Maryland health authorities, who sharply criticized Montgomery County for "incompetent management" of its new landfill at Laytonsville last month, praised county officials yesterday for correcting the problems.

After a meeting with County Executive Charles W. Gilchrist, William M. Eichbaum, the state's assistant secretary for environmental programs, issued a statement saying the county's reply to the earlier criticisms had been "prompt, professional and most protective of the environment and the public interest."

"Those items which were outstanding have now been resolved," Eichbaum wrote after the session, which was also attended by John Menke, county director of environmental services, and John R. Griffin, an assistant to Gov. Harry R. Hughes.

On April 25, the state cited the county for "numerous violations" at the $40 million, 550-acre landfill, ranging from excessive water leakage to insufficient dirt on top of the garbage. The state authorities said the problems were "indicative of incompetent management" and they gave Montgomery officials five days to clean up their landfill.

At the time, Menke, who was just taking control of the Environmental Services Department, fired back that the state's strong language was unnecessary. Menke also said the violations cited were "technical" and in no way a danger to the public.