The Montgomery County Board of Appeals recently made the following decisions on requests for variances and special exceptions to zoning laws. For more information, call 279-1226. BETHESDA

COBALT DR., 6002 -- Granted a variance request by Sergio P. Leite to build a front vestibule onto a house 21.2 feet from the front property line instead of the minimum 25 feet required.

FERNWOOD RD., 8910 -- Granted a variance request by Lawrence Silverman to allow a concrete pad and swimming pool filter equipment 4.3 feet from a side property line instead of the minimum 12 feet required. DAMASCUS

NEW CHURCH ST., 9701 -- Granted a request by Helen W. Boyer to modify an existing special exception to permit construction of a wing to a medical clinic. OLNEY

QUEEN ELIZABETH DR., 17540 -- Granted a special exception request by Fred and Arlene Wilcox to operate a separate apartment in a private residence. POTOMAC

HARKER DR., 8408 -- Granted a variance request by Ghulam and Atia Jewayni to build a carport that would leave a total of 13 feet of open space in both side yards instead of the minimum 25 feet required. ROCKVILLE

SOUTHLAWN LA., 14824 -- Granted a variance request by Genstar Stone Products Co. to build an industrial tower 93 feet, six inches high instead of the the maximum 70-foot height allowed in an industrial zone.SILVER SPRING

GEORGIA AVE., 9331 -- Granted a special exception request by the Exxon Co. U.S.A. and Denny and Mike Garrett to rebuild an existing gas station to add a convenience store. Any modifications to gas stations require special exceptions.