Congressional hearings begin soon on two key and very basic items of interest to federal workers: How and what they are paid, and extra time off for emergencies.

Hearings on a leave-bank bill are slated for Aug. 4 before Rep. Gary Ackerman's (D-N.Y.) House subcommittee on compensation and employee benefits. It is to consider a proposal by Rep. Frank R. Wolf (R-Va.) to allow federal workers to donate their annual leave time to a special bank. Workers who need that leave because of family or medical emergencies could draw on the bank.

The bill, which has 70 consponsors, will get serious attention. It would set up a five-year experiment to see if the program is workable and whether it costs, or saves, the taxpayers money.

The Office of Personnel Management has set up a tiny leave-sharing experiment, but the leave-bank concept, if approved, could be established in nearly every agency.

In September, the subcommittee is to take up an Ackerman plan -- still being drafted -- to revise the government's pay system for white-collar employes. It is expected to give the government more flexibility to set higher salaries for hard-to-hire specialists, and to provide a mechanism that would keep government salaries --

now said to lag 24 percent behind the private sector -- closer to industry pay rates for the same job.

On Sept. 10, hearings will be held in Sacramento, Calif., on an experimental program -- due to begin early next year -- at McClellan Air Force Base. Under the McClellan experiment, workers would be eligible for annual cash bonuses if their units or offices could cut costs via productivity.

The subcommittee is expected to sit on a revised administration plan to link pay raises for workers to performance as measured by their immediate supervisors.Job Mart

The National Park Service needs a plumber, $10.60 per hour, and an electrician, $11.16 per hour. Call Diane Chabot on 485-9748.

The IRS wants a library technician (law) at the Grade 5 or 6 level. Call 343-0431.

Environmental Protection Agency has an opening in Cincinnati for a GM (merit pay) 14 personnel officer, and a GS 13/14 Seattle vacancy for a human resources officer. Call Esther DeLauder at 382-2997. People

Ted Vallerie has joined the National Association of Postmasters as legislative counsel. He replaces Pamela M. Beer. Vallerie was a top officer with the American Postal Workers Union and an instructor for the Postal Service staff college in Potomac. Attn: Map Freaks

The public inquiries section of the Geological Survey is moving from the General Services Administration building to Interior's South Building. GSA will use the old space for a day care center. Map lovers know that the survey office is one of the best (and least expensive) places to get maps, charts, etc. Until the new office is set up, inquiries will be handled by the survey's Reston office at 648-6892. Bureaucrat Bashing

The National Association of Government Communicators plans to write all presidential candidates urging them to refrain from running against government employes. NAGC points out that no chief executive of a corporation knocks the work force he or she depends on. Defense Mapping Agency's Del Malkie is president of the communicators group.

We'll let you know which of the candidates respond positively. And which don't.