Protection Against Pharmaceutical Processes That Produce Dust & Potent Compounds Pharmaceutical plants are generally a safe environment to work in. However, with regards to pharmaceutical dusts/compounds the risks are much more severe due to the nature of the potent materials used in products. This includes compounds such as, toxic or allergenic properties of the compound as it relates to personnel exposure and the explosion properties of the compound. Our team of Camfil experts understand, the toxilogical properties of the materials, reviewing the Occupational Exposure Limit (OEL) and performing a risk-based exposure evaluation to determine the methods for proper control. In most cases, Camfil APC recommends a HEPA secondary polishing system. With HEPA backup systems after the dust collector, recirculation of the filter air back into the HVAC system is possible. This can significantly reduce energy costs while providing the necessary level of filtration for discharge air required by the EPA.