Just days away from the July 1 budget deadline, Oakland Mayor Jean Quan and the City Council brokered tentative agreements Monday with the Oakland police union and four other public employee guilds that could help fill a crippling $58 million deficit looming over the city.

The most significant concession would come from the Oakland Police Officer's Association, which agreed to pay 9 percent of its pension plan, a compromise pushed by the City Council that the union rejected last year.

The Oakland firefighters union would also pay 9 percent, as would the three other unions -- the Professional & Technical Engineers Local 21, the International Brotherhood of Electrical Workers Local 1245 and SEIU Local 1021.

The union's rank-and-file membership still has to approve the deals, but city officials said they are hopeful.

The tentative agreements are the result of weeks of negotiations with the unions, at-large Councilwoman Rebecca Kaplan said.

The concessions are real, she said, without being "devastating."

The City Council will discuss the labor negotiations during a closed-session meeting at 9 a.m. Tuesday, followed by a meeting at 5:30 p.m. in the City Hall chamber.

It's possible that the union members will have voted by then on whether to accept the agreements.

"The savings have to be real and not just on paper," Councilman Ignacio De La Fuente, who represent Glenview-Fruitvale, said.

They also will have to agree to no layoffs to have a chance with police.

Layoffs derailed a similar agreement with the police union last year.

In exchange for contributing to member's pensions, the union wanted a promise that no officers would be laid off. The City Council refused and ended the showdown by cutting 80 officers from the force.

OPOA President Dom Arotzarena could not be reached by press time.

An agreement with the five unions could save the city $40 million a year.

That would help prevent deep cuts that called for eliminating city jobs, put libraries on the chopping block and pulled funding from other city services, such as parks and the arts.