Craig Cox

Principal Scientist, Vapor Pin Enterprises

Craig Cox currently serves as President and Principal Scientist for Cox-Colvin & Associates, Inc, and is responsible for providing managerial and technical oversight on major environmental projects conducted by the firm under RCRA, CERCLA, and Brownfield programs. Cox-Colvin & Associates, Inc., founded in 1995, provides environmental consulting services to public and private sector clients throughout the United States. Mr. Cox began his environmental consulting career in 1987 with Geraghty & Miller, Inc, (Arcadis) where he became the firm’s Midwest Regional Manager of CERCLA projects. Mr. Cox is yhe inventor of the Vapor Pin®, a sub-slab soil gas sampling device, and is the primary architect of a variety of environmental database applications, including Data InspectorTM.

Mr. Cox received his B.S. and M.S. degrees in Geology and Mineralogy from The Ohio State University and a Professional Degree in Hydrogeology from the Colorado School of Mines. Mr. Cox is a Certified Professional under Ohio EPA’s Voluntary Action Program and a co-author of “Background Metals Concentrations in Ohio Soils” (1996) and a contributing author on reports concerning background metals concentrations published by Ohio EPA.

Successful Vapor Intrusion Project Begins with a Carefully Conceived Conceptual Site Model

The accurate assessment of the vapor intrusion (VI) potential of any site depends on the development and use of a carefully conceived conceptual site model (CSM). We have all used CSMs in the past for a variety of environmental projects to better understand soil and groundwater source areas and their associated exposure scenarios; however, VI assessments offer a variety of new challenges. These challenges include understanding the historical use and disposal patterns of volatile organic compounds, the preferred volatile compounds used by various industries, the development history of the site, the volatile compound contributions from indoor and ambient air sources as well as those from preferential pathways such as sanitary sewer lines.

This presentation will touch on these issues as well as provide suggested approaches to help you better understand what to sample for, how to interpret the resultant data, and how to use the CSM to better understand volatile compound sources, their locations, and their ages. Using the CSM as a tool in the interpretation of analytical results will help you choose an appropriate mitigation or remediation approach. It could be as simple as making a few plumbing repairs.