{"abstract":"EPA is announcing a 30-day public comment period for the draft document titled, \"Metabolically-Derived Human Ventilation Rates: A Revised Approach Based Upon Oxygen Consumption Rates\" (EPA/600/R-06/ 129A). The document was prepared by the National Center for Environmental Assessment (NCEA) within EPA's Office of Research and Development (ORD). In 1997, NCEA published the Exposure Factors Handbook. This comprehensive document provides summaries of available statistical data on various factors that can impact an individual's exposure to environmental contaminants. NCEA maintains the Exposure Factors Handbook and periodically updates the document using current literature and other reliable data made available through research. Many program offices within EPA rely on the data from this handbook to conduct their exposure and risk assessments. One important determinant of a person's exposure to contaminants in air is the ventilation rate, or the volume of air that is inhaled by an individual in a specified time period. Ventilation rates, also known as breathing or inhalation rates, are given in Chapter 5 of the Exposure Factors Handbook. Calculations of the currently recommended ventilation rates were limited by their dependence on a \"ventilatory equivalent,\" which relied on a person's fitness level. This draft report, \"Metabolically-Derived Human Ventilation Rates: A Revised Approach Based Upon Oxygen Consumption Rates,\" presents a revised approach that calculates ventilation rates directly from an individual's oxygen consumption rate, and applies this method to data provided from more recent sources, such as the 1999-2002 National Health and Nutrition Examination Survey (NHANES) and EPA's Consolidated Human Activity Database (CHAD). In the next edition of the Exposure Factors Handbook, NCEA would like to update the ventilation rate values using this revised approach and the more recently released data. EPA is releasing the draft, \"Metabolically-Derived Human Ventilation Rates: A Revised Approach Based Upon Oxygen Consumption Rates,\" solely for the purpose of pre-dissemination peer review under applicable information quality guidelines. This document has not been formally disseminated by EPA. It does not represent and should not be construed to represent any Agency policy or determination. EPA will consider any public comments submitted in accordance with this notice when revising the document.","action":"Notice of public comment period.","agencies":[{"raw_name":"ENVIRONMENTAL PROTECTION AGENCY","name":"Environmental Protection Agency","id":145,"url":"https://www.federalregister.gov/agencies/environmental-protection-agency","json_url":"https://www.federalregister.gov/api/v1/agencies/145","parent_id":null,"slug":"environmental-protection-agency"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2007/01/24/E7-826.html","cfr_references":[],"citation":"72 FR 3135","comment_url":null,"comments_close_on":"2007-02-23","correction_of":null,"corrections":[],"dates":"The 30-day public comment period begins January 24, 2007, and ends February 23, 2007. Technical comments should be in writing and must be received by EPA by February 23, 2007. In a subsequent Federal Register notice EPA will announce the details of an external peer review meeting that will be conducted via teleconference.","disposition_notes":null,"docket_ids":["FRL-8271-9","Docket ID No. EPA-HQ-ORD-2006-0868"],"dockets":[],"document_number":"E7-826","effective_on":null,"end_page":3136,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2007/01/24/E7-826.xml","html_url":"https://www.federalregister.gov/documents/2007/01/24/E7-826/metabolically-derived-human-ventilation-rates-a-revised-approach-based-upon-oxygen-consumption-rates","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/E7-826?publication_date=2007-01-24","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2007-01-24/E7-826/mods.xml","not_received_for_publication":null,"page_length":2,"page_views":{"count":18,"last_updated":"2026-04-04 10:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2007-01-24/pdf/E7-826.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2007-01-24","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2007/01/24/E7-826.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"checked_regulationsdotgov_at":"2011-11-12T20:41:46Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":3135,"subtype":null,"title":"Metabolically-Derived Human Ventilation Rates: A Revised Approach Based Upon Oxygen Consumption Rates","toc_doc":"Metabolically-derived human ventilation rates; revised approach based upon oxygen consumption rates","toc_subject":"Reports and guidance documents; availability, etc.:","topics":[],"type":"Notice","volume":72}