The Chemical Mass Balance (CMB) air quality model is one of several receptor
models that have been applied to air resources management. CMB8 is a Windows 95 based
version of CMB modeling software that substantially facilitates the estimation of source
contributions to specieated PM10 (particles with aerodynamic diameters less than 10 μm),
PM2.5 (particles with aerodynamic diameters less than 2.5 μm), and Volatile Organic
Compound (VOC) data sets. This manual introduces CMB8 and its development history. It
describes minimal and desired hardware and software requirements and shows how to install
CMB8 on a personal computer. It explains CMB8 menu options and input and output file
formats. The manual provides a step-by step tutorial of CMB8 operations using the example
data sets provided with the model. Performance measures are briefly described, though their
use in practical applications is deferred to a separate applications and validation protocol. A
significant bibliography of CMB-related literature is included for those desiring more
information about the CMB, its utility and applications.