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401103390 19 2016-09-02T10:06:44.733-06:00 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 2016-09-02T10:06:44.733-06:00 2016-09-02T10:06:44.72-06:00 447518 in process jamesroybal 2016-09-02T09:36:51.64-06:00 jamesroybal james.roybal@pxd.com 0.00000 james.roybal@pxd.com jamesroybal jamesroybal 2016-09-02T10:06:42.97-06:00 401102126 401103390 Kosola, Jason 2016-08-30T00:00:00-06:00 WELL 05 071 07893 LAS ANIMAS NENE 2 33S 66W 6 Y NON-CROP LAND hot sunny 0 0 We had a spill that occurred yesterday 8/30/16 on the Stacie 41-2 well site (API# 05-071-07893). A lease operator was dispatched to site to investigate a leaky well head. When arrived the operator found the packing on the well head to be leaking. The leak was repaired during this time. It is estimated that 3bbls of produced water were spilled. All of the water remained on the location with No state waters involved. The land owner has been notified. 401102126 true 2016-08-30T00:00:00-06:00 37.205290 -104.743710 FEE 0 0 0 true <_x0032_7_approved>false S false 0 0 >=1 and <5 0 0 false false true false false 0 2016-08-31T10:08:41.313-06:00 401103390 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. 401103390 401103390 FORM 19 SUBMITTED 401103390.pdf 401103390 401103485 ANALYTICAL RESULTS Copy of Stacie 41-2 water quality.pdf 18135 401103390 1 SPILL 2016-08-30T00:00:00-06:00 COGCC Jason Kosola

email

401103390 2 SPILL 2016-08-30T00:00:00-06:00 LACOG Bob Lucero

email

401103390 3 SPILL 2016-08-30T00:00:00-06:00 land owner Dave Gourdin

phone call

401103390 1 2016-09-02T00:00:00-06:00 0 0 true false false false false false false Visual inspection From the NRCS soil survey map: Gulnare Allens park complex 75 1 2200 430 1500 Lease operator repaired the packing at time of incident. 0 0 0 0 3 0 0 0 0 0 false false 0 0 false false false false false false false false true true false true 50 4 401103390 1 2016-09-09T00:00:00-06:00 false true false false Root cause was determined as mechanical failure due to normal wear and tear/inadequate maintenance. Pioneer is going to implement a training program to install and maintain packing properly. false false false Thread was being aborted.