The purpose of this document is to serve as a technical specification for accurate, reliable measurement of particulate matter using Continuous Emissions Monitoring Systems (CEMS) with reference to their use to support an emissions trading scheme. While measurement and regulation of particulate matter is a concern worldwide, this specification is unique, primarily because it is also designed to measure total load (equivalently average mass flow rate) over an extended period of time, as opposed to only mass concentration of particulates at any instant of time.