These rules, regulations and standards shall be considered the minimum requirements for the protection of the public health, safety and welfare of the citizens of the Town of Newton. Any action taken by the council and the planning board under the terms of this chapter shall give primary consideration to the abovementioned matters and to the welfare of the entire community. However, if the subdivider or his agent can clearly demonstrate that, because of peculiar conditions pertaining to his land, the literal enforcement of one or more of these regulations is impracticable or will exact undue hardship, the planning board and the council may permit such variance or variances as may be reasonable and within the general purpose and intent of the rules, regulations, and standards established by this chapter.