5U.K.For section 1145 substitute—
(1)For the purposes of this Part land is in a contaminated state if (and only if), because of something in, on or under the land, the land is in a condition such that—
(a)relevant harm is being caused, or
(b)there is a serious possibility that relevant harm will be caused.
(2)But land is not in a contaminated state by reason of the presence in, on or under it of—
(a)living organisms or decaying matter deriving from living organisms, air or water, or
(b)anything present otherwise than as a result of industrial activity.
(3)The Treasury may by order specify circumstances in which subsection (2) is not to apply to the extent specified in the order; and an order under this subsection may contain incidental, supplemental, consequential and transitional provision and savings.
(4)In this section “relevant harm” means—
(a)death of living organisms or significant injury or damage to living organisms,
(b)significant pollution of controlled waters,
(c)a significant adverse impact on the ecosystem, or
(d)structural or other significant damage to buildings or other structures or interference with buildings or other structures that significantly compromises their use.
For the purposes of this Part land is in a derelict state if (and only if) the land—
(a)is not in productive use, and
(b)cannot be put into productive use without the removal of buildings or other structures.
(1)A nuclear site is not land in a contaminated state or land in a derelict state for the purposes of this Part.
(2)“Nuclear site” means—
(a)any site in respect of which a nuclear site licence is for the time being in force, or
(b)any site in respect of which, after the revocation or surrender of a nuclear site licence, the period of responsibility of the licensee has not yet come to an end.
(3)In subsection (2) “nuclear site licence”, “licensee” and “period of responsibility” have the same meaning as in the Nuclear Installations Act 1965.”