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Daniel Deeds

Daniel Deeds is Chief, Bridgeville Hydrologic Studies, with the Pennsylvania Water Science Center.

Dan has experience in analytical development and detection of ultra-trace concentrations of contaminants in air, surface water and groundwater. He worked for several years in the consulting industry on contaminant plumes in soils and groundwater before returning to the federal government as a water quality policy specialist and the lead of the Environmental Monitoring group for the U.S. Bureau of Reclamation. While there he served as lead researcher on projects investigating wildfire and dredging water quality impacts and detection of endangered species and harmful algal blooms. Currently he leads the Hydrologic Studies Unit at the Bridgeville (Pittsburgh) Field Office. 
 

Professional Experience

  • U.S. Bureau of Reclamation, 2019–2023

  • Independent Environmental Consultant, 2017–2019

  • Independent Contractor, 2016–2018

  • McGill University, Visiting Scholar, 2014

  • U.S. Geological Survey, Research Hydrologist, 2011–2013

  • McGill University, Postdoctoral Researcher, 2008–2011
     

Education and Certifications

  • PhD, University of California San Diego, Earth Science, 2001–2008 

  • Bachelor of Sciences, University of California Berkeley, Chemistry, 1997–2001
     

Science and Products

Tectonic activity as a significant source of crustal tetrafluoromethane emissions to the atmosphere: observations in groundwaters along the San Andreas Fault

Tetrafluoromethane (CF4) concentrations were measured in 14 groundwater samples from the Cuyama Valley, Mil Potrero and Cuddy Valley aquifers along the Big Bend section of the San Andreas Fault System (SAFS) in California to assess whether tectonic activity in this region is a significant source of crustal CF4 to the atmosphere. Dissolved CF4 concentrations in all groundwater samples but one were
Authors
Daniel A. Deeds, Justin T. Kulongoski, Jens Muhle, Ray F. Weiss
By
Water Resources Mission Area, California Water Science Center

Assessing California groundwater susceptibility using trace concentrations of halogenated volatile organic compounds

Twenty-four halogenated volatile organic compounds (hVOCs) and SF6 were measured in groundwater samples collected from 312 wells across California at concentrations as low as 10–12 grams per kilogram groundwater. The hVOCs detected are predominately anthropogenic (i.e., “ahVOCs”) and as such their distribution delineates where groundwaters are impacted and susceptible to human activity. ahVOC dete
Authors
Daniel A. Deeds, Justin T. Kulongoski, Kenneth Belitz
By
Water Resources Mission Area, California Water Science Center

Evidence for crustal degassing of CF4 and SF6 in Mojave Desert groundwaters

Dissolved tetrafluoromethane (CF4) and sulfur hexafluoride (SF6) concentrations were measured in groundwater samples from the Eastern Morongo Basin (EMB) and Mojave River Basin (MRB) located in the southern Mojave Desert, California. Both CF4 and SF6 are supersaturated with respect to equilibrium with the preindustrial atmosphere at the recharge temperatures and elevations of the Mojave Desert. Th
Authors
D.A. Deeds, M.K. Vollmer, J.T. Kulongoski, B.R. Miller, J. Muhle, C.M. Harth, J. A. Izbicki, David R. Hilton, R.F. Weiss
By
Water Resources Mission Area, California Water Science Center

Non-USGS Publications**

Deeds, D.A., Ghoshdastidar, J.A., Raofie, F., Guerette, E.-A., Tessier, A., and Ariya, P.A., 2015, Development of a Particle-Trap Preconcentration-Soft Ionization Mass Spectrometric Technique for the Quantification of Mercury Halides in Air: Anal. Chem., 87(10), 5109–5116.
Deeds, D.A., Banic, C.M., Lu, J., and Daggupaty, S., 2015, Mercury speciation in a coal-fired power plant plume: An aircraft-based study of emissions from the 3640 MW Nanticoke Generating Station, Ontario, Canada: J. Geophys. Res.: Atmos. 118, 1–17.
Deeds, D.A., Mühle, J., and Weiss, R.F., 2008, Tetrafluoromethane in the deep North Pacific Ocean:
Geophys. Res. Lett., 35, L14606, doi:10.1029/2008GL034355.

**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.

Science and Products

Tectonic activity as a significant source of crustal tetrafluoromethane emissions to the atmosphere: observations in groundwaters along the San Andreas Fault

Tetrafluoromethane (CF4) concentrations were measured in 14 groundwater samples from the Cuyama Valley, Mil Potrero and Cuddy Valley aquifers along the Big Bend section of the San Andreas Fault System (SAFS) in California to assess whether tectonic activity in this region is a significant source of crustal CF4 to the atmosphere. Dissolved CF4 concentrations in all groundwater samples but one were
Authors
Daniel A. Deeds, Justin T. Kulongoski, Jens Muhle, Ray F. Weiss
By
Water Resources Mission Area, California Water Science Center

Assessing California groundwater susceptibility using trace concentrations of halogenated volatile organic compounds

Twenty-four halogenated volatile organic compounds (hVOCs) and SF6 were measured in groundwater samples collected from 312 wells across California at concentrations as low as 10–12 grams per kilogram groundwater. The hVOCs detected are predominately anthropogenic (i.e., “ahVOCs”) and as such their distribution delineates where groundwaters are impacted and susceptible to human activity. ahVOC dete
Authors
Daniel A. Deeds, Justin T. Kulongoski, Kenneth Belitz
By
Water Resources Mission Area, California Water Science Center

Evidence for crustal degassing of CF4 and SF6 in Mojave Desert groundwaters

Dissolved tetrafluoromethane (CF4) and sulfur hexafluoride (SF6) concentrations were measured in groundwater samples from the Eastern Morongo Basin (EMB) and Mojave River Basin (MRB) located in the southern Mojave Desert, California. Both CF4 and SF6 are supersaturated with respect to equilibrium with the preindustrial atmosphere at the recharge temperatures and elevations of the Mojave Desert. Th
Authors
D.A. Deeds, M.K. Vollmer, J.T. Kulongoski, B.R. Miller, J. Muhle, C.M. Harth, J. A. Izbicki, David R. Hilton, R.F. Weiss
By
Water Resources Mission Area, California Water Science Center

Non-USGS Publications**

Deeds, D.A., Ghoshdastidar, J.A., Raofie, F., Guerette, E.-A., Tessier, A., and Ariya, P.A., 2015, Development of a Particle-Trap Preconcentration-Soft Ionization Mass Spectrometric Technique for the Quantification of Mercury Halides in Air: Anal. Chem., 87(10), 5109–5116.
Deeds, D.A., Banic, C.M., Lu, J., and Daggupaty, S., 2015, Mercury speciation in a coal-fired power plant plume: An aircraft-based study of emissions from the 3640 MW Nanticoke Generating Station, Ontario, Canada: J. Geophys. Res.: Atmos. 118, 1–17.
Deeds, D.A., Mühle, J., and Weiss, R.F., 2008, Tetrafluoromethane in the deep North Pacific Ocean:
Geophys. Res. Lett., 35, L14606, doi:10.1029/2008GL034355.

**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.