This document provides background information and recommendations for practitioners who are planning to use controlled pressure method (CPM) testing for vapor intrusion (VI) pathway assessment. CPM testing is also referred to as “building pressure cycling” and “building pressure control” testing. This document was developed under ESTCP project, "The VI Diagnosis Toolkit for Assessing Vapor Intrusion Pathways and Impacts in Neighborhoods Overlying Dissolved Chlorinated Solvent Plumes."