Washing, safety problems

Some safety engineers have become obsessed with fears of safety problems with hot asphalt, although very few injuries or accidents have been traceable to it over the several centuries that it has been used industrially. Asa result, there have been many efforts to substitute cold asphalt putties for hot asphalt as a membrane material. These materials and their limitations have been discussed above. As a membrane for floor installations, such putties are often usable providing they are never subject to a standing liquid head, but less frequently for trenches and pits. Remember, if asphalt emulsions are put in service before all the water has dried out of them, they can reemulsify and may be washed out. 

Separation of NG from the spent acid Alkaline washing of NG Technical data ofBiazzi method Safety measures Injector nitration process Safety problems... 

Wash K, Abaidoo KJR, Villaume JE. 1978. A literature review-problem definition studies on selected toxic chemicals. Vol. 2 Occupational health and safety aspects of phosphorus smoke compounds. ADA056019. 

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