(a) Persons identified under Sec. 312.1(b) must conduct the inquiries listed in paragraphs (a)(1) through (a)(4) below and may provide the information associated with such inquiries to the environmental professional responsible for conducting the activities listed in Sec. 312.21:
(1) As required by Sec. 312.25 and if not otherwise obtained by the environmental professional, environmental cleanup liens against the subject property that are filed or recorded under federal, tribal, state, or local law;
(2) As required by Sec. 312.28, specialized knowledge or experience of the person identified in Sec. 312.1(b);
(3) As required by Sec. 312.29, the relationship of the purchase price to the fair market value of the subject property, if the property was not contaminated; and
(4) As required by Sec. 312.30, and if not otherwise obtained by the environmental professional, commonly known or reasonably ascertainable information about the subject property.