id,agency_id,docket_id,title,document_type,subtype,posted_date,posted_year,posted_month,comment_start_date,comment_end_date,last_modified,fr_doc_num,open_for_comment,withdrawn,object_id
EPA-HQ-OAR-2014-0128-0509,EPA,EPA-HQ-OAR-2014-0128,"Clark, C. M., Simkin, S. M., Allen, E. B., Bowman, W. D., Belnap, J., Brooks, M. L., Collins, S. L., Geiser, L. H., Jovan, S. E., Pardo, L. H., Schulz, B. K., Stevens, C. J., Suding, K. N., Throop, H. L., & Waller, D. M. (2019) Potential vulnerability of 348 herbaceous species to atmospheric deposition of nitrogen and sulfur in the United States. Nature Plants, 5(7), 697-705.",Supporting & Related Material,Publication - USEPA,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:34:26Z,,0,0,090000648682a8ed
EPA-HQ-OAR-2014-0128-0517,EPA,EPA-HQ-OAR-2014-0128,"R Core Team (2024). R: A Language and Environment for Statistical Computing. R Foundation for Statistical Computing, Vienna, Austria. <https://www.R-project.org/>",Supporting & Related Material,Publication,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:37:10Z,,0,0,090000648682a8fa
EPA-HQ-OAR-2014-0128-0523,EPA,EPA-HQ-OAR-2014-0128,Total Deposition Estimates Using the Measurement Model Fusion (TDep MMF version 2023.01) Approach with Modeled and Monitoring Data,Supporting & Related Material,Fact/Data Sheet,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:38:55Z,,0,0,090000648682b10d
EPA-HQ-OAR-2014-0128-0504,EPA,EPA-HQ-OAR-2014-0128,"Burns, D. A., Bhatt, G., Linker, L. C., Bash, J. O., Capel, P. D., & Shenk, G. W. (2021). Atmospheric nitrogen deposition in the Chesapeake Bay watershed: A history of change. Atmospheric Environment, 251, 118277",Supporting & Related Material,Publication - Copyrighted Materials,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:34:39Z,,0,0,090000648682a8e8
EPA-HQ-OAR-2014-0128-0526,EPA,EPA-HQ-OAR-2014-0128,Miscellaneous data files for presentations in Additional Technical Analyses of Air Quality and Deposition Estimates,Supporting & Related Material,Data,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:33:48Z,,0,0,090000648682cf1a
EPA-HQ-OAR-2014-0128-0502,EPA,EPA-HQ-OAR-2014-0128,EPA clean air status and trends network 2017 annual report,Supporting & Related Material,Report,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:35:17Z,,0,0,090000648682a8e6
EPA-HQ-OAR-2014-0128-0506,EPA,EPA-HQ-OAR-2014-0128,"Hennigan, CJ, Sandholm, S, Kim, S, Stickel, RE, Huey, LG and Weber, RJ (2006). Influence of Ohio River valley emissions on fine particle sulfate measured from aircraft over large regions of the eastern United States and Canada during INTEX‐NA. J Geophys Res Atmos 111: D24.",Supporting & Related Material,Publication - Copyrighted Materials,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:34:01Z,,0,0,090000648682a8ea
EPA-HQ-OAR-2014-0128-0520,EPA,EPA-HQ-OAR-2014-0128,"Zheng, X. D., Liu, X. Y., Song, W., Sun, X. C., & Liu, C. Q. (2018). Nitrogen isotope variations of ammonium across rain events: Implications for different scavenging between ammonia and particulate ammonium. Environmental Pollution, 239, 392-398",Supporting & Related Material,Publication - Copyrighted Materials,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:38:16Z,,0,0,090000648682b10a
EPA-HQ-OAR-2014-0128-0514,EPA,EPA-HQ-OAR-2014-0128,"Malm, W. C., Schichtel, B., Molenar, J., Prenni, A., & Peters, M. (2019). Which visibility indicators best represent a population’s preference for a level of visual air quality? Journal of the Air & Waste Management Association, 69(2), 145-161",Supporting & Related Material,Publication - Copyrighted Materials,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:36:33Z,,0,0,090000648682a8f7
EPA-HQ-OAR-2014-0128-0530,EPA,EPA-HQ-OAR-2014-0128,"Memorandum to the Docket - Endangered Species Act No Effect Finding for Final Rulemaking on Secondary NAAQS for SO2, NO2, and PM",Supporting & Related Material,Memorandum,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:32:40Z,,0,0,090000648684ab5a
EPA-HQ-OAR-2014-0128-0497,EPA,EPA-HQ-OAR-2014-0128,"Review of the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen, Oxides of Sulfur, and Particulate Matter",Rule,Final Rule,2024-12-27T05:00:00Z,2024,12,2024-12-27T05:00:00Z,,2024-12-28T01:32:13Z,2024-29463,0,0,090000648689130d
EPA-HQ-OAR-2014-0128-0498,EPA,EPA-HQ-OAR-2014-0128,Chesapeake Bay TMDL Document (2010): Sections and Appendices. More information can be found at: https://www.epa.gov/chesapeake-bay-tmdl/chesapeake-bay-tmdl-document,Supporting & Related Material,Report,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:33:33Z,,0,0,09000064867e9d90
EPA-HQ-OAR-2014-0128-0501,EPA,EPA-HQ-OAR-2014-0128,"Åkerblom, S., Nilsson, M. B., Skyllberg, U., Björn, E., Jonsson, S., Ranneby, B., & Bishop, K. (2020). Formation and mobilization of methylmercury across natural and experimental sulfur deposition gradients. Environmental Pollution, 263, 114398.",Supporting & Related Material,Publication,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:35:04Z,,0,0,090000648682a8e5
EPA-HQ-OAR-2014-0128-0500,EPA,EPA-HQ-OAR-2014-0128,"Altshuller, AP (1976). Regional transport and transformation of sulfur dioxide to sulfates in the United States. J Air Poll Contr Assoc 26: 318-324.",Supporting & Related Material,Publication - Copyrighted Materials,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:37:50Z,,0,0,090000648682acc6
EPA-HQ-OAR-2014-0128-0503,EPA,EPA-HQ-OAR-2014-0128,"Burns, D. A., McDonnell, T. C., Rice, K. C., Lawrence, G. B., & Sullivan, T. J. (2020). Chronic and episodic acidification of streams along the Appalachian Trail corridor, eastern United States. Hydrological Processes, 34(7), 1498-1513",Supporting & Related Material,Publication,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:39:32Z,,0,0,090000648682a8e7
EPA-HQ-OAR-2014-0128-0510,EPA,EPA-HQ-OAR-2014-0128,"Geiser, L. H., Root, H., Smith, R. J., Jovan, S. E., St Clair, L., & Dillman, K. L. (2021). Lichen-based critical loads for deposition of nitrogen and sulfur in US forests. Environmental Pollution, 291, 118187",Supporting & Related Material,Publication,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:36:08Z,,0,0,090000648682a8ee
EPA-HQ-OAR-2014-0128-0519,EPA,EPA-HQ-OAR-2014-0128,"U.S. EPA (2024). Memorandum to Secondary NOX/SOX/PM NAAQS Review Docket (EPA-HQ-OAR-2014-0128). Air Quality Analysis Using Sulfur Dioxide (SO2) Air Quality Data, Updated. October 21, 2024. Office of Air Quality Planning and Standards, Research Triangle Park, NC",Supporting & Related Material,Memorandum,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:38:03Z,,0,0,090000648682b109
EPA-HQ-OAR-2014-0128-0515,EPA,EPA-HQ-OAR-2014-0128,"National Atmospheric Deposition Program (NADP), 2023. Total Deposition Maps, version 2023.01. Available at: https://nadp.slh.wisc.edu/committees/tdep/",Supporting & Related Material,Publication,2024-12-27T05:00:00Z,2024,12,,,2025-07-08T19:37:58Z,,0,0,090000648682a8f8
EPA-HQ-OAR-2014-0128-0512,EPA,EPA-HQ-OAR-2014-0128,"McEachran, A. D., Blackwell, B. R., Hanson, J. D., Wooten, K. J., Mayer, G. D., Cox, S. B., & Smith, P. N. (2015). Antibiotics, bacteria, and antibiotic resistance genes: aerial transport from cattle feed yards via particulate matter. Environmental health perspectives, 123(4), 337-343",Supporting & Related Material,Publication,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:36:21Z,,0,0,090000648682a8f5
EPA-HQ-OAR-2014-0128-0524,EPA,EPA-HQ-OAR-2014-0128,"Stein, AF, Draxler, RR, Rolph, GD, Stunder, BJB, Cohen, MD and Ngan, F (2015). NOAA’s HYSPLIT atmospheric transport and dispersion modeling system. Bull Amer Meteor Soc 96: 2059-2077",Supporting & Related Material,Publication - Copyrighted Materials,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:39:07Z,,0,0,090000648682b10e
EPA-HQ-OAR-2014-0128-0528,EPA,EPA-HQ-OAR-2014-0128,TDep v2023_01 File Information -SO2NO2PM - Subset of TDep Data Files described in the Additional Technical Analyses of Air Quality and Deposition Estimates,Supporting & Related Material,Data,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:37:36Z,,0,0,090000648682cea8
EPA-HQ-OAR-2014-0128-0522,EPA,EPA-HQ-OAR-2014-0128,"Yu, X. Y., Lee, T., Ayres, B., Kreidenweis, S. M., Malm, W., & Collett Jr, J. L. (2006). Loss of fine particle ammonium from denuded nylon filters. Atmospheric Environment, 40(25), 4797-4807",Supporting & Related Material,Publication - Copyrighted Materials,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:38:42Z,,0,0,090000648682b10c
EPA-HQ-OAR-2014-0128-0511,EPA,EPA-HQ-OAR-2014-0128,"Campbell, P. C., Bash, J. O., Nolte, C. G., Spero, T. L., Cooter, E. J., Hinson, K., & Linker, L. C. (2019). Projections of atmospheric nitrogen deposition to the Chesapeake Bay watershed. Journal of Geophysical Research: Biogeosciences, 124(11), 3307-3326",Supporting & Related Material,Publication - Other Governmental,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:34:52Z,,0,0,090000648682a8f4
EPA-HQ-OAR-2014-0128-0531,EPA,EPA-HQ-OAR-2014-0128,OMB EO 12866 Review Conclusion RE NOx SOx PM Secondary NAAQS NFR and RTC Revisions,Supporting & Related Material,Interagency Review,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:32:54Z,,0,0,090000648684b73f
EPA-HQ-OAR-2014-0128-0534,EPA,EPA-HQ-OAR-2014-0128,EO 12866 Review RE Secondary NAAQS - 1st round comments,Supporting & Related Material,Interagency Review,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:39:58Z,,0,0,090000648684bbe4
EPA-HQ-OAR-2014-0128-0533,EPA,EPA-HQ-OAR-2014-0128,EO 12866 RE_ Secondary NAAQS - DOJ comments meeting 11 12 24,Supporting & Related Material,E-mail,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:32:26Z,,0,0,090000648684bbb2
EPA-HQ-OAR-2014-0128-0525,EPA,EPA-HQ-OAR-2014-0128,"Sales, R, Elizalde, C, Smith, T, Baublitz, C, and Evangelista, M (2024). Memorandum to Secondary NOX/SOX/PM NAAQS Review Docket (EPA-HQ-OAR-2014-0128). Additional Technical Analyses of Air Quality and Deposition Estimates. September 24, 2024. Office of Air Quality Planning and Standards, Research Triangle Park, NC",Supporting & Related Material,Memorandum,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:39:20Z,,0,0,090000648682b10f
EPA-HQ-OAR-2014-0128-0499,EPA,EPA-HQ-OAR-2014-0128,"Weaver, C (2024). Memorandum to Secondary NOX/SOX/PM NAAQS Review Docket. List of Studies Identified by Public Commenters that have been Provisionally Considered in the Context of Conclusions of the 2020 ISA for Secondary NAAQS Review of Oxides of Nitrogen, Oxides of Sulfur and PM. Oct 16, 24, ORD, RTP, NC",Supporting & Related Material,Memorandum,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:39:45Z,,0,0,090000648682a8d4
EPA-HQ-OAR-2014-0128-0507,EPA,EPA-HQ-OAR-2014-0128,"Lv, S., Wang, F., Wu, C., Chen, Y., Liu, S., Zhang, S., Li, D., Du, W., Zhang, F., Wang, H., & Wang, G. (2022). Gas-to-aerosol phase partitioning of atmospheric water-soluble organic compounds at a rural site in China: an enhancing effect of NH3 on SOA formation. Environmental Science & Technology, 56(7), 3915-3924.",Supporting & Related Material,Publication - Copyrighted Materials,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:35:42Z,,0,0,090000648682a8eb
EPA-HQ-OAR-2014-0128-0513,EPA,EPA-HQ-OAR-2014-0128,"Policy Assessment for the Review of the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen, Oxides of Sulfur and Particulate Matter (2024)- Errata, as amended October 21 2024",Supporting & Related Material,Report,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:34:14Z,,0,0,090000648682a8f6
EPA-HQ-OAR-2014-0128-0518,EPA,EPA-HQ-OAR-2014-0128,"Nelson, S. J., Willacker, J., Eagles-Smith, C., Pritz, C. F., Chen, C. Y., Klemmer, A., & Krabbenhoft, D. P. (2024). Habitat and dissolved organic carbon modulate variation in the biogeochemical drivers of mercury bioaccumulation in dragonfly larvae at the national scale. Science of the Total Environment, 912, 169396",Supporting & Related Material,Publication - Copyrighted Materials,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:33:07Z,,0,0,090000648682a8fb
EPA-HQ-OAR-2014-0128-0532,EPA,EPA-HQ-OAR-2014-0128,EO 12866 RE Interagency briefing - Secondary NAAQS 2060-AS35 11 4 2024a,Supporting & Related Material,Interagency Review,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:40:11Z,,0,0,090000648684bbab
EPA-HQ-OAR-2014-0128-0527,EPA,EPA-HQ-OAR-2014-0128,"TDep v2021 01 File Information -SO2NO2PM - Additional TDep version referenced in the PA, used to calculate the PA estimate of change in the CONUS average N deposition between 2000-2002 and 2018-2020 which was based on the TDep version available in 2022 (v2021.01)",Supporting & Related Material,Data,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:37:23Z,,0,0,090000648682cea7
EPA-HQ-OAR-2014-0128-0508,EPA,EPA-HQ-OAR-2014-0128,"Lawrence, C. E., Casson, P., Brandt, R., Schwab, J. J., Dukett, J. E., Snyder, P., Yerger, E., Kelting, D., VandenBoer, T.C., & Lance, S. (2023). Long-term monitoring of cloud water chemistry at Whiteface Mountain: the emergence of a new chemical regime. Atmospheric Chemistry and Physics, 23(2), 1619-1639",Supporting & Related Material,Publication,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:35:55Z,,0,0,090000648682a8ec
EPA-HQ-OAR-2014-0128-0516,EPA,EPA-HQ-OAR-2014-0128,"Rogers, Christopher., Mishoe, Kevin, Stewart, Marcus, Barry, Katherine, Rice, Joann, Chen, Xi, Walker, John, Puchaliski, Melissa, Baumgardner, Ralph, and Schichtel, Bret (2020). Summary Report: Improving characterization of reduced nitrogen at IMPROVE and CSN monitoring sites",Supporting & Related Material,Report,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:36:58Z,,0,0,090000648682a8f9
EPA-HQ-OAR-2014-0128-0521,EPA,EPA-HQ-OAR-2014-0128,"Sheibley, R. W., Enache, M., Swarzenski, P. W., Moran, P. W., & Foreman, J. R. (2014). Nitrogen deposition effects on diatom communities in lakes from three national parks in Washington State. Water, Air, & Soil Pollution, 225, 1-23",Supporting & Related Material,Publication,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:38:29Z,,0,0,090000648682b10b
EPA-HQ-OAR-2014-0128-0505,EPA,EPA-HQ-OAR-2014-0128,"Baker, J., Battye, W. H., Robarge, W., Arya, S. P., & Aneja, V. P. (2020). Modeling and measurements of ammonia from poultry operations: Their emissions, transport, and deposition in the Chesapeake Bay. Science of the Total Environment, 706, 135290",Supporting & Related Material,Publication - Copyrighted Materials,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:35:29Z,,0,0,090000648682a8e9
EPA-HQ-OAR-2014-0128-0529,EPA,EPA-HQ-OAR-2014-0128,"Response to Comments Document on the 2024 Proposed Action re: Secondary National Ambient Air Quality Standards for Oxides of Nitrogen, Oxides of Sulfur and Particulate Matter",Supporting & Related Material,Comment Response,2024-12-27T05:00:00Z,2024,12,,,2024-12-28T01:40:24Z,,0,0,090000648684ab59
EPA-HQ-OAR-2014-0128-0457,EPA,EPA-HQ-OAR-2014-0128,"Public Hearing Transcript May 8, 2024 for NAAQS FOR NO2 SO2 PM",Supporting & Related Material,"Public Hearing Transcript, Deposition, Testimony",2024-06-17T04:00:00Z,2024,6,,,2024-06-18T00:33:22Z,,0,0,090000648659a60a
EPA-HQ-OAR-2014-0128-0433,EPA,EPA-HQ-OAR-2014-0128,NOxSOxPM Secondary Tribal Consultation Offer Letter 4 11 24 Signed,Supporting & Related Material,Letter,2024-05-13T04:00:00Z,2024,5,,,2024-05-14T00:36:08Z,,0,0,09000064864de300
EPA-HQ-OAR-2014-0128-0203,EPA,EPA-HQ-OAR-2014-0128,"Laughner, JL and Cohen, RC (2019). Direct Observation of Changing NOx Lifetime in North American Cities. Science 366: 723-727",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:39:39Z,,0,0,09000064864b6d29
EPA-HQ-OAR-2014-0128-0419,EPA,EPA-HQ-OAR-2014-0128,"U.S. EPA (2009). Integrated Science Assessment for Particulate Matter. Office of Research and Development, Research Triangle Park, NC. EPA/600/R-08/139F. December 2009.",Supporting & Related Material,Publication - USEPA,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:45:04Z,,0,0,09000064864c2a80
EPA-HQ-OAR-2014-0128-0217,EPA,EPA-HQ-OAR-2014-0128,"Malm, WC, Schichtel, BA and Pitchford, ML (2011). Uncertainties in PM 2.5 Gravimetric and Speciation Measurements and What We Can Learn from Them. J Air Waste Manag Assoc 61(11): 1131-1149",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:46:06Z,,0,0,09000064864b6d8f
EPA-HQ-OAR-2014-0128-0120,EPA,EPA-HQ-OAR-2014-0128,"Cosby et al 2006 Acidic Deposition Impacts on Natural Resources in Shenandoah National Park. Technical Report NPS/NER/NRTR - 2006-066. United States Department of the Interior, National Park Service, Northeast Region.",Supporting & Related Material,Publication - Other Governmental,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:52:52Z,,0,0,09000064864b6427
EPA-HQ-OAR-2014-0128-0079,EPA,EPA-HQ-OAR-2014-0128,"Bobbink, R, Ashmore, M, Braun, S, Flückiger, W and Van den Wyngaert, IJJ (2003). Empirical Critical Loads for Nitrogen: Empirical nitrogen critical loads for natural and semi-natural ecosystems: 2002 update. Swiss Agency for Environment, Forest and Landscape SAEFL. Berne, Switzerland",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:34:41Z,,0,0,090000648649c3e5
EPA-HQ-OAR-2014-0128-0302,EPA,EPA-HQ-OAR-2014-0128,"Sullivan et al 2012 Target Loads of Atmospheric Sulfur and Nitrogen Deposition for Protection of Acid Sensitive Aquatic Resources in the Adirondack Mountains, New York. Water Resour Res 48(1): W01547.",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:35:41Z,,0,0,09000064864c26ca
EPA-HQ-OAR-2014-0128-0407,EPA,EPA-HQ-OAR-2014-0128,"Sullivan, TJ, Cosby, BJ, McDonnell, TC, Porter, EM, Blett, T, Haeuber, R, Huber, CM and Lynch, J (2012). Critical loads of acidity to protect and restore acid-sensitive streams in Virginia and West Virginia. Water Air Soil Pollut 223: 5759-5771.",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:37:40Z,,0,0,09000064864c3932
EPA-HQ-OAR-2014-0128-0384,EPA,EPA-HQ-OAR-2014-0128,"Sutherland, JW, Acker, FW, Bloomfield, JA, Boylen, CW, Charles, DF, Daniels, RA, Eichler, LW, Farrell, JL, Feranec, RS, Hare, MP, Kanfoush, SL, Preall, RJ, Quinn, SO, Rowell, HC, Schoch, WF, Shaw, WH, Siegfried, CA, Sullivan, TJ, Winkler, DA and Nierzwicki-Bauer, SA (2015). Brooktrout lake case study: Biotic recovery from acid deposition 20 years after the 1990 clean air act amendments.",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:37:04Z,,0,0,09000064864c392b
EPA-HQ-OAR-2014-0128-0040,EPA,EPA-HQ-OAR-2014-0128,Ambient Air SO2 Monitoring Network Review and Background (January 2024),Supporting & Related Material,Memorandum,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:50:10Z,,0,0,090000648649b4c2
EPA-HQ-OAR-2014-0128-0044,EPA,EPA-HQ-OAR-2014-0128,"Lebo, ME, Paerl, HW and Peierls, BL. (2012). Evaluation of progress in achieving TMDL mandated nitrogen reductions in the Neuse River Basin, North Carolina. Environ Manage 49: 253-266",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:52:51Z,,0,0,090000648649b4c6
EPA-HQ-OAR-2014-0128-0047,EPA,EPA-HQ-OAR-2014-0128,"U.S. EPA (2020). Policy Assessment for the Review of the National Ambient Air Quality Standards for Particulate Matter. Office of Air Quality Planning and Standards, Research Triangle Park, NC. EPA-452/R-20-002. January 2020",Supporting & Related Material,Publication - USEPA,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:53:16Z,,0,0,090000648649b4c9
EPA-HQ-OAR-2014-0128-0196,EPA,EPA-HQ-OAR-2014-0128,"Lacoul, P, Freedman, B and Clair, T (2011). Effects of Acidification on Aquatic Biota in Atlantic Canada. Environ Rev 19: 429-460",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:48:31Z,,0,0,09000064864b6d22
EPA-HQ-OAR-2014-0128-0236,EPA,EPA-HQ-OAR-2014-0128,"Neff et al 2008, Episodic stream acidification in the Great Smoky mountains national park: An investigation into the mechanisms of acidification and impacts on native brook trout. World Environ Water Resour Congr 2008: Ahupua'a 1-10",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:55:52Z,,0,0,09000064864c0455
EPA-HQ-OAR-2014-0128-0233,EPA,EPA-HQ-OAR-2014-0128,"Mulcahy et al. 2020, Description and evaluation of aerosol in UKESM1 and HadGEM3-GC3.1 CMIP6 historical simulations. Geosci Model Dev 13: 6383-6423.",Supporting & Related Material,Publication,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:55:29Z,,0,0,09000064864c085f
EPA-HQ-OAR-2014-0128-0366,EPA,EPA-HQ-OAR-2014-0128,"Zhang, L, Vet, R, O’Brien, JM, Mihele, C, Liang, Z and Wiebe, A (2009). Dry deposition of individual nitrogen species at eight Canadian rural sites. J Geophys Res – Atmos, 114: D02301",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:50:34Z,,0,0,09000064864c2b93
EPA-HQ-OAR-2014-0128-0345,EPA,EPA-HQ-OAR-2014-0128,"Vitousek, PM and Reiners, WA (1975). Ecosystem succession and nutrient retention: a hypothesis. BioScience 25:376-381",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:43:25Z,,0,0,09000064864c2b6e
EPA-HQ-OAR-2014-0128-0391,EPA,EPA-HQ-OAR-2014-0128,"Sullivan et al 2003 Assessment of air quality and related values in Shenandoah National Park. Technical Report NPS/NERCHAL/NRTR-03/090. United States Department of the Interior, National Park Service, Northeast Region",Supporting & Related Material,Report,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:38:09Z,,0,0,09000064864c3934
EPA-HQ-OAR-2014-0128-0090,EPA,EPA-HQ-OAR-2014-0128,"Lichens as Bioindicators of Air Quality: Identification of sensitive species. General Technical Report RM-224. United States Department of Agriculture, US Forest Service, Rocky Mountain Forest and Range Experimental Station.",Supporting & Related Material,Publication - Other Governmental,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:35:16Z,,0,0,090000648649c3f0
EPA-HQ-OAR-2014-0128-0331,EPA,EPA-HQ-OAR-2014-0128,"U.S. EPA (2023). National Emissions Inventory Technical Support Document. Office of Air Quality Planning and Standards, Research Triangle Park, NC. EPA-454/R-23-001b. March 2023.",Supporting & Related Material,Publication - USEPA,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:40:46Z,,0,0,09000064864c2a84
EPA-HQ-OAR-2014-0128-0230,EPA,EPA-HQ-OAR-2014-0128,"McNulty, SG, Cohen, EC, Myers, JAM, Sullivan, TJ and Li, H (2007). Estimates of critical acid loads and exceedances for forest soils across the conterminous United States. Environ Pollut 149: 281-292.",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:52:15Z,,0,0,09000064864c085c
EPA-HQ-OAR-2014-0128-0234,EPA,EPA-HQ-OAR-2014-0128,"Miller, EK (2011). Steady-State Critical Loads and Exceedance for Terrestrial and Aquatic Ecosystems in the Northeastern United States. National Park Service Multi-Agency Critical Loads Project - Technical Report.",Supporting & Related Material,Report,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:55:40Z,,0,0,09000064864c0860
EPA-HQ-OAR-2014-0128-0371,EPA,EPA-HQ-OAR-2014-0128,"Zhang, Y, Mathur, R, Bash, JO, Hogrefe, C, Xing, J and Roselle, SJ (2018). Long-term Trends in Total Inorganic Nitrogen and Sulfur Deposition in the U.S. from 1990 to 2010. Atmos Chem Phys 18:9091-9106",Supporting & Related Material,Publication,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:48:18Z,,0,0,09000064864c2b98
EPA-HQ-OAR-2014-0128-0404,EPA,EPA-HQ-OAR-2014-0128,"Simkin, SM, Allen, EB, Bowman, WD, Clark, CM, Belnap, J, Brooks, ML, Cade, BS, Collins, SL, Geiser, LH, Gilliam, FS and Jovan, SE (2016). Conditional vulnerability of plant diversity to atmospheric nitrogen deposition across the United States. Proc Natl Acad Sci 113(15): 4086-4091",Supporting & Related Material,Publication,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:00:12Z,,0,0,09000064864c3907
EPA-HQ-OAR-2014-0128-0065,EPA,EPA-HQ-OAR-2014-0128,"Allen et al 2009 The Mojave Desert: Ecosystem Processes and Sustainability: Impacts of atmospheric nitrogen deposition on vegetation and soils at Joshua Tree National Park. University of Nevada Press. Las Vegas, NV.",Supporting & Related Material,Publication,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:36:42Z,,0,0,090000648649c38b
EPA-HQ-OAR-2014-0128-0083,EPA,EPA-HQ-OAR-2014-0128,"Bowman, WD, Murgel, J, Blett, T and Porter, E (2012). Nitrogen critical loads for alpine vegetation and soils in Rocky Mountain National Park. J Environ Manage 103: 165-171.",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:34:16Z,,0,0,090000648649c3e9
EPA-HQ-OAR-2014-0128-0254,EPA,EPA-HQ-OAR-2014-0128,"Povak et al 2014, Machine learning and linear regression models to predict catchment- level base cation weathering rates across the southern Appalachian Mountain region, USA. Water Resour Res 50(4): 2798-2814",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:39:45Z,,0,0,09000064864c24b0
EPA-HQ-OAR-2014-0128-0229,EPA,EPA-HQ-OAR-2014-0128,"Moore, JD and Houle, D. (2013). Soil and sugar maple response to 8 years of NH4NO3 additions in a base-poor northern hardwood forest. For Ecol Manage 310: 167-172.",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:52:02Z,,0,0,09000064864c085b
EPA-HQ-OAR-2014-0128-0426,EPA,EPA-HQ-OAR-2014-0128,"Warner, JX, Wei, Z, Strow, LL, Dickerson, RR and Nowak, JB (2016). The global tropospheric ammonia distribution as seen in the 13-year AIRS measurement record. Atmos Chem Phys 16(8): 5467-5479",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:46:54Z,,0,0,09000064864c2b89
EPA-HQ-OAR-2014-0128-0367,EPA,EPA-HQ-OAR-2014-0128,"Yu, F, Nair, AA and Luo, G (2018). Long‐Term Trend of Gaseous Ammonia Over the United States: Modeling and Comparison with Observations. J Geophys Res Atmos 123(15): 8315-8325.",Supporting & Related Material,Publication,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:47:29Z,,0,0,09000064864c2b94
EPA-HQ-OAR-2014-0128-0427,EPA,EPA-HQ-OAR-2014-0128,"Soulé, PT (2011). Changing climate, atmospheric composition, and radial tree growth in a spruce-fir ecosystem on Grandfather Mountain, North Carolina. Nat Areas J 31: 65-74.",Supporting & Related Material,Publication,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:00:23Z,,0,0,09000064864c3908
EPA-HQ-OAR-2014-0128-0051,EPA,EPA-HQ-OAR-2014-0128,"U.S. EPA (2017). Integrated Review Plan for the Secondary NAAQS for Oxides of Nitrogen and Oxides of Sulfur and Particulate Matter – Final. Office of Air Quality Planning and Standards, Research Triangle Park, NC. EPA-452/R-17-002. January 2017",Supporting & Related Material,Publication - USEPA,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:32:18Z,,0,0,090000648649c257
EPA-HQ-OAR-2014-0128-0053,EPA,EPA-HQ-OAR-2014-0128,"U.S. EPA (2015). Draft Integrated Review Plan for the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen and Oxides of Sulfur. Office of Air Quality Planning and Standards, Research Triangle Park, NC. October 2015",Supporting & Related Material,Interagency Review,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:32:30Z,,0,0,090000648649c259
EPA-HQ-OAR-2014-0128-0415,EPA,EPA-HQ-OAR-2014-0128,"U.S. EPA (2009) Risk and Exposure Assessment for Review of the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen and Oxides of Sulfur (Main Content). Office of Air Quality Planning and Standards, Research Triangle Park, NC. EPA-452/R-09-008a. September 2009",Supporting & Related Material,Publication - USEPA,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:42:02Z,,0,0,09000064864c2943
EPA-HQ-OAR-2014-0128-0303,EPA,EPA-HQ-OAR-2014-0128,"Sullivan et al 2003 Assessment of air quality and related values in Shenandoah National Park. Technical Report NPS/NERCHAL/NRTR-03/090. United States Department of the Interior, National Park Service, Northeast Region",Supporting & Related Material,Publication - Other Governmental,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:10:53Z,,0,0,09000064864c26cb
EPA-HQ-OAR-2014-0128-0405,EPA,EPA-HQ-OAR-2014-0128,"Shah, V, Jacob, DJ, Li, K, Silvern, RF, Zhai, S, Liu, M, Lin, J and Zhang, Q (2020). Effect of changing NOx lifetime on the seasonality and long-term trends of satellite-observed tropospheric NO2 columns over China. Atmos Chem Phy 20(3): 1483-1495.",Supporting & Related Material,Publication,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:01:00Z,,0,0,09000064864c3923
EPA-HQ-OAR-2014-0128-0380,EPA,EPA-HQ-OAR-2014-0128,"Sanz, MJ, Gries, C and Nash, TH III (1992). Dose-response relationships for SO2 fumigations in the lichens Evernia prunastri (L.) Ach. and Ramalina fraxinea (L.) Ach. New Phytol 122: 313-319.",Supporting & Related Material,Publication,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:01:37Z,,0,0,09000064864c3927
EPA-HQ-OAR-2014-0128-0096,EPA,EPA-HQ-OAR-2014-0128,"CASAC Review of the EPA’s Policy Assessment for the Review of the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen, Oxides of Sulfur and Particulate Matter (External Review Draft – May 2023). September 27, 2023. EPA-CASAC-23-005",Supporting & Related Material,Letter,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:06:18Z,,0,0,09000064864b5d86
EPA-HQ-OAR-2014-0128-0122,EPA,EPA-HQ-OAR-2014-0128,"Dupont, J, Clair, TA, Gagnon, C, Jeffries, DS, Kahl, JS, Nelson, SJ and Peckenham, JM (2005). Estimation of Critical Loads of Acidity for Lakes in Northeastern United States and Eastern Canada. Environ Monit Assess 109(1): 275-291.",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:11:55Z,,0,0,09000064864b64b3
EPA-HQ-OAR-2014-0128-0124,EPA,EPA-HQ-OAR-2014-0128,"Davis et al 2015 Effects of Increasing Nitrogen and Phosphorus Concentrations on Phytoplankton Community Growth and Toxicity During Planktothrix Blooms in Sandusky Bay, Lake Erie. Environ Sci Technol 49: 7197-7207.",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:15:01Z,,0,0,09000064864b64b5
EPA-HQ-OAR-2014-0128-0073,EPA,EPA-HQ-OAR-2014-0128,"Bedison, JE and McNeil, BE (2009). Is the growth of temperate forest trees enhanced along an ambient nitrogen deposition gradient? Ecology 90: 1736-1742",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:33:16Z,,0,0,090000648649c3a9
EPA-HQ-OAR-2014-0128-0091,EPA,EPA-HQ-OAR-2014-0128,Vegetation and soil biota response to experimentally-changed nitrogen inputs in coniferous forest ecosystems of the NITREX project. For Ecol Manage 101: 65-79.,Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:35:29Z,,0,0,090000648649c3f1
EPA-HQ-OAR-2014-0128-0250,EPA,EPA-HQ-OAR-2014-0128,"Oliver, SK, Collins, SM, Soranno, PA, Wagner, T, Stanley, EH, Jones, JR, Stow, CA and Lottig, NR (2017). Unexpected stasis in a changing world: Lake nutrient and chlorophyll trends since 1990. Global Change Biol 23: 5455-5467",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:39:21Z,,0,0,09000064864c24ac
EPA-HQ-OAR-2014-0128-0339,EPA,EPA-HQ-OAR-2014-0128,U.S. EPA (2022). Power Sector Programs Progress Report: 2021. U.S. Environmental Protection Agency,Supporting & Related Material,Publication - USEPA,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:42:24Z,,0,0,09000064864c2b66
EPA-HQ-OAR-2014-0128-0284,EPA,EPA-HQ-OAR-2014-0128,"Schreck CB. 1982. Stress and Fish: Stress and compensation in teleostean fishes: response to social and physical factors. Academic Press. London, UK",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:20:53Z,,0,0,09000064864c26b6
EPA-HQ-OAR-2014-0128-0103,EPA,EPA-HQ-OAR-2014-0128,Butler et al K (2015). Atmospheric ammonia measurements at low concentration sites in the northeastern USA: implications for total nitrogen deposition and comparison with CMAQ estimates. Biogeochemistry 122(2-3): 191-210.,Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:29:29Z,,0,0,09000064864b6921
EPA-HQ-OAR-2014-0128-0106,EPA,EPA-HQ-OAR-2014-0128,"README - Subset of TDep Data Files described in Appendix 6A of the 2024 Policy Assessment for the Review of the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen, Oxides of Sulfur, and Particulate Matter",Supporting & Related Material,Physical Item,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:17:23Z,,0,0,09000064864b6935
EPA-HQ-OAR-2014-0128-0287,EPA,EPA-HQ-OAR-2014-0128,"Sullivan et al 2013 Effects of acidic deposition and soil acidification on sugar maple trees in the Adirondack Mountains, New York. Environ Sci Technol 47(22): 12687-12694.",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:19:39Z,,0,0,09000064864c26bb
EPA-HQ-OAR-2014-0128-0323,EPA,EPA-HQ-OAR-2014-0128,"U.S. EPA (1991). National Air Quality and Emissions Trends Report, 1989. Office of Air Quality Planning and Standards, Research Triangle Park, NC. EPA 450/4-91-003. February 1991",Supporting & Related Material,Publication - USEPA,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:30:55Z,,0,0,09000064864c24fc
EPA-HQ-OAR-2014-0128-0048,EPA,EPA-HQ-OAR-2014-0128,"U.S. EPA (2020). Policy Assessment for the Review of the Ozone National Ambient Air Quality Standards. Office of Air Quality Planning and Standards, Research Triangle Park, NC. EPA-452/R-20-001. May 2020.",Supporting & Related Material,Publication - USEPA,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T00:53:29Z,,0,0,090000648649b4ca
EPA-HQ-OAR-2014-0128-0140,EPA,EPA-HQ-OAR-2014-0128,"Elser, JJ, Kyle, M, Steger, L, Nydick, KR and Baron, JS (2009). Nutrient Availability and Phytoplankton Nutrient Limitation across a Gradient of Atmospheric Nitrogen Deposition. Ecology 90: 3062-3073.",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:15:38Z,,0,0,09000064864b6aca
EPA-HQ-OAR-2014-0128-0276,EPA,EPA-HQ-OAR-2014-0128,"Root, HT, Geiser, LH, Jovan, S and Neitlich, P (2015). Epiphytic macrolichen indication of air quality and climate in interior forested mountains of the Pacific Northwest, USA. Ecol Indicat 53: 95-105",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:23:09Z,,0,0,09000064864c2685
EPA-HQ-OAR-2014-0128-0305,EPA,EPA-HQ-OAR-2014-0128,"Thomas, RQ, Canham, CD, Weathers, KC and Goodale, CL (2010). Increased Tree Carbon Storage in Response to Nitrogen Deposition in the US. Nat Geosci 3(1): 13-17.",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:21:17Z,,0,0,09000064864c26e2
EPA-HQ-OAR-2014-0128-0137,EPA,EPA-HQ-OAR-2014-0128,"Elser, JJ, Andersen, T, Baron, JS, Bergström, AK, Jansson, M, Kyle, M, Nydick, KR, Steger, L and Hessen, D (2009). Shifts in Lake N:P stoichiometry and nutrient limitation driven by atmospheric nitrogen deposition. Science 326: 835-837.",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:24:57Z,,0,0,09000064864b64da
EPA-HQ-OAR-2014-0128-0274,EPA,EPA-HQ-OAR-2014-0128,Russell and Samet 2008a,Supporting & Related Material,Letter,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:20:17Z,,0,0,09000064864c2683
EPA-HQ-OAR-2014-0128-0277,EPA,EPA-HQ-OAR-2014-0128,"Robertson, DM amd Saad, DA (2013). SPARROW models used to understand nutrient sources in the Mississippi/Atchafalaya river basin. J Environ Qual 42: 1422-1440.",Supporting & Related Material,Publication,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:19:52Z,,0,0,09000064864c2686
EPA-HQ-OAR-2014-0128-0317,EPA,EPA-HQ-OAR-2014-0128,"U.S. EPA (1982). Air Quality Criteria for Particulate Matter and Sulfur Oxides. Volume I-III. Office of Research and Development. Research Triangle Park, N.C. EPA/600/8-82/029. December 1982.",Supporting & Related Material,Publication - USEPA,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:30:07Z,,0,0,09000064864c2709
EPA-HQ-OAR-2014-0128-0078,EPA,EPA-HQ-OAR-2014-0128,"Baker et al 1991, Baker, LA, Herlihy, AT, Kaufmann, PR, and Eilers, JM (1991). Acidic lakes and streams in the United States: the role of acidic deposition. Science 252: 1151-1154.",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:11:42Z,,0,0,090000648649c3e4
EPA-HQ-OAR-2014-0128-0175,EPA,EPA-HQ-OAR-2014-0128,"Howarth 2008 Science for ecosystem-based management: Narragansett Bay in the 21st century: Estimating atmospheric nitrogen deposition in the Northeastern United States: Relevance to Narragansett Bay. Springer. New York, NY",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:05:15Z,,0,0,09000064864b6aff
EPA-HQ-OAR-2014-0128-0123,EPA,EPA-HQ-OAR-2014-0128,"Dise, NB, Rothwell, JJ, Gauci, V, van Der Salm, C and de Vries, W (2009). Predicting dissolved inorganic nitrogen leaching in European forests using two independent databases. Sci Total Environ 407(5): 1798-1808.",Supporting & Related Material,Publication - Copyrighted Materials,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:12:07Z,,0,0,09000064864b64b4
EPA-HQ-OAR-2014-0128-0138,EPA,EPA-HQ-OAR-2014-0128,"Eshleman KN, Fiscus DA, Castro NM, Webb JR and Herlihy AT (2004). Regionalization of disturbance-induced nitrogen leakage from mid-Appalachian forests using a linear systems model. Hydrol Process, 18, 2713-2725.",Supporting & Related Material,Publication,2024-04-15T04:00:00Z,2024,4,,,2024-04-16T01:13:47Z,,0,0,09000064864b64db