[Federal Register Volume 64, Number 51 (Wednesday, March 17, 1999)]
[Notices]
[Pages 13198-13199]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 99-6508]


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ENVIRONMENTAL PROTECTION AGENCY

[NCEA-CD-99-1015; FRL-6310-4]


Air Quality Criteria for Carbon Monoxide (External Review Draft); 
Estimation of Carbon Monoxide Exposures and Associated 
Carboxyhemoglobin Levels in Denver Residents Using pNEM/CO (Version 
2.0) (Draft)

AGENCY: Environmental Protection Agency.

ACTION: Notice of two drafts for public review and comment.

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SUMMARY: The U.S. Environmental Protection Agency (EPA), National 
Center for Environmental Assessment, is announcing the availability of 
an external review draft of the document, Air Quality Criteria for 
Carbon Monoxide. Required under sections 108 and 109 of the Clean Air 
Act, the purpose of this document is to provide an assessment of the 
latest, relevant

[[Page 13199]]

scientific information that may have an impact on the next periodic 
review of the National Ambient Air Quality Standards (NAAQS) for carbon 
monoxide (CO).
    The EPA's Office of Air Quality Planning and Standards (OAQPS) is 
announcing the availability of a draft carbon monoxide exposure 
analysis methodology report, Estimation of Carbon Monoxide Exposures 
and Associated Carboxyhemoglobin Levels in Denver Residents Using pNEM/
CO (Version 2.0). This document is part of the technical support work 
that will be summarized in the OAQPS staff paper on carbon monoxide.

DATES: Anyone who wishes to comment on the draft document, Air Quality 
Criteria Document for Carbon Monoxide, may do so in writing by May 15, 
1999. Send the written comments to the Project Manager for Carbon 
Monoxide, National Center for Environmental Assessment-RTP Office (MD-
52), U.S. Environmental Protection Agency, Research Triangle Park, NC 
27711.
    The OAQPS draft report will be available by March 15, 1999. A 
letter that will be included with copies of the draft will discuss the 
length of time that OAQPS is allowing the public for comment and will 
provide mailing information for the comments.

ADDRESSES: To obtain a copy of the Air Quality Criteria for Carbon 
Monoxide (External Review Draft) 1999, EPA/600/P-99/001, contact the 
National Service Center for Environmental Publications. Request a copy 
by telephoning 1-800-490-9198 and provide the title and the EPA number 
for the document. Internet users may obtain a copy from the EPA's 
National Center for Environmental Assessment (NCEA's) home page. The 
URL is http://www.epa.gov/ncea/.
    To obtain a copy of the Estimation of Carbon Monoxide Exposures and 
Associated Carboxyhemoglobin Levels in Denver Residents Using pNEM/CO 
(Version 2.0), Internet users can go to the EPA's OAR Policy and 
Guidance page on the OAQPS TTNWeb. The URL is http://www.epa.gov/ttn/
caa/t1sp.html. A limited number of paper copies of this document will 
be available and can be obtained from: U.S. Environmental Protection 
Agency Library, MD-35, Research Triangle Park, NC 27711, telephone 
(919) 541-2777.
FOR FURTHER INFORMATION CONTACT: Mr. James Raub, National Center for 
Environmental Assessment-RTP Office (MD-52), U.S. Environmental 
Protection Agency, Research Triangle Park, NC 27711; telephone: 919-
541-4157; facsimile: 919-541-1818; E-mail: [email protected]. Mr. Raub 
will provide information on the draft document, Air Quality Criteria 
for Carbon Monoxide.
    For further information related to the draft exposure analysis 
methodology report for Denver, contact Mr. Harvey Richmond, Office of 
Air Quality Planning and Standards (MD-15), U.S. Environmental 
Protection Agency, Research Triangle Park, NC 27711; telephone: 919-
541-5271; facsimile: 919-541-0840; E-mail: [email protected].

SUPPLEMENTARY INFORMATION: The U.S. Environmental Protection Agency 
(EPA) is updating and revising, where appropriate, the EPA's Air 
Quality Criteria for Carbon Monoxide (CO). Sections 108 and 109 of the 
Clean Air Act require that the EPA carry out a periodic review and 
revision, where appropriate, of the criteria and the National Ambient 
Air Quality Standards (NAAQS) for the ``criteria'' air pollutants such 
as carbon monoxide.
    After the completion of the comment period, the EPA will present 
the external review draft of the Air Quality Criteria for Carbon 
Monoxide and, as supporting documentation for the OAQPS staff paper on 
carbon monoxide, the Estimation of Carbon Monoxide Exposures and 
Associated Carboxyhemoglobin Levels in Denver Residents Using pNEM/CO 
(Version 2.0) for review before the Clean Air Scientific Advisory 
Committee (CASAC) later in 1999. The EPA will issue a subsequent 
Federal Register document to inform the public of the exact date and 
time of this meeting.

    Dated: March 9, 1999.
William H. Farland,
Director, National Center for Environmental Assessment.
[FR Doc. 99-6508 Filed 3-16-99; 8:45 am]
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