Barbara Collins, a fired associate who worked at Wal-Mart in Placerville, Calif., said she was glad to hear that the board was pursuing the complaints of hers and others.
"We have the support of thousands of Americans standing with us for better jobs at Wal-Mart,'' she said.
The NLRB statement Monday said Griffin found no merit to other charges against Wal-Mart. He found the company did not interfere with workers' rights to strike by telling protesters in Texas and Illinois to move off store property. And he found that store officials in California and Washington did not unlawfully change work schedules or otherwise retaliate against workers who exercised their legal right to discuss wages and working conditions.
The United Food and Commercial Workers union has tried for years to organize workers at Wal-Mart, the nation's largest private employer, with about 1.3 million employees. The company has vigorously opposed unionizing efforts.
Last year, Wal-Mart filed charges with the NLRB claiming that the UFCW was illegally picketing its stores for the purpose of unionizing workers. Wal-Mart claimed that under the law, the UFCW could not picket for more than 30 days without filing formal papers to form a union.
Wal-Mart and the union ultimately settled the charges, with the UFCW saying it wasn't seeking to form a union and agreeing not to picket the company for 60 days. But the union vowed to continue to press Wal-Mart to improve overall working conditions, including wages.
More than 50 Wal-Mart workers and other protesters were arrested in Los Angeles earlier this month protesting a newly opened Wal-Mart store in Chinatown. Wal-Mart officials say the company pays competitive wages and gives workers opportunities for career growth and economic security.Follow Sam Hananel on Twitter: http://twitter.com/SamHananelAP