8-hour total weight average (TWA) permissible exposure limit (PEL).

OSHA requirements are set by statute, standards and regulations. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. This letter constitutes OSHA's interpretation of the requirements discussed. Note that our enforcement guidance may be affected by changes to OSHA rules. Also, from time to time we update our guidance in response to new information. To keep apprised of such developments, you can consult OSHA's website at https://www.osha.gov.

October 6, 1995

Mr. Mark Nicas
University of California
Environmental Health Sciences
School of Public Health
140 Warren Hall
Berkeley, California 94720-7360

Dear Mr. Nicas:

This is in response to your letter of July 7, addressed to Mr. Joseph A. Dear, Assistant Secretary for the Occupational Safety and Health Administration (OSHA), requesting an interpretation on 8-hour total weight average (TWA) permissible exposure limit (PEL) as defined in 29 CFR 1910.1000 and in other substance-specific health standards.

The exemption afforded under the benzene standard for oil and gas drilling, production, and servicing operations.

Archive Notice - OSHA Archive

NOTICE: This is an OSHA Archive Document, and may no longer represent OSHA Policy. It is presented here as historical content, for research and review purposes only.

OSHA requirements are set by statute, standards and regulations. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. This letter constitutes OSHA's interpretation of the requirements discussed. Note that our enforcement guidance may be affected by changes to OSHA rules. Also, from time to time we update our guidance in response to new information. To keep apprised of such developments, you can consult OSHA's website at https://www.osha.gov.

November 30, 1995

Mr. Larry R. Durio
Durio Consulting Services
8762 Quarters Lake Road
Baton Rouge, Louisiana 70809

Dear Mr. Durio:

Respirator Concerns.

Archive Notice - OSHA Archive

NOTICE: This is an OSHA Archive Document, and may no longer represent OSHA Policy. It is presented here as historical content, for research and review purposes only.

OSHA requirements are set by statute, standards and regulations. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. This letter constitutes OSHA's interpretation of the requirements discussed. Note that our enforcement guidance may be affected by changes to OSHA rules. Also, from time to time we update our guidance in response to new information. To keep apprised of such developments, you can consult OSHA's website at https://www.osha.gov.

June 13, 1996

Robb Menzies, President
ACE Systems, Ltd.
945 Malory Street
Lafayette, Colorado 80026

Dear Mr. Menzies:

We are in receipt of your letter forwarded to our office from Dr. Gerry Ryan, Assistant Regional Administrator for Technical Support in the Occupational Safety and Health Administration (OSHA) Region VIII. This letter will only address the respirator concerns expressed in your original letter to Region VIII. We understand that the other issues you raised were addressed by Dr. Ryan in his response to you dated February 27, 1996.

Benzene Standard; Extension of the Office of Management of Budget's (OMB) Approval of Information Collection (Paperwork) Requirements

  • Publication Date:
  • Publication Type:
  • Fed Register #:
    64:72366-72367
  • Title:

DEPARTMENT OF LABOR

Occupational Safety and Health Administration

[Docket No. ICR-1218-0129(2000)]

Benzene Standard; Extension of the Office of Management of Budget's (OMB) Approval of Information Collection (Paperwork) Requirements

AGENCY: Occupational Safety and Health Administration (OSHA); Labor.

ACTION: Notice of an opportunity for public comment.

Standard on Benzene; Extension of the Office of Management and Budget's (OMB) Approval of Information-Collection (Paperwork) Requirements

  • Publication Date:
  • Publication Type:
  • Fed Register #:
    68:13732-13733
  • Title:

DEPARTMENT OF LABOR

Occupational Safety and Health Administration

[Docket No. ICR-1218-0129(2003)]

Standard on Benzene; Extension of the Office of Management and Budget's (OMB) Approval of Information-Collection (Paperwork) Requirements

AGENCY: Occupational Safety and Health Administration (OSHA), Labor.

ACTION: Request for comment.

Standard on Benzene; Extension of the Office of Management and Budget's (OMB) Approval of Information Collection (Paperwork) Requirements

  • Publication Date:
  • Publication Type:
  • Fed Register #:
    71:29986-29987
  • Title:
    [Federal Register: May 24, 2006 (Volume 71, Number 100)][Notices]               [Page 29986-29987]
    From the Federal Register Online via GPO Access [wais.access.gpo.gov]
    [DOCID:fr24my06-129]                         

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    DEPARTMENT OF LABOR

    Occupational Safety and Health Administration

    [Docket No.