A Fairfax County "time capsule" that was ceremonially packed by county officials yesterday contains two miniature bottles of Virginia Gentleman bourbon and a collection of documents including the 1976-77 county budget and combudget or land use plan.

No one suggested at the ceremony in the Board of Supervisors room in the County office Building that the bourbon (distilled in Reston) was provided to aid future readers in comprehending the plan.

Rather, the capsule was addressed to the "governing body of Fairfax County in the year A.D. 2076 . . . in the hope that . . . you may gain some insight into our lives . . . in the Bicentennial Year of our Nation.

Among the items packed into an 11-inch by 14-inch by 15-inch stainless steel box were pamphlets describing historic landmarks, a typical agenda of the Board of Supervisors' weekly meetings, demographic, economic and statistical information and a video tape of Fairfax's bicentennial ceremony held last June.

The box will be sent to Richmond where it will be filled with an inert gas to prevent deterioration. Then it will be returned to Fairfax and buried in concrete beneath the brick sidewalk in front of the 177-year-old County Courthose at Main Street and Chain Bridge Road.