Schedule AIR QUALITY OBJECTIVES
TABLE
| Substance | Air Quality Objective levels |
|---|---|
| Benzene | 5 ppb or less, when expressed as a running annual mean |
| 1,3-Butadiene | 1 ppb or less, when expressed as a running annual mean |
| Carbon Monoxide | 10 ppm or less, when expressed as a running 8 hour mean |
| Lead | 0.5 micrograms per cubic metre or less, when expressed as an annual mean |
| Nitrogen Dioxide | 150 ppb or less, when expressed as an hourly mean, and 21 ppb or less, when expressed as an annual mean |
| PM10 | 50 micrograms per cubic metre or less, when expressed as the 99th percentile of daily maximum running 24 hour means |
| Sulphur Dioxide | 100 ppb or less, when expressed as the 99.9th percentile of 15 minute means |