87. During the drilling, the authorization holder must make sure that(1) the stratigraphic survey is drilled so as to never intersect an existing wellbore;
(2) the drilling fluids, drilling fluid system and associated monitoring equipment are designed, installed, used or maintained to provide an effective barrier against formation pressure and to allow for an adequate characterization of the geological formations investigated;
(3) the indicators and alarms associated with the monitoring equipment are installed on the drilling rig to alert onsite personnel; and
(4) adequate procedures, facilities and equipment are in place and are utilized to minimize the risk of loss of stratigraphic survey control in the event of lost circulation, fluid kicks or blowout.