In addition to any specific requirements elsewhere in this bylaw, or where no specific restrictions are made applicable to a use allowed by special permit, the SPGA may grant a special permit, but only upon its written determination that the proposed use will not have adverse effects which overbalance its beneficial effects on either the neighborhood or the Town, in view of the particular characteristics of the site. The SPGA may require the applicant to pay the costs of hiring independent experts chosen by the SPGA to review any information required by the board. The determination shall indicate that the proposed use will be in harmony with the general purpose and intent of this bylaw and shall include, but not be limited to, consideration of each of the following:
(a) Adequacy of the site in terms of size for the proposed uses;
(b) Suitability of the site for the proposed use;
(c) Impact on traffic flow and safety;
(d) Impact on neighborhood visual character, including views and vistas;
(e) Adequacy of method of sewage disposal, source of water and drainage; and
(f) Adequacy of utilities and other public services.
(g) Impact on ground and surface water quality and other environmental and natural resource considerations.