Oneida County’s largest employee union has narrowly ratified — 53 to 47 percent — a three-year tentative agreement.

Voting ended Monday and the outcome was 254 in favor and 221 opposed, said Gary Hickey of the United Public Service Employees Union. Hickey declined to discuss details of the proposal until after it has been presented to the Board of Legislators.

The White Collar Unit represents some 700 county office workers.

County Executive Anthony J. Picente plans to review the proposed settlement with the legislators Thursday afternoon in executive session. Terms will be publicly released after this session.

Yesterday’s vote is one of several labor-related matters occurring at the county.

Hickey’s UPSEU also is getting ready for a vote Monday and Tuesday of next week by the county’s Blue Collar Unit, whose approximate 250 members work in the Department of Public Works and Water Pollution Control, and at Mohawk Valley Community College. Voting on that three-year offer will be on-site.

The county and UPSEU reached tentative terms for the White and Blue Collar units in April. Labor contracts are subject to final approval by the Board of Legislators.

The units have been operating under an expired contract since Jan. 1, 2011. The new agreements, which are similar, would be retroactive to last year and run through the end of 2013.

Although there’s no agreement in place, the unionized employees still received automatic step increases based on seniority for last year and this year.

Separately, the county was scheduled to meet today with the Oneida County Police Benevolent Association, which represents road patrol deputies and 911 telecommunications dispatchers.

Also working without a contract are members of Oneida County Sheriff’s Department Employees Local 1249, which covers mostly corrections officers and some civilian positions at the county jail, as well civil deputies, court security personnel and court attendants.

Like with the UPSEU, the agreements with the PBA and Local 1249 expired Dec. 31, 2010. The settlements with the White and Blue Collar units could serve as models for negotiations with the PBA and Local 1249.

Picente had requested a wage freeze, including step movement, from all unionized employees in 2011, but was turned down by the bargaining units. Picente had said if the unions took the pay freeze, there would be no layoffs. However, when the freeze request was rejected, Picente used about 70 layoffs to help balance the 2011 budget.