This is the second bid on the vacant 12-acre property the council has turned down, the first being a plan for an advanced manufacturing school a year ago. Xenolith Partners LLC of Bedford, N.Y., and SanoRubin Construction Services LLC of Albany, N.Y., had offered $10,000, well below the assessed value of $2,333,350, and requested a 30-year tax incentive that set the tax bill on each unit and capped increases to 2 percent annually. It was the only bid on the property, which has been put out for requests for proposals nine times now. Approval would have given Mayor Thomas Bernard authority to negotiate terms with the developers.