A second wave of environmental investments started in 1986. A treatment plant for the bark water was completed in 1986 and a central cleaning plant for debarking of the lumber the following year. In 1988 the sedimentary pool was rebuilt and a treatment plant for the smoke from the bark burning was completed. Bleaching with chlorine was replaced with hydrogen peroxide and sodium dithionite in 1989. This was largely done during a period when most customers demanded the removal of chlorine in products. This demand has since recessed. These investments cost a combined NOK 40 million.