The admission into the public sanitary sewers of any waters or wastes having: (a) a 5-day biochemical oxygen demand greater than 300 parts per million, or (b) containing more than 350 parts per million suspended solids, or (c) having an average daily flow greater than 2 per cent of the average daily sewage flow of the city, shall be subject to the review and approval of the DPS. Where necessary, in the opinion of the DPS, the owner shall provide, at his expense, such preliminary treatment as may be necessary to (a) reduce the biochemical oxygen demand to 300 parts per million and the suspended solids to 350 parts per million by weight, or (b) control the quantities and rates of discharge of such water or wastes. Plans, specifications and any other pertinent information relating to proposed preliminary treatment facilities shall be submitted for the approval of the DPS and of the appropriate agency of the State of Michigan and no construction of such facilities shall be commenced until the said approvals are obtained in writing. Where preliminary treatment facilities are provided for any wastes or waters, they shall be maintained continuously in satisfactory and effective operation by the owner at his expense.
(Ord. 542, sec. viii)