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.

» NOBLE ENERGY INC reported Nov. 22 a historical well spill near Weld County roads 52 and 57, about 2 miles southeast of Kersey. An unknown amount of oil, condensate and produced water spilled. Impacted soil was found during cut and cap operations at the wellhead. Lab analysis is pending. Assessment will be scheduled.

» CRESTONE PEAK RESOURCES OPERATING LLC reported Nov. 19 a recent tank battery spill near Weld 24 and 19, northeast of Firestone. An unknown amount of oil and produced water spilled. Pooled water was found around the separator during routine inspection. A fire tube failure in the separator is believed to have spilled the produced water and crude oil. Surface staining indicates about 1 barrel of produced water was spilled, but the total quantity is unknown. The facility was immediately shut in, and the separator was isolated and drained. Cleanup, delineation and lab analysis are ongoing.

» BONANZA CREEK ENERGY OPERATING COMPANY LLC reported Nov. 17 a recent tank battery spill about 1 mile west of Weld 58 and 89, about 8 miles northwest of Galeton. An unknown amount of produced water spilled. A compromised produced water tank spilled liquids inside the lined containment structure. The tank will be bottomed out and marked out of service. Impacted ballast will be removed, and the integrity of the liner will be verified.

» CRESTONE PEAK RESOURCES OPERATING LLC reported Nov. 18 a recent tank battery spill near Weld 20 and Coal Ridge Ditch, in Firestone. About 60 gallons of produced water spilled. A truck operator removing produced water from on-site storage tanks overfilled the truck tank and mishandled the hose, spilling the produced water to the pad surface. Most liquids on the surface were recovered, and 2-3 cubic yards of soil were removed. Delineation and lab analysis are underway.

» GREAT WESTERN OPERATING COMPANY LLC reported Nov. 16 a historical well spill near Weld 74 and 61, about 5 miles east of Gaelton. An unknown amount of oil, condensate and produced water spilled. Potential soil impacts were seen March 31 during excavation for cut and cap activities. Additional excavation on Aug. 5 confirmed the release. Cleanup is complete.

» PDC ENERGY INC reported Nov. 15 a recent spill near 37th Street and 77th Avenue, west of Evans. Between 5 and 100 barrels of produced water spilled. The operator found the spill near the separators. The spill was inside secondary containment. Cleanup and delineation are underway.

» NOBLE ENERGY INC reported Nov. 9 a historical flowling system spill near Weld 48 and 61, about 4 miles southeast of Kersey. An unknown amount of oil and produced water spilled. Lab analysis conducted during decommissioning indicated the release. One soil sample exceeded COGCC standards for total petroleum hydrocarbons.