The State Environmental Protection Agency requires each industrial user to pay that portion of any State grant which has been obtained by the Village of Dwight for the financing of the construction of wastewater treatment works allocable to the treatment of the wastewater from such user. Such users share shall not include an interest component.
The charge for industrial cost recovery shall be based on a charge per unit volume of normal strength process flow. Normal strength flow shall be waster strength less than or equal to 200 mg/l BOD and 250 mg/l SS.
A. 
The total industrial cost recovery charge for each billing period shall be determined by multiplying a users industrial process flow volume discharged during the billing period by $0.12 per 1,000 gallons.
B. 
Industrial process flow volume shall be determined by measurement or estimation of all water flow through industrial plant processes. In absence of meter readings, process flow shall be estimated by using the following formula:
PF = TWF - DF - CF
Where:
PF
=
process flow for billing period.
TWF
=
total water flow for billing period from meter reading, plus estimates of flow from private wells, if any.
DF
=
domestic flow from employees estimated by multiplying the average number of man-shifts worked for the billing period by an allowance of 25 gallons per person per shift worked.
CF
=
flow consumed or otherwise not returned to the sewer.
C. 
If in the opinion of the Village Clerk, the Village's interest would best be served by making the above estimation on an annual basis, then the Clerk may elect to negotiate with each industry a percentage of the total water flow to estimate process flow each billing period.
If, at any time, during the industrial cost recovery period an industry begins discharging wastes with strengths greater than 200 mg/l BOD and 250 mg/l SS, a study shall be made under the direction of the Village Board to revise the industrial cost recovery charge to include a high waste strength surcharge as well as a process flow volume charge. The revised charge factors shall be applied to process flow volume and measured waste strength quantities in excess of normal.
The Sewer Plant Operator shall maintain a program of monitoring industrial user discharges as the Village Board deems necessary, provided that any major contributing industry shall be monitored no less than 12 times annually.