Pennsylvania Statutes Title 35 P.S. Health and Safety § 7130.319. Rebuttable presumption

(a) Liability of operator.--It shall be presumed as a rebuttable presumption of law that the operator of a regional facility is liable and responsible for all damages and radioactive contamination within three miles of the boundary of the regional facility without proof of fault, negligence or causation.

(b) Defenses.--In order to rebut the presumption of liability, the operator must affirmatively prove by clear and convincing evidence that the operator did not contribute to the damage, or, in the case of radioactive contamination, one of the following three defenses: