Hazard Evaluation - DOE-STD-1120-1-20050031

DOE-STD-1120-2005/Vol. 1

characterization activities (e.g., sampling and analysis) should be determined based on the

collection and evaluation of facility information, the remaining level of uncertainty regarding

existing hazardous substances (i.e., radiological materials, hazardous chemicals, or hazardous

wastes), and the existing facility condition. Consider characterization activities if there is

insufficient knowledge of hazards to understand the hazardous substance types, quantities,

forms, potential exposures, and locations.

4.2.1.2

Hazard Evaluation

This subsection should present the approach used to identify and evaluate hazards, including

hazard evaluation techniques and methods used to qualitatively estimate accident consequences

and likelihood. Ranking or binning schemes applied to hazardous events should also be

described, and where used, should be considerate of all receptors (i.e., public, onsite personnel,

and facility workers). An example of risk binning guidelines is presented in Appendix E that

may be applied to environmental restoration projects. A discussion of hazard evaluation

methods appropriate for environmental restoration can be found in Chapters 4 and 5 of

Guidelines for Hazard Evaluation, prepared by the Center for Chemical Process Safety of the

American Institute of Chemical Engineers.

4.2.2

Hazard Analysis Results

The results of hazard identification and analysis efforts should be presented in this section of the

DSA. The format and guidance provided in Section 3.3.2 of DOE-STD-3009-94 should be

followed and should be inclusive of subsections related to hazard identification, categorization

and evaluation. Additional considerations for environmental restoration are presented below.

Hazard analysis activities that support Subpart B requirements of Part 830, as well as

HAZWOPER and other directives and regulations, may be integrated. This is a recommended

practice that is discussed in DOE-HDBK-1063-2003, Integration of Multiple Hazard Analysis

Requirements and Activities. Integration supports a common baseline of hazards information

and assumptions and encourages communication between various safety, environmental, security

and operations personnel.

4.2.2.1

Hazard Identification and Categorization

Environmental restoration activities typically involve radioactive or hazardous materials (i.e.,

hazardous substances, wastes or other constituents) that may be distributed unevenly over a large

area. The cumulative total of material inventory will often exceed HC3 threshold quantities

because of the large area being considered. However, waste materials or contamination is buried

in the ground at many of these sites and not subject to dispersive forces until exhumed, or

exhumed material may not be readily dispersible due to physical form or the method of

extraction. These activities are likely candidates to be downgraded below HC3 based on a

simple qualitative hazard analysis and final hazard categorization.

The Hazard Categorization process uses the total inventory in the project or project segment (if

segmentation is used in accordance with DOE-STD-1027-92) to categorize the environmental

restoration project. Soil, surface and groundwater contaminants are typically described in terms

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