The Fairfax County Board of Supervisors Monday approved rezoning 37 acres in McLean for expansion of Westpark industrial and research park.

The expansion of the park, located across from Tyson's Corner on Rt. 123, will allow construction of mid-rise and high-rise buildings. The wooded property slated for the expansion is east of Spring Hill Road and south of the Dulles Access Road. Its use as an industrial park complies with the county's land use plan.

Representatives of two nearby communities expressed opposition to aspects of the expansion.

Stephen J. Mancuso of McLean Hamlet, located across from the planned expansion on the Dulles Access Road, said a wooded 25-foot buffer zone that the applicants, Westpark Associates, propose to leave between the park addition and the Dulles Road is not adequate.

Leon Gamble, representing the small Odricks community near the Westpark site, said that a traffic ramp the applicant proposes to build onto the Dulles Access Road "will further damage our community that already has been split by the building of the Dulles Access Road."

A county staff spokesman said that park's 25-foot buffer zone is adequate since the Dulles Access Road provides a sort of buffer in itself. He added that the traffic ramp, if built by the applicant, would be located on the south side of the Dulles road while the Odricks community is on the north side.

In other rezoning cases Monday, the board approved an application from Carol A. and Homer E. Henry of Fairfax to rezone about six acres of land to allow construction of 20 single-family homes on a site near the intersection of Edgelea and Courthouse roads, and denied an application from George S. Vouvalis of Arlington who proposed to build two homes on a .513 acre site near the intersection of Columbia Pike and Oak Hill Drive in Fairfax.