The study provided a characterization of the potential for cancer risk arising from exposure to respirable crystalline silica, as released during sanding or painting activities involving interior flat latex paint, the NPCA said.
In the study, exposure was estimated for two types of hypothetical subjects — homeowners (who are assumed to sand paint for a total of 10 hours per year), and professional painters (assumed to sand for a total duration of 500 hours per year and who also paint using an aerosol sprayer for a total duration of 405 hours per year). The study used paint containing three different concentrations of crystalline silica. Based on a comparison of the estimated exposures to toxicological data, the report concluded that there would be no demonstrable lifetime carcinogenic risk to either type of hypothetical subjects.
The NPCA said its staff is evaluating the final report, which is not currently available for general distribution. NPCA members can obtain more information from Skip Edwards at firstname.lastname@example.org.