The following were among actions taken at Tuesday's meeting of the Prince George's County Council. For more information, call 952-5182.

HIRING FREEZE -- County Executive Parris Glendening told council members that a freeze on the hiring of additional county employees and police is required to help offset a projected revenue shortfall of $36.5 million for fiscal 1991.

Glendening said a hiring freeze was in effect for all county agencies except the school system, and that no more officers would be added to the 1,203-member force after the current 45-member police training class graduates.

The move is intended to ease the strain on the county's nearly $1 billion current operating budget. Glendening added that he expects the cost-cutting measures to be in effect for up to 18 months, in line with the economic slowdown in the region.

911 SYSTEM -- At the request of the county executive, a bill was introduced that would raise the monthly fee for access to the county's 911 emergency telephone system from 30 cents to 50 cents.

Currently, county residents are charged 30 cents a month on their telephone bills to pay for the 911 service. Now, the entire 30-cent fee is given to the county, but under a recently passed state law, the state will begin withholding 10 cents of the fee for a fund that will help ensure that all counties in the state have and maintain an up-to-date 911 system.

If approved, the 20-cent-a-month increase would become effective Jan. 1. Council members plan to hold a public hearing and possibly vote on the increase Oct. 2.

GLENN DALE HOSPITAL -- Council members, in a 5-to-2 vote, gave preliminary approval to legislation that would authorize the Maryland-National Capital Park and Planning Commission to purchase Glenn Dale Hospital from the District for $3.95 million. The county plans to maintain the 209-acre site at the intersection of Annapolis Road and Glenn Dale Road as open space.

Council members Sue Mills and Floyd Wilson voted against the measure as too costly. The council expects to hold a public hearing within two weeks on whether to purchase the site.