Esf Ws Scraggy Monitoring Program 091024

Uploaded on


More in: Education , Technology
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads


Total Views
On Slideshare
From Embeds
Number of Embeds



Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

    No notes for slide


  • 1. Community-based water quality monitoring of Scraggy Lake
    • Dan Hutt
    • Eastern Shore Forest Watch
    • Oct. 24, 2009
  • 2. Scraggy Lake
    • A major lake on Nova Scotia’s Eastern Shore
    • 7 km long by 5 km wide
    • very shallow (less than 10 m)
    • 2 nd largest lake in Fish River water watershed after Lake Charlotte
  • 3.
    • Proponent: DDV Gold
    • Touquoy Gold Deposit
    • 500,000 oz deposit
    • low-grade ore
    • 5-7 year project
    • On-site processing
    • Cyanidation process
    • Tailings facility
    • Effluent flows into Scraggy Lake
    Proposed open-pit gold mine North tip of Scraggy Lake
  • 4. Threats posed by gold mine to Scraggy Lake and Fish River
    • Excavation will release highly soluable arsenic.
    • Also metals such as copper, lead, zinc, nickel
    • Residual cyanide from processing plant
    • Hundreds of thousands of kilograms of nitrate are expected to be released by breakdown of cyanide, leading to eutrophication .
    • oxidation of sulphide minerals associated with mine tailings could drastically lower pH which could activate normally benign metals.
  • 5. Community-Based Environmental Monitoring for Scraggy Lake
    • Create a database of water quality measurements
    • Obtain baseline data before gold mine begins
    • Maintain monitoring after mine in operation
    • Pressure NS government to do its own monitoring
    • Let DDV Gold know that the community is watching
  • 6. Water quality monitoring plan
    • Proposed by Matt Coady, Kendrick Ball and Patricia Egli
    • Four sampling sites proposed
    • Seasonal measurements
    • Chemical analysis for surface water
    • pH, conductivity and temperature at several depths
    • Turbidity measurement (Secchi)
    • Four field trips done so far - Nov. 08, Feb. 09, May 09 & Aug 09
    • Experience shows only 3 sites can be sampled in one day
  • 7. Scraggy Lake sampling sites
  • 8. Instrumentation
    • Laboratory chemical analysis
    • YSI 650 water quality probe
    • Secchi disk
    • GPS
    • Photography
    • (YSI and Secchi provided by Community Based Environmental Monitoring Network, Saint Mary's University)
  • 9. What is measured?
    • Water chemical analysis is "ICP" (Inductively Coupled Plasma) plus separate analysis for nitrate, mercury.
  • 10. What is measured?
    • Water quality with YSI 600QS probe
      • Temperature
      • Conductivity
      • Dissolved oxygen
      • pH
  • 11. Cost and funding
    • Cost
    • Labour: 12-hour days for two people
    • Equipment: Car, GPS, laptop, canoe, ice auger, camera
    • Water chemical analysis, $141.25/sample
    • Instrumentation: YSI probe borrowed from St. Mary's
    • Funding
    • Halifax Regional Municipality?
    • Nova Scotia Public Interest Research Group "Dedicated to research, education, and action on issues of social and environmental justice"
    • Other ideas?
  • 12. Looking ahead
    • Need expert review of results to put them into context
    • Need to find a way to measure cyanide concentration
    • Make data available on-line
    • Publicize campaign
    • Find funding