Update of PM2.5 Data From T640/T640X PM Mass Monitors
Primary source
Metadata and text below are from the Federal Register, a public-domain U.S. government work. Always verify the official published version before relying on it for any legal matter.
Issuing agencies
Abstract
The Environmental Protection Agency (EPA) is retroactively applying the approved modification of the Federal Equivalent Method (FEM) designation for the Teledyne Advanced Pollution Instrumentation Model T640 particulate matter (PM) mass monitor including the 640X option (hereafter T640 and T640X) to all of the concentration data for PM with a diameter 2.5 micrometers or smaller (PM<INF>2.5</INF>) from the T640 and T640X monitors in the EPA's Air Quality System (AQS) that was reported prior to the modification. The EPA processed the unmodified hourly PM<INF>2.5</INF> concentration data in AQS using collocated or paired ambient temperature when available.
Full Text
<html>
<head>
<title>Federal Register, Volume 89 Issue 96 (Thursday, May 16, 2024)</title>
</head>
<body><pre>
[Federal Register Volume 89, Number 96 (Thursday, May 16, 2024)]
[Notices]
[Page 42874]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2024-10750]
-----------------------------------------------------------------------
ENVIRONMENTAL PROTECTION AGENCY
[EPA-HQ-OAR-2023-0642; FRL: 11720-02-OAR]
Update of PM2.5 Data From T640/T640X PM Mass Monitors
AGENCY: Environmental Protection Agency (EPA).
ACTION: Notice.
-----------------------------------------------------------------------
SUMMARY: The Environmental Protection Agency (EPA) is retroactively
applying the approved modification of the Federal Equivalent Method
(FEM) designation for the Teledyne Advanced Pollution Instrumentation
Model T640 particulate matter (PM) mass monitor including the 640X
option (hereafter T640 and T640X) to all of the concentration data for
PM with a diameter 2.5 micrometers or smaller (PM<INF>2.5</INF>) from
the T640 and T640X monitors in the EPA's Air Quality System (AQS) that
was reported prior to the modification. The EPA processed the
unmodified hourly PM<INF>2.5</INF> concentration data in AQS using
collocated or paired ambient temperature when available.
DATES: Updated data will be available in AQS by May 13, 2024. Although
not required, the EPA recommends that air agencies review the updated
data by May 28, 2024, and contact their EPA Regional office with any
questions.
FOR FURTHER INFORMATION CONTACT: Mr. Brett Gantt, Office of Air Quality
Planning and Standards, Air Quality Assessment Division, Air Quality
Analysis Group (Mail Code: C304-04), Environmental Protection Agency,
109 T.W. Alexander Drive, Research Triangle Park, NC 27711; telephone
number: (919) 541-5274; email address <a href="/cdn-cgi/l/email-protection#0265636c76762c6070677676426772632c656d74"><span class="__cf_email__" data-cfemail="5730363923237935253223231732273679303821">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
I. Public Comments
Because of the importance of this air quality data for regulatory,
scientific, and public use, the EPA provided an opportunity for the
public to comment on the EPA's plan to retroactively update the
PM<INF>2.5</INF> data from T640/T640X PM mass monitors (89 FR 11831).
The EPA received a total of 25 non-duplicative comments. For a summary
of the comments received and EPA's responses, please see the document
titled, ``Summary of and Responses to Public Comments on the EPA's Plan
to Update PM<INF>2.5</INF> Data from T640/T640X PM Mass Monitors,''
located in the docket for this action at <a href="https://www.regulations.gov">https://www.regulations.gov</a>
under Docket ID No. EPA-HQ-OAR-2023-0642 and on the EPA's website at
<a href="https://www.epa.gov/aqs/aqs-memos-monitoring-and-policy">https://www.epa.gov/aqs/aqs-memos-monitoring-and-policy</a>.
II. Data Update Supplemental Information
For detailed information regarding the EPA's retroactive update of
air quality data and how these data may be used, please see the
document titled, ``Supplemental Information on the EPA's Update of
PM<INF>2.5</INF> Data from T640/T640X PM Mass Monitors,'' located in
the docket for this action at <a href="https://www.regulations.gov">https://www.regulations.gov</a> under Docket
ID No. EPA-HQ-OAR-2023-0642 and on the EPA's website at <a href="https://www.epa.gov/aqs/aqs-memos-monitoring-and-policy">https://www.epa.gov/aqs/aqs-memos-monitoring-and-policy</a>.
Richard A. Wayland,
Director, Air Quality Assessment Division.
[FR Doc. 2024-10750 Filed 5-15-24; 8:45 am]
BILLING CODE 6560-50-P
</pre><script data-cfasync="false" src="/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js"></script></body>
</html>This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.