In May 1990, the PUC issued an order requiring that the expense of the NBC’s Pretreatment Program must be paid for entirely by the permitted user. These permit fees are necessary to recover costs associated with satisfying all EPA and State mandates and to ensure the protection of the treatment facilities and Narragansett Bay. The rates charged are PUC approved and cover the cost of program, administration, facility inspection and facility sampling conducted by the NBC.
Individual permit fee rates are based on the effort necessary for the NBC to regulate a user. The level of effort depends on the size of a facility, the volume of discharge, the toxicity of the chemicals used, etc.
For a list of permit Classification Fees click here.
BOD/TSS Surcharge Fees
Biological Oxygen Demand (BOD) is the amount of oxygen utilized by microorganisms that decompose organic waste matter in water. BOD is calculated using a standard laboratory procedure for five days at 20°C.
Total Suspended Solids (TSS) are (1) insoluble solids that either float on the surface of or, are suspended in water, wastewater or other liquids; (2) solid organic or inorganic particles (colloidal, dispersed, coagulated, flocculated) physically held in suspension by agitation or flow or; (3) the quantity of material removed from wastewater in a laboratory test, as prescribed in ʺStandard Methods for the Examination of Water and Wastewaterʺ and referred to as nonfilterable residue.
Concentrations of BOD or TSS which exceed specific threshold values are billed a surcharge to cover the additional costs of treatment as determined by rates set and approved by the Public Utilities Commission. The threshold value for assessing a surcharge for BOD is 300 mg/L and for TSS is 300 mg/L.
BOD/TSS surcharge rates are:
- $87 per 1,000 pounds of BOD with a concentration >300 mg/L
- $87 per 1,000 pounds of TSS with a concentration >300 mg/L
At this time, the NBC has suspended collecting the surcharge fee for exceeding the BOD and TSS limitations.