No special permit shall be granted by the Board of Trustees except upon adequate assurance by the applicant that, throughout the life of the use so permitted, no premises shall be used in such a manner as to cause the emanation therefrom of offensive or noxious odors, vapors, fumes, glare, radiation or noise and that the use of said premises shall not cause injury, offense, annoyance or disturbance to any of the surrounding properties or their owners and occupants; nor shall any building, structure or accessory building on the premises be used for the manufacture, display or sale of any equipment, goods, wares or merchandise of any nature whatsoever or for any other commercial or semicommercial use whatsoever. Storage shall be permitted only if incidental to the principal permitted use of the premises.