ELSA is a publicly owned wastewater treatment facility serving the communities of Ewing and Lawrence Townships in New Jersey. The effluent from the wastewater treatment plant (WWTP) contains low levels of copper. However, due stringent water quality criteria for protection of aquatic life and minimal dilution of the ELSA effluent in the receiving water, the New Jersey Department of Environmental Protection (NJDEP) imposed copper effluent limitations in ELSA’s NPDES permit.
Kleinfelder’s application of state-of-the-art concepts to the determination of effluent limitations and site-specific numeric water quality criteria demonstrated that this WWTP discharge would not cause water quality criteria violations. Consequently, effluent limitations for copper are not necessary for this facility.