Division of Compensation Analysis and 

Support 

Program Evaluation Report

Document Number: DCAS-PER-064

Effective Date: 11/16/2015 

Revision No. 0

DuPont Deep Water Works Page 1 of 2 

Author: Signature on file Date: 11/16/2015 

 Dave Allen, HP Team Leader 

Approval: Signature on file Date: 11/16/2015 

 J.W. Neton, Associate Director for Science

Supersedes: None

RECORD OF ISSUE/REVISIONS

ISSUE EFFECTIVE REV. NO. DESCRIPTION

AUTHORIZATION DATE

DATE

New document to determine the effect of 

11/16/2015 11/16/2015 0 the revision to DCAS-TKBS-0006, 

(DuPont Deep Water Works) on 

previously completed claims.

 

1.0 Description 

Dose reconstructions for the claims from the DuPont Deep Water Works site were 

originally performed using Appendix B of Battelle-TBD-6001 issued on 12/16/2007. 

Battelle-TBD-6001 was cancelled and the Appendix was converted to a standalone TBD, 

DCAS-TKBS-0006. Revision 0 of this TBD was issued on 2/15/2011. Revision 1 was 

issued on 12/13/2013 and revision 2 was issued on 3/20/2015. This PER (DCAS-PER064) evaluates the effect of revision 2 on all previously completed claims. 

2.0 Issue Evaluation 

Revision 0 of the DCAS TBD was issued to create a standalone document after BattelleTBD-6001 was cancelled. That required a different external dose model than the default 

TBD-6001 model. As a result, the operational period external doses were different than 

Appendix B. Some of those values increased while others decreased. 

Revision 1 of the TBD was issued to address comments from the Advisory Board. 

Operational period inhalation intakes and external dose rates increased in revision 1 as 

well as ingestion intakes in the residual contamination period. 

An additional review was conducted by the Advisory Board that found an error in the 

ingestion intake rates in the residual contamination period. This error was corrected in 

revision 2 of the TBD issued 3/20/2015. 
Division of Compensation Analysis and 

Support

Program Evaluation Plan

Document Number: DCAS-PER-064

Effective Date: 11/16/2015 Revision No. 0 Page 2 of 2

The increases in dose discussed above encompass all employees through all years. 

Therefore, it was not necessary to itemize any other increases in dose or further 

breakdown the time periods affected. 

3.0 Plan for Resolution or Corrective Action 

In order to evaluate the effect of revision 2 of the TBD on all previously completed 

claims, a search was conducted for all completed claims with employment at DuPont 

Deepwater Works that had a probability of causation (POC) of less than 50%. This 

search identified 56 claims. 

A new dose estimate was performed for all 56 claims using revision 2 of the TBD, as 

well as all other applicable approved dose reconstruction methods. The resulting 

probability of causation (POC) was below 45% for 54 claims and greater than 50% for 

one claim. The remaining claim resulted in a POC between 45% and 50%. For that

claim, IREP was run 30 times at 10,000 iterations per NIOSH procedures. The resulting 

POC remained below 50%.

NIOSH will provide the Department of Labor with the list of all claims evaluated under 

this PER. Further, NIOSH will request the return of the one claim that would now result 

in a POC greater than 50%.