DWQ-2024-007420

Table 2A – Tailings LinesRelease Response
Copperton Concentrator Groundwater Discharge Permit UGW350017
Estimated Release Volume (solid and liquid combined)
Permitted Release
Reporting Requirements
Additional Reporting Requirements
ResponseActions
Up to 500 gal of tailings slurry2
Yes
A count of these releases will be reported in the quarterly report, no additional details are required.
None
Recover any standing liquids using pumps or vac truck. Excavate and dispose solid tailings deposits in accordance with Appendix A.
500-1,500 gal of tailings slurry
Yes
Submit as part of quarterly report in table formatto include: date, location, description, sample results, cause, and estimated volume.
None
Recover any standing liquids using pumps or vac truck. Excavate and dispose solid tailings deposits in accordance with Appendix A.
1,500-12,000 gal of tailings slurry
Yes
Releases caused by “bubbles and burps”: Submit as part of quarterly report. Include detailed description of the event, sample results, and cleanup activities performed.
For 3 releases over 1,500 gal each within any calendar month or 4 releases over 1,500 gal during the same quarter, DWQ must be notified within 24-hrs and a written report submitted within
5 businessdays.
Follow sampling and cleanup procedures as described in Appendix A.
Yes
Releases other than “bubbles and burps”: Submit as part of quarterly report. Include detailed description of the event, root cause analysis3, sample results, and cleanup activities
performed.
Follow sampling and cleanup procedures as described in Appendix A.
>12,000 gal of tailings slurry3
No
Report to 24-hr DEQ spill line, submit 5 business day letter, root cause analysis4 and 45-day report as per Appendix A requirements.
None
Follow sampling and cleanup procedures as described in Appendix A.