Table 1. Information Sources for Risk Assessment Within the Dredged Material Management Pogram

Table 1.

Information Sources for Risk Assessment Within the Dredged Material Management

Program

(" " Indicates information is available for use in a particular section of risk assessment)

Site Selection

Report and

Associated

Environmental

Reports

Tier I

Tier II

Tier III

Tier IV

Type of

Sensitive habitats or

Characterize

Predictive models to

W ater column

Chronic sublethal

Information

species,

sediment; selection

assess physical

toxicity; sediment

sediment toxicity;

Available

commercially

of COCs; review

transport and water

toxicity;

steady-state

important species

existing data

quality impacts;

bioaccumulation

using the site,

Theoretical

testing

recreational or

Bioaccumulation

commercial uses of

Model

the site, types of

biological

communities nearby

Risk

Assessment

Component

Identify

Receptors

Hazard

Identification

Identify COCs

Toxicity

Assessment

Exposure

Assessment

Risk

Characterizatio

Uncertainty

of prior chemical testing, measurements of physical characteristics, organic carbon

content, grain size, and review of regulatory records and published literature

regarding the material to be dredged (published studies, permit reviews, federal

databases, etc.). This information is generally sufficient for a risk assessor to

develop the Hazard Identification and develop a list of contaminants of concern

(COCs). Note that specifying COCs is an integral part of risk assessment which will

have already been accomplished as a Tier I activity based on explicit criteria in the

several dredged material testing manuals (USEPA/USACE 1991, 1998).

Chapter 1 Overview of Ecological and Human Health Risk