Precipitation Chemistry Quality Assurance Project (PCQA)

Chronological Bibliography

Coming in 2022

Wetherbee, G.A., 2020, U.S. Geological Survey Precipitation Chemistry Quality Assurance Project Data 2019 – 2020 U.S. Geological Survey ScienceBase Data Release,

Wetherbee, G.A., Martin, R. and Liethen, A., 2022, External quality assurance project report for the National Atmospheric Deposition Program’s National Trends Network and Mercury Deposition Network, 2019–20: U.S. Geological Survey Scientific Investigations Report 2022–####,

2021

Wetherbee, G., Wieczorek, M., Robertson, D., Saad, D., Novick, J., and Mast. M.A., 2021, Estimating urban air pollution contribution to South Platte River nitrogen loads with National Atmospheric Deposition Program data and SPARROW model, Journal of Environmental Management, 301 (2022) 113861Get the pdf,

Wetherbee, G.A., 2020, U.S. Geological Survey Precipitation Chemistry Quality Assurance Project Data 2017 – 2018 U.S. Geological Survey ScienceBase Data Release,

2020

Wetherbee, G.A., and Martin, R., 2020, External quality assurance project report for the National Atmospheric Deposition Program’s National Trends Network and Mercury Deposition Network, 2017–18: U.S. Geological Survey Scientific Investigations Report 2020–5084, 31 p., https://doi.org/ 10.3133/ sir20205084.

2019

Wetherbee, G., Baldwin, A., and Ranville, J., 2019, It is Raining Plastic., U.S. Geological Survey Open-File Report 2019-1048, poster format.

Wetherbee, G.A., 2019, Data for the U.S. Geological Survey Precipitation Chemistry Quality Assurance (PCQA) Project for the National Atmospheric Deposition Program (NADP), 1978 - 2017, https://www.sciencebase.gov/catalog/item/5b0dbb48e4b0c39c934b081c.

Wetherbee, G.A., Benedict, K.B., Murphy, S.F., and Elliott, E.M., 2019, Inorganic nitrogen wet deposition gradients in the Denver-Boulder metropolitan area and Colorado Front Range - Preliminary implications for Rocky Mountain National Park and interpolated deposition maps, Science of the Total Environment 691(2019), pp 1027-1042.

Wetherbee, G., Lowers, H. and Martin, RA., 2019, It is Raining Tires., in Proceedings NADP Fall Meeting and Scientific Symposium, Expanding the Boundaries of NADP, November 4-8, 2019, Boulder, Colorado, p. 84

2018

Wetherbee, G.A. and Martin, RA., 2018, U.S. Geological Survey external quality-assurance projectreport to the National Atmospheric Deposition Program / National Trends Network and Mercury Deposition Network, 2015-16, U.S. Geological Survey Scientific Investigations Report 2018-5034, 25 p.

Wetherbee, G., McDonnell, J., McClintock-Rager, D., Ludtke, A., Martin, RA., Kerschner, B., Devore, L., Webster, J., Novick, J., Murphy, S., and Kittelman, A.S., 2018, Enhancing wet-deposition maps with urban data: Preliminary results from the Network for Urban Atmospheric Nitrogen Chemistry, in 2018 Scientific Symposium and Fall Meeting, 40 Years of Monitoring Atmospheric Deposition: Historical Legacy and Looking Ahead to the Future, November 5 – 9, 2018 Albany, New York, p. 23.

Wetherbee, G. , Danielson, C., Shafer, M., Anderson, S., Gartman, N., Worley, C. and Mager, A., Comparison of Accuracy, Variability and Relative Bias for Two Central Analytical Laboratories for the National Atmospheric Deposition Program, in 2018 Scientific Symposium and Fall Meeting, 40 Years of Monitoring Atmospheric Deposition: Historical Legacy and Looking Ahead to the Future,
November 5 – 9, 2018 Albany, New York, p.83.

Wetherbee, G., Baldwin, A., and Ranville, J., 2018, It's Raining Plastic., in 2018 Scientific Symposium and Fall Meeting, 40 Years of Monitoring Atmospheric Deposition: Historical Legacy and Looking Ahead to the Future,
November 5 – 9, 2018 Albany, New York, p. 84.

 

2017

Wetherbee, G.A., 2017, Precipitation collector bias and its effects on temporal trends and spatial variability in National Atmospheric Deposition Program/
National Trends Network data,Environmental Pollution 233(2017),, pp 90-101.

Wetherbee, G.A., Lehmann, C.M.B., Kerschner, B.M., Ludtke, A.S., Green, L.A., and Rhodes, M.F., RETRACTED, Trends in bromide wet deposition concentrations in the contiguous United States, 2001-2016, https://doi.org/10.1016/j.envpol.2017.10.018, History: Available online 23 October 2017 and retracted in 2019 due to NADP sequestration of all bromide concentration data released prior to June 2017.

Wetherbee, G.A., Lehmann, C.M.B., Green, L.A., Rhodes, M.F., Kerschner, B.M., and Ludtke, A.S., 2017, Trends in NADP Bromide Wet Deposition Concentrations, 2001-2016, in 2017 Scientific Symposium and Fall Meeting, NADP Data: Making the World a Better Place One Monitor, One Network, One Study at a Time, October 30 - November 3, 2017, San Diego, California, p. 45.

2016

Wetherbee, G.A., 2016, Evaluation of National Atmospheric Deposition Program Measurements for Colocated Sites CO89 and CO98 at Rocky Mountain National Park, Water Years 2010-14, U.S. Geological Survey Scientific Investigations Report 2016-5051, 32 p.

Wetherbee, G.A. and  Martin, R.A, 2016, U.S. Geological Survey external quality-assurance project report to the National Atmospheric Deposition Program / National Trends Network and Mercury Deposition Network, 2013-14, U.S. Geological Survey Scientific Investigations Report 2016-5069, 22 p.

Wetherbee, G.A. and Mast, M.A., 2016, Annual variations in wet-deposition chemistry related to changes in climate, Climate Dynamics (2016) 47:3141–3155, DOI 10.1007/s00382-016-3017-7.

Wetherbee, G.A., 2016, Bias between N-CON and AeroChem precipitation collectors: Effects on trends and deposition maps for the National Atmospheric Deposition Program / National Trends Network, in 2016 Scientific Symposium and Fall Meeting, Deposition: What Does the Future Hold?, October 31-November 4, 2016, Santa Fe, New Mexico, p. 128.

 

2015

Wetherbee, G.A., Rhodes, M.F., Gay, D.A., Brunette, R.C., Prestbo, E.M., and Risch, M.R., 2015, Preliminary Evaluation of Methylmercury Concentrations for Wet Deposition Samples Collected in North America, 2003-2013, 2015 Canadian Geophysical Union/American Geophysical Union Joint Assembly, May 3-7, 2015, Montreal, Canada.

Wetherbee, G.A., Rhodes, M.F., Gay, D.A., Brunette, R.C., Prestbo, E.M., and Risch, M.R., 2015, Methylmercury in precipitation from NADP Mercury Deposition Network, Poster 15-PP-66, International Conference on Mercury as a Global Pollutant, June 14-19, 2015, Jeju, South Korea, p. 187.

Wetherbee, G.A., Martin, R.A., and Gay, D.A., 2015, Comparison of variability and bias within the interlaboratory comparison program for the Mercury (Hg) Deposition Network (MDN) 2012-2013, Poster 15-PP-67, International Conference on Mercury as a Global Pollutant, June 14-19, 2015, Jeju, South Korea, p. 187.

Wetherbee, G.A. and Rhodes, M.F., 2015, Assessment of wet-deposition sample contamination for the National Atmospheric Deposition Program / National Trends Network, Poster P-38, Session P-2, 9th International Conference on Acid Deposition (Acid Rain 2015), October 19-23, 2015, Rochester, New York, p. 341.

Wetherbee, G.A., and Mast, M.A., 2015, Related changes in snow season duration and wet-deposition chemistry in the contiguous USA, Poster P-59, Session P-2, 9th International Conference on Acid Deposition (Acid Rain 2015), October 19-23, 2015, Rochester, New York, p. 342.

 

2014

Wetherbee, G.A. and  Martin, R.A, 2014, U.S. Geological Survey external quality-assurance projectreport to the National Atmospheric Deposition Program / National Trends Network and Mercury Deposition Network, 2011-12, NADP QA Report 2014-01, Illinois State Water Survey Miscellaneous Report 202, Champaign, Ill..

 

2013

Wetherbee, G.A., Martin, R.A., Rhodes, M.F., and Chesney, T.A., 2013, U.S. Geological Survey external quality-assurance project report for the National Atmospheric Deposition Program / National Trends Network and Mercury Deposition Network, 2009-10, U.S. Geological Survey Scientific Investigations Report 2013-5147

Wetherbee, G.A and Rhodes, Mark F., 2013, Effects of equipment performance on data quality from the National Atmospheric Deposition Program/National Trends Network and the Mercury Deposition Network , U.S. Geological Survey Open-File Report 2013-1031, 62p.

Wetherbee, G.A., Lehmann, C.M.B., Debey, T.M., Gay, D.A., Nilles, M.A., and Brunette, R.C., 2013, Response of the National Atmospheric Deposition Program to the Fukushima Dai-ichi disaster:  Value of Long-Term Monitoring for Post-Disaster Assessments, proceedings of the 245th ACS National Meeting, Post Disaster Chemistry Symposium, New Orleans, L.A., April 7, 2013.

Lin, N-H, Sheu, G-R, Wetherbee, G.A., and Debey, T.M., 2013, Particulate mercury in cloud water collected on Mount Bamboo, Taiwan, 2013 International Conference on Mercury as a Global Pollutant, Edinburgh, Scotland, July 28 – August 2, 2013.

Lin, N-H, Sheu, G-R, Wetherbee, G.A., and Debey, T.M., 2013, Instrumental neutron activation analysis data for cloud-water particulate samples, Mount Bamboo, Taiwan, March 22-24, 2002, U.S. Geological Survey Open-File Report 2013-1147, 12p.

 

Wetherbee, G.A., Rhodes, M.F., and Ludtke, A.S., 2013, Statistical Comparison of OTT Pluvio-2 and Belfort 5-780 Weekly Precipitation Records, proceedings of the 2013 Annual Meeting and Scientific Symposium, Park City, Utah, October 8-10, 2013, p. 130.

2012

Wetherbee, G.A., Debey, T.M., and Lehmann, C.M.B., 2012, Estimation of particulate mercury washout using National Atmospheric Deposition Program samples and instrumental neutron activation analysis, Poster A51, National Water-Quality Monitoring Council’s Eighth National Conference, Portland, Oregon, April 30-May 12, 2012.

Gay, D.A., Wetherbee, G.A., Lehmann, C.M.B., Debey, T.M., Nilles, M.A., 2012, Measurements of fission-product wet deposition to North America from the Fukushima incident by the National Atmospheric Deposition Program, Invited presentation to the 2012 Nuclear Energy Institute, RETS/REMP Workshop, Orlando, Florida, June 25-27, 2012.

Dombek, T., Rhodes, M., and Wetherbee, G., Bag Sampling with NADP NTN and AIRMoN Wet Deposition Samples, proceedings of the 2012 Annual Meeting and Scientific Symposium, The NADP Cooperative:  State, Local, and Tribal Perspectives, Portland, Maine, October 2-5, 2012, p. 83.

Wetherbee, G.A., Gay, D.A., Debey, T.M., Lehmann, C.M.B., and Nilles, M.A., Wet Deposition of Fission-Product Isotopes to North America from the Fukushima Dai-ichi Incident, March 2011, Environmental Science and Technology, doi:10.1021/es203217u, March 6, 2012.

 

2011

Wetherbee, G.A., Debey, T.M., Nilles, M.A., Gay, D.A., and Lehmann, C.M.B., Fission Products in National Atmospheric Deposition Program Wet Deposition Samples Following the Fukushima Dai-Ichi Nuclear Power  Station Incident, March 8 - April 5, 2011. U.S. Geological

Wetherbee, G.A., Gay, D.A., Debey, T.M., Lehmann, C.M.B., and Nilles, M.A., 2011, Reactor fission product fallout in North American wet-deposition samples, from the March 11, 2011 Fukushima Dai-ichi incident, proceedings of the 2011 Annual Meeting and Scientific Symposium, NADP at the Nexus:  Cross System Connections, Providence, Rhode Island, October 25-28, 2011.

Wetherbee, G.A., Debey, T.M., and Lehmann, C.M.B., 2011, Elemental Composition of Washout Particulates in NADP Samples by Instrumental Neutron Activation Analysis, proceedings of the 2011 Annual Meeting and Scientific Symposium, NADP at the Nexus:  Cross System Connections, Providence, Rhode Island, October 25-28, 2011.

Wetherbee, G.A., 2011, Data comparability for nine international mercury laboratories in United States, Canada, and Europe, 2004-09, proceedings of 10th Annual Conference of Mercury as a Global Pollutant (Mercury 2011), Halifax, Nova Scotia, Canada, July 24-29, 2011.

Wetherbee, G.A. and Rhodes, M.F., 2011, National Atmospheric Deposition Program / Mercury Deposition Network quality assurance for evaluation of spatial and temporal trends, proceedings of 10th Annual Conference of Mercury as a Global Pollutant (Mercury 2011), Halifax, Nova Scotia, Canada, July 24-29, 2011.

Wetherbee, G.A. and Nilles, M.A., 2011, Assessment of international wet-deposition data comparability for four Laboratories in Japan, United States, Canada, and Norway, 1999-2009, proceedings of Acid Rain 2011 Conference, Beijing, People’s Republic of China, June 16-19, 2011.

Wetherbee, G.A., Latysh, N.E., Lehmann, C.M.B., and Rhodes, M.F., 2011, Four studies on effects of environmental factors on the quality of National Atmospheric Deposition Program Measurements, U.S. Geological Survey Open-File Report 2011-1170, 36p.

Latysh, N.E. and Wetherbee, G.A., 2011, Improved mapping of National Atmospheric Deposition Program wet-deposition in complex terrain using PRISM-gridded data sets, Environmental Monitoring and Assessment, (2011),  doi 10.1007/s10661-011-2009-7, 16 p.

 

2010

Wetherbee, G.A., Latysh, N.E., and Chesney, T., 2010, U.S. Geological Survey External Quality-Assurance Program Results Reported to the National Atmospheric Deposition Program / National Trends Network and Mercury Deposition Network for 2007-08. NADP Quality Assurance Report 2010-01, Illinois State Water Survey Data/Case Study 2010-01. Illinois State Water Survey, Champaign, IL, 82p.

Wetherbee, G.A., Shaw, M.J., Latysh, N.E., Lehmann, C.M.B., and Rothert, J.E., 2010, Comparison of precipitation chemistry measurements obtained by the Canadian Air and Precipitation Monitoring Netowrk and National Atmospheric Deposition Program for the period 1995-2004, Environmental Monitoring and Assessment, (2010) 164:111–132, DOI 10.1007/s10661-009-0879-8.

 

2009

Wetherbee, G.A., Latysh, N.E., Greene, S.M., and Chesney, T., 2009. U.S. Geological Survey External Quality-Assurance Program Results Reported to the National Atmospheric Deposition Program / National Trends Network and Mercury Deposition Network for 2005-06. NADP Quality Assurance Report 2009-01, Illinois State Water Survey Data/Case Study 2009-01. Illinois State Water Survey, Champaign, IL, 54p.

2008

Wetherbee, G.A. and Lehmann, C.M.B., 2008. Mercury Deposition Network Site Operator Training for the System Blank and Blind Audit Programs: U.S. Geological Survey Open-file Report 2008-1252, Ver. 1.0, CDROM.

2007

Latysh, N.E., and Wetherbee, G.A., 2007. External Quality Assurance Programs Managed by the U.S. Geological Survey in Support of the National Atmospheric Deposition Program/Mercury Deposition Network: U.S. Geological Survey Open-file Report 2007-1170.

2006

Wetherbee, G.A., Gay, D.A., Brunette, R.C., and Sweet, C.W., 2006. Estimated Variability of National Atmospheric Deposition Program/Mercury Deposition Network Measurements Using Collocated Samplers: Environmental Monitoring and Assessment, DOI 10.1007/s10661-006-9456-6.

Wetherbee, G.A., Latysh, N.E., and Greene, S.M., 2005. External Quality-Assurance Results for the National Atmospheric Deposition Program/National Trends Network and Mercury Deposition Network, 2004: U.S. Geological Survey Scientific Investigations Report 2006-5067.

Wetherbee, G.A., Greene, S.A., and Gehrke, J.A., Field-Audit Site Operator Training: U.S. Geological Survey Open-File Report 2006-1010, Ver. 1.0, CDROM


2005

Wetherbee, G.A., Latysh, N.E., and Gordon, J.D., 2005. Spatial and temporal variability of the overall error of National Atmospheric Deposition Program measurements determined by the USGS collocated-sampler program, water years 1989-2001: Environmental Pollution 135, 407-418.

Latysh, N.E., and Wetherbee, G.A., 2005. External quality-assurance programs managed by the U.S. Geological Survey in support of the National Atmospheric Deposition Program/National Trends Network: U.S. Geological Survey Open-File Report 2005-1024.

Wetherbee, G.A., Latysh, N.E., and Burke, K.P., 2005. External Quality-Assurance Results for the National Atmospheric Deposition Program/National Trends Network, 2002-2003: U.S. Geological Survey Scientific Investigations Report 2005-5061.

2004

Wetherbee, G.A., Latysh, N.E., and Gordon, J.D., 2004. External quality-assurance results for the National Atmospheric Deposition Program and National Trends Network, 2000-2001: U.S. Geological Survey Scientific Investigations Report 2004-5034.


Latysh, N.E. and Gordon, J.D., 2004. Investigation of differences between field and laboratory pH measurements of National Atmospheric Deposition Program/National Trends Network precipitation samples: Water, Air, and Soil Pollution 154, 249-270.

2003

Gordon, J.D., Latysh, N.E., and Lindholm, S.J., 2003. External quality-assurance results for the National Atmospheric Deposition Program and National Trends Network, 1997-99: U.S. Geological Survey Water-Resources Investigations Report 03-4027.


2002

Gordon, J.D., 2002. Evaluation of candidate rain gages for upgrading precipitation measurement tools for the National Atmospheric Deposition Program: U.S. Geological Survey Water-Resources Investigations Report 02-4302.


1999

Gordon, J.D., 1999. External quality-assurance results for the National Atmospheric Deposition Program and National Trends Network, 1995-96: U.S. Geological Survey Water-Resources Investigations Report 99-4072.

Gordon, J.D., and Hult, L.L., 1999. Results form the Inter-laboratory Comparison Program Operated for the National Atmospheric Deposition Program/National Trends Network, 1983-1998: in Proceedings of the NADP Technical Committee Meeting, October 25-28, 1999, Sacramento, California, p. 23.


1997

Gordon, J.D., and Nilles, M.A., 1997. Summary of External Quality Assurance Programs and Results for the NADP/NTN. inProceedings of the Air and Waste Management Association Specialty Conference, Acid Rain and Electric Utilities II, VIP-70, January 1997, Scottsdale, AZ; AWMA, Pittsburgh, PA.

Gordon, J.D., Nilles, M.A., Polacsek, D.K., and Ratcliff, M.E., 1997. External quality-assurance results for the National Atmospheric Deposition Program and National Trends Network during 1994: Gordon, J.D., Schroder, L.J., Morden-Moore, A., and Bowersox, V. C., 1995. Stability of Hydrogen Ion and Specific Conductance in Filtered Wet-Deposition Samples Stored at Ambient Temperature. Water, Air, and Soil Pollution, v. 79. 1995: in U.S. Geological Survey Water-Resources Investigations Report 97-4201.


1995

Nilles, M.A., and Gordon, J.D., 1995. USGS Ensures Quality of Precipitation Chemistry Monitoring Network. U.S. Geological Survey Fact Sheet series FS-182-95.

Gordon, J.D., and Nilles, M.A., 1995. USGS Tracks Acid Rain. U.S. Geological Survey Fact Sheet series FS-183-95.

Gordon, J.D., Schroder, L.J., Morden-Moore, A., and Bowersox, V. C., 1995. Stability of Hydrogen Ion and Specific Conductance in Filtered Wet-Deposition Samples Stored at Ambient Temperature. Water, Air, and Soil Pollution, v. 79.

Vermette, S. J., Peden, M. E., Willoughby, T. C., Lindberg, S. E., and Weiss, D, 1995. Methodology for the sampling of Metals in Precipitation: Results of the National Atmospheric Deposition (NADP) Pilot Program. Atmospheric Environment Vol. 29, No. 11, pp. 1121-1129.


1994

Gordon, J.D., Nilles, M.A., and Schroder, L.J., 1994. Bias Correction factors Determined from External Blind Audit Results for Sulfate and Calcium: National Atmospheric Deposition Program, Technical Committee Meeting, October 24-27, Annapolis, MD.

Nilles, M.A., Gordon, J.D., and Schroder, L.J., 1994. External quality-assurance results for the National Atmospheric Deposition Program and National Trends Network during 1992: U.S. Geological Survey Water-Resources Investigations.

Nilles, M.A., Gordon, J.D. and Schroder, L.J., 1994. Trends in NADP/NTN Laboratory Bias Determined From an Examination of Certified Reference Sample Analyses, 1986-1994: National Atmospheric Deposition Program, Technical Committee Meeting, October 24-27, Annapolis, MD.

Nilles, M.A., and Gordon, J.D., 1994. Trends in NADP/NTN Bias Attributable to Sample Handling and Containers: in Proceedings National Atmospheric Deposition Program/Environmental Protection Agency Workshop on Trends Analysis, February 9-10, 1994, Research Triangle park, NC.


1993

Gordon, J.D., Nilles, M.A., and Schroder, L.J., 1993. Estimates of Bias Introduced During Shipping, Handling and Analysis of NADP/NTN Samples, 1982-1993: National Atmospheric Deposition Program, Technical Committee Meeting, November 15-18, Nashville, TN.

Lear, G., Simmons, C.S., and Nilles, M.A., 1993. Measurements from Collocated Sites: How Do They Compare for Monthly, Seasonal and Annual Summary Periods, National Atmospheric Deposition Program, Technical Committee Meeting, November 15-18, Nashville, TN.

Nilles, M.A., Gordon, J.D., and Schroder, L.J., 1993. External quality-assurance results for the National Atmospheric Deposition Program and National Trends Network during 1991: U.S. Geological Survey Water-Resources Investigations Report 93-4208.

Nilles, M.A., Schroder, L.J., and Gordon, J.D., 1993. Precision of wet-atmospheric-deposition-data determined with collocated samplers, Atmospheric Environment Vol. 28, No. 6, pp. 1121-1128.

Nilles, M.A., Gordon, J.D., and Schroder, L.J., 1993. A comparison of laboratory precision to total precision for a national precipitation chemistry network: 35th Rocky Mountain Conference on Analytical Chemistry, July 28, 1993, Denver CO.

Nilles, M.A., Gordon, J.D., and Schroder, L.J., 1993. A comparison of laboratory precision to overall precision for NADP/NTN data: National Atmospheric Deposition Program, Technical Committee Meeting, November 15-18, Nashville, TN.


1992

Gordon, J.D., Nilles, M.A., and Schroder, L.J., 1992. Bias in NADP/NTN analytical results due to shipping, handling, and processing of samples--1981-1992: National Atmospheric Deposition Program, Technical Committee Meeting, October 19-22, Cocoa Beach, FL.

Nilles, M.A., Gordon, J.D., Willoughby, T.C., and Schroder, L.J., 1992. External quality-assurance results for the National Atmospheric Deposition Program and National Trends Network during 1990: U.S. Geological Survey Water-Resources Investigations Report 92-4101.

Nilles, M.A., Gordon, J.D., and Schroder, L.J., 1992. Precision of NADP/NTN wet-atmospheric-deposition measurements determined with collocated samplers: National Atmospheric Deposition Program, Technical Committee Meeting, October 19-22, Cocoa Beach, FL.

Nilles, M.A., Schroder, L.J., and Gordon, J.D., 1992. Precision of wet-atmospheric-deposition-data determined with collocated samplers, October 1988-October 1991: 34th Rocky Mountain Conference on Analytical Chemistry, August 2-6, 1992.


1991

Willoughby, T.C., Gordon, J.D., Schroder, L.J., and Nilles, M.A., 1991. External quality-assurance results for the National Atmospheric Deposition Program and National Trends Network during 1989: U.S. Geological Survey Water-Resources Investigations Report 91-4039.

Nilles, M. A., See, R. B., Willoughby, T. C., and Gordon, J. D., 1991. Variability in wet atmospheric deposition data determined with collocated samplers: U.S. Geological Survey Water-Resources Investigations Report 91-4143.

Gordon, J.D., Willoughby, T.C., and Schroder, L.J., 1991. Summary of the intersite-comparison program: An external quality assurance study for the National Atmospheric Deposition Program/National Trends Network -- November 1978 through November 1989, U.S. Geological Survey Water-Resources Investigations Report 91-4061.

Willoughby, T. C., Nilles, M. A., Vermette, S. J., and Nelson, P. F., 1991. Modifications of precipitation samplers for the collection of trace elements in wet deposition: National Atmospheric Deposition Program, Technical Committee Meeting, October 7-10, Philadelphia, PA.


1990

Gordon, J.D., Schroder, L.J., and Willoughby, T.C., 1990. Application of Statistical Quality-Control Methods to an External Quality-Assurance Program of the National Atmospheric Deposition Program/National Trends Network: 32nd Rocky Mountain Conference, July 29 - August 3, 1990.

Gordon, J.D., Willoughby, T.C., and Schroder, L.J., 1990. Use of Three Dimensional Graphing techniques in the External Quality -Assurance Program of the National Atmospheric Deposition Program/National Trends Network: National Atmospheric Deposition Program, Technical Committee Meeting, October 29 - November 2, 1990, San Antonio, Texas.

Willoughby, T.C., Schroder, L.J., and See, R.B., 1990. Ionic stability of wet deposition samples sub-sampled daily for one week: U.S. Geological Survey Water-Resources Investigations Report 90-4003.

Willoughby, T.C., Schroder, L.J., and Gordon, J.D., 1990. Chemical stability of wet deposition samples sub-sampled daily for one week: 32nd Rocky Mountain Conference, July 29 - August 3, 1990.

See, R.B., Willoughby, T.C., and Brooks, M.H., 1990. Programs and analytical methods for the U.S. Geological Survey Acid Rain Quality Assurance Project: U.S. Geological Water-Resources Investigations Report 90-4029.

See, R.B., Gordon, J.D., and Willoughby, T.C., 1990. External quality-assurance results for the National Atmospheric Deposition Program and National Trends Network during 1988: U.S. Geological Survey Water-Resources Investigations Report 90-4030.


1989

Gordon, J.D., See, R.B., and Willoughby, T.C., 1989. Summary of the intersite-comparison program operated for the National Atmospheric Deposition Program and National Trends Network, November 1978-May 1989: National Atmospheric Deposition Program, Technical Committee Meeting, October 23-26, 1989, Provincetown, Mass.

Schroder, L.J., See, R.B., and Willoughby, T.C., 1989. Identification of the differences between on-site and laboratory pH determinations using a quality assurance program, U.S. Geological Survey Open File Report 89-409.

Schroder, L.J., See, R.B., and Willoughby, T.C., 1989. Identification of the differences between on-site and laboratory pH determinations using a quality assurance program, U.S. Geological Survey, 2nd National Symposium on Water Quality, November 12-17, 1989, Orlando, Florida.

See, R.B., Malo, B.A., Schroder, L.J., and Willoughby, T.C., 1989. Quality assurance for a precipitation monitoring network, U.S. Geological Survey, 2nd National Symposium on Water Quality, November 12-17, 1989, Orlando, Florida.

See, R.B., Willoughby, T.C., Gordon, J.D., and Schroder, L.J., 1989. Geographical and seasonal variations in the bias of blind-audit samples processed by the National Atmospheric Deposition Program and National Trends Network: 31st Rocky Mountain Conference, July 30-August 4, 1989, Denver, Colo.

See, R.B., Willoughby, T.C., Gordon, J.D., and Schroder, L.J., 1989. Geographical and seasonal variations in the bias of blind-audit samples processed by the National Atmospheric Deposition Program and National Trends Network: 31st Rocky Mountain Conference, July 30-August 4, 1989, Denver, Colo.

See, R.B., Willoughby, T.C., Schroder, L.J., and Gordon, J.D., 1989. A preliminary estimate of precision determined with collocated samples for the National Atmospheric Deposition Program and National Trends Network: National Atmospheric Deposition Program, Technical Committee Meeting, October 23-26, 1989, Provincetown, Mass.

See, R.B., Schroder, L.J., and Willoughby, T.C., 1989. External quality-assurance results for the National Atmospheric Deposition Program and National Trends Network during 1987: U.S. Geological Survey Water Resources Investigations Report 89-4015.

See, R.B., Schroder, L.J., and Willoughby, T.C., 1989. A quality assessment for analytes reported by the National Atmospheric Deposition Program and the National Trends Network: Atmospheric Environment, vol. 23, no. 8, p 1801-.

Willoughby, T.C., Schroder, L.J., and See, R.B., 1989. Summary of interlaboratory comparison program operated by the U.S. Geological Survey for the National Atmospheric Deposition Program and National Trends Network: National Atmospheric Deposition Program, Technical Committee Meeting, October 23-26, 1989, Provincetown, Mass.

Willoughby, T.C., and See, R.B., 1989. Summary of interlaboratory comparison results for the National Atmospheric Deposition Program and National Trends Network for 1983-87: 31st Rocky Mountain Conference, July 30-August 4, 1989, Denver, Colo.

Willoughby, T.C., See, R.B., and Schroder, L.J., 1989. Stability of nitrate-ion concentrations in simulated deposition samples used for quality-assurance activities by the U.S. Geological Survey: U.S. Geological Survey Water- Resources Investigations Report 89-4042.


1988

Graham, R.C., Robertson, J.K., Schroder, L.J., and Lafemia, J., 1988. Atmospheric deposition sampler intercomparison, Water, Air, and Soil Pollution.

Graham, R.C., Robertson, J.K., and Schroder, L.J., 1988. Atmospheric deposition monitoring-evaluation of validity of siting criteria: 30th Rocky Mountain Conference, August 1-4, 1988, Denver, CO.

See, R.B., Schroder, L.J., and Willoughby, T.C., 1988. External quality-assurance results for the National Atmospheric Deposition Program and the National Trends Network during 1986: U.S. Geological Survey Water Resources Investigations Report 88-4007.

Bigelow, D.S., Sisterson, D.L., and Schroder, L.J., 1988. An interpretation of differences between onsite and laboratory pH values reported by the National Atmospheric Deposition Program/National Trends Network Monitoring Program: Environmental Science and Technology, vol. 23, p. 881-887.

See, R.B., Schroder, L.J., and Willoughby, T.C., 1988. Results of external quality-assurance programs for the National Atmospheric Deposition Program and the National Trends Network during 1987: 30th Rocky Mountain Conference, August 1-4, 1988, Denver, CO.

See, R.B., Willoughby, T.C., and Schroder, L.J., 1988. Bias in analytical results reported by the National Atmospheric Deposition Program and National Trends Network: NADP Technical Committee Meeting, October 24-27, 1988, Champaign, IL.

Schroder, L.J., Willoughby, T.C., See, R.B., and Malo, B.A., 1988. The chemical composition of precipitation, dew and frost, and fog in Denver, Colorado: in Proceedings of the Baltimore Symposium, International Association of Hydrological Sciences, Third Scientific Assembly, May 10-19, 1989, Baltimore, Maryland, IAHS Publ. No. 179, p. 83-90.

Willoughby, T.C., See, R.B., and Schroder, L.J., 1988. Stability of wet-deposition samples collected weekly: 30th Rocky Mountain Conference, August 1-4, 1988, Denver, CO.


1987

Brooks, M.H., Schroder, L.J., and Willoughby, T.C., 1987. Interlaboratory comparability, bias, and precision for four laboratories measuring analytes in wet deposition, October 1983-December 1984: U.S. Geol. Surv. Water-Resources Investigations Report 87-4067.

Brooks, M.H., Schroder, L.J., and Willoughby, T.C., 1987. Results of external quality-assurance programs for the National Atmospheric Deposition Program and the National Trends Network during 1985: U.S. Geological Survey Water Resources Investigations Report 87-4219.

Schroder, L.J., Brooks, M.H., and Willoughby, T.C., 1987. Results of intercomparison studies for the measurement of pH and specific conductance at National Atmospheric Deposition Program/National Trends network monitoring sites, October 1981-October 1985: U.S. Geological Survey Water-Resources Investigations Report 86-4363, 22 p.

Brooks, M.H., Schroder, L.J., and Willoughby, T.C., 1987. Bias and precision of selected analytes reported by the National Atmospheric Deposition Program and National Trends Network -- 1984: U.S. Geological Survey Water-Resources Investigations Report 87-4050, 19 p.

Schroder, L.J., Brooks, M.H., Garbarino, J.R., and Willoughby, T.C., 1987. The influence of an urban environment in the chemical composition of precipitation, Averett, R. C. and McKnight, D. M., eds., in Chemical quality of water and the hydrologic cycle: Lewis, Chelsea, Michigan, p. 39-55.

Schroder, L.J., Graham, R.C., Robertson, J.K., and Obal, J., 1987. Comparison of collection efficiencies and chemical concentrations from collocated precipitation samplers: 29th Rocky Mountain Conference, August 2-6, 1987, Denver, CO.

Schroder, L.J., and Malo, B.A., 1987. Quality-assurance/quality-control aspects of precipitation monitoring: in Transactions of the 80th Annual Meeting of Air Pollution Control Association, New York, New York, June 21-26, 10 p.

Willoughby, T.C., See, R.B., and Schroder, L.J., 1987. Quality-Assurance of the U.S. Geological Survey in support of the National Atmospheric Deposition Program and National Trends Network: NADP Technical Committee Meeting, November 2-5, 1987, Minneapolis, MN.


1986

Brooks, M.H., Schroder, L.J., and Willoughby, T.C., 1986. A quality-assurance program for the National Atmospheric Deposition Program and National Trends Network: 28th Rocky Mountain Conference, August 3-7, 1986, Denver, CO.

Brooks, M.H., Morden-Moore, A.L., Schroder, L.J.., and Stensland, G.J., 1986. Evidence for positive bias in the NADP Technical Committee Meeting, October 27-31, 1986, Atlanta, GA.

Fishman, M.J., Schroder, L.J., and Shockey, M.W., 1986. Evaluation of methods for preservation of water samples for nutrient analysis: Intern. J. Environmental Studies, v. 26, pp. 231-238.

Schroder, L.J., Malo, B.A., and Scott, C.T., 1986. An automatic-multicylinder splitter for the simultaneous collection and preservation of wet atmospheric deposition: 7th World Clean Air Congress and Exhibition, August 25-29, 1986, Sydney, Australia.

Schroder, L.J., Brooks, M.H., Malo, B.A., and Willoughby, T.C., 1986. Quality-assurance results for field pH and specific-conductance measurements, and for laboratory analysis; National Atmospheric Deposition Program and National Trends Network--January 1980 - September 1984: U. S. Geological Survey Water-Resources Investigations Report 86-4139, 32 p.

Schroder, L.J., and Hedley, A.G., 1986. Variation in precipitation quality during a 40-hour snowstorm in an urban environment-Denver, Colorado: Intern. J. Environ. Studies, v. 28, pp. 131-138.

Schroder, L.J., Brooks, M.H., Garbarino, J.R., and Willoughby, T.C., 1986. A short study of the influence of an urban area on the composition of precipitation: 8th Rocky Mountain Regional Meeting, American Chemical Society, June 8-12, Denver, Colorado.


1985

Brooks, M.H., Schroder, L.J., and Willoughby, T.C., 1985. Quality-Assurance activities of the U.S. Geological Survey in support of the National Atmospheric Deposition Program and National Trends Network: NADP Technical Committee Meeting, October 8-11, 1985, Fort Collins, CO.

Schroder, L.J., Malo, B.A., and Scott, C.T., 1985. An automatic-multicylinder splitter for the collection of wet-atmospheric deposition: 27th Rocky Mountain Conference, July 1985, Denver, CO.

Schroder, L. J., and Bricker, A. W., 1985. Preparation of polyethylene sacks for collection of precipitation samples for trace-metal analysis: U.S. Geological Survey Water-Resources Investigations Report 85-1636, 18 p.

Schroder, L.J., Linthurst, R.A., Ellson, J.E., and Vozzo, S.F., 1985. Comparison of daily and weekly precipitation sampling efficiencies using automatic collectors: Water, Air, and Soil Pollution, v. 24, No. 562, pp. 177-187.

Schroder, L.J., Bricker, A.W., and Willoughby, T.C., 1985. Precision and bias of selected analytes reported by the National Atmospheric Deposition Program and National Trends Network - 1983 and January 1980 through September, 1984: U.S. Geological Survey Water-Resources Investigations Report 85-4275, 20 p.

Brooks, M.H., Schroder, L.J., and Malo, B.A., 1985. Interlaboratory comparability, bias, and precision for four laboratories measuring constituents in precipitation, November 1982 - August, 1983: U.S. Geological Survey Water-Resources Investigations Report 85-4313, 20 p.


1984

Good, A.B., and Schroder, L.J., 1984. Evaluation of metal ion absorptive characteristics of three types of plastic sample bags used for precipitation sampling: Journal of Environmental Science and Health, part A, v. 19, No. 5, p. 631-640.

Schroder, L.J., and Delmendo, L.A., 1984. Comparison of data for major ion analytes in precipitation--Canadian Atmospheric Pollution Monitoring Network and National Atmospheric Deposition Program: 26th Rocky Mountain Conference, August 1984, Denver, CO.

Schroder, L.J., and Malo, B.A., 1984. Quality Assurance Program for wet-deposition sampling and chemical analyses for the National Trends Network: in Proceedings of the Specialty Conference, Quality Assurance in Air Pollution Measurements, Air Pollution Control Association, Boulder, Colorado, October 14-18, pp. 254-261.

Schroder, L.J., and Brennan, J.O., 1984. Precision of the measurement of pH and specific conductance at National Atmospheric Deposition Program monitoring sites, October 1981-November 1983: U.S. Geological Survey Water-Resources Investigations Report 84-4325, 11 p.


1983

Schroder, L.J., Reddy, M.M., and Good, A.B., 1983. Chemical analysis of dew and frost collection near Denver, Colorado: 25th Rocky Mountain Conference, August 1983, Denver, CO.


1982

Schroder, L.J., 1982. Quality Assurance of the NADP Central Analytical Laboratory using simulated precipitation samples: Symposium on Acid-precipitation: A Western perspective, June 1982, Bellingham, WA.

Schroder, L.J., and Hedley, A.H., 1982. Sequential sampling of storm precipitation in Denver, Colorado: 24th Rocky Mountain Conference, August 1982, Denver, CO.

Schroder, L.J., and Linthurst, R.A., 1982. Comparison of storm and weekly composite precipitation samples at Raleigh, North Carolina: 24th Rocky Mountain Conference, August 1982, Denver, CO.


1980

Bonelli, J.E., Schroder, L.J., Skogerboe, R.K., and Taylor, H.E., 1980. Thallium identification in selected atmospheric deposition samples: Atmospheric Environment, v. 14, pp 867-870.

Schroder, L.J., and Linthurst, R.A., 1982. Comparison of storm and weekly composite precipitation samples at Raleigh, North Carolina: 24th Rocky Mountain Conference, August 1982, Denver, CO.




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