**Zoltan Szabo** is a research hydrologist with the U.S. Geological
Survey, New Jersey Water Science Center. He received MSc in

geochemistry from Ohio State University evaluating the potential of
**strontium isotopes** as ground-water flow tracers. He has been
investigating the occurrence and mobility of **radon and radium** since
1985 and has been the national leader in defining the occurrence of
short-lived radium-224 in ground water. He is one of three authors cited
for radionuclide studies by USEPA in the Radionuclide Rule of 2000 and
the accompanying Radionuclide NODA (Notice of Data Availability). He has
worked with isotopes as tracers of ground-water movement, including use
of tritium, helium-3, and stable isotopes of nitrogen and strontium. He
has helped design, test and implement \"ultra-clean\" **ground-water
sampling** protocols for trace elements, and sampling and analytical
procedures for radionuclides including conducting part of the methods
development and validation for the recently adopted Radium-224 Gamma
Spectroscopy Method \[American Public Health Association, Standard
Methods, 21^st^ edition, Method --E, Radium\]. He collaborates with
researchers at local universities and serves as a committee member for
graduate student candidates or as senior project advisor (most students:
Rutgers University). He is serving on the USGS NAWQA Program
Trace-Element Synthesis Team on radionuclide occurrence; the NIEHS
(National Institute Environmental Health & Safety) Superfund Basic
Research Program Committee (SBRP); the American Water Works Assoc.
Research Foundation (AWWARF) Radionuclide Technical Advisory Committee;
and serves as a technical advisor to the USGS NWQL (National Water
Quality Laboratory) to the radionuclide and tritium-helium analytical
services and associated contracts. Recipient of the USGS NE Region
Report of the Year Award (1998). He continues currently working on
designing sampling programs to collect ng/L-level data on **mercury**
distribution in the environment; characterizing organic **wastewater and
pharmaceutical compound occurrence** and fate in ground water; and
short-lived radioisotope monitoring and occurrence in the environment.

Zoltan Szabo

Research Hydrologist

U.S. Geological Survey

New Jersey Water Science Center

810 Bear Tavern Rd., Room 206

W.Trenton, NJ 08628

(609)771-3929

<zszabo@usgs.gov>

WEBLINK --Something else useful at USGS re Geochemistry in NJ

WEBLINK to Most Significant Recent (5-10? years) Publications

DRAFT

Welch, A.H., **Szabo, Zoltan**, Parkhurst, D.L., Van Metre, P.C. and
Mullin, A.H., 1995, Gross-beta activity in ground water: Natural sources
and artifacts of sampling and laboratory analysis: Applied Geochemistry,
v. 10, p. 491-503.

**Szabo, Zoltan**, Rice, D.E., Plummer, L.N., Busenberg, Eurybades,
Drenkard, Stefan and Schlosser, Peter, 1996, Age dating of shallow
groundwater with chlorofluorocarbons, tritium/helium-3, and flow path
analysis, southern New Jersey coastal plain: Water Resources Research,
v. 32, no. 4, p. 1023-1038.

**Szabo, Zoltan**, Taylor, T.A., Payne, D.F. and Ivahnenko, Tamara,
1997, Relation of hydrogeologic characteristics to distribution of
radioactivity in ground water, Newark Basin, New Jersey: U.S. Geological
Survey Water Resources Investigations 95-4136, 143 p.

**Szabo, Zoltan**, Pucci, A.A., Jr. and Feigenson, M.D., 1997,
Sr-isotopic evidence for leakage of pore water from clay-silt confining
units to the Atlantic City 800-foot Sand, Atlantic City, New Jersey:
*in* Miller, K.G. and Snyder, S.W. (eds.), Proceedings of the Ocean
Drilling Program, Scientific Results, V. 150X, p. 343-354.

**Szabo, Zoltan** and dePaul, V.T., 1998, Radium-226 and Radium-228 in
shallow ground water, southern New Jersey: U.S. Geological Survey Fact
Sheet FS-062-98, 6 p.

Gibs, Jacob, **Szabo, Zoltan**, Ivahnenko, Tamara and Wilde, F. D.,
2000, Change in field turbidity and trace-element concentrations during
well purging: Ground Water, v. 38, no. 4, p. 577-588.

Focazio, M.J., **Szabo, Zoltan**, Kraemer, T.F., Mullin, A.H.,
Barringer, T.H. and dePaul, V.T., 2001, Occurrence of selected
radionuclides in ground water used for drinking water in the United
States: A reconnaissance Survey, 1998: U.S. Geological Survey Water
Resources Investigations Report 00-4273, 35 p.

Vowinkel, E.F., Grosz, A.E., Barringer, J.L., **Szabo, Zoltan**,
Stackelberg, P.E., Hopple, J.A., Grossman, J.N., Murphy, E.A., Serfes,
Michael and Spayd, Steven, 2001, Distribution of arsenic in the
environment in New Jersey: U.S. Geological Survey Open-File Report
01-142, 4 p.

**Szabo, Zoltan**, Jacobsen, Eric, and Reilly, T.J., 2004, Preliminary
evaluation of organic wastewater contaminants in septic tanks for
possible use as effluent tracers in shallow ground water: Proceedings,
4^th^ International Meeting on Pharmaceuticals and Endocrine Disrupting
Chemicals in the Environment, Minneapolis, MN, October 10-12, 2004, p.
36-37. (abstract)

**Szabo, Zoltan**, dePaul, V.T., Kraemer, T.F., Parsa, Bahman, 2005,
Occurrence of radium-224 and comparison to that of radium-226 and
radium-228 in water from the unconfined Kirkwood-Cohansey Aquifer
System, Southern New Jersey: U.S. Geological Survey Scientific
Investigations Report 2005-5224, 82 p.

Barringer, J.L., **Szabo, Zoltan,** Kauffman, L.J., Barringer, T.H.,
Stackelberg, P.E., Ivahnenko, Tamara, Rajagopalan, Shilpa, Krabbenhoft,
D.P., in press, Mercury concentrations in water from an unconfined
aquifer system, New Jersey Coastal Plain: Science Total Environment.