You’ll need to implement an ongoing IAQ plan based on the U.S. Environmental Protection Agency (EPA) document, Building Air Quality: A Guide for Building Owners and Facility Managers, EPA reference number 402-F-91-102, December 1991 (see Resources). This document is long (over 200 pages!) and covers the general IAQ issues in addition to mold that you’ll need to address for your IAQ plan. See the Documentation Toolkit for the IAQ Management Plan Guidelines, which gives specific guidance on sections of the EPA document to pay close attention to.