Upon the failure, neglect, or refusal of any owner or agent so notified to properly dispose of litter dangerous to the public health, safety, or welfare within 10 days after receipt of written notice provided for in BMC 10.60.220, or within 10 days after the date of such notice in the event the same is returned to the city because of post office inability to make delivery thereof, provided the same was properly addressed to the last known address of such owner or agent, the city is authorized and empowered to pay for the disposing of such litter or to order its disposal by the city or others. [Ord. 8573 § 15(V)(2), 1977].