01/23/04 SYR-D85-DJHC:20430003/cdr/20430f03.cdr

Notes:DAD Report = Dredge Area Delineation ReportSEDC = Supplemental Engineering Data CollectionSSAP = Sediment Sampling and Analysis ProgramUSCS = Unified Soil Classification System

FIGURE

1

Performengineering

design.

NO

NO

YES

YES

YES YES

YES

YES YES

YES

NO NO

NO

NO

NO

NO

NO

NO

NOYES

YESNO

YES

YES

START

Doesthe SSAP

provide adequateinformation to complete

the engineeringdesign?

Is

DAD

Report completed

and approved for

candidate Phase 1

areas?

Does

the SEDC

require test borings

in candidate

Phase 1

areas?

Does

the

bathymetry

affect the boring

location?

Maytriaxial or

Atterberg limit testingbe required due to

materialtype?

Does

the SEDC

require inventory

of river-related

infrastructure?

Isthe materialhomogenous

based on visual/USCSclassification of

the SSAPdata?

Canthe borings

be spaced evenly(laterally) within the

candidatearea?

DoesSEDC need

to be performed inthe candidate Phase 1areas with additionalintrusive field work

and labtesting?

Areborings

required in areasadjacent to candidate

Phase 1 areas todetermine potential

dredge prismgeometry?

Doesthe SEDC

require test boringsin areas adjacent to

candidate Phase 1 areasto determine potential

shoreline slopestability?

Adjust boring locationto capture anomalies

(not related tosediment type).

Modify boring plan toplace boring in areas

of concern alongthe shoreline.

Modify boring plan toestablish limits of the

dredge prism (possiblydue to rock outcrop).

Collect Shelby tubesample for potential

triaxial testing; also collectsamples for possibleAtterberg limit testing.

Modify boringtermination to 25 feet

below mudline.

Modify boring locationrelative to water depth(i.e., inaccessible due

to shallow water).

Create a flexible SEDCprogram to enable the

design to proceed.

Space borings tocapture material

variation/stratigraphy.

Perform desktopgeotechnical

analysis.

GENERAL ELECTRIC COMPANYHUDSON RIVER PCBS SUPERFUND SITE

SEDC WORK PLAN

GEOTECHNICAL FIELD SAMPLINGFLOW DIAGRAM

Cansheetpile beused as a

resuspension containmentsystem based on embedment

length required for sheetpile (i.e.refusal will not prohibit

sheetpile to be used b/cit is below the

end of thepile)

FIGURE

2

Performengineering

design.

NO NO

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

YES

YES

START

Havethe sample

locations (forfield work)

been identified?

Dothe samples

require testing (i.e.,grain size distribution,

shear strength,etc.)?

Doesthe dredge

area containsand/gravelmaterials?

Doesthe dredge

area consist ofa uniform

material type?

Doesthe dredge

area containsilts/clays?

Doesthe

dredge areacontain

organics?

Basedon field visual

classification andadditional sampling

required (e.g., clay/siltymaterial would require

a Shelbytube)

Collect additional sampleusing the appropriatemethod as specifiedin the SEDC Work

Plan and SOPs.

Select representativesamples for testing

(approximately25% of total samples

collected for area).

Perform necessarygeotechnical testing

relative to material typebased on engineering

judgment at a minimumof 25% of the total

samples.

Modify/add samplelocations as specified

by the engineer.

Keep samples archived.

Perform SPT fieldtest and vane

shear test.

GENERAL ELECTRIC COMPANYHUDSON RIVER PCBS SUPERFUND SITE

SEDC WORK PLAN

Perform desktopgeotechnical

analysis.

GEOTECHNICAL TESTING ANDANALYSIS FLOW DIAGRAM

Notes:SEDC = Supplemental Engineering Data CollectionSOPs = Standard Operating ProceduresSPT Standard Penetration Test=