1. As the BOD, suspended solids and other pollutant concentrations discharged shall be approximately equal for all domestic users, users shall be charged on a volume basis in accordance with the following formula:
CU = Cb + Ct/Vt (Vu)
2. Symbols and definitions shall be as follows:
CU = A user’s charge per unit of time;
Cb = A user’s base minimum charge (for debt retirement, billing, administration and the like) per unit of time;
Ct = Total operation and maintenance (O&M) costs per unit of time;
Vt = Total volume contribution from all users per unit of time (may include extraneous flows); and
Vu = Volume contribution from a user per unit of time.