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Health committee Thank you. It's wonderful to know your background as a chemical engineer. The idea of trying to streamline provincial, municipal, and federal usage of water is a true challenge. One of the things I like about looking at other countries is that Canada may find other ways of doin
March 26th, 2018Committee meeting
Prof. Graham Gagnon
Health committee Yes. I think all three of us spoke quite clearly on the need for a first nations voice at some level. I would agree with Mr. Leonard that striving for new regulations shouldn't be just noise, but something that collectively all Canadians will be a part of, including indigenous
March 26th, 2018Committee meeting
Prof. Graham Gagnon
Health committee Thank you, committee members and Mr. Casey, for providing me this opportunity today to talk about Canada and drinking water. I’m presently the Director of the Centre for Water Resources Studies, a professor, and NSERC Industrial Research Chair at Dalhousie University in Halifax,
March 26th, 2018Committee meeting
Professor Graham Gagnon
Transport committee In the United States they use an action level. The action level is 15 micrograms per litre. The action level basically means that if a city saw 90% of their homes at greater than that action level, they would have to require corrective action. That's very different from a maximum
November 23rd, 2017Committee meeting
Prof. Graham Gagnon
Transport committee Right.
November 23rd, 2017Committee meeting
Prof. Graham Gagnon
Transport committee Agreed.
November 23rd, 2017Committee meeting
Prof. Graham Gagnon
Transport committee To place it in context, the estimate for the city of Chicago is about 300,000, so for Canada 200,000 would be a bit low. If you doubled it to 400,000 or 500,000, maybe you would hit it right. There is a complexity to it. Some cities, to get lead out, at one point in time remove
November 23rd, 2017Committee meeting
Prof. Graham Gagnon
Transport committee One challenge with lead service lines is that it's sometimes very difficult to look inside the home to find evidence of the lead pipe itself.
November 23rd, 2017Committee meeting
Prof. Graham Gagnon
Transport committee If you start to dig, with the amount of equipment and cost to have a construction firm on site, you might as well replace it. You have to remember, when you think about your own home or your neighbours' homes, that some people have very complex front yards. If you start to dig
November 23rd, 2017Committee meeting
Prof. Graham Gagnon
Transport committee You've hit the nail on the head with regard to the problem utilities face. I mentioned Regina, and they are very reluctant to add phosphate for this very reason. They discharge their waste water into a river system. Blue-green algae would be a top priority for them. Other chemic
November 23rd, 2017Committee meeting
Prof. Graham Gagnon
Transport committee Yes.
November 23rd, 2017Committee meeting
Prof. Graham Gagnon
Transport committee Yes, and I want to be clear. If you fully remove the lead service line, not partially remove it—
November 23rd, 2017Committee meeting
Prof. Graham Gagnon
Transport committee If you fully remove it, you're in a much better spot. We've seen homes that have returned to much lower concentrations, with 80% removal of lead within three months. You can significantly lower your lead burden by fully removing the lead line.
November 23rd, 2017Committee meeting
Prof. Graham Gagnon
Transport committee Well, what we talked about previously are the other components inside the home. There might be lead solder or there might be some kind of interesting fixture there, but to have a significant impact on the amount of lead, you have to fully remove the lead pipe.
November 23rd, 2017Committee meeting
Prof. Graham Gagnon
Transport committee Yes.
November 23rd, 2017Committee meeting
Prof. Graham Gagnon