(A) The admission into the public sewers of any waters or wastes having:
(1) A five-day B.O.D. greater than 300 parts per million by weight; or
(2) Containing more than 350 parts per million by weight of suspended solids; or
(3) Containing any quantity of substances having the characteristics described in § 51.05; or
(4) Having an average daily flow greater than two percent (2%) of the average daily sewage flow of the city, shall be subject to the review and approval of the Service Director.
(B) Where necessary in the opinion of the Service Director, the owner shall provide at his expense such preliminary treatment as may be necessary to:
(1) Reduce the B.O.D. to 300 parts per million and the suspended solids to 350 parts per million by weight; or
(2) Reduce objectionable characteristics or constituents to within the maximum limits provided for in § 51.05; or
(3) Control the quantities and rates of discharge of such waters or wastes.
(C) Plans, specifications and other pertinent information relating to proposed preliminary treatment facilities shall be submitted for the approval of the Service Director and of the State Department of Health and no construction of such facilities shall be commenced until these approvals are obtained in writing.
(`59 Code, § 923.07)