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CBRNE HAZWOPER

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Situations that would require periodic monitoring are:

• Initial site entry or previous periodic monitoring have identified concentrations that exceed published exposure limits.
• Work is started at a different area of the site.
• Contaminants that have not been quantified are handled.
• Different tasks/operations are initiated.
• Personnel are working in areas of obvious contamination.
(i.e., liquid pools etc.)

Other Equipment Available

Table 6 lists equipment used by military organizations not mentioned elsewhere in this bulletin.
Monitoring High-Risk Employees

As required by 29 CFR 1910.120(h)(4), CBRNE training online air sampling should be performed on employees that are "likely to have the highest exposures to hazardous substances and health hazards likely to be present above permissible exposure limits or published exposure levels." Air sampling will continue to be performed if results exceed PEL or other published exposure limits until all employees likely to be above those limits are identified. Representative air sampling may be used.

Summary

The goal of personal air sampling is to characterize the dose of a chemical hazard that a worker receives during a typical work shift. The dose is generally defined as the amount of a hazard that actually enters a workers body. Since the dose is difficult to measure, the most common estimate of worker exposure is the breathing zone (BZ) concentration (ACGIH, 1991). OSHA and the National Institute for Occupational Safety and Health (NIOSH) have published the most widely used personal air sampling methods. USEPA/ERT has developed standard operating procedures that have modified OSHA HAZWOPER and NIOSH methods. Personal air sampling is usually performed with personal sampling pumps and/or personal passive dosimeters. However, direct reading instrumentation can provide good characterization of worker hazard exposures. Tables 3 through 5 provide a listing of air sampling equipment, air monitoring instrumentation and analytical instruments used by USEPA/ERT to perform personal air sampling. In order to provide good characterization of worker exposures using direct reading instrumentation, the following stipulations should be followed:

• The instrument must be able to measure the specific chemical compound.

• Sampling should be performed in the workers breathing zone.

• Conditions of the site have not changed. If these stipulations cannot be met, traditional air sampling methods should be used.

It must be remembered that the goal of personal air sampling is to estimate the potential dose of a chemical hazard by measuring the concentrations of the chemical in the workers breathing zones. Once personal air sampling has been performed, site conditions are monitored for any changes. If changes do not occur, sampling results from previous evolutions should be representative of exposures. However, the best method for estimating worker exposure during CBRNE training online is through personal air sampling using NIOSH, OSHA, or USEPA methods.

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