44842 Federal Register / Vol. 74, No. 167 / Monday, August 31, 2009 / Notices 

DEPARTMENT OF ENERGY 

Federal Energy Regulatory 

Commission 

[Docket Nos. ER08–1113–004; ER08–1113– 

005] 

California Independent System 

Operator Corporation; Notice of 

Technical Conference Comment Dates 

August 21, 2009. 

On August 20, 2009, the Commission 

convened a staff technical conference in 

the above-captioned proceedings. The 

purpose of the technical conference was 

to explore issues concerning Market 

Efficiency Enhancement Agreements 

between the California Independent 

System Operator Corporation and 

eligible market participants. 

During the course of the technical 

conference, the Commission instructed 

the presenting parties to file their 

presentations in the above dockets. 

All interested persons may file 

written comments on these 

presentations and/or issues addressed in 

the technical conference on or before 

September 10, 2009. Reply comments 

will be due on or before September 17, 

2009. 

Kimberly D. Bose, 

Secretary. 

[FR Doc. E9–20849 Filed 8–28–09; 8:45 am] 

BILLING CODE 6717–01–P 

ENVIRONMENTAL PROTECTION 

AGENCY 

[FRL–8951–4; Docket ID No. EPA–HQ–ORD– 

2007–0517] 

Extension of Public Comment Period: 

Second External Review Draft 

Integrated Science Assessment for 

Particulate Matter 

AGENCY: Environmental Protection 

Agency (EPA). 

ACTION: Extension of public comment 

period. 

SUMMARY: The EPA is announcing an 

extension of the public comment period 

for the draft document titled, 

‘‘Integrated Science Assessment for 

Particulate Matter—Second External 

Review Draft’’ (EPA/600/R–08/139B and 

EPA/600/R–08/139BA). The document 

was prepared by the National Center for 

Environmental Assessment (NCEA) 

within EPA’s Office of Research and 

Development as part of the review of the 

national ambient air quality standards 

(NAAQS) for particulate matter. 

On July 31, 2009 (74 FR 38185), EPA 

released this draft document to seek 

review by the Clean Air Scientific 

Advisory Committee (CASAC) and the 

public (meeting date and location to be 

specified in a separate Federal Register 

notice). The draft document does not 

represent and should not be construed 

to represent any final EPA policy, 

viewpoint, or determination. EPA will 

consider any public comments 

submitted in response to this notice 

when revising the document. 

DATES: The public comment period 

started on July 31, 2009 (74 FR 38185). 

This notice announces the extension of 

the deadline for public comment from 

September 30, 2009, to October 12, 

2009. Comments must be received on or 

before October 12, 2009. 

ADDRESSES: The ‘‘Second External 

Review Draft Integrated Science 

Assessment for Particulate Matter’’ is 

available primarily via the Internet on 

the National Center for Environmental 

Assessment’s home page under the 

Recent Additions and Publications 

menus at http://www.epa.gov/ncea. A 

limited number of CD–ROM or paper 

copies will be available. Contact Ms. 

Debbie Wales by phone (919–541–4731), 

fax (919–541–5078), or e-mail 

(wales.deborah@epa.gov) to request 

either of these, and please provide your 

name, your mailing address, and the 

document title, ‘‘Second External 

Review Draft Integrated Science 

Assessment for Particulate Matter’’ 

(EPA/600/R–08/139B and EPA/600/R– 

08/139C) to facilitate processing of your 

request. 

FOR FURTHER INFORMATION CONTACT: For 

technical information, contact Dr. 

Lindsay Wichers Stanek, NCEA; 

telephone: 919–541–7792; fax: 919– 

541–2985; or e-mail: 

stanek.lindsay@epa.gov. 

SUPPLEMENTARY INFORMATION: 

I. Information About the Document 

Section 108(a) of the Clean Air Act 

directs the Administrator to identify 

certain pollutants which, among other 

things, ‘‘cause or contribute to air 

pollution which may reasonably be 

anticipated to endanger public health or 

welfare’’ and to issue air quality criteria 

for them. These air quality criteria are 

to ‘‘accurately reflect the latest scientific 

knowledge useful in indicating the kind 

and extent of all identifiable effects on 

public health or welfare which may be 

expected from the presence of [a] 

pollutant in the ambient air. * * *’’ 

Under section 109 of the Act, EPA is 

then to establish national ambient air 

quality standards (NAAQS) for each 

pollutant for which EPA has issued 

criteria. Section 109(d) of the Act 

subsequently requires periodic review 

and, if appropriate, revision of existing 

air quality criteria to reflect advances in 

scientific knowledge on the effects of 

the pollutant on public health or 

welfare. EPA is also to revise the 

NAAQS, if appropriate, based on the 

revised air quality criteria. 

Particulate matter (PM) is one of six 

‘‘criteria pollutants’’ for which EPA has 

established NAAQS. Periodically, EPA 

reviews the scientific basis for these 

standards by preparing an Integrated 

Science Assessment (ISA) (formerly 

called an Air Quality Criteria 

Document). The ISA and supplementary 

annexes, in conjunction with additional 

technical and policy assessments, 

provide the scientific basis for EPA 

decisions on the adequacy of the current 

NAAQS and the appropriateness of 

possible alternative standards. The 

Clean Air Scientific Advisory 

Committee (CASAC), an independent 

science advisory committee whose 

existence and whose review and 

advisory functions are mandated by 

Section 109(d)(2) of the Act, is charged 

(among other things) with independent 

scientific review of EPA’s air quality 

criteria. 

On June 28, 2007 (72 FR 35462), EPA 

formally initiated its current review of 

the air quality criteria for PM, 

requesting the submission of recent 

scientific information on specified 

topics. A draft of EPA’s ‘‘Integrated 

Review Plan for the National Ambient 

Air Quality Standard for Particulate 

Matter’’ (EPA/452/P–08–006) was made 

available in October 2007 for public 

comment and was discussed by the 

CASAC PM Review Panel via a publicly 

accessible teleconference consultation 

on November 30, 2007 (72 FR 63177). 

EPA finalized the plan and made it 

available in March 2008 (EPA/452/R– 

08–004; http://www.epa.gov/ttn/naaqs/ 

standards/pm/s_pm_2007_pd.html). In 

June 2008 (73 FR 30391), EPA held a 

workshop to discuss, with invited 

scientific experts, initial draft materials 

prepared in the development of the PM 

ISA and its supplementary annexes. 

The First External Review Draft ISA 

for PM (EPA/600/R–08/139 and EPA/ 

600/R–08/139A; http://cfpub.epa.gov/ 

ncea/cfm/ 

recordisplay.cfm?deid=201805) was 

released on December 22, 2008 (73 FR 

77686). This document was reviewed by 

the CASAC and discussed at a public 

meeting on April 1 and 2, 2009 (74 FR 

7688). The CASAC held a follow-up 

public teleconference on May 7, 2009 

(74 FR 18230) to review and approve the 

CASAC PM Review Panel’s draft letter 

providing comments to the Agency on 

the First External Review Draft ISA for 

PM (http://yosemite.epa.gov/sab/ 


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