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Exposure Assessments Services
Fate and Transport of Chemicals: The release of toxic chemicals to the environment can occur from both routine and non-routine releases from a source. Once released the chemicals become `contaminates` or `polutants`, and can impact both human and ecological receptors. Contaminates are initially released to surface soils, sediments, groundwater, and household dust. During the transport, various physical, chemical, and biological processes act upon the contaminates to degrade them or change their character. The most important untimate fate, of course, is the human body, where they can impact health and quality of human life.
Research has shown that people may spend up to 90% of their time indoors.
Because of this, toxic household dust and vapor intrusion are emerging metrics for measuring exposure and risk to humans via contaminated indoor dust particles, airborne vapors, and subsurface vapors emanating from contaminated soil and groundwater.
3TM Consulting, LLC has developed specialized field techniques for collecting both household dust and soil samples. The samples are then tested by forensic laboratories and may be fingerprinted in order to identify the source of the contamination.
3TM Consulting, LLC has evaluated households contaminated with Benzene, PAHs, PCBs, Dioxins/Furans, pesticides, herbicides, toxic metals, and toxic mold.
In some instances, the medical causation associated with these contaminants cannot be rationalized by only looking at current levels.
Historical exposure to these chemicals is also important, and in many instances, the historical levels were much higher than current levels indicate. 3TM Consulting, LLC can assist you in this analysis by performing retro-calculations of contaminant concentrations in various environmental media using the principle of half-life contaminant decay.