SUMMARY OF EXPERIENCE

Professional experience in hydrogeology and geology since 1969. President and Chief Executive Officer of 
a company  since 1979. Manages, supervises, and provides technical guidance for professional staff of hydrogeologists, engineers, chemists, regulatory specialists, and environmental scientists for a wide range of projects throughout the United States. Provides expert advice to clients on groundwater resource availability and development, as well as soil and groundwater contamination issues involving PRP identification; sources, timing, fate, and transport of contaminants; cost allocation; and remediation of soil and groundwater.

EDUCATION

Ph.D., Hydrology and Water Resources, University of Arizona, Tucson, Arizona, 1979.
M.S., Geosciences Hydrology, University of Hawaii, Oahu, Hawaii, 1971.
B.S., Geology, University of Hawaii, Oahu, Hawaii, 1969.

PROFESSIONAL AFFILIATIONS

Adjunct Professor, Department of Hydrology and Water Resources, University of Arizona, Tucson, Arizona
Adjunct Professor, Department of Geological Sciences, San Diego State University, San Diego, California
American Geophysical Union
American Society for Testing and Materials
American Water Resources Association
American Water Works Association
Association of Ground Water Scientists and Engineers
International Association of Hydrogeological Sciences
San Diego Association of Geologists
Society for Mining, Metallurgy, and Exploration

PROFESSIONAL REGISTRATION

Registered Geologist, Arizona, 1977
Registered Geologist, California, 1983
Registered Geologist, Virginia, 1984

EXPERIENCE RECORD

1979 to Present President and Chief Executive Officer, and Principal Hydrogeologist, San Diego, California.
1987 to 1990 Instructor, Hazardous Materials Management Certification Program, University of California at San Diego.
1973 to 1979 Hydrogeologist, Harshbarger & Associates, Inc. Consultants in Hydrogeology and Water Resources, Tucson, Arizona.
1971 to 1973 Research Associate, Department of Hydrology & Water Resources, and Teaching Assistant, Department of Geology, University of Arizona, Tucson, Arizona.
1969 to 1971 Research Associate, University of Hawaii- Manoa, Water Resources Research Center.

REPRESENTATIVE PROFESSIONAL ASSIGNMENTS

Soil and Groundwater Contamination

Provided direct oversight and management of Remedial Investigation/Feasibility Study (RI/FS) investigations at Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA)/Superfund sites in California, Arizona, and Texas, including Lockheed Corporation/ San Fernando Valley NPL Site, Burbank Operable Unit, Burbank, California; Montrose Chemical Corporation, Torrance, California; General Dynamics/U.S. Air Force Plant No. 4, Fort Worth, Texas; Hughes Aircraft/ U.S. Air Force Plant No. 44, Tucson, Arizona; and Beckman Instruments Site, Porterville, California. Negotiated approval of RI/FS work plans on behalf of PRPs with USEPA and state regulatory agencies; evaluated, analyzed, and presented results of investigations; and prepared evaluations of remedial action options.

Groundwater Supply and Development

Conducted geologic mapping and reconnaissance for a hydrologic study in central Colorado for industrial water supply.

Evaluated complex surface water groundwater interactions in north central Nevada for a major mining company to evaluate the effects of mine dewatering and water disposal on water levels and water quality on wetlands and ranch land.

Participated in and directed regional evaluations of hydrogeologic conditions for groundwater supply for large scale proposed mining operations, designed and tested large diameter production wells for water supply, evaluated impacts on water rights of proposed groundwater development in groundwater management areas, and provided analysis and opinions to regulatory agencies and public agencies responsible for various aspects of water supply and management. Evaluations have included the review and analysis of groundwater modeling conducted by agencies and consultants, as well as the compilation, calibration, and application of digital groundwater models to aquifer studies and wellfield design and analysis of long-term impacts.

Remedial Design and Implementation

Designed large scale reclamation wellfields to recover groundwater contaminated with volatile organic hydrocarbons and metals for Superfund sites in Arizona and California, designed injection wellfields to dispose treated water, and designed a DNAPL recovery system for a Superfund site in California. Remedial designs have included the application of various groundwater models to large-scale, regional, multiple aquifer systems including the fate and transport of multiple plumes from multiple responsible parties, negotiating remedial designs for large-scale groundwater extraction and injection systems with State and Federal agencies and other responsible parties, and advising clients on implementation.

Litigation Support

Provided technical support, evaluation of fate and transport, source, and trigger issues in insurance litigation on behalf of major industrial clients and national law firms across the United States in both Federal District and State Courts. Testified at deposition, jury and bench trials on a complete range of hydrogeologic issues related to the recovery of insurance monies for remedial assessment and clean ups at chemical manufacturing, aerospace, and metal processing facilities throughout the United States. Also provided litigation support and expert witness testimony in tort suits and insurance cost recovery actions arising from the application of pesticides to large agricultural areas, and the impact of pesticide residues on regional groundwater and sole source aquifer water supplies. Also testified at trial and in mediation regarding allocation of damage to groundwater among multiple responsible parties. Expert witness retentions have included the analysis and evaluation of digital groundwater models compiled and applied by other experts, the compilation, calibration, and application of digital groundwater models on behalf of clients to evaluate the fate and transport of contaminants in groundwater, assist in evaluating sources and timing issues for both torts and cost recovery from insurance companies, and to evaluate issues concerning timing, exposure, and dose associated with personal injury claims.

PUBLICATIONS

Leonhart, L.S., D.R.  2002. “Wet Water vs. Paper Water: Groundwater Management in Southern Arizona, A Case Study” in Proceedings of the International Conference on Balancing the Groundwater Budget, International Association of Hydrogeologists, May 12-17, 2002. Darwin, NT, Australia.

Niemeyer, R.A., M.A. Palmer, 1993. "Extraction Well Design for DNAPL Recovery." Proceedings of the 7th National Outdoor Action Conference on Aquifer Restoration, Groundwater Monitoring, and Geophysical Methods, pp. 193-206. National Groundwater Association, Dublin, Ohio, May 25-17, 1993.

Niemeyer, R. A., M. A. Palmer, 1992. "An Innovative Well Design for DNAPL Recovery from the Saturated Zone." Poster Presentation, Aquifer Restoration: Pump and Treat and the Alternatives. Las Vegas, Nevada, September 30, 1992.

 D. R. 1982. "Field Investigation of Transport of Volatile Organics." Proceedings of the Deep Percolation Symposium, Scottsdale, Arizona. October 26, 1982; Arizona Department of Water Resources Report No. 4.

Harshbarger, J. W., and D. R. 1981. "Hydrology and Mining in the Tucson Area." Mining Engineering 33(11): June 1981.

C. A. McCauley. 1981. "Results of Acidizing Water Wells in Arizona." Water Resources Bulletin June 1981.

1980. "Application of a Digital Computer Model to Mine Dewatering Design." Minneapolis, Minnesota: Paper presented at the fall Meeting and Exhibit, Society of Mining Engineers of AIME, October 22 24, 1980.

Analysis of Factors Affecting Water Level Recovery Data. Ph.D. dissertation, University of Arizona, Tucson, Arizona.

J. W. Harshbarger. 1975. "Non Laminar Flow Head Losses in a Production Well Field." Paper presented at 1975 fall Meeting of American Geophysical Union, Hydrology Section, San Francisco, California.

F. L. Peterson. 1974. "Effects of Well Injection on a Basaltic Ghyben Herzberg Aquifer." Groundwater 12(1) 4 9.

Peterson, F. L. 1973. "Subsurface Disposal of Storm Runoff." Journal Water Pollution Control Federation 45(8): August 1973.

Peterson, F. L. 1971. "Effect of Storm Runoff Disposal and Other Artificial Recharge to Hawaiian Ghyben Herzberg Aquifers." Honolulu, Hawaii: University of Hawaii, Water Resources Research Center; Technical Report No. 54.

F. L. Peterson. 1970. "Artificial Recharge Practices In Hawaii." Honolulu, Hawaii: University of Hawaii, Water Resources Research Center; Technical Report No. 43.