30 C.F.R. § 816.200
The following interpretations of rules promulgated in part 816 of this chapter have been adopted by the Office of Surface Mining Reclamation and Enforcement.
(1) Results of physical and chemical analyses of overburden and topsoil to demonstrate that the resulting soil medium is equal to or more suitable for sustaining revegetation than the available topsoil, provided that trials, and tests are certified by an approved laboratory in accordance with 30 CFR 816.22(e)(1)(ii), may be obtained from any one or a combination of the following sources:
(2) If the operator demonstrates through soil survey or other data that the topsoil and unconsolidated material are insufficient and substitute materials will be used, only the substitute materials must be analyzed in accordance with 30 CFR 816.22(e)(1)(i).
(Secs. 501, 502, 504, 508, 515, 516, Pub. L. 95-87, 91 Stat. 467, 468, 471, 478, 492, 496 (30 U.S.C. 1251, 1252, 1254, 1258, 1265, 1266))
[45 FR 26000, Apr. 16, 1980 and 45 FR 39447, June 10, 1980, as amended at 45 FR 73946, Nov. 7, 1980]