Challenge
In 2009, the NYSDEC determined that BTA for Barrett was wet closed- cycle cooling (CCC) to assure the protection and propagation of a balanced, indigenous community (BIC) in the receiving waters as required by New York State regulations and the State ’s BTA Policy CP -52.
Approach
As part of SPDES permitting, ASA assisted National Grid in the evaluation of BTA alternatives for minimizing the environmental effects of Barrett’s CWIS and thermal discharge on receiving waters of Hempstead Bay.
Solution
ASA conducted extensive biological monitoring and IM/E analyses, including biothermal analyses, to establish the BIC for the thermal mixing zone and control areas demonstrating that alternatively, the BIC would be assured with Installation of variable speed drives (VSD) and Hydrolox™ screens with fish protection features and continuous operation.
