The union striking Giant Food Inc. is Local 730 of the Teamsters warehouse union, not Local 400 as reported in yesterday's Business & Finance section.

Negotiations between Giant Food Inc. and striking members of Local 400 of the Teamsters warehouse union have yielded a second tentative agreement, and union members will vote on it at 1 p.m. today at the Sheraton Inn in Lanham, a spokesman for the Federal Mediation and Concilliation Service said yesterday.

A two-year contract between the union and the company expired last Saturday. Although the two parties reached agreement on a new contract, the pact was turned down by Local 400 membership on Saturday, and the strike began the next day.

Giant Food officials, union leaders and representatives of the Federal Mediation and Concilliation Service met through the late afternoon yesterday. Giant officials would not characterize the talks, a phone call to the union leadership was not returned and the mediator would not disclose terms of the tentative agreement.

Earlier yesterday, a company spokesman insisted the strike would not affect store operations.

"We can continue as long as we have to," said Barry Sheer, a company publicist. "The stores are fully stocked." Sheer pointed out that company management officials were handling the warehouse duties of about 500 union members at two Giant facilities in Landover and Jessup.

The warehouses serve all 123 of Giant's stores. Giant is the largest supermarket chain in the Washington metropolitan area.