Thermal desorbers remove organic constituents from solids by raising the temperature of the contaminated material to a sufficiently high level to effect contaminant volatilization and transfer to a gas stream. Technical requirements focus on achieving contaminant removal, fugitive emissions control, mechanical operability of the primary treatment equipment and efficient fuel combustion (where appropriate). This document specifies minimum technical requirements for the permitting/approval to operate thermal desorption. The requirements presented in this document are directed toward relatively small, short term, on-site projects as opposed to permanent treatment, storage and disposal (TSD) facilities.