The scope of the standard parctice, is to detect isocyanates on surfaces, and skin. To give guidance on how to sample a variety of surfaces and interpret results of colorimetric change on wipe samplers. This go/no-go approach, is necessary to guide decontamination efforts and evaluate preventative measures employed in minimizing stray transportation of isocyanates from regulated areas.
Surface and skin wipe technology has been utilized for many years to evaluate the degree of contamination on surfaces and skin. Several standards exist in ASTM for the evaluation of metal dusts. The proposed standard is going to address organic contamination specifically iso-cyanates. Recently OSHA has implemented the use of surface & skin wipes as a hazard assessment tool for isocyanates. After many years of focusing to control airborne isocyanates, OSHAs attention has turned to assessing the hazard posed by skin absorption of isocyanates. After several years of work, it has been discovered that workers are adequately protected against skin absorption, by wearing appropriate PPE, while working within a regulated area. The problem is that fugitive contamination, finds itself outside of the regulated area. Personnel outside the regulated area, no longer wear PPE, and because of the isocyanates ability to be absorbed through the skin, personnel, inadvertently are exposed to the very substances that they have been so careful to avoid while in the regulated environment. To help detect the presence of isocyanates on surfaces, chemical impregnated wipes that change color when reacted with isocyanates have been developed. These wipes are able to detect as little as 5 micrograms of isocyanates. Armed with this tool, more effective hazard assessment can be made and evaluate the way fugitive contaminants escape the regulated area. The collected information will identify to users, which work surfaces are contaminated and can take decontamination steps. The standard will help standardize the use and interpretation of hazard assessment measures, using such color indicating wipes. OSHA has begun to use such technology in the field and cite users for not controlling stray isocyanates from escaping regulated areas. potential users are:- all manufacturers producing or using isocyanates. Examples in place spray foam, truck bed liner, paint shops etc.
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Draft Under Development