Within sixty days after the receipt of a complete permit application, the Commissioner of Public Health shall issue a written decision granting or denying the permit and setting forth the reasons for his decision, provided, if the commissioner has utilized the services of a consultant or a professional review team as provided for by section 25-37d, such consultant or review team shall submit to said commissioner, within ninety days of his receipt of such application, a written report of its findings, and said commissioner shall issue his decision within one hundred twenty days of his receipt of such application or within one hundred sixty-five days of the initial submission of the application. The commissioner shall forward a copy of his decision to the applicant, the Public Utilities Regulatory Authority, the Department of Energy and Environmental Protection and the chief executive officer of the town in which the land is located. If no decision is issued within one hundred twenty days after receipt of a complete application or within one hundred sixty-five days of the initial submission of the application, the applicant may submit a written request to the commissioner to issue the permit. If the commissioner does not issue a decision within forty-five days after the submission of such a request, the permit shall be deemed to have been granted.