Variances to the regulation may be granted by
the Board of Health after a hearing during which the applicant proves
that the installation of on-site sewage disposal system will not have
a significant adverse effect on surface or subsurface public or private
water resources. The Board in granting variances will consider if
strict interpretation of this regulation would do manifest injustice
to the applicant; however, the applicant must demonstrate that the
same degree of environmental protection required by this regulation
can be achieved by other means.