A. General:
1. This is a user charge for a small community which follows model number one in appendix B of the federal register dated September 27, 1978. This treatment works is primarily flow dependent and will utilize the equivalent user concept. The equivalent user system has been set up based on flow.
2. A sewer user charge shall be levied on all users of the sewage collection and treatment facilities for the purpose of allocating among such users the costs of operation, maintenance, replacement and financing of this facility in approximate proportion to each such user's contribution to the total wastewater load of such facilities.
B. Basis For User Charge:
1. The sewer user charge for each user or user class shall be based on the user's contribution to the total wastewater loading of the treatment facilities in comparison to a standard equivalent user as defined.
2. The sewer user charge for each user shall be in accordance with the equivalent user schedule established below. The sewer user charge for a single user having more than one classification shall be determined by adding together the equivalent user for each classification. The user charge for special users contributing sewage of excessive flow and/or strength, for which the tabulated equivalent users below do not apply, shall be individually calculated as provided below. The monthly fee to be paid by each user shall be computed by multiplying the sewer user charge for each user by a constant monthly cost factor which shall be as set by the city council. The minimum sewer user charge shall be one equivalent user.
C. Equivalent User: "One equivalent user" shall be defined as contributing three hundred fifty (350) gallons per day of wastewater containing not more than seven-tenths (0.7) pounds of five (5) day BOD and seven-tenths (0.7) pounds of suspended solids. The equivalent user flow has been developed from population and sewer usage records which indicate an average dwelling unit has three and one-half (31/2) people contributing one hundred (100) gallons per day. Standard engineering data indicates two-tenths (0.2) pounds of five (5) day BOD and two- tenths (0.2) pounds of suspended solids respectively per person per day. The basic equivalent user shall be subject to revision if population, water usage, sewage volume, and/or other information indicates flow and/or strength significantly different from that defined herein. Revision of the basic equivalent user criteria shall normally only be made upon the recommendation of a registered, professional engineer. (Ord. 1982-1, 2-17-1982)
D. Equivalent User Schedule: The number of equivalent users which shall comprise the sewer user charge for each user and/or user class shall be in accordance with the following equivalent user schedule. Assignment of equivalent users shall apply for one year until the next annual user charge review. Users so indicated or not included in this schedule shall be considered special users and shall be evaluated separately as provided below. If and when the information indicates that the strength of sewage contributed by any of the following users is in excess in comparison with the allowable limits listed above, then a surcharge shall be levied against such users as provided below. Any of the users in the following schedule may be classified as special users if information on their contribution flow and/or strength indicates a need to do so:
EQUIVALENT USER SCHEDULE
1.0 Minimum
Classification
| Equivalent Users
| |||||
Classification
| Equivalent Users
| |||||
Assembly hall or lodge (no cafe) | 1.00 | |||||
Bar or tavern (for each seat) | 0.06 | |||||
Barber and beauty shops (per chair) | 0.20 | |||||
Bowling alley (per lane) | 0.50 | |||||
Cafe, drive-in, less than 20 inside seats | 2.00 | |||||
For each additional 20 seats | 1.00 | |||||
Cafe, up to 50 seats | 2.00 | |||||
For each additional 25 seats | 1.00 | |||||
Car washes, per stall | 2.00 | |||||
Churches | ||||||
Single congregation (per chapel seat) | 0.01 | |||||
Multiple congregations (per chapel seat times number of congregations) | 0.01 | |||||
With kitchens additional | 1.00 | |||||
Condominiums (per unit) | 0.75 | |||||
Garage or maintenance shop | 1.00 | |||||
Hospitals or medical clinics (with no beds) | 3.00 | |||||
For each additional bed | 0.50 | |||||
Hot baths, per average person per day | 0.06 | |||||
Hotels, motels (per unit) | 0.38 | |||||
Or rooming house (additional per unit with kitchen) | 0.20 | |||||
Institutions with permanent or temporary residents | 1.00 | |||||
Rest homes, etc. (plus per resident) | 0.30 | |||||
Laundromat, up to 10 washers | 4.00 | |||||
For each additional washer | 0.30 | |||||
Office, up to 20 employees | 1.00 | |||||
For each additional employee | 0.03 | |||||
Public pay toilets, per urinal or toilet | 0.10 | |||||
Roof drains | ||||||
Eq. user/mo. = Ar x 1.35 ft. x 7.48 gal/cf divided 12 divided 350: | ||||||
Ar | = | Roof area in square feet. | ||||
1.35 | = | Annual precipitation from weather data. | ||||
7.48 | = | Conversion factor from cubic feet to gallons. | ||||
12 | = | Conversion from yearly to monthly. | ||||
350 | = | Amount of flow in gallons for 1 equivalent user. | ||||
Schools, no cafeteria, per student | 0.03 | |||||
With cafeteria, per student | 0.05 | |||||
Service stations | 2.00 | |||||
Single dwelling unit (residence, apartment or trailer) | 1.00 | |||||
Store or business, up to 20 employees | 1.00 | |||||
Each additional employee | 0.03 | |||||
Supermarkets, grocery | 2.00 | |||||
With butcher shop | 1.00 | |||||
Swimming pools, per average person per day | 0.06 | |||||
Trailer parks | ||||||
Permanent resident trailers | 1.00 | |||||
Overnight trailers | 0.38 | |||||
Sanitary waste dump station | 5.00 | |||||
Warehouses, potato, etc., per 10,000 gallons/month | 1.00 | |||||
Open class per 10,000 gallons/month | 1.00 | |||||
(Ord. 1982-3, 3-17-1982; amd. Ord. 1983-1, 1-19-1983; Ord. 1994-4, 10-13-1994; Res. 2008-2, 9-9-2008)
E. Surcharge For Excessive Strength: When any user contributes wastewater having an average BOD and/or suspended solids loading in excess of the designated allowable limits hereinafter designated, a surcharge shall be levied against such user. Said surcharge shall apply to sewage strength in excess of two hundred milligrams per liter (200 mg/l) of BOD and two hundred milligrams per liter (200 mg/l) of TSS. Said surcharge is based only on operation and maintenance costs for the current year's city budget as determined in the user charge system. Said surcharge shall be levied against the user in excess of the charge provided in the user charge system schedule. The proportion of the operating and maintenance costs (O&M costs) shall be distributed as follows:
Flow = 60 percent | ||
BOD = 20 percent x cost of operation and maintenance | ||
TSS = 20 percent x cost of operations and maintenance | ||
The BOD and TSS loading shall be determined from the tests averaged over the period made by city officials or the city engineer. The monthly user surcharge shall be computed by use of the following equations: | ||
BOD/$MO = Total Flow/MO x BOD-200 x 20% x EU O&M | ||
Tested 200 | 10,500 | |
WHERE | : Flow is in gallons | |
: BOD tested is in ppm or mg/l | ||
: 200 is the allowable limit in ppm or mg/l | ||
: EU O&M in ppm or mg/l | ||
TSS/$MO = Total Flow/MO x TSS-200 x 20% x EU O&M | ||
Tested 200 | 10,500 | |
: Flow is in gallons | ||
: TSS tested is in ppm or mg/l | ||
: 200 is in ppm or mg/l | ||
: EU O&M in ppm or mg/l | ||
A copy of the list of user surcharge, the characteristics of their sewage, and the surcharge for each shall be kept on file at all times in the office of the city clerk-treasurer. (Ord. 1983-1, 1-19-1983)
F. Special Users:
1. Determination: If, in addition to excessive strength, a user is determined to add flow to the lagoon in excess of ten thousand (10,000) gallons per month, the above formula shall be multiplied by a factor of total flow divided by ten thousand (10,000) gallons per month. In order to determine the flow of this special user, the city may monitor sewage and water flow in order to determine total flow. The value of user's monthly charge used in the formula above will be the same value as assigned single dwelling units.
2. Copy On File: A copy of the list of special users, the characteristics of their sewage, and the special user's monthly charge shall be kept on file at all times in the office of the city clerk-treasurer.
G. User Request For Change In User Charge: Any sewer user who feels his user charge is unjust and inequitable as applied to his premises within the spirit and intent of the foregoing provisions may make written application to the city council requesting a review of his user charge. Said written request shall, where necessary, show the actual or estimated average flow and strength of his wastewater in comparison with the values upon which the charge is based, including how the measurements or estimates were made. Any flow measurements and/or testing of wastewater shall be approved in detail by the city and/or its engineer. Review of the request by the city council shall determine if it is substantial or not, including recommended further study of the matter for the city and/or user by a registered, professional engineer. (Ord. 1982-1, 2-17-1982)