Monitoring for Protection of Existing Structures from Adjacent Construction

Patrick T. Hastings, Jr., P.G. President/Principal Geologist

Mr. Hastings is a licensed Professional Geologist in Florida, Virginia, Pennsylvania, South Carolina, and North Carolina, with over 20 years of expertise in geophysics and construction management. He is based in Orlando, Florida, and serves as the President of Seismic Surveys, LLC where he oversees operations, strategic initiatives, and project execution. A certified ICC Residential Building Inspector and certified pre-blast surveyor in West Virginia, Mr. Hastings combines technical expertise with a strong focus on public relations and stakeholder engagement. He holds a B.S. degree in Geology from the University of Michigan and a M.S. degree in Geology from the University of Minnesota. Mr. Hastings specializes in vibration monitoring, pre-construction surveys, and data analysis to support infrastructure and development projects. Key projects encompass a broad spectrum of vibration, noise, structure, and geotechnical monitoring services, including seismic assessments for construction and blasting activities, as well as detailed pre- and post-construction structure surveys.

Eric B. Rehwoldt, P.E., P.G. Vice President/Principal Engineer

Eric Rehwoldt is a Principal Engineer and Vice President of Seismic Surveys, LLC. He manages SSI’s Florida operations out of the West Palm Beach office and is in responsible charge of engineering services company-wide. Mr. Rehwoldt is a licensed Professional Engineer in 14 states, Including Florida, and a registered Professional Geologist. He has over 30 years of professional engineering and geoscience experience. He earned his B.S. in Geology from UCLA, and his M.S. in Geological Engineering from the University of Nevada, Reno. Prior to joining Seismic Surveys, Eric served as Senior Principal Engineer with Terracon Consultants and established a 21-year career with Schnabel Engineering, Inc. in the Washington, DC area. Eric’s geotechnical, geostructural, geophysical, seismic ground response, and geo-environmental project engineering experience spans the East and West coasts of the United States, and more than 50 countries. His technical specialties include structure condition/foundation distress surveys, seismic ground response, monitoring plan development, foundation design and construction, and soil/rock slope stability analysis and stabilization design.

James “TJ” A. Deane Jr., P.E., P.G. Vice President/Principal Engineer

TJ Deane is a Principal Engineer and Vice President of Seismic Surveys, LLC. Mr. Deane has B.S. Degrees in both Geology and Civil Engineering from the University of Maryland and a M.S. Degree in Geoscience from Pennsylvania State University. He is a licensed Professional Engineer in multiple jurisdictions (DC, DE, MD, NC, NJ, NY, TX, and VA) and Professional Geologist (NY and VA) with over 12 years of experience in the environmental and geotechnical consulting industries. Mr. Deane has specialized experience developing instrumentation monitoring plans for the protection of third-party structures from adjacent construction, developing and reviewing blast monitoring plans, estimating vibration magnitudes from various construction activities, conducting pre-condition surveys, vibration monitoring, sound monitoring, and building and soil movement monitoring using a variety of geotechnical instrumentation. Recent projects include highway transportation infrastructure improvements, utility infrastructure improvements, support-of-excavation for deep foundation installations, urban high-rise commercial development, bridge and railroad rehabilitation, monitoring for tunneling beneath urban areas, and construction and quarry blast monitoring.

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