The EA included the site on a list of illegal dumps measuring more than 20,000 tonnes in England after a request from the House of Lords’ Environment and Climate Change Committee.
Oak Tree Farm lies on the border between the Royal Borough of Windsor and Maidenhead and Bracknell Forest Council areas, with land in both.
An EA spokesperson said: “Specialist environmental crime officers are investigating the site in Binfield, and will not hesitate to take legal action against those responsible.
“Anyone with information about this operation, or with suspicions about waste crime elsewhere, should contact the Environment Agency’s 24-hour incident hotline.”
Steinborn-Busse, who is also one of the owners of Bracknell Cricket Club, bought the farm in October 2024 for £3.8m.
“This is an engineering project. It’s material brought onto this site that has a defined end use and that is to build and to landscape,” he said.
“[The EA’s 32,000 tonnes’ statement] is an assumption and it shouldn’t be relied upon. It’s a guesstimate.
“How on earth can a guesstimate be put into the public domain that is going to be picked up by every single news source? How can you do that?”
