Remediation FAQs


What is GRS?

Global Remediation Solutions, LLC (GRS) is a soil and groundwater remediation company that specializes in In Situ Thermal Remediation (ISTR) using Electrical Resistance Heating (ERH). GRS’ vision is to provide our customers with customized remediation solutions for their most difficult sites.

What is the best way to contact GRS?

Simply phone or e-mail and we will be happy to discuss the application of in situ heating on a specific or various contaminant types. We also have an easy to use Site Evaluation and Quote Request Form. Let us know how we can help you.

Michael Dodson
Global Remediation Solutions, LLC
Electrical Resistance Heating
1081 Columbia Blvd.
Longview, WA 98632
Phone: (360) 423-2245 / Cell: (360) 560-4847

Can GRS provide services throughout the United States?

As a member of the PNE corporate family, GRS has the capacity to perform ISTR projects throughout North America and Canada. GRS will also consider off-shore projects on a case by case basis. PNE is a licensed contractor in 32 states and routinely delivers multiple projects across the United States at the same time.

Can GRS provide project bonding?

As a business line of the largest company providing ISTR services, GRS has a contract and performance bonding capacity of $80MM. Backed by Zurich North America, these surety levels are significantly higher than the ISTR industry average. GRS also carries over $10MM in professional and pollution liability insurance.

What contaminant types can GRS treat?

In situ heating is unique in its ability to effectively treat dense non-aqueous phase liquids (DNAPL). This makes it an ideal technology for remediating chlorinated solvents such as PCE, TCE, DCE, and VC or other volatile and semi-volatile halogenated hydrocarbons including TCA, EDB, and TeCA.

ISTR is a proven remediation solution for light non-aqueous phase liquids (LNAPL). Rapid and complete cleanup of gasoline, diesel, BTEX, and methyl tertiary butyl ether (MTBE) have been achieved in both soil and groundwater.

Subsurface heating is also a leading remediation technology for pesticides, herbicides and the polycyclic aromatic hydrocarbons (PAHs) present in creosote at wood treatment sites and in the coal tars at former manufactured gas plant (MGP) sites.

What type of environmental heating does GRS provide?

GRS provides in situ Electrical Resistance Heating (ERH). This technology has been successfully applied at over 100 sites in North America and is being increasingly deployed in Europe. ERH is a robust form of ISTR that can quickly and effectively clean both vadose and saturated zones regardless of soil type. ERH provides uniform subsurface heating, can be safely applied under occupied buildings, and efficiently treats to depths of over 100-feet below grade. It has been successfully applied in flowing gravel aquifers, tight clays, heterogeneous glacial tills, and weathered bedrock.

Does GRS only use ISTR or can it deploy other remediation technologies?

As a full-service environmental remediation and construction company, GRS also provides the following conventional remediation technologies and services:

Soil Vapor Extraction (SVE) Product Recovery Vapor Abatement
Recirculation Wells Groundwater Treatment Waste Management
Multi-Phase Extraction (MPE) Excavation and Dewatering System Optimization
Air Sparging UST Removal Enhanced Bioremediation

By combining remediation technologies and adding in situ heating where appropriate, GRS can treat almost any volatile or semi-volatile hydrocarbon found in either saturated or unsaturated soil conditions.

What types of staffing does GRS have available?

The GRS remediation team is built upon experienced environmental project managers, engineers, and field technicians. It also includes journeymen electricians, electrical power control and automation specialists, environmental construction managers, hazardous waste management and disposal experts, emergency response professionals, and trained field crews.

The ISTR Division is lead by Mr. Michael Dodson, who managed the business and engineering team that commercialized ERH in the late 1990s. In the last 14-years, Mr. Dodson has been involved with over 70 ERH projects across North America, including the East Gate Disposal Yard (EGDY) project on the Fort Lewis army base in Tacoma, Washington. The successful EGDY cleanup is the largest and most complex ERH project completed to date.

Engineering supervision is provided by a professional engineer with over 5-years of direct ERH system design, installation, and operation experience. He has held engineering, project management, and operations roles on over 15 ERH sites and his experience is well balanced between west coast, mid-west, and eastern seaboard projects. Support staff includes engineers, hydrogeologists, and environmental chemists experienced with planning and permitting, subsurface modeling, hydraulic control and vapor intrusion, as well as the unique data collection, interpretation, and presentation issues associated with subsurface heating.

ISTR system installations and operations are guided by a senior Systems Operator who has managed over 20 ERH projects across North America in the past 9-years. Project staff includes engineers, geologists, and field technicians experienced with subsurface drilling and well installation, NAPL and groundwater extraction, vapor and steam recovery, steam condensers, vacuum blowers, vapor abatement systems, and the proper techniques for sampling hot soil, groundwater, and vapors.

GRS’ programs for electrical design, systems control, and electrical safety is managed by our sister company, Advanced Electrical Technologies (AET). AET specializes in high voltage systems, industrial power-supply, and electrical control and automation. With in-house access to 35 full-time industrial electricians, process automation specialists, experienced electrical design-build teams, and a complete Underwriters Laboratory Approved UL508A panel shop, GRS has outstanding electrical design and fabrication resources.

Where does GRS get its ERH Equipment?

GRS utilizes second generation design and fabrication concepts for its ERH power delivery, steam recovery, and subsurface wetting systems. GRS designs are based upon the concept of incorporating complementary and supporting remediation technologies into the GRS in situ heating process at project conception and not just as follow-ons.
That means GRS field equipment comes with an UL approval sticker ready for use in any municipality in North America. GRS can also obtain certification for equipment designated for use in the European Union marketplace.

GRS manufactures it own steam condenser and vacuum blower packages. Like GRS power supply systems, these equipment packages are mounted on skids and trailers for easy and rapid deployment. When vapor abatement is required, GRS uses thermal oxidizers, granular activated carbon (GAC) systems, and vapor condensation technologies from nationally recognized vendors. These units are skid mounted for easy integration into GRS subsurface heating systems.

This approach to equipment fabrication and selection, allows GRS to match technology and capacity to specific site and project needs.

Will GRS evaluate a site for our team or client?

GRS is happy to evaluate any site for the possible application of ISTR or combinations of technologies that include subsurface heating. To assist this effort, we have created an electronic Site Evaluation and Quote Request Form. This easy to complete form provides GRS with the information needed to determine the viability of ISTR for your site and develop preliminary design assumptions and cost estimates. We will e-mail you this form upon request, and it is available on our web site. Once an evaluation form has been returned to GRS, it typically takes us 3 working days to provide preliminary site evaluation results.

Can GRS preform bench-scale tests and pilot studies?

Working with a leading bioremediation firm, GRS has developed in-house laboratory capabilities to perform not only standard batch volatilization studies, but also large-scale dynamic column studies where the real-time interactions of contaminant volatilization, steam stripping, and bubble floatation can be evaluated using site soil, groundwater, and NAPL. GRS test apparatus and methods can also be used to study heat-enhanced bioremediation, chemical oxidization, and catalyzed in situ reactions under a wide range of simulated field conditions and technology application scenarios.

A logical next step after a successful bench-scale test is a field pilot study. By manufacturing our own power supply and control systems, GRS can provide equipment designed and sized specifically for pilot studies. Quite often, this makes it possible to complete a pilot study without the effort and expense of a large temporary electrical service drop for oversized full-scale remediation equipment.

What is on the GRS web site?

The GRS web pages are found on the PNE web site ( along with the web pages for all seven members of the PNE Corporate Family.

The GRS web pages focus on ISTR and contain interactive versions of our Site Evaluation and Quote Request Form that can be filled-out and submitted on-line. We keep the web site updated with information about GRS, the environmental remediation industry in general, and specific content concerning the use of heat-enhanced technologies for site remediation. We hope you visit our site and bookmark it for future reference.

Is GRS classified as a small business?

GRS provides remediation services as a small business under NAICS Code 56910. The small business standard under this code is 500 employees.