In cases of doubt, uncertainty or a dispute as to the exact limits of the floodplain, the floodway or flood hazard area in a proposed development, the applicant's engineer shall submit all of the appropriate floodplain data, topography, hydrology, hydrolics and any other information required by the Planning Board. After receipt of the complete data, the Planning Board Engineer, upon the application and with the consent of the landowner, shall determine the precise location of a floodplain, floodway or flood hazard area limit by close inspection, field survey or other appropriate method and cause the same to be marked on the ground, notifying the landowner, the Building Inspector and the Planning Board of the results thereof. The cost of such engineering shall be borne by the applicant.