Comment-21551-Robert Campbell

I am glad to see that OEHHA has chosen to establish NSRLs for the exposure to airborne titanium dioxide. While the proposed amended text for the regulation is clear in its application to "respirable" site TiO2 particles, it would be useful to the regulated community for OEHHA to reaffirm that the Prop 65 listing does not apply to particles other than those in the respirable range. In other words that those particles falling into the inhalable range (>10um but <100um) are not subject to the Proposition 65 notification requirements.