R.I. Gen. Laws § 37-7-14: Topsoil conservation.

Any alteration on state owned land, or any alteration funded by the state which requires the alteration of topsoil shall require the use of “compost amended soil” which meets the United States Department of Agriculture classification criteria of silt loam, sandy loam, loamy sand, or loam with a minimum of at least two percent (2%) organic matter.