Massachusetts Reevaluates Previously Closed Sites

MDEP-headerIn Massachusetts, as well as across the US, vapor intrusion mitigation continues to garner its share of attention as land owners, developers, and environmental consultants look to develop environmentally impaired residential, retail, and commercial property. While typically faced with a host of challenges in these redevelopment efforts, including evolving risk standards associated with vapor intrusion mitigation, those involved often look to environmental consultants and Licensed Site Professionals (LSPs) to help them navigate the current guidelines and mandatories as instructed by the Massachusetts Department of Environmental Protection (MassDEP). Deciphering how technology has impacted the various ways to address vapor intrusion, as well as how to best stay current with MassDEP guidelines and how these might affect your site, is key for developers and landowners alike. Provided here is an overview on the recent update to the MassDEP standards concerning TCE exposure and vapor intrusion, and how Land Science Technologies®(LST), a division of REGENESIS®, offers turn-key solutions successfully addressing today’s issues in vapor intrusion mitigation.

MassDEP Reopens 200 Previously Closed Sites

In recent meetings conducted by the MassDEP’s Waste Site Cleanup Advisory Committee, it was announced that the MassDEP will soon begin contacting owners of those sites which had prior closure, and where available data supports the presence of trichloroethylene (TCE) at levels which may be of concern. It was in June of 2014 that the MassDEP announced updated rules and standards concerning the most recent USEPA toxicity values. At that time, MassDEP also updated its imminent hazard criteria for TCE exposure in indoor air, and revised the Massachusetts Contingency Plan (MCP) Method 1 soil and groundwater requirements and reportable concentrations to better reflect these new values.

Since the new maximum contaminant levels are now lower (it has been reported that they will now be 5 μg/L in soil and groundwater), MassDEP has re-evaluated nearly 1,000 sites that were closed under the previous rules, in order to determine whether they are at risk for exceeding the newer, more stringent guidelines. From this re-evaluation process, the department found 200 sites that they have marked as top priorities that are in excess of the newer MCLs, so responsible stake holders should expect to be contacted by MassDEP if they are on this short list. For those who are not one of the first 200 sites, it is uncertain at this time whether or not MassDEP will require further action. However, it is expected that these parties will eventually be contacted, and that pro-active property owners and will begin investigating remediation and/or vapor mitigation options to minimize their liability. The Massachusetts Contingency Plan which contains requirements and procedures for the cleanup of hazardous materials can be found here. The MassDEP TCE toxicity information fact sheet can be found here.

Advancements in Mitigation of Vapor Intrusion

Recent breakthroughs in vapor intrusion mitigation technologies provide cost-effective solutions that mitigate the risks associated with vapor intrusion. These turn-key solutions include Retro-Coat ™ Vapor Intrusion Coating, a chemically resistant and durable coating installed on top of existing concrete to protect existing structures from the threat of contaminant vapor intrusion, Geo-Seal® Vapor Intrusion Barrier, and Vapor Vent™, a gas vapor management technology installed sub-slab and designed to eliminate vapor intrusion in new structures built on Brownfields or any type of environmentally-impaired site.

Stop Migrating Plumes Before It Becomes a Liability: PlumeStop Liquid Activated Carbon

In addition, Massachusetts LSPs and their clients are benefitting from PlumeStop®, a unique, fast-acting soil and groundwater remediation reagent from REGENESIS that captures and biodegrades a wide range of contaminants. PlumeStop provides a turn-key remedy to bring sites into compliance, especially in areas where groundwater is in close proximity to buildings. PlumeStop utilizes four distinct treatment mechanisms: step one is dispersion within the subsurface, step two involves rapid sorption of dissolved-phase contaminants, step three is biodegradation of contaminants within the matrix, and step four involves regeneration of sorption sites for long-term treatment. In short, if a site is reopened and levels exceed standards – PlumeStop is a solution to rapidly mitigate the problem.

Land Science Technologies (LST): Vapor Intrusion Solutions

Land Science Technologies provides innovative, cost-effective solutions for environmentally impaired properties, also known as brownfields. As experts in the field of vapor intrusion mitigation, LST offers leading engineering firms, environmental consultants, building owners, and real estate developers turn-key solutions that address today’s issues in the development of brownfields. As a division of REGENESIS, Inc., a global leader in groundwater and soil remediation services, LST was established to address the growing need for vapor intrusion solutions in a marketplace faced with increasing occurrence and regulation of vapor intrusion, as well as its impacts on human health.

REGENESIS Remediation Products and Services

REGENESIS provides a range of science-based, specialized remediation products and services which include treatment technology selection, application design, on-site services, data interpretation and performance reviews. Environmental consultants, engineers and remediation professionals trust REGENESIS to produce results, knowing our expertise and industry knowledge has been proven time and again at the job site.

Brownfield Project Using LST Technologies Wins National Award for Vapor Intrusion Mitigation Success

cardinal-medical-phoenix-awardLand Science Technologies (LST), a wholly-owned division of REGENESIS®, is proud to announce that a revitalization project using the vapor intrusion solutions, Geo-seal® and Vapor-Vent was recently recognized with the Phoenix Award at the National Brownfields Training Conference. The conference, which is a premier industry trade show and training event hosted by the Environmental Protection Agency (EPA) and International City/County Management Association (ICMA), focuses on environmental rejuvenation to stimulate economic activity in enervated areas.

Each year, 20 of the most impressive brownfield revitalization projects from across the nation’s 10 EPA districts are handpicked for the Phoenix Awards, the most widely respected designation of excellence in brownfield redevelopment. The winning projects are chosen by a panel of environmental professionals, government and business leaders based on criteria including: “Magnitude of the project, innovative techniques, solutions to regulatory/social issues and impact upon the community.”

The winner for EPA Region 5 was the Cardinal Health Distribution Center in Detroit, Michigan. For this project, the environmental consulting firm AKT Peerless designed a vapor mitigation system, which included the application of both Geo-Seal® and Vapor-Vent™ to the entire footprint of a medical supply warehouse (275,000-squarefeet) to mitigate the vapor intrusion risk. The successful outcome at this site is resulting in the revitalization of the 17.5-acre area, and the creation of a facility that is expected to bring 140 jobs to the region.

Inundated with volatile organic compounds (VOCs), including chlorinated solvents, the 80-property assemblage was blighted and severely contaminated from the polluted remains of dilapidated factories, fuel storage operations, a rail yard, paint shops and commercial structures. Utilizing its proprietary, state-of-the-art Geo-Seal and Vapor-Vent offerings across the site’s expansive footprint, the project team was able to construct a highly effective, resistant barrier—sealing the area between the subgrade and building foundation from chemical vapor intrusion.

“Land Science’s performance on the redevelopment of what is now the Cardinal Health Medical Distribution Center underscores the advancements made in the field of vapor intrusion mitigation,” said REGENESIS CEO and president, Scott Wilson. “We are proud and honored to have contributed to this project.”

For more information about vapor intrusion solutions from Land Science Technologies, contact us online or call 949-481-8118 to get in touch with your regional representative.

Facing Vapor Intrusion Challenges at Your Site?


Through its own research and science-based product and solution development, Land Science® provides a critical link to help bridge the gap between environmental consulting and the construction industry, and how these relate to successful vapor intrusion mitigation.


In a relatively short time, Land Science, a wholly-owned division of REGENESIS, has quickly established itself as a global leader in vapor intrusion mitigation. With day-to-day operations managed by Thomas Szocinski, Land Science addresses the growing need for vapor intrusion solutions in a marketplace faced with increasing occurrence and regulation of vapor intrusion, as well as its impacts on human health.


While initially known for developing highly effective, technology-based products for the mitigation of vapor intrusion, Land Science has also gained a reputation for being client and solution-focused. Drawing from its close association with REGENESIS, Land Science provides integrated turn-key solutions to a growing number of clients. Redevelopment project sites across the US have benefited from the application of Geo-Seal® Vapor Intrusion Barrier, a gas vapor management technology designed to eliminate vapor intrusion on Brownfields, Retro-Coat™ Vapor Intrusion Coating, a chemically-resistant material coating that protects existing structures from contaminant vapor intrusion without the need for additional concrete protection, and the Vapor-Vent™ Vapor Collection System, a low profile vent system that can be used in lieu of slotted PVC pipe. These results-based solutions are applied to a wide range of sites that include residential, manufacturing, Quick Service Restaurant, and Food/Grocery locations.


Although Land Science has forged an enviable reputation within the industry due to its outstanding range of products and solutions, it’s their deep reservoir of experience in vapor intrusion mitigation that helps to separate the company from its competitors. This experience includes years of managing brownfield and landfill redevelopment projects where vapor intrusion barriers and venting systems are implemented throughout the United States and Canada. In addition, Land Science staff possess a wide and varying range of professional certifications specific to vapor intrusion training, leadership and professional development. With expertise that includes extensive on-site field experience, R&D, regulatory compliance, and technical sales, Land Science has established itself as a leader in the vapor intrusion mitigation technology industry as a provider of high quality and scientifically proven solutions.

Geo-Seal® Vapor Intrusion Barrier Awarded U.S. Patent

Contributed by Bryan Vigue, Vice-President of Marketing, REGENESIS

Land Science Technologies a division of Regenesis, Inc., is proud to announce that the Geo-Seal® Vapor Intrusion Barrier was recently granted a United States patent in July 2011. Geo-Seal is designed to prevent contaminant vapors such as VOCs and methane, which come from subsurface sources, from migrating into planned or existing buildings. More specifically, the technology is a composite vapor intrusion barrier comprised of a 60 mil spray-applied asphalt barrier encapsulated between two HDPE layers. This patented approach to vapor mitigation creates the ideal blend between chemical resistance and constructability to provide long-term protection against VOCs and methane gas.  Additionally, the Geo-Seal system can be customized to meet project specific needs such as:

1. Buildings constructed in below grade or in the water table
2. The retrofitting of existing structures
3. High-risk sites with extreme levels of contamination

Used on a wide variety of sites across the United States, Canada and Europe, Geo-Seal applications range from fast food restaurants built on former gas stations to residential developments built over legacy VOC plumes.  Geo-Seal is often combined with Vapor-Vent for maximum, long-term vapor intrusion protection.  Vapor-Vent is a low-profile, trenchless venting technology that is installed in a permeable medium of either gravel or sand and can be designed to actively or passively alleviate the buildup of vapors beneath the structure.

Where warranted, Geo-Seal is an integral part of the site remediation process and can easily be installed in combination with any of the in situ remediation technologies offered by Regenesis.

REGENESIS provides advanced technologies for groundwater resources, including specialty soil and groundwater remediation products. If you’re unsure of the condition of your site, you can request a free site evaluation from REGENESIS. For more information, follow us on Twitter, “Like” us on Facebook and subscribe to our YouTube channel. Also, keep up with our blog for all the latest updates.