D.C. security guards are worried about potential new competition--D.C. police officers.

City Council member Nadine P. Winter (D-Ward 6), joined at a press conference yesterday by representatives of several area security firms and about 30 uniformed security guards, called for defeat of a measure that would allow city police officers to hold part-time security jobs. Final reading on the bill is scheduled Tuesday.

Winter said the bill, given preliminary council approval last week, would allow police officers--many of whom live outside the city--to take security jobs from Washington residents. She said the officers would even be able to set up their own security firms.

Michael Revel, a former police officer who now runs a security firm with his father, agreed with Winter. He said the bill "will have a devastating effect on District of Columbia residents who work as part-time security guards. The police would take control of the private security industry."

But police officer Gary Hankins, chairman of the labor committee of the Fraternal Order of Police, which has made passage of the bill its top legislative priority, contended yesterday that "the demand for security is higher than the available people."