vapor intrusion webinar

The Vapor Intrusion Risk Pathway: Regulatory Updates & Hot Topics

Speakers: Blayne Hartman, PhD President, Hartman Environmental Geoscience and Hieu Nguyen Senior Research Engineer, Land Science

Land Science® is pleased to present a webinar with Dr. Blayne Hartman of Hartman Environmental Geoscience, a nationally recognized vapor intrusion expert, having assisted various governmental agencies with numerous regulatory vapor intrusion guidances and memorandums over the past decade as vapor intrusion has continued to be at the forefront of evolving regulations. During this webinar presentation, Dr. Hartman discusses the latest in regulatory changes across the nation along with practical assessment strategies for navigating the vapor intrusion pathway.

Joining Dr. Hartman is Hieu Nguyen, Senior Research Engineer at Land Science. With Hieu’s years of experience within the vapor mitigation and vapor barrier world, he has extensive knowledge and understanding of key aspects relating to appropriate site specific mitigation systems, as well as testing and evaluations of these systems. Hieu discusses unique methods to retro-fit and mitigate vapor intrusion for existing structures, along with the evaluation of vapor barrier physical properties. He will also cover Land Science’s barrier testing and provide detail on understanding diffusion coefficient testing for vapor barrier systems.

Webinar Recording Now Available

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Combined Remedy Includes Innovative Geo Seal® Barrier To Retrofit Site in Downtown Atlanta

Video Transcription

Narrator: Downtown Atlanta is attracting young professionals who want to live and work in a vibrant city environment. More and more, developers are looking for creative ways to redevelop once blighted areas and transform them into entertainment centers featuring food halls, farmer’s markets, unique attractions, and community events. Paces Properties, LLC, a leading developer of brownfield and urban sites across the Southeast has been responsible for many popular Atlanta urban redevelopment projects, like the recent Krog St. Market development. Looking for similar areas to develop, Paces purchased the former Larkin Coil Industrial Operations, a large sized property with over 52,000 square feet of former industrial space. One of the keys to the project entailed retaining parts of the original industrial structures, a feature that gives the mixed-use spaces unique character and is a key selling point to tenants and urban professionals who value the character and charm of the historic buildings throughout downtown Atlanta

Patrick Wilson: This was a unique site because there are several old buildings that we restored on the property combined with new buildings. There’s a lot of grade change on the property that also presented challenges to the construction team and the design team.

Narrator: Paces envisioned a 63,000 square foot development that would serve the day-to-day needs of Grant Park, Cabbagetown, Reynoldstown, and East Atlanta neighborhoods. As part of the redevelopment, Paces engaged Nova Engineering and Environmental, LLC, a leading environmental consulting firm, with offices across the southeast. As part of developing the most cost-effective approach, Nova worked with Regenesis and Land Science to design a combined remedy approach using Regenesis’ HRC, BDI Plus, and Plume Stop. The team also recommended a Geo-Seal vapor barrier for all 5 structures.

Jordan Kleine: There were significant chlorinated solvent impacts in the groundwater. And this was a former manufacturing site that wanted to be converted into a commercial use space, so they were looking for appropriate mitigation solutions to make this project come to life.

Keith Rice: When working with Land Science, we’re very intrigued by the options that we were given to mitigate the vapors that we found on-site. They’ve produced several different approaches, both conventional uses of their products, and then also retrofitted uses of their existing products.

Jordan Kleine: Generally, Geo-Seal is installed for new construction projects when you have a clean slate. But in this case, we were dealing with an existing building and multiple existing buildings where we’re actually retrofitting with Geo-Seal. So, we have been involved in helping Nova come up with a configuration that is appropriate for this scenario. And they have installed a sub-slab deep pressurization system within this existing concrete slab on site. Geo-Seal is then being installed on top of that existing concrete slab. And a 2-inch to 3-inch cap slab is gonna be poured on top of the Geo-Seal Barrier.

Chad Northington: So, what I like best about working at Regenesis is projects just like this, where we get to use our combined services and experience to provide a true turnkey solution, whether that’s from the design phase through the application, tapping into our Land Science capabilities for vapor intrusion, using our application division with Regenesis Services to actually apply our reagents that our R&D group came up with. It really covers the whole gamut.

Narrator: The combined approach developed ensures quick and cost-effective treatment of the TCE levels and allows for redevelopment of the site to move forward.

Patrick Wilson: I’m happy with Regenesis and Nova Engineering. We’ve been pleased with the way the application has been installed, and all the team members have worked well with the general contractor to date. And I certainly would use them again in the future.

Client Spotlight: Yen-Vy Van, Senior Hydrogeologist at Maul Foster & Alongi

Yen-vy MFAWhen you ask Yen-Vy Van, Senior Hydrogeologist at Maul Foster & Alongi, Inc. (MFA), about her day-to-day responsibilities, it’s hard to believe that one person could do so much. That’s because her role at Maul Foster & Alongi, Inc., a leading environmental engineering and planning firm in the Pacific Northwest and valued REGENESIS® client, stretches beyond just investigating and remediating impacted sites. From preparing technical documents and reports, to project and client management, to proposal development and other key duties, Van’s involvement seems to touch on nearly every aspect of what MFA does for their clients. Shares Van, “I also manage aspects of client marketing, mentor junior staff members, and conduct field work.” With so many responsibilities, choosing what she enjoys most can be difficult, but a few come readily to mind. Continues Van, “I especially enjoy the technical aspects of my work, such as applying forensic analysis and groundwater modeling of contaminants during remedial investigations to complete a more thorough investigation and understanding of the transport and fate of contaminants impacting the subsurface. I also enjoy the collaborative work we do at MFA – working with and learning from other professionals such as planners, civil engineers, and remediation engineers amongst other specialized professionals.”

Choosing Environmental Remediation

Choosing a career in environmental remediation came somewhat naturally to Van, since her interest in groundwater resources began early on with her university studies. “Environmental engineering was a natural segue for me. As a geologist/hydrogeologist, my interests revolved around groundwater resources. The area of environmental remediation of the subsurface is complex and fascinating, and provides the opportunity to rigorously evaluate and investigate the subsurface regime including soils, groundwater, free product, and vapor. Plus, I love scientific investigations, research, technologies, and engineering.”

Van’s university studies include a B.S. from California State University of Long Beach, and a M.S. from California State University of Los Angeles. To stay abreast of the rapid changes in her industry, she enjoys the opportunities to continue technical education in the environmental investigation and remediation fields. These include governmental organizations ranging from the EPA’s CLU-IN and USGS, to professional organizations and remediation experts that include REGENESIS, and others which offer webinars and courses/trainings throughout the year. She goes on to say, “I try to fit them in as often as possible. I believe in staying engaged to continually improve my technical understanding and capabilities.” Living just south of Tacoma, WA, Van works out of MFA’s Seattle office, and travels on an as-needed basis. She also works with the company’s Bellingham, Vancouver, and Portland offices on occasion.

Working with REGENESIS to Ensure Client Success

When asked what she enjoys most about working with REGENESIS, Van points to the high level of technical knowledge she sees from the REGENESIS staff. Says Van, “The REGENESIS technical team is terrific for many reasons. This includes their expertise, versatility, and proven successes. REGENESIS’ technical sales managers understand not only the technical aspects of environmental remediation, but that the various applications have consequential effects on businesses. I also like that REGENESIS factors in the property usage during their remediation design.” In addition, Van appreciates their multifaceted approach. She continues, “The versatility and remedial solutions REGENESIS offers makes them a recognized expert. Also, their tiered approach to targeting the biological and chemical reactions of contaminants and requirements for microbes to aggressively breakdown contaminants has proven to be quite successful.” When it comes to specific REGENESIS products, Van points to a couple in particular. “We’ve had the most success with ORC Advanced® and 3-D Microemulsion®. We’ve been able to obtain the much coveted No Further Action determination from the Washington Department of Ecology for sites where we have applied these amendments. Clients appreciate the minimized disruptions to their properties’ usages. With respect to vapor intrusion issues, we’ve had successes with the installation of Land Science®’s Retro-Coat Vapor Intrusion Barrier System. The mitigation and improvements in indoor air quality that results after the installation of these sealants have enabled our clients to proceed with property transactions. Without these successful mitigation measures, our clients would not have been able to proceed with future transactions on these properties.”

Married for 23 years, Van and her husband have two daughters. “One is a junior at Washington State University and the other is a sophomore in high school. They keep us sane and comically insane at times!” In her free time, she enjoys playing racquetball and competing in regional and local tournaments, and she and the family enjoy backpacking and whitewater rafting. Gardening while listening to baseball games on the radio is another hobby. In her spare time she volunteers at the county’s local library and hopes to get involved in Habitat for Humanity and working with a children organization in the future.

Asked how she would encourage others to join the field of environmental sciences, she concludes by relating how much she enjoyed presenting to her daughter’s elementary and junior high schools. “I’ve presented an hour-long compressed introduction to geology, environmental science, environmental engineering and how these fields apply to our daily lives as well as the exciting projects we engage in” says Van. “The students are usually interested, engaged, and curious. I believe engaging students at these levels is a good start to have them consider the sciences, the environment, engineering, and technologies as potential fields to explore for personal and professional interests.”

REGENESIS is proud to have Yen-Vy Van, Senior Hydrogeologist at Maul Foster & Alongi, Inc., as a valued client, and appreciates her expertise in hydrogeology and environmental engineering, and its impact in providing successful remediation outcomes for REGENESIS and its clients.