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. Any spill of five barrels or more must be reported within 24 hours, and any spill of one barrel or more, which occurs outside secondary containment, such as metal or earthen berms, must also be reported within 24 hours, according to COGCC rules. Spills and leaks typically are found during routine maintenance on existing wells, though some actual “spills” do occur among the 24,000-plus wells in the county.

* CRESTONE PEAK RESOURCES OPERATING LLC, reported March 25 a well pad spill about 2.5 miles southwest of Platteville, near Weld County roads 28 and 19. Between five and 100 barrels of condensate spilled. A valve was closed on the recirculating tank as crews were flowing back the wells, causing the tank to overfill. Condensate spilled over into containment and outside of containment due to a slightly opened valve near the incinerator.

* KERR MCGEE OIL & GAS ONSHORE LP, reported March 21 a historical tank battery spill about 1 mile northeast of Fort Lupton, near Weld roads 18 and 31. Less than five barrels of oil, condensate and produced water spilled. Waters of the state were impacted or threatened. A groundwater sample from 7.5 feet below ground surface indicated a benzene concentration above COGCC standards.

* PDC ENERGY INC, reported March 20 a historical production facility west of Greeley, near 10th Street and 83rd Avenue. Less than five barrels of oil spilled. Crews found the spill at the separator while abandoning the production facility.

* WHITING OIL & GAS CORPORATION, reported March 20 a tank battery spill 7 miles northwest of Avalo, near Weld roads 120 and 133. About 60 barrels of produced water spilled. The spill, which was in lined containment, is associated to a tee on the produced water fill line. The cause is under investigation.

* KERR MCGEE OIL & GAS ONSHORE LP, reported March 19 a historical tank battery spill about 3 miles northeast of Firestone, near Weld roads 22 and 23. Less than five barrels of oil, condensate and produced water spilled. Crews found historical impacts during abandonment activities.

* PDC ENERGY INC, reported March 18 a drilling spill about 3 miles southeast of Gilcrest, near Weld roads 38 and 39. Between one and five barrels of water-based bentonitic drilling mud spilled. Waters of the state and a surface water supply area were impacted or threatened. Extreme weather blew the drilling mud off the beneficial reuse area onto into the adjacent irrigation ditch to the south.