Federal Register / Vol. 73, No. 17 / Friday, January 25, 2008 / Notices 4579 

• Device must not continue to burn 

for more than 5 seconds 

• No component that secures the 

device to the user’s body or that secures 

the cylinder must come off or be 

displaced 

• Breathing resistance as per EN 137 

are met 

• The test head must not continue to 

burn for more than 5 seconds. 

The closed-circuit self-contained 

breathing apparatus used in the test 

witnessed by NIOSH/NPPTL personnel 

successfully passed all of the listed 

criteria. 

Additionally, the National Institute of 

Standards and Technology (NIST), 

Building and Fire Research Laboratory, 

Fire Research Division has provided a 

computational fluid dynamic (CFD) 

study of oxygen dissipation into the 

environment surrounding a respirator 

facepiece. For this study, 3-dimensional 

scans were taken of actual heads and 

masks for use in the CFD software. Leak 

geometries representing an imperfect 

seal were defined. Other variables 

included oxygen concentration fields 

and flow streamlines for multiple 

combinations of fuel and air in the 

surrounding environment, content of 

the leak, various breathing patterns, etc. 

Conclusions reached during the study 

were: 

• Oxygen expelled through leak in 

respirator is propelled away from head 

region through advection and dissipates 

through diffusion. 

• Risk of flammable mixture near 

head is observed in 10% propane 

environment. 

• This is an extreme environment 

(fuel-rich, near flammable mixture.) 

• In case of flammable environment, 

oxygen leak results in small, fuel-lean 

region near head. 

• In fuel-lean environment, oxygen 

further decreases fuel concentration. 

NIST Technical Note 1484 titled, ‘‘A 

Computational Model of Dissipation of 

Oxygen from an Outward Leak of a 

Closed-Circuit Breathing Device’’

available through the internet at this 

link, http://fire.nist.gov/bfrlpubs/fire07/ 

PDF/f07024.pdf chronicles the research 

work completed by NIST. 

Through this announcement, NIOSH/ 

NPPTL is seeking input from 

stakeholders and manufacturers to 

determine the following: 

1. Opinion on the current prohibition. 

2. Provide supporting data to 

maintain, modify, or rescind the current 

prohibition. 

3. If additional research is needed to 

support rescinding the prohibition, 

what would it entail? 

4. Willingness to participate in a 

collaborative agreement with NIOSH/ 

NPPTL to conduct research on this topic 

and support willing to provide. 

5. Other comments on the subject. 

Public Comment Period: Submit input 

to the NIOSH Docket Office within 60 

days after the date of publication of this 

notice in the Federal Register. 

Reference Docket Number NIOSH–123 

in comments. 

ADDRESSES: Input can be submitted by: 

• Mail: NIOSH Docket Office, Robert 

A. Taft Laboratories, M/S C 34, CC 

SCBA O2 Prohibition—NIOSH Docket 

Number 123, 4676 Columbia Parkway, 

Cincinnati, OH 45226. 

• E-mail: niocindocket@cdc.gov. 

• Fax: (513) 533–8285. 

• Phone: (513) 533–8303. 

• NPPTL Web Site: http:// 

www.cdc.gov/niosh/npptl. 

Contact Person for Technical 

Information: Timothy R. Rehak at 412–

386–6866 or e-mail: ter1@cdc.gov. 

Dated: January 16, 2008. 

James D. Seligman, 

Chief Information Officer, Centers for Disease 

Control and Prevention. 

[FR Doc. E8–1273 Filed 1–24–08; 8:45 am] 

BILLING CODE 4163–18–P 

DEPARTMENT OF HEALTH AND 

HUMAN SERVICES 

Administration for Children and 

Families 

Submission for OMB Review; 

Comment Request 

Title: April 2008 Current Population 

Survey Supplement on Child Support. 

OMB No.: 0992–0003. 

Description: Collection of these data 

will assist legislators and policymakers 

in determining how effective their 

policymaking efforts have been over 

time in applying the various child 

support legislation to the overall child 

support enforcement picture. This 

information will help policymakers 

determine to what extent individuals on 

welfare would be removed from the 

welfare rolls as a result of more 

stringent child support enforcement 

efforts. 

Respondents: Individuals and 

households. 

ANNUAL BURDEN ESTIMATES

Instrument Number of 

respondents 

Number of responses per 

respondent 

Average 

burden 

hours per 

response 

Total burden 

hours 

Child Support Survey ....................................................................................... 41,300 1 .0241666 998 

Estimated Total Annual Burden 

Hours: 998 

Additional Information: Copies of the 

proposed collection may be obtained by 

writing to the Administration for 

Children and Families, Office of 

Administration, Office of Information 

Services, 370 L’Enfant Promenade, SW., 

Washington, DC 20447, Attn: ACF 

Reports Clearance Officer. All requests 

should be identified by the title of the 

information collection. E-mail address: 

infocollection@acf.hhs.gov. 

OMB Comment: OMB is required to 

make a decision concerning the 

collection of information between 30 

and 60 days after publication of this 

document in the Federal Register. 

Therefore, a comment is best assured of 

having its full effect if OMB receives it 

within 30 days of publication. Written 

comments and recommendations for the 

proposed information collection should 

be sent directly to the following: Office 

of Management and Budget, Paperwork 

Reduction Project, Fax: 202–395–6974, 

Attn: Desk Officer for the 

Administration for Children and 

Families. 

Dated: January 17, 2008. 

Janean Chambers, 

Reports Clearance Officer. 

[FR Doc. 08–267 Filed 1–24–08; 8:45 am] 

BILLING CODE 4184–01–M 


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