The owner or operator must comply with conditions specified in the facility permit that are designed to ensure that hazardous constituents under Sec. 264.93 detected in the ground water from a regulated unit do not exceed the concentration limits under Sec. 264.94 in the uppermost aquifer underlying the waste management area beyond the point of compliance under Sec. 264.95 during the compliance period under Sec. 264.96. The Regional Administrator will establish this ground-water protection standard in the facility permit when hazardous constituents have been detected in the ground water. [53 FR 39728, Oct. 11, 1988]