(a) In the application, the owner or operator shall submit documentation demonstrating compliance with applicable design criteria in Subchapter F of this chapter (relating to Design Criteria).
(b) For new or laterally expanding coal combustion residuals landfills and surface impoundments, the owner or operator shall submit subsurface soil information. A sufficient number of borings shall be performed to establish the subsurface stratigraphy and determine geotechnical properties beneath the unit. The borings must be to a sufficient depth to identify the uppermost aquifer and any underlying hydraulically interconnected aquifers. All borings shall be conducted in accordance with established field exploration methods. The subsurface soil information must be prepared and certified in accordance with §352.4 of this title (relating to Engineering and Geoscientific Information) and shall be included with the application. The subsurface soil information must include:
  (1) a description of all borings drilled at the unit location, to test soils and characterize groundwater;
  (2) a unit map drawn to scale showing the surveyed locations and elevations of the borings;
  (3) cross-sections prepared from the borings depicting the generalized strata at the unit;
  (4) boring logs including a description of materials encountered, including any discontinuities such as fractures, fissures, slickensides, lenses, or seams;
  (5) a description of the geotechnical data and the geotechnical properties of the subsurface soil materials, including the suitability of the soils and strata for the intended uses; and
  (6) a demonstration that all geotechnical tests were performed in accordance with industry practice and recognized procedures.

Source Note: The provisions of this §352.261 adopted to be effective May 28, 2020, 45 TexReg 3464