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AHMP - North Star Chapter CHMMunity Project
Voyageurs National Park Lyle Mine Remediation
Part 1: Lyle Mine Environmental Site Assessment
Loren Larson, Caltha LLPProject LeaderJune 25, 2005
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Lyle Mine
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Lyle Mine
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Lyle Mine Environmental Site Assessment
What is an ASTM Phase I ESA?
• American Society for Testing and Materials
– Phase I of 3– Environmental Site Assessment Process – E 1527-00
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Lyle Mine ESA
• Assess for releases of hazardous substances or petroleum products
• Identify Recognized Environmental Conditions (REC’s)
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PHASE 1ESA
1. History2. Site Visit
3. Regulatory
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PHASE 1ESA
1. History2. Site Visit
3. Regulatory
3. Water Sampling
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Lyle Mine Island – History
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Site Risk Evaluation• Research Historical Data • Maps and Aerial Photographs
– National Park Service Checklist for Monitoring Active and Abandoned Solid Minerals Operations
– Interviews– Vermillion Iron Journal– Rainy Lake Journal– Bureau of Mines Report
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Site Risk Evaluation• Rainy Lake Journal, 3-14-1895
– “put in a complete electric light plant for use in the camp, mill, shaft house and mine.”
– “A carload of dynamite is now on the way here and we have just completed a powder house that we consider safe and one that is bullet proof, in case of careless handling of firearms.”
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Site Risk Evaluation• Rainy Lake Journal, • Vermillion Iron Journal 1894-1897
– Up to 5 Shafts started– One Shaft was ~100’ deep– East and West veins
• Extend ~10’ on each side• At ~ 50 feet
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Site Risk Evaluation• NPS Abandoned Operations
Checklist 1989– Safety Hazard Rating – 1 (from 2)
• Former Occupant – Provided Limited Access
• No Longer Occupied (2003)– Risk Changed From Limited to High
• Currently Open to the Public– Environmental Hazard Rating - 3
• Conditions confined to site
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Site Risk Evaluation•What about from 1895 to 2003?•Historical Relevance Interviews
–Seasonal cabin 1950’s to 2003•Debris Disposal in Shaft•Waste Disposal in Shaft•Solid Waste Around Island
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Site Visit
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WATER SAMPLING
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WATER SAMPLING
• What parameters?– Input from MPCA, past NPS survey,
site history• How to collect samples?• How deep is shaft?• How many samples?
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Determining Depth
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Data collection• YSI (define) to Determine
Measurable Parameters– pH – Dissolved Oxygen – Temperature– Conductivity – Oxygen Reduction Potential (ORP)– Specific Conductance– Pressure
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YSI Data Collection
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Conductivity Specific Conductance
-80.00
-70.00
-60.00
-50.00
-40.00
-30.00
-20.00
-10.00
0.000.000 0.050 0.100 0.150 0.200 0.250
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Dissolved Oxygen DO (mg/L)
-80.00
-70.00
-60.00
-50.00
-40.00
-30.00
-20.00
-10.00
0.000.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00
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Dissolved Oxygen DO (mg/L)
-80.00
-70.00
-60.00
-50.00
-40.00
-30.00
-20.00
-10.00
0.000.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00
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SamplesSpecific Conductance
-80.00
-70.00
-60.00
-50.00
-40.00
-30.00
-20.00
-10.00
0.000.000 0.050 0.100 0.150 0.200 0.250
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Sample Analysis• Total Suspended Solids• Metals (RCRA and others)• Cyanide• Nitrogen• Biological Oxygen Demand (BOD)
– 5 Day• Fecal Coliforms
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Comparison to WQ Standards8 ft8 ft 30 ft30 ft 65 ft65 ft StandardsStandards
Aluminum (Al) ug/L 3,2703,270 285285 90.690.6 125/1072
Antimony (Sb) ug/L 5.15.1 0.940.94 0.340.34 55/90
Arsenic (As) ug/L 5.85.8 2.42.4 1.61.6 2/360
Cadmium (Cd) ug/L 1.41.4 0.170.17 <0.10<0.10 0.66/15
Chromium (Cr) ug/L 5.95.9 0.890.89 0.760.76 11/16
Copper (Cu) ug/L 3939 66 22 6.4/9.2
Lead (Pb) ug/L 100100 17.617.6 4.34.3 1.3/34
Nickel (Ni) ug/L 4.64.6 2.02.0 1.51.5 88/789
Selenium (Se) ug/L 0.550.55 0.670.67 0.710.71 5/20
Silver (Ag) ug/L <0.20<0.20 <0.20<0.20 <0.20<0.20 0.12/0.61
Thallium (Tl) ug/L <0.10<0.10 <0.10<0.10 <0.10<0.10 0.28/64
Zinc (Zn) ug/L 563563 52.252.2 22.222.2 59/65
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Total Suspended Solids
TSS (mg/L)
-70
-60
-50
-40
-30
-20
-10
00 50 100 150 200 250 300 350 400 450
Standard30 mg/L
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Calcium & Potassium
-70
-60
-50
-40
-30
-20
-10
00 20,000 40,000 60,000 80,000 100,000 120,000 140,000 160,000
CaK
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Summary of Environmental IssuesIssue Likelihood Severity UncertaintySolid waste in mine
High Low-Moderate Low
Other solid wastes High Low Low
Mine water Dependant on management
Low-Moderate Low
Asbestos High High Low
Other shafts Moderate- High
Low-Moderate Moderate
Explosives Low Low-High, depends on management
High
Other hazardous wastes
Low Moderate-High Moderate
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Using ESA results for future recommendations• Options for securing Lyle Mine
shaft– Fencing– Signage– Foam– Other fill– Discussion
