[Federal Register Volume 64, Number 177 (Tuesday, September 14, 1999)]
[Proposed Rules]
[Pages 49756-49757]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 99-23917]


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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[FRL-6438-4]


Assessment of Visibility Impairment at the Grand Canyon National 
Park: Advance Notice of Proposed Rulemaking; Extension of Public 
Comment Period

AGENCY: Environmental Protection Agency.

ACTION: Advance notice of proposed rulemaking; extension of public 
comment period.

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SUMMARY: The Environmental Protection Agency (EPA) is extending the 
comment period for an advance notice of proposed rulemaking, published 
June 17, 1999 (64 FR 32458), regarding visibility impairment at the 
Grand Canyon National Park (GCNP) and the possibility that the Mohave 
Generating Station (MGS) in Laughlin, Nevada may contribute to that 
impairment. In the June 17 document, EPA requests information that it 
should consider in determining whether visibility problems at the GCNP 
can be reasonably

[[Page 49757]]

attributed to MGS, and if so, what, if any, pollution control 
requirements should be applied.
    The public comment period for the advance notice of proposed 
rulemaking was originally due to expire on August 16, 1999. On August 
6, 1999, at the request of Southern California Edison Company, EPA 
published a document extending the public comment period for 30 days 
(64 FR 42891). At the request of the Grand Canyon Trust, EPA is now 
extending the public comment period for an additional 15 days.

DATES: The comment period on the advance notice of proposed rulemaking 
is extended until September 30, 1999.

ADDRESSES: Comments should be submitted (in duplicate, if possible) to: 
EPA Region IX, 75 Hawthorne Street (AIR2), San Francisco, CA 94105, 
Attn: Regina Spindler.

FOR FURTHER INFORMATION CONTACT: Regina Spindler (415) 744-1251, 
Planning Office (AIR2), Air Division, EPA Region IX, 75 Hawthorne 
Street, San Francisco, CA 94105.

    Dated: September 3, 1999.
Felicia Marcus,
Regional Administrator, Region 9.
[FR Doc. 99-23917 Filed 9-13-99; 8:45 am]
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