(a) With respect to the modifications of nonmajor stationary sources, or modifications which are not major modifications to existing major stationary sources, the following activities are authorized in advance of permit issuance. Any authorized activities undertaken by or on behalf of the permit applicant prior to the issuance of a final permitting action by the secretary are undertaken at the permit applicant's own risk and with the knowledge that the application for a permit or permit modification may be denied:
(1) Receiving or storing on-site or off-site any equipment or supplies which make up in part or in whole an emission unit or any support equipment, facilities, building or structure.