| Form 27/27A |  Related  Doc |
| Date Submitted: | 2/14/2023 |
| Date Recv'd: | 2/14/2023 | Assigned by: | Alexander Ahmadian |
| DocNum: | 403319680 | Facility ID: | 483772 |
| Document Type: | FORM 27 | Project Number: | 27559 |
| Operator Information: |
| Operator: | KERR MCGEE OIL & GAS ONSHORE LP |
| Oper. No. | 47120 |
| Address: | P O BOX 173779 DENVER CO 80217-3779 |
| Type Of Facility: | SPILL OR RELEASE |
| Fac. Name | Miller 23-24 Wellhead Reclamation |
| County Name: | WELD |
| Operator contact: | Macy Kiel |
| qtrqtr: NESW | section: 24 | township: 3N | range: 66W | meridian: 6 |
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| Remediation Details: |
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| Reason for Report: SPILL |
| Cause of Condition: SPILL OR RELEASE |
| Potential Receptors: Surface water is located approximately 260 feet west of the release location.
A livestock holding p |
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| FURTHER SITE INV: | Impacted soil remains at the site. Excavation and site assessment activities are ongoing and will be summarized in a forthcoming Form 27-Supplemental update. |
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| HOW REMEDIATE: | Laboratory analytical results indicate that soil impacts remain at the site. Excavation and site assessment activities to address remaining soil impacts are ongoing and will be summarized in a forthcoming Form 27-Supplemental update. Estimated time to attain NFA is TBD based on the groundwater concentrations, the extent of impacted soil remaining. |
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| INITIAL ACTION: | On December 16, 2022, historical soil impacts were discovered during reclamation activities at the former Miller 23-24 wellhead location. The COGCC issued Spill/Release Point ID 483772 for this release. On December 8, 2022, three (3) preliminary soil samples were collected from the reclamation area of interest, and submitted for laboratory analysis to determine if impacts were present. Based on field observations and PID readings, the soil sample exhibiting the highest degree of potential impacts (REC-SS01@3") was selected for waste characterization purposes and submitted for laboratory analysis of the full COGCC Table 915-1 analytical suite, using standard COGCC-approved methods appropriate for detecting the target analytes. Laboratory analytical results indicated that soil impacts were present due to polycyclic aromatic hydrocarbons (PAH), arsenic (As), selenium (Se), pH, specific conductivity (EC), and sodium adsorption ratio (SAR) results above the COGCC Table 915-1 soil standards and/or site-specific background levels (x 1.25 for metals). Groundwater has not been encountered during the site assessment activities conducted to date. Excavation and
site assessment activities are ongoing, and will be summarized in a forthcoming Form 27-Supplemental update. Soil sample location and field screening data are provided in Table 1. |
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| RECLAMATION PLAN: | Following the completion of excavation and assessment activities, the site will be restored to its pre-release grade, and the site will be reclaimed in accordance with COGCC 1000 Series Reclamation Rules. |
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| SOURCE REMOVED: | Excavation and site assessment activities are ongoing, and impacted soil will be transported off-site for disposal at a licensed disposal facility. Confirmation soil samples will be collected from the final excavation extents and submitted for laboratory analysis of the COGCC-approved reduced analyte list described herein. |
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| Correspondence Log: |
| Final Resolution | | Date | Case Closed? | Letter Sent? | CECMC Person | | N/A | N | | Alexander Ahmadian | | | 7/30/2024 | Y | | Alexander Ahmadian | | | N/A | N | | Alexander Ahmadian | | | N/A | N | | Alexander Ahmadian | | | N/A | N | | Alexander Ahmadian | | | N/A | N | | Alexander Ahmadian | |
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| Coordinates: |
| Type | Facility ID | Facility Name/Num | Lat/Long |
| Remediation | 288028 | MILLER
23-24 | 40.209016/-104.727419 |
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| Facility | 483772 | Miller 23-24 Wellhead Reclamation
| 40.209020/-104.727420 |
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