Of these, 1,320 are plant (considered as 'non road mobile machinery') and 330 are road vehicles. The figures exclude road haulage vehicles delivering construction materials to site.
The ODA has a number of measures in place to address the effects of the works on air quality. These measures include the use of ultra low sulphur diesel in all plant, laying hard surface haul roads around site, using dust suppressants and managing the timing and location of works to minimise air quality impacts. Air quality monitoring reports are published monthly on the London 2012 website.
All commercial road vehicles and construction plant used on the Olympic Park, including stationary plant, must comply with any legislative requirements. The ODA does not have data for road vehicles that are not permanently based on the Olympic Park, and the ODA has confirmed that the permanent machinery (non road mobile machinery) do not have filters fitted. However, a study is being undertaken currently that will consider the case for fitting of carbon particulate filters as well as establishing cost effectiveness of installation against other measures. The study is due to be completed in February 2010.
New EU legislation will require that emissions of particulate pollutants are reduced in new machinery across industry. One of the methods of reducing particulates could be to introduce filters. This legislation is being introduced in a phased approach dependent on engine size over the next four years.
All commercial road vehicles and construction plant used on Olympics venues outside the Park must comply with the same legislative requirements; however the ODA does not hold statistics of similar depth for these venues.