The controlled burning of wood wastes as hog
fuel produces steam which can subsequently be used in drying kilns or for power generation. The conversion of wood products waste materials to useful energy helps the mills to reduce their con• sumption of natural gas and oils. However, the conversion of existing wigwam burners to burning units which will meet current air pollution standards is costly, discouraging the wide use of these
facilities. Other possible alternative methods fordisposing of wood waste include: ( 1) sale of residues for by-product materials, (2) sale of residues for agricultural use, (3) storage for future sales, and
( 4) land disposal. Obviously, the first alternative has both economic and environmental advantages. The other three alternatives have the potential for generating leachate and the latter two also pose a potential fire danger, especially during the dry season. Land disposal of wastes, especially bark, contaminated residues, broken pallets, clean-up debris, dunnage, etc., has become a very common practice in Oregon