Fox Metro Excessive Strength Discharge Surcharges
(Ordinance #517, Section 300.125)
Fox Metro has determined that certain pollutants are compatible with the wastewater treatment process. Fox Metro reserves the right to recover the treatment costs for those compatible pollutants that exceed the surcharge levels listed in this section.
| Compatible Pollutant |
Surcharge Level |
| Biochemical Oxygen Demand (CBOD5) |
200 mg/L |
| Total Suspended Solids (TSS) |
250 mg/L |
| Ammonia Nitrogen (NH3-N) |
25 mg/L |
| Hexane Extractable Materials (HEM) |
100 mg/L |
The excessive strength sewage surcharges for these pollutants are calculated using the following formula:
Ps = ( Pavg - Psl ) x Q x 8.345 x TCp
where:
-
Ps = the excessive strength surcharge for the given compatible pollutant.
-
Pavg = the average concentration of the compatible pollutant for the wastewater discharge in question.
-
Psl = the surcharge level concentration of the compatible pollutant as indicated in any Fox Metro Ordinances or Rate Schedules in effect at the time the surcharge is calculated.
-
Q = the Industrial User wastewater flow in millions of gallons (MG).
-
8.345 = a factor which converts the product of concentration (mg/L) and flow (MG) into pounds of compatible pollutant.
-
TCp = the treatment cost charge per pound of the compatible pollutant, such charge being stipulated by any Fox Metro Ordinances or Rate Schedules in effect at the time the surcharge is calculated.
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