SOME CHEMICAL SAFETY ASPECTS AT LANL Page: 4 of 10
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Authorization of Work: The defined work must be authorized by the appropriate line
manager/supervisor. The work authorization is based on the residual risk, which includes
reliability and certainty of controls to maintain an acceptable level of risk, the consequences and
likelihood of control failure, and adequacy of the controls to meet institutional, facility, and
activity requirements. Based on the residual risk in Table 1:
" If the residual risk is high, the work will not be authorized or performed
" Medium risk is authorized by a Division Director (or equivalent)
" Low risk is authorized by a Group leader (or equivalent)
" Minimal risk level is authorized by a supervisor.
Controls are periodically reviewed for continuous improvement and to reduce risk of the
operations.
Chemical Hazards
The information on chemicals (solid, liquid, gas), their properties (corrosivity, reactivity,
ignitability, and toxicity) through MSDS, associated hazards (e.g., carcinogen, irritant,
flammable, sensitizer, etc), labeling of hazards (using NFPA rating), and storage requirements
(compatible vs. incompatible chemicals) are provided in detail in the Chemical Management
document of LANL (LIR-402-510-01)9. These chemicals are managed under the Chemical
Hygiene Plan and Hazard Communication Plan, with each plan having several subset plans for
safe handling and operation of chemicals.
However, the identification of chemical hazards, screening criteria, hazard analysis, and
consequence analysis are performed using some guidelines from 29 CFR 1910.11910 (Process
Safety Management of Highly Hazardous Chemicals), 40 CFR 68.13011 (Chemical Accident
Prevention), threshold reportable quantity (RQ) from 40 CFR 302.412, and total planning
quantity (TPQ) from 40 CFR 35513 (Emergency Planning and Notification).
Potential Hazard Identification: Table 2 lists various potential hazard categories that mostly
deal with chemicals and various items under each category. Failure of an item/action can result
in an accident that can lead to a minor to a major consequence. Potential failure categories are as
follows:
" Chemical Reaction
" Electrical
" Flammability and Fires
" Heat and Temperature
" Pressure
" Explosion
* Radiation
" Toxicity
" Leak of Material
" Human Error
" Equipment FailureChemical Safety, LA-UR-01-2607
4
J.C. Laul
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LAUL, J. SOME CHEMICAL SAFETY ASPECTS AT LANL, article, May 1, 2001; New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc720518/m1/4/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.