The cleanup of glue spreaders at plywood mills produces a waste that is high in pollutional strength, though quite low in volume. The plywood industry uses three basic types of glue: the blood-soya, or protein variety, for interior grade plywood; the phenolic formaldehyde variety used primarily for exterior grade plywood; and a urea formaldehyde glue used for hardwood paneling. The study was carried out to determine the magnitude and extent of the problem created by the disposal of glue wastes, review the characteristics of plywood glue wastes, and recommend methods of treatment for these wastes. The study area includes the States of Oregon, Washington, Montana, Idaho, and California.