Fourteen Toronto councillors have signed a petition demanding complete details on the city's $220-million deal to acquire a landfill near London.

The politicians say they were only shown a partial report in September and they have many unanswered questions about the agreement negotiated by city staff.

The councillors are demanding a detailed briefing before next month's council meeting.

"We're not mushrooms you know. We can't be kept in the dark," Councillor Doug Holyday, who signed the petition, told the Toronto Star.

"We need a presentation organized by staff, and I think the mayor should be available to answer questions."

Councillors were first told of the plan to buy the Green Lane site, near London, at a special closed-door meeting in September. Council later voted to give staff the power to negotiate the purchase.

Councillors were shown details last year, but some say they have forgotten the details because they have not been kept up-to-date on the matter.

"As we are all committed to accountability and transparency, we are requesting that city staff provide a detailed briefing to city councillors, outlining the status of the contract and any outstanding issues," says the petition, drafted by Councillor Karen Stintz.

The petition's signatures represent Mayor David Miller's conservative critics, who point out he promised in September to make all information about the deal public in 90 days, the Star reports.

"Sufficient time has gone by, certainly more than 90 days, and there should be some more information available. It's time we sat down and council was brought up to speed on this," Holyday said.

"It seems to me we're having fewer and fewer council meetings. I guess that means more and more of the business of the city is being done through the mayor's office, or through the mayor and the executive committee."

Miller said he hasn't spoken to the signatories, but said he has no problems with another briefing.

Several councillors have complained about the lack of disclosure on Green Lane, and they are concerned about the costs and the court challenge by the Oneida Nations of the Thames.

Toronto has been forced to find a new home for its garbage after the province reached an agreement with Michigan to close the border to Ontario's garbage in 2010.