§ 52-4. Industrial surcharge.

When a customer is to be charged an industrial surcharge for overstrength sewerage, the following formula shall be used to compute the monthly bill:

SC = (Q) (8.34) [(a(BOD—250)) + (b(SS—250))(1.20)]

Where:

SC	=	Surcharge based on excessive concentrations of BOD and/or [suspended solids] (dollars per month)
Q	=	Estimated sewer flow (stated in million gallons per year divided by 12 months equals million gallons per month) or actual meter flow if metered
(a)	=	Monthly adjusted unit cost of treatment, chargeable to BOD (dollars per pound of BOD introduced to system)
(b)	=	Monthly adjusted unit cost of treatment, chargeable to SS (dollars per pound of SS introduced to system)

 

EXAMPLE OF FORMULA

a.

Water consumption per year = 80,000 gallons ('000)

b.

BOD = 700

c.

SS = 1,000

d.

Treatment cost for BOD and SS = $0.02 per pound (for this example only)

e.

Estimated sewer flow = 80,000,000 — 10 percent or 72,000,000 gallons per year divided by 12 months = 6 million gallons

f.

SC = Q (8.34) [((a(BOD—250)) + (b(SS—250))(1.20)]

SC = 6(8.34) [((.02(700—250)) + (.02(1,000—250)))(1.20)]

SC = 50.04 [(($.02(450)) + ($.02 (750)))(1.20)]

SC = 50.04 [$9. + $15.](1.20)

SC = 50.04 ($24.)(1.20)

SC = $1,441.15 per month.

(Ord. No. 4211, § 1, 9-22-83; Ord. No. 2018-10098, § 1, 9-20-18 )

Cross reference

Industrial surcharge for class groups, § 41-23.1.