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Pacific Proving Grounds (PPG)

(Site Profile/Docket Number 080)

Location: Marshall Islands, Marshall Islands

Also known as: The Pacific Proving Grounds included Bikini Atoll, Enewetak Atoll, Johnston Island (nuclear weapons testing activities only), and Christmas Island (U. S. nuclear weapons testing activities only).

Special Exposure Cohort Petition Information

The Special Exposure Cohort (SEC) is a unique category of employees established by The Act (42 CFR Part 83). Claims compensated under the SEC do not have to go through the dose reconstruction process. To qualify for compensation under the SEC, a covered employee must meet specific requirements (e.g., must have at least one of 22 "specified cancers," and have worked for a specified time period at one of the SEC sites). Classes of employees and work sites can be considered for addition to the SEC through a NIOSH petition process. More information about the Special Exposure Cohort can be found on our Frequently Asked Questions page.

Open/Active SEC Petitions

To date, there are no open/active SEC petitions from Pacific Proving Grounds (PPG).

Class(es) Added to the SEC

  • Pacific Proving Grounds - Department of Energy (DOE) employees or DOE contractor or subcontractor employees who worked at the Pacific Proving Grounds (PPG) from 1946 through 1962 for a number of work days aggregating at least 250 work days, either solely under this employment or in combination with work days within the parameters (excluding aggregate work day requirements) established for other classes of employees included in the SEC, and who were monitored or should have been monitored

Petitions Qualified for Evaluation

Below is a list of the petitions that qualified for evaluation. Select a petition on the list to view the table for that particular petition.


Petition 201946 through 1962

Petition 20
Steps in Petition Process: Petition Details:

Date Received

January 3, 2005

Date Qualified for Evaluation

April 11, 2005

Summary of Information in Petition

Job Titles and/or Job Duties: All scientists and scientific couriers

Period of Employment: July 1, 1958 until August 31, 1958 (Operation Hardtack I)

Note: The information above is what qualified for evaluation. During our evaluation of whether dose reconstructions can adequately be completed for the above job titles and period of employment, information may cause NIOSH to change some the dates or job titles/duties. Therefore, as this petition proceeds through the SEC petition process and if an SEC class is proposed, the proposed class may not exactly match the above information.

Copy of the Petition Received

January 3, 2005 [3.44 MB (14 pages)]

Federal Register Notice Announcing that a Pacific Proving Grounds (PPG) SEC Petition has met the Minimum Qualifications for Review and Evaluation

May 5, 2005 [42 KB (1 page)]

SEC Petition Evaluation Report

SEC Petition Evaluation Report [334 KB (38 pages)] October 20, 2005

SEC Petition Evaluation Report Supplement: Pacific Proving Ground [60 KB (6 pages)] January 19, 2006

Additional Information Regarding the PPG SEC Petition:

Petition Discussed by the Advisory Board

The Advisory Board discussed the PPG petition on January 25, 2006. At that time, the Advisory Board elected to continue their discussions on the PPG SEC petition at their next regular meeting set for April 25-27, 2006.

The Advisory Board continued their discussions on the PPG petition on April 26, 2006.

Advisory Board Recommendation on SEC Petition

May 24, 2006 [357 KB (2 pages)]

HHS Letters to Congress Regarding the SEC Petition

June 26, 2006 [291 KB (7 pages)]

HHS Designation of Additional Members to the SEC


Federal Register Notice: Designation of a Class of Employees for Addition to the Special Exposure Cohort


Effective Date for the SEC Class

July 26, 2006

Federal Register Notice: Final Effect of Designation of a Class of Employees for Addition to the Special Exposure Cohort

August 4, 2006 [44 KB (1 page)]

Letter to DOL Regarding the Addition of a New Class of Employees to the SEC

July 28, 2006 [42 KB (1 page)]

Advisory Board Work Group on Pacific Proving Grounds (PPG)

This Work Group is responsible for a review of the Pacific Proving Grounds Site Profile and a review of the Site Profile by the Board's contractor (SC&A). The Work Group shall consider issues identified by SC&A concerning the Site Profile and shall assist NIOSH and SC&A in the resolution of such issues. The Work Group may recommend to the Board changes in the Site Profile as appropriate.

Please Note: As part of the procedures and processes of the Advisory Board’s Work Groups, several kinds of pre-decisional documents may be developed. These pre-decisional documents, such as white papers, matrices, working drafts, etc., are distributed among Work Group members as research and background tools to facilitate discussion and deliberation. Although discussion during a public meeting may cover pre-decisional documents, these documents often are not further revised or finalized, and thus do not reflect the final determination or evaluation of the Advisory Board and its Work Groups. Additionally, some pre-decisional documents not otherwise posted on the website may contain sensitive information, which would require an interested party to obtain such documents by filing a Freedom of Information Act (FOIA) request the CDC/ATSDR FOIA office at

Work Group Members

  • James E. Lockey (Chair)
  • Henry A. Anderson, M.D.
  • R. William Field, Ph.D., M.S.
  • Loretta R. Valerio

Meeting Information

Technical Documents

If the energy employee's personal radiation information is incomplete, NIOSH will use other sources to estimate the radiation dose. This may involve using technical documents called Site Profiles, Technical Basis Documents, and Technical Information Bulletins.

Site Profile

Advisory Board and NIOSH Comments and Discussion Papers on Pacific Proving Grounds (PPG)

The Papers on Pacific Proving Grounds (PPG) discussion papers listed below are working documents prepared by NIOSH or its contractor for use in discussions with the Advisory Board on Radiation and Worker Health or its Working Groups or Subcommittees. Draft, preliminary, interim, and white paper documents are not final NIOSH or Advisory Board (or their technical support and review contractors) positions unless specifically marked as such. These documents represent preliminary positions taken on technical issues prepared by NIOSH or its contractor.

The discussion papers have been reviewed to identify and redact any information that is protected by the Privacy Act 5 USC §552a and have been cleared for distribution.

Public Comments on Pacific Proving Grounds (PPG) Documents

How to Submit Comments

Comments on Pacific Proving Grounds (PPG) Documents can be submitted to the NIOSH Docket Officer electronically by email at or printed comments can be mailed to:

NIOSH Docket Office
Robert A. Taft Laboratories, MS-C34
1090 Tusculum Avenue
Cincinnati, OH 45226

Please include the Site Profile/Docket Number (080) on all comments.

Comments Received

At this time, no comments have been submitted on Pacific Proving Grounds (PPG) documents.

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