Site History

DOE-STD-1120-2005/Vol. 1

equipment and materials, both off-site and within the site, should also be described.

Introduction

Restoration Project and Site Description (Section 4.1)

Site Location

Site History

Restoration Project Activities and Techniques

Hazard and Accident Analysis (Section 4.2)

Methodology

Hazard Analysis Results (includes hazards identification, categorization, evaluation)

Accident Analysis (Hazard Category 2 facilities with accidents that potentially challenge the

Evaluation Guideline)*

Hazard Controls (Section 4.3)

Safety SSCs (includes safety functions, functional requirements, system evaluation)*

Safety Management Programs

Specific Administrative Controls

*Typically not expected for vast majority of environmental restoration projects

Figure 3. Simplified DSA Format for Environmental Restoration Projects

4.1.2 Site History

Background information should be presented on activities that led to the condition requiring

restoration. Previous waste disposal activities should be described in terms of the types and

quantities of radioactive and hazardous materials and methods used for treatment and disposal

(i.e., container burial, seepage ponds, direct injection). Other details that are important to the

analysis include the estimated condition of any waste containers being exhumed, design details

of disposal trenches or wells that were used, characterization and sampling activities performed

and the resulting estimated contamination levels that are expected.

4.1.3Restoration Project Activities and Techniques

The scope of the restoration activity should be presented in sufficient detail that is commensurate

with the expected hazards and complexity of the project. The description should include the

regulatory driver for restoration, planned characterization activities, primary operational phases

that comprise the project, any work sequencing requirements and parallel work activities, and the

anticipated final state upon completion of the restoration activity. Temporary or permanent

SSCs that are part of the project should also be presented.

Restoration techniques should also be described, including the requirements for power, cooling

water and other external supplies to the equipment used to carry out activities. Soil restoration

techniques generally fall into one of four categories:

Soil Capping and Ground Penetrations to Support Monitoring Activities installation of soil

capping and/or minor intrusive activity into the waste matrix for monitoring the effectiveness

of an environmental cap, e.g., ground water wells, piezometer well installation, or some other

means of environmental effectiveness measurement.

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