HC Deb 26 July 1966 vol 732 cc223-4W
Mr. Brian Harrison

asked the Minister of Housing and Local Government why contact stabilisation treatment plants are only approved for loan sanction on a five-year basis, when extended aeration sewerage treatment plants are granted loan sanction on a fifteen-year basis.

Mr. MacColl

Because contact stabilisation is a new process and its efficiency and reliability cannot yet be assessed.