Overview Torch Lake Superfund Remediation Project

Information about Overview Torch Lake Superfund Remediation Project

Published on January 22, 2008

Author: Tirone

Source: authorstream.com

Content

Torch Lake Superfund Site Remediation Monitoring: Fall, 2002 Sampling Overview and Results:  Torch Lake Superfund Site Remediation Monitoring: Fall, 2002 Sampling Overview and Results Presented by: Brenda R. Jones United States Environmental Protection Agency 77 West Jackson Blvd (SR-6J) Chicago, Illinois 60604 (312) 886-7188 [email protected] Objectives:  Objectives Brief intro to Superfund Overview of fall 2002 sampling efforts Summary of results What is Superfund?:  What is Superfund? Superfund: Program to clean up hazardous waste sites to protect human health and the environment. Superfund is managed by the U.S. Environmental Protection Agency MDEQ Project Mgr: Mary Schafer Torch Lake Clean-Up Objectives:  Torch Lake Clean-Up Objectives Reduce/minimize: risks from inhaling airborne stamp sands risk from contact with or ingestion of slag. risk of contaminants getting into groundwater risk of stamp sands released to sediments or surface water Reduced risk of stamp sands released to sediments or surface water:  Reduced risk of stamp sands released to sediments or surface water Protection of benthic orgs Benthic orgs are part of the aquatic food chain Stamp sands can interfere with ecological function of the site Torch Lake Superfund Site Locations:  Torch Lake Superfund Site Locations 1 = Calumet Lake 2 = Calumet Poor Rock 3 = Boston Pond 4 = North Entry 5 = Michigan Smelter 6 = Quincy Smelter 7 = Isle-Royale 8 = Dollar Bay 9 = Gross Point 10 = Gross Point 11 = Baltic/Atlantic Stamp Mills 12 = Adventure/Trimountain/ Champion Stamp Mills 13 = Torch Lake: Lake Linden, Hubbell/Tamarack Mason sites 13 Blowing Stamp Sands:  Blowing Stamp Sands Soil and plant cover over mine waste piles to stop continued erosion of stamp sands into the lake. Thereby speeding up natural recovery of lake’s sediments. Torch Lake Remedy:  Torch Lake Remedy Objective: prevent further erosion of stamp sands into lake(s) 6 inches soil with vegetative cover Vegetation consists of legumes and grasses Most not native to U.S. or Michigan Legumes Grasses Red clover ryegrass Alfalfa fescue (2 sp) trefoil Cover layer:  Cover layer Superfund Work Completed:  Superfund Work Completed 13 Has the habitat been improved due to the remediation?:  Prior to implementation, the stamp sands were: poor habitat (fertility, moisture, surface temp) mostly devoid of vegetation Has the habitat been improved due to the remediation? Devoid of vegetation or low quality habitat:  Devoid of vegetation or low quality habitat Bad news Good news:  Good news Adjacent potential source areas Ecological Study:  Ecological Study Implemented in 2002 to address the following question: What impact is the remedy having on terrestrial habitats? 2002 Ecological Study:  2002 Ecological Study Small mammal survey Plant survey Bird survey GPS - whole site and all sampling locations Five Study Areas:  Five Study Areas Remedy Completion of Four Study Areas:  Remedy Completion of Four Study Areas Gay Sands Map:  Gay Sands Map Lake Linden Map:  Lake Linden Map Hubbell/ Tamarack Map:  Hubbell/ Tamarack Map Mason Map:  Mason Map Point Mills Map:  Point Mills Map Mammal survey:  Mammal survey 80 sherman live traps at each location (400 traps) 3 – 4 habitats at each location Mammal survey:  Mammal survey Checked 2x daily for 2 days Variety of habitats sampled (remediated and unremediated) Plant Community Survey:  Plant Community Survey Biomass Root penetration Fertility Coverage Species ID Plant Community Survey:  Plant Community Survey At each of the 5 locations: 20 random sampling points and 5 biased sampling point 3 – 4 distinct habitats Total = 125 sampling points Bird Community Observations:  Bird Community Observations Qualitative Visual Auditory Results of 2002 surveys:  Results of 2002 surveys Slide29:  Time Zero Site – Gay Sands Point Mills Area - Before Remedy in Fall:  Point Mills Area - Before Remedy in Fall Point Mills Area – Year 1 Spring:  Point Mills Area – Year 1 Spring Tamarack and Hubbell sites before and after :  Tamarack and Hubbell sites before and after Before Photos: Gary Aho, NRCS Slide33:  Tamarack and Hubbell sites before and after Mason area before remedy:  Mason area before remedy Photo credits: Gary Aho, NRCS Mason area after remedy:  Mason area after remedy Lake Linden site after remedy:  Lake Linden site after remedy 2002 Results – Bird Survey:  2002 Results – Bird Survey # of bird species Lake Linden – 19 Tamarack – 13 Mason – 11 Point Mills – 15 Gay - 15 Results – Plant Survey:  Results – Plant Survey Remember we only planted 6 species # plant species Lake Linden – 17 Tamarack – 13 Mason – 19 Point Mills – 5 Gay – 7 Total = 76 species ?? Soil Fertility - Calcium:  Soil Fertility - Calcium Low: 690 – 1130, Med: 1130 – 1570, High: 1570 – 2000, Very High: >2000 From Table 6 Soil Fertility - Magnesium:  Soil Fertility - Magnesium Low: 53 - 93, Med: 94 – 160, High: 161 - 330, Very High: >330 From Table 6 Soil Fertility - Phosphorous:  Soil Fertility - Phosphorous Low: 28 - 50, Med: 51 - 80, High: 80 - 153, Very High: >153 From Table 6 Soil Fertility - Potassium:  Soil Fertility - Potassium Low: 46 - 91, Med: 92 - 162, High: 164 - 310, Very High: >310 From Table 6 Soil Fertility - Copper:  Soil Fertility - Copper Low: 0.5, Med: not determined, High: 20, Very High: not determined From Table 6 Results –Mammal Survey:  Results –Mammal Survey At least 15 species (7 trapped) ~ 15 % trap success Observed directly or saw signs of: red fox, skunk, deer, black bear, squirrel, raccoon # mammal captures Lake Linden – 15 Tamarack – 35 Mason – 20 Point Mills –0 Gay – 0 Gay surrounding area - 55 Biodiversity Summary:  Biodiversity Summary What does this all mean?:  What does this all mean? Remedial action created diverse habitat where none existed before. Increased Biodiversity:  Increased Biodiversity Biodiversity (number of species) much greater than expected Biomass (numbers of individuals) much greater than expected Soil fertility increased after remedy

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