Any water or waste which has characteristics based on a 24-hour composite sample, or a shorter period composite sample if more than representative, which exceeds the following normal maximum domestic wastewater parameter concentrations, shall be surcharged as follows:
Parameter
Maximum Allowable Concentration Without Surcharge
BOD
300 mg/l
COD
900 mg/l
TSS
300 mg/l
NH3-N
25 mg/l
Surcharge Costs:
BOD
$0.636/pound in excess of 300 mg/l
COD
$0.636/pound in excess of 900 mg/l
TSS
$0.730/pound in excess of 300 mg/l
NH3-N
$1.590/pound in excess of 25 mg/l
The surcharge will be calculated as follows:
Surcharge = (X - Y) x Q x 8.34 x R, where:
X = Actual parameter concentration
Y = Allowable parameter concentration
Q = Total discharge quantity in million gallons for a specific surcharge calculation period
R = Surcharge rate in $/lb.
For BOD and COD surcharges, the parameter formula giving the larger surcharge payment will be used for the given period.
There will be a minimum surcharge of $10, below which there will not be collection or assessment.
