The licensee shall use a hose to discharge materials into the city sewage system and discharge shall be in a clean and inoffensive manner satisfactory to the sewer superintendent. Equipment and methods used by the licensee to discharge such materials shall be subject to inspection by and/or approval by the sewer superintendent except that the sewer superintendent may waive such inspection upon submittal, by the applicant, of a valid registration and inspection certificate issued by the Snohomish County health district. Failure to comply with the requirements of the sewer superintendent with regard to equipment and methods of discharge shall be grounds for revocation of the license. (Ord. 801-81 § 9, 1981.)