CHAIRMAN:

Paul L. Ziemer, Ph.D.
Lafayette, Indiana

MEMBERS:

Josie Beach
Richland, Washington

Bradley P. Clawson
Rexburg, Idaho

Michael H. Gibson
Franklin, Ohio

Mark A. Griffon
Salem, New Hampshire

James E. Lockey, M.D.
Cincinnati, Ohio

James M. Melius, M.D., Ph.0.
Albany, New York

Wanda |. Munn
Richland, Washington

John W. Poston, Sr., Ph.D.
College Station, Texas

Robert W. Presley
Clinton, Tennessee

Genevieve S. Roessler, Ph.D.

Elysian, Minnesota

Phillip Schofield
Bosque Farm, New Mexico

STAFF:

EXECUTIVE SECRETARY:

Lewis V. Wade, Ph.D
Washington, DC

COMMITTEE MANAGEMENT :

LaShawn D. Shields
Atlanta, Georgia

ADVISORY BOARD ON RADIATION AND WORKER HEALTH
4676 Columbia Parkway, MS: C-46
Cincinnati, Ohio 45226
(513) 533-6825

July 2, 2007

The Honorable Michael O. Leavitt
Secretary of Health and Human Services
Department of Health and Human Services
200 Independence Avenue, S.W.
Washington, DC 20201

Dear Mr. Secretary:

The Advisory Board on Radiation and Worker Health (The Board) has
evaluated SEC Petition-0030 concerning workers at the Rocky Flats
facility in Denver, under the statutory requirements established by
EEOICPA and incorporated into 42 CFR Sec. 83.13 and 42 CFR Sec.
83.14. The Board respectfully recommends Special Exposure Cohort
(SEC) status be accorded to all employees of the DOE, its predecessor
agencies, or DOE contractors or subcontractors who were monitored or
should have been monitored for neutron exposures while working at the
Rocky Flats facility in Denver, Colorado for a number of work days
aggregating at least 250 work days during the period from April 1, 1952
through December 31, 1958, or in combination with work days within the
parameters established for one or more other classes of employees in the
SEC. The Board finds that although there are insufficient data available to
reconstruct neutron dose with sufficient accuracy for all members of the
class during this time period, the Board believes that NIOSH may be able
to reconstruct other components of the internal and external dose, and
therefore individuals with non-presumptive cancers may be considered for
partial dose reconstructions.

This recommendation is based on the following factors:

e Many of the highest exposed individuals at Rocky Flats were not
monitored for neutron exposure during this time period. In addition,
there were significant process changes during this time period which
makes it infeasible to use data from later periods to estimate neutron
doses for the time period of concern. Further, observed large variations
between individual neutron dose rates (mrem/day) and neutron photon
ratios suggest that a building level correction factor is not adequate for
purposes of estimating individual doses.


The Honorable Michael O. Leavitt July 2, 2007

e The Board believes that health may have been endangered for the workers exposed to radiation
at the Rocky Flats facility within the time period in question.

Enclosed is supporting documentation from the Advisory Board Meeting held in Denver

(Westminster), Colorado on May 2-4, 2007 and other meetings where this special exposure cohort
class was discussed. If any of these items are unavailable at this time, they will follow shortly.

Sincerely,

Paul L. Ziemer, Ph.D
Chairman

Enc.