(A) The POTW is primarily flow dependent. Therefore, the following formula is used to calculate user charges.
Cu | = | Ct | × | Vu |
Vt |
Where:
Ct = Total operation and maintenance plus replacement (O&M+R) costs per unit of time.
Cu = A user’s charge for O&M+R per unit of time.
Vu = Volume contribution from a user per unit of time.
Vt = Total volume contribution from all users per unit of time.
(B) In the event BOD, suspended solids, or other pollutant concentrations from a user exceed the range of concentration of these pollutants in normal domestic sewage, a surcharge added to the base charge (above) will be levied. The surcharge will be computed by the formula below.
Cs = (Bc(B) + Sc(S) + Pc(P)) Vu
Where:
Cs = A surcharge for wastewaters of excessive strength.
Bc = O&M+R cost for treatment of a unit of biochemical oxygen demand (BOD).
B = Concentration of BOD from a user above a base level.
Sc = O&M+R cost for treatment of a unit of suspended solids.
S = Concentration of SS from a user above a base level.
Pc = O&M+R cost for treatment of a unit of any pollutant.
P = Concentration of any pollutant from a user above a base level.
Vu = Volume contribution from a user per unit of time.
(C) Any other pollutant which causes an increase in the cost of treatment will be assessed in a similar fashion.
Other Pollutant Rate | = | Total Cost to Treat Other Pollutant |
Total Pounds of Other Pollutant |
(Prior Code, § 16-6-1)