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 18-9 - Groundwater Monitoring and Corrective Action

Universal Citation: WY Code of Rules 18-9

Current through December 21, 2024

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

(a) Applicability: The criteria of 40 CFR 257.90 are incorporated by reference with the exception of 40 CFR 257.90(g) and the following additions:

(i) The operator shall include the following additional information in its annual groundwater monitoring and corrective action report:
(A) A summary of facility operations and activities carried out during the last year including a revised schedule or timetable of facility operations and activities;

(B) A summary of anticipated permit amendments during the next year;

(C) The remaining usable CCR landfill and CCR surface impoundment capacity (in total cubic yards) excluding final cover;

(D) Quantity of waste managed during the last year and the method used to determine the amount;

(E) Quantity of CCR waste removed, recovered, or diverted for beneficial use and the method used to determine the amount;

(F) Electronic copies of all required monitoring data not already submitted following a sampling event, in a format specified by the Administrator. The Administrator may require paper copies of monitoring data, as well as supporting charts or maps that represent the data; and

(G) The Administrator may require reporting of additional information needed to demonstrate compliance with these rules.

(b) Groundwater monitoring systems: The criteria of 40 CFR 257.91 are incorporated by reference with the following additions:

(i) A description of the groundwater monitoring well location, design, construction, and development; and

(ii) A description of the groundwater sampling program including sampling frequency, test parameters, sampling procedures, test methods and quality control.

(c) Groundwater sampling and analysis requirements: The criteria of 40 CFR 257.93 are incorporated by reference with the following additions:

(i) If the operator is disposing of non-CCR industrial waste, the detection monitoring program may also include constituents identified in Chapter 3, Appendix A of these rules, as required by the Administrator;

(ii) If the operator is disposing of non-CCR industrial waste, the assessment monitoring program may include constituents identified in Chapter 3, Appendix B of these rules, as required by the Administrator; and

(iii) Constituents identified in Water Quality Rules, Chapter 8, Table 1 may be included as required by the Administrator for groundwater classification.

(d) Detection monitoring program: The criteria of 40 CFR 257.94 are incorporated by reference.

(e) Assessment monitoring program: The criteria of 40 CFR 257.95 are incorporated by reference with the exception of 40 CFR 257.95(h)(2) and the following additions:

(i) The owner or operator must request in writing that the Administrator establish a groundwater protection standard for any constituent required by the Administrator under (c)(i) or (ii) of this subsection that is not listed in 40 CFR part 257 , Appendix III or IV. The Administrator shall establish groundwater protection standards for such constituents, which shall be:
(A) For constituents where a maximum contaminant level (MCL) has been promulgated, the MCL for that constituent;

(B) For constituents for which MCLs have not been promulgated, the background concentration; or

(C) For constituents for which the background level is higher than the MCL or any health-based level established under subsection (e)(ii), the background concentration.

(ii) The Administrator may establish an alternative groundwater protection standard for constituents for which MCLs have not been established. These groundwater protection standards shall be health-based levels. For constituents where a MCL does not exist, the alternative groundwater protection standard shall be the more stringent standard meeting the requirements of Water Quality Rules, Chapter 8, Table 1 based on groundwater class of use or the Drinking Water Equivalent Level as determined by the procedures found in the Storage Tank Rules Chapter 1, Section 39(e).

(f) Assessment of corrective measures: The criteria of 40 CFR 257.96 are incorporated by reference.

(g) Selection of remedy: The criteria of 40 CFR 257.97 are incorporated by reference.

(h) Implementation of the corrective action program: The criteria of 40 CFR 257.98 are incorporated by reference.

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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