The Sonic Plus Water Treatment System is a portable standalone water treatment device that uses sonication technology to enhance water quality and reduce aquatic toxicity. The Sonic Plus is a flow through device that recirculates water through the unit discharging the treated water back into soil. Sonic Plus Water Treatment System Restoring Water Quality in a Lake Assembly of Sonic Plus Water Treatment System Inline Sonic Plus water treatment unit (Red value) installed into an irrigation system Sonic Plus Water Treatment System Restoring Water Quality in a Lake 1/4 The Sonic Plus water treatment system is a proprietary, patent pending, portable standalone water treatment device that uses sonication technology to enhance water quality and reduce aquatic toxicity. This technology organically restores impacted water bodies and holds the potential of replacing the current practice of applying harmful chemical shock treatment to water. The Sonic Plus is a flow through device that recirculates water through the unit and discharges the treated water back into the soil, groundwater table or surface water body. This technology can be used to restore the water quality in lakes, streams, and ground water aquifers. During the past several years, the Sonic Plus has been demonstrated to reduce elevated levels of Cyanobacteria (blue-green algae) in surface water, conserve irrigation water usage, increase crop production, enhance livestock hydration, produce more farm animal offspring, increase milk quantity and quality, and improve the overall health to livestock. Agricultural Irrigation Surface Water Treatment Agricultural Irrigation Our patent pending Sonic Plus technology has been proven in the agricultural industry. Our initial agricultural application installed the Sonic Plus to a center pivot irrigator to conserve water usage. While this application was successful in conserving the amount of water pumped into the soil, we discovered the system also acted as a yield-enhancer for row crops. This system is now routinely used by many row crop farmers to cut their irrigation costs, while improving their crop yield per acre. The below picture tells the Sonic Plus story. Clean water irrigation technology not only conserves water but enhances row crop yield to improve the bottom line for farmers. Two neighboring fields: the field in the foreground used the Sonic Plus technology on a center pivot irrigator, while the field in the background (north of the road) used a standard center pivot irrigator. Note the improved health and growth rate of the crops by using Sonic Plus water enhancement. This agricultural technology is not just limited to the row crop farmer. Our technology has also been applied to livestock production. For many years, people have looked for a more natural or organic method of livestock production. Much of this organic movement has centered around the elimination of chemicals, additives and growth hormones to livestock and their food source. However, the water or hydration of the animal has been the forgotten factor. That is until now. For three years, the Sonic Plus has been installed into the water delivery system at a local diary. This system has provided a cleaner and more healthy water source for the dairy cows and the results are nothing short of astounding. The dairy saw improved health in every measurable category, birth rate, growth rate and milk production, etc. The table and graph below depict how cleaner and healthier hydration of milk cows translates to greater profitability for the dairy. Surface Water Treatment For the past 5 years, we have been using the Sonic Plus water treatment system for the restoration of surface waters that are impaired with Cyanobacteria or blue-green algae as it is commonly referred to. The Sonic Plus treatment system is suspended in the water column, so water can be continuously pumped through the proprietary sonic tube to generate sound frequencies. These sonic frequencies enhance the water’s natural physical properties and reacts as a catalyst throughout the water column to reduce toxic levels of blue-green algae. The Sonic Plus treatment system has demonstrated a significant reduction of blue-green algae in several popular recreation lakes, private ponds and decorative fountains. In the Summer of 2016 and 2017, the Sonic Plus water treatment system was placed in operation at the outlet of Lake Crystal. Below are the before and after photos of Minneopa Falls, which is approximately 12 miles downstream from the outlet of Lake Crystal. Note, the reduction of blue-green algae and the improved water clarity of the Minnopea Falls during the Sonic Plus operation period. 2016 Crystal Lake Recap and Minneopa Falls Historically Impaired Water, Minneopa Falls Pre-Sonic Plus Water Treatment System 2014 Lake Crystal Outlet Restored Water Quality, Minneopa Falls Post-Sonic Plus Water Treatment Project 2016-2017 in Lake Crystal Outlet Today our surface water restoration work is expanding. The implementation and application of this system continues to show positive results for multiple water quality parameters with direct evidence of suppression of cynobacteria levels and improvement in desired oxygen levels. The positive results of suppression of bacteria levels and improved oxygen levels also appears to effect: a reduction of invasive species, regeneration of native plants, increase in the population of desired game fish. Continued testing seems to confirm other water quality and environmental benefits from using this groundbreaking technology.

Environmental Troubleshooters, Inc. (ET) is a comprehensive environmental consulting and contracting firm that was established in 1995.  During our history, we have conducted over 2,000 projects regulated under Superfund, Petroleum Remediation and Brownfields. Call us today for environmental consulting and contracting, emergency response, environmental site assessments (ESAs), tank removals and more! Click here to watch a video about our stream restoration project on the Knife River. Stream Channel Realignment Tank Removal Trout Stream Bank Stabilization Stream Channel Realignment 1/5 Click the photos to enlarge them. Environmental Troubleshooters Inc Headquarters 3825 Grand Ave Duluth, MN 55807-2850 Tel: 218-722-6013 Environmental Troubleshooters Inc Regional Office 416 Fayal Road, Ste. A Eveleth, MN 55734 Tel: 218-744-0128 Environmental Troubleshooters Inc Regional Office 3100 Courthouse Lane Eagan , MN 55121 Tel: 612-616-9244

Various news outlets have covered ET's work. Some of our projects that made headlines include: our Knife River restoration, our analysis of the Morgan Park Construction Site, the Grand Marais Wetland Restoration Project, grease in the Duluth storm sewer system and a major gasoline leak in Ely. ET in the News Restoring Glory: Knife River Facelift Advances More Soil Issues found at Proposed Morgan Park Construction Site Bad News for Grand Marais Wetland Restoration Project Click any of the blue buttons and scroll down to read news articles that highlight our company. Redevelopment's Environmental Work Along the Knife River, Kevin Bovee waded through the waist-high ferns along the riverbank and stopped at the water's edge. Across the narrow stream, a good jumper could clear it in a single bound, a wall of bare clay reached high above the river. Grease Ooozes into Harbor Analysis has uncovered additional contamination and soil issues on a 15-acre Morgan Park site where Ikonics Corp., a maker of image technologies, hopes to build a new production facility. Craig Wilson, owner of Environmental Troubleshooters, said his Duluth-based firm has identified a few "hot spots" containing heavy metals and petroleum products on the property that was formerly home to Atlas Cement. Major Gasoline Leak in Ely An idea brought forth by David Demmer of Cook County Planning & Zoning to restore a portion of the Grand Marais Recreational Park to its original wetlands state received blowback after an environmental engineer reviewed the almost two-acre site and found quite a few problems with it. Grand Marais Power Plant Hundreds of gallons of used kitchen grease oozed into the Duluth storm sewer system after Monday's accident downtown, and some of the grease flowed into Lake Superior, the Minnesota Pollution Control Agency said Wednesday. Environmentally Friendly To understand Craig Wilson's passion for his profession, you have to go back about 50 years. It was a spring day in 1976, and Wilson found himself peering over the Lester River Bridge on London Road. A gasoline leak, originating from a broken underground feed line at the Holiday Station on Sheridan Street, led to thousands of gallons of gasoline leaking into the city's sanitary and storm sewer system earlier this week. The Grand Marais Public Utilities Commission began demolition of the old power plant near Grand Marais Recreation Park campground last week. Edwin E. Thoreson, Inc. is performing the demolition for an estimated $38,000. The PUC worked with Environmental Troubleshooters, Inc. on some environmental cleanup inside the facility before the demolition began Back to the top Back to the top Back to the top Back to the top Back to the top Back to the top

As the economy starts to reopen and the second wave of infections are predicted, business sanitation to keep employees and customers safe is of paramount importance to all employers.  To help business through these COVID-19 issues, ET is available to provide COVID-19 response services. COVID-19/Coronavirus Disinfecting COVID-19 Employers have been shut down for several months during the COVID-19 pandemic. As the economy starts to reopen and the second wave of infections are predicted, business sanitation to keep employees and customers safe is of paramount importance to all employers. To help business through these COVID-19 issues, Environmental Troubleshooters, Inc. (ET) is available to provide COVID-19 response services. COVID-19 Services Response to COVID-19 outbreaks. Disinfecting contaminated facilities. Develop site-specific cleaning, disinfecting, and sanitation plans. Provide OSHA Compliant Infectious Agent, Respiratory Protection and Personal Protection Equipment (PPE) written plans. Perform Inhouse OSHA Employee Training for COVID-19 Infectious Agents, Hazard Communication/Employee Right to Know, Respiratory Protection and PPE. Disinfecting and Surface Cleaning For over two decades, ET has provided fungus and bacteria remediation services. To address the current COVID-19 pandemic, ET has now implemented new safety measures, established virus specific cleanup procedures and expanded our line of disinfectant equipment. During a COVID-19 response ET will provide: Trained personnel equipped with Tyvek suits, gloves and respirators. We have qualified staff that has been trained in various disinfecting techniques and will wear personal protective equipment that exceeds CDC recommendations. Disinfecting equipment. For largescale projects, ET typically uses industrial sprayers to fog and mist down horizontal and vertical surfaces. For small-scale projects, ET uses hand-held foggers to disinfect a specific area, equipment or structure more discretely. Use of CDC and EPA disinfectants. ET uses a specialized ozone-based disinfectant that is CDC and EPA recommended and a less toxic alternative to the standard bleach or ammonia-based disinfectants that are traditionally used. Our disinfectant does not leave an odor, fade furnishings or damage building surfaces.

Email a resume and cover letter at cwilson@etsmn.com if you are interested in working for Environmental Troubleshooters. Employment Opportunities If you are interested in working at Environmental Troubleshooters, email a cover letter and resume to cwilson@etsmn.com .

Before any building can be redeveloped, including remodeling or demolished, an Asbestos Inspection and Hazardous and Regulated Waste Assessment must be conducted.  ET can perform these inspections / assessments and assist the developer in determining the cost to conduct abatement. Hazardous/Regulated Materials Before any building can be redeveloped, including remodeling or demolished, an Asbestos Inspection and Hazardous and Regulated Waste Assessment must be conducted. ET can perform these inspections / assessments and assist the developer in determining the cost to conduct abatement. Lead Based Paint Inspection Regulated Waste Lead Based paint Inspection ET can assist clients by determining if a lead paint hazard exists in your building, facility or structure. We conduct lead inspections and collect samples to determine if a lead hazard is present and to what extent. If lead levels are above action level, we assist clients and contractors to comply with the lead in paint standards, so the project can move forward. Sampling Lead Based Paint with an XRF Flaking Lead Based Paint An XRF on a charger Sampling Lead Based Paint with an XRF 1/3 Regulated Waste Regulated wastes typically include commercial or household products that contain regulated chemicals, heavy metal containing products, treated woods, light ballasts, electronics, and white goods and must be removed and disposed of prior to demolition of a building. Commonly, observed regulated waste include household chemicals, paints, florescent light tubes, florescent light ballasts, lead acid batteries, mercury thermostats, green treated or creosote treated wood and electronic. ET assists clients by performing a pre-demolition assessment to determine if these and other hazardous/regulated products exist in a building. We compiled a list of observed wastes and remove the items from service. Finally, we look for recycling option to minimize disposal charges. Hazardous Waste Before Cleanup Segregating Waste Chemical Products Hazardous Waste 1/11

ET's environmental consulting and contracting projects have been recognized in the form of awards. Look through our awards to see some of the work we've done. Awards 2013 Minnesota Brownfields ReScape Award Economic Impact Project of the Year Canal Park Brewing Brownfields Redevelopment Project 2015 ReScape Community Impact Award Economic Impact Project of the Year Steve O'Neil Apartments Brownfields Redevelopment Project

Visit this page every Monday for our weekly press releases, which will keep you informed on all the latest breaking news happening at Environmental Troubleshooters! Press Releases Visit this page every Monday for our weekly press releases. July 13 - Phase 5 of Knife River Restoration Project Environmental Troubleshooters, Inc. has been awarded the fifth Phase of the Knife River Restoration project. This project will stabilize streambanks, create spawning redds and improve trout rearing habitat in the lower 2,500 liner feet of Reach 4. The project also includes the survey of approximately 2 miles of stream between Lake County Highway 11 and Lake County Highway 9, the restoration design to stabilize an eroding streambank in Reach 13 and removal of flood debris from the Lower Knife River Falls and Cable Hole. July 3 - New Employee Emma Burgeson Emma Burgeson has joined Environmental Troubleshooters, Inc. as an environmental scientist and field technician. She graduated with her Bachelor of Science in Environmental Science from Western Washington University and her Master of Science in Water Resources Science from the University of Minnesota. She brings a background in ecology, hydrology, and geomorphology that will add to our stream restoration services. Additionally, Emma is an FAA licensed drone pilot and plans to use video and photogrammetry to monitor the extent of spills and aid in stream assessment surveying. April 21 - ET Wins Bid For Petroleum Soil Excavation Environmental Troubleshooters won the State of Minnesota bid for the Petroleum Soil Excavation at the former Jeff’s Super Service in Greenbush, Minnesota. The project scope of work includes the excavation of contaminated soil, the pumping of contaminated ground water, landfill disposal of petroleum contaminated soils and backfilling the excavation. March 30 - New Employee Brett Bjergo Brett Bjergo joined ET in February of 2020 as a field scientist. Mr. Bjergo received his Bachelors of Science degree in Geological Science and a minor in Environmental Science from the University of Minnesota – Duluth. His primary role is to conduct soil and groundwater sampling, perform Phase I and II assessments and respond to environmental emergencies. Mr. Bjergo’s previous work experience consists of disaster response, remediation and cleanup and preserving/restoring native prairies. January 26 - New Stream Project Environmental Troubleshooters was awarded the North Fork of the Zumbro River Channel Restoration project in January 2021. The project includes the excavation of 30,000 cubic yards of soil, placement of 400 cubic yards of rip rap, installation of 400 linear feet of toe wood, planting of 450 live willow stakes, construction of two instream riffle structure and the removal of a remnant dam. September 21 - New Boom and Skimmer The new Boom and Skimmer have arrived. Environmental Troubleshooters, Inc. has purchased 4,600 linear feet of Acme Containment Boom and a 36” Drum Skimmer. We are currently pursuing an OSRO with the Coast Guard to provide additional spill response resources to the Northland. September 7 - New Employee Camie Pederson Camie Pederson had 32 years of environmental safety experience prior to joining Environmental Troubleshooters. She is our primary emergency responder and project manager in the Twin Cities. Her emergency response experience ranges from small-scale petroleum dispenser spills to catastrophic tank/line failure involving the release of thousands of gallons of free petroleum product. August 31 - New Employee Brian Hayden Brian Hayden joined ET’s team in 2019 as a senior project manager. He has over 35 years of diverse environmental experience working in the consulting, governmental and private sectors. As an environmental geologist/hydrogeologist he has extensive background conducting site investigations and remediations, environmental site assessments, brownfield redevelopments, landfill permitting and closures and environmental compliance. Brian’s experience also includes 10 years as an Environmental Manager for a Class I railroad where he was responsible for environmental compliance and management of facilities located in Minnesota, Wisconsin, and Michigan. He specialties and expertise include emergency response and preparedness with having responded and managed small to national incidents. Brian’s able to assist ET clients with Stormwater Pollution Prevention Plans (SWPPPs), Spill Prevention, Countermeasures and Controls (SPCC) plans, emergency response planning and response management. August 24 - ET's New Equipment Environmental Troubleshooters has acquired new equipment. ET purchased an 80 BBL vacuum truck, as well as a brand new enclosed pressure washer trailer. The pressure washer trailer has hot, cold, and steam capabilities. ET has also acquired 4,600 feet of boom and a new skimmer. New Vaccuum Truck 1 New Vaccuum Truck 2 New Vaccuum Truck 4 New Vaccuum Truck 1 1/4 Pressure Washer Trailer 1 Pressure Washer Trailer 2 Pressure Washer Trailer 14 Pressure Washer Trailer 1 1/14 August 17 - ET's New Twin Cities Office Environmental Troubleshooters Inc. is excited to announce the opening of a new Twin Cities office. The office is staffed and ready to respond to your environmental needs, such as emergency response, industrial services, remediation, waste management, and vacuum truck transportation services. Please feel free to call us if you have any questions or need assistance.

ET employees have published a variety of articles on important environmental safety topics. We have written about the risks and rewards of brownfield redevelopments, vapor intrusions in commercial property, demolition and renovation project hazards and how to rehabilitate a river. Published Articles Click any of the blue buttons below and scroll down to read our articles. Winter's the Best Season to Plan your Site Redevelopment's Environmental Work Winter’s a great time to consider your next redevelopment project, because there’s time to assess and design, obtain approvals and permits, get a grant and be first to hit the ground. Here are tips on what to plan for. Vapor Intrusion in Commercial Property Acquisition and Development Savvy leaders and developers are familiar with performing environmental due diligence as part of acquiring commercial property, and the industry standard for due diligence is the Phase I Environmental Site Assessment (ESA). Brownfield Redevelopment has Risks - but also has Business Rewards From approximately 1988 to 1998, businesses that owned or operated petroleum underground storage tanks (USTs) were required to remove and/or upgrade their old tank systems to prevent environmental releases. Preliminary Assessments are Required to Address Renovation or Demolition Project Hazards If you’re planning to renovate or demolish a commercial or residential structure, specific preliminary assessments must be conducted to protect occupants and contractors - and protect you from personal liability. The three primary environmental building inspections include asbestos, lead-based paint and regulated waste. Evaluate Key Criteria before Redeveloping a Brownfield Site In previous Duluthian “Environment” articles, I’ve explained why brownfield properties can be a benefit to developers looking for their next project. This articles focuses on evaluating a project or property to determine if the fit is right for your plans. The Rehabilitation of a River The Knife River, about a 19-mile drive up the North Shore from Duluth, once held one of the largest populations of naturally-reproducing steelhead in the Great Lakes. However, since the early 1970s, the Knife River’s steelhead population has experienced a dramatic decline. One of the reasons for this decline is habitat loss. Back to the top Back to the top Back to the top Back to the top Back to the top Back to the top

ET offers a wide range of services, including 24-Hour Emergency Response, Site Investigation and Remediation, Due Diligence, Regulatory Compliance, Environmental Construction Services, Industrial Services, Stream Restoration, Wetland Consulting, Hazardous/Regulated Materials and other services. Placing Absorbant Boom Loading Stockpiled Soils Asbestos Re-Inspection – Spray-on Fireproofing Under a Drop Ceiling Placing Absorbant Boom 1/5 Services List of Environmental Services 24-Hour Emergency Response ET is a 24-Hour emergency provider that provides consulting response and contracting services for a wide range of incidents involving releases of petroleum, PCBs, VOCs, heavy metals and asbestos. We routinely get called to mitigate releases at bulk fuel plants and terminals, gas stations, railroads, roadways, ditches and culverts, groundwater, potable water wells, lakes, rivers, wetlands, sewer systems, street vaults, greenspaces, industrial facilities, commercial buildings and homes. Read more. Site Investigation and Remediation When a leak or spill has occurred and cleanup is necessary, we have remediation experience to select the appropriate site-specific cleanup technology. For complex projects, we thoroughly evaluate site parameters and conduct feasibility studies to develop multiple remediation options based on technical and budgetary constraints. This allows you to select the remedial option to meets your needs. Read more. Due Diligence ET works with developers, attorneys, lenders and municipalities to facilitate property transactions and redevelopment of contaminated sites, including: Environmental Site Assessments (ESAs) Phase I ESAs Phase II ESAs Brownfields Redevelopment Clean Up Grant Assistance and Response Action Plans (RAPs) Read more. Regulatory Compliance ET has developed a process for reviewing commercial and industrial facilities to better manage regulatory compliance issues. The procedure involves an in-depth review and evaluation of current permits and compliance requirements and the development of a Compliance Management Program. ET also provides compliance audits that allow facilities to check their working compliance program. Read more. Environmental Construction Services A unique advantage of selecting ET as a teammate to work on your environmental project is our Design Build expertise. Our approach to contract projects is to provide a full turn-key service that performs both the contracting and consulting work simultaneously. Our inhouse team, utilizes specialized remediation equipment operated by highly skilled and trained personnel. Read more. Industrial Services ET has an experienced industrial team of technicians that utilize specialized equipment to perform industrial cleaning, sludge removal, remedial system maintenance and waste disposal. Our industrial team is fully OSHA trained and certified in hazwoper, confined space, respiratory protection, personal protective equipment and asbestos, so we can handle complex projects safely and efficiently. Read more. Stream Restoration Wetland Consulting Hazardous/Regulated Materials Extensive logging removed riparian trees throughout many watersheds, which has led to deteriorating streambanks, a discharge of sediment and impacts to the stream channel. This continuous watershed instability negatively effects water temperature, sediment load and fish habitat. ET utilizes a restoration approach called Natural Channel Design to restore critical stream parameters. ET’s Natural Channel Design approach includes the: Read more. Wetland regulations have recently become an obstacle for many developers, realtors and property owners who want to build on their property. Many of these parcels of property were not originally designated as wetlands when the property was originally purchased. Due to the heightened importance of wetlands, many properties have been re-evaluated and are now listed as containing a considerable of wetlands and cannot be filled without a permit. The wetland services ET offers are: Read more. Before any commercial property can be redeveloped, including remodeling and/or demolition, State Law requires an Asbestos Inspection and Hazardous and Regulated Waste Assessment. ET can perform these inspections / assessments and assist the developer in determining the cost to conduct asbestos abatement and property sorting and disposal of regulated wastes. Read more. Sonic Plus Water Treatment System COVID-19/Coronavirus Disinfecting The Sonic Plus is a portable standalone water treatment device that uses proven properties of sonication technology to enhance water quality and reduce aquatic toxicity. This technology restores unhealthy water bodies organically and holds the potential of replacing the current practice of using of harmful chemicals to treat and remediate water bodies where elevated blue green algae, fecal coliform or E. coli bacteria levels exist. Read more. Employers have been shut down for several months during the COVID-19 pandemic. As the economy starts to reopen and the second wave of infections are predicted, business sanitation to keep employees and customers safe is of paramount importance to all employers. To help business through these COVID-19 issues, Environmental Troubleshooters, Inc. (ET) is available to provide COVID-19 response services. Read more.

A unique advantage of selecting Environmental Troubleshooters, Inc. as a teammate to work on your environmental project is our Design Build expertise.  Our approach to contract projects is to provide a full Turn-Key service that performs both the contracting and consulting work simultaneously. Environmental Construction Services A unique advantage of selecting Environmental Troubleshooters, Inc. as a teammate to work on your environmental project is our Design Build expertise. Our approach to contract projects is to provide a full Turn-Key service that performs both the contracting and consulting work simultaneously. Our inhouse team, utilizes specialized remediation equipment operated by highly skilled and trained personnel. This Turn-Key approach allows us the flexibility to make real-time decisions based on field observations without stopping work for multiple rounds of solicitations and change orders. This approach ultimately yields more data, higher quality results and a cost-effective project. Tank Removals Soil Excavation Compost Soil Treatment Soil Stabilization Remedial Compound Subsurface Injection Land Spread Soil Treatment Vapor Mitigation Tank Removals Lifting Tank out of the Excavation with a Crane Venting Tank Prior to Cleaning Tank Removals 1/4 Skid Steer Surface Soil Excavation Saturated Soil Excavation Contaminated Soil Excavation Skid Steer Surface Soil Excavation 1/8 Compost Soil Treatment Windrow Composting Contaminated Soil Controlling Runoff from Compost Pile Compost Soil Treatment 1/4 Land Spread Soil Treatment Spreading Contaminated Soil Tilling Contaminated Soil Land Spread Soil Treatment 1/3 Adding Heavy Metal Stabilization Compound In-situ Mixing of Stabilization Compound Heavy Metal Stabilization Complete Adding Heavy Metal Stabilization Compound 1/3 Remedial Compound Subsurface Injection Monitoring the Flow Rate of Multiple Injection Points Adjusting Injection Flow Rate Remedial Compound Subsurface Injection 1/7 Vapor Extraction from Sewer Line Vapor Removal from Basement Sewer Sealing Vapor Barrier Penetrations Vapor Extraction from Sewer Line 1/6

ET has conducted a wide range of projects throughout its years of service. Projects This page is currently under construction. Stay tuned for updates!