Hazard Evaluation cont'd - DOE-STD-1120-1-20050033

DOE-STD-1120-2005/Vol. 1

that are considered and credited. DOE-STD-3009 provides example approaches for tabulating

and presenting this information.

Generally, the controls needed for environmental restoration activities can be derived from

qualitative hazard evaluation techniques such as what-if analysis or hazard checklists. The

hazard evaluation provides the input and basis to support control selection. HA results should be

documented in a hazard evaluation table that qualitatively shows the candidate controls as well

as those specifically credited. This complete listing of candidate and credited controls helps

clarify what was considered in the hazard evaluation.

NPH and man-made external hazards must be considered in accordance with 10 CFR 830,

Subpart B. Seismic hazards will not typically present a significant concern for restoration

projects, unless buildings and structures are involved in processing or storing hazardous

materials. Therefore, an evaluation of the impacts from seismic hazards may be a simple matter.

Other NPH such as high winds, floods and lightning can be problematic for some environmental

restoration projects which may not have protective barriers or facilities (i.e., open trenches with

non-containerized combustible wastes). These events should be considered in the hazard

analysis, as applicable.

Certain man-made external events can also be problematic for environmental restoration projects

due to factors such as a high frequency of waste transports. For example, a vehicle impact and

subsequent fire associated with staged or stored waste drums generated during environmental

restoration should not be dismissed if the event is within frequency ranges discussed in Section

3.4 of DOE-STD-3009. Aircraft crashes must also be considered in accordance with DOE-

STD-3014, Accident Analysis for Aircraft Crash into Hazardous Facilities, which has

applicability to Hazard Category 1 or 2 facilities, as well as those projects where hazardous

chemical inventory exceeds thresholds of 29 CFR 1910.119 or 40 CFR 68, Chemical Accident

Prevention Provisions. HA information can also be found in Appendix D related to small

aircraft crash impacts.

The presentation of hazard and accident analysis information should be consistent with the types

and anticipated progression of environmental restoration activities. Hazards from typical

restoration activities that should be considered include:

Setup and mobilization needs to consider siting and accumulation of combustibles (fueling

operations for equipment) or other fire hazards that could have an impact on subsequent

phases of restoration.

Equipment operation may cause subsidence or compaction that creates a shift in packaged

wastes (if present).

Monitoring well installation may create a pathway for release or re-distribution of packaged

wastes (e.g., penetration of waste package and redistribution of reactive chemical to create an

exothermic condition).

Trenching activities for diversion of surface water runoff could introduce a new pathway for

impacting or relocating the waste matrix.

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