| On 08/27/2025, the potential presence of impacted material(s) was identified via hydrocarbon odor and hydrocarbon staining during confirmation soil sampling activities at the Guttersen State CC20-13, wellhead, sample: WH01, located at the former wellhead. The volume of potentially impacted material(s) is not currently known. Out of an abundance of caution, the operator is submitting notification within 24 hours of the discovery of the potential presence of impacted material(s) soil. Initial soil sampling is underway to determine whether any constituents are present at levels in excess of Table 915-1 standards. Groundwater was not encountered during confirmation sampling activities. This location is within the Pronghorn Winter Concentration High Priority Habitat. Final analytical results from initial soil sampling will be included on a Supplemental Form 19. All data collected will be submitted with the next quarterly Supplemental Form 27 for REM 28740, due by 10/13/2025. |