The design of the system and its discharge point, and the size of the entire contiguous parcel on which the system or systems is located, will ensure that ground water exiting from the entire contiguous parcel or entering a surface body of water will not exceed two parts per million nitrate/nitrogen, calculated pursuant to the Pinelands dilution model dated December, 1993, as amended, subject to the provisions of paragraph a4(c) below. The entire contiguous parcel may include any contiguous lands to be dedicated as open space as part of the proposed development but may not include previously dedicated road rights-of-way or any contiguous lands that have been deed restricted pursuant to subsection 26-75.9 (Density Transfer Program) or N.J.A.C. 7:50-5.47;