Sand
Sand shading is a term used to indicate a process where sand, often imported, is poured over the top of a pipe several inches, per specifications, in an area called the "pipe zone."
1639 E. Miraloma Avenue Placentia, CA 92870

Sand shading is a term used to indicate a process where sand, often imported, is poured over the top of a pipe several inches, per specifications, in an area called the "pipe zone."