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Specialties:

groundwater assessment and remediation

site investigation and remediation

surface water/groundwater supply studies and development


Education: 

Ph.D., Earth Sciences, University of California, Santa Cruz, 1987

B.S., Geology, Stanford University, 1980


Gordon Thrupp, PhD, PG, CHG

Primary Disciplines:
Hydrogeology, Earth Sciences,

Dr. Thrupp is a senior hydrogeologist based in northern California with more than 25 years of experience evaluating geological and hydrogeological conditions. He has focused on quantitative analysis of flow of groundwater and soil-gas. He has developed groundwater flow models as tools for assessing water resources, engineering design alternatives, and remedial options for numerous projects throughout the United States. Additionally, Dr. Thrupp has conducted testing for design and performance assessments of numerous soil vapor extraction systems.

Practice Specialties
Considered a leading groundwater modeler, Dr. Thrupp has applied models to conduct water resource evaluations; evaluate the hydraulic connection between surface water and groundwater; investigate the potential for contaminant migration and sea water intrusion; evaluate hydraulic containment alternatives; locate and design municipal supply wells; design sewage and groundwater infiltration basins; assess impact of open-pit mines on groundwater systems; and predict seepage rates into excavations for dewatering feasibility studies.

He has consulted on a number of high profile assignments involving groundwater resources evaluations, sea water intrusion, and groundwater production. Dr. Thrupp has conducted water needs assessments and characterized hydrogeologic regimes, and evaluated potential groundwater mounding associated with operation of infiltration basins. He has overseen the design and installation of groundwater extraction wells at depths of up to 550 feet; evaluated potential groundwater mounding associated with infiltration basins, and developed and refined groundwater models to evaluate remediation alternatives for containment of chlorinated solvents and perchlorate impacts to groundwater.

Advanding the State of the Practice
Dr. Thrupp continues to advance the state of the practice through his design and construction of instruments to record transient pressure response to soil vapor extraction (SVE) or landfill gas extraction. He has championed the analysis of transient pressure response to make much more reliable assessments of pneumatic conductivity than are possible by steady-state measurements, and to quantify the influence of leakage of air through the ground surface, which is the dominant control on the extent of influence of SVE. Dr. Thrupp has conducted efficient transient-response pneumatic testing and applied analytical models of soil vapor flow as tools to evaluate the extent of influence and optimize the design of soil vapor and landfill gas extraction systems.

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