Federal Register / Vol. 74, No. 183 / Wednesday, September 23, 2009 / Notices 48539 

Ethyl Tertiary Butyl Ether assessment, 

contact Andrew Hotchkiss, IRIS Staff, 

National Center for Environmental 

Assessment, U.S. EPA, 109 T.W. 

Alexander Drive, B243–01, Durham, NC 

27711; telephone: 919–541–4164; 

facsimile: 919–541–0245; or e-mail: 

hotchkiss.andrew@epa.gov. 

SUPPLEMENTARY INFORMATION: IRIS is a 

database that contains potential adverse 

human health effects information that 

may result from chronic (or lifetime) 

exposure to specific chemical 

substances found in the environment. 

The database (available on the Internet 

at http://www.epa.gov/iris) contains 

qualitative and quantitative health 

effects information for more than 540 

chemical substances that may be used to 

support the first two steps (hazard 

identification and dose-response 

evaluation) of a risk assessment process. 

When supported by available data, the 

database provides oral reference doses 

(RfDs) and inhalation reference 

concentrations (RfCs) for chronic health 

effects, and oral slope factors and 

inhalation unit risks for carcinogenic 

effects. Combined with specific 

exposure information, government and 

private entities can use IRIS data to help 

characterize public health risks of 

chemical substances in a site-specific 

situation and thereby support risk 

management decisions designed to 

protect public health. 

This listening session is a step in 

EPA’s revised process, announced on 

May 21, 2009, for development of 

human health assessments for inclusion 

on IRIS. The updated process is posted 

on the IRIS home page at http:// 

www.epa.gov/iris. 

Dated: September 10, 2009. 

Rebecca Clark, 

Acting Director, National Center for 

Environmental Assessment. 

[FR Doc. E9–22923 Filed 9–22–09; 8:45 am] 

BILLING CODE 6560–50–P 

ENVIRONMENTAL PROTECTION 

AGENCY 

[FRL–8954–9; Docket ID No. EPA–HQ–ORD– 

2009–0245] 

Draft Toxicological Review of 

Hydrogen Cyanide and Cyanide Salts: 

In Support of the Summary Information 

in the Integrated Risk Information 

System (IRIS) 

AGENCY: Environmental Protection 

Agency (EPA). 

ACTION: Notice of public comment 

period and listening session. 

SUMMARY: EPA is announcing a public 

comment period and a public listening 

session for the external review draft 

document titled, ‘‘Toxicological Review 

of Hydrogen Cyanide and Cyanide Salts: 

In Support of Summary Information on 

the Integrated Risk Information System 

(IRIS)’’ (EPA/635/R–08/016). The draft 

document was prepared by the National 

Center for Environmental Assessment 

(NCEA) within the EPA’s Office of 

Research and Development (ORD). The 

public comment period and the external 

peer-review workshop, which will be 

scheduled at a later date and announced 

in the Federal Register, are separate 

processes that provide opportunities for 

all interested parties to comment on the 

document. EPA intends to forward the 

public comments that are submitted in 

accordance with this notice to the 

external peer-review panel prior to the 

meeting for their consideration. When 

finalizing the draft document, EPA 

intends to consider any public 

comments that EPA receives in 

accordance with this notice. 

EPA is also announcing a listening 

session to be held on October 27, 2009, 

during the public comment period for 

this draft document. This listening 

session is a step in EPA’s revised IRIS 

process, announced on May 21, 2009, to 

develop human health assessments for 

inclusion in the IRIS database. The 

purpose of the listening session is to 

allow all interested parties to present 

scientific and technical comments on 

draft IRIS health assessments to EPA 

and other interested parties during the 

public comment period and before the 

external peer review meeting. EPA 

welcomes the scientific and technical 

comments that will be provided to the 

Agency by the listening session 

participants. The comments will be 

considered by the Agency as it revises 

the draft assessment in response to the 

independent external peer review and 

the public comments. All presentations 

will become part of the official public 

record. 

EPA is releasing this draft document 

solely for the purpose of predissemination peer review under 

applicable information quality 

guidelines. This document has not been 

formally disseminated by EPA. It does 

not represent and should not be 

construed to represent any Agency 

policy or determination. 

DATES: The public comment period 

begins September 23, 2009, and ends 

November 23, 2009. Technical 

comments should be in writing and 

must be received by EPA by November 

23, 2009. 

The listening session on the draft IRIS 

health assessment for Hydrogen Cyanide 

and Cyanide Salts will be held on 

October 27, 2009, beginning at 9 a.m. 

and ending at 4 p.m., Eastern Daylight 

Time. If you want to make a 

presentation at the listening session, 

you should register by October 20, 2009, 

indicate that you wish to make oral 

comments at the session, and indicate 

the length of your presentation. When 

you register, please indicate if you will 

need audio-visual aid (e.g., lap top and 

slide projector). In general, each 

presentation should be no more than 30 

minutes. If, however, there are more 

requests for presentations than the 

allotted time allows, then the time limit 

for each presentation will be adjusted. A 

copy of the agenda for the listening 

session will be available at the meeting. 

If no speakers have registered by 

October 20, 2009, the listening session 

will be cancelled and EPA will notify 

those registered of the cancellation. 

Listening session participants who 

want EPA to share their comments with 

the external peer reviewers should also 

submit written comments during the 

public comment period using the 

detailed and established procedures 

described in the SUPPLEMENTARY

INFORMATION section of this notice. 

Comments submitted to the docket prior 

to the end of the public comment period 

will be submitted to the external peer 

reviewers and considered by EPA in the 

disposition of public comments. All 

comments must be submitted to the 

docket, but comments received after the 

public comment period closes will not 

be submitted to the external peer 

reviewers. 

ADDRESSES: The draft ‘‘Toxicological 

Review of Hydrogen Cyanide and 

Cyanide Salts: In Support of Summary 

Information on the Integrated Risk 

Information System (IRIS)’’ is available 

primarily via the Internet on the NCEA 

home page under the Recent Additions 

and Publications menus at http:// 

www.epa.gov/ncea. A limited number of 

paper copies are available from the 

Information Management Team, NCEA; 

telephone: 703–347–8561; facsimile: 

703–347–8691. If you are requesting a 

paper copy, please provide your name, 

mailing address, and the document title. 

Comments may be submitted 

electronically via 

http://www.regulations.gov, by mail, by 

facsimile, or by hand delivery/courier. 

Please follow the detailed instructions 

as provided in the SUPPLEMENTARY

INFORMATION section of this notice. 

The listening session on the draft 

Hydrogen Cyanide and Cyanide Salts 

assessment will be held at the EPA 

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48540 Federal Register / Vol. 74, No. 183 / Wednesday, September 23, 2009 / Notices 

offices at Two Potomac Yard (North 

Building), 7th Floor, Room 7100, 2733 

South Crystal Drive, Arlington, Virginia, 

22202. To attend the listening session, 

register by October 20, 2009, via e-mail 

at saundkat@versar.com (subject line: 

Hydrogen Cyanide and Cyanide Salts 

listening session), by phone: 703–750– 

3000 extension 545, or by faxing a 

registration request 703–642–6954 

(please reference the ‘‘Hydrogen 

Cyanide and Cyanide Salts Listening 

Session’’ and include your name, title, 

affiliation, full address and contact 

information). Please note that to gain 

entrance to this EPA building to attend 

the meeting, attendees must have photo 

identification with them and must 

register at the guard’s desk in the lobby. 

The guard will retain your photo 

identification and will provide you with 

a visitor’s badge. At the guard’s desk, 

attendees should give the name 

Christine Ross and the telephone 

number, 703–347–8592, to the guard on 

duty. The guard will contact Ms. Ross 

who will meet you in the reception area 

to escort you to the meeting room. When 

you leave the building, please return 

your visitor’s badge to the guard and 

you will receive your photo 

identification. 

A teleconference line will also be 

available for registered attendees/ 

speakers. The teleconference number is 

866–299–3188 and the access code is 

926–378–7897, followed by the pound 

sign (#). The teleconference line will be 

activated at 8:45 a.m., and you will be 

asked to identify yourself and your 

affiliation at the beginning of the call. 

Information on Services for 

Individuals with Disabilities: EPA 

welcomes public attendance at the 

‘‘Hydrogen Cyanide and Cyanide Salts 

Listening Session’’ and will make every 

effort to accommodate persons with 

disabilities. For information on access 

or services for individuals with 

disabilities, please contact Christine 

Ross at 703–347–8592 or 

ross.christine@epa.gov. To request 

accommodation of a disability, please 

contact Ms. Ross, preferably at least 10 

days prior to the meeting, to give EPA 

as much time as possible to process 

your request. 

FOR FURTHER INFORMATION CONTACT: For 

information on the public comment 

period, contact the Office of 

Environmental Information Docket; 

telephone: 202–566–1752; facsimile: 

202–566–1753; or e-mail: 

ORD.Docket@epa.gov. 

For information on the public 

listening sessions, please contact 

Christine Ross, IRIS Staff, National 

Center for Environmental Assessment, 

(8601P), U.S. EPA, 1200 Pennsylvania 

Avenue, NW., Washington, DC 20460; 

telephone: 703–347–8592; facsimile: 

703–347–8689; or e-mail: 

ross.christine@epa.gov. 

If you have questions about the 

document, contact Kathleen Newhouse, 

National Center for Environmental 

Assessment (NCEA),1200 Pennsylvania 

Ave 8601P, Washington DC, 20460; 

telephone: 703–347–8641; facsimile: 

703–347–8689; or e-mail: 

newhouse.kathleen@epa.gov. 

SUPPLEMENTARY INFORMATION: 

I. Information About IRIS 

IRIS is a database that contains 

potential adverse human health effects 

information that may result from 

chronic (or lifetime) exposure to specific 

chemical substances found in the 

environment. The database (available on 

the Internet at http://www.epa.gov/iris) 

contains qualitative and quantitative 

health effects information for more than 

540 chemical substances that may be 

used to support the first two steps 

(hazard identification and doseresponse evaluation) of a risk 

assessment process. When supported by 

available data, the database provides 

oral reference doses (RfDs) and 

inhalation reference concentrations 

(RfCs) for chronic health effects, and 

oral slope factors and inhalation unit 

risks for carcinogenic effects. Combined 

with specific exposure information, 

government and private entities can use 

IRIS data to help characterize public 

health risks of chemical substances in a 

site-specific situation and thereby 

support risk management decisions 

designed to protect public health. 

II. How to Submit Technical Comments 

to the Docket at http:// 

www.regulations.gov 

Submit your comments, identified by 

Docket ID No. EPA–HQ–ORD–2009– 

0245 by one of the following methods: 

• http://www.regulations.gov: Follow 

the on-line instructions for submitting 

comments. 

• E-mail: ORD.Docket@epa.gov. 

• Fax: 202–566–1753. 

• Mail: Office of Environmental 

Information (OEI) Docket (Mail Code: 

2822T), U.S. Environmental Protection 

Agency, 1200 Pennsylvania Ave., NW., 

Washington, DC 20460. The phone 

number is 202–566–1752. 

• Hand Delivery: The OEI Docket is 

located in the EPA Headquarters Docket 

Center, EPA West Building, Room 3334, 

1301 Constitution Ave., NW., 

Washington, DC. The EPA Docket 

Center’s Public Reading Room is open 

from 8:30 a.m. to 4:30 p.m., Monday 

through Friday, excluding legal 

holidays. The telephone number for the 

Public Reading Room is 202–566–1744. 

Such deliveries are only accepted 

during the docket’s normal hours of 

operation, and special arrangements 

should be made for deliveries of boxed 

information. If you provide comments 

by mail or hand delivery, please submit 

one unbound original with pages 

numbered consecutively, and three 

copies of the comments. For 

attachments, provide an index, number 

pages consecutively with the comments, 

and submit an unbound original and 

three copies. 

Instructions: Direct your comments to 

Docket ID No. EPA–HQ–ORD–2009– 

0245. Please ensure that your comments 

are submitted within the specified 

comment period. Comments received 

after the closing date will be marked 

‘‘late,’’ and may only be considered if 

time permits. It is EPA’s policy to 

include all comments it receives in the 

public docket without change and to 

make the comments available online at 

http://www.regulations.gov, including 

any personal information provided, 

unless a comment includes information 

claimed to be Confidential Business 

Information (CBI) or other information 

whose disclosure is restricted by statute. 

Do not submit information that you 

consider to be CBI or otherwise 

protected through 

http://www.regulations.gov or e-mail. 

The http://www.regulations.gov Web 

site is an ‘‘anonymous access’’ system, 

which means EPA will not know your 

identity or contact information unless 

you provide it in the body of your 

comment. If you send an e-mail 

comment directly to EPA without going 

through 

http://www.regulations.gov, your e-mail 

address will be automatically captured 

and included as part of the comment 

that is placed in the public docket and 

made available on the Internet. If you 

submit an electronic comment, EPA 

recommends that you include your 

name and other contact information in 

the body of your comment and with any 

disk or CD–ROM you submit. If EPA 

cannot read your comment due to 

technical difficulties and cannot contact 

you for clarification, EPA may not be 

able to consider your comment. 

Electronic files should avoid the use of 

special characters, any form of 

encryption, and be free of any defects or 

viruses. For additional information 

about EPA’s public docket visit the EPA 

Docket Center homepage at 

http://www.epa.gov/epahome/ 

dockets.htm. 

Docket: All documents in the docket 

are listed in the 

mstockstill on DSKH9S0YB1PROD with NOTICES

Federal Register / Vol. 74, No. 183 / Wednesday, September 23, 2009 / Notices 48541 

http://www.regulations.gov index. 

Although listed in the index, some 

information is not publicly available, 

e.g., CBI or other information whose 

disclosure is restricted by statute. 

Certain other material, such as 

copyrighted material, will be publicly 

available only in hard copy. Publicly 

available docket materials are available 

either electronically in 

http://www.regulations.gov or in hard 

copy at the OEI Docket in the EPA 

Headquarters Docket Center. 

Dated: August 21, 2009. 

Rebecca Clark, 

Acting Director, National Center for 

Environmental Assessment. 

[FR Doc. E9–22912 Filed 9–22–09; 8:45 am] 

BILLING CODE 6560–50–P 

ENVIRONMENTAL PROTECTION 

AGENCY 

[EPA–HQ–OW–2009–0297; FRL–8961–8] 

RIN 2040–AF08 

Drinking Water: Perchlorate 

Supplemental Request for Comments 

AGENCY: Environmental Protection 

Agency (EPA). 

ACTION: Reopening of public comment 

period. 

SUMMARY: In an August 19, 2009, 

Federal Register notice, EPA announced 

that it was seeking comments on 

additional approaches to analyzing data 

related to the Agency’s preliminary 

regulatory determination for 

perchlorate. The additional comments 

are sought in an effort to ensure 

consideration of all the potential 

options for evaluating whether there is 

a meaningful opportunity for human 

health risk reduction of perchlorate 

through a national primary drinking 

water rule. In response to requests from 

several stakeholders, this action reopens 

the public comment period for an 

additional 15 days. 

DATES: EPA must receive your 

comments on or before October 8, 2009. 

ADDRESSES: Submit your comments, 

identified by Docket ID No. EPA–HQ– 

OW–2009–0297, by one of the following 

methods: 

• http://www.regulations.gov: Follow 

the on-line instructions for submitting 

comments. 

• Mail: Water Docket, Environmental 

Protection Agency, Mailcode: 2822T, 

1200 Pennsylvania Ave., NW., 

Washington, DC 20460. 

• Hand Delivery: Water Docket, EPA 

Docket Center (EPA/DC) EPA West, 

Room 3334, 1301 Constitution Ave., 

NW., Washington, DC. Such deliveries 

are only accepted during the Docket’s 

normal hours of operation, and special 

arrangements should be made for 

deliveries of boxed information. 

Instructions: Direct your comments to 

Docket ID No. EPA–HQ–OW–2009– 

0297. EPA’s policy is that all comments 

received will be included in the public 

docket without change and may be 

made available online at http:// 

www.regulations.gov, including any 

personal information provided, unless 

the comment includes information 

claimed to be Confidential Business 

Information (CBI) or other information 

whose disclosure is restricted by statute. 

Do not submit information that you 

consider to be CBI or otherwise 

protected through http:// 

www.regulations.gov or e-mail. The 

http://www.regulations.gov Web site is 

an ‘‘anonymous access’’ system, which 

means EPA will not know your identity 

or contact information unless you 

provide it in the body of your comment. 

If you send an e-mail comment directly 

to EPA without going through http:// 

www.regulations.gov your e-mail 

address will be automatically captured 

and included as part of the comment 

that is placed in the public docket and 

made available on the Internet. If you 

submit an electronic comment, EPA 

recommends that you include your 

name and other contact information in 

the body of your comment and with any 

disk or CD–ROM you submit. If EPA 

cannot read your comment due to 

technical difficulties and cannot contact 

you for clarification, EPA may not be 

able to consider your comment. 

Electronic files should avoid the use of 

special characters, any form of 

encryption, and be free of any defects or 

viruses. 

FOR FURTHER INFORMATION CONTACT: Eric 

Burneson, Office of Ground Water and 

Drinking Water, Standards and Risk 

Management Division, at (202) 564– 

5250 or e-mail burneson.eric@epa.gov. 

For general information contact the EPA 

Safe Drinking Water Hotline at (800) 

426–4791 or e-mail: hotlinesdwa@epa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

The statutory and regulatory 

background is described in detail in the 

October 10, 2008, Federal Register 

notice of a preliminary regulatory 

determination for perchlorate (73 FR 

60262) and summarized in the August 

19, 2009, Federal Register notice of 

supplemental request for comments (74 

FR 41883). Briefly, the Safe Drinking 

Water Act (SDWA) section 1412, as 

amended in 1996, requires EPA to make 

a determination whether to regulate at 

least 5 contaminants from its 

contaminant candidate list (CCL) every 

5 years. To regulate a contaminant in 

drinking water, EPA must determine 

that it meets three criteria: (1) The 

contaminant may have an adverse effect 

on human health, (2) the contaminant is 

known to occur or there is a substantial 

likelihood that the contaminant will 

occur in public water systems with a 

frequency and at levels of public health 

concern, and (3) regulation of such 

contaminant presents a meaningful 

opportunity for health risk reduction for 

persons served by public water systems. 

On October 10, 2008, EPA published 

a preliminary regulatory determination 

for perchlorate, requesting public 

comment on its determination that 

perchlorate did not meet the second and 

third criteria for regulation. On 

November 12, 2008, EPA published a 

Federal Register Notice (73 FR 66895) 

reopening the comment period for the 

preliminary regulatory determination 

for an additional 15 days. The Agency 

received 32,795 comment letters on the 

preliminary regulatory determination 

for perchlorate. These comments and 

other supporting materials for the 

October 10, 2008, notice are available 

electronically at http:// 

www.regulations.gov (Docket ID No. 

EPA–HQ–OW–2008–0692). 

On August 19, 2009, EPA published a 

Federal Register notice of supplemental 

request for comment on a broader range 

of alternatives for interpreting the 

available data on: the level of health 

concern, the frequency of occurrence of 

perchlorate in drinking water, and the 

opportunity for health risk reduction 

through a national primary drinking 

water standard. These alternative 

interpretations may impact the Agency’s 

final regulatory determination for 

perchlorate. The supporting materials 

for the August 19, 2009, supplemental 

notice are available electronically at 

http://www.regulations.gov (Docket ID 

No. EPA–HQ–OW–2009–0297). 

Next Steps 

Several stakeholders have requested 

an extension to the September 18, 2009, 

comment deadline specified in the 

August 19, 2009, supplemental notice in 

order to evaluate EPA’s alternative 

analyses and prepare comments. This 

action reopens the comment period for 

an additional 15 days. 

The Agency will consider the 

information and comments submitted in 

response to the August 19, 2009, 

supplemental notice until October 8, 

2009. EPA will also consider the 

comments received on the previous 

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