It is unlawful for any person to break, block, damage, destroy, uncover, deface or tamper with any property, equipment or appliance constituting a part of the City sewer system. It is unlawful to trespass upon the property of the City and interfere in any manner with the operation of the City sewer system, or the property, equipment, manholes, piping or appliances of the wastewater collection system and treatment facilities. No person shall open any public sewer manhole without the permission of the Public Works Department, nor shall any person deposit any type of refuse into the sewer manholes. (1952 Code § 8-11-10.01)