Upon submission to the department of an application for a permit necessary for an activity in a contributing area classified as GA1 or GAA, which is a potential contamination source under N.H. Rev. Stat. § 485-C:7, the state shall notify the local governing body, as defined in N.H. Rev. Stat. § 672:6, as well as the local entity, if known, of the filing of the application and shall suspend action on the application for 30 days to allow time for receipt of recommendations from the local entity. For any application required by law to be acted upon within a certain prescribed time, the time shall be extended automatically by 30 days to allow for comment. The department shall proceed to act upon the application at the end of 30 days, even if no comments have been received. If the local entity submits recommendations to the department on the application, the department shall make written findings explaining any deviation from such recommendations. This section shall not apply to applications to construct domestic septic systems, provided that the system has an aggregate capacity of less than 20,000 gallons per day on one lot.