AQU QUATIC TIC EF EFFECT FECTS S MO MONI NITORING ORING PR - - PowerPoint PPT Presentation
AQU QUATIC TIC EF EFFECT FECTS S MO MONI NITORING ORING PR PROGR OGRAM MVLWB Technical Session Snap Lake Mine Final Closure, and Water Licence and Land Permit Renewal July 16 to 18, 2019 PUBLIC LIC PRESEN ENTATION ION OUTL TLINE
MVLWB Technical Session Snap Lake Mine Final Closure, and Water Licence and Land Permit Renewal July 16 to 18, 2019
PUBLIC LIC PRESEN ENTATION ION
1
OUTL TLINE
2
Stressors of Potential Concern:
discharge (increasing over time)
pumped discharge; RO treatment (starting 2018)
discharge
uncontrolled runoff
AQUATI TIC EFFECTS ECTS MONITORING ORING PROGRAM OGRAM (AEMP) P) - OVERVIEW EW
10,000 20,000 30,000 40,000 50,000 60,000 70,000 2004 2006 2008 2010 2012 2014 2016 2018 2020 2022 2024 2026 2028 Daily Effluent Discharge (m3) Year
Stopped Pumping Water from Underground to Surface Closure and Post-Closure ECM Operations
Year (Monitored Data) (Predictions)
3
AQUATI TIC EFFECTS ECTS MONITORING ORING PROGRAM OGRAM (AEMP) P) – PROPO POSED ED CHANGES GES
Compone
nt Operati ation
ECM Closur ure e Po Post-clos losure ure Water Quality Yes Yes Yes (Annual) Yes (Annual)** Toxicity Yes Yes Yes (Annual) Yes (Annual)** Sediment Yes Yes Yes (Once)
Yes Yes Yes (Once)
Yes Yes Yes (Once)
Yes Yes Yes (Once)
Yes Yes
Yes Yes
Yes Yes Yes (Annual) Yes (Annual)*** Special Studies Yes
wer comment nts:
* = Will occur as necessary to verify results of fish health and fish tissue chemistry programs ** = Monitoring continues for at least 3 years and then until concentrations stabilize or decrease. *** = Monitoring continues until concentrations stabilize or decrease.
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AQUATI TIC EFFECTS ECTS MONI NITORING ORING PROGRA OGRAM M (AEMP) MP) – PROPOS POSED ED CHA HANGES NGES – MIXIN XING G ZONE
What at Phase Frequenc ncy Timing ing Number of Statio ions ns Water Quality and Toxicity (Mixing Zone) Closure (Active) Water Qualit lity and Toxicit ity: Annually Water Qualit lity: open- water, monthly during discharge Toxicit ity: open-water, once during discharge 2 stations around each discharge location:
Water Qualit lity: Once every 3 years Water Qualit lity: ice- covered, once 2 stations around each discharge location:
Post-closure (Passive) Water Qualit lity and Toxicit ity: Annually, until water quality in Snap Lake has stabilized
Water Qualit lity and Toxicit ity: open-water, once 2 stations around each discharge location:
Water Qualit lity: Once within the first three years of Post-closure Water Qualit lity: ice- covered, once 2 stations around each discharge location:
Reviewe wer comment nts:
5
AQUATI TIC EFFECTS ECTS MONI NITORING ORING PROGRA OGRAM M (AEMP) MP) – PROPOS POSED ED CHA HANGES NGES – WATER ER QUALI ALITY
Where Phase Frequenc ncy Timing ing Number of Statio ions ns Snap Lake (main basin, NWA), Northeast Lake Closure (Active) Annually Open-water,
Main Basin: 5 NWA: 2 (1 field measurements only) NEL: 4 ( 1field measurements only) Once every 3 years ice-covered,
Main Basin: 5 NWA: 2 (1 field measurements only) NEL: 4 (1 field measurements only) Post- closure (Passive) Annually, until water quality in Snap Lake has stabilized or concentrations are decreasing Open-water,
Main Basin: 3 NWA: 1 NEL: 4 (1 field measurements only) (once within first three years) Once within the first three years of Post- closure ice-covered,
Main Basin: 3 NWA: 1 NEL: 4 (1 field measurements only) Downstream Closure (Active) Annually ice-covered,
Open-water,
LCB outlets: 2 KING01: 1 MacKay Lake: 2 Post- closure (Passive) Annually, until downstream TDS concentrations have stabilized or are decreasing ice-covered,
LCB outlets: 2 MacKay Lake: 2
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AQUATI TIC EFFECTS ECTS MONI NITORING ORING PROGRA OGRAM M (AEMP) MP) – PROPOS POSED ED CHA HANGES NGES – SEDIMENT ENT AND BIOL OLOG OGY
Phase Compo ponen ent Freque quency cy Lakes kes Closure (Active) Sediment Quality* One close-out program Snap Lake (discontinue SNP stations) and Northeast Lake Plankton* One program - if plankton community is within normal range and returning to baseline conditions, no additional programs Snap Lake and Northeast Lake Benthic Invertebrates* One program - if benthic invertebrate community is within normal range and returning to baseline conditions, no additional programs Snap Lake and Northeast Lake Fish* One program - if fish health parameters within normal range and returning to baseline conditions, no additional programs Snap Lake and Lake 13 Post- closure (Passive) No program unless triggered by water quality and/or toxicity results
*Following ECM study design Reviewe wer comment nts:
7
AQUATI TIC EFFECTS ECTS MONI NITORING ORING PROGRA OGRAM M (AEMP) MP) – SNAP LA LAKE SAMPLI PLING NG LOCATION TIONS
Water Quality Monitoring Station Sediment Quality Monitoring Station Benthic Invertebrate Monitoring Station Plankton Monitoring Station Toxicity
Reviewe wer comment nts:
Post-Closure Closure (Pa Pass ssiv ive) e) Closur sure e (Act Activ ive) e)
"
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MAIN BASIN6
I17 SNA.P11A 8
AQUATI TIC EFFECTS ECTS MONITORING ORING PROGRAM OGRAM (AEMP) P) – BENCHMARK CHMARKS
Reviewe wer comment nts:
Edge of the Mixing Zone in the Main Basin
1 2 3 4 5 6 7 8 9 10 2018 2020 2022 2024 2026 2028 2030 2032 2034 2036 2038 2040 2042 2044 2046 2048 Nitrate, as N (mg/L) Year AEMP Benchmark Minus 25% NO3-N = 25 ECM Closure Post-closure
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AQUATI TIC EFFECTS ECTS MONITORING ORING PROGRAM OGRAM (AEMP) P) - ANALYSES ES
Reviewe wer comment nts:
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AQUATI TIC EFFECTS ECTS MONITORING ORING PROGRAM OGRAM (AEMP) P) - ANALYSES ES
Reviewe wer comment nts:
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evaluation report after the collection of biological data to evaluate trends in water quality and biological metrics
water quality are not expected to cause adverse effects
AQUATI TIC EFFECTS ECTS MONITORING ORING PROGRAM OGRAM (AEMP) P) – REPOR ORTING TING
Reviewe wer comment nts:
12 12
AQUATI TIC EFFECTS ECTS MONITORING ORING PROGRAM OGRAM (AEMP) P) - SUMMAR ARY