Historic Building Achieves Site Closure Using Retro‐Coat to Meet Environmental Screening Levels

Retro Coat San FranciscoProject Highlights

  • Site achieves closure due to the successful Retro‐Coat application
  • Post‐application indoor air data confirmed Retro‐Coat compliance with residential and commercial ESLs
  • Customized finish met building owner requirements
  • The application of Retro‐Coat achieved orders of magnitude reduction similar to those of Sub‐Slab Depressurization (SSD) Systems without the need to operate and maintain finicky mechanical systems

Project Summary

Retro‐Coat was selected to mitigate vapor intrusion within a structure built in 1907 that had been impacted by both a former underground storage tank and a local dry cleaner. Indoor air samples taken prior to application showed chlorinated solvent‐based PCE and TCE levels above the Regional Water Quality Control Board Environmental Screening Levels (RWQCB ESL).

Existing wood flooring, CMU block walls, framing obstructions on the wall, and conduits penetrating both the basement floor and walls presented challenges to successfully providing vapor intrusion mitigation to the entire basement area. The age of the structure was also a factor because little was known about how the building was constructed or what expansions or improvements

lst-san-francisco-2had been made over the years. The building owner sought to provide the future occupants of the building with vapor intrusion protection using a durable and slip resistant coating. Retro‐Coat was applied to the existing wall surface (CMU block walls) and across the floor. Additionally, a silica sand was broadcast across the floor during the Retro‐Coat application to achieve a non‐slip surface.

Upon completion of the Retro‐Coat application, indoor air samples were collected. Because the building use was mixed use, indoor air concentrations needed to meet both residential and commercial screening levels. The application of Retro‐Coat achieved orders of magnitude reduction similar to those of Sub‐Slab Depressurization (SSD) Systems without the need to operate and maintain unreliable mechanical systems.

Technology Description

Retro‐Coat Vapor Intrusion Coating System is a complete product line that consists of chemically resistant materials to protect existing structures from the threat of contaminant vapor intrusion without the need for additional concrete protection. The Retro‐Coat system has been subjected to rigorous testing procedures to prove its ability to combat the most aggressive chemical vapors. The system is rated for industrial use providing a durable finished surface suitable for vehicular traffic. Retro‐Coat coating technology was specifically developed for vapor intrusion.

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retro-coat

Combined Technologies Treat High Vapor and TCE Levels at Former Michigan Manufacturing Facility

lst-michigan-facilityProject highlights

  • Redeveloped facility delivers jobs to Michigan community
  • Simultaneous use of Retro-Coat™ and Vapor-Vent™ reduced number of SSD points
  • Approximately 30,000 square feet of Retro-Coat successfully applied
  • Retro‐Coat provided a durable finish for vehicle traffic and heavy equipment in a manufacturing setting

Project summary

St. Johns-based F.C. Mason company was provided a $1 million Clean Michigan Initiative Brownfields grant from the Michigan Department of Environmental Quality (MDEQ) to move its operations to the former Federal Mogul manufacturing facility which was vacated in 2008. F.C. Mason Company was founded in 1898 and specializes in manufacturing parts for agricultural, construction and industrial equipment. The acquisition of the 265,00-square-foot facility allows F.C. Mason Company to expand operations and bring back valuable jobs to Clinton County. Michigan-based Soil and Materials Engineers, Inc. (SME) was consulted to address the suspected environmental and vapor intrusion concerns resulting from years of manufacturing activities at the site.

lst-michigan-facility-2Trichloroethylene (TCE) contaminated areas were present in one section of the building. In 2009, in situ chemical treatment of the “hot spot” areas was conducted employing RegenOx® technology (REGENESIS®, San Clemente, CA). However, a vapor intrusion condition was later identified and mitigation was needed. Retro‐Coat was selected to be used in conjunction with an active sub‐slab depressurization (SSD) system. By simultaneously utilizing the two mitigation approaches, SME was able to reduce the number of SSD points in the design and the total area requiring the vapor intrusion barrier coating. MDEQ approved of the plan. A certified Retro‐Coat applicator installed 6 mils of red Retro-Coat Primer and 20 mils of grey Retro-Coat along with a broadcasted aggregate to provide a non-slip surface. The contrast in color between Primer and Retro-Coat allows the clear identification of wear over time, prompting repair if needed, and ensuring long‐term protection from vapor intrusion.

Technology Description

Retro‐Coat Vapor Intrusion Coating System is a complete product line that consists of chemically resistant materials to protect existing structures from the threat of contaminant vapor intrusion without the need for additional concrete protection. The Retro‐Coat system has been subjected to rigorous testing procedures to prove its ability to combat the most aggressive chemical vapors. The system is rated for industrial use providing a durable finished surface suitable for vehicular traffic. Retro‐Coat coating technology was specifically developed for vapor intrusion.

Vapor‐Vent is a low profile vent system that can be used in lieu of slotted PVC pipe. The speed of installation and the proximity of the vent to the barrier provide cost savings and performance benefits compared to other technologies.

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Upscale Grocer Selects Geo-Seal to Protect Key Property Against Presence of Methane and VOCs

Grocer Selects Geo-Seal

Land Science®, a leader in providing cost-effective, industry-leading vapor intrusion mitigation solutions, was chosen by a leading upscale grocer to provide a vapor mitigation system to protect against the presence of methane and volatile organic compounds (VOCs).

The grocer selected Geo-Seal for this project due to its proven performance for blocking VOCs on hundreds of sites with the lowest diffusion rates in the industry.

Ultra Premium Grocer Driven by Need for Safest Barrier Solution for Commercial Site

The installation of the Geo-Seal Vapor Intrusion Barrier under the grocery store was triggered by the adjacent property, which had a history of being used as a landfill. The grocer, which had developed a reputation for providing ultra-premium, high quality foods, had concerns when testing revealed the presence of methane, along with volatile organic compounds. The supermarket undertook a proactive interest in addressing the vapor intrusion since it was to be the anchor store for a large commercial site.

Advanced Technologies and Proven Success Made Geo-Seal the Right Choice

A significant factor in the selection of Land Science for the project stemmed from the Company’s past success in site treatment of high traffic locations, which include Quick Service Restaurants (QSR), gas stations, dry cleaners, and Brownfield sites. In addition, the supermarket chain recognized Land Science for their advanced technologies, cost-effectiveness, and reputation for providing successful, evidence-based outcomes within the restaurant and food services industries.

lst-grocer-2Proactive Approach Provides Safe Environment for Future Tenants

During the redevelopment process, the historic use of a site, or adjacent sites, oftentimes leads clients to take a proactive approach in mitigating various land reuse issues, such as vapor intrusion. Part of that approach can include the remediation of the site and the installation of a vapor intrusion barrier to prevent the potential for residual vapor contaminants from migrating into the new structure. Typically, the need for a vapor intrusion barrier stems from various regulatory requirements, demands by legal counsel, or requirements from lenders.

Throughout the Company’s history, our experience in the retail food service industry has shown that the installation of the Geo-Seal vapor intrusion barrier has met, or at times, surpassed the requirements of the site, and provided a “safe” environment for future retail supermarket tenants of the property.

Tested to be the Most Protective Gas Barrier in the Industry

Geo-Seal is the ideal blend of chemically resistant HDPE sheet and spray-applied membrane technologies designed to eliminate vapor intrusion on Brownfields or any type of environmentally-impaired site. Unlike simple sheet barriers, Geo-Seal utilizes a spray-applied core layer that completely seals penetrations while being sandwiched between two layers of protective high density polyethylene.

This vapor intrusion mitigation approach is unlike any other barrier technology on the market today and has been tested by third party laboratories to be the most protective gas barrier in the industry.

About Geo-Seal Description

Geo-Seal® is a gas vapor management technology designed to eliminate vapor intrusion on Brownfields or any type of environmentally-impaired site. Geo-Seal is a chemically-resistant material placed between the foundation of the building and the soil pad to eliminate vapor intrusion pathways and stop contaminant vapors from permeating through the slab.

By deploying Geo-Seal, developers can ensure a healthy indoor environment while reducing the cost of site remediation and expediting site construction.

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Ohio EPA Develops Vapor Intrusion Memorandum

Ohio EPA vapor intrusion guidelinesThe Ohio Environmental Protection Agency (EPA) Division of Environmental Response and Revitalization (DERR)  has developed a memorandum on action levels and response timeframes for sites that are being investigated for vapor intrusion of trichloroethylene (TCE) and other associated chemicals. DERR developed this guidance in consultation with USEPA and uses these risk levels and response times when conducting Ohio EPA lead investigations for the CERCLA and RCRA programs.

This guidance does not have the force of law, but Ohio EPA recommends its use to outside stake holders, including the Voluntary Action Program (VAP), in evaluating the concentrations of volatile compounds in groundwater, soil gas or indoor air in residences and commercial buildings.  Refer to this link for further information relating to the recent memorandum on the document titled “Recommendations Regarding Response Action Levels and Timeframes for Common Contaminants of Concern at Vapor Intrusion Sites in Ohio.”

Ohio EPA also has a Vapor Intrusion guidance document titled “Sample Collection and Evaluation of Vapor Intrusion To Indoor Air” developed in 2010 with a memorandum from May 2016. In addition, you can visit Land Science’s Resource Page for links to each state agency, vapor intrusion guidance, as well as national and federal guidance documents.

Have further questions? Contact Land Science, we have a team dedicated to vapor intrusion and mitigation solutions.

Major Airline Installs Geo-Seal to Successfully Expand Maintenance Facility

Geo-Seal vapor intrusion solution at airport
A vapor intrusion barrier was sought to protect the new structure from potential vapor intrusion and keep the project on schedule.

Project Highlights

  • Triple-layer protection and high puncture resistance addressed concerns over permeation into the building
  • Enhanced chemical resistance over spray-applied asphalt/latex material
  • Installation of Geo-Seal® allowed project to remain on schedule
  • Vapor-Vent trenchless system installed to collect and vent vapors from beneath the structure

Project SummaryDallas Love Airport Vapor Intrusion

The Dallas Love Field airport originally opened in 1917 and has over 90 years of aviation use. A major airline decided to expand their current facilities at Love Field which included the construction of a new maintenance facility. An underground storage tank was discovered prior to construction and insufficient historical site records caused concern for potential indoor air vapor in the new building. A vapor intrusion barrier was sought to protect the new structure from potential vapor intrusion and keep the project on schedule.

TITAN Engineering along with their client selected Geo-Seal Vapor Intrusion Barrier based on its enhanced chemical resistance and industry leading 20 year system warranty. The Geo-Seal triple layer protection allows for resistance of contaminant permeation breakthrough for a period 18X longer than that of simple asphalt/latex membranes.

Under a system warranty, Land Science warrants the integrity of the material and the workmanship of the certified Geo-Seal installer against chemical migration into the building.

Technology Description

Geo-Seal is a gas vapor management technology designed to eliminate vapor intrusion on Brownfields or any type of environmentally-impaired site. Geo-Seal is a chemically-resistant material placed between the foundation of the building and the soil pad to eliminate vapor intrusion pathways and stop contaminant vapors from permeating through the slab.

By deploying Geo-Seal, developers can ensure a healthy indoor environment while reducing the cost of site remediation and expediting site construction.

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Large Manufacturing Facility Addresses Migrating cVOC Plume with Geo-Seal

Manufactuing Facility Vapor Barrier
A 104,000 square foot manufacturing facility required the use of a vapor barrier due to migrating chlorinated solvents in groundwater.

Project Highlights

  • Geo-Seal®‘s triple‐layer protection consisted of spray‐applied membrane encapsulated with HDPE providing chemical resistance and ease of application
  • 100,000 square feet of barrier successfully installed in 10 days, saving the owner three weeks of costly labor compared to the originally specified PVC sheet
  • Smoke testing procedure ensured integrity of barrier and installation

Project Summary

Vapor Barrier Manufacturing FacitilyA 104,000 square foot manufacturing facility required the use of a vapor barrier due to migrating chlorinated solvents in groundwater from a nearby plume. In addition to the vapor barrier, a 30 mil battened and welded PVC sheet was also specified for enhanced protection which required an extended installation time. Five weeks were estimated to install the PVC sheet due to a complex 20,000 square foot office area adjacent to the manufacturing facility.

To save time while delivering a safe and effective solution, Geo‐Seal Vapor Intrusion Barrier was installed and eliminated the need for the PVC sheet installation. Geo‐Seal contains a triple layer protection that includes a 60 mil spray-applied asphalt/latex layer encapsulated with two layers of high density polyethylene, providing a system that is chemically resistant yet easy to install.

Our certified applicators implemented a smoke test for quality control to identify any voids not seen by the naked eye to ensure the integrity of the membrane. The Geo-Seal system was successfully installed in ten days, saving the owner three weeks of costly labor.

Technology Description

Geo-Seal is a gas vapor management technology designed to eliminate vapor intrusion on Brownfields or any type of environmentally-impaired site. Geo-Seal is a chemically-resistant material placed between the foundation of the building and the soil pad to eliminate vapor intrusion pathways and stop contaminant vapors from permeating through the slab.

By deploying Geo-Seal, developers can ensure a healthy indoor environment while reducing the cost of site remediation and expediting site construction.

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Kentucky Division of Waste Management Approves Geo-Seal for Mitigating Vapor Intrusion to Redevelop Brownfield Property

Kentucky Brownfield
Chlorinated solvents were discovered in the subsurface soil and groundwater beneath the proposed construction area and caused concern over potential indoor air vapor within the housing complex.

Project Highlights

  • Approved by Kentucky Division of Waste Management
  • Approximately 142,000 square feet installed at brownfield site allowing for redevelopment to move forward
  • Triple layer protection from chlorinated solvent vapors provides safe and reliable barrier for student housing

Project Summary

lst-kentucky-2Student housing was to be constructed in Louisville, KY over 42 acres of vacant Brownfield property. Chlorinated solvents were discovered in the subsurface soil and groundwater beneath the proposed construction area and caused concern over potential indoor air vapor within the housing complex. Terracon Consultants, Inc. specified Geo-Seal® Vapor Intrusion Barrier and Vapor-Vent Trenchless Venting System in their risk management plan.

The Kentucky Division of Waste Management under the Kentucky Department of Environmental Protection evaluated the Geo-Seal vapor barrier along with other membranes and determined Geo-Seal to be an “excellent vapor intrusion barrier system” based on its ability to resist contaminant permeation and breakthrough. 142,000 square feet of Geo-Seal successfully installed.

Technology Description

Geo-Seal is a gas vapor management technology designed to eliminate vapor intrusion on Brownfields or any type of environmentally-impaired site. Geo-Seal is a chemically-resistant material placed between the foundation of the building and the soil pad to eliminate vapor intrusion pathways and stop contaminant vapors from permeating through the slab. By deploying Geo-Seal, developers can ensure a healthy indoor environment while reducing the cost of site remediation and expediting site construction.

Vapor‐Vent is a low profile vent system that can be used in lieu of slotted PVC pipe. The speed of installation and the proximity of the vent to the barrier provide cost savings and performance benefits compared to other technologies.

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Historic Site Transformed into Multi-Million Dollar Community Complex Following Installation of Geo-Seal

Dayton, Ohio Kroc Center
Geo-Seal’s proprietary formula, installation procedures and specialized
equipment allowed the product to be installed in cold climate without
the use of artificial heat.

Project Highlights

  • Approximately 100,000 square feet installed over four buildings in new Dayton, OH community complex
  • Geo-Seal® CORE material successfully applied in 25 degree temperatures without artificial heating
  • As part of the total square footage, applied 16,000 square feet to retrofit the basement of a +100 year old historic mansion
  • Triple-layer protection provides maximum vapor intrusion protection to site

Project Summary

The Salvation Army Kroc Center is a multi-million dollar community complex on 17.5 acres. Dayton, OH was one of 29 cities to receive funding from the 1.1 billion dollar donation of the Ray Kroc Family for the development of community centers across the United States.

Environmental concerns arose from a neighboring groundwater plume migrating from a former industrial facility. Geo-Seal Vapor Intrusion Barrier and Vapor-Vent trenchless vent system were applied to protect the building from the threat of chlorinated solvent vapor intrusion and alleviate vapor buildup beneath the facility. The application was completed in November during 25 degree temperatures.

Geo-Seal’s proprietary formula, installation procedures and specialized equipment allowed the product to be installed in a cold climate without the use of artificial heat, saving the client considerable time and money.

Dayton Salvation ArmyTechnology Description

Geo-Seal is the ideal blend of chemically resistant high density poly-ethylene (HDPE) sheeting and spray applied membrane technologies, resulting in the most appropriate vapor intrusion barrier technology available to eliminate vapor intrusion into structures built on environmentally impaired sites.

Geo-Seal is a composite system installed between the subgrade and building foundation to seal off exposure pathways and prevent toxic vapors from migrating into structures. By selecting Geo-Seal, developers can ensure a healthy indoor air
environment while reducing the cost of site remediation and expediting site construction.

 

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Geo‐Seal Selected Over Alternative Gas Membrane Systems to Effectively Mitigate Vapor Risk at Urban Chicago Recreation Facility

Chicago Fieldhouse Geo-Seal
Geo‐Seal, a triple‐layer, composite vapor intrusion barrier was installed to protect the users of the fieldhouse from potential exposure to chlorinated solvent vapors.

Project Highlights

  • Geo‐Seal® selected over other vapor barrier options due to its superior chemical resistance, ease of constructibility and cost‐effectiveness
  • Approximately 16,000 square feet of Geo‐Seal successfully installed
  • Vapor‐Vent HD trenchless passive ventilation system utilized to alleviate buildup of vapors beneath the structure
  • Site achieves LEED “Silver” Certification for green construction technology on historic site

Project Summary

A new fieldhouse utilizing the latest in green technology was constructed by the Public Building Commission (PBC) in the city of Chicago, IL. The development incorporated various sustainable design elements and materials to achieve the Commission’s goal of LEED “Silver” Certification. Past use of an adjacent property resulted in chlorinated solvent contamination which presented a vapor intrusion risk on‐site.

Fieldhouse ChicagoGeo‐Seal, a triple‐layer, composite vapor intrusion barrier was installed to protect the users of the fieldhouse from potential exposure to chlorinated solvent vapors. The Geo‐Seal technology was chosen by PBC’s consultants, Parson Corporation and Carnow Cornibear & Associates, based on an evaluation of various gas membrane technologies, including a simple spray‐applied asphalt latex membrane and HDPE sheeting. The Geo‐Seal system was designed and inspected by Terracon Consultants.

Technology Description

Geo-Seal® is a gas vapor management technology designed to eliminate vapor intrusion on Brownfields or any type of environmentally-impaired site. Geo-Seal is a chemically-resistant material placed between the foundation of the building and the soil pad to eliminate vapor intrusion pathways and stop contaminant vapors from permeating through the slab. By deploying Geo-Seal, developers can ensure a healthy indoor environment while reducing the cost of site remediation and expediting site construction.

Vapor‐Vent is a low profile vent system that can be used in lieu of slotted PVC pipe. The speed of installation and the proximity of the vent to the barrier provide cost savings and performance benefits compared to other technologies. Vapor‐Vent can be installed to passively or actively vent vapors from under the building. The movement toward energy efficient buildings and the cost to maintain active venting systems make passive systems an attractive alternative. In addition, a passive system can be converted to active if needed.

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Geo‐Seal Becomes First Vapor Intrusion Mitigation Barrier Approved Under Florida Cleanup Program

Florida Department of Environmental Protection Approves GeoSeal Under the Drycleaning Solvent Cleanup Program

Florida Drycleaning
In order to prevent chlorinated contaminant vapor intrusion,
Golder Associates designed a mitigation system using the Geo‐Seal
Vapor Intrusion barrier.

Project Highlights

  • First vapor intrusion mitigation barrier approved by the Florida Department of Environmental Protection (FDEP) under the Drycleaning Solvent Cleanup Program (DSCP)
  • Former drycleaner site successfully redeveloped and protected from harmful PCE and TCE contaminants
  • National pharmacy retail chain selects Geo-Seal® as part of construction plans

Project Summary

To accommodate a planned expansion, CVS Pharmacy acquired an adjoining vacant building (approximately 3000 square feet) which formerly operated as a commercial dry cleaning facility. Site investigations revealed chlorinated solvent contamination in groundwater beneath the building, including tetrachloroethene (PCE) and trichloroethene (TCE).

Drycleaning Florida The site was entered into the FDEP’s Drycleaning Solvent Cleanup Program. In order to prevent chlorinated contaminant vapor intrusion, Golder Associates designed a mitigation system using the Geo‐Seal Vapor Intrusion barrier. A soil vapor extraction system and monitoring wells were also installed to effectively treat the subsurface contamination.

This was the first vapor intrusion mitigation installation approved by the FDEP under the Florida DSCP. The Florida Legislature created the DSCP in 1994 to provide a source of funding for rehabilitating sites and drinking water supplies contaminated by drycleaning solvents. This was the first such program in the nation.

Technology Description

Geo-Seal is a gas vapor management technology designed to eliminate vapor intrusion on Brownfields or any type of environmentally-impaired site.

Geo‐Seal is a chemically‐resistant material placed between the foundation of the building and the soil pad to eliminate vapor intrusion pathways and stop contaminant vapors from permeating through the slab. By installing Geo‐Seal, developers can ensure a healthy indoor environment while reducing the cost of site remediation and expediting site construction.

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