BAILEYVIEW, Maine — Five picketers at a Washington County pulp producer were arrested Monday, according to a union official who denied accusations that strikers were blocking a gate. Just last week, members of several unions representing the workers rejected Woodland Pulp’s latest contract offer, extending the dispute that began in mid-October. The union representing workers at the Baileyville plant said between 30 and 40 were picketing outside the mill at the time. …Employees have been on strike since about 90 union members walked off the job Oct. 14. The company employs more than 300 workers. …Brendan Wolf said Woodland Pulp has hired temporary replacement workers. …The mill is owned by St. Croix Tissue, based in Canada. Its parent company, the International Grand Investment Corp., is a U.S.-based company held by a Chinese investment firm.