route
= Water Transport
= Slurry Transport
= Solid Transport
= NA
NOTE:This Conceptual Process Flow is preliminary and will bemodified, as appropriate, as the design progresses.
HabitatReconstruction/Replacement
Rail Transport- Non-TSCA
BargeTransport
Load to Barge
Lime Silo &Feeders
Transport BeneficialUse
Disposal orBeneficial Use
(See Final T&D)
Coarse SolidsStaging &
Testing
SolidifiedCake Staging
& Testing
Filter CakeStaging &
Testing
Load toBarge, Truck,
or Rail
MaterialAcceptable forBeneficial Use
SurfaceTesting
(If Needed)
EffluentHoldingFacilities
Settled EffluentCollection
Sump
16.4 mgd2 mg/L0.14 dry T/day
16.4 mgd2 mg/L0.14 dry T/day
16.8 mgd20 mg/L1.4 dry T/day
16.8 mgd20 mg/L1.4 dry T/day
4,000 cy/day68% solids (w/w)3,800 dry T/day
91,000 cy/day18.4 mgd5% solids (w/w)3,800 dry T/day
88,000 cy/day5% solids (w/w)3,800 dry T/day
88,000 cy/day5% solids (w/w)3,800 dry T/day
0 cy/day0% solids (w/w)0 dry T/day0 wet T/day
5,000 cy/day60% solids (w/w)3,800 dry T/day6,300 wet T/day 3,600 wet T/day 3,600 wet T/day
2,700 wet T/day 2,700 wet T/day
0 cy/day
0 cy/day
17.1 mgd200 mg/L14 dry T/day
17.1 mgd200 mg/L14 dry T/day
17.1 mgd200 mg/L14 dry T/day
18.4 mgd5% solids (w/w)3,800 dry T/day
0.34 mgd0.9% solids (w/w)13 dry T/day
3,300 cy/day0.68 mgd0.50% solids (w/w)14 dry T/day
0.34 mgd0.09% solids (w/w)1 dry T/day
16.4 mgd2 mg/L0.14 dry T/day
ResidualTesting
Mix &Coagulation/Flocculation
Backfill/Capping
HabitatMaterialStaging
BackfillStaging
ChemicalFeed
DewateringSystem
Unload Barge& Stage
Load to Rail -TSCA
Transport -Rail
TSCA
Water Uptakeby Dredge
DewateringConditioning
Tanks
HydraulicDredge
SlurryTransport
ReceivingBasins
TSCA Landfill
Holding/Receiving
Basins
Load to Rail -Non-TSCA
Non-TSCALandfill
SizeSeparation
Dredge SlurryEqualization
Basin
Dredge SlurryHoldingBasins
DewateringConditioningChemicals
MultimediaFilters
CarbonAdsorbers
ClarifierUnderflow
FilterBackwash
BackwashWater Holding
DisinfectionChemical
GravityClarifier
EffluentDischarge
Storm Water& DeconWater
Pug Mill -Solidification
Water Uptakeby Dredge
MechanicalDredge
In-situ
In-situ
Sediment
Sediment
BargeTransport
BargeOffloading
WaterDecanted
FIGURE
8-3
PROCESS FLOW SCHEMATICHYDRAULIC DREDGING - 5 DAYS/WEEK
GENERAL ELECTRIC COMPANYHUDSON RIVER PCBS SUPERFUND SITE
PRELIMINARY DESIGN REPORT
KEY:
= Sampling and Analysis
= Alternative Route
= Primary Route
= Water Transport
= Slurry Transport
= Solid Transport
= NA
NOTE:This Conceptual Process Flow is preliminary and will bemodified, as appropriate, as the design progresses.
HabitatReconstruction/Replacement
Rail Transport- Non-TSCA
BargeTransport
Load to Barge
Lime Silo &Feeders
Transport BeneficialUse
Disposal orBeneficial Use
(See Final T&D)
Coarse SolidsStaging &
Testing
SolidifiedCake Staging
& Testing
Filter CakeStaging &
Testing
Load toBarge, Truck,
or Rail
MaterialAcceptable forBeneficial Use
SurfaceTesting
(If Needed)
EffluentHoldingFacilities
Settled EffluentCollection
Sump
12.0 mgd20 mg/L1.0 dry T/day
12.0 mgd20 mg/L1.0 dry T/day
3,000 cy/day68% solids (w/w)2,700 dry T/day
65,000 cy/day13.1 mgd5% solids (w/w)2,700 dry T/day
62,000 cy/day5% solids (w/w)2,700 dry T/day
62,000 cy/day5% solids (w/w)2,700 dry T/day
0 cy/day0% solids (w/w)0 dry T/day0 wet T/day
3,500 cy/day60% solids (w/w)2,700 dry T/day4,500 wet T/day
2,600 wet T/day 2,600 wet T/day
1,900 wet T/day1,900 wet T/day
0 cy/day
0 cy/day
12.2 mgd200 mg/L10 dry T/day
12.2 mgd200 mg/L10 dry T/day
12.2 mgd200 mg/L10 dry T/day
13.1 mgd5% solids (w/w)2,700 dry T/day
0.24 mgd0.9% solids (w/w)9 dry T/day
2,400 cy/day0.48 mgd0.50% solids (w/w)10 dry T/day
0.24 mgd0.09% solids (w/w)1 dry T/day
11.7 mgd2 mg/L0.10 dry T/day
11.7 mgd2 mg/L0.10 dry T/day
11.7 mgd2 mg/L0.10 dry T/day
ResidualTesting
Mix &Coagulation/Flocculation
Backfill/Capping
HabitatMaterialStaging
BackfillStaging
ChemicalFeed
DewateringSystem
Unload Barge& Stage
Load to Rail -TSCA
Transport -Rail
TSCA
Water Uptakeby Dredge
DewateringConditioning
Tanks
HydraulicDredge
SlurryTransport
ReceivingBasins
TSCA Landfill
Holding/Receiving
Basins
Load to Rail -Non-TSCA
Non-TSCALandfill
SizeSeparation
Dredge SlurryEqualization
Basin
Dredge SlurryHoldingBasins
DewateringConditioningChemicals
MultimediaFilters
CarbonAdsorbers
ClarifierUnderflow
FilterBackwash
BackwashWater Holding
DisinfectionChemical
GravityClarifier
EffluentDischarge
Storm Water& DeconWater
Pug Mill -Solidification
Water Uptakeby Dredge
MechanicalDredge
In-situ
In-situ
Sediment
Sediment
BargeTransport
BargeOffloading
WaterDecanted
FIGURE
8-4
PROCESS FLOW SCHEMATICHYDRAULIC DREDGING - 7 DAYS/WEEK
GENERAL ELECTRIC COMPANYHUDSON RIVER PCBS SUPERFUND SITE
PRELIMINARY DESIGN REPORT
KEY:
= Sampling and Analysis
= Alternative Route
= Primary Route
= Water Transport
= Slurry Transport
= Solid Transport
= NA
NOTE:This Conceptual Process Flow is preliminary and will bemodified, as appropriate, as the design progresses.
HabitatReconstruction/Replacement
Rail Transport- Non-TSCA
BargeTransport
Load to Barge
Lime Silo &Feeders
Transport BeneficialUse
FIGURE
10-1
APPROXIMATE LOCATIONSOF DISPOSAL FACILITIES
GENERAL ELECTRIC COMPANYHUDSON RIVER PCBS SUPERFUND SITE
PRELIMINARY DESIGN REPORT
KEY:
TSCA Facilities
Non-TSCA Facilities
FIGURE
11-1
Backfill/CapMaterial Selection
Backfill/CapMaterial Placement
SurfaceTesting?
Redredge?
Backfill/cap Material Sources
BackfillMaterial
CapMaterial
Other Materials(Armor, Fabric, Media)
Rail YardOff-Loading
Rail Transport
Off-Site Disposal
MaterialInventory
Management
ResidualTesting
Barge Loading
Dredge Area
BargeTransport
Area Completed- Remove Containment (If Used)- Habitat Reconstruction
(If Required)
NO
YES
PASS (ORNOT REQUIRED)
FAIL
Barge Staging- Backfill- Cap- Others
BeneficialUse Off-Site
MaterialSuited for
Beneficial Use
Dredge MaterialProcessing
On-Site Backfill/Cap MaterialStockpiling
Backfill Material
Cap Materials
Other Materials(Armor, Fabric, Media)
Material Blending
BargeTransport
BargeOff-Loading
BACKFILLING/CAPPING PROCESSFLOW DIAGRAM
GENERAL ELECTRIC COMPANYHUDSON RIVER PCBS SUPERFUND SITE
KEY:
= Primary Route
= Alternative Route
= Information/Testing
PRELIMINARY DESIGN REPORT
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