Certain exemptions may apply to determine whether more than a threshold amount of a regulated substance is present at a stationary source under 40 CFR Part 68. One exemption is for regulated substances that are “manufactured, processed, or used in a laboratory at a stationary source under the supervision of a technically qualified individual as defined in §720.3(ee) of this chapter” (40 CFR §68.115(b)(6)). What is the definition of a “technically qualified individual” and what does “§720.3(ee) of this chapter” refer to?