Lichen sclerosus and lichen planus are fairly common, non cancerous skin conditions. They can affect different parts of the body, but commonly affect the vulva. When they affect the skin of the vulva, theyâre known as vulval LS or LP.
A gap-graded soil is a soil that has an excess or deficiency of certain particle sizes or a soil that has at least one particle size missing. An example of a gap-graded soil is one in which sand of the No. 10 and No. 40 sizes are missing, and all the other sizes are present.
A rammer is the best choice, or for bigger jobs, a pad-foot roller (similar to a sheepsfoot roller). Lifts for compaction of cohesive soils should be no thicker than 6 inches. Granular soils only need the particles to be vibrated to move them closer together. Vibrating plates or rollers are the best choice. Lifts for gravel can be as thick as 12 inches; 10 inches for sand.