(a) Each person who discharges industrial wastes into a City sewer shall, within ninety days of receipt of official notice by the Approving Authority, prepare and file with the Appoving Authority a report that shall include pertinent data relating to the quantity and characteristics of the wastes discharged to the public wastewater treatment facilities. Similarly, each person desiring to make a new connection to the City sewer for the purpose of discharging industrial wastes shall prepare and file with the Approving Authority a report that shall include actual or predicted data relative to the quantity and characteristics of the waste to be discharged.
(b) When it can be demonstrated that circumstances exist which would create an unreasonable burden on the person to comply with the above time schedule, a request for extension of time may be presented for consideration by the Approving Authority who may, if warranted, issue an extension of time.
(c) Each person discharging industrial wastes into a public sewer shall construct and maintain one or more control manholes or access points to facilitate observation, measurement and sampling of his wastes, including domestic sewage.
(1) Control manholes or access facilities shall be located and built in a manner acceptable to the Approving Authority. If measuring devices are to be permanently installed, they shall be of a type acceptable to the Approving Authority.
(2) Control manholes, access facilities and related equipment shall be installed by the person discharging the waste, at his expense, and shall be maintained by such person so as to be in safe condition, accessible, and in proper operating condition at all times.
(3) Plans for the installation of the control manhole or access facility and related equipment shall be approved by the Approving Authority prior to the beginning of construction.
(d) The volume of flow used for computing industrial waste surcharges shall be the metered water consumption of the person as shown in the record of meter readings maintained by the Twin City Water and Sewer Department. If the person discharging industrial wastes into the public sewers procures any part, or all, of his water from sources other than the Twin Cities Water Department, all or part of which is discharged into the City Sewers, the person shall install and maintain, at his expense, water meters of a type approved by the Approving Authority for the purpose of determining the volume of water obtained from these other sources.
(e) In the event that a person discharging industrial wastes into the City sewers produces evidence satisfactory to the Approving Authority that the total annual volume of water used, for all purposes, does not reach the City sewer, then the determination of the water consumption to be used in computing the waste volume discharged into the public sewer may be made a matter of agreement between the Approving Authority and the person.
(f) Devices for measuring the volume of waste discharged to the City sewer may be required by the Approving Authority if these volumes can not otherwise be determined from the metered water consumption records of the Twin City Water and Sewer Department. Metering devices for determining the volume of waste shall be installed, owned and maintained by the person.
Following approval and installation, such meters may not be removed without the consent of the Approving Authority.
(g) Industrial wastes discharged into the City sewers shall be subject to periodic inspection and a determination of character and concentration of such wastes. The determinations shall be made as often as may be deemed necessary by the Approving Authority.
Samples shall be collected in such a manner as to be representative of the compostion of the wastes. The sampling may be accomplished either manually or by the use of mechanical equipment acceptable to the Approving Authority. Installation, operation and maintenance of the sampling facilities shall be the responsibility of the person discharging the waste and shall be subject to the approval of the Approving Authority. Access to sampling locations shall be granted to the Approving Authority or his duly authorized representatives at all times. Every care shall be exercised in the collection of samples to insure their preservation in a state comparable to that at the time the sample was taken.
(h) Laboratory procedures used in the examination of industrial wastes shall be those set forth in "Standard Methods", Section 144. However, alternate methods for certain analysis of industrial wastes may be used subject to mutual agreement between the Approving Authority and the person. Determination of the character and concentration of the industrial wastes shall be made by the person discharging them, or his agent, as designated by the Approving Authority. The City may also make its own analysis on the wastes and these determinations shall be binding as a basis for charges.
(Ord. 1350. Passed 11-16-78.)