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400715483 19 2014-10-23T10:22:27.14-06:00 96850 WPX ENERGY ROCKY MOUNTAIN LLC

1001 17TH STREET - SUITE #1200

DENVER CO 80202 Karolina Blaney 970 6832295 970 2859573 Karolina Blaney Environmental Specialist 2014-10-23T10:22:27.14-06:00 2014-10-23T10:22:27.11-06:00 437268 in process blaneyk 2014-10-23T10:12:30.923-06:00 blaneyk karolina.blaney@wpxenergy.com 0.00000 karolina.blaney@wpxenergy.com blaneyk blaneyk 2014-10-23T10:22:22.173-06:00 400611163 400715483 Spencer, Stan 2014-05-19T00:00:00-06:00 WELL PAD RIO BLANCO NESW 14 2S 98W 6 N N NON-CROP LAND warm, sunny, dry 0 0 One of the frac tanks on location developed a hole which resulted in a flow back water spill. The entire release was contained within the pad’s perimeter berm. None of the fluids left the location. 335969 400611163 N true 2014-05-19T00:00:00-06:00 39.873910 -108.364169 FEDERAL 0 0 0 true <_x0032_7_approved>false S false 0 0 0 0 >=5 and <100 true Can be closed w supplemental F-19 if all fluids contained and recovered. false false true false 0 2014-05-19T15:22:59.39-06:00 400715483 Attached are the laboratory reports and the sample location map for the soil samples collected from the impacted area and nearby non-impacted native soil in order to close the historical produced water release that occurred at the RG 23-14-298 well pad and was discovered on May 19, 2014. • One grab sample was collected from the impacted area and was analyzed for the constituents listed in Table 910-1. • Three grab samples were collected from nearby non-impacted, native soil to establish the background concentrations for arsenic. In accordance with the COGCC Rule 910.b.(3)E. one grab sample was analyzed for inorganics to establish background soil conditions. As the attached lab reports indicate, all constituents of concern listed in the COGCC Table 910-1 tested below the cleanup requirements or below the background concentrations with the exception of the inorganics. Therefore, in accordance with COGCC guideline Q32 regarding inorganics, the excavation was covered with 3’ of clean soil during backfilling activities in order to account for this exceedance. Based on these results, WPX respectfully requests closure of this incident. 400715483 400715483 FORM 19 SUBMITTED 400715483.pdf 400715483 400715493 OTHER RG 23-14-298 spill closure attachment.pdf 2355589 400715483 1 SPILL 2014-05-19T00:00:00-06:00 COGCC Stan Spencer

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970 625-2497 400715483 2 SPILL 2014-05-19T00:00:00-06:00 BLM Justin Wilson

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970 878-3825 400715483 3 SPILL 2014-05-19T00:00:00-06:00 County Mark Sprague

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970 878-9584 400715483 4 SPILL 2014-05-19T00:00:00-06:00 Fire Department Steve Allen

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970 824-1682 400715483 5 SPILL 2014-05-19T00:00:00-06:00 Rio Blanco County Env. Health Jeremy Simmons

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970 878-9526 400715483 6 SPILL 2014-05-19T00:00:00-06:00 Rio Blanco County Sheriff Si Woodruff

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