Los Angeles and Long Beach truck drivers alleging a Rancho Dominguez trucking firm has committed more than 50 labor violations are scheduled to have their claims heard in August by a National Labor Relations Board judge. The drivers, represented by the International Brotherhood of Teamsters, have accused Green Fleet Systems of harassing union supporters and other violations. An attorney for Green Fleet responds that the union itself has committed unlawful picketing activities and that most of Green Fleet drivers are independent contractors who are not entitled to unionize, the Long Beach Press-Telegram reports.