In Part One of the manual we introduced and explained the importance of standardized terminology. The E 1903 Standard [1] has 37 standard definitions. Many of these definitions are related to sampling and site investigation activities that may be associated with the Phase II environmental site assessments (ESAs). Closer examination of some of the definitions in the E 1903 Standard provides additional insights into the intent and scope of the Standard. We have already reviewed the definition of a business decision. The resolve of the ASTM E 50 Committee to include it in the E 1903 Standard demonstrates that business risk management considerations are an integral part of the Phase II ESA process.