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Timothy Wilson

I obtained a Ph.D. in aqueous and sedimentary low-temperature geochemistry from Michgan State University in 1989. My dissertation was on the geochemistry and evolution of Michigan Basin brines. I have considerable experience with groundwater and surface water geochemistry of major ion and trace metal including numerical modeling of speciation and transport, and analytic methods.

I have been with the USGS since 1994 and have been involved with projects that include bio-remediation and air-sparging of chlorinated hydrocarbons in groundwater; evaluating loads of dioxins, PCB, pesticides and other organic and inorganic compounds in the tributaries to Newark and Raritan Bays; mercury and arsenic in soils, rivers, and lakes; pesticides in human wastes and waste water treatment effluent; and most recently, nutrient and sediment fluxes in Barnegat Bay, NJ.

Professional Experience

  • 1994-Present: Hydrologist/Geochemist with the U.S. Geological Survey. Currently working on determining fluxes of sediment, dissolved, and particulate trace organic and metal contaminants to the Newark and Raritan Bays, as part of the NJ-NY Harbor Estuary Contaminant Reduction Program. Also conducted research on (1) fate and transport of organic contaminants in the environment; (2) using air-spargi

  • 1992-1994: Senior Hydrologist, RMT. Inc. Madison Wisconsin. Project manager, chemical and hydrologic consulting, and oversight on numerous groundwater remediation projects involving geochemistry, ground water modeling, statistical evaluations and risk based models for remediation.

  • 1992 Atwood Energy Company, Dover, Ohio. Geochemical consultant and expert witness for various law cases dealing with oil-brine contamination.

  • 1988-1993 - Kent State University-Assistant Professor. Courses taught: Hydrogeochemistry, Environmental Geochemistry, Introductory Geology, Environmental Geology. Instructed Master and PH.D level students in thesis projects.

  • 1979 -1980: L.M. Miller and Associates, Ann Arbor Michigan. Geological Assistant, Part-time work: gathering of field data, surveying and drafting.

  • 1980-82: L.M. Miller and Associates, Ann Arbor Michigan. Geologist, Groundwater contamination investigations, ground water supply projects, geophysical investigations, drilling, pump and aquifer testing, ground water flow and contaminant modeling, and geochemical studies.

  • 1985-88: Dart Oil & Gas Co., Mason Michigan. Geochemical consultant, Groundwater and brine research associated with legal matters.

  • 1989-90: L.A. Coogan & Associates, Kent, Ohio. Geochemical consultant, involved with groundwater geochemical analysis.

  • 1990: Wayne Disposal, Inc, Wayne Michigan. Consultant on suitability of Michigan salt formations for disposing of hazardous wastes.

  • 1991: Warner/Osborne/Pardee, North Olmstead, Ohio. Consultant on investigation of trace-metal chemistry in black shales of northeastern Ohio.

Education and Certifications

  • 1989 - Ph.D., Geology/Geochemistry, Michigan State University

  • 1981-82 - University of Michigan (sponsored by employer)

  • 1980 - B.S., Geology, Michigan State University

Science and Products

Filter Total Items: 15

Sediment and chemical contaminant loads in tributaries to the Anacostia River, Washington, District of Columbia, 2016–17

A study was conducted by the U.S. Geological Survey (USGS) in cooperation with the Washington, D.C., Department of Energy & Environment to estimate the loads of suspended-sediment-bound chemical compounds in five gaged tributaries and four ungaged tributaries of the Anacostia River (known locally as “Lower Anacostia River”) in Washington, D.C. Tributaries whose discharge is measured by the USGS ar
By
Core Science Systems Mission Area, Water Resources Mission Area, Chesapeake Bay Activities, Maryland-Delaware-D.C. Water Science Center

In situ benthic nutrient flux and sediment oxygen demand in Barnegat Bay, New Jersey

The U.S. Geological Survey, in cooperation with the New Jersey Department of Environmental Protection, measured sediment oxygen demand (SOD) and benthic nutrient fluxes throughout Barnegat Bay, New Jersey. SOD was determined in situ using chambers equipped with optical dissolved oxygen sensors. The benthic nutrient fluxes of ammonia (NH3), nitrite + nitrate (plus ions; here, referred to as NO32),
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Water Resources Mission Area, New Jersey Water Science Center

In-situ sediment oxygen demand rates in Hammonton Creek, Hammonton, New Jersey, and Crosswicks Creek, near New Egypt, New Jersey, August-October 2009

Sediment oxygen demand rates were measured in Hammonton Creek, Hammonton, New Jersey, and Crosswicks Creek, near New Egypt, New Jersey, during August through October 2009. These rates were measured as part of an ongoing water-quality monitoring program being conducted in cooperation with the New Jersey Department of Environmental Protection. Oxygen depletion rates were measured using in-situ test
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Water Resources Mission Area, New Jersey Water Science Center

Distribution and seasonal dynamics of arsenic in a shallow lake in northwestern New Jersey, USA

Elevated concentrations of arsenic (As) occurred during warm months in water from the outlet of Lake Mohawk in northwestern New Jersey. The shallow manmade lake is surrounded by residential development and used for recreation. Eutrophic conditions are addressed by alum and copper sulfate applications and aerators operating in the summer. In September 2005, arsenite was dominant in hypoxic to anoxi
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Water Resources Mission Area, New Jersey Water Science Center

Occurrence of Organic Compounds and Trace Elements in the Upper Passaic and Elizabeth Rivers and Their Tributaries in New Jersey, July 2003 to February 2004: Phase II of the New Jersey Toxics Reduction Workplan for New York-New Jersey Harbor

Samples of surface water and suspended sediment were collected from the Passaic and Elizabeth Rivers and their tributaries in New Jersey from July 2003 to February 2004 to determine the concentrations of selected chlorinated organic and inorganic constituents. This sampling and analysis was conducted as Phase II of the New York-New Jersey Harbor Estuary Workplan?Contaminant Assessment and Reductio
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Water Resources Mission Area, New Jersey Water Science Center

Diurnal variations in, and influences on, concentrations of particulate and dissolved arsenic and metals in the mildly alkaline Wallkill River, New Jersey, USA

Diurnal variations in particulate and dissolved As and metal concentrations were observed in mildly alkaline water from a wetlands site on the Wallkill River in northwestern New Jersey. The site, underlain by glacial sediments over dolomite bedrock, is 10 km downstream from a mined area of the Franklin Marble, host to Zn ores, also As and Mn minerals. In mid-September 2005, maxima and minima in di

Concentrations and Loads of Organic Compounds and Trace Elements in Tributaries to Newark and Raritan Bays, New Jersey

A study was undertaken to determine the concentrations and loads of sediment and chemicals delivered to Newark and Raritan Bays by five major tributaries: the Raritan, Passaic, Rahway, Elizabeth, and Hackensack Rivers. This study was initiated by the State of New Jersey as Study I-C of the New Jersey Toxics Reduction Workplan for the New York-New Jersey Harbor, working under the NY-NJ Harbor Estua
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Water Resources Mission Area, New Jersey Water Science Center

Organic Compounds, Trace Elements, Suspended Sediment, and Field Characteristics at the Heads-of-Tide of the Raritan, Passaic, Hackensack, Rahway, and Elizabeth Rivers, New Jersey, 2000-03

Concentrations of suspended sediment, particulate and dissolved organic carbon, trace elements, and organic compounds were measured in samples from the heads-of-tide of the five tributaries to the Newark and Raritan Bays during June 2000 to June 2003. The samples were collected as part of the New Jersey Department of Environmental Protection Toxics Reduction Workplan/Contaminant Assessment Reducti
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Water Resources Mission Area, New Jersey Water Science Center

Sediment-water partitioning in tributaries of Newark and Raritan Bays, New Jersey, U.S.A.

No abstract available.
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Water Resources Mission Area, New Jersey Water Science Center

Performance of USEPA Method 1668-A in the New Jersey toxic reduction workplan for the New York-New Jersey Harbor, U.S.A.

No abstract available.
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Water Resources Mission Area, New Jersey Water Science Center

Analysis of persistent organic pollutants in the Newark Bay Estuary, New Jersey, U.S.A.

No abstract available.
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Water Resources Mission Area, New Jersey Water Science Center

Fire and invasives in mediterranean-climate ecosystems of California

By
Ecosystems Mission Area, Western Ecological Research Center (WERC)

Discharge and sediment data for selected tributaries to the Anacostia River, Washington, District of Columbia, 2003-18

Data release consists of five comma delimited text files containing discharge and sediment data for five gaged tributaries to the Anacostia River in Washington, District of Columbia. Data were collected from 2003 through 2018.
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Maryland-Delaware-D.C. Water Science Center

Benthic pore water and sediment data Barnegat Bay, New Jersey, 2012-2013

This data set presents pore water nutrient concentrations and sediment oxygen demand (SOD) measurements made at 12 locations around the margin of Barnegat Bay and at 3 locations in central Barnegat Bay. The data were collected during 2012-2013 for the Barnegat Bay Nutrient Study in cooperation with the New Jersey Department of Environmental Protection. Table 1 presents the site data including site
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New Jersey Water Science Center
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Science and Products