N.Y.C. Charter § 828: Section 828. Right of entry.

The commissioner, officers and employees of the department may, in accordance with law, enter upon public or private property for the purpose of making surveys, borings or other investigations necessary for the exercise of the powers or the performance of the duties of the commissioner and the department. Refusal to permit such entry shall be a misdemeanor punishable by not more than thirty days' imprisonment or by a fine of not more than fifty dollars, or both.