A Washington company has been fined a second time for discharging pentachlorophenol into the South Yamhill River above permitted levels at its Sheridan wood preserving facility.The chemical is toxic to fish and other aquatic organisms. Tacoma-based McFarland Cascade Holdings purchased Sheridan’s Pacific Wood Preserving of Oregon in 2013. McFarland Cascade Holdings is a wholly-owned subsidiary of Stella-Jones Inc., a Canadian company with 37 wood preserving operations in North America and sales of $1.84 billion in 2016. It produces railway ties, utility poles, residential lumber and industrial products. …“We’re looking into the allegations. As always, we hope to resolve it amicably,” VP Human Resources Marcell Driessen said. “McFarland Cascade Holdings takes environmental compliance extremely seriously.”