The estimated cost for a replacement city fire headquarters is increasing almost 30 percent to deal with extensive soil contamination at the roughly 4-acre project site, a finding that took local officials by unpleasant surprise. The City Council on Tuesday night introduced a $5 million bond ordinance, with a final vote scheduled for February. The money raised would be added to a $17 million bond ordinance finalized in December 2021. The city is raising all funding through bond ordinances. The added cost was broached with council at its Jan. 17 work session. City Solicitor Richard Tonetta said then the city was not at fault for the late discovery of contamination. The 200 North West Boulevard site had been pronounced contamination free from environmental problems after two inspections by a licensed site remediation specialist, he said.