In interpreting and applying the provisions of this chapter, they shall be held to be the minimum requirements for the promotion of the purposes of this chapter as set forth in § 28-2. Officials charged with the interpretation and enforcement of this chapter shall be mindful of the general intent as expressed in this chapter and shall so interpret and enforce this chapter so that no substantial detriment to the public good shall result and so that decisions shall not substantially impair the intent and purpose of the Zone Plan and this chapter.