The Al-Safir complex in northern Syria houses a Scud missile base, missile storage, chemical weapons production, and weaponization and testing facilities. [1] In 2009, a Jane's satellite image analysis revealed that extensive construction took place at the site between 2005 and 2008, which now consists of three chemical weapons production facilities and a warhead and Scud storage facility. [2] Damascus has deployed a considerable number of Scud-D missiles at the adjacent missile base, which Syria may have armed with chemical weapons warheads. [3] The complex includes extensive fortified underground bunkers in which Syria stores the missiles and their launchers. [4] Damascus protects the complex with extensive perimeter defenses, checkpoints and SAM-2 batteries.[5]

Sources:
[1] Damien McElroy, "Syria's 'Chemical Weapons Factories' Seen from Space," The Daily Telegraph, 19 February 2009.
[2] "Chemical Romance — Syria's Unconventional Affair Develops," Jane's Intelligence Review, 12 February 2009, www.janes.com.
[3] "Chemical Romance — Syria's Unconventional Affair Develops," Jane's Intelligence Review, 12 February 2009, www.janes.com.
[4] Yaakov Katz, "Syria Building Chemical Weapons Plant," The Jerusalem Post, 17 February 2009, www.jpost.com.
[5] "Images Depict Syrian Chemical Weapons Site," UPI, 18 February 2009.