Technical Leadership

James M. Emery

James M. Emery, P.G.

President and Chief Executive Officer

James Emery has served as President and Chief Executive Officer of EGGI since founding the firm in 1989, and is a nationally recognized leader in the creation of successful groundwater resource assessment, development and protection techniques. He is a highly experienced exploration hydrogeologist, groundwater development, and well field design specialist and has participated in or supervised over 1,400 successful groundwater development and protection programs for major municipal and private water development projects throughout the eastern United States. In addition, James has been involved in several international projects, including advanced groundwater development programs in Somalia, Sudan, South Africa and the Dominican Republic.

Under his direction, EGGI has become well known for its expertise in groundwater exploration, development, monitoring, management, and protection. The firm has earned a reputation in the groundwater industry for unraveling very complex hydrogeological problems and providing clear, scientifically based solutions. EGGI is professionally recognized by the EPA, the United States Geological Survey (USGS), and the National Association of Groundwater Scientists and Engineers (AGWSE) as a leader in groundwater resource investigations and groundwater protection for public water supplies.

Mr. Emery has prepared numerous policies and standards for use by a variety of public agencies for groundwater protection and development programs. He has served as an appointed member of the Loudoun County Water Resources Technical Advisory Committee (WRTAC), Loudoun County, Virginia, for a period of 14 years; and, formerly served as Chairman of the Groundwater subcommittee for WRTAC. He has also served on several groundwater advisory committees for numerous South Atlantic, Mid-Atlantic, and New England organizations. James was a member of the Massachusetts Department of Environmental Quality Engineering Rock Well Study Committee which determined state guidelines for municipal rock wells. Additionally, he has provided expert testimony for a wide range of technical issues associated with groundwater rights, groundwater protection, and groundwater contamination.

Mr. Emery has a B.Sc. in Geology with a concentration in Hydrogeology from the University of New Hampshire.

Selected Publications, Presentations and Honors >

Emery, J.M., Tinkham, D.J. and Foster, p.., 2013, Delineation of a Wellhead Protection Area around the Lyndhurst Well, Augusta County, Virginia, presented at the 22nd Annual Maryland Ground Water Symposium, September 26, 2013.

Foster, P. J., Emery, J.M., and Hardcastle, K.C., 2012, The Impacts of the Earthquake that Struck Near Mineral Virginia on Groundwater Resources in Northern Virginia. Oral presentation at the 61st Annual Meeting of the Southeastern Section of the Geological Society of America, Asheville, North Carolina.

Emery, J.M. and Hardcastle, K.C., 2011, Abstract, The Impacts on Groundwater Resources in Northern Virginia that were caused by the recent 5.8-Magnitude Earthquake in Mineral, Virginia.

Brooks, J.A. and Emery, J.M., 2011, Evaluating Recharge Sources for Bedrock and Sand & Gravel Production Wells, The 2011 New Hampshire Water and Watershed Conference, March 25-26, 2011, Plymouth State University, Plymouth, New Hampshire.

Brooks, J.A., and Emery, J.M., 2010, NH Water Works Association, April Technical Meeting, Presentation: Water Supply Development from Bedrock Aquifers in Newmarket, New Hampshire.

Emery, J.M., Crawford, T.J., and Karr, P.R., “Groundwater Development for Public Water Supply -- A Case Study -- Cobb County-Marietta Water Authority -- Cobb County, Georgia,” -- Proceedings of the Georgia Water Resources Conference, University of Georgia.

Emery, J.M., and Crawford, T.J., “Groundwater Exploration and Development in Cobb County for the Cobb County-Marietta Water Authority, Mountain Park Area 3” -- Georgia Geological Society 29th Annual Field Trip, Atlanta, Georgia, Guidebook Volume 14, Number 1.

Marts, J.M. and Emery, J.M., 2007, High Resolution Monitoring of Specific Conductivity as a Proxy for Chloride in a Valley-Fill Aquifer in Ashland, New Hampshire. Poster presentation at the 42nd Annual Meeting of the Northeastern Section of the Geological Society of America, University of New Hampshire, Durham, New Hampshire.

Tinkham, D.J., Foster, P.J., Emery, J.M., and Brooks, J.A., 2007, Implications for Aquifer Analysis from Discrete, Anisotropic Water Level Impacts Observed During Pumping Tests Performed in Fractured-Bedrock Aquifers. Oral presentation at the 42nd Annual Meeting of the Northeastern Section of the Geological Society of America, University of New Hampshire, Durham, New Hampshire.

Foster, Peter J., Hardcastle Ken C., Brooks, John A., and Emery, James M., 2006, Groundwater Exploration and Development in Sedimentary and Igneous Rocks of the Mesozoic Culpeper Basin, Fauquier County, Virginia – A Case Study; Geo. Soc. Am., Abs. and Prog., v. 38, no. 3, p. 12.

Brooks, J.A. and Emery, J.M., 1999, Exploration of Groundwater Resources in Bedrock Aquifers using Surface Geophysical Methods, Geol. Soc. Am., Abs. and Prog., v. 31, no. 3, p. 7.

Hardcastle, K.C., Brooks, J.A., Emery, J.M., and Tinkham, D.J., 1991, Remote Sensing of Groundwater-Controlling, Bedrock Fracture Systems: Photolineament and Magnetometer Analyses in the Culpeper Basin, Virginia, Geol. Soc. Am., Abs. and Prog. 23(1);41.

Emery, J.M., and Tinkham, D.J., 1992, “Groundwater Exploration and Development in Fractured Bedrock in the Piedmont,” American Water Resources Association -- National Symposium on Groundwater Availability in the Piedmont.

Hardcastle, K.C., Brooks, J.A., Emery, J.M., and Tinkham, D.J., Remote Sensing of Groundwater-Controlling, Bedrock Fracture Systems: Photolineament and Magnetometer Analyses in the Culpeper Basin, Virginia, Geol. Soc. Am., Abs. and Prog.,v. 23, no. 1, p. 41.

Emery, J.M., 1989, Decade of North America Geology Project/Geological Society of America ... Hydrogeology of North America Volume, Chapter 21 -- Regional Synthesis of Northeast Appalachians/United States Department of Interior -- Geological Survey.

Emery, J.M., and Cook, G.W. IV,, 1986, “Determination of the Nature of Recharge to a Bedrock Fracture System,” National Water Well Association Technical Division Eastern Regional Conference, Boston, Massachusetts.

Selected Speaker

Keynote Speaker – “The Past, Present and the Future of Groundwater Resources in Fauquier County”, Fauquier County Water Summit, Fauquier County, Virginia.

Selected Speaker – “Groundwater Resource Evaluation and Implementation of Groundwater Resources Management and Groundwater Protection Practices”, Shenandoah Valley Watershed Roundtable Conference, James Madison University, Harrisonburg, Virginia.

Selected Speaker – “Groundwater Development in Fractured Bedrock Aquifers in the Georgia Piedmont”, Georgia Water and Pollution Control Association, Inc. Annual Conference and Exposition, Cobb-Galleria Center, Smyrna, Georgia.

Selected Speaker – “Groundwater Resource Evaluation of the Augusta County Region and Development of Groundwater Protection Ordinance,” Augusta County Board of Supervisors, Augusta County, Virginia.

Selected Speaker – “Groundwater Development in North Georgia -- A Viable Alternative for Public Water Supply”, Georgia Rural Water Association Fall Conference, Helen, Georgia.

Selected Speaker – “Groundwater Exploration and Development in Fractured Crystalline Bedrock of the Piedmont”, United States Geological Survey, “Groundwater Exposition”, Savannah, Georgia.

Selected Speaker, Groundwater Seminar, Virginia Regional Health Department, Office of Water Supply Programs, Virginia.

Selected Speaker – “Development and Protection of Groundwater Resources in Fractured Crystalline Bedrock Aquifers”, United States Geological Survey, Stone Mountain, Georgia.

Selected Speaker – “Results of Groundwater Development in Fractured Crystalline Rock Aquifers”, Georgia Municipal Association, Jekyll Island, Georgia.

Selected Speaker – “Impact of Gravel Mining on Groundwater Quality”, Groundwater in New Hampshire's Future - A Symposium, the University of New Hampshire, Durham, New Hampshire.

Selected Speaker – Conference on Groundwater Development from Fractured Bedrock Sources in the Piedmont of the Eastern United States, United States Geological Survey, Charlotte, North Carolina.

Selected Panelist – Conference on Groundwater Development from Fractured Bedrock Sources in the Piedmont of the Eastern United States, United States Geological Survey, Charlotte, North Carolina.

Selected Guest Speaker – “Remote Sensing and How it Relates to Groundwater Exploration”, National Association of Groundwater Scientists National Convention, Baltimore, Maryland.  

Peter Garrett, Ph.D., P.G., M.C.G., C.G.W.P.

Senior Project Manager, Senior Scientist

Peter Garrett co-founded EGGI in 1989. Peter has an international reputation for his contributions to groundwater protection and best management practice, the fate of MTBE in groundwater, the study of oil spills in groundwater, and sampling techniques for groundwater and soils. He has published a variety of articles and books on those subjects. Representative projects include groundwater supply exploration and development, wellhead protection studies, landfill closure studies, gravel mining investigations and geologic, hydrogeologic, public policy studies related to groundwater, and the investigation, remediation, and closure of sites contaminated with petroleum. The company receives many letters of recommendation from private clients, and is consistently rated by government agencies at the highest level, based upon professional qualification statements submitted.

Selected Publications, Presentations and Honors >

2011, Jim Doherty Excellence Volunteerism award by the Maine Water Utilities Association

2010, “Rethinking Recharge to Augment Yield” and “Protection of Groundwater from Contamination” in Sustainable Ways to Manage your Groundwater Supply, Seminar offered by New England Water Works Association.

2009, “Advantages and Process of Artificial Recharge”, Presentation at New England Waterworks Association Fall 2009 Water Resources Symposium, Milford, MA.

2008, “Fuel Oil Spill near Public Water Supply Wells, Rumford, Maine”, J. New England Water Works Association, v. 122, #3, p.242-252.

2008, “Water Level Declines During Pumping Tests vs. Aquifer Geometry: Radial, Linear and Bathtub Flow”, Presentation at the New England Water Works Association Annual Conference, Burlington, Vermont.

2007, “Artificial Recharge in New England”, p. 335-345 in “Management of Aquifer Recharge for Sustainability”, Peter Fox (Ed.) Acacia Publishing, Phoenix, AZ.

2007, “Why Water Suppliers Should Care about Stormwater Management”, J. New England Water Works Association, v. 121, #2, p.136-151. 

2007, “The Natural End of Landfill Leachate. Examples From Maine”, Thirteenth Annual Maine Water Conference, Augusta, Maine. 

2006, “Capture of Contaminants” Presentation at the New England Water Works Association Seminar on Understanding Well Withdrawal Impacts, Hartford, Connecticut. 

2006, “Artificial Recharge: Taking Seasonal High River Flows and Storing Them in Groundwater”, Presentation at New England Waterworks Association Fall 2006 Water Resources Symposium, University of New Hampshire, Durham, New Hampshire.

2005, “Harvesting, not Exploiting Aquifers: Determining Sustainable Yields for Public Water Supply and Bottled Water in Fryeburg, Maine”. Presentation at the National Groundwater Association Focus Conference on Eastern Regional Ground Water Issues, Portland, Maine.

2005, “Linear Flow in Granular Aquifers”. Presentation at the National Groundwater Association Focus Conference on Eastern Regional Ground Water Issues, Portland, Maine.

2005, “The Natural End of Landfill Leachate: Examples from Maine”. Presentation at the National Groundwater Association Focus Conference on Eastern Regional Ground Water Issues, Portland, Maine, and New England Water Works Association Annual Conference, Rockport, Maine.

2004, Spills of Fuel Oil in Rumford Maine, Investigation, Remediation, and Pumping Test on Rumford Water District Production Wells. Three reports to Maine Department of Environmental Protection.

2004, “Hydraulic Analysis of Linear Sand and Gravel Aquifers”: Presentation at the New England Water Works Association Spring Joint Regional Conference and Exhibition, Worcester, MA.

2004, “Best Management Practices for Groundwater Protection A Guide for Local Officials and Public Water Suppliers” with Maine Rural Water Association, for Maine Drinking Water Program.

2003, “Golden Guidelines of Groundwater Contamination”: Presentation at the New England Water Works Association Annual Conference, Quebec City.

2003, Groundwater Exploration and Development, Milltown Aquifer, Calais, Maine: for City of Calais.

2002, Contaminants in Groundwater: Presentation in Understanding Well Withdrawal Impacts Seminar and Short Course presented by New England Water Works Association, Holliston, MA and Hartford CT.

2002, Model Wellhead Protection Ordinance for Town of St. George: Presentation at the 2002 Maine Water Conference, Celebrating 30 years of the “Clean Water Act”, Augusta, Maine.

2002, A Bedrock Aquifer Wellhead Protection Area Delineation with a Plethora of Data: Presentation at the 2002 Maine Water Conference, Celebrating 30 years of the “Clean Water Act”, Augusta, Maine.

2000, The Unintended Consequences of Small Spills of Gasoline with MTBE. Article in LUSTLINE, June, 2000.

2000, Small Spills of Gasoline with MTBE – Effects in Groundwater, Mealey’s MTBE Conference, Marina del Rey, CA May 11-12, 2000.

2000, MTBE as a Common Groundwater Contaminant, New England Water Works Association spring Joint Regional Operations Conference and Exhibition, Worcester, MA, April 6, 2000.

2000, One Expert’s Addendum to the “60 Minutes” Broadcast on MTBE. Article in LUSTLINE, February, 2000.

2000, Appearance on CBS 60 Minutes Segment on MTBE. January 16, 2000.

1999, Evaluation of the British Canal Well, a High Yield Bedrock Well Located Close to the Coast, Castine, Maine. Report to the Castine Water Department.

1998, Motor oil-like contamination in Tenants Harbor Village, St. George, Maine. Report to the Maine Department of Environmental Protection. 

1995, Petroleum Contamination and Groundwater: Lessons Learned from History, Lessons Learned in the Remediation of Petroleum-Contaminated Sites in Maine Conference, Maine Department of Environmental Protection and Consulting Engineers of Maine, Augusta, Maine.

1993, The Costs of No Wellhead Protection: A Study of the Costs of Cure vs. Prevention, report for Maine Drinking Water Program, distributed nationwide.

1993, with Dale F. Doughty, Do We have Biodegradation Here? Discussions at a Fuel Oil Pump-and-Treat Site: Lessons Learned in the Remediation of Petroleum-Contaminated Sites in Maine Conference, Maine Department of Environmental Protection and Consulting Engineers of Maine, Augusta, Maine.

1992, Wellhead Protection Planning for Clinton, Maine, demonstration project for US Environmental Protection Agency and Clinton Water District.

1991, Experience with Classification Systems for Groundwater Susceptibility. First Ontario Conference on Groundwater Protection. 

1989, with J.S. Williams, C.F. Rossoll, and A.L. Tolman, Are Groundwater Vulnerability Classification Systems Workable? Proceedings of the Eastern Regional Ground Water Focus Conference, Kitchener Ontario. National Water Well Association.

1989, with T.L. Potter, Groundwater Sampling Manual for Underground Storage Tank Sites: Maine Department of Environmental Protection.

1988, How to Sample Ground Water and Soils, A Manual for the Back Pocket: National Water Well Association. (a NGWA best-seller, subsequently translated into Swedish).

1988, Oil Spills in Fractured Bedrock and Other Aquifers: Monitoring and Remediation: Proceedings of the Second Annual Underground Storage Tank Management and Hydrocarbon Contamination Cleanup Conference, Resource Education Institute, Northboro, Massachusetts, 11 pp.

1987, Comparative Vulnerability to Oil Spills of Fractured Bedrock versus Sand and Gravel Aquifers: Proceedings of the Fourth Eastern Regional Ground Water Focus Conference, Burlington, VT, National Water Well Association, p. 773-783.

1987, Oxygenates as Ground Water Contaminants: Proceedings of a Conference on Alcohols and Octane: Renewable Fuels Association, San Antonio, TX, 12 p.

1986, with Marcel Moreau, and Jerry D. Lowry, Methyl Tertiary Butyl Ether (MTBE) as a Groundwater Contaminant: Proceedings of the Conference on Petroleum Hydrocarbons and Organic Chemicals in Ground Water, National Water Well Association/American Petroleum Institute, p. 227-238.

1986, with John S. Williams, and Marcel Moreau, Groundwater Contamination; New England Interstate Geological Conference Field Trip Guide, trip B-6. 

1986, with Esther Lacognata, Towards a Groundwater Classification System for Maine: Proceedings of the Third Eastern Regional Groundwater Issues Conference, National Water Well Association, p. 16-31.

1986, Threats to Groundwater in Maine: Maine Departments of Environmental Protection and Human Services (a uniquely informative wall chart). 

1984, The ABC's of Risk Assessment: Maine EnvironNews, Vol. 10, #10.

1983, The Water Beneath Our Feet: Habitat, Vol. 1, #2.

1983, Who Is To Blame?: Maine EnvironNews, Vol. 10, #5.

1983, Aquifers Explained: Maine EnvironNews, Vol.#s 8 and 9.

John Brooks, Ph.D., P.G.

Vice President, Senior Project Manager, and Senior Scientist

An integral EGGI team member since 1990, John Brooks is a recognized industry leader in the delineation of groundwater resources using glacial mapping technology, geophysical survey techniques, and advanced hydrogeological site characterizations. Dr. Brooks has a long track record of conducting and interpreting geophysical investigations to successfully identify favorable drilling targets for the development of high yield wells. He has supervised or been involved in over 850 groundwater exploration, development, and protection projects at EGGI, with a focus on both fractured bedrock and unconsolidated aquifers.

Dr. Brooks’ experience and responsibilities include: senior project management and senior technical advisor; groundwater exploration and development in both fractured bedrock and unconsolidated aquifers; supervision of the geophysical department; development of geophysical protocols for groundwater exploration and development; modeling of geophysical data; mapping and interpretation of bedrock lithology and structural discontinuities; mapping and interpretation of glacial geomorphology; design, installation, and development of monitoring and production wells; organization, design, and management of aquifer testing programs; and aquifer and well field analysis.

His analytical and technical skills include the collection and analysis of magnetic data, electromagnetic data, resistivity data, single and multi-channel seismic refraction, ground penetrating radar and side scan sonar data; and field geology/structural analysis. His skills also include the use of X-ray fluorescence, instrumental neutron activation, solid source mass-spectrometry, and electron and scanning microprobe.

Dr. Brooks holds a Ph.D. in Geophysics from the University of New Hampshire.

Selected Publications, Presentations and Honors >

Hussey II, A.M. and Brooks, J.A., 2014, Bedrock Geology of the York Harbor Quadrangle, Maine, Scale 1:24,000, Maine Geologic Survey open file map.

Hussey II, A.M. and Brooks, J.A., 2014, Bedrock Geology of the York Beach Quadrangle, Maine, Scale 1:24,000, Maine Geologic Survey open file map.

Tinkham, D.J., Brooks, J.A., and Marts, J.M., 2014, Application of Long-term Water Level Monitoring to Assess Sustainability, Presentation at the New Hampshire Water & Watershed Conference.

Brooks, J.A. and Tinkham, D.J., Bedrock and Surficial Geology of the Lakes Region of Central New Hampshire, Geological Society of New Hampshire 2013 Summer Field Trip Guide. 

Tinkham, D.J., Brooks, J.A., and Wingsted, M.B., 2013, Surficial Geology of the Plymouth, 7.5 minute Quadrangle, Grafton County, New Hampshire, scale 1:24,000, NH Geologic Surficial Geologic Map Open-File Series GEO-084-02400-SMOF.

Brooks, J.A., 2013, Proto-Winnipesaukee and Squam: Deglaciation of the Winnipesaukee Basin, New Hampshire Geological Survey’s Annual Geologic Mapping Workshop 2013, April 16, 2013, NHDES, Concord, New Hampshire.

Brooks, J.A. and Emery, J.M., 2011, Evaluating Recharge Sources for Bedrock and Sand & Gravel Production Wells, The 2011 New Hampshire Water and Watershed Conference, March 25-26, 2011, Plymouth State University, Plymouth, New Hampshire.

Brooks, J.A., 2010, Water Resources Management with the Aid of Modeling. Presentation given at the New Hampshire Water Works Association Operators' Training Session, "Groundwater Issues," NHDES Auditorium, Concord, New Hampshire.

Tinkham, D.J., and Brooks, J.A. 2010, Surficial Geology of the Holderness, 7.5 minute Quadrangle, Belknap, Grafton, and Carroll Counties, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Brooks, J.A., and Emery, J.M., 2010, NH Water Works Association, April Technical Meeting, Presentation: Water Supply Development from Bedrock Aquifers in Newmarket, New Hampshire.

Brooks, J.A. and Tinkham, D.J., 2009, Surficial Geology of the Bristol, 7.5 minute Quadrangle, Grafton County, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Brooks, J.A. and Tinkham, D.J., 2008, Surficial Geology of the Wolfeboro, 7.5 minute Quadrangle, Carroll County, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Brooks, J.A. and Tinkham, D.J., 2007, Surficial Geology of the Great East Lake, 7.5 minute Quadrangle, Carroll County, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Brooks, J.A. and Tinkham, D.J., 2007, Insights into the Wisconsin Deglaciation of the Lakes Region, New Hampshire. Poster presentation at the 42nd Annual Meeting of the Northeastern Section of the Geological Society of America, University of New Hampshire, Durham, New Hampshire.

Tinkham, D.J., Foster, P.J., Emery, J.M., and Brooks, J.A., 2007, Implications for Aquifer Analysis from Discrete, Anisotropic Water Level Impacts Observed During Pumping Tests Performed in Fractured-Bedrock Aquifers. Oral presentation at the 42nd Annual Meeting of the Northeastern Section of the Geological Society of America, University of New Hampshire, Durham, New Hampshire. 

Hardcastle, K.C., Brooks, J.A., and Tinkham, D.J., 2007, DEM Analysis for Surficial Mapping in the Lakes Region, New Hampshire. Poster presentation at the 42nd Annual Meeting of the Northeastern Section of the Geological Society of America, University of New Hampshire, Durham, New Hampshire.

Foster, Peter J., Hardcastle Ken C., Brooks, John A., and Emery, James M., 2006, Groundwater Exploration and Development in Sedimentary and Igneous Rocks of the Mesozoic Culpeper Basin, Fauquier County, Virginia – A Case Study; Geo. Soc. Am., Abs. and Prog., v. 38, no. 3, p. 12.

Brooks, J.A. and Tinkham, D.J., 2006, Surficial Geology of the Pittsfield, 7.5 minute Quadrangle, Merrimack County, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Guest Speaker, “The Development of Additional Resources at the Penacook-Boscawen Water Precinct County Farm Site,” NH Water Works Association Meeting, September 2005.

Brooks, J.A. and Tinkham, D.J., 2005, Surficial Geology of the Great East Lake, 7.5 minute Quadrangle, Carroll and Strafford Counties, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Brooks, J.A. and Tinkham, D.J., 2004, Surficial Geology of the West Alton, 7.5 minute Quadrangle, Belknap County, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Brooks, J.A., 2004, Surficial Geology of the Northwood 7.5 minute Quadrangle, Belknap County, New Hampshire, scale 1:24,000, NH Geologic Survey open file report. 

Tinkham, D.J. and Brooks, J.A., 2003, Surficial Geology of the Northfield, 7.5 minute Quadrangle, Merrimack County, New Hampshire, scale 1:24,000, NH Geologic Survey open file report. 

Brooks, J.A., Hardcastle, K.C., Allen, R.P., Foster, P.J., Howard, P.E., 2002, Geophysical Investigation of Groundwater Contamination, Case Study of the Laurel Valley Landfill, Culpeper, Virginia, EEGS Proceedings of the Symposium on the Application of Geophysics to Environmental and Engineering Problems.

Brooks, J.A. and Tinkham, D.J., 2002, Surficial Geology of the Laconia 7.5 minute Quadrangle, New Hampshire, NH Geologic Survey open file.

Brooks, J.A. and Emery, J.M., 1999, Exploration of Groundwater Resources in Bedrock Aquifers using Surface Geophysical Methods, Geol. Soc. Am., Abs. and Prog., v. 31, no. 3, p. 7.

Brooks, J.A. and Hardcastle, K.C., 1996, Lineaments, Fracture-Supported Lineaments and Yields of Existing Wells in the Valley Ridge at Northern Virginia, Geo. Soc. Am., Abs. and Prog., v. 28, no. 3, p. 42.

Brooks, J.A. and Hardcastle, K.C., 1992, Magnetics and the Detection of Sub-Surface Water-Bearing Zones, Culpeper Basin, Virginia, Geol. Soc. Am., Abs. and Prog., v. 24, no. 2, p. 5.

Brooks, J.A. and Gust, D.A., 1991, Petrogenesis of Mesozoic Felsic Complexes in Southern Maine, Geol. Soc. Am., Abs. and Prog., 23(1);11.

Hardcastle, K.C., Brooks, J.A., Emery, J.M., and Tinkham, D.J., 1991, Remote Sensing of Groundwater-Controlling, Bedrock Fracture Systems: Photolineament and Magnetometer Analyses in the Culpeper Basin, Virginia, Geol. Soc. Am., Abs. and Prog. 23(1);41.

Brooks, J.A., and Bothner, W.A., 1989, Late(?) Alleghanian Dextral Transpression and Terrane Accretion within Coastal New England and Western Gulf of Maine as Interpreted from Regional Aeromagnetic and Gravity Maps. AGU Eos Trans 70(15);462.

Brooks, J.A., and Bothner, W.A., 1989, Late(?) Alleghanian Dextral Transpression and Terrane Accretion within Coastal New England and Western Gulf of Maine as Interpreted from Regional Aeromagnetic and Gravity Maps. AGU Eos Trans 70(15);462.

Brooks, J.A., Gust, D.A., and Hussey, A.M., 1989, Geology and Geochemistry of the Mt. Agamenticus Complex, York, Maine. In Guidebook for Field Trips in Southern and West-Central Maine. NEIGC 81st Annual Meeting, pp 1-24.

Bothner, W.A., Brooks, J.A., and Eusden, J.D., 1988, Geology and Geophysics of the Messabesic, Merrimack, and Rye "Zones" in central coastal New England. Geol. Soc. Am: Programs with Abstracts 20(1); 9.

Daniel Tinkham, M.S., P.G.

Vice President, Senior Project Manager, and Senior Scientist

An integral EGGI team member since 1989, Dan Tinkham is a highly experienced hydrogeologist expert in groundwater protection, recharge, and modeling, as well as aquifer safe yield calculations. He has managed or been involved in over 850 groundwater resource investigation and supply projects at EGGI.

Dan has a particularly advanced understanding of: organization, design, and management of aquifer testing and groundwater monitoring programs; aquifer and well field analysis; calculation of recharge rates to groundwater systems; application of analytical and numerical groundwater models, including USGS-3D (MODFLOW); volumetric water budgets for watersheds; mapping and interpretation of glacial geomorphology; implementation of groundwater quality monitoring programs; design, installation, and development of monitoring and production wells; and groundwater exploration and development in both fractured bedrock and unconsolidated aquifers.

Dan holds an M.S. in Hydrogeology from the University of New Hampshire.

Selected Publications, Presentations and Honors >

Tinkham, D.J., Brooks, J.A., and Marts, J.M., 2014, Application of Long-term Water Level Monitoring to Assess Sustainability, Presentation at the New Hampshire Water & Watershed Conference.

Emery, J.M. Tinkham, D.J. and Foster, P.J., 2013, Delineation of a Wellhead Protection Area around the Lyndhurst Well, Augusta County, Virginia, presented at the 22nd Annual Maryland Ground Water Symposium, September 26, 2013.

Brooks, J.A. and Tinkham, D.J., Bedrock and Surficial Geology of the Lakes Region of Central New Hampshire, Geological Society of New Hampshire 2013 Summer Field Trip Guide.

Tinkham, D.J., Brooks, J.A., and Wingsted, M.B., 2013, Surficial Geology of the Plymouth, 7.5 minute Quadrangle, Grafton County, New Hampshire, scale 1:24,000, NH Geologic Surficial Geologic Map Open-File Series GEO-084-02400-SMOF. 

Tinkham, D.J., 2013, Projection of Glacial Lake Franklin into the Ashland Quadrangle, New Hampshire Geological Survey’s Annual Geologic Mapping Workshop 2013, April 16, 2013, NHDES, Concord, New Hampshire.

Tinkham, D.J. and Brooks, J.A., 2012, Surficial Geology of the Ashland 7.5 minute Quadrangle, Belknap and Grafton Counties, New Hampshire, scale 1:24,000, NH Geologic Survey Surficial Geologic Map Open-File Series GEO-096-02400-SMOF.

Brooks, J.A. and Tinkham, D.J., 2012, Surficial Geology of the Center Harbor 7.5 minute Quadrangle, Belknap and Carroll Counties, New Hampshire, scale 1:24,000, NH Geologic Survey Surficial Geologic Map Open-File Series GEO-098-02400-SMOF.

Tinkham, D.J., and Brooks, J.A. 2010, Surficial Geology of the Holderness, 7.5 minute Quadrangle, Belknap, Grafton, and Carroll Counties, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Brooks, J.A. and Tinkham, D.J., 2009, Surficial Geology of the Bristol, 7.5 minute Quadrangle, Grafton County, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Brooks, J.A. and Tinkham, D.J., 2008, Surficial Geology of the Wolfeboro, 7.5 minute Quadrangle, Carroll County, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Marts, Jeffrey M. and Tinkham, D.J., 2007, Mitigating the Effects of Elevated Chloride Concentrations in a Valley-fill Aquifer. Oral presentation given at the Meeting of the New England Water Well Association October 2006. Published in Journal NEWWA, December 2007, p. 286-294.

Tinkham, D.J., Foster, P.J., Emery, J.M., and Brooks, J.A., 2007, Implications for Aquifer Analysis from Discrete, Anisotropic Water Level Impacts Observed During Pumping Tests Performed in Fractured-Bedrock Aquifers. Oral presentation at the 42nd Annual Meeting of the Northeastern Section of the Geological Society of America, University of New Hampshire, Durham, New Hampshire.

Hardcastle, K.C., Brooks, J.A., and Tinkham, D.J., 2007, DEM Analysis for Surficial Mapping in the Lakes Region, New Hampshire. Poster presentation at the 42nd Annual Meeting of the Northeastern Section of the Geological Society of America, University of New Hampshire, Durham, New Hampshire.

Brooks, J.A. and Tinkham, D.J., 2007, Insights into the Wisconsin Deglaciation of the Lakes Region, New Hampshire. Poster presentation at the 42nd Annual Meeting of the Northeastern Section of the Geological Society of America, University of New Hampshire, Durham, New Hampshire.

Brooks, J.A. and Tinkham, D.J., 2007, Surficial Geology of the East Great Lake, 7.5 minute Quadrangle, Carroll County, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Brooks, J.A. and Tinkham, D.J., 2006, Surficial Geology of the Pittsfield, 7.5 minute Quadrangle, Merrimack County, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Tinkham, D.J., 2005, Surficial Geology of the Milton, 7.5 minute Quadrangle, Strafford County, New Hampshire, scale 1:24,000, NH Geologic Survey open file report. 

Tinkham, D.J. and Brooks, J.A., 2004, Surficial Geology of the West Alton, 7.5 minute Quadrangle, Belknap County, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Brooks, J.A., 2004, Surficial Geology of the Northwood, 7.5 minute Quadrangle, Strafford and Rockingham Counties, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Tinkham, D.J. and Brooks, J.A., 2003, Surficial Geology of the Northfield, 7.5 minute Quadrangle, Merrimack County, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Brooks, J.A. and Tinkham, D.J., 2002, Surficial Geology of the Laconia, 7.5 minute Quadrangle, Belknap County, New Hampshire, scale 1:24,000, NH Geologic Survey open file report.

Emery, J.M., and Tinkham, D.J., 1992, “Groundwater Exploration and Development in Fractured Bedrock in the Piedmont,” American Water Resources Association -- National Symposium on “Future Availability of Groundwater Resources”. 

Hardcastle, K.C., Brooks, J.A., Emery, J.M., and Tinkham, D.J., 1991, Remote Sensing of Groundwater-Controlling, Bedrock Fracture Systems: Photolineament and Magnetometer Analyses in the Culpeper Basin, Virginia, Geol. Soc. Am., Abs. and Prog.,v. 23, no. 1, p. 41.

Tinkham, Daniel J., Taylor, Keith R., Olafsen-Lackey, Susan, “Influence of Geomorphic Variables on the Yield of Bedrock Wells in the Northern Virginia Piedmont”, presented at “A Conference on Groundwater in the Piedmont of the Eastern U.S.”, Charlotte, NC (October 1989).

Selected speaker, Short Course on Ground Water Protection, Antioch College, Keene, NH, March, 1992.

Selected guest speaker on river dynamics at a meeting of the Pemigewasset Wild and Scenic River Study Committee, February, 1992.

Ken Hardcastle, Ph.D., P.G.

Senior Project Manager and Senior Scientist

An integral EGGI team member since 1989, Ken Hardcastle is an experienced senior structural geologist who has focused his technical career on groundwater exploration and development. He is a recognized leading expert in utilizing satellite images and aerial photography in conjunction with detailed geologic mapping. Dr. Hardcastle’s contribution to the delineation of favorable groundwater development sites has been instrumental in identifying high yield wells suitable for use as public supplies and/or commercial purposes. He has supervised or participated in over 800 groundwater investigations throughout the Eastern United States at EGGI.

Dr. Hardcastle has an advanced understanding of: Senior Project Management; Regional (large-scale) groundwater exploration and development projects; remote sensing analysis, imagery manipulation and enhancement; geologic mapping with emphasis on brittle crust and fluid flow evaluations; mapping and interpretation of bedrock structural features; geophysical surveys (collection and analyses of data); development of software for the analysis of geophysical, lineament, fracture, and brittle fault data; design of protocols/templates for use with AutoCad and GIS software; database design and integration with GIS; and computer network design, management, and utilization.

Dr. Hardcastle holds a Ph.D. in Structural Geology from the University of Massachusetts, Amherst and an MSc in Geology.

Selected Publications, Presentations and Honors >

Foster, P.J., Emery, J.M., and Hardcastle, K.C., 2012, The Impacts of the Earthquake that Struck Near Mineral Virginia on Groundwater Resources in Northern Virginia. Oral presentation at the 61st Annual Meeting of the Southeastern Section of the Geological Society of America, Asheville, North Carolina.

Emery, J.M. and Hardcastle, K.C., 2011, Abstract, The Impacts on Groundwater Resources in Northern Virginia that were caused by the recent 5.8-Magnitude Earthquake in Mineral, Virginia.

Hardcastle, K.C., Brooks, J.A., and Tinkham, D.J., 2007, DEM Analysis for Surficial Mapping in the Lakes Region, New Hampshire. Poster presentation at the 42nd Annual Meeting of the Northeastern Section of the Geological Society of America, University of New Hampshire, Durham, New Hampshire.

Foster, Peter J., Hardcastle Ken C., Brooks, John A., and Emery, James M., 2006, Groundwater Exploration and Development in Sedimentary and Igneous Rocks of the Mesozoic Culpeper Basin, Fauquier County, Virginia – A Case Study; Geo. Soc. Am., Abs. and Prog., v. 38, no. 3, p. 12.

Wise, D.U., Mabee, S.B., and Hardcastle, K.C., 2003, Preliminary geology and assessment of groundwater potential at Cresta de Sacramento, Palpa, Peru, presented to the Mayor of Cresta de Sacramento, Peru.

Brooks, J.A., Hardcastle, K.C., Allen, R.P., Foster, P.J., Howard, P.E., 2002, Geophysical Investigation of Groundwater Contamination, Case Study of the Laurel Valley Landfill, Culpeper, Virginia, EEGS Proceedings of the Symposium on the Application of Geophysics to Environmental and Engineering Problems.

Mabee, S.B., Curry, P.J., and Hardcastle, K.C., 2002, Correlation of Lineaments to Groundwater Inflows in a Bedrock Tunnel, Ground Water, v. 40, no. 1, p. 37-43.

Williams, K.W., Mabee, S.B, Curry, P.J., and Hardcastle, K.C., 2001, Surface vs. Subsurface Fracture Characteristics along Cross Strike Transect in Eastern Massachusetts, GSA Abstracts with Programs, vol. 33, no. 6.

Mabee, S.B, Curry, P.J., and Hardcastle, K.C., 2001, Correlation of Lineaments to Ground Water Inflows in the MWRA Tunnel, GSA Abstract with Programs, vol. 33, no. 6.

Kratt, C., and Hardcastle, K.C., 2001, Mapping Reproducible Lineaments using Digital Elevation Models, GSA Abstracts with Programs, vol. 33, no. 6.

Williams, K.W., Curry, P.J., Mabee, S.B., and Hardcastle, K.C., 1999, Surface and Subsurface Fracture Characterization and Correlation Along a Cross-strike Transect in Eastern Massachusetts, American Geophysical Union, abstract H51B-04.

Curry, P.J., Hardcastle, K.C., Mabee, S.B, and Williams, K.W., 1999, Factors Influencing Groundwater Inflows in a Newly Constructed Cross-Strike Tunnel, Eastern Massachusetts: Lineaments and Subsurface Structures, GSA Abstracts with Programs, vol. 31, no. 7.

Hardcastle, K.C., Curry, P.J., Williams, K.W., and Mabee, S.B., 1999, Factors Influencing Groundwater Inflows in a Newly Constructed Cross-Strike Tunnel, Eastern Massachusetts: Fracture-Supported Coincident Lineaments and Subsurface Structures, GSA Abstracts with Programs, vol. 31, no. 7.

Mabee, S.B., Williams, K.W., Curry, P.J., and Hardcastle, K.C., 1999, Factors Influencing Groundwater Inflows in a Newly Constructed Cross-Strike Tunnel, Eastern Massachusetts: Surface vs. Subsurface Fracture Characteristics, GSA Abstracts with Programs, vol. 31, no. 7.

Williams, K.W., Mabee, S.B., Hardcastle, K.C., and Curry, P.J., 1999, Factors Influencing Groundwater Inflows in a Newly Constructed Cross-Strike Tunnel, Eastern Massachusetts: 4. Occurrence and Characterization of Groundwater Inflows, GSA Abstracts with Programs, vol. 31, no. 7.

Curry, P., Williams, K., Mabee, S., and Hardcastle, K.C., 1998, Comparison Lineaments with Bedrock Structures along a Cross-Strike Transect, Eastern Mass., Geol. Soc. of Amer., Abst. and Prog.

Hardcastle, K.C., 1998, Lineament Fabric of Tenants Harbor, Maine, Northeast Section Geol. Soc. Am., Abs. and Prog., v. 30, no. 1.

Brady, J.J., and Hardcastle, K.C., 1998, Fracture Fabric of Tenants Harbor, Maine, Northeast Section Geol. Soc. Am., Abs. and Prog., v. 30, no. 1.

Mabee, S.B., and Hardcastle, K.C., 1997, Analyzing Outcrop-Scale Fracture Features to Supplement Investigations of Bedrock Aquifers, Hydrogeology Journal, v. 5, no. 4, pp. 21-36.

Brooks, J.A. and Hardcastle, K.C., 1996, Lineaments, Fracture-Supported Lineaments and Yields of Existing Wells in the Valley Ridge at Northern Virginia, Geo. Soc. Am., Abs. and Prog., v. 28, no. 3, p. 42.

Hardcastle, K.C., 1996, Fracture Mapping with Remotely-Sensed Lineaments – the 60% Factor, Northeast Section Geol. Soc. Am., v. 28, no. 3, p. 62.

Mabee, S.B. and Hardcastle, K.C., 1996, Fracture Characterization – Valuable Inputs for Modeling Groundwater Flow in Fractured Bedrock, Northeast Section Geol. Soc. Am., Abs. and Prog., v. 28, no. 3, p. 77.

Mabee, S.B., and Hardcastle, K.C., 1995, Use of Outcrop-based Observations as Indicators of Subsurface Fluid Flow in Fractured Grandiorite, Raymond, California, Geol. Soc. Am., Abs. and Prog., v. 27, no. 6, p. A-105.

Mabee, S.B., Hardcastle, K.C., and Wise, D.U., 1994, A Method of Collecting and Analyzing Lineaments for Regional-Scale Fractured-Bedrock Aquifer Studies, Ground Water, v. 21, no. 6, p. 884-894.

Hardcastle, K.C., 1995, Photolineament Factor: A New Computer-Aided Method for Remotely Sensing the Degree to Which Bedrock is Fractured, Photogrammetric Engineering and Remote Sensing, v. 61, no. 6, pp. 739-747.

Chair at Symposium on Practical Methods for Evaluation of Groundwater In Fractured Bedrock at the Northeast Section Meeting of the Geological Society of America, 1993.

Hardcastle, 1993, Fracture Fabric of the Mesozoic Culpeper Basin and Adjacent, Pre-Triassic Crystalline Rocks, invited to the Northeast Section Geol. Soc. Am., Abs. and Prog., v. 25, no. 2, pp. 21-22.

Hardcastle, K.C., 1992, Correlation of Lineaments and Fracture Fabric in the Piedmont:

Implications for the Study of Fractured Bedrock Aquifers, Geol. Soc. Am., Abs. and Prog., v. 24, no. 2, p. 19.

Brooks, J.A. and Hardcastle, K.C., 1992, Magnetics and the Detection of Sub-Surface Water-Bearing Zones, Culpeper Basin, Virginia, Geol. Soc. Am., Abs. and Prog., v. 24, no. 2, p. 5.

Wise, D.U. and Hardcastle, K.C., 1992, Field Evidence for Paleo-Seismic Patterns Across New England, invited to the American Geophysical Union, v. 73, no. 14, p. 306.

Hardcastle, K.C. and Hills, L.S., 1991, BRUTE3 & SELECT: QuickBASIC 4 programs for determination of stress tensor configurations and separation of heterogeneous populations of fault-slip data, Computers & Geoscience, v. 17, no. 1, 23-43.

Hardcastle, K.C., Brooks, J.A., Emery, J.M., and Tinkham, D.J., 1991, Remote Sensing of Groundwater-Controlling, Bedrock Fracture Systems: Photolineament and Magnetometer Analyses in the Culpeper Basin, Virginia, Geol. Soc. Am., Abs. and Prog., v. 23, no. 1, p. 41.

Hardcastle, K.C., Emery, J.M., Tinkham, D.J., and Brooks, J.A., 1991, Photolineament Factor Analysis: A new computerized method of remotely assessing the degree to which bedrock is fractured, NWWA Conf. Innov. Ground Water Tech. of the 90’s.

Mabee, S.B., Hardcastle, K.C., and Wise, D.U., 1990, Correlation of lineaments and bedrock fracture fabric: Implications for regional fractured-bedrock aquifer studies, preliminary results from Georgetown, Maine, Proc. FOCUS Conf. on Eastern Reg. Ground Water Issues, no. 3, 283-297.

Hardcastle, K.C. and Albaugh, D.S., 1990, Structural Aspects of a fault-related, paleo-hydrothermal system in the Lakes Region, central New Hampshire: Timing of a regional Mesozoic paleo-stress change?, Tectonics, v. 9, no. 4, 623-639.

Hardcastle, K.C., 1989, Possible Paleo-stress configurations derived from fault-slip data in eastern Vermont and western New Hampshire, Tectonics, v. 8, 265-284.

Hardcastle, K.C., Fleischmann, K.F., and Wise, D.U., 1989, Evolution of brittle deformation in New England: Evidence from post-orogenic veins and fracture-fillings, Geol. Soc. Am., Abs. and Prog., v. 22.

Mabee, S.B. and Hardcastle, K.C., 1989, Ground truth: Bedrock fracture fabric, lineaments and bedrock-well yield, Georgetown, Maine, Geol. Soc. Am., Abs. and Prog., v 22.

Albaugh, D.S. and Hardcastle, 1989, A correlation between fracture fabrics, faults, and seismicity in the central New Hampshire Lakes Region, invited for the Neotectonics in New England Symposium, Northeast Section Geol. Soc. Am., Abs. and Prog., v. 21, 1.

Hanson, R.E., Wilson, T.J., Brueckner, H.K., Onstott, T.C., Wardlaw, M.S., Johns, C.C., and Hardcastle, K.C., 1988, Reconnaissance geochronology, tectonothermal evolution, and regional significance of the Middle Proterozoic Choma-Kalomo Block, southern Zambia, J. Precambrian Res., v. 42, 39-62.

Wise, D.U. and Hardcastle, K.C., 1988, Regional paleo-stress tensors from slickensided surfaces across central New England, Geol. Soc., Am., Abs. and Prog., v. 20.

Jeff Marts, B.S., P.G.

Senior Project Manager

A key member of EGGI’s groundwater exploration and development team since 1996, Jeff Marts has focused his entire professional career on the assessment of bedrock aquifers along the U.S. Eastern Seaboard. To date, he has worked on over 800 EGGI groundwater investigations.

Jeff’s experience and responsibilities include: project management; remote sensing analyses; bedrock fracture fabric analyses; assessment of contaminant threats to groundwater quality; bedrock geologic mapping; karst spring source-water protection analysis; sodium chloride loading studies and salt-use reduction strategy development; planning and performance of pumping tests; performance of landfill gas remediation tests; drilling and installing monitoring wells and water supply production wells; use of AutoCAD and GIS for all of the above; geophysical surveys (collection and analyses of data); site investigations and reports; site health & safety plans; landfill gas extraction well installation; evaluation of spill prevention plans; creation of groundwater protection ordinance and wellhead protection plans; surface water stream gaging; groundwater resource development in Coastal Plain aquifers; monitoring and mining of rock blasting programs; and the development and execution of groundwater sampling plans.

Jeff holds a B.Sc. in Geology from the University of New Hampshire in Durham, NH.

Selected Publications, Presentations and Honors >

Tinkham, D.J., Brooks, J.A., and Marts, J.M., 2014, Application of Long-term Water Level Monitoring to Assess Sustainability, Presentation at the New Hampshire Water & Watershed Conference.

Marts, J.M., Tinkham, D.J., 2013, A Mass Balance Approach to Evaluating Salt Loading of Stratified Drift Aquifer, Merrimack, NH. Poster presentation at the 48th Annual Meeting of NE GSA, Bretton Woods, NH.

Marts, J.M., 2013, Making Strides to Reduce Salt Use in Wellhead Protection Areas in Merrimack, NH. Poster presentation at the 2013 Groundwater Foundation National Conference.

Marts, J.M., 2012, Reducing Sodium and Chloride Loading within Groundwater Protection Areas for Merrimack’s Public Supply Production Wells. Presentation at Merrimack Village District Office, Merrimack, New Hampshire.

Marts, J.M., 2010, Case Study: Elevated Chloride in a Valley-Fill Aquifer: Monitoring and Proposed Mitigation. Oral presentation given at A Road Less Salted – Water Quality and Salt Reduction Seminar, Hugh Greg Coastal Conservation Center, Greenland, New Hampshire.

Marts, J.M. and Emery, J.M., 2007, High Resolution Monitoring of Specific Conductivity as a Proxy for Chloride in a Valley-Fill Aquifer in Ashland, New Hampshire. Poster presentation at the 42nd Annual Meeting of the Northeastern Section of the Geological Society of America, University of New Hampshire, Durham, New Hampshire.

Marts, Jeffrey M. and Tinkham, D.J., 2007, Mitigating the Effects of Elevated Chloride Concentrations in a Valley-fill Aquifer. Oral presentation given at the Meeting of the New England Water Well Association, October 2006. Published in Journal NEWWA, December 2007, p. 286-294.

Mark Wingsted, M.S., P.G.

Senior Project Manager

A key member of EGGI’s groundwater exploration and development team since 1997, Mark Wingsted has worked extensively throughout the U.S. Eastern Seaboard throughout this period. Mark is a highly experienced geologist/hydrogeologist who has focused his technical career in the exploration and development of groundwater resources in fractured crystalline bedrock. He has applied his skills in conducting and interpreting geological and geophysical investigations to select favorable drilling targets for the development of high yield wells. Mark has worked on over 700 EGGI groundwater investigations.

Mark’s responsibilities at EGGI include: project management; geologic mapping; remote sensing analyses; drilling and logging monitoring wells and water supply production wells; geophysical surveys (collection and analyses of electrical resistivity, magnetic, and electromagnetic data); conducting pumping tests, carrying out detailed site investigations and preparing hydrogeologic reports; using AutoCAD and GIS for all of the above

Mark holds an M.S. in Geology from the University of Massachusetts, Amherst.

Selected Publications, Presentations and Honors >

Tinkham, D.J., Brooks, J.A., and Wingsted, M.B., 2013, Surficial Geology of the Plymouth, 7.5 minute Quadrangle, Grafton County, New Hampshire, scale 1:24,000, NH Geologic Surficial Geologic Map Open-File Series GEO-084-02400-SMOF.

Peter Foster, M.S.

Senior Project Manager

A key member of EGGI’s groundwater exploration and development team since 2000, Peter Foster is a highly experienced hydrogeologist in groundwater protection, recharge, and groundwater quality assessments, as well as aquifer safe yield calculations. He has focused his professional career and graduate studies on groundwater investigations in New England and along the U.S. Eastern Seaboard. Peter has managed or been involved in over 450 EGGI groundwater resource investigation and supply projects.

Peter’s experience and responsibilities include: project management; pumping test design and analysis; geologic logging of water supply production wells and environmental monitoring wells; assessment of contaminant threats to groundwater quality; use of AutoCad and GIS for all of the above; geophysical surveys (collection and analyses of data); and on-site investigations and preparation of hydrogeologic reports.

Peter holds an MSc in Geology from the University of New Hampshire, Durham.

Selected Publications, Presentations and Honors >

Tinkham, D.J. and Emery, J.M., and Foster, P 2013, Delineation of a Wellhead Protection Area around the Lyndhurst Well, Augusta County, Virginia, presented at the 22nd Annual Maryland Ground Water Symposium, September 26, 2013.

Mentor for the John Mann Mentors in Applied Hydrogeology Program – The Geological Society of America, April 2012.

Foster, P.J., Emery, J.M., and Hardcastle, K.C., 2012, The Impacts of the Earthquake that Struck Near Mineral, Virginia on Groundwater Resources in Northern Virginia. Presentation at the 61st Annual Meeting of the Southeastern Section of the Geological Society of America, Asheville, North Carolina.

Tinkham, D.J., Foster, P.J., Emery, J.M., and Brooks, J.A., 2007, Implications for Aquifer Analyses from Discrete, Anisotropic Water Level Impacts Observed During Pumping Tests Performed in Fractured-Bedrock Aquifers. Oral presentation at the 42nd Annual Meeting of the Northeastern Section of the Geological Society of America, University of New Hampshire, Durham, New Hampshire.

Foster, Peter J., Hardcastle Ken C., Brooks, John A., and Emery, James M., 2006, Groundwater Exploration and Development in Sedimentary and Igneous Rocks of the Mesozoic Culpeper Basin, Fauquier County, Virginia – A Case Study; Geo. Soc. Am., Abs. and Prog., v. 38, no. 3, p. 12.

Ryan Allen, B.S.

Field Supervisor

A key member of EGGI’s groundwater exploration and development team since 2000, Ryan Allen has focused his professional career on the assessment of both bedrock and unconsolidated aquifers along the U.S. Eastern Seaboard. Ryan has participated in or managed over 550 EGGI groundwater supply projects.

Ryan is an experienced geologist and chief operations manager for conducting geophysical surveys. He has a comprehensive understanding of: geologic mapping; remote sensing analysis; collection and modeling of electrical resistivity, magnetic, and electromagnetic data; drilling and logging of monitoring wells; drilling and logging of water supply production wells; use of AutoCAD and GIS for all of the above; design and construction of Microsoft Excel templates.

Michael O'Brien, B.S.

Field Supervisor

A key member of EGGI’s groundwater exploration and development team since 2005, Michael O’Brien has focused his professional career on the assessment of both bedrock and unconsolidated aquifers along the U.S. Eastern Seaboard. Michael has participated in over 400 EGGI groundwater supply projects.

Michael is an experienced geologist and project field manager of groundwater resource projects who has a thorough understanding of: geologic mapping; planning and performing pumping tests to assess aquifer/well yield and quality; remote sensing analysis; geophysical surveys (collection and analyses of electrical resistivity, magnetic, and electromagnetic data); drilling and logging of monitoring wells; drilling and logging of water supply production wells; surface water stream gauging; use of AutoCAD and GIS for all of the above; use of Visual Basic for Applications script for design and construction of Microsoft Excess and Access templates

Michael holds a B.S. in Geology from the University of New Hampshire, Durham.