W. Va. Code § 22-5-11a
(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:
(3) The following sources are ineligible for submission of an application for permission to commence construction in advance of permit issuance:
(4)
(3) The nature of the sources and equipment associated with
such alteration, expansion, modification or new emission unit;
(6) The alteration or expansion will result in the same or substantially similar emissions as the facility already permitted.
If the secretary finds that all of the conditions have been satisfied, the notice issued by the secretary shall state that construction of the alteration, expansion, modification or new emission unit in advance of permit issuance may begin immediately. If the secretary finds that one or more of the conditions has not been met, the notice shall state that the requested construction, alteration, expansion, modification or new emission unit may not begin prior to issuance of a new or modified permit.