TAILIEUCHUNG - Health Safety and Environment_5

Tham khảo tài liệu 'health safety and environment_5', kỹ thuật - công nghệ, điện - điện tử phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Confined Spaces 323 helmet safety glasses blast suit gloves supplied air respirator deadmen handle safety shoes breathing air tube assembly flow connector respirator hose Fig. Personnel protective equipment Clemco Inc. Washington Is the space large enough that the operator can place a part or whole of his body into it Does it have limited entry and exits Is it designed to work continuously Training and education are the major methods to reduce risks if work is performed in confined spaces. OSHRA 29 CFR states The employer shall provide training so that all employees whose work is regulated by this section acquire the understanding knowledge and skills necessary for the safe performance of the duties assigned under this section Adequate training must be delivered when permit-required confined spaces are encountered and for all of the duties performed 324 7 Health Safety and Environment Fig. Blast cleaning in a confined space Photograph Muehlhan AG Hamburg in and around a confined space. Further information and recommendations can be found in IACS 2003 . Soil Contamination Soil contamination due to heavy metals is another health and environmental issue associated with blast cleaning. Lange 2002 performed a systematic investigation into the contamination of soil during the removal of lead-based paint from a steel tank with blast cleaning. The lead concentration in the paint varied between and wt. . Soil samples were collected in certain distances from the tank before during Waste Disposal 325 distance from source tank in m Fig. Effect of stand-off distance on lead concentration in soil at a blast cleaning site Lange 2002 and after the blast cleaning operation. Data from this study are plotted in Fig. . Concentration of lead in the soil generally decreased through distance from the tank. The author also found notable statistical differences among the samples collected during the different periods. The lead content was .

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