A supplemental contract may be executed with the City for handling sewage or industrial wastes of higher biochemical oxygen demand or toxic wastes than permitted by Section 941.01 after an engineering study has been made, and it has been determined that sewage treatment plant facilities are adequate to properly treat such wastes. Pretreatment by screening or neutralizing with chemicals will be required prior to discharging such wastes into the system.
(Ord. 508. Passed 1-10-57.)