Council chiefs are hoping last-ditch talks could avert a second one-day strike by local authority staff in Birmingham.
About 20,000 council workers have been ordered to strike tomorrow in an ongoing campaign of action against the single status pay and grading review.
An estimated 9,000 people took part in the first one-day strike earlier this month, according to the council, forcing more than 130 schools to shut and severely disrupting refuse collections and other services.
Councillor Alan Rudge, the council's cabinet member for equalities and human resources, said he hoped to build on "constructive" talks held with union chiefs at the end of last week to avert tomorrow's walk-out.
A good working relationship had been developed between the council and the majority of union officials, Coun Rudge (Con Sutton Vesey) said.
However, his hopes of an end to the action could still be dashed by some union officials who he described as "irresponsible" and said were were attempting to destabilise the talks.
He said: "I have spent many hours talking to union leaders and we had a very constructive meeting on Friday which lasted for five hours.
"The result of that was that we have developed a good method for dealing with the issues without having to have industrial action.
"However, everything has to be agreed by higher bodies than the union members I am talking to. I think that, because of the good talks we had on Friday, we can agree something by midday on Monday.
"This would, of course, depend on whether external forces come into play. There are irresponsible union members who tell the press all sorts of things which are not true. Certainly there is every possibility that these constructive talks can be destabilised by these people."
Meanwhile Labour members on the council will wait until tonight to decide whether to break picket lines to attend a crucial meeting.
The 41-strong opposition group is to meet to take a decision on whether to attend tomorrow's full council which will set the city's budget for next year.
Deputy leader Ian Ward (Shard End) said: "It is in everyone's interest that we should be at that meeting. We have met with the unions and we will decide at a party meeting whether we should attend."
Coun Ward declined to give details of what advice was given from the unions.