| Form 27/27A |  Related  Doc |
| Date Submitted: | 10/30/2023 |
| Date Recv'd: | 10/30/2023 | Assigned by: | Laurel Anderson |
| DocNum: | 403575609 | Facility ID: | 484969 |
| Document Type: | FORM 27 | Project Number: | 33237 |
| Operator Information: |
| Operator: | PDC ENERGY INC |
| Oper. No. | 69175 |
| Address: | 1099 18TH STREET SUITE 1500 DENVER CO 80202 |
| Type Of Facility: | SPILL OR RELEASE |
| Fac. Name | Phelps 32 Sec Separator |
| County Name: | WELD |
| Operator contact: | Jason Davidson |
| qtrqtr: SENE | section: 32 | township: 1N | range: 66W | meridian: 6 |
|
| Remediation Details: |
|
| Reason for Report: SPILL |
| Cause of Condition: MULTIPLE |
| Potential Receptors: Unnamed Drainage and associated Wetland: 100’ S
Irrigation Ditch: 630’ SW
Unnamed Ponds: 600’ S, 580 |
| |
| FURTHER SITE INV: | Refer to the Proposed Soil Sampling, Proposed Groundwater Sampling, and Additional Investigative Actions sections of this Form 27. |
| |
| HOW REMEDIATE: | Dissolved phase groundwater impacts remain on site following the removal of impacted soils. No further excavation is required. Soil borings completed as monitoring wells will be installed within and adjacent to the excavation to define the magnitude and extent of residual groundwater impacts. After four consecutive quarters of groundwater samples are in compliance with the ECMC Table 915-1 standards, a NFA designation will be requested.
Refer to the Source Removal Summary above. |
| |
| INITIAL ACTION: | On 8/19/23, a broken site glass on the Phelps 11-32 CHZ separator resulted in the release of less than 1 barrel of produced fluids. Impacted surface soil was excavated using a hydrovac.
During additional soil removal activities on 8/21/23, groundwater was encountered at a depth of approximately 3 feet below ground surface (bgs). Free phase condensate was observed on the surface of the groundwater.
Approximately 3 cubic yards of impacted soil and groundwater were removed from the impacted area via hydrovac and transported to Republic Services Tower Road Landfill in Commerce City, CO for disposal under PDC manifest in accordance with Rules 905 and 906. Copies of the waste manifests are available upon request.
Soil samples were collected on 8/23/23 and analyzed for the full ECMC Table 915-1 suite of analytes by ECMC approved methods. A grab groundwater sample was also collected from the base of the excavation and analyzed for ECMC Table 915-1 Organic Compounds in Groundwater by ECMC approved methods. The laboratory data are summarized in Tables 1 to 6 and illustrated on Figure 3.
Based on the laboratory data, petroleum constituents in the unsaturated soil have been adequately remediated. However, arsenic, barium, electrical conductivity (EC) and/or sodium adsorption ratio (SAR) concentrations were above the ECMC Table 915-1 standards in the soil samples. Further, the benzene concentration in the groundwater sample exceeded the ECMC Table 915-1 standard. |
| |
| MONITORING PLAN: | Groundwater was encountered at a depth of approximately 3 feet bgs at the Site. Free phase condensate was observed on the surface of the groundwater. Refer to the Proposed Groundwater Sampling section of this Form 27. |
| |
| RECLAMATION PLAN: | The Phelps12-32NHZ facility is an active facility and there are no current plans for decommissioning or reclamation activities. |
| |
| SOURCE REMOVED: | On 8/19/23, during initial excavation activities, impacted surface soils were removed using a hydrovac.
During additional soil removal activities on 8/21/23, approximately 3 cubic yards of impacted soil and groundwater were removed from the impacted area via hydrovac and transported to Republic Services Tower Road Landfill in Commerce City, CO for disposal under PDC manifest in accordance with Rules 905 and 906. Copies of the waste manifests are available upon request. |
| |
| Correspondence Log: |
| |
| Coordinates: |
| Type | Facility ID | Facility Name/Num | Lat/Long |
| Facility | 484969 | Phelps 32 Sec Separator
| 40.011100/-104.792570 |
|