The Government intends to issue a sole source modification to one source, CSC, 3160 Fairview Park Drive, Falls Church 22042-4516, at current contract prices under the authority FAR 16.505(b)(2)(i)(B); Only one source is capable of providing the supplies or services required at the level of quality required because the supplies or services are unique or highly specialized. Interested persons may identify their interest and capability to respond to the requirement or submit proposals. A determination by the Government not to compete this action based upon responses to this notice is solely within the discretion of the Government. The resultant contract will be firm fixed price. Verbal requests will not be acted upon. The North American Industry Classification System (NAICS) Code is 541512. All questions and comments should be addressed to Mary Andich, Contracting Officer, (618) 256-9942, and e-mail at [email protected]