Education and Professional Development

• B.S., Geology, San Diego State University
• Post-Graduate Study, Engineering Geology, California State University, Hayward
• Occupational Safety and Health Administration 40-Hour Hazardous Waste Operations and Emergency Response Training

Registrations and Professional Affiliations

• California Professional Geologist #3832
• California Certified Engineering Geologist #1236
• Oregon Registered Geologist #G1349
• Oregon Registered Engineering Geologist #E1349
• Arkansas Registered Geologist # 122
• Tennessee Registered Professional Geologist # 00000707
• Association of Engineering Geologists
• American Association of Petroleum Geologists
• Sacramento Petroleum Association

Summary of Professional Experience

Mr. Mattey is a Registered Geologist and Certified Engineering Geologist in several states and has over two decades of experience in environmental geology and engineering geology for both public and private-sector clients. His experience includes geologic research and geotechnical, environmental, and hydrogeologic studies for a wide range of projects including residential, commercial, and industrial development.

Representative Experience

• Mr. Mattey conducted numerous underground storage tank investigations for public and private clients throughout northern and central California.
• Mr. Mattey performed Phase II studies and provided conclusions and recommendations based on chemical analyses.
• Mr. Mattey conducted geotechnical and environmental exploration, installation of slope inclinometers, extensiometers, and monitoring wells.
• Mr. Mattey performed hydrogeologic studies to determine ground water gradient and quality and aquifer permeability characteristics for environmental projects.
• Mr. Mattey performed packer tests on in -situ material to determine aquifer permeability characteristics.
• Mr. Mattey performed quarterly ground water monitoring programs and constructed ground water contour maps.
• Mr. Mattey provided detailed geologic research and mapping prior to siting of an original landfill and reported on the suitability of the site to be a landfill
• Mr. Mattey researched site history, regional and local hydrogeologic characteristics, and historical chronological stereoscopic aerial photographs for evidence of potential contamination sources.
• Mr. Mattey performed Sensitive Receptor Surveys for sites identified by the Regional Water Quality Control Board to be possible sources of contamination.
• Mr. Mattey performed geologic mapping of cuts during construction for evidence of discontinuities, such as landslides, faults, and seeps.
• Mr. Mattey performed stereoscopic aerial photograph interpretation for fault contracts, landslide configuration, and the extent of sea cliff erosion; detailed geologic field mapping, trench logging for fault contacts, and geotechnical soil profiles; down-hole logging of 30-inch diameter descent borings to a depth of more than 70 feet.
• Mr. Mattey completed geologic studies for single family residences in a 5,000-acre residential development and environmental impact reports for large industrial parks, and studied dam and landfill feasibility.
• Mr. Mattey completed geologic mapping, geophysics, and subsurface explorations to develop site characterization and provide recommendations for large-scale project development.