13 
Dr. McKinney thought this motion recognized the fact that the HEPA filter does 
not absolutely prevent release of organisms into the environment. 
Dr. Tblin asked if Appendix K-III-D and K-IV-D should also be so modified. 
Dr. McKinney felt the concept "prevent" should be cperative in these sections 
vvhich apply to P2-LS and P3-LS; through the combined use of HEPA filters and 
incinerators release can be prevented. 
By a vote of four in favor, two opposed, and no abstentions, the working group 
recommended the proposed modification be published in the Federal Register and 
forwarded to RAC for consideration. 
"Section Appendix K-II-D would read : 
'Appendix K-II-D. Exhaust gases ranoved frcm a closed system 
or other primary containment shall be treated by filters 
vhich have efficiencies equivalent to HEPA filters or by 
other equivalent procedures (e.g., incineration) to mini- 
mize release of viable organisms containing recombinant ENA 
molecules to the environment . ' " 
Dr. McKinney adjourned the sixth meeting of the Large-Scale Review Working 
Group at 12:10 p.m. on February 7, 1984. 
[349] 
