The monthly sewer service fee assessed and levied upon the occupants of premises served by the sewer system from the sewer service rates as provided by this article shall be based on the following:
A. Residential premises - The number of separate dwelling units on the premises on the first day of the month in which the sewer service fee is assessed and levied;
B. Nonresidential premises - The average monthly volume of wastewater discharged from such premises as determined by the director in the following manner:
1. Where the director finds that the premises were connected to the sewer system prior to the first day of the preceding month of December, finds that there has been no significant change in the type or intensity of the use of the premises on or after the first day of the preceding month of December, and finds that substantially all of the water used on the premises is supplied by a private water company and separately metered, then the director shall determine the average monthly volume of wastewater discharged to the sewer system from the premises on the basis of the average monthly volume of water supplied to the premises during the preceding months of December, January, February, March as shown on the bill presented to the occupants of the premises by the private water company supplying substantially all of the water used on the premises.
2. Where the director either finds that the premises were connected to the sewer system on or after the first day of the preceding month of December, finds that there has been a significant change in the type or intensity of the use of the premises on or after the first day of the preceding month of December, or finds that substantially all of the water used on the premises is not supplied by a private water company, or separately metered, or finds that a substantial amount of the water supplied is not directed to the waste water stream but instead reused or consumed by an industrial or similar process or is incorporated into commercial products, then the director shall determine the monthly volume of wastewater discharged from the premises to the sewer system on the basis of all relevant information available to the director, including but not limited to the quantity of wastewater discharged to the sewer system from other premises within the city devoted to the same or a similar use.
(Ord. 1735 §1 (part), Ord. 2113 §1, Ord. 2268, Ord. 2356 §1, 2423 §3, 2507 §1)