Wyoming Administrative Code
Agency 020 - Environmental Quality, Dept. of
Sub-Agency 0009 - Solid Waste Management
Chapter 18 - DISPOSAL OF COAL COMBUSTION RESIDUALS IN LANDFILLS AND SURFACE IMPOUNDMENTS
Section 18-7 - Design Criteria

Universal Citation: WY Code of Rules 18-7

Current through September 21, 2024

All facilities shall demonstrate compliance with the following applicable standards and criteria in the permit application:

(a) Design criteria for new CCR landfills and any lateral expansion of a CCR landfill: The criteria of 40 CFR 257.70 are incorporated by reference.

(b) Liner design criteria for existing CCR surface impoundments: The criteria of 40 CFR 257.71 are incorporated by reference.

(c) Liner design criteria for new CCR surface impoundments and any lateral expansion of a CCR surface impoundment: The criteria of 40 CFR 257.72 are incorporated by reference.

(d) Structural integrity criteria for existing CCR surface impoundments: The criteria of 40 CFR 257.73 are incorporated by reference, with the exception of the phrase "not to exceed a height of six inches above the slope of the dike" in 40 CFR 257.73(a)(4) and (d)(1)(iv).

(e) Structural integrity criteria for new CCR surface impoundments and any lateral expansion of a CCR surface impoundment: The criteria of 40 CFR 257.74 are incorporated by reference, with the exception of the phrase "not to exceed a height of six inches above the slope of the dike" in 40 CFR 257.74(a)(4) and (d)(1)(iv).

(f) Design criteria: A detailed description of the facility design and construction standards including:

(i) Surveyed corners: All facility boundary corners shall be surveyed and marked with permanent survey caps.

(ii) Buffer zones: All facilities shall be designed and constructed with a buffer zone that is a minimum of twenty feet wide within the facility perimeter fence.

(iii) Cover material availability: An evaluation of the availability of cover material sufficient to properly operate the facility through the closure period.

(iv) Slope stability for excavations: Trench walls shall not exceed a ratio of 1.5:1 (horizontal:vertical) unless a slope stability analysis demonstrates steeper slopes can be safely constructed and maintained. This analysis may be based on site-specific soil stability calculations or Wyoming Occupational Safety and Health Administration regulations for excavations.

(v) Quality assurance/quality control: Facilities shall submit construction quality assurance/quality control plans that ensure adequate construction and testing of the containment system components.

Disclaimer: These regulations may not be the most recent version. Wyoming may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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