[Code of Federal Regulations]
[Title 40, Volume 24]
[Revised as of July 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR194.55]

[Page 56]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 194_CRITERIA FOR THE CERTIFICATION AND RE-CERTIFICATION OF THE WASTE 
ISOLATION PILOT PLANT'S COMPLIANCE WITH THE 40 CFR PART 191 DISPOSAL 
REGULATIONS--Table of Contents
 
         Subpart C_Compliance Certification and Re-certification
 
Sec. 194.55  Results of compliance assessments.

    (a) Compliance assessments shall consider and document uncertainty 
in the performance of the disposal system.
    (b) Probability distributions for uncertain disposal system 
parameter values used in compliance assessments shall be developed and 
documented in any compliance application.
    (c) Computational techniques which draw random samples from across 
the entire range of values of each probability distribution developed 
pursuant to paragraph (b) of this section shall be used to generate a 
range of:
    (1) Estimated committed effective doses received from all pathways 
pursuant to Sec. 194.51 and Sec. 194.52;
    (2) Estimated radionuclide concentrations in USDWs pursuant to Sec. 
194.53; and
    (3) Estimated dose equivalent received from USDWs pursuant to Sec. 
194.52 and Sec. 194.53.
    (d) The number of estimates generated pursuant to paragraph (c) of 
this section shall be large enough such that the maximum estimates of 
doses and concentrations generated exceed the 99th percentile of the 
population of estimates with at least a 0.95 probability.
    (e) Any compliance application shall display:
    (1) The full range of estimated radiation doses; and
    (2) The full range of estimated radionuclide concentrations.
    (f) Any compliance application shall document that there is at least 
a 95 percent level of statistical confidence that the mean and the 
median of the range of estimated radiation doses and the range of 
estimated radionuclide concentrations meet the requirements of Sec. 
191.15 and part 191, subpart C of this chapter, respectively.