| Form 27/27A |  Related  Doc | | Date Submitted: | 8/20/2024 | | Date Recv'd: | 8/20/2024 | Assigned by: | Chris Canfield | | DocNum: | 403883475 | Facility ID: | 486891 | | Document Type: | FORM 27 | Project Number: | 36714 | | 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 | Gus LD Pad | | County Name: | ADAMS | | Operator contact: | Michelle Bartoszek | | qtrqtr: SENE | section: 21 | township: 1S | range: 67W | meridian: 6 |
| | Remediation Details: | | | Reason for Report: SPILL | | Cause of Condition: SPILL OR RELEASE | | Potential Receptors: Domestic Water Wells within 1/4 mile - 857' SE - Permit #227657--A, Receipt #3649660; 1303' SE - Per | | | | FURTHER SITE INV: | At least one background sample will be collected from "comparable non-impacted soil" as per EPS General Comments on document number: 403826338. Therefore, PDC shall collect a background sample within the facility away from hydrocarbon impacted material as this is a recent spill and not a final reclamation site. Background samples will be analyzed for Table 915-1 Metals in Soils and Suitability for Soil Reclamation parameters.
Additionally, a supplemental site investigation (SSI) will be conducted to further vertically and horizontally delineate the pH, SAR, EC and boron exceedances identified during confirmation sampling. The results of the SSI will be submitted on a subsequent Form 27. | | | | HOW REMEDIATE: | A remedial excavation was conducted to remove impacted soils from the firetube release within the secondary containment. This excavation has adequately remediated petroleum constituents in the release area. However, elevated pH, SAR, EC, boron, arsenic, barium, cadmium, chromium IV, lead and selenium remain to be resolved.
On 5/30/24, a produced fluids sample was collected from the separator and analyzed for total recoverable metals. These data were used to determine the mass of metals that were released in the 0.53 BBL release. This mass was compared to the calculated mass of metals removed as a result of the excavation.
-As shown on Table 5, the amount of arsenic removed was approximately 1,914,705 times more than the amount of arsenic that was released.
-As shown in Table 6, the amount of barium removed was approximately 589 times more than the amount of barium that was released.
-As shown in Table 7, the amount of selenium removed was approximately 87,000 times more than the amount of selenium that was released.
-As shown in Table 8, the amount of lead removed was approximately 5,689,000 times more than the amount of lead that was released.
-As shown in Table 9, the amount of cadmium removed was approximately 141,127 times more than the amount of cadmium that was released.
-As shown in Table 10, the amount of chromium IV removed was approximately 11,382 times more than the amount of chromium IV that was released.
Since the amount of arsenic, barium, selenium, lead, cadmium and chromium IV removed were significantly greater than the amount of these metals that were released, the additional metals removed can be attributed to native concentrations and the presence of these metals in the excavation samples can be considered adequately remediated.
Additionally, a supplemental site investigation (SSI) will be conducted to further vertically and horizontally delineate the pH, SAR, EC and boron exceedances identified during confirmation sampling. | | | | INITIAL ACTION: | On 5/29/24, a non-reportable release was discovered at the Gus LD pad when 0.53 BBL of produced fluids were observed at the north end of a failed bulk separator fire tube. Excavation activities via hydrovac commenced upon discovery. The release became reportable on 5/30/24 when it was confirmed that over 10 cubic yards of impacted material had been removed from location. Fluid was contained on-site within the steel walled containment area but there was no lining within the containment. A total of approximately 24 cubic yards of impacted soil material has been removed from site and properly disposed of. | | | | MONITORING PLAN: |
Groundwater was not encountered in the excavation.
| | | | RECLAMATION PLAN: | The Gus LD Pad is an active facility and there are no current plans for decommissioning or reclamation activities. | | | | SOURCE REMOVED: | Excavation via hydrovac trucks was completed between May 30, 2024 and June 3, 2024. Approximately 24 cubic yards of impacted soil were transported to Republic Services Tower Road Landfill in Commerce City, CO and Waste Management Buffalo Ridge Landfill in Keenesburg, CO for disposal. | | | | Correspondence Log: | | Final Resolution | | Date | Case Closed? | Letter Sent? | CECMC Person | | N/A | N | | Chris Canfield | | | N/A | N | | Alexander Ahmadian | |
| | | | Coordinates: | | Type | Facility ID | Facility Name/Num | Lat/Long | | Facility | 486891 | Gus LD Pad
| 39.952212/-104.885496 |
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