Quantity of the hazardous material;
Type, nature, and form of the hazardous materials (e.g., radioactive, toxicological,
chemical, liquid, or solid);
Location of the material;
Conditions under which the material is processed, handled, or stored (e.g. temperature,
pressure, handling systems); and
Specific hazards associated with the material.
Each job and related task should be analyzed to determine the hazards that may be present. For
example: Trenching (job) may require the operation of machinery (task). In addition to the
obvious hazards associated with trenching (e.g., cave-ins), the hazards associated with operation
of the machinery should be assessed. The information obtained from the assessment of site
operations and the identification of hazardous substances should be considered when analyzing
the various tasks at the site. Jobs and their related tasks should form the basis for documenting
the information obtained during the hazard assessment (see section 3.5).
Many techniques are available in the literature for performing hazard assessments. A list of
several methods that can be used for the assessment of identified hazards and subsequent
assignment of risk significance are contained in Appendix E.
The most efficient way to protect workers from workplace hazards is to first remove obvious
hazards that can be eliminated without significant effort. Within the scope of clean-up activities,
this can sometimes be difficult, since the objective of these activities is the actual removal of
Hazards should be controlled by the following hierarchy of methods:
Work practices and administrative controls, except where prohibited by standards, orders
or regulations; and
Often, physical hazards discovered through preliminary evaluations and site/facility
walkthroughs can be eliminated without significant effort or cost. These hazards should be
removed to the extent possible before actual work at the site begins. Examples of ways to
eliminate physical hazards associated with the site include:
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