Where the person or establishment purchases all of its water from the City and discharges all of it as wastewater to the sewer system, the volume of water purchased shall be used as a measure of the quantity of industrial wastewater discharged. Where the person or establishment purchases its water from the City and discharges only a part of it to the sewer system:an allowance for water not put into the sewer system shall be made in computing wastewater flow; or flow shall be measured separately before it discharges to the sewer system. The person or establishment shall provide, at its own expense, metering facilities as required to indicate accurately to the satisfaction of the City:the amount of water claimed as a credit; or the flow discharging to the sewer system. The Director shall determine which method is acceptable. Whenever a computation is used to determine credit, the industrial user shall submit the data to the Director. Failure to submit the required data within the period specified by the Director will result in the forfeiture of the credit. Whenever a person or establishment using a private water supply discharges wastewater to the sewer system, either sanitary or (where allowed) storm, the flow will be based upon:metered use of water in the establishment or in that portion of the establishment discharging wastewater to the public sewer; or metered flow discharged to the sewer system. City Code, 1976/83, art. 25, §8(c) Ord. 75-914 Ord. 84-129 Ord. 91-775