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401038066 19 2016-04-28T14:00:51.25-06:00 10084 PIONEER NATURAL RESOURCES USA INC

5205 N O'CONNOR BLVD STE 200

IRVING TX 75039 James Roybal 719 846-7898 James Roybal Environmental Supervisor 2016-04-28T14:00:51.25-06:00 2016-04-28T14:00:51.233-06:00 445603 in process jamesroybal 2016-04-28T13:34:45.517-06:00 jamesroybal james.roybal@pxd.com 0.00000 james.roybal@pxd.com jamesroybal jamesroybal 2016-04-28T14:00:47.797-06:00 401034851 401038066 Kosola, Jason 2016-04-22T00:00:00-06:00 WELL 05 071 09255 LAS ANIMAS NWNE 25 32S 66W 6 Y NON-CROP LAND Warm sunny 0 0 A third party contractor for Pioneer arrived on site and found the packing on the well head leaking. Calls were made and the Lease operator arrived and replaced the packing. It is estimated the 20bbls of produced water were spilled on the location. All of the water remained on site. No state waters were involved. The water from this well normally goes to CDPHE permitted outfall: Joyce 057A 401034851 true 2016-04-22T00:00:00-06:00 37.235370 -104.729150 FEE 0 0 0 true <_x0032_7_approved>false S false 0 0 >=5 and <100 0 0 true false true false false 0 2016-04-24T08:20:03.637-06:00 401038066 Produced water quality data from the well associated with or representative of the spill is attached. Pioneer and its consulting geochemical specialists have found, after 20 years operating in the Raton Basin CBM field, that soil sampling no longer adds useful data on smaller, short-term spills as land uses and the environment are not sensitive to short-term exposure to CBM produced water. Effects to soil chemistry from short-term CBM produced water spills are temporary and shallow for several reasons: the water does not contain crude oil or liquid hydrocarbons; the TDS is significantly less than 10,000 mg/L; it is suitable for livestock watering, wildlife and in many cases surface discharge. Mixed with other water it is suitable for irrigation without impact. When requested by the agency or landowner Pioneer has and will collect soil samples. Pioneer Natural Resources request closure of this spill based on this statement and attached water quality data. 401038066 401038066 FORM 19 SUBMITTED 401038066.pdf 401038066 401038148 ANALYTICAL RESULTS Toltek Federal 31-25 chemistry 2009-07-29.pdf 206714 401038066 1 SPILL 2016-04-23T00:00:00-06:00 COGCC Jason Kosola

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401038066 2 SPILL 2016-04-23T00:00:00-06:00 LACOG Bob Lucero

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401038066 1 2016-04-28T00:00:00-06:00 0 0 true false false false false false 0 false Visual inspection From the NRCS soil survey map: Gulnare-Allens Park Complex 75 7 1140 780 1100 The Packing on the well was replaced and put back in normal operation. The operator remained on site to varify the packing was not leaking. 0 0 0 0 20 0 0 0 0 0 false false 0 0 false false false false false false false false true true false true 150 10 0 401038066 1 2016-04-28T00:00:00-06:00 false true false false Normal Wear and tear/ inadequate maintenance was determined as root cause. Well was down for about nine months and had only been running for about 1 month. When the well was started the operator had greased the packing but had not replaced it. It will be communicated to the lease Operators that the packing on wells that have not been running for longer than 3 months, will be repalced prior to being started. false false false Thread was being aborted.