[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-1-en-105":3,"doc-seo-191633-105":53,"doc-detail-191633-en":126},{"code":4,"msg":5,"data":6},0,"success",[7,14,19,24,29,34,39,44,49],{"id":8,"doc_module":9,"doc_module_name":10,"category_name":11,"show_sort_weight":12,"slug":13},11,1,"Template","Presentations",90,"presentations",{"id":15,"doc_module":9,"doc_module_name":10,"category_name":16,"show_sort_weight":17,"slug":18},12,"Resumes",80,"resumes",{"id":20,"doc_module":9,"doc_module_name":10,"category_name":21,"show_sort_weight":22,"slug":23},14,"Invoices",70,"invoices",{"id":25,"doc_module":9,"doc_module_name":10,"category_name":26,"show_sort_weight":27,"slug":28},15,"Posters",60,"posters",{"id":30,"doc_module":9,"doc_module_name":10,"category_name":31,"show_sort_weight":32,"slug":33},16,"Social Media",50,"social-media",{"id":35,"doc_module":9,"doc_module_name":10,"category_name":36,"show_sort_weight":37,"slug":38},17,"Forms",40,"forms",{"id":40,"doc_module":9,"doc_module_name":10,"category_name":41,"show_sort_weight":42,"slug":43},18,"Letters",30,"letters",{"id":45,"doc_module":9,"doc_module_name":10,"category_name":46,"show_sort_weight":47,"slug":48},21,"Paper Templates",5,"papers-templates",{"id":50,"doc_module":9,"doc_module_name":10,"category_name":51,"show_sort_weight":4,"slug":52},158,"General","general-158",{"code":4,"msg":54,"data":55},"ok",{"site_id":56,"language":57,"slug":58,"title":59,"keywords":60,"description":61,"schema_data":62,"social_meta":119,"head_meta":121,"extra_data":123,"updated_unix":125},105,"en","2024-castnet-annual-network-plan-clean-air-power-division-office-of-atmospheric-protection","2024 CASTNET Annual Network Plan - Clean Air & Power Division - Office of Atmospheric Protection","","2024 CASTNET Annual Network Plan outlines the Clean Air Status and Trends Network’s long-term multipollutant monitoring approach for tracking regional air quality trends, including ozone, nitrogen species, and sulfur compounds. The plan describes collaborative governance across EPA, NPS, and BLM, site responsibilities, and contractor operations. It details measurement coverage across dozens of locations, filter pack and hourly meteorological reporting, ozone analyzer requirements, trace-level monitoring at select sites, and references supporting appendices for objectives and siting criteria.",{"@graph":63,"@context":118},[64,80,101],{"@type":65,"itemListElement":66},"BreadcrumbList",[67,71,74,77],{"item":68,"name":69,"@type":70,"position":9},"https://docshare.wps.com","Home","ListItem",{"item":72,"name":10,"@type":70,"position":73},"https://docshare.wps.com/template/",2,{"item":75,"name":11,"@type":70,"position":76},"https://docshare.wps.com/template/presentations/",3,{"item":78,"name":59,"@type":70,"position":79},"https://docshare.wps.com/template/2024-castnet-annual-network-plan-clean-air-power-division-office-of-atmospheric-protection/191633/",4,{"url":78,"name":59,"@type":81,"image":82,"author":87,"headline":59,"publisher":90,"fileFormat":93,"inLanguage":57,"description":61,"dateModified":94,"datePublished":95,"encodingFormat":93,"isAccessibleForFree":96,"interactionStatistic":97},"DigitalDocument",{"url":83,"@type":84,"width":85,"height":86},"https://docshare.wps.com/thumbnails/2024-castnet-annual-network-plan-clean-air-power-division-office-of-atmospheric-protection/191633.png","ImageObject",442,249,{"name":88,"@type":89},"Stanford","Person",{"url":68,"name":91,"@type":92},"DocShare","Organization","application/pdf","2026-10-04","2026-09-03",true,{"@type":98,"interactionType":99,"userInteractionCount":79},"InteractionCounter",{"@type":100},"ViewAction",{"@type":102,"mainEntity":103},"FAQPage",[104,110,114],{"name":105,"@type":106,"acceptedAnswer":107},"What is the CASTNET monitoring network used for?","Question",{"text":108,"@type":109},"CASTNET is designed to report long-term regional air quality trends, including ozone, oxidized and reduced nitrogen forms, and sulfur. It supports regional transport assessment, chemical transport model validation, and NAAQS review inputs related to health and environmental impacts.","Answer",{"name":111,"@type":106,"acceptedAnswer":112},"Which agencies collaborate to manage CASTNET?",{"text":113,"@type":109},"CASTNET is managed collaboratively by the U.S. Environmental Protection Agency (Clean Air and Power Division), the National Park Service (Air Resources Division), and the Bureau of Land Management (Wyoming State Office). Contractors operate different sets of EPA-sponsored and other sites.",{"name":115,"@type":106,"acceptedAnswer":116},"What pollutants and measurements does the plan describe at CASTNET sites?",{"text":117,"@type":109},"Eighty-seven? (as stated: 83 for filter pack and weekly concentrations) sites measure weekly sulfur dioxide, sulfate, nitrate/nitric acid, ammonium, chloride, and base cations using a 3-stage filter pack. The plan also includes hourly 9-meter temperature reporting, hourly O3 monitoring at many sites, additional hourly meteorological parameters at some sites, and trace-level NO/NOy, SO2, and CO at select locations.","https://schema.org",{"og:url":78,"og:type":120,"og:title":59,"og:site_name":91,"og:description":61},"article",{"robots":122,"canonical":78},"index,follow",{"doc_id":124,"site_id":56},191633,1788409767,{"code":4,"msg":5,"data":127},{"doc_id":124,"user_id":128,"nickname":88,"user_avatar":129,"doc_module":9,"category_id":8,"category_name":11,"doc_title":59,"doc_description":61,"doc_content":130,"file_id":131,"file_url":132,"file_type":133,"file_size":134,"view_count":47,"is_deleted":4,"is_public":9,"is_downloadable":9,"audit_status":9,"page_count":135,"language":136,"language_code":57,"site_id":56,"html_lang":57,"table_of_contents":137,"faqs":138,"seo_title":139,"seo_description":61,"update_tm":125,"read_time":32},2336477552062,"https://ap-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","|  |\n| --- |\n| |\n| Panoramic view of the CASTNET site at Cadiz, Kentucky (CDZ171)\u003Cbr>DRAFT\u003Cbr>2024 CASTNET Annual Network Plan\u003Cbr>Clean Air & Power Division\u003Cbr>Office of Atmospheric Protection\u003Cbr>US Environmental Protection Agency\u003Cbr>May 31, 2024 |\n\n\n| 1. Network Overview\u003Cbr>The Clean Air Status and Trends Network (CASTNET) is a long-term multipollutant monitoring network designed to report trends in regional air quality including ozone (O3), oxidized and reduced forms of nitrogen, and sulfur. CASTNET fills an important role in the National Air Monitoring program by providing data in rural, disadvantaged communities that are often not monitored by the State and Local Air Monitoring Sites (SLAMS) . CASTNET data are used to assess regional pollutant transport, validate and evaluate chemical transport models (e.g., CMAQ), and inform NAAQS reviews that consider human health and environmental impacts due to air pollution. CASTNET is managed collaboratively by the US Environmental Protection Agency – Clean Air and Power Division (EPA), the National Park Service – Air Resources Division (NPS), and the Bureau of Land Management – Wyoming State Office (BLM-WSO) . In addition to EPA, NPS, and BLM-WSO, numerous other participants provide network support including tribes and other federal agencies, states, private landowners, and universities. The EPA contractor, WSP USA (WSP), operates the EPA-sponsored sites while the NPS and BLM-WSO contractor, Air Resource Specialists, Inc. (ARS), operates the remaining sites. A table detailing the management structure of CASTNET operations is provided in Figure 1. A summary of the entire CASTNET monitoring program is available online.1 |  |  |  |\n| --- | --- | --- | --- |\n|  | US Government | US Government Contractors |  |\n| EPA – Clean Air & Power Division\u003Cbr>• Project Officer\u003Cbr>• QA Manager\u003Cbr>• Technical Monitors\u003Cbr>• Administrative Contracting Officer\u003Cbr>• Contract Property Coordinator WSP\u003Cbr>• Project Manager\u003Cbr>o Field Operations Manager\u003Cbr>o Laboratory Operations Manager\u003Cbr>o Data Management, Analysis, Interpretation, and Reporting Manager\u003Cbr>o Property Control Manager\u003Cbr>• QA Supervisor\u003Cbr>o QA Manager NPS – Air Resources Division\u003Cbr>• Contracting Officer’s Representative (COR)\u003Cbr>• QA Coordinator ARS\u003Cbr>• Program Manager\u003Cbr>o Network Operations Manager\u003Cbr>o Data Management Manager\u003Cbr>• QA Officer BLM – Wyoming State Office\u003Cbr>• Program Manager\u003Cbr>Figure 1. CASTNET Project Organization\u003Cbr>Eighty-three CASTNET sites measure weekly concentrations of sulfur dioxide (SO2), sulfate (SO42-), nitrate (NO3- ), nitric acid (HNO3), ammonium (NH4+), chloride (Cl- ) and base cations using a 3-stage filter pack (see Figure 2) . Each site also reports hourly 9-meter temperature data to calculate local condition flow volumes. Eighty CASTNET sites collect ambient O3 concentrations, reported as hourly averages, using a dual cell, ultraviolet photometric analyzer. Seventy-nine of the eighty CASTNET O3 monitoring analyzers meet the ambient monitoring and quality assurance requirements of Title 40, Code of Federal Regulations (CFR) Part 58 Appendices A, C, D and E. The ozone analyzer at Duke Forest, NC (DUK008) does not meet the siting criteria requirements from Appendix E of Part 58 because it has an inlet above the forest canopy at a height of 48 meters. Monitoring objectives, site types, detailed siting criteria, and other relevant parameters for each monitoring site may be found in Appendix A of this plan.\u003Cbr>In addition to weekly filter pack and hourly temperature and O3 measurements, thirty-nine CASTNET sites report other hourly meteorological parameters. CASTNET also measures trace-level NO/NOy, SO2, and CO at select sites. CASTNET O3 and trace-level gas monitors report hourly measurements throughout the entire year. Ozone analyzers are challenged nightly with known\u003Cbr>1 CASTNET monitoring program [https://www3.epa.gov/castnet/docs/CASTNET-Factsheet-2021.pdf](https://www3.epa.gov/castnet/docs/CASTNET-Fac","cbCaiskGZMQwM6IS","https://ap.wps.com/l/cbCaiskGZMQwM6IS","pdf",2617441,142,"English","# Network Overview\n## Monitoring Program Scope and Collaboration\n## Site Measurements and Coverage\n## Ozone Analyzer Requirements and Siting Criteria\n## Additional Instrumentation and Meteorological Parameters\n## Calibration and Audit Levels","[{\"question\":\"What is the CASTNET monitoring network used for?\",\"answer\":\"CASTNET is designed to report long-term regional air quality trends, including ozone, oxidized and reduced nitrogen forms, and sulfur. It supports regional transport assessment, chemical transport model validation, and NAAQS review inputs related to health and environmental impacts.\"},{\"question\":\"Which agencies collaborate to manage CASTNET?\",\"answer\":\"CASTNET is managed collaboratively by the U.S. Environmental Protection Agency (Clean Air and Power Division), the National Park Service (Air Resources Division), and the Bureau of Land Management (Wyoming State Office). Contractors operate different sets of EPA-sponsored and other sites.\"},{\"question\":\"What pollutants and measurements does the plan describe at CASTNET sites?\",\"answer\":\"Eighty-seven? (as stated: 83 for filter pack and weekly concentrations) sites measure weekly sulfur dioxide, sulfate, nitrate/nitric acid, ammonium, chloride, and base cations using a 3-stage filter pack. The plan also includes hourly 9-meter temperature reporting, hourly O3 monitoring at many sites, additional hourly meteorological parameters at some sites, and trace-level NO/NOy, SO2, and CO at select locations.\"}]","2024 CASTNET Annual Network Plan - Clean Air & Power Division - Office of Atmospheric Protection | PDF"]