Recommendation for an Air Quality Standard for 1,3-Butadiene

27. The Panel recommend an Air Quality Standard for 1,3-butadiene in the United Kingdom of 1 ppb measured as a running annual average. We also recommend that this Standard, and the need for a target Standard, be reviewed after a period of, at most, five years in the light of any additional human data and of the experience of improved pollution control. In the interim the Panel recommend that, as a precautionary measure, the Government's programme of air pollution controls should aim to ensure that, at any one site, the Standard is not exceeded and that there is an overall decline in concentrations.
28. These recommendations are intended to reduce the cumulative lifetime exposure of the United Kingdom population to 1,3-butadiene. It is intended that the techniques for monitoring the Standard be consistent with those of the Department of the Environment's Enhanced Urban Network.