Fisheries committee  As a fisheries scientist, I would say that a rapid response may not be effective for all species. It might be good for fishes such as Asian carp and goby, but I think it would be less effective for zebra mussels. After working with mussels for years and seeing what they do.... It

Fisheries committee  All users.... The smaller the pipe, the bigger the risk of clogging. We close off our smaller piping system for a period of time, treat it with Zequanox or chlorine, and then flush it through to make sure there are no live zebra mussels in the system. We do that annually. We have

Fisheries committee  Yes.

Fisheries committee  It may be. Copper alloys are slightly toxic, which is why they don't attach. I don't know. We would have to talk to one of our engineering staff to do that. We haven't used it, and we haven't retrofitted our stations with those alloys.

Fisheries committee  There is. I mentioned it earlier. It's called Zequanox. It was developed in the U.S. It's a dead bacteria. You have a pipe. You seal both ends and inject this Zequanox in for a period of time. The zebra mussels eat it. They die. It's only for dreissenids, for quagga and zebra mu

Fisheries committee  Yes, but it's expensive and we haven't found it to be as successful as chlorine.

Fisheries committee  No, not that I know of to date. You have to understand that, in our systems, in the turbines themselves where the main water flows, the zebra mussels aren't an issue. There's too much flow. They can't attach there. It's in these backwater systems—our fire water systems, our cool

Fisheries committee  Yes, like in your rural water supplies.

Fisheries committee  It was a major concern with the use of “deleterious substances”, in DFO language. Chlorine is toxic to the aquatic environment, so that's a deleterious substance. OPG had been treating for zebra mussels into the nineties. We had provincial permits to use chlorine to maintain our

Fisheries committee  —but there are some cases where you have to. Then when we discharge it to the natural environment, it's at a very low level but it's a chronic impact.

Fisheries committee  That I can't answer.

Fisheries committee  I know Manitoba Hydro is using it now or is exploring it. I don't know how efficient it is. OPG has used a dead bacteria called Zequanox that's only toxic to dreissenid mussels. They eat it and then die. That's one good way to do it. We also use UV systems as well in our piping,

Fisheries committee  OPG gets no support from the DFO regarding control of invasives. We use chlorine to kill the mussels in our plants. We also use UV systems and some novel methods, such as a dead bacteria, called Zequanox, that is toxic only to dreissenid mussels. We don't get any help. I saw so

Fisheries committee  Hello, Mr. Chair and committee members. Thank you for having me today. My name is Dave Stanley. I'm a senior environmental scientist with Ontario Power Generation. OPG has a fleet of 66 hydro stations that can generate almost 7,500 megawatts of electricity. Further, not only