He has been employed by the Department since 2002. His duties include statewide billing of, and tracking of payments from facilities that are required to maintain an account for annual environmental monitor fees with the Department. Among other duties, he maintains a list of permittees required to pay annual environmental monitor fees. See Affidavit of Shawn Vitas, sworn to June 16, 2015 ("Vitas Aff."), Ex. 2, at first unnumbered page.