The operator of a private trash company and a D.C. government employe pleaded guilty here yesterday to bribery and conflict of interest charges in connection with illegal sales of motor oil owned by the District government.

Edmond M. Johnson, 70, the owner of Kenilworth Trash Co. in Northeast Washington, pleaded guilty to bribery of a government official.

Carlton Ford, 37, a supervisor at the Department of Public Works maintenance warehouse at 1725 Fenwick St. NE, pleaded guilty to conflict of interest charges.

Assistant U.S. Attorney Robert E. McDaniel said Ford had received $205 from Johnson in July for about $700 worth of motor oil that was delivered from the city warehouse to Johnson's company office at 4214 Hunt Place NE. McDaniel said the cash was transferred through employes of both men. No employe has been charged.

As part of a plea agreement announced in U.S. District Court, McDaniel said the government would dismiss unrelated charges against Johnson and his office manager, Barbara C. Pugh, of forging a document and submitting it to obtain a government contract.

The alleged forgery was in connection with a contract last spring to remove trash and infectious waste from Andrews Air Force Base.

Ford, of 6917 Randolph St., Landover, has been a District employe since 1971. He and Johnson, who lives at 6808 Piney Branch Rd. NW, were both arrested Sept. 18.

Ford faces a maximum penalty of two years in prison and a $250,000 fine. Johnson faces a maximum penalty of 15 years in prison and a $250,000 fine.

Both men were released yesterday without bond.

U.S. District Judge John Garrett Penn, who accepted Ford's plea, indicated he would be sentenced in about a month. U.S. District Judge John H. Pratt set no date for sentencing Johnson.