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. Asbestos Consulting Lead Based Paint Inspection Regulated Waste Asbestos Consulting ET’s asbestos services consist of inspecting, bulk sampling, patching and repairing, abatement designing, abatement monitoring, air sampling, employee training and record keeping. Our asbestos inspection services consist of 6-month periodic surveillances, annual damage assessments, accessible asbestos inspection and bulk sampling and demolition asbestos inspection and bulk sampling. All asbestos bulk samples are analyzed by an independent laboratory to avoid any conflicts of interest with the analysis. Asbestos abatement projects are designed using detailed work specifications. Each asbestos abatement project is bid out to obtain the best price for our clients. Our industrial hygienists closely oversee work practices to ensure proper removal procedures are followed. All projects are closely air monitored to ensure adjacent areas are not contaminated during abatement and abated spaces are cleared and safe to reoccupy. Asbestos Re-Inspection- Spray-on Fireproofing Under a Drop Ceiling Pre-Demolition Inspection - Thermal System Insulation on Pipes Hidden in a Wall Cavity Asbestos Abatement - Duration Air Monitoring and Project Oversight Asbestos Re-Inspection- Spray-on Fireproofing Under a Drop Ceiling 1/6 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 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

Site Investigation and Remediation Site Investigation Remediation Site Investigation Environmental Troubleshooters Inc. has a team of environmental scientists, geologists, and environmental professionals who have extensive experience designing work plans to investigate the release of hazardous chemicals and petroleum product. Our work plans determine the sampling strategy and drilling location/depth to adequately identify and delineate the magnitude and extent of a release. Our sampling strategies are based on our previous investigation knowledge and experience and we follow EPA requirements or state-specific guidance documents. Once a work plan is approved, we clear public and private utilities and advance soil borings, soil gas borings, sub-slab vapor points, test pits and/or utilize other investigative technologies (e.g. LIF borings, magnetometer surveys, etc.). Our standard soil sampling strategy includes collection of continuous sample cores to ensure no soil horizon is missed, and the use of dual-tube push probe sampling to provide accurate, discrete samples. ET personnel also have experience overseeing rotosonic, mud rotary, air rotary and bedrock coring drilling techniques. Borehole soil samples are typically collected at the highest photoionization detector (PID) value, highest x-ray fluorimeter (XRF) value, ground water table and/or bottom of the boring. Borehole water samples are typically collected using temporary wells to allow for sufficient ground water recharge providing adequate water volume for sample collection. Should permanent monitoring well be necessary, ET personnel install the wells according to state code with screened intervals in the saturated zone and adequate screen length to account for water table fluctuation when investigating petroleum or most-dissolved phase contaminants in shallow, unconfined aquifers. Deeper monitoring wells designed to assess dense non-aqueous phase liquids (DNAPL) are installed with submerged screens. ET follows strict boring and monitoring well decontamination procedures to ensure no cross-contamination exists during drilling and sample collection. Hollow Stem Auger Drilling in a Tank Containment Soil Sample Collection from Push Probe Sample Core Screening Soils for Heavy Metals with an XRF Hollow Stem Auger Drilling in a Tank Containment 1/5 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 meet your needs. ET personnel have extensive experience with the most common remediation options which typically include excavation and/or vacuum pump truck extraction of fuel and contaminated groundwater. Excavation may be required to address recent leaks/spills, during tank removal, and/or to address surface contamination which poses a direct contact and runoff risk. Soil disposal options include composting/biopiling, thermal treatment, asphalt batch incorporation, landspreading/land treatment, stabilization, and landfilling. ET projects have included complex excavations near utility lines, building footings and within buildings. With the more recent establishment of vapor intrusion (VI) standards for residential and industrial/commercial buildings, the requirement for vapor mitigation in these structures is becoming more common. ET is a licensed vapor mitigation contractor and ET personnel have extensive experience installing effective sub-slab vapor mitigation systems. Suction pits are drilled through the slab floor and a vacuum is applied initially with a shop vac. Vacuum field extension is measured using a micromanometer and vapor pins installed through the slab in strategic locations. Permanent vacuum lines are then installed and connected to a radon-type blower. In some cases, remedial systems are the most effective cleanup technology. We have experience with multi-phase extraction, soil vapor extraction, air sparging, bioventing, and other remedial system technologies. ET has designed, installed and successfully operated remedial systems targeting petroleum and chlorinated solvent releases. To ensure we have selected the best approach we optimize our system design using advanced computer modeling and pilot testing. ET personnel have installed/operated remedial systems for emergency response work and standard remedial work at gas stations, industrial and commercial sites, and are familiar with permitting, air emission and water discharge requirements. Environmental Troubleshooters Inc. also has extensive remedial experience with bioremediation via compound injection, which may include oxygen-release compounds, emulsified vegetable oils, bacteria inocculum, and various other solutions. In some cases, bioremediation may involve application of bacteria directly to spill areas. ET personnel have also conducted projects where multiple injection points over large industrial and military projects are required, with use of temporary tanks, dosing pumps and injection via push probe and other technologies. SVE Pilot System SVE Remedial System High Vacuum Extraction System SVE Pilot System 1/6

Booming off Boat Placing Hard and Absorbent Boom in the River Above Ground Storage Tank Overfill Booming off Boat 1/9 Environmental Troubleshooters, Inc. is a 24-Hour emergency provider that provides consulting and contracting services for a wide range of incidents involving releases of petroleum, PCBs, VOCs, heavy metals and asbestos. We are routinely 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. Our emergency response mobilizes a team of qualified professionals using state-of-the-art equipment. This Response Action may require the following scope of services: • Containment of free fuel or chemical product. • Recovery of free or contained product. • Collection of multi-media soil, groundwater, surface water and/or vapor samples to determine if additional corrective action is required. • Clear utilities. • Excavate area of contamination. • Clean residual contamination or fuel stained surfaces. • Collect excavations soil samples for disposal purposes and to document the cleanup project. • Perform follow-up sampling if residual contamination remains present. • Conduct a full investigation if the residual contamination is above action levels. • Design a remedial action plan to remove the residual contamination. • Provide a final closure report to the Client, Third Party(s) and Regulatory Agencies.

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

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

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

Contact Information Duluth Location 3825 Grand Avenue Duluth, MN 55807 Telephone (218) 722-6013 ​ (800) 470-3536 Submit Thanks for submitting! Eveleth Location 416 Fayal Road, Ste. A Eveleth, MN 55734 Telephone (218) 744-0128 ​ ​ Submit Thanks for submitting!

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.

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

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. Tank Cleaning Vacuum Truck Pumping Demolition Industrial Cleaning Tank Cleaning Wiping up Tank Sludge Cleaning Tank for Integrity Testing Tank Cleaning 1/4 Vacuum Truck Pumping, Water Transportation and Disposal Vacuuming Free Product under Ice Waste Recovery, Pumping into 300 gallon Caged Poly Tote Vacuum Truck Pumping, Water Transportation and Disposal 1/4 Spraying Down Demolition Materials Demolishing Brick Walls Building Down and the Site Restored Spraying Down Demolition Materials 1/3 Released PCB containing Transformer Fluid Removal of Residual PCB containing Fluid Steam Cleaning and Pressure Washing Released PCB containing Transformer Fluid 1/4

Wetland Consulting 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 considerable number of wetlands and cannot be filled without a permit. The wetland services ET offers are: Wetland Assessment Wetland Delineation Wetland Permitting Wetland Sequencing (Avoidance, Minimization and Replacement) Wetland Mitigation Plan Development Violation Compliance Wetland Construction Wetland Delineation Wetland Mitigation ET can assist the property owner by acting as an impartial third party for delineating the location, size and type of the wetlands on your property. Once the wetlands are delineated, a site map and final report are compiled outlining the vegetation type, soil classification, and groundwater depth discovered at the site. The report is reviewed with the client and options are presented which may allow the client to complete the project as inexpensively as possible. ​ Classifying Soils Munsell Book Soil Identification Classifying Soils 1/2 If wetlands impacts are necessary to complete the project, ET can assist client’s wetland sequencing and mitigation. This wetland mitigation process provides a replacement plan that locates suitable property for wetland replacement or a wetland mitigation bank in your Service Area. We also work closely with the state and local agencies to create a comfortable working relationship to streamline the review and approval projects, so the projects get permitted in a timely manner. Replacement Wetland, Year 1 Replacement Wetland, Year 3 Replacement Wetland, Year 5 Replacement Wetland, Year 1 1/3