Terra Mentis has managed indoor air sampling, conducted risk assessments and managed indoor air data at one of the country's first and largest vapor intrusion sites. Much of our current understanding of vapor intrusion comes from this site, including validation of the Johnson-Ettinger vapor intrusion model currently used by the EPA. This experience has made us one of the most knowledgeable firms of vapor intrusion risk assessment in the country.
Hazen Research, Golden, CO: Assisted a research company to determine the nature and extent of a parchloroethylene release and its potential impact to an adjoining residential neighborhood where vapor intrusion might occur.
Villa Italia Mall, Denver, CO: Prepared a vapor intrusion risk assessment for a large mall in Denver, CO.
Colorado Department of Transportation, Denver, CO: Responsible for risk assessment and toxicology activities for a fourteen year period for the Colorado Department of Transportation (CDOT). Residents in the area were exposed to volatile chemical compounds migrating into homes and apartments from a potential underground source.
Livingston Rail Yard, Livingston, MT: A state-led active railroad site that contained hazardous wastes, such as chlorinated solvents and diesel, in soil and groundwater. The particular problem with this site was that high levels of TCE and PCE in groundwater were migrating into outdoor and indoor air on- and off-site.
Manufacturing plants handle and use a wide range of chemicals. These chemicals can be released to the air soil or water.
3M, Minneapolis, MN: Each facility, across the country, released significant emissions of volatile organic chemicals, semi-volatile organic chemicals, and metals. The risk assessment process was used to evaluate chemical releases to air and rank the facilities.
Alliant TechSystems®, Littleton, CO: Project was a clean up at a former weapons manufacturing facility where there was a suspected indoor air contamination problem and orders by the CDPHE and USEPA to investigate the problem.