Exposure Pathway Flowchart

February, 1998

4

Receptors:

• Residents

• Commercial or Industrial workers

• Construction workers

• Recreational Users

• Relevant Ecological Receptors and Habitats

SOURCES

SOURCE AREA

EXPOSURE

ROUTES

RECEPTORS

TRANSPORT

MECHANISMS

Affected

Sub-surface

Soils

(> 3 ft depth)

Sources:

• Product Storage

• Piping/Distribution

• Operations

• Waste Mgmt Units

• Other

Above Ground

Storage Tank Piping

Leaching and

Ground Water

Transport

GROUND WATER

Potable Water Use

Commercial or Industrial Workers

Source Area:

• Surface Soils

• Subsurface Soils

• Dissolved Ground Water Plume

• Non-Aqueous Phase Liquid (NAPL)

• Sediments

Transport Mechanisms:

• Wind Erosion & Atmospheric Dispersion

• Volatilization and Enclosed Space Accumulation

• Leaching to Ground Water Transport

• Mobile NAPL Migration

• Storm water/Surface Water Transport

Exposure Routes:

• Dermal Contact

• Ingestion

• Inhalation of Particulate

• Inhalation of Vapors

• Potable Water Use:
  • Ingestion
  • Cooking
  • Showering
  • Cleaning

• Swimming

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