Plat or survey prepared by a registered land surveyor showing the location, boundaries, dimensions, elevations, uses and size of the following: subject site; existing and proposed structure; existing and proposed easements, streets, and other public ways; off-street parking, loading areas and driveways; existing highway access restrictions; and existing and proposed street, side, and rear yards. In addition, the plat or survey shall show the location, elevation and use of any abutting lands and their structures within 40 feet of the subject site and shall show the center line of abutting highways and the high-water mark of any abutting watercourse. The plat or survey shall also show any private water or on-site sewage disposal system to be installed, including a sketch showing surveyed location of wells, streams, lakes, buildings, privies and septic tank systems within 100 feet of the proposed sewage disposal site. In case of simple extensions, alterations, repairs or restoration, the Building Inspector may waive any or all of the requirements hereunder and accept in lieu thereof a simple sketch by the applicant with explanatory data found sufficient by the Building Inspector to adequately identify and explain the proposed construction and use.