The provisions of Subsection d1 hereof shall not apply to the incidental filling of low areas not regulated by Section 143 with clean, odor free, nonputrescible inorganic waste material by a property owner if, in the opinion of the Township Committee, no drainage problem with result. Applications for fill permits under this subsection need not be accompanied by a plan prepared by a New Jersey licensed professional engineer. Filling shall be done on land owned by the applicant and shall be covered with clean earth or, in the case of a driveway, with stones or gravel. The filling shall not excessively exceed the grade of the surrounding area and shall cause no drainage problem. If, in the opinion of the Township Committee, a drainage problem may arise from the filling operation, the provisions of Subsection d1 hereof shall apply.