This addendum addresses a number of issues. It adds definitions of the terms ?indoor air,? ?cognizant authority,? and ?industrial space?; it modifies three existing definitions in an attempt to clarify language; and it updates the references section of the standard. It also revises Appendix D to be consistent with the revised Indoor Air Quality Procedure. Finally, it deletes Appendix F, which is no longer referred to in the standard and which is more appropriate for the guideline being developed as a companion document to Standard 62.