Jump to main content or area navigation.

Contact Us

Air and Climate Change Research

Simulation Program i-SVOC 1.0

for Dynamic Modeling of Semi-volatile Organic Compounds Indoors

Semivolatile organic compounds (SVOCs) are a diverse group of organic chemicals with vapor pressures between 10-14 and 10-4 atm. Many SVOCs are ubiquitous in the indoor environment. Over a hundred SVOCs are among the chemicals detected in the Centers for Disease Control and Prevention biomonitoring program. Examples of common indoor SVOCs include polyaromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), polybrominated flame retardants, perfluoroalkyl acids (PFAAs), phthalates, and pesticides. The presence of SVOCs in the indoor environment and the potential effect of these chemicals on human exposure and health have been the topics of active research in recent years. Because SVOCs tend to bind to interior surfaces and particulate matter, indoor exposure to these chemicals can take place via multiple routes including inhalation of air and suspended particulate matter, dermal contact with contaminated surfaces and dust, and incidental ingestion of dust. Thus, understanding the presence and distribution of SVOCs in buildings is critical to exposure estimation.

Computer program i-SVOC Version 1.0 is a Microsoft Windows-based application for dynamic modeling of the emissions, transport, sorption, and distribution of semi-volatile organic compounds (SVOCs) in the indoor environment. This program covers the following indoor media or compartments:

  • air,
  • sources,
  • sinks (i.e., sorption by interior surfaces),
  • contaminant barriers,
  • suspended particles, and
  • settled particles.

 The key input parameters are the

  • solid-air partition coefficients,
  • solid-phase diffusion coefficients,
  • gas-phase mass transfer coefficients, and
  • initial SVOC concentrations in indoor media.

This simulation program is for advanced users who have experience in indoor environmental quality modeling and exposure assessment.

Program i-SVOC runs on personal computers with Microsoft Windows XP, 7, or 8. As a stand-alone application, it does not require any third-party software. It has not been tested for use on Apple operating systems.

User’s Guide (xx pp, 1.4 MB)
Set-up Program (3.7 MB) At the present time, the user can access the User’s Guide after program installation by clicking the Windows Start button, “All programs”, and then select “i-SVOC 1.0.”



Air and Climate Change Research | Water Research | Ecosystems Restoration Research | Land Research | Technology: Sustainable Technologies Research, Environmental Technology Verification Program (ETV), and Technology Assessments

Jump to main content.