(A) Whenever an excavation or fill within or outside a public place has caused or contributed to a condition that appears to substantially impair the lateral support of the adjoining street or public place, or endangers the public, an adjoining public place, street utilities, or city property, the Director of Public Works may direct the contractor making such excavation of fill and/or owner of the property upon which such excavation or fill is being made, at his own expense, to take action to protect the public, adjacent public places, city property, and street utilities.
(B) In the event that the owner or contractor fails or refuses to take the action directed promptly, or fails to fully comply with such directions given by the Director of Public Works, or if emergency conditions exist requiring immediate action, the Director of Public Works may enter upon the property and take such action as he deems necessary to protect the public, the adjacent streets, or street utilities or to maintain the lateral support thereof, including placing of temporary shoring, backfilling, alteration of drainage patterns and any other action reasonably necessary to decrease the possibility or extent of earth movement, or regarded as necessary safety precautions; and the owner and/or contractor shall be liable to the city for the costs thereof.