CHAPTER 2

SEWER SERVICE CHARGES

SECTION:

9-2-1:		Purpose
9-2-2:		Procedure For Determining Sewer Service Charges
9-2-3:		Payment Of Service Charges And Penalties
9-2-4:		Review Of Service Charges
9-2-5:		Prohibited Wastes
9-2-6:		Clear Water Connections Prohibited
9-2-7:		Proper Design And Construction !2R!

9-2-1:		PURPOSE:

The purpose of this chapter shall be to generate sufficient revenue to pay all costs for the operation and maintenance of the complete wastewater system. The costs shall be distributed to all users of the wastewater system in proportion to each user's contribution to the total loading of the treatment works. Factors such as strength (BOD and TSS), volume and delivery flow rate characteristics shall be considered and included as the basis for the user's contribution to ensure a proportional distribution of operation and maintenance costs to each user (or user class). (1987 Code § 9-3-1)

9-2-2:		PROCEDURE FOR DETERMINING SEWER SERVICE CHARGES:

A.	Total Annual Cost Of Operation And Maintenance: The city shall determine the total annual costs of operation and maintenance of the wastewater system which are necessary to maintain the capacity and performance, during the service life of the treatment works, for which such works were designed and constructed. The total annual costs of operation and maintenance shall include, but need not be limited to, labor, repairs, equipment replacement, maintenance, necessary modifications, power, sampling, laboratory tests, and a reasonable contingency fund. (1987 Code § 9-3-2)

B.	Each User's Wastewater Contribution Percentage:

1.	The city shall determine each user's average daily volume of wastewater, which has been discharged to the wastewater system, which shall then be divided by the average daily volume of all wastewater discharged to the wastewater system, to determine each user's volume contribution percentage. The amount used as the total average daily volume of wastewater shall exclude infiltration and inflow. The city shall determine each user's average daily poundage of five (5) day, twenty degree (20^o) centigrade biochemical oxygen demand which has been discharged to the wastewater system, which shall then be divided by the average daily poundage of all five (5) day, twenty degree (20^o) centigrade biochemical oxygen demand discharged to the wastewater system to determine each user's biochemical oxygen demand contribution percentage.

2.	The city shall determine each user's average suspended solids poundage which has been discharged to the wastewater system which shall then be divided by the average daily poundage of all suspended solids discharged to the wastewater system, to determine the user's suspended solids contribution percentage. Each user's volume contribution percentage, biochemical oxygen demand contribution percentage and suspended solids contribution percentage shall be multiplied by the annual operation and maintenance costs for wastewater treatment of the total volume flow, of the total five (5) day, twenty degree (20^o) centigrade biochemical oxygen demand and the total suspended solids, respectively. (1987 Code § 9-3-3)

C.	Surcharge System For Users With Above Average BOD And TSS: The city will determine the average suspended solids (TSS) and biochemical oxygen demand (BOD) daily loadings for the average residential user. The city will assess a surcharge rate for all nonresidential users discharging wastes with BOD and TSS strengths greater than the average residential user. Such users will be assessed a surcharge, sufficient to cover the costs of treating such users above normal strength wastes. Normal strength wastes are considered to be two hundred (200) ppm BOD and two hundred fifty (250) ppm TSS. The surcharge rate structure for above normal strength waste dischargers shall be as set by resolution of the city council. (1987 Code § 9-3-4)

D.	Each User's Wastewater Service Charge: Each nonresidential user's wastewater treatment cost contributions as determined in subsections B and C of this section shall be added together to determine such user's annual wastewater service charge. Residential users may be considered to be one class of user and an equitable service charge may be determined for each such user based upon an estimate of the total wastewater contribution of this class of user. The city council may classify industrial, commercial and other nonresidential establishments as a residential user; provided, that the wastes from these establishments are equivalent to the wastes from the average residential user with respect to volume, suspended solids and five (5) day twenty degree (20^o) centigrade biochemical oxygen demand. Each user's wastewater treatment cost contribution will be assessed in accordance with the rate schedule as adopted by resolution of the city council. (1987 Code § 9-3-5)

9-2-3:		PAYMENT OF SERVICE CHARGES AND PENALTIES:

The payment of charges and fees shall be as established in section 9-1-4 of this title. (2004 Code)

9-2-4:		REVIEW OF SERVICE CHARGES:

The city shall review the total annual costs of operation and maintenance as well as each user's wastewater contribution percentage on an annual basis and will revise the system as necessary to assure that sufficient funds are obtained to adequately operate and maintain the wastewater treatment works. If a significant user, such as an industry, has completed in plant modifications which would change the user's wastewater contribution percentage, the user can present at a regularly scheduled meeting of the governing body such factual information and the city shall then determine if the user's wastewater contribution percentage is to be changed. The city shall notify the user of its findings as soon as possible. (1987 Code § 9-3-7)

9-2-5:		PROHIBITED WASTES:

The discharge of any waters containing toxic or poisonous solids, liquids or gases in sufficient quantity, either singly or by interaction with other wastes, to contaminate the sludge of any municipal system, to injure or interfere with any sewage treatment process, constitute a hazard to humans or animals, create a public nuisance, or create a hazard in the receiving waters of the wastewater treatment plant is hereby prohibited. (1987 Code § 9-3-8)

9-2-6:		CLEAR WATER CONNECTIONS PROHIBITED:

No person shall make connection of roof downspouts, exterior foundation drains, areaway drains, or other sources of surface runoff or ground water to the building sewer or building drain which in turn is connected directly or indirectly to a public sanitary sewer. (1987 Code § 9-3-9)

9-2-7:		PROPER DESIGN AND CONSTRUCTION:

The size, slope, alignment, materials and construction of all sanitary sewers and sewer connections, and the methods to be used in excavations, placing of the pipe, jointing, testing, and backfilling the trench, shall all conform to the regulations of the city and the state. In the absence of code provisions or in amplification thereof, the materials and procedures set forth in appropriate specifications of the ASTM and WPCF manual of practice no. 9 shall apply. (1987 Code § 9-3-10)