More images from the Sweepfast running track cleaning service are available to view at http://www.flickr.com/photos/sweepfast/sets/72157629768718224/ . These show the Hoerger KBR system working at Gateshead International Stadium last year. The track was particularly contaminated from footfall off the natural grass football pitch in the infield across the track to the changing rooms.

It took about 3 days to clean this effectively but the results were clearly impressive, as you can see below