preliminary design report figures d - us epa · notes:...

Figures

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



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


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.


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



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


NOTE:Curtain will ride up and down as the water level changes.


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



0.1 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


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



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


MechanicalDredge

In-situ

In-situ

Sediment

Sediment

BargeTransport

BargeOffloading

WaterDecanted

FIGURE

8-1

PROCESS FLOW SCHEMATICMECHANICAL DREDGING - 5 DAYS/WEEK



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


(See Final T&D)


Testing


& Testing


Testing


or Rail


SurfaceTesting

(If Needed)



Sump



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



360 cy/day0.074 mgd10,000 mg/L3.07 dry T/day


0.074 mgd10,000 mg/L3.07 dry T/day

2,700 wet T/day2,700 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


14 cy/day0.002 mgd20.0% solids (w/w)3.0 dry T/day



ResidualTesting


Backfill/Capping


BackfillStaging

ChemicalFeed

DewateringSystem

Unload Barge& Stage

Load to Rail -TSCA

Transport -Rail

TSCA



Tanks

HydraulicDredge

SlurryTransport

ReceivingBasins

TSCA Landfill

Holding/Receiving

Basins


Non-TSCALandfill

SizeSeparation


Basin



MultimediaFilters

CarbonAdsorbers

ClarifierUnderflow

FilterBackwash



GravityClarifier

EffluentDischarge




MechanicalDredge

In-situ

In-situ

Sediment

Sediment

BargeTransport

BargeOffloading

WaterDecanted

FIGURE

8-2

PROCESS FLOW SCHEMATICMECHANICAL DREDGING - 7 DAYS/WEEK



KEY:


= Alternative Route

= Primary Route

= Water Transport

= Slurry Transport

= Solid Transport

= NA




BargeTransport

Load to Barge

Lime Silo &Feeders



(See Final T&D)


Testing


& Testing


Testing


or Rail


SurfaceTesting

(If Needed)



Sump






91,000 cy/day18.4 mgd5% 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



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



ResidualTesting


Backfill/Capping


BackfillStaging

ChemicalFeed

DewateringSystem

Unload Barge& Stage

Load to Rail -TSCA

Transport -Rail

TSCA



Tanks

HydraulicDredge

SlurryTransport

ReceivingBasins

TSCA Landfill

Holding/Receiving

Basins


Non-TSCALandfill

SizeSeparation


Basin



MultimediaFilters

CarbonAdsorbers

ClarifierUnderflow

FilterBackwash



GravityClarifier

EffluentDischarge




MechanicalDredge

In-situ

In-situ

Sediment

Sediment

BargeTransport

BargeOffloading

WaterDecanted

FIGURE

8-3

PROCESS FLOW SCHEMATICHYDRAULIC DREDGING - 5 DAYS/WEEK



KEY:


= Alternative Route

= Primary Route

= Water Transport

= Slurry Transport

= Solid Transport

= NA




BargeTransport

Load to Barge

Lime Silo &Feeders



(See Final T&D)


Testing


& Testing


Testing


or Rail


SurfaceTesting

(If Needed)



Sump




65,000 cy/day13.1 mgd5% solids (w/w)2,700 dry T/day



0 cy/day0% solids (w/w)0 dry T/day0 wet T/day


2,600 wet T/day 2,600 wet T/day


0 cy/day

0 cy/day




13.1 mgd5% solids (w/w)2,700 dry T/day


2,400 cy/day0.48 mgd0.50% solids (w/w)10 dry T/day





ResidualTesting


Backfill/Capping


BackfillStaging

ChemicalFeed

DewateringSystem

Unload Barge& Stage

Load to Rail -TSCA

Transport -Rail

TSCA



Tanks

HydraulicDredge

SlurryTransport

ReceivingBasins

TSCA Landfill

Holding/Receiving

Basins


Non-TSCALandfill

SizeSeparation


Basin



MultimediaFilters

CarbonAdsorbers

ClarifierUnderflow

FilterBackwash



GravityClarifier

EffluentDischarge




MechanicalDredge

In-situ

In-situ

Sediment

Sediment

BargeTransport

BargeOffloading

WaterDecanted

FIGURE

8-4

PROCESS FLOW SCHEMATICHYDRAULIC DREDGING - 7 DAYS/WEEK



KEY:


= Alternative Route

= Primary Route

= Water Transport

= Slurry Transport

= Solid Transport

= NA




BargeTransport

Load to Barge

Lime Silo &Feeders


FIGURE

10-1

APPROXIMATE LOCATIONSOF DISPOSAL FACILITIES



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


KEY:

= Primary Route

= Alternative Route

= Information/Testing


preliminary design report figures d - us epa · notes:...

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