Integrated Science Assessment (ISA) for Oxides of Nitrogen, Oxides of Sulfur and Particulate Matter - Ecological Criteria (First External Review Draft, Mar 2017)

Notice

EPA announced the availability of the first external review draft of the Integrated Science Assessment (ISA) for Oxides of Nitrogen, Oxides of Sulfur and Particulate Matter - Ecological Criteria for public comment and review in a March 30, 2017 Federal Register Notice. The deadline for comments is May 24, 2017.


Abstract

This draft ISA document represents a concise synthesis and evaluation of the most policy-relevant science and will ultimately provide the scientific bases for EPA’s decision on retaining or revising the current secondary standards for NO2, SO2, PM 2.5 and PM 10 since the prior release of the assessment.

The intent of the ISA, as described in the Clean Air Act, is to 'accurately reflect the latest scientific knowledge expected from the presence of [a] pollutant in ambient air.' It includes scientific research from atmospheric sciences, exposure and deposition, biogeochemistry, hydrology, soil science, marine science, plant physiology, animal physiology, and ecology conducted at multiple scales (e.g., population, community, ecosystem, landscape levels). Key information and judgments formerly found in the Air Quality Criteria Documents (AQCDs) for oxides of sulfur, oxides of nitrogen and particulate matter for ecological effects are included; Appendixes provide additional details supporting the ISA. Together, the ISA and Appendixes serve to update and revise the last oxides of nitrogen and oxides of sulfur ISA which was published in 2008 and the ecological portion of the last particulate matter ISA, which was published in 2009.

Status

Following the public comment period and peer review, the ‘‘First External Review Draft Integrated Science Assessment for Oxides of Nitrogen, Oxides of Sulfur, and Particulate Matter – Ecological Criteria’’ will be discussed at a public meeting (see SAB FR Notice dated Mar 30, 2017 for meeting details and public participation) for review by CASAC and the public. In addition to the public comment period announced in the Federal Register notice, the public will also have an opportunity to address the CASAC committee.

Citation

U.S. EPA. Integrated Science Assessment (ISA) for Oxides of Nitrogen, Oxides of Sulfur and Particulate Matter - Ecological Criteria (First External Review Draft, Mar 2017). U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-16/372, 2017.

History/Chronology

Aug 2013EPA formally initiated its current review of the air quality criteria for the ecological effects of oxides of nitrogen and oxides of sulfur and the associated secondary (welfare-based) NAAQS, requesting the submission of recent scientific information on specified topics.
Mar 2014EPA conducted a workshop on March 4 to 6, 2014 for oxides of nitrogen and oxides of sulfur (79 FR 8644, February 13, 2014) to gather input from invited scientific experts, both internal and external to EPA, as well as from the public, regarding key science and policy issues relevant to the review of these secondary NAAQS. These science and policy issues were incorporated into EPA’s ‘‘Draft Integrated Review Plan for the Secondary National Ambient Air Quality Standard for Oxides of Nitrogen and Oxides of Sulfur (draft IRP)’’.
Dec 2014On December 3, 2014 (79 FR 71764), EPA formally initiated its current review of the air quality criteria for the particulate matter NAAQS.
Feb 2015EPA conducted a workshop on February 11, 2015 (79 FR 71764, December 3, 2014) for particulate matter to gather input from invited scientific experts, both internal and external to EPA, as well as from the public, regarding key science and policy issues relevant to the review of the secondary NAAQS. These science and policy issues were incorporated into EPA’s draft of the Integrated Review Plan for the National Ambient Air Quality Standards for Particulate Matter.
Aug 2015EPA hosted a multiple teleconference workshops with invited scientific experts, both internal and external to EPA, on August 25, 26 and 27, 2015 (80 FR 48316, August 12, 2015) and June 13, 2016 (81 FR 89262, May 11, 2016) to discuss initial draft materials prepared in the development of the draft ISA.
Jan 2017EPA released the final Integrated Review Plan for the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen, Oxides of Sulfur and Particulate Matter.
Mar 2017EPA released the first external review draft for public review and comment.

Additional Information

To request an electronic copy of this report, please contact Ms. Marieka Boyd by phone: 919-541-0031; fax: 919-541-5078; or email: boyd.marieka@epa.gov to request a CD-ROM, and provide your name, mailing address, and include the document title, "First External Review Draft Integrated Science Assessment for Oxides of Nitrogen, Oxides of Sulfur, and Particulate Matter – Ecological Criteria" in your request to facilitate processing. Additional comments can be entered under an additional docket at EPA Docket: EPA-HQ-OAR-2014-0128.

Docket

Comments on the assessment may be submitted and reviewed using the Docket ID EPA DOCKET: EPA-HQ-ORD-2013-0620