NICNAS provided technical expertise to the EPHC Standards Setting Working Group in producing a report titled Ambient air quality standards setting an approach to health based hazard assessment. NICNAS also contributed to a review by the NDPSC of the definition of the term derivative for scheduling purposes. In addition, two chemical submissions to NDPSC on MMA and EMA were made, and we also provided technical assistance to OASCC in terms of hazard reviews and proposed exposure standards on three chemicals.