The District of Columbia government is negotiating an arrangement to move more than 300 of its employes into offices in the old Lansburgh's department store, the D.C. General Services Department reported yesterday.

Carrroll B. Harvey, acting director of the deprtment, said the employes would be moved there from the Munsey Building 1329 E St. NW, which is scheduled for demolition soon as part of the Pennsylvania Avenue redevelopment program.

The National Archives, which had used the upper stories of the defunct store as a warehouse for valuable documents, recently decided to vacate the building because of potential hazards.

Harvey said the building was inspected recently by the D.C. fire marshall who, he said found the lower stories suitable for office use if some relatively minor shortcomings are corrected. "We're not going to move into any building that is unsafe," Harvey said.

The building, which is south of E Street between Seventh and Eighth Streets NW, is owned by the Pennsylvania Avenue Development Corporation, the government-sponsored agency that is redeveloping the site of the Munsey Building.

Harvey described the chances of city occupancy of the Lansburgh's building as "fifty-fifty" and said the proposed arrangement calls for the city to occupy it free of rent. The city would pay for cleaning and paainting the building's interior, installing partitions and heating and utility costs.

The Munsey Building, located next door to the National Theater, has served as a sort of annex to the District Building-- Washington's city hall-- which is directly across Pennsylvania Avenue. The largest agency currently located in Munsey is the Rental Accomodations Office, which administers rent controls.