The Board of Trustees, in considering such application and after public hearing, may issue permits for such uses for a limited period of time or otherwise, subject to such conditions and safeguards as shall be deemed appropriate, when, in its opinion, it shall find that such proposed use and improvement will conform to the general character of the neighborhood in which the property to be used is located and that the public health, morals, safety and general welfare of such neighborhood will be secured and will be in accordance with the comprehensive plan and the provisions as set forth in this chapter to lessen congestion in the streets, to secure safety from fire, panic or other danger, to prevent overcrowding of land, to avoid undue concentration of population, to safeguard the adequate provision of water, sewage disposal, parks and other public requirements and to protect and secure the nature and character of the existing neighborhood and the values of the property therein.