A surcharge upon industrial and commercial users of the system is hereby imposed upon such industrial and commercial users when they deposit substances into the system which increases the biochemical oxygen demand for treatment thereof and further increases or surcharges are imposed upon industrial and commercial users that deposit substance into the system which require greater chlorine usage or suspended solids. The surcharge rate structure and formula to be imposed on such individuals is set forth as follows:
A.
Suspended solids:
F = 1 + 0.50 | 0.44 (SS - 2.75) | |
275 |
Where: | ||||
F | = | Factor to be applied to basic rate. | ||
SS | = | Suspended solids of particular wastes, in parts per million (ppm). | ||
B.
Biochemical oxygen demand:
F = 1 + 0.50 | 0.27 (BOD) - 300 | |
300 |
Where: | ||||
F | = | Factor to be applied to basic rate. | ||
BOD | = | Biochemical oxygen demand of particular wastes, in parts per million (ppm). | ||
C.
Chlorine demand:
Rc | = | 0.00835 Pc (C-5) | ||
Where: | ||||
Rc | = | Surcharge rate for chlorine, in cents per pound. | ||
Pc | = | Contract price of chlorine, in cents per pound. | ||
C | = | Chlorine demand of particular wastes, in parts per million (ppm). | ||