
Justin E Headley, M.S.
Project Hydrologist
Expertise
Mr. Headley is a Project Hydrologist and joined Hydro Geo Chem, Inc. in 2024. He has approximately 13 years of professional experience. His duties at HGC have included environmental sampling; lithologic logging and well construction; soil and groundwater remediation system operation; maintenance and monitoring; data collection and interpretation; and equipment maintenance. Projects have been performed for private, municipal and regulatory clients, including for ADEQ under the Water Quality Assurance Revolving Fund (WQARF).
Education
-M.S. Hydrology, University of Arizona, 2024
-B.S. Hydrology & Atmospheric Sciences, Geosciences minor, University of Arizona, 2022
-A.A.S. Meteorology, Community College of the Air Force, 2014
-40 Hour OSHA Hazardous Waste Operation and Emergency Response Training, 2024
-NREMT Emergency Medical Responder, 2020 initial 3-year cert & 2023 recert
-FAA Senior Parachute Rigger, since 2007
Representative
Experience
• Stone & Grant, Tucson, Arizona – Measurement of water levels in monitoring wells. Sampling groundwater for per- and polyfluoroalkyl substances (PFAS) and chlorinated ethenes. Collection and interpretation of operations, maintenance & monitoring data. Oversight and lithologic logging during construction of permanent soil vapor probe wells.
• West Central Phoenix - East Grand Ave., Phoenix, Arizona – Provided direction and assistance on quality assurance protocols and standard operating procedures for groundwater sampling for PFAS analysis.
• South Mesa, Phoenix, Arizona – Groundwater sampling for VOCs and PFAS from monitoring and BarCad wells. Measurement of water levels in monitoring wells.
• North Plume, Phoenix Arizona – Groundwater sampling for PFAS from monitoring wells. Measurement of water levels in monitoring wells.
• 16th & Camelback, Phoenix Arizona – Groundwater sampling for PFAS from monitoring wells. Measurement of water levels in monitoring wells. .
• 7th St & Arizona Ave WQARF Site, Tucson, Arizona –Site-wide groundwater sampling for VOCs and PFAS from passive diffusion bags (PDBs) and Hydrasleeves. SVE O&M, GW sampling. Performed soil vapor sampling and mass extraction calculations. Performed SVE influent/effluent air quality sampling, SVE system shutdown, startup and rebound sampling. Collection and interpretation of operations, maintenance & monitoring data.
• White Mesa Mill, Utah - Ongoing technical support on hydrogeological and hydrogeochemical evaluation and interpretation for a uranium mill site in southeastern Utah. Site involves sulfidic mineral oxidation and nitrate & chloroform solute plumes in sedimentary bedrock aquifer.
• Hwy 260 & Johnson, Pinewood-Lakeside, Arizona – Wellhead carbon treatment system operations, maintenance and monitoring including sediment filter changeouts, and groundwater sampling. Sampled groundwater from monitoring wells and privately-owned pumping wells. Preparation of technical memorandum.
• Miracle Mile WQARF Site, Tucson, Arizona – Groundwater sampling for PFAS from monitoring wells. Measurement of water levels in monitoring wells.
• FICO Pecan Orchard, San Simon, Arizona – Interpretation of available vadose zone and groundwater hydrogeologic data. Constructed nitrate subsurface transport and fate model using Hydrus 1D. Results from model output allowed for the completion of an Aquifer Protection Permit (APP) closure application.
• Camp Little FUDS Site, Nogales, Arizona – Provided research and technical support for ongoing investigations into the safety risk and environmental impact of potential unexplored ordinance (UXO) the Camp Little Formerly Used Defense Site (FUDS) in Nogales, Arizona.
Previous Experience
• Research Assistant (RA) – McIntosh Hydrobiogeochemistry Group, University of Arizona. Lead researcher on a multi-year study that uses geochemistry to determine the seasonal variability of source waters contributing to streamflow in Cienega Creek Natural Preserve (CCNP). Used surface water auto-sampling equipment to investigate the sources and transport mechanisms of trace metals in surface flows downstream of mining activities in the Santa Rita Mountains. Laboratory experiments and research focus on sulfide mineral oxidation and arsenic, iron, & copper transport under different biogeochemical conditions.
• Teaching Assistant (TA) – University of Arizona. TA for a graduate-level course on aqueous geochemistry and an undergraduate-level course on the interconnectivity of Earth systems. Instructed labs and guided students through hands-on activities related to pH, alkalinity & the carbonate system, gas dissolution, mineral precipitation, and redox reactions. Recipient of the 2024 College of Science Graduate Teaching Award.
• Research Assistant (RA) – Kapp Structural Tectonics Group, University of Arizona. Prepared rock samples for geochronological dating through gravimetric, magnetic, and chemical separation of target minerals from host rock. Generated ages for rock samples via laser ablation-inductively coupled mass spectrometry (LA-ICP-MS) of uranium & thorium isotopes, furthering research into lithosphere drip beneath the Colorado Plateau.
• Weather Forecaster – United States Air Force. Analyzed precipitation rates and durations of monsoonal storms and their impact on Davis-Monthan Air Force Base, Arizona, resulting in the creation of a standardized flood forecasting procedure. Led nine-member severe weather forecasting team: Disseminated over 400 weather warnings across 24 Department of Defense installations, safeguarding sensitive equipment valued at over 30 billion dollars. Skilled in severe weather RADAR analysis: Forecasted four tornadoes during Wyoming severe weather outbreak, alerted F.E. Warren Air Force Base’s 6,200 personnel to take shelter with advance notice.
Publications
2024: The Seasonal Variability of Trace Metals and their Transport Mechanisms in Intermittent Streams (master's thesis). University of Arizona.
2022: Groundwater Contributions to Streamflow in Cienega Creek During the 2021 North American Monsoon (Senior Capstone). University of Arizona.
Other Technical Skills
Field sampling and water quality testing of surface streamflow, sampling for trace metals, electrochemistry and analysis of redox speciation, laboratory extraction and isolation of compounds, hydrogeochemical modeling with PHREEQC, end-member mixing analysis and hydrograph separation using geochemical and isotope tracers, groundwater modeling with MODFLOW, surface stream gaging and calculating discharge, creating stage-discharge rating curves and surface flow simulations in HEC-HMS/HEC-RAS, using and maintaining ISCO autosamplers to capture storm runoff, aquifer pumping and recovery testing, hydraulic conductivity/infiltration testing, weather RADAR and multi-spectral meteorological satellite imagery analysis, forecasting terrestrial convective and non-convective weather, setup and operation of field-scale meteorological observing systems.
Memberships
- Climbing Association of Southern Arizona, member since 2015
- Arizona Hydrological Society, member since 2019
- Southern Arizona Rescue Association, member since 2020
- Arizona Geological Society, member since 2022
- Mineralogical Society of America, member since 2022
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