Garry Stanley, P.G.

Garry Stanley is a Principal Geologist Consultant based in Illinois with more than 20 years of environmental consulting experience focused on site investigation, groundwater assessment and remediation, and vapor intrusion (VI) evaluation and mitigation.

Garry Stanley is a Principal Geologist Consultant based in Illinois with more than 20 years of environmental consulting experience focused on site investigation, groundwater assessment and remediation, and vapor intrusion (VI) evaluation and mitigation.


Garry’s experience includes the management of several large interdisciplinary projects including contaminated site assessment, remediation of recalcitrant contaminants, and vapor intrusion assessment and mitigation. He has extensive technical and regulatory experience and works with clients to address a multitude of persistent contaminants including chlorinated solvents, petroleum hydrocarbons, 1,4-dioxane, and inorganic compounds. Garry is actively involved with the design, implementation and operation and maintenance (O&M) of groundwater remediation systems and technologies including pump & treat, co-metabolic in-situ bioremediation, enhanced in-situ bioremediation (EISB), in-situ chemical oxidation (ISCO), advanced oxidation processes (AOP), engineered phytoremediation, and monitored natural attenuation (MNA).

Among Garry’s key benefits to clients is his experience in site strategy development, RI/FS evaluations, pilot testing and remedial design, site investigation and characterization, VI assessments, litigation technical support, and regulatory communication and negotiations. Garry has assisted clients who are regulated under a variety of frameworks, including RCRA, CERCLA, state-lead, and voluntary cleanup programs across the Midwest and Western Regions, including Colorado, Illinois, Indiana, Kansas, Oklahoma, and Wyoming. To better assist his clients, Garry develops cost-effective alternatives to conventional remedial approaches that take advantage of the latest technologies and innovative applications of existing technologies while achieving regulatory acceptance to address contaminants within complex geologic settings.

Garry has also directed and managed VI assessments to evaluate VI impacts, using state of the art investigation methods, at numerous commercial, industrial, and residential locations throughout the United States. During which, he has developed various Community Relations and Notifications Programs, attended public meetings, and provided demonstrations of VI assessment techniques to multiple regulatory agencies.

To advance the state of the practice, Garry’s efforts have focused on the use of engineered subsurface biogeochemical conditions in soil and groundwater to promote in situ degradation of environmental contaminants. He is an active participant in Geosyntec’s internal groundwater practice group and VI practice group and serves as the Geosyntec VI point of contact for five midwestern states.

Contact Garry Stanley at This email address is being protected from spambots. You need JavaScript enabled to view it. or +1-630-203-3357.

Career Summary of Garry Stanley, P.G.

  • Specialties: Site Investigation and Remediation, Groundwater Assessment and Remediation, Vapor Intrusion Site Characterization
  • Practice Areas: Contaminated Site Assessment and Cleanup
  • Disciplines: Hydrogeology, Geology
  • Education: M.S., Geohydrology, Illinois State University, 1998; B.S., Geology, Illinois State University, 1996
  • Registration: Professional Geologist, IL 196.001305; Professional Geologist, IN 2604; Professional Geologist, KS 841; Professional Geologist, WY 3765

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