| Form 27/27A |  Related  Doc |
| Date Submitted: | 9/29/2020 |
| Date Recv'd: | 9/29/2020 | Assigned by: | Rick Allison |
| DocNum: | 402492917 | Facility ID: | 477881 |
| Document Type: | FORM 27 | Project Number: | 15983 |
| Operator Information: |
| Operator: | BONANZA CREEK ENERGY OPERATING COMPANY LLC |
| Oper. No. | 8960 |
| Address: | 555 17TH STREET SUITE 3700 DENVER CO 80202 |
| Type Of Facility: | SPILL OR RELEASE |
| Fac. Name | Park U-4-9XRLC Flowline |
| County Name: | WELD |
| Operator contact: | Jacob Evans |
| qtrqtr: SWSW | section: 34 | township: 5N | range: 63W | meridian: 6 |
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| Remediation Details: |
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| Reason for Report: SPILL |
| Cause of Condition: SPILL OR RELEASE |
| Potential Receptors: Wetlands ~900' SE, CR 50 ~400' W, Irrigation Ditch ~600' SW, Empire Intake Ditch ~1,200' S, Ocupied |
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| HOW REMEDIATE: | Bonanza Creek is developing an in situ remediation system. Additional details on remediation will be included in supplemental Form 27s as the program is developed. |
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| INITIAL ACTION: | Internal corrosion allowed approximately 1,120 bbls of oil and 280 bbls of produced water to be released to the ground and subsurface. Once discovered the flowline was immediately shut in to stop the release and blown down to alleviate the remaining pressure on the line. The pooled fluid and approximately top 18” of soil were removed and hauled to a COGCC approved disposal facility. Ten potholes were dug and sampled to delineate the lateral extent of the subsurface impact and eight soil borings will drilled to delineate the vertical impact. Soil and groundwater samples were collected and submitted for laboratory analysis. An approximately 40’ x 40’ bell hole was dug around the flowline so the compromised section of the line could be removed and analyzed. The impacted soil was hauled to a COGCC approved disposal facility. Ten bags of activated carbon where mixed into the excavation to promote biodegradation.
Bonanza Creek is currently working with an environmental consultant to develop an in situ remediation system to treat the remaining soil and groundwater remaining impact. Once the system is developed Bonanza Creek will update the Form 27 with additional information.
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| MONITORING PLAN: | Bonanza Creek is developing an in situ remediation system. Additional details on remediation will be included in supplemental Form 27s as the program is developed. |
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| RECLAMATION PLAN: | Upon installation of the remediation system, the disturbance area will be completely reclaimed to pre-disturbance conditions. Any excavations will be backfilled. The release footprint is located on a flat surface so recontouring will not be required. The area will be cross-ripped to a depth of ~18" to alleviate compaction. Topsoil and compost will be trucked in and the area will be crimped with straw and seeded with a surface owner approved seed mix. |
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| SOURCE REMOVED: | The source of the release will be removed by physically removing the impact as well as the installation of an in situ remediation system. |
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| Correspondence Log: |
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| Coordinates: |
| Type | Facility ID | Facility Name/Num | Lat/Long |
| Facility | 477881 | Park U-4-9XRLC Flowline
| 40.348840/-104.429914 |
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