The arrest was carried out today (Wednesday, August 5) during a joint operation involving the Environment Agency, Cornwall Council, and Devon and Cornwall Police.
Officers secured the arrest in connection with alleged environmental offences.
The man has not been formally charged.
The Environment Agency said the operation forms part of a wider investigation into activities at a site containing around 50,000 tonnes of predominantly inert construction waste.
Cornwall Council is also investigating offences at a separate site.
Tim de Winton, area environment manager at the Environment Agency, said: “Our teams have been working tirelessly in our investigation into activities at this site.
“This arrest is a vital step in collecting new evidence and progressing matters further.
“We will take tough action against those who flout the laws designed to protect communities and the environment.”
The Environment Agency said it had previously taken action to halt large-scale waste deposits at a Camborne site, including issuing Illegal Waste Stop Letters to the landowner, hauliers, and operator.
Officials said the arrest demonstrates their commitment to tackling waste crime through national enforcement measures aimed at protecting communities and the environment.
Anyone with information relating to environmental offences can contact the Environment Agency via its incident hotline or report information anonymously through Crimestoppers.
