Environmentally relevant activities are carried out as a
"single integrated operation" if—
(a) the activities are carried out under the day-to-day management of a single responsible individual, for example, a site or operations manager; and
(b) the activities are operationally interrelated; and
(c) the activities are, or will be, carried out at 1 or more places; and
(d) the places where the activities are carried out are separated by distances short enough to make feasible the integrated day-to-day management of the activities.