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The following spills were reported to the Colorado Oil and Gas Conservation Commission in the past two weeks.

Information is based on Form 19, which operators must fill out detailing the leakage/spill events. Any spill release that may impact waters of the state must be reported as soon as practical. Spills and leaks typically are found during routine maintenance on existing wells, though some actual “spills” do occur among the 18,000-plus wells in the county.

» EXTRACTION OIL & GAS INC reported Aug. 6 a recent tank battery spill near U.S. 85 and Weld County Road 104 in Nunn. An unknown amount of oil, condensate and produced water spilled. Crews found a failure of the maintenance line during capping. The volume of the release is unknown. The line was flushed and blown down while awaiting repairs and cleanup.

» CRESTONE PEAK RESOURCES OPERATING LLC reported Aug. 5 a historical well spill near Weld 51 and 49, about 8 miles southwest of Keenesburg. An unknown amount of oil, condensate and produced water spilled. Historical impacts were found during decommissioning and reclamation.

» BLUE CHIP OIL INC reported Aug. 2 a historical spill near Weld 72 and 25 in Severance. Less than 1 barrel of oil spilled. Contaminated soil was found near the base of the flowline risers during decommissioning. The historic release was not actively leaking. Upon discovery, the extent was determined and excavated. All flowlines were removed.

» NOBLE ENERGY INC reported Aug. 1 a historical well spill near Weld 57 and 46, about 9 miles south of Kersey. An unknown amount of oil, condensate and produced water spilled. Lab analysis indicated a historical release at the decommissioned wellhead. One soil sample exceeded COGCC protection of groundwater standards for benzo(a)anthracene.

» PDC ENERGY INC reported Aug. 1 a recent tank battery spill near Weld 31 and West O Street in Greeley. Between 5 and 100 barrels of produced water spilled. The operator found the spill at the separator. The source of the spill was controlled and inside containment. The volume and cause of the spill are being determined. Clean-up and delineation are underway.

» KERR MCGEE OIL & GAS ONSHORE LP reported July 29 a historical well spill near Weld 12 and Colorado Boulevard in Dacono. An unknown amount of oil, condensate and produced water spilled. Historically impacted soil was found following cut and cap at the wellhead. Excavation and assessment are ongoing.

» NOBLE ENERGY INC reported July 29 a historical tank battery spill near Weld 53 and 38, about 14 miles south of Kersey. An unknown amount of oil, condensate and produced water spilled. Lab analysis indicated a historical release occurred at the northern and southern produced water vessels for the decommissioned tank battery. One soil sample exceeded COGCC standards for 1-methylnaphthalene.

» KERR MCGEE OIL & GAS ONSHORE LP reported July 28 a historical tank battery spill near Weld 40 and 15, about 6 miles northeast of Mead. An unknown amount of oil, condensate and produced water spilled. Historically impacted soil was found below the former produced water vessel during decommissioning. Excavation and assessment are ongoing.

» KP KAUFFMAN COMPANY INC reported July 25 a recent pipeline spill near Weld 12 and Colorado Boulevard in Dacono. An unknown amount of natural gas consolidation spilled. Operators were conducting camera inspections and found evidence of a release along the natural gas consolidation line. Crews shut in the line and attached a vac truck to remove the remaining natural gas within the line. The source was removed.

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