John Sciacca is a California Professional Geologist with over 30 years of professional experience. He holds an M.S. in Geology from the University of California, Davis and is principal hydrogeologist for AECOM in northern Nevada. Mr. Sciacca previously served as the Director of the Nevada Water Science Center for the U.S. Geological Survey. He currently provides technical consulting and oversight for hydrologic and hydrogeologic investigations and data collection for water resources and environmental applications for AECOM. Throughout his career, Mr. Sciacca has used and interpreted DPT for project applications. Some examples include: hydrostratigraphic analysis of CPT logs to support monitoring network design and model refinement; use of DPT to define dissolved phase and DNAPL plumes; and, DPT to support design of in situ chemical oxidation and electrical resistance heating remedial actions.