On a case-by-case basis, the commission or executive director may impose requirements for the use or disposal of sewage sludge, biosolids, domestic septage or water treatment residuals in addition to or more stringent than the requirements in this chapter when necessary to protect human health or the environment from any adverse effect from sewage sludge, biosolids, domestic septage or water treatment residuals.
30 Tex. Admin. Code § 312.6