ENB Region 5 Completed Applications 12/29/2004

The State Pollutant Discharge Elimination System (SPDES) permit for this Sewage Treatment Plant (STP) in Clinton county that discharges to the Saranac River has  been modified in accordance with New York State’s  Environmental Benefit Permit Strategy (EBPS).

FACILITY:    Village of Dannemora WWTP  

SPDES:    NY 002 2195

DEC ID:    5-0944-00001/00001

This SPDES permit last underwent technical review in 1989.  In the intervening years there have been changes in applicable federal and state law, regulation, policy, and permit format.  Consequently, there are several permit changes proposed.  A summary of the most significant changes follows:  

A phosphorus limit has been added to the permit consistent with the September 25, 2002 Lake Champlain TMDL.  Because of the way the phosphorus limit is calculated, i.e. a 12 month rolling average, compliance will not be measured until 12 months from the date of permit issuance.

The TSS limits have been reduced in accordance with federal regulations (40 CFR 133.105b).

Due to water quality concerns the chlorine limit has been reduced; a new nitrite limit added; and routine monitoring for nitrate, copper, lead, and zinc added.  Annual monitoring for other priority pollutant metals has also been included.

A survey of contributing industrial users is required to better characterize the industrial pollutant loadings and their impact on effluent quality.

Mass limits for BOD and TSS were previously expressed to 3 significant figures.  These analytical methods do not provide for this level of precision.  Therefore, these mass limits have been revised to 2 significant figures.  As a practical matter, the new BOD mass limits are the same as the old.  The TSS limits are different due to a reduction in the concentration basis used to calculate them.