Phyllis Stanin

Vice President and Principal Geologist

Photo of Phyllis


Ms. Stanin has been a professional geologist for 30 years with expertise in hydrogeology and groundwater basin management. She became Principal Geologist and Vice President with Todd Groundwater in 2002. Phyllis has consulted on numerous projects involving regional hydrogeologic assessments, with a particular emphasis on managed aquifer recharge and conjunctive use. She has experience with numerous recharge methods (spreading basins, canals, vadose zone wells, and injection wells) and recharge water sources (recycled water, imported water). Her expertise includes fate and transport of contaminants in groundwater including emerging compounds; she has served as expert witness or a court-appointed consultant on seven cases involving alleged groundwater contamination.

Phyllis also has significant experience in groundwater development including well siting and design, geophysical logs, and field testing programs. She has successfully completed several groundwater management plans in accordance with the California water code and is currently managing the preparation of Salt and Nutrient Management Plans in accordance with the California Recycled Water Policy. She also prepared a successful deep injection well application for a Class I permit for brine disposal under the U.S. Environmental Protection Agency’s (USEPA) Underground Injection Control (UIC) Program.

She serves as Secretary for the American Society of Civil Engineers’ (ASCE) committee on Managed Aquifer Recharge Standards and is on the subcommittee for development of Guidelines for Developing a Managed Aquifer Recharge Project. Phyllis also served as the lead hydrogeologic investigator for a research project involving the fate and transport of NDMA in groundwater for a WateReuse Foundation research publication She has given numerous technical presentations, authored technical publications, and traveled to Cuba as a member of the AWWA’s first delegation of water professionals.

Academic Background and Professional Credentials:

Professional Geologist California, No. 5311
Certified Engineering Geologist California, No. 1899
Certified Hydrogeologist California, No. 482
Registered Geologist Arizona, No. 45605

MS, Environmental Management, Hydrogeology thesis, University of San Francisco, 1999
BS, Geology, University of North Carolina, 1978