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 Borough. Any action taken by the Planning Board under the terms of this chapter shall give primary consideration to the above-mentioned 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 impractical or will exact undue hardship, the Planning Board 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. In any such case, the Planning Board shall make written findings of fact and conclusions of law supporting its action.