Mv2011l4-0002

Rhonda Miller - MVLWB

From: Kathleen Graham [[email protected]] Sent: August-04-11 4:24 PM To: [email protected] Subject: FW: FW: Hg monitoring in Nonacho Lake

From: Hanna, Bruce [mailto:[email protected]] Sent: Thursday, August 04, 2011 3:59 PM To: Kathleen Graham Cc: Nathen Richea; Marie Adams; Lambert,Stacey [Yel]; [email protected]; Dean Carter; Geraldine Byrne; Florence Catholique Subject: FW: FW: Hg monitoring in Nonacho Lake

Hi Kathleen,

I received the input below from GNWT Health and Social Services and Health Canada regarding monitoring mercury in Lake Trout in Nonacho Lake. It appears that the 7 year monitoring cycle proposed by NTPC will be adequate.

Have a good afternoon.

Bruce

Bruce Hanna Senior Habitat Biologist | Biologiste, Habitat (867) 669-4931 | facsimile/ télécopieur (867) 669-4940 [email protected] Fish Habitat Management, Western Arctic Area|Gestion de l'Habitat du Poisson, Secteur de l'Arctique de l'Ouest Central and Arctic Region | Région Centrale et de l’Arctique Fisheries and Oceans Canada | 301-5204 50th Ave, Yellowknife, NT, X1A 1E2 Pêches et Océans Canada | 301-5204 50e Ave, Yellowknife,T.N.-O, X1A 1E2 Government of Canada | Gouvernement du Canada

From: Kami Kandola [mailto:[email protected]] Sent: 2011–July-29 2:40 PM To: Hanna, Bruce Cc: Duane Fleming; Lorne Clearsky; Lorna Skinner Subject: FW: FW: Hg monitoring in Nonacho Lake

Hi Bruce,

Please see response from our expert Health Canada toxicologist. Please continue monitoring as normal ( every 7 years).

Kami

Kami Kandola, MD, MPH, CCFP, FCFP, DTM&H, ABPM Deputy Chief Public Health Officer Office of the Chief Public Health Officer Department of Health and Social Services Government of Northwest Territories P.O. Box 1320, Yellowknife, NT X1A 2L9 Tel 867-920-8646/ Fax 867- 873-0442 Email: [email protected]/www.hlthss.gov.nt.ca

From: Mark Feeley [mailto:[email protected]] Sent: Friday, July 29, 2011 2:37 PM To: Kami Kandola Subject: Re: FW: Hg monitoring in Nonacho Lake

I'd probably need to take a closer look at the results; a quick comparison suggests that the fish collection done in 2010 has slightly larger (longer fish) but less variability in overall length compared to 2004. With a consumption advisory already applied to the lake, there's no real incentive to continue to monitor outside the suggested 7 years unless you get evidence to suggest the mercury levels have substantially increased (or decreased) from the current levels. If the suggested rate of "increase" stays the same, I don't see much change occurring within the next 7 years.

There's always changing climatic conditions to think about.

Mark Feeley.

"Kami Kandola" ---2011-07-29 04:09:40 PM---How often should we monitoring mercury in water in Nonacho Lake? Currently, it is every 7 years. I s

From: "Kami Kandola" To: "Mark Feeley" Date: 2011-07-29 04:09 PM Subject: FW: Hg monitoring in Nonacho Lake

How often should we monitoring mercury in water in Nonacho Lake? Currently, it is every 7 years. I see no reason to increase this since they will not find much change.

Kami

From: Lorne Clearsky Sent: Friday, July 29, 2011 1:55 PM To: Kami Kandola Subject: Fw: Hg monitoring in Nonacho Lake

Any ideas as to how often?

Lorne

From: Hanna, Bruce [mailto:[email protected]] Sent: Friday, July 29, 2011 11:33 AM

2 To: Lorne Clearsky; Duane Fleming; Evans,Marlene [NHRC] Cc: Michele Culhane ; Nathen Richea ; Marie Adams ; Lorna Skinner Subject: Hg monitoring in Nonacho Lake

Good morning,

NTPC is in the proecess of renewing their Water Licence. They have included Hg monitoring in Nonacho Lake as part of their Water Effects Monitoring Program but on a 7 year cycle. With the health advisory issued what frequency would you recommend?

Thanks very much.

Bruce