[Federal Register Volume 59, Number 81 (Thursday, April 28, 1994)]
[Unknown Section]
[Page ]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-10142]


[Federal Register: April 28, 1994]


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ENVIRONMENTAL PROTECTION AGENCY
[FRL-4879-3]


Ozone Design Value Study of the Clean Air Act Amendments of 1990

AGENCY: Environmental Protection Agency (EPA).

ACTION: Extension of comment period for draft report on the ``Clean Air 
Act Ozone Design Value Study''.

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SUMMARY: Section 183(g) of title I of the Clean Air Act Amendments of 
1990 requires the Administrator to conduct a study of whether the 
methodology in use by the EPA, as of the date of enactment, for 
establishing a design value for ozone, provides a reasonable indicator 
of the ozone air quality of ozone nonattainment areas. The EPA is 
directed to obtain public review of the study report prior to 
submitting the report to Congress.
    The focus of the Ozone Design Value Study is EPA's ozone design 
value methodology. A design value may be viewed intuitively as a 
concentration value used to quantify the degree to which the level of 
an air quality standard has been exceeded. With the wording of the 
ozone standard, the appropriate design value is the concentration with 
expected number of exceedances equal to 1. These ozone design values 
were used to classify areas as marginal, moderate, serious, severe, or 
extreme in accordance with the provisions of the Clean Air Act 
Amendments of 1990.
    This notice extends the period for public review and comment of the 
draft report of the ``Clean Air Act Ozone Design Value Study'' from 30 
days to 60 days.

DATES: Comments must be received by May 31, 1994.

Availability of Draft Report

    Single copies of the report are available from the U.S. EPA Library 
(MD-35), Research Triangle Park, North Carolina 27711, telephone number 
(919) 541-2777. Please refer to ``The Clean Air Act Ozone Design Value 
Study.''

ADDRESSES: Written comments should be submitted to Mr. Warren P. Freas, 
U.S. Environmental Protection Agency, Data Analysis Section, Monitoring 
and Reports Branch, Technical Support Division MD-14, Research Triangle 
Park, North Carolina, 27711.

FOR FURTHER INFORMATION CONTACT:
Mr. Warren P. Freas at (919) 541-5469, Data Analysis Section. 
Monitoring and Reports Branch (MD-14), U.S. Environmental Protection 
Agency, Research Triangle Park, North Carolina 27711.

    Dated: April 19, 1994.
Mary D. Nichols,
Assistant Administrator, for Air and Radiation.
[FR Doc. 94-10142 Filed 4-26-94; 8:45 am]
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