A. Basis: 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 waste strength less that or equal to two hundred (200) mg/l BOD and two hundred fifty (250) mg/l.
B. Total Charge To Industrial User.
1. The total industrial cost recovery charge for each billing period shall be determined by multiplying a user's industrial process flow volume discharge during billing period by:
$0.28 per 1,000 gallons
for those users discharging standard strength waste. For users producing wastes having strengths higher than normal, a surcharge shall be added computed in accordance with Section 8-2-9-3 of this Section.
2. 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 twenty five (25) gallons per man-shift worked.
CF = flow consumed or otherwise not returned to the sewer. In addition, those discharging waste having strengths greater than standard shall pay the surcharge set out in Section 8-2-9-3 of this Section.
3. If, in the opinion of the City Council, the City's interest would be served by making the above estimation on an annual basis, then the City Council may elect to negotiate with each industry a percentage of the total water flow to estimate process flow each billing period. (Ord. 146, 1980)