1. (a) The purpose of this subchapter is to establish minimum requirements that define the acceptable management of water treatment sludge. These requirements apply as specified in §312.2 of this title (relating to Applicability).
2. (b) Except as provided in subsection (c) of this section, the regulations contained in 40 CFR, Part 257 (including all appendices to Part 257), are adopted by reference as amended and adopted in the CFR through October 9, 1993. The definitions contained in 40 CFR, Part 257 supersede any definitions for the same terms found in §312.8 of this title (relating to General Definitions).
3. (c) The commission does not adopt the definition of land application unit as specified in 40 CFR, §257.2.
4. (d) The following term, when used in this subchapter, shall have the following meaning, unless the context clearly indicates otherwise. Land application unit is an area where water treatment sludge is applied onto or incorporated into the soil surface for treatment or disposal, where the disposal occurs within five feet of the surface of the land.
5. (e) The criteria and applicable definitions found in 40 CFR, Part 257 apply to disposal of water treatment sludge in a landfill, waste pile, land application unit, or surface impoundment.
6. (f) When water treatment sludge is mixed with sewage sludge or when water treatment sludge is placed on land for disposal along with sewage sludge, it is subject to all applicable requirements of sewage sludge, as specified in this chapter.

Source Note:The provisions of this §312.121 adopted to be effective October 13, 1995, 20 TexReg 7840.