17.—(1) Except as otherwise provided by this regulation, a regulator may not authorise the operation of more than one regulated facility under a single environmental permit.
(2) The regulator may authorise, under a single environmental permit, the operation by the same operator—
(a)of more than one mobile plant;
(b)of more than one standard facility (other than a standard facility to which the IPPC Directive applies); or
(c)subject to paragraph (3) and (4), of more than one regulated facility on the same site.
(3) If one of the regulated facilities mentioned in paragraph (2)(c) is a radioactive substances activity described in paragraph 5(5) of Part 2 of Schedule 23, the permit may authorise the operation of that regulated facility on more than one site.
(4) If a groundwater activity is carried on as part of a radioactive substances activity—
(a)the regulator must authorise the carrying on of the groundwater activity under the same environmental permit that authorises the carrying on of the radioactive substances activity; and
(b)a separate permit must not be granted in relation to the groundwater activity.