Six Southern California grocery workers' unions have reached a tentative contract agreement with Stater Bros. markets, the United Food and Commercial Workers union announced.

Details of the agreement will be released after members vote to accept or reject the agreement, with voting scheduled to end on Jan. 17. The United Food and Commercial Workers union represents more than 70,000 Southern California grocery workers working in nearly 3,000 stores.

The tentative pact marks the first time a grocery workers' agreement has been reached since the close of the 2003-2004 grocery worker strike, which lasted 141 days. The unions hope the agreement will set a precedent for future negotiations with other chains.

The Colton-based company is the third largest super market chain in Southern California, employing more than 16,000 workers.

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