For a free online groundwater sampling quote, CLICK HERE or call AGES, Inc. at (412) 264-6453 for more information

Structural Integrity Requirements for CCR Surface Impoundments


 

To prevent structural failures of CCR surface impoundments, the CCR rule established structural integrity criteria for new and existing, non-incised, CCR surface impoundment, as well as lateral expansions of these units. The applicability of these requirements varies depending on dike heights, storage volume, hazard potential and other factors (40 CFR 257.73 and 40 CFR 257.74).

Owners and operators of all new and existing CCR surface impoundments are required to complete the following structural integrity requirements:

  • Marker identification – Place a permanent identification marker on or near the CCR surface impoundment that contains the identification number(s), the name of the CCR unit and the name of the owner or operator. This permanent marker should have been installed within 8 months after the publication date of the rule in the Federal Register (by December 17, 2015).
  • Hazard Potential Assessment – Conduct an initial hazard potential assessment of the CCR surface impoundment to determine the hazard potential classification (low, significant or high). This initial hazard potential assessment must be completed within 18 months after the publication date of the rule in the Federal Register (by October 17, 2016). Periodic hazard potential reassessments of the CCR surface impoundment must be conducted at least every 5 years.
  • Emergency Action Plan – For all surface impoundments assessed as having either a significant or high hazard potential, an Emergency Action Plan (EAP) must be developed that is commensurate with its hazard potential classification. The initial EAP must be completed within 24 months after the publication date of the rule in the Federal Register (by April 17, 2017).
  • Slope Protection – Maintain the CCR surface impoundment with vegetation or other forms of slope protection. 

Owners and operators of CCR surface impoundments that are 1.) twenty feet high or more; OR 2.) five feet high or more AND have twenty acre feet or more of storage volume are required to complete the following structural integrity requirements:

  • Construction History – Document the design and construction of the CCR surface impoundment within 18 months after the publication date of the rule in the Federal Register (by October 17, 2016).
  • Structural Stability Assessment – Conduct an initial structural stability assessment of the CCR surface impoundment to document whether the design, construction, operation and maintenance is consistent with accepted good engineering practices. The initial assessment must be completed within 18 months after the publication date of the rule in the Federal Register (by October 17, 2016). Periodic structural stability reassessments of the CCR surface impoundment must be conducted at least every 5 years.
  • Safety Factor Assessments – conduct and initial safety factor assessment to document safety factors for slope stability. The initial assessment must be completed within 18 months after the publication date of the rule in the Federal Register (by October 17, 2016). Periodic safety factor reassessments of the CCR surface impoundment must be conducted at least every 5 years.

 

Call AGES, Inc. at (412) 264-6453