<_x0034_01034055>

401034055 19 2016-04-22T10:00:41.45-06:00 8960 BONANZA CREEK ENERGY OPERATING COMPANY LLC

410 17TH STREET SUITE #1400

DENVER CO 80202 Brian Dodek 720 2256653 Brian Dodek Sr Env Specialist 2016-04-22T10:00:41.45-06:00 2016-04-22T10:00:41.433-06:00 444394 in process bdodek 2016-04-22T09:04:30.84-06:00 bdodek bdodek@bonanzacrk.com 0.00000 bdodek@bonanzacrk.com bdodek bdodek 2016-04-22T10:00:39.2-06:00 400956691 401034055 CHESSON, BOB 2015-12-17T00:00:00-07:00 TANK BATTERY WELD NWNE 4 4N 62W 6 Y NON-CROP LAND 7 degrees, windy, mostly cloudy 0 0 During production a separator rupture disc failed releasing approximately 4.5 bbls of oil inside containment and an oil spray calculated to be approximately 2.6 bbls outside containment. Crews were immediately dispatched to begin removal of the pooled oil in containment and the oil spray that was confined to the surface of the snow at the location. Once the cleanup activities are complete, environmental personnel will collect soil samples to confirm the remaining surface soil is compliant with COGCC Table 910-1 standards. 433884 400956691 true 2015-12-17T00:00:00-07:00 40.348697 -104.326696 STATE 0 0 0 true <_x0032_7_approved>false S false >=5 and <100 0 0 0 0 true false false true false 0 2015-12-17T23:52:24.28-07:00 401034055 401034055 FORM 19 SUBMITTED 401034055.pdf 401034055 401034130 ANALYTICAL RESULTS F19 NFA Attachment.pdf 1465040 401034055 1 SPILL 2015-12-18T00:00:00-07:00 State Land Board Matt Pollart

Notified of release

on file 401034055 2 SPILL 2015-12-18T00:00:00-07:00 Weld County Roy Rudisil

Notified of release

on file 401034055 3 SPILL 2015-12-18T00:00:00-07:00 COGCC Bob Chesson

Notified of release via eForm 19

on file 401034055 1 2016-04-22T00:00:00-06:00 0 0 true false false false false false false The release extent was determined by visual delineation. The release occurred over thick snow cover and was easily defined. Valent Sand, 3 to 9 percent slopes 20 1 2702 2971 Following remediation activities, confirmation soil samples were collected from the release footprint. The laboratory analytical results confirm that the remaining soil is compliant with COGCC Table 910-1 standards. Bonanza Creek is requesting a no further action determination. 7 0 0 0 0 0 0 0 0 0 false false 0 0 false false false false false false false false true true true true 245 145 2 401034055 1 2016-04-22T00:00:00-06:00 false true false false A pressure relief device failed and released 4.5 bbls of oil inside containment and 2.6 bbl outside containment(spray). The rupture disc was replaced with a new PRV valve to prevent failure in the future. 175 true false false 0 0 Thread was being aborted.