Any person served with an order to repair may, at any time prior to the date specified in the order for the work to be commenced, file a written appeal to the Board of Public Works, upon such form as the Board shall prescribe, for a review of any of the requirements of said order. The filing of such an appeal shall stay all requirements of the order until a determination of the matter is rendered by the Board. The Board shall promptly set a date for the hearing of the appeal and shall at least 10 days prior thereto, serve and post notice of the date thereof in the manner, prescribed by Sections 65.05, 65.06 and 65.07. The Board shall make such investigations as it deems necessary and shall upon the date set for hearing of the appeal from the order to repair, hear and consider evidence offered by any interested person. Thereafter, but in no event later than 45 days from receipt of the appeal, the Board shall make written findings of fact as to whether or not the private street is a hazardous private street within the terms of this division, and may affirm, change or modify any of the requirements of the repair order.