National Water-Quality Assessment (NAWQA) Program
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Squillace, P.J., and Moran, M.J., 2007, Factors associated with sources, transport, and fate of volatile organic compounds and their mixtures in aquifers of the United States: Environmental Science and Technology, vol. 41, no. 7, p. 2123-2130. doi: 10.1021/es061079w Available Online
Squillace, P.J., and Moran, M.J., 2006, Factors associated with sources, transport, and fate of volatile organic compounds in aquifers of the United States and implications for ground-water management and assessments: U.S. Geological Survey Scientific Investigations Report 2005-5269, 40 p. Available Online
Squillace, P.J., Zogorski, J.S., and Wilber, W.G., 1997, Preliminary assessment of the occurrence and possible sources of MTBE in groundwater in the United States, 1993-1994, U.S. Geological Survey: Chilton, John and others., eds., Congress on Groundwater in the Urban Environment, Nottingham, United Kingdom, Sept. 21-17 [Proceedings]: Netherlands, A.A. Balkema, p. 537-542.
Squillace, Paul J., Moran, Michael J., and Price, Curtis V., 2004, VOCs in shallow groundwater in new residential/commercial areas of the United States: Environmental Science and Technology, vol. 38, no. 20, p. 5327-5338. doi: 10.1021/es0349756 Available Online
Squillace, Paul J., Moran, Michael J., Lapham, Wayne W., Price, Curtis V., Clawges, Rick M., and Zogorski, John S., 1999, Volatile organic compounds in untreated ambient groundwater of the United States, 1985-95: Environmental Science and Technology, vol. 33, no. 23, p. 4176-4187. doi: 10.1021/es990234m Available Online
Squillace, Paul J., Pankow, James F., Korte, Nic E., and Zogorski, John S., 1997, Review of the environmental behavior and fate of methyl tert-butyl ether: Environmental Toxicology and Chemistry, vol. 16, no. 9, September 1997, p. 1836-1844. doi: 10.1897/1551-5028(1997)016<1836:ROTEBA>2.3.CO;2 Available Online
Squillace, Paul J., Pankow, James F., Korte, Nic E., and Zogorski, John S., 1996, Environment behavior and fate of methyl tert-butyl ether (MTBE): U.S. Geological Survey Fact Sheet 203-96, 6 p. Available Online
Squillace, Paul J., Pope, Daryll A., and Price, Curtis A., 1995, Occurrence of the gasoline additive MTBE in shallow ground water in urban and agricultural areas: U.S. Geological Survey Fact Sheet 114-95, 4 p. Available Online
Squillace, Paul J., Scott, Jonathon, Moran, Michael J., Nolan, B.T., and Kolpin, Dana W., 2002, VOCs, pesticides, nitrate, and their mixtures in groundwater used for drinking water in the United States: Environmental Science & Technology, vol. 36, no. 9, p. 1923-1930. doi: 10.1021/es015591n Available Online
Squillace, Paul J., Zogorski, John S., Wilber, William G., and Price, Curtis V., 1995, A preliminary assessment of the occurrence and possible sources of MTBE in ground water of the United States, 1993-94: U.S. Geological Survey Open-File Report 95-456, 15 p. Available Online
Squillace, Paul J., Zogorski, John S., Wilber, William G., and Price, Curtis V., 1996, A preliminary assessment of the occurrence and possible sources of MTBE in ground water of the United States, 1993-94: Environmental Science and Technology, vol. 30, no. 5, (also published as USGS Open-File Report 95-456), p. 1721-1730. doi: 10.1021/es9507170 Available Online
Stackelberg, P.E., Gilliom, R.J., Wolock, D.M., and Hitt, K.J., 2006, Development and application of a regression equation for estimating the occurrence of atrazine in shallow ground water beneath agricultural areas of the United States: U.S. Geological Survey, Scientific Investigations Report 2005-5287, 12 p. Available Online
Stackelberg, Paul E., Barbash, Jack E., Gilliom, Robert J., Stone, Wesley W., and Wolock David M., 2012, Regression models for estimating concentrations of atrazine plus deethylatrazine in shallow groundwater in agricultural areas of the United States: Journal of Environmental Quality, vol. 41, no. 2, 16 p. doi:10.2134/jeq2011.0200 Available Online
Starn, J.J., Bagtzoglou, A.C., and Robbins, G.A., 2010, Using atmospheric tracers to reduce uncertainty in groundwater recharge areas: Ground Water, vol. 48, no. 6, p. 858-868. doi: 10.1111/j.1745-6584.2010.00674.x Available Online
Starn, Jeffrey J., Bagtzoglou, Amvrossios C., and Robbins, Gary A., 2012, Methods for simulating solute breakthrough curves in pumping groundwater wells: Computers & Geoscience, online in advance of print, January 2012, 12 p. 10.1016/j.cageo.2012.01.011 Available Online
Starn, Jeffrey, Bagtzoglou, Amvrossios C., 2011, Programs for calibration-based Monte Carlo simulation of recharge areas: Ground Water, online in advance of print, October 2011, 5 p. 10.1111/j.1745-6584.2011.00868.x Available Online
Steele, G.V., Johnson, H.M., Sandstrom, M.W., Capel, P.D., and Barbash, J.E., 2008, Occurrence and fate of pesticides in four contrasting agricultural settings in the United States: Journal of Environmental Quality, vol. 37, p. 1116-1132. doi: 10.2134/jeq2007.0166 Available Online
Stets, E.G., Kelly, V.J., Broussad, W.P., III, Smith, T.E., and Crawford, C.G., 2012, Century-scale perspective on water quality in selected river basins of the conterminous United States: U.S. Geological Survey Scientific Investigations Report 2012-5225, 108 p. Available Online
Steuer, J.J., 2010, A generalized watershed disturbance-invertebrate relation applicable in a range of environmental settings across the continental United States: Urban Ecosystems, 10 p. doi: 10.1007/s11252-010-0131-x Available Online
Steuer, J.J. Stensvold, K.A., and Gregory, M.B., 2010, Determination of biologically significant hydrologic condition metrics in urbanizing watersheds: an empirical analysis over a range of environmental settings: Hydrobiologia, vol. 654, no. 1, 34 p., online only. doi: 10.1007/s10750-010-0362-0 Available Online
Steuer, J.J., Bales, J.D., and Giddings, E.M.P., 2009, Relationship of stream ecological conditions to simulated hydraulic metrics across a gradient of basin urbanization: Journal North American Benthological Society, vol. 28, no. 4, p. 955-976. doi: 10.1899/08-157.1 Available Online
Stewart, Jana S., 1994, Assessment of alternative methods for stratifying landsat TM data to improve land cover classification accuracy across areas with physiographic variation: University of Wisconsin-Madison, Master of Science thesis, 159 p.
Stolp, B.J. , 2007, Hydrogeologic Setting and Ground-Water Flow Simulations of the Salt Lake Valley Regional Study Area, Utah, Section 2 in Paschke, S.S., ed., Hydrogeologic settings and ground-water flow simulations for regional studies of the transport of anthropogenic and natural contaminants to public-supply wells--studies begun in 2001: U.S. Geological Survey Professional Paper 1737-A, p. 2-1 to 2-22. Available Online
Stone, W.W., 2013, Estimated annual agricultural pesticide use for counties of the conterminous United States, 1992-2009: U.S. Geological Survey Data Series 752, 1 p. Available Online
Stone, W.W., and Gilliom, R.J., 2009, Update of watershed regressions for pesticides (WARP) for predicting atrazine concentration in streams: U.S. Geological Survey Open-File Report 2009-1122, 22 p. Available Online
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