Suspension of the blowdown from cooling towers for 6-12 hr after application and/or segmenting plantwide treatments will reduce the level of product remaining in the effluent.
This product appears to be most effective at temperatures greater than 63 EF (17 EC). At temperatures of between 63 and 54 EF (17 and 12 ?C), the mortality of zebra mussels exposed to 3.0 mg L-1 (3 ppm) for 8 hr was approximately 20 percent compared with 80 percent mortality among zebra mussels exposed under the same conditions, but at a temperature of 68 EF (20 EC) (Piccirillo, Dionne, and Sandberg 1997).