| Form 27/27A |  Related  Doc |
| Date Submitted: | 9/8/2022 |
| Date Recv'd: | 9/8/2022 | Assigned by: | Kari Brown |
| DocNum: | 403158691 | Facility ID: | 318259 |
| Document Type: | FORM 27 | Project Number: | 24884 |
| Operator Information: |
| Operator: | KERR MCGEE OIL & GAS ONSHORE LP |
| Oper. No. | 47120 |
| Address: | P O BOX 173779 DENVER CO 80217-3779 |
| Type Of Facility: | LOCATION |
| Fac. Name | WILLIAM DEASON GAS UNIT-61N66W |
| County Name: | WELD |
| Operator contact: | Erik Mickelson |
| qtrqtr: NWSE | section: 6 | township: 1N | 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: The nearest building is located approximately 180 feet northeast of the facility.
The nearest domest |
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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 June 13, 2022, historical soil impacts were discovered during reclamation activities at the previously decommissioned Deason William GU 1 O SA Production Facility. The COGCC issued Spill/Release Point ID 482371 for this release. On June 22, 2022, excavation activities were initiated, and initial soil and groundwater samples were collected to determine if impacts were present. Based on field observations and PID readings, soil sample REC-N01@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. Preliminary analytical results indicated that soil impacts were present due to polycyclic aromatic hydrocarbons (PAHs), boron, barium (Ba), and lead (Pb) concentrations above COGCC Table 915-1 standards and/or site-specific background levels. Groundwater was encountered within the excavation area at approximately 3 feet below ground surface (bgs). 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 surface 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: | To-date, approximately 300 cubic yards of impacted soil have been excavated and transported to the Front Range Landfill in Erie, Colorado for disposal; approximately 60 cubic yards of impacted soil have been excavated and transported to the Buffalo Ridge Landfill in Keenesburg, Colorado. Following the collection of groundwater sample REC-GW01, approximately 500 barrels of non-impacted groundwater have been removed from the excavation area via vacuum truck, for backfilling and sidewall stabilization purposes, and transported to the Kerr-McGee Aggregate Recycle Facility in Weld County, Colorado for recycling. Excavation and site assessment activities are ongoing and will be summarized in a forthcoming Form 27-Supplemental update. |
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| Correspondence Log: |
| Final Resolution | | Date | Case Closed? | Letter Sent? | CECMC Person | | N/A | N | | Alexander Ahmadian | | | N/A | N | | Kari Brown | | | N/A | N | | Laurel Anderson | | | N/A | N | | Robert Chesson | | | N/A | N | | Laurel Anderson | | | N/A | N | | Laurel Anderson | | | N/A | N | | Kari Brown | |
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| Coordinates: |
| Type | Facility ID | Facility Name/Num | Lat/Long |
| Facility | 318259 | WILLIAM DEASON GAS UNIT-61N66W
6NWSE | 40.076840/-104.818120 |
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| Remediation | 482371 | Deason William GU 1 Tank Battery
| 40.077534/-104.818122 |
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