Donald P. Hanson, RG

Principal Hydrogeologist

Managed Aquifer Recharge and Water Supply Well Siting, Design, Construction Management, Rehabilitation

Permitting: Underground Storage Facility (USF), Water Storage (WS), Aquifer Protection Permit (APP), Analysis of Assured Water Supply (AAWS), Arizona Pollutant Discharge Elimination System (AZPDES), Voluntary Remediation Program (VRP)

Environmental Site Characterization and Remediation

Technical Consulting/Expert Witness

Don Hanson is a principal hydrogeologist and provides overall management and technical support for managed aquifer recharge (MAR), groundwater supply development, and environmental projects. He has over 36 years of experience and has authored more than 40 publications/technical presentations related to siting, design, and testing of groundwater recharge facilities, including aquifer storage and recovery (ASR) wells, vadose zone injection wells and infiltration basins. In addition to his water resources capabilities, he also has an extensive history managing complex environmental contamination sites, dealing with soil, vapor, and groundwater characterization and remediation. His extensive field background coupled with many years of technical consulting allow him to effectively manage a variety of water resources projects as well as remedial actions for environmental impairment.

As a recognized expert in production well design, permitting, and water quality evaluations, Mr. Hanson has successfully completed over 50 water supply and ASR wells. He has a wide range of technical capabilities in field investigations. Mr. Hanson has designed and managed the installation of numerous large-scale (>2,000 gpm) public supply wells, injection wells, pump-and-treat extraction wells, and monitoring wells. He has supervised numerous drilling operations using virtually every drilling method, including air-rotary and mud-rotary rigs, reverse circulation, cable tool, hollow-stem auger, solid-stem auger, air hammer, dual rotary and wireline coring.  He has also managed multiple well assessment projects using downhole video surveys, static and dynamic spinner logs, die-tracer tests, depth-specific groundwater sampling, variable-rate groundwater sampling, pumping videos, caliper logs, gyroscopic surveys, and acoustic televiewer logs.

Mr. Hanson has been involved with numerous groundwater recharge projects for the past 20+ years. He has directed siting and design and has successfully obtained multiple permits under  the Underground Storage Facility (USF), Water Storage (WS), and Aquifer Protection Permit (AAP) programs. He also developed methods for the enhancement of basin recharge projects through the addition of drain holes and infiltration trenches.

Coupled with his extensive water resources skills, he has also overseen soil and groundwater remediation and completed risk-based closures for sites impacted by many types of contaminants including volatile organic compounds (VOCs), heavy metals, fuel hydrocarbons, polychlorinated biphenyls (PCBs), pesticides and herbicides, asbestos, radiation, nitrates, and disinfection by-products. He managed an underground storage tank (UST) contract for a national fuel company, and managed a multi-year landfill site characterization including soil sampling, vapor monitoring, groundwater monitoring, groundwater flow and contaminant transport modeling, assessment of human health risks, and development of a Remedial Action Plan. Mr. Hanson works within numerous state and federal regulatory frameworks and is well respected as a technical expert in the environmental arena by his peers and the regulatory community.

Publications and Presentations

2023 – Pilot Borehole Analysis – The Good, The Bad and The Ugly. Arizona Water Annual Conference in Phoenix, Arizona. May 2023.

2019 – Managed Basin Recharge – Enhancements to Overcome Hydrologic Issues.  10th International Symposium on Managed Aquifer Recharge, Madrid, Spain, May.

2019 – Water Well Asset Management-Rehab Vs. Replacement. 92nd Annual Arizona Water Conference, Phoenix, Arizona, April.

2019 – Latest Developments in Well Drilling, Material Selection and Cost Benefit Analysis. Arizona Water – Water Treatment Committee Seminar Series, Phoenix, Arizona, February.

2018- Three Ps For Effective & Resilient Water Well Rehabilitation. In association with Todd Eden, HCT, LCC, 2018 Tri-State Seminar, Las Vegas, NV, September.

2018 – Entrained Air – Direct Injection’s Enemy. 91st Annual Arizona Water Conference, Phoenix, Arizona, May.

2018 – Water Well Evaluation and Rehabilitation; Recharge Projects – 101; O&M of Recharge Facilities; Basin Enhancement Case Studies.  Water Well and Recharge Workshop for Water Utilities, Albuquerque, New Mexico, January.

2017 – Managed Basin Recharge – Problems and Solutions.  International Seminar on Artificial Aquifer Recharge, Santiago, Chile, July.

2017 – Water Well Rehabilitation – Plugs, Patches and Liners. 90th Annual Arizona Water Conference, Phoenix, Arizona, May.

2017 – Geology, Hydrology and Groundwater Development.  Invited speaker, Trilogy STEM Club, Peoria, Arizona, February.

2016 – Managed Basin Recharge – Proper Planning Ensures Success.  9th International Symposium on Managed Aquifer Recharge, Mexico City, Mexico, June.

2016 – Artificial Recharge – Better Accuracy Through Site Specific Data Collection.  89th Annual AZ Water Conference, Glendale, Arizona, May.

2015– Slug Tests For a Better Water Supply Well Design.  31st Annual Tri-State Seminar-on-the-River, Las Vegas, Nevada, September.

2015 – Entrained Air – Is Artificial Recharge To Blame.  88th Annual AZ Water Conference, Glendale, Arizona, May.

2014 – Water Well Design for Drought and Climate Change Conditions.  National Groundwater Association Workshop, 2014 Groundwater Expo – Las Vegas, Nevada, December.

2014 – The End of Easy Water – Quantity vs. Quality.  87th Annual Arizona Water Conference, Glendale, Arizona, May.

2013 – High Capacity Well Design.  National Groundwater Association, 2013 Groundwater Expo – Nashville, Tennessee, December.

2013 – Water Reuse – New Perspectives on Policy and Science.  2013 Annual AHS Symposium – Shifting Boundaries, Recalibrating the Hydrologic Approach, September.

2013 – Well Screen Rehabilitation.  Groundwater Resources Association of California, High Resolution Tools and Techniques for Optimizing Groundwater Extraction for Water Supply Symposium, June.

2013 – Capitalizing on Well Capacity Analysis.  86th Annual AZ Water Conference, Glendale, Arizona, May.

2013 – Groundwater Recharge For The Future of Chile. Presented to the Chilean Government, Department of Agriculture, April.

2012 – Groundwater Recharge In Arizona.  Presented to the Chilean Government, Department of Agriculture, December.

2012 – High Capacity Well Design.  National Groundwater Association, 2012 Groundwater Expo – Las Vegas, Nevada, December.

2012 – 117 Degrees in The Shade – Solutions to a Hot Water Supply Well.  28th Annual Tri-State Seminar-on-the-River, September.

2012 – Basin Recharge – Planning For Success.  85th Annual AZ Water Conference, May.

2012 – Well Evaluation Concepts and Techniques, Well Rehabilitation and Modification Methods.  ADEQ Operator Certification Program Workshop, April.

2011 – Enhancing Basin Recharge.  A presentation to the City of Pomona, California, October.

2011 – Aquifer Recharge-From Vision to Reality.  84th Annual Arizona Water Conference, May.

2011 – Well Evaluation Concepts and Techniques, Well Rehabilitation and Modification Methods.  ADEQ Operator Certification Program Workshop, February.

2010 – Groundwater Recharge – Tips for Siting, Design, and Operation.  26th Annual Tri-State Seminar-on-the-River, September.

2008 – Groundwater Recharge and its Impacts on Non-Point Source Nitrate Contamination.  Peer reviewed article in The Professional Geologist, Volume 45, Number 4 August/September.

2006 – New Well Techniques for Well Installation.  22nd Annual Tri-State Seminar-on-the-River, September.

2006 – Developing a Wet Water Supply.  A presentation to Pulte Homes of Arizona, March.

2005 – Is It a Pump or Well Problem.  21st Annual Tri-State Seminar-on-the-River, September

2005 – Maintaining ASR Well Efficiency.  12th Biennial Symposium on Groundwater Recharge, June.

2005 – Well Cleaning Eliminates Costly Arsenic Treatment.  AWPCA 78 Annual Conference and Exposition, May.

2004 – The Data Game, How Much, What Kinds, and Why.  20th Annual Tri-State Seminar-on-the-River, September.

2004 – Chandler’s Reclaimed Water Program Yields 30 MGD Water Supply. Co-author, 19th Annual Water Reuse Symposium, September.

2004 – Water Solutions for Development. An invited presentation for the DR Horton Continental Series, Phoenix, Arizona, March.

2003 – Groundwater Recharge And Its Impacts On Non-Point Source Nitrate Contamination. 11th Biennial Symposium on Groundwater Recharge, June.