The U.S. Army Public Health Command (USAPHC) Technical Guide (TG) 230 is provided as a standard tool to assess and characterize chemical exposures during deployments in a manner that is consistent with established joint military risk management doctrine (described above). This guide provides a range of military exposure guidelines that are health-based chemical concentrations in air, water, and soil for various military exposure scenarios during deployments. The 2013 Revision of TG 230 is the first minor revision since June 2010. This revision provides improved guidance on conducting health risk assessments, and addresses issues with the 2010 revision found after publication.