"The duchy is administered on behalf of the sovereign by the chancellor of the duchy of Lancaster, a government minister appointed by the sovereign on the advice of the prime minister, and by the clerk of the council.[17] The former position is sometimes held by a cabinet minister, but is always a ministerial post. For at least the last two centuries the duchy has been run by a deputy; the chancellor has rarely had any significant duties pertaining to its management but is available as a minister without portfolio and is answerable to Parliament for the effective running of the estate.[18][19][20][21]
The monarch derives the privy purse from the revenues of the duchy. The surplus for the year ended 31 March 2025 was £24.4 million and the duchy was valued at £678.7 million.[22] Its land holdings are not to be confused with the Crown Estate, whose revenues have been handed to the Treasury since the 18th century in exchange for the receipt of a yearly payment.
The Duchy Council's primary officers carrying out the estate's day-to-day duties are the clerk of the council of the duchy of Lancaster (the chief executive officer), the chairman of the council, and the chief finance officer.[23] The chancellor is responsible for the appointment of the steward and the barmaster of the barmote courts on behalf of the sovereign in right of the duchy.[24]"
From Wikipedia. I looked it up to confirm the structure. Toxic waste should be removed, obviously.
But why is the responsibility for this dump existing being placed on the King?