| On 07/08/2025, the potential presence of impacted material(s) was identified via hydrocarbon odor, and hydrocarbon staining during decommissioning activities at the New Cache FH SESE PAD 8-40D, tank battery, samples: PWV01-S, PWV02-S, discovered at the produced water vessel. These two samples are in the same area and depth and are considered one release. 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 decommissioning activities. This location is within the Mule Deer Severe Winter Range and is within 300 feet of waters of the state. Final analytical results from initial soil sampling will be included on a Supplemental Form 19. |