Nitra-Seal Protects Indoor Air Quality for Customers and Tenants at a New Retail Center
This project snapshot features the following:
- Nitra-Seal Protects Indoor Air Quality at Retail Center
- Petroleum Hydrocarbons Abated
- 10,000 Square Feet Installed
The project is a commercial retail center in St. Louis, and part of a larger, decade-long redevelopment project. A nearby, historical fuel spill resulted in petroleum hydrocarbon compounds, including benzene, ethylbenzene, and naphthalene, being detected at concentrations exceeding Missouri’s Risk-Based Corrective Action indoor air screening levels. Consequently, the soil gas was considered a vapor intrusion risk to future building occupants and required a vapor mitigation solution. The engineering consultant selected Nitra-Seal® with a TerraVent™ low-profile, passive venting system to address the risk. Selection factors included its ease of installation and superior chemical resistance offered by Nitra-Seal’s spray-applied, nitrile-advanced asphalt latex. Land Science teamed with the engineering consultant in the design process by developing the venting layout and vapor barrier system’s specifications. Additionally, the environmental consultant, a Land Science Certified Inspector, provided oversight on the installation and documented compliance with the project specifications per the development team’s request.