§ 30-141. Same—Surcharge for operation and maintenance.

The surcharge for operation and maintenance for wastewater and with more than 225 mg/l of BOD and 200 mg/l of suspended solids shall be as follows:

The surcharge formula:

SC =	[Rp (Pi - Pn) + Rs (Si - Sn) + Rx
	(Xi - Xn) × 8.34 × V

 

as described would be used to determine this "extra charge" based upon laboratory analysis of the wastewater as selected time periods to be determined for each industry involved.

Where SC = Surcharge, in dollars

R_p = Unit BOD cost of treating normal sewage, $0.1449 per pound

Pi = BOD in the industrial waste, ppm

Pn = BOD in normal sewage, ppm (225)

R_s = Unit suspended solids cost of treating normal sewage, $0.1475 per pound

Si = Suspended solids in the industrial waste, ppm

Sn = Suspended solids in normal sewage, ppm (200)

R_x = Unit cost of treating any additional substance in the industrial waste, in dollars per pound

Xi = Substance requiring additional treatment in the industrial waste, ppm

Xn = Substance requiring additional treatment in normal sewage, ppm

8.34 = lb/million gallon-mg/l

V = Wastewater volume, million gallon

(Ord. No. 2090, § 1, 3-26-1979; Ord. No. 2113, § 1, 12-10-1979)