Provide staples that are made of 12-inch lengths of No. 25 plain iron wire. 807.03 Construction 807.03.01 Installing Topsoil Stabilization Matting Before placing erosion control mats, ensure that topsoil is smooth, friable, and free of depressions, clods, mounds, stones, or other debris that may prevent the matting from making complete contact with the topsoil.