The company appeared at Dumbarton sheriff court on 16 November to admit to two charges of causing silt-laden water to enter controlled waters, contrary to section 30F(1) of the Control of Pollution Act 1974. Gleeson was fined a total of £3,000 for both offences.
Although the company received advice from the Scottish Environment Protection Agency on how to prevent pollution from run-off from the site, reports of discoloured water in local watercourses in December 2004 and January 2005 were traced to the construction site.
Gleeson is a main contractor building the treatment works at Milngavie. The works will improve drinking water treatment and increase protection against cryptosporidium for 700,000 residents in the north Glasgow area.