Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 330 - MUNICIPAL SOLID WASTE › Subchapter N - LANDFILL MINING › Section 330.609 - Operational Requirements and Design Criteria

Current through Reg. 49, No. 28; July 12, 2024
The operation of the facility shall comply with all of the
					 following operational requirements.
(1) Protection of groundwater. The owner or
				  operator shall install and maintain a liner system constructed in accordance
				  with one of the provisions of subparagraphs (A) or (B) of this paragraph. The
				  liner system shall be provided where receiving, processing, post-processing,
				  screening, and storage areas would be in contact with the ground or in areas
				  where leachate, contaminated materials, contaminated products, or contaminated
				  water is stored or retained. The application shall demonstrate that the
				  facility is designed so as not to contaminate the groundwater and so as to
				  protect the existing groundwater quality from degradation. The owner or
				  operator shall submit a liner quality control plan as specified in §
										330.339
				  of this title (relating to Liner Quality Control Plan). For the purposes of
				  this paragraph, protection of the groundwater includes the protection of
				  perched water or shallow surface infiltration. The liner shall be covered with
				  a material designed to withstand normal traffic from the processing operations.
				  The owner or operator of the facility shall demonstrate that any liner system
				  constructed will not undergo uplift from hydrostatic forces during its
				  construction or operational life and that any existing liner system will not
				  undergo uplift from hydrostatic forces during mining operations. Acceptable
				  demonstration methods are listed within §330.337(b)(1) - (4) of this title
				  (relating to Special Liner Design Constraints):
(A) a composite liner consisting of two
				  components. The upper component must consist of a minimum 30 mil geomembrane
				  and the lower component must consist of at least a two-foot layer of compacted
				  soil with a hydraulic conductivity of no more than 1 x
				  10-7 centimeters/second. Geomembrane components
				  consisting of high density polyethylene shall be at least 60 mil thick. The
				  geomembrane shall be installed in direct and uniform contact with the soil
				  component;
(B) an alternative
				  design approved by the executive director that is protective of groundwater.
				  When approving a design that complies with this subsection, the executive
				  director shall consider at least the following factors:
(i) the hydrogeologic factors of the
				  area;
(ii) the climatic factors of
				  the area; and
(iii) the volume and
				  physical and chemical characteristics of the waste and leachate;
(C) a demonstration that any liner
				  system constructed will not undergo uplift from hydrostatic forces during its
				  construction or operational life and that any existing liner system will not
				  undergo uplift from hydrostatic forces during mining operations. Acceptable
				  demonstration methods are listed within §330.337(b)(1) - (4) of this
				  title;
(D) submission of liner
				  construction certifications as required by §
											330.341
				  of this title (relating to Soil Liner Evaluation Report and Geomembrane Liner
				  Evaluation Report).