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COGIS - SPILL OR RELEASE INFORMATION

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Alter C#9-23 - #490719 InformationStatus: CL - 6/2/2025
Spill Type: ReleaseFacility Name/No.:Alter C#9-23 /
Facility Type:SPILL OR RELEASEFacility Status:CL
Date of Discovery:5/30/2025Date Closed:6/2/2025
Operator:NOBLE ENERGY INC Operator Number:100322
County:WELD  - #123Location:CSE 9 4N64W
Doc Number:404224730Lat/Long:40.323471 / -104.550825  Source: ACTUAL based On LatLong
Municipality
(if within municipal boundaries):
--
Waters of the State: Impacted Media:
Related Remediation Project Number
if work proceeding under an approved Form 27:
N/A
 
Spill Description:
On 5/30/2025, the potential presence of impacted material(s) was identified via hydrocarbon staining during resampling activities at the Alter C #9-23, wellhead, samples: WH01 & WH01-S. This facility had been previously cut and capped, and the flowline was abandoned-in-place (ABIP). The base and sidewall samples are in the same wellhead excavation. 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 resampling activities. All data collected will be submitted with the next quarterly Supplemental Form 27 for REM 32279, due by 6/23/2025.
 
Resolution:
Resolving Document:  404224730Closure Requested:  06/02/2025
Resolution:  Work Procedeing under Form 27
 
Operator Information:
Operator:NOBLE ENERGY INC
Oper. No.100322
Address:1099 18TH STREET SUITE 1500  DENVER  CO 80202
Type of Facility:SPILL OR RELEASE
Fac. Name:Alter C#9-23 -
County Name:WELD
qtrqtr: CSEsection: 9township: 4Nrange: 64Wmeridian: 6