A permanent wash pad is ideal for heavy washing of fleet vehicles. Permanent pads offer superior ability to capture and treat wash water prior to discharge and minimize the effort needed to cleanup of solids. A permanent pad offers the highest level of protection against an illegal discharge of wash water. Proper design of a wash pad and associated treatment equipment results in optimal performance and efficient use of employee time. Weir and trench design allows for solids to settle out before they enter a filtration system, increasing the performance and life of treatment equipment. Mud and other solids are allowed to settle on a concrete pad where they can easily be removed. US Hydro Tech Environmental Solutions is experienced in custom designing permanent wash pads to meet the needs of a variety of industries and needs.