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Online Publications: Groundwater


Scientific Investigations Report: SIR 2010-5186
Jeff P. Raffensperger, Brandon J. Fleming, William S.L. Banks, Marilee A. Horn, Mark R. Nardi, and David C. Andreasen, Simulation of Groundwater Flow to Assess Future Withdrawals Associated with Base Realignment and Closure (BRAC) at Fort George G. Meade, Maryland, 60 p.

Open File Report: OFR 2010-1209
Curtin, S.E., Andreasen, D.C., and Staley, A.W, Potentiometric Surface of the Patuxent Aquifer in Southern Maryland, September 2009, 1p.

Open File Report: OFR 2010-1208
Curtin, S.E., Andreasen, D.C., and Staley, A.W, Difference Between the Potentiometric Surfaces of the Lower Patapsco Aquifer in Southern Maryland, September 1990 and September 2009 , 1p.

Open File Report: OFR 2010-1207
Curtin, S.E., Andreasen, D.C., and Staley, A.W, Potentiometric Surface of the Lower Patapsco Aquifer in Southern Maryland, September 2009 , 1p.

Open File Report: OFR 2010-1206
Curtin, S.E., Andreasen, D.C., and Staley, A.W, The Difference Between the Potentiometric Surfaces of the Upper Patapsco Aquifer in Southern Maryland, September 1990 and September 2009, 1p.

Open File Report: OFR 2010-1205
Curtin, S.E., Andreasen, D.C., and Staley, A.W, Potentiometric Surface of the Upper Patapsco Aquifer in Southern Maryland, September 2009, 1p.

Open File Report: OFR 2010-1204
Curtin, S.E., Andreasen, D.C., and Staley, A.W, The Difference Between the Potentiometric Surfaces of the Magothy Aquifer in Southern Maryland, September 1975 and September 2009 , 1p.

Open File Report: OFR 2010-1203
Curtin, S.E., Andreasen, D.C., and Staley, A.W, Potentiometric Surface of the Magothy Aquifer in Southern Maryland, September 2009 , 1p.

Open File Report: OFR 2010-1202
Curtin, S.E., Andreasen, D.C., and Staley, A.W, The Difference Between the Potentiometric Surfaces of the Aquia Aquifer in Southern Maryland, September 1982 and September 2009 , 1p.

Open File Report: OFR 2010-1201
Curtin, S.E., Andreasen, D.C., and Staley, A.W, Potentiometric Surface of the Aquia Aquifer in Southern Maryland, September 2009, 1p.

Scientific Investigations Report: SIR 2009-5064
William S.L. Banks and Betzaida Reyes, Anthropogenic Organic Compounds in Source and Finished Groundwater of Community Water Systems in the Piedmont Physiographic Province, Potomac River Basin, Maryland and Virginia, 2003-04, 48p.

Scientific Investigations Report: SIR 2009-5064
William S.L. Banks and Betzaida Reyes, Anthropogenic Organic Compounds in Source and Finished Groundwater of Community Water Systems in the Piedmont Physiographic Province, Potomac River Basin, Maryland and Virginia, 2003-04, 48p.

Open File Report: OFR 2009-1088
Stephen E. Curtin (USGS), David C. Andreasen (MGS), and Andrew W. Staley (MGS), Potentiometric Surface of the Patuxent Aquifer in Southern Maryland, September 2007, 1p.

Open File Report: OFR 2009-1087
Stephen E. Curtin (USGS), David C. Andreasen (MGS), and Andrew W. Staley (MGS), The Difference Between the Potentiometric Surfaces of the Lower Patapsco Aquifer in Southern Maryland, September 1990 and September 2007, 1p.

Open File Report: OFR 2009-1086
Stephen E. Curtin (USGS), David C. Andreasen (MGS), and Andrew W. Staley (MGS), Potentiometric Surface of the Lower Patapsco Aquifer in Southern Maryland, September 2007, 1p.

Open File Report: OFR 2009-1085
Stephen E. Curtin (USGS), David C. Andreasen (MGS), and Andrew W. Staley (MGS), The Difference Between the Potentiometric Surfaces of the Upper Patapsco Aquifer in Southern Maryland, September 1990 and September 2007, 1p.

Open File Report: OFR 2009-1084
Stephen E. Curtin (USGS), David C. Andreasen (MGS), and Andrew W. Staley (MGS), Potentiometric Surface of the Upper Patapsco Aquifer in Southern Maryland, September 2007, 1p.

Open File Report: OFR 2009-1083
Stephen E. Curtin (USGS), David C. Andreasen (MGS), and Andrew W. Staley (MGS), The Difference Between the Potentiometric Surfaces of the Magothy Aquifer in Southern Maryland, September 1975 and September 2007, 1p.

Open File Report: OFR 2009-1082
Stephen E. Curtin (USGS), David C. Andreasen (MGS), and Andrew W. Staley (MGS), Potentiometric Surface of the Magothy Aquifer in Southern Maryland, September 2007, 1p.

Open File Report: OFR 2009-1081
Stephen E. Curtin (USGS), David C. Andreasen (MGS), and Andrew W. Staley (MGS), The Difference Between the Potentiometric Surfaces of the Aquia Aquifer in Southern Maryland, September 1982 and September 2007, 1p.

Open File Report: OFR 2009-1080
Stephen E. Curtin (USGS), David C. Andreasen (MGS), and Andrew W. Staley (MGS), Potentiometric Surface of the Aquia Aquifer in Southern Maryland, September 2007 , 1p.

Fact Sheet: FS 2009-3032
Daniel J. Soeder and William M. Kappel, Water Resources and Natural Gas Production from the Marcellus Shale, 6p.

Fact Sheet: FS 2009-3009
David Bolton, James Gerhart, and Saeid Kasraei, Sustainability of Water Resources in the Fractured-Rock Area of Maryland, 2p.

Scientific Investigations Report: SIR 2008-5190
Scott W. Ator, Natural and Human Influences on Water Quality in a Shallow Regional Unconsolidated Aquifer, Northern Atlantic Coastal Plain, 32p.

Scientific Investigations Report: SIR 2008-5144
Cheryl A. Dieter and William B. Fleck, Simulation of Groundwater Flow and Optimization of Withdrawals from Aquifers at the Naval Air Station Patuxent River, St. Mary's County, Maryland, 48p.

Fact Sheet: FS 2008-3068
Scott W. Ator and Betzaida Reyes, Pesticides in Groundwater of Central and Western Maryland, 6p.

Scientific Investigations Report: SIR 2007-5249
By Daniel J. Soeder, Jeff P. Raffensperger, and Mark R. Nardi, Effects of Withdrawals on Groundwater Levels in Southern Maryland and the Adjacent Eastern Shore, 1980-2005, 94p.

Open File Report: OFR 2007-1205
By Robert J. Shedlock, David W. Bolton, Emery T. Cleaves, James M. Gerhart, and Mark R. Nardi, A Science Plan for a Comprehensive Regional Assessment of the Atlantic Coastal Plain Aquifer System in Maryland, 36p.

Scientific Investigations Report: SIR 2006-5266
By Cheryl A. Klohe and Robert T. Kay, Hydrogeology of the Piney Point-Nanjemoy, Aquia, and Upper Patapsco Aquifers, Naval Air Station Patuxent River and Webster Outlying Field, St. Marys County, Maryland, 2000-06, 36 p

Scientific Investigations Report: SIR 2006-5233
By Emily H. Majcher , Daniel J. Phelan Michelle M. Lorah, and Angela L. McGinty, Characterization of Preferential Groundwater Seepage From a Chlorinated Hydrocarbon-Contaminated Aquifer to West Branch Canal Creek, Aberdeen Proving Ground, Maryland, 2002-04, 204p.

Scientific Investigations Report: SIR 2006-5190
By Edward J. Doheny and Gary T. Fisher, Hydraulic Geometry Characteristics of Continuous-Record Streamflow-Gaging Stations on Four Urban Watersheds Along the Main Stem of Gwynns Falls, Baltimore County and Baltimore City, Maryland, 34 p.

Scientific Investigations Report: SIR 2006-5011
By Michael T. Koterba, A. Scott Andres (Delaware Geological Survey), Joseph Vrabel, Dianna M. Crilley, Zolton Szabo, John F. DeWild, George R. Aiken, and Betzaida Reyes-Padro, Occurrence and Distribution of Mercury in the Surficial Aquifer, Long Neck Peninsula, Sussex County, Delaware, 2003-04 175p.

Fact Sheet: FS 2006-3009
By Robert J. Shedlock (U.S. Geological Survey) and David W. Bolton (Maryland Geological Survey), Sustainability of the Groundwater Resources in the Atlantic Coastal Plain of Maryland 2p.

Fact Sheet: FS 2006-3119
By Judith M. Denver and Scott W. Ator, Pesticides in Groundwater of the Maryland Coastal Plain , 24p.

Open File Report: OFR 2006-1392
By Cheryl A. Klohe and Linda M. Debrewer, Summary of Groundwater-Quality Data in the Anacostia River Watershed, Washington, D.C., September-December 2005, 74 p.

Scientific Investigations Report: SIR 2005-5257
By Linda M. Debrewer, Scott W. Ator, and Judith M. Denver, Factors Affecting Spatial and Temporal Variability in Nutrient and Pesticide Concentrations in the Surficial Aquifer on the Delmarva Peninsula, 56 p

Fact Sheet: FS 2005-3030
By James M. Gerhart (U.S. Geological Survey) and Emory T. Cleaves (Maryland Geological Survey), The Status of Streamflow and Groundwater level Monitoring Networks in Maryland, 2005, 6p.

Open File Report: OF 2005-1004
By Stephen E. Curtin, David C. Andreasen, Judith C. Wheeler, Potentiometric Surface Map of the Aquia Aquifer in Southern Maryland, September, 2003, 1p.

Open File Report: OF 2005-1005
By Stephen E. Curtin, David C. Andreasen, Judith C. Wheeler, The Difference Between the Potentiometric Surfaces of the Aquia Aquifer, September 1982 and September 2003 in Southern Maryland, 1p

Open File Report: OF 2005-1006
By Stephen E. Curtin, David C. Andreasen, Judith C. Wheeler, Potentiometric Surface Map of the Magothy Aquifer in Southern Maryland, September, 2003, 1p

Open File Report: OF 2005-1007
By Stephen E. Curtin, David C. Andreasen, Judith C. Wheeler, The Difference Between the Potentiometric Surfaces of the Magothy Aquifer, September 1975 and September 2003 in Southern Maryland, 1p

Open File Report: OF 2005-1008
By Stephen E. Curtin, David C. Andreasen, Judith C. Wheeler, Potentiometric Surface Map of the Upper Patapsco Aquifer in Southern Maryland, September, 2003, 1p

Open File Report: OF 2005-1009
By Stephen E. Curtin, David C. Andreasen, Judith C. Wheeler, The Difference Between the Potentiometric Surfaces of the Upper Patapsco Aquifer, September 1990 and September 2003 in Southern Maryland, 1p

Open File Report: OF 2005-1010
By Stephen E. Curtin, David C. Andreasen, Judith C. Wheeler, Potentiometric Surface Map of the Lower Patapsco Aquifer in Southern Maryland, September, 2003, 1p

Open File Report: OF 2005-1011
By Stephen E. Curtin, David C. Andreasen, Judith C. Wheeler, The Difference Between the Potentiometric Surfaces of the Lower Patapsco Aquifer, September 1990 and September 2003 in Southern Maryland, 1p

Scientific Investigations Report: SIR 2004-5118
By Earl A. Greene, Andrew E. LaMotte, and Kerri-Ann Cullinan, Groundwater Vulnerability to Nitrate Contamination at Multiple Thresholds in the Mid-Atlantic Region Using Spatial Probability Models, 24p.

Scientific Investigations Report: SIR 2004-5190
By Lisa D. Olsen and Frederick J. Tenbus, Design and Analysis of a Natural-Gradient Groundwater Tracer Test in a Freshwater Tidal Wetland, West Branch Canal Creek, Aberdeen Proving Ground, Maryland, 116p.

Scientific Investigations Report: SIR 2004-5011
Marie Stewart, William R. Guertal, and Jeffrey R. Barbaro (USGS) and Timothy McHale (Dover National Test Site), Distribution of Methyl Tert-Butyl Ether (MTBE) and Selected Water-Quality Constituents in the Surficial Aquifer at the Dover National Test Site, Dover Air Force Base, Delaware, 2001, 13 p.

Fact Sheet: FS 2004-3067
By Earl A. Greene, Andrew E. LaMotte, Kerri-Ann Cullinan,and Elizabeth R. Smith, Groundwater Vulnerability to Nitrate Contamination at Multiple Thresholds in the Mid-Atlantic Region, 4p.

Open File Report: OFR 2004-1324
By Andrew A. LaMotte , Metadata for ReVA Logistic Regression Dataset, 9 p.

Water Resources Investigations Report: WRIR 03-4294
By Earl A. Greene, Allen M. Shapiro, and Andrew E. LaMotte, Hydrogeologic Controls on Groundwater Discharge to the Washington METRO Subway Tunnel Near the Medical Center Station and Crossover, Montgomery County, Maryland, 33 p.

Open File Report: OFR 03-318
By Frederick J. Tenbus, Lithologic Coring in the Lower Anacostia Tidal Watershed, Washington, D.C., July 2002, 62 p.

Open File Report: OFR 03-380
William R. Guertal, Marie Stewart, and Jeffrey R. Barbaro (USGS) and Timothy McHale (Dover National Test Site), Analytical Results From Groundwater Sampling Using a Direct-Push Technique at the Dover National Test Site, Dover Air Force Base, Delaware, June-July 2001, 31 p.

Open File Report: OFR 03-258
S.E. Curtin, D.C. Andreasen, and J.C. Wheeler, Potentiometric Surface of the Lower Patapsco Aquifer in Southern Maryland, September 2002, 1p., Scale 1:250,000.

Open File Report: OFR 03-257
S.E. Curtin, D.C. Andreasen, and J.C. Wheeler, Potentiometric Surface of the Upper Patapsco Aquifer in Southern Maryland, September 2002, 1p., Scale 1:250,000.

OFR 03-256
S.E. Curtin, D.C. Andreasen, and J.C. Wheeler, Potentiometric Surface of the Magothy Aquifer in Southern Maryland, September 2002, 1 p., Scale 1:250,000.

Open File Report: OFR 03-255
S.E. Curtin, D.C. Andreasen, and J.C. Wheeler, Potentiometric Surface of the Aquia Aquifer in Southern Maryland, September 2002, 1 p., Scale 1:250,000.

Open File Report: OFR 03-73
Cherie V. Miller and Cheryl A. Klohe, Summary of Water- and Sediment-Quality Data for Anacostia River Well Sites Sampled in July-August 2002, 54 p.

Fact Sheet: FS 091-03
By Scott W. Phillips and Bruce D. Lindsey, The Influence of Groundwater on Nitrogen Delivery to the Chesapeake Bay, 6 p.

Water Resources Investigations Report: WRIR 02-4282
Daniel J. Soeder and Cherie V. Miller, Groundwater Contamination from Lead Shot at Prime Hook National Wildlife Refuge, Sussex County, Delaware, 26 p.

Water Resources Investigations Report: WRIR 02-4076
Daniel J. Phelan, William B. Fleck, Michelle M. Lorah, and Lisa D. Olsen, Changes in Groundwater Quality in the Canal Creek Aquifer Between 1995 and 2000–2001, West Branch Canal Creek Area, Aberdeen Proving Ground, Maryland, 42 p.

Water Resources Investigations Report: WRIR 02-4121
Jeffrey R. Barbaro and Pradumna P. Neupane, Distribution and Mass Loss of Volatile Organic Compounds in the Surficial Aquifer at Sites FT03, LF13, and WP14/LF15, Dover Air Force Base, Delaware, November 2000–February 2001, 53p.

Water Resources Investigations Report: WRIR 02-4029
Jonathan J.A. Dillow, William S.L. Banks and Michael J. Smigaj, Groundwater Quality and Discharge to Chincoteague and Sinepuxent Bays Adjacent to Assateague Island National Seashore, Maryland, 42p.

Open File Report: OFR-02-449
S.E. Curtin, D.C. Andreasen, and J.C. Wheeler, The Difference Between the Potentiometric Surfaces of the Aquia Aquifer, September 1982 and September 2001 in Southern Maryland, 1 p., Scale 1:250,000.

Open File Report: OFR-02-448
S.E. Curtin, D.C. Andreasen, and J.C. Wheeler, Potentiometric Surface of the Lower Patapsco Aquifer in Southern Maryland, September 2001, p., Scale 1:250,000.

Open File Report: OFR-02-447
S.E. Curtin, D.C. Andreasen, and J.C. Wheeler, The Difference Between the Potentiometric Surfaces of the Upper Patapsco Aquifer, September 1990 and September 2001 in Southern Maryland, 1 p., Scale 1:250,000.

Open File Report: OFR-02-446
S.E. Curtin, D.C. Andreasen, and J.C. Wheeler, Potentiometric Surface of the Upper Patapsco Aquifer in Southern Maryland, September 2001, 1 p., Scale 1:250,000.

Open File Report: OFR-02-445
S.E. Curtin, D.C. Andreasen, and J.C. Wheeler, The Difference Between the Potentiometric Surfaces of the Magothy Aquifer, September 1975 and September 2001 in Southern Maryland, 1 p., Scale 1:250,000.

Open File Report: OFR-02-444
S.E. Curtin, D.C. Andreasen, and J.C. Wheeler, Potentiometric Surface of the Magothy Aquifer in Southern Maryland, September 2001, 1 p., Scale 1:250,000.

Open File Report: OFR-02-443
S.E. Curtin, D.C. Andreasen, and J.C. Wheeler, The Difference Between the Potentiometric Surfaces of the Aquia Aquifer, September 1982 and September 2001 in Southern Maryland, 1 p., Scale 1:250,000.

Open File Report: OFR-02-442
S.E. Curtin, D.C. Andreasen, and J.C. Wheeler, Potentiometric Surface of the Aquia Aquifer in Southern Maryland, September 2001, 1 p., Scale 1:250,000.

Water Resources Investigations Report: WRIR 01-4216
William S.L. Banks and David A. Battigelli, Occurrence and Distribution of Microbiological Contamination and Enteric Viruses in Shallow Groundwater in Baltimore and Harford Counties, Maryland, 44p.

Water Resources Investigations Report: WRIR 01-4147
William S.L. Banks, Cheryl A. Klohe, and David A. Battigelli, Occurrence and Distribution of Enteric Viruses in Shallow Groundwater and Factors Affecting Well Vulnerability to Microbiological Contamination in Worcester and Wicomico Counties, Maryland, 28p.

Water Resources Investigations Report: WRIR 01-4150
Jeffry R. Barbaro, Assessment of Natural Attenuation of Groundwater Contamination at Sites FT03, LF13, and WP14/LF15, Dover Air Force Base, Delaware, 53p.

Water Resources Investigations Report: WRIR-01-4106
Frederick J. Tenbus and William B. Fleck, Simulation of Groundwater Flow and Transport of Chlorinated Hydrocarbons at Graces Quarters, Aberdeen Proving Ground, Maryland, 57p.

Open File Report: OFR 01-420
Tracey A. Spencer, Daniel J. Phelan, Lisa D. Olsen, and Michelle M. Lorah, Groundwater and Surface-Water Quality Data for the West Branch Canal Creek Area, Aberdeen Proving Ground, Maryland, November 1999–May 2001, 37 p.

Open File Report: OFR-01-327
Matthew J. Ferrari, Occurrence and Distribution of Selected Contaminants in Public Drinking-Water Supplies in the Surficial Aquifer in Delaware, 17p.

Open File Report: OFR-01-211
S.E. Curtin, D.C. Andreasen, and J.C. Wheeler, The Difference Between the Potentiometric Surfaces of the Lower Patapsco Aquifer, September 1990 and September 1999 in Southern Maryland, 1 p., Scale 1:250,000.

Open File Report: OFR-01-210
S.E. Curtin, D.C. Andreasen, and J.C. Wheeler, Potentiometric Surface of the Lower Patapsco Aquifer in Southern Maryland, September 1999, 1 p., Scale 1:250,000.

Open File Report: OFR-01-209
S.E. Curtin, D.C. Andreasen, and J.C. Wheeler, The Difference Between the Potentiometric Surfaces of the Upper Patapsco Aquifer, September 1990 and September 1999 in Southern Maryland, 1 p., Scale 1:250,000.

Open File Report: OFR-01-208
S.E. Curtin, D.C. Andreasen, and J.C. Wheeler, Potentiometric Surface of the Upper Patapsco Aquifer in Southern Maryland, September 1999, 1 p., Scale 1:250,000.

Open File Report: OFR-01-207
S.E. Curtin, D.C. Andreasen, and J.C. Wheeler, The Difference Between The Potentiometric Surfaces of The Magothy Aquifer, September 1975 and September 1999 in Southern Maryland, 1 p., Scale 1:250,000.

Open File Report: OFR-01-206
S.E. Curtin, D.C. Andreasen, and J.C. Wheeler, Potentiometric Surface of the Magothy Aquifer in Southern Maryland, September 1999, 1 p., Scale 1:250,000.

Open File Report: OFR-01-205
S.E. Curtin, D.C. Andreasen, and J.C. Wheeler, The Difference Between the Potentiometric Surfaces of the Aquia Aquifer, September 1982 and September 1999 in Southern Maryland, 1 p., Scale 1:250,000.

Open File Report: OFR-01-204
S.E. Curtin, D.C. Andreasen, and J.C. Wheeler, Potentiometric Surface of the Aquia Aquifer in Southern Maryland, September 1999, 1 p., Scale 1:250,000.

Open File Report: OFR-01-327
Matthew J. Ferrari, Occurrence and Distribution of Selected Contaminants in Public Drinking-Water Supplies in the Surficial Aquifer in Delaware, 17p.

Water Resources Investigations Report: WRIR 00-4283
William S. L. Banks and Jonathan J.A. Dillow, Optimization of Groundwater Withdrawal at the Old O-Field Area, Aberdeen Proving Ground, Maryland, 23p.

Open File Report: OFR-00-446
Daniel J. Phelan, Michael P. Senus, and Lisa D. Olsen - Lithologic and Groundwater-Quality Data Collected Using Hoverprobe Drilling Techniques at the West Branch Canal Creek Wetland, Aberdeen Proving Ground, Maryland, April-May 2000, 43 p.

Open File Report: OFR-00-208
Mick P. Senus and Frederick J. Tenbus, Long-Term Groundwater Monitoring Program and Performance-Evaluation Plan for the Extraction System at the Former Nike Missile Battery Site, Aberdeen Proving Ground, Maryland, 21p.

Fact Sheet: FS 053-00
By Joseph L. Bachman and David E. Krantz The Potential for Denitrification of Groundwater by Coastal Plain Sediments in the Patuxent River Basin, Maryland 2 figures, 1 table, 4 p.

Open File Report: OFR-99-88
Curtin, S.E., Andreasen, D.C., and Mack, F.K. The Difference Between the Potentiometric Surfaces of the Lower Patapsco Aquifer, September 1990 and September 1997 in Southern Maryland, 1 p., Scale 1:250,000.

Open File Report: OFR-99-87
Curtin, S.E., Andreasen, D.C., and Mack, F.K. Potentiometric Surface of the Lower Patapsco Aquifer in Southern Maryland, September 1997, 1 p., Scale 1:250,000.

Open File Report: OFR-99-86
Curtin, S.E., Andreasen, D.C., and Mack, F.K. The Difference Between the Potentiometric Surfaces of the Upper Patapsco Aquifer, September 1990 and September 1997 in Southern Maryland, 1 p., Scale 1:250,000.

Open File Report: OFR-99-85
Curtin, S.E., Andreasen, D.C., and Mack, F.K. Potentiometric Surface of the Upper Patapsco Aquifer in Southern Maryland, September 1997, 1 p., Scale 1:250,000.

Open File Report: OFR-99-84
Curtin, S.E., Andreasen, D.C., and Mack, F.K. The Difference Between the Potentiometric Surfaces of the Magothy Aquifer, September 1975 and September 1997 in Southern Maryland, 1 p., Scale 1:250,000.

Open File Report: OFR-99-83
Curtin, S.E., Andreasen, D.C., and Mack, F.K. Potentiometric Surface of the Magothy Aquifer in Southern Maryland, September 1997, 1 p., Scale 1:250,000.

Open File Report: OFR-99-82
Curtin, S.E., Andreasen, D.C., and Mack, F.K. Potentiometric Surface of the Aquia Aquifer in Southern Maryland, September 1997, 1 p., Scale 1:250,000.

Open File Report: OFR-99-81
Curtin, S.E., Andreasen, D.C., and Mack, F.K. The Difference Between the Potentiometric Surfaces of the Aquia Aquifer, September 1982 and September 1997 in Southern Maryland, 1 p., Scale 1:250,000.

Fact Sheet: FS 126-99
By Judith C. Wheeler, Freshwater Use In Delaware, 1995 2 figures, 2p.

Water Resources Investigations Report: WRIR 99-4224
Kurt C. Hinaman and Frederick J. Tenbus, Hydrogeology and Simulation of Groundwater Flow at Dover Air Force Base, Delaware, 72p.

Water Resources Investigations Report: WRIR 99-4167
Jonathan J.A. Dillow, and Earl A. Greene, Groundwater Discharge and Nitrate Loadings to the Coastal Bays of Maryland, 8p.

Water Resources Investigations Report: WRIR 98-4059
L.J. Bachman, B. Lindsey, J. Brakebill, and D.S. Powars, Groundwater Discharge and Base Flow Nitrate Loads of Nontidal Streams, and Their Relation to a Hydrogeomorphic Classification of the Chesapeake Bay Watershed, Middle Atlantic Coast

Water Resources Investigations Report: WRIR 98-4047
C.A. Donnelly and F.J. Tenbus, Temporal and vertical variation of hydraulic aquifers in the Edgewood Area, Aberdeen Proving Ground, Maryland, 5 tables, 12 figures, 26 p.

Fact Sheet: FS 115-98
By Judith C. Wheeler , Freshwater use in Maryland, 1995, 2 p.

Open File Report: OFR 97-666
Donnelly, C.A., Ferrarri, M.J., Summary of Pesticide Data from Streams Wells in the Potomac River Basin, 1993-96, 8 p.

Water Resources Investigations Report: WRIR 97-4225
M.J. Focazio, L.N. Plummer, J.K. Bohike, E. Busenberg, L.J. Bachman, and D.S Powars, Preliminary Estimates of Residence Times and Apparent Ages of Groundwater in the Chesapeake Bay Watershed, and Water Quality Data From a Survey of Springs, 75 p.

Water Resources Investigations Report: WRIR 97-4139
S.W. Ator, and M.J. Ferrari, Nitrate and selected pesticides in Groundwater of the Mid-Atlantic Region, 8 p.

Water Resources Investigations Report: WRIR 95-4099
Matthew J. Ferrari and Scott W. Ator., Nitrate in Groundwater in the Great Valley Carbonate Subunit of the Potomac River Basin, 6p.

Abstracts

Brakebill, J.W., 1995, Analyzing effects of land use on Groundwater quality in the Potomac River Basin: Abstract Booklet, Mid-Atlantic Highlands Area Environmental Monitoring and Assessment Conference, October 24-26, 1995.

Ferrari, M.J., 1994, Assessment of Groundwater quality in the Great Valley Carbonate subunit, Potomac River basin study unit, national water-quality assessment program [abs.]: EOS, Transactions of the American Geophysical Union, v. 75, n. 16, p. 166, Supplement with abstracts for the 1994 Spring Meeting, Baltimore, Md.

Ferrari, M.J., 1994, Assessment of Groundwater quality in the Great Valley Carbonate subunit, Potomac River Basin study unit, national water-quality assessment program [abs.]: Abstract Booklet, Mid-Atlantic Highlands Area Environmental Monitoring and Assessment Conference, Hershey, Pennsylvania, February 23-25, 1994, p. 39.

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