Community-based water quality monitoring of Scraggy Lake <ul><li>Dan Hutt </li></ul><ul><li>Eastern Shore Forest Watch </l...
Scraggy Lake <ul><li>A major lake on Nova Scotia’s Eastern Shore </li></ul><ul><li>7 km long by 5 km wide </li></ul><ul><l...
<ul><li>Proponent: DDV Gold </li></ul><ul><li>Touquoy Gold Deposit </li></ul><ul><li>500,000 oz deposit </li></ul><ul><li>...
Threats posed by gold mine to Scraggy Lake and Fish River <ul><li>Excavation will release highly soluable arsenic. </li></...
Community-Based Environmental Monitoring for Scraggy Lake <ul><li>Create a database of water quality measurements </li></u...
Water quality monitoring plan <ul><li>Proposed by Matt Coady, Kendrick Ball and Patricia Egli </li></ul><ul><li>Four sampl...
Scraggy Lake sampling sites
Instrumentation <ul><li>Laboratory chemical analysis </li></ul><ul><li>YSI 650 water quality probe </li></ul><ul><li>Secch...
What is measured? <ul><li>Water chemical analysis is &quot;ICP&quot; (Inductively Coupled Plasma) plus separate analysis f...
What is measured? <ul><li>Water quality with YSI 600QS probe </li></ul><ul><ul><li>Temperature </li></ul></ul><ul><ul><li>...
Cost and funding <ul><li>Cost </li></ul><ul><li>Labour: 12-hour days for two people </li></ul><ul><li>Equipment: Car, GPS,...
Looking ahead <ul><li>Need expert review of results to put them into context </li></ul><ul><li>Need to find a way to measu...
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Esf Ws Scraggy Monitoring Program 091024

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Esf Ws Scraggy Monitoring Program 091024

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

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