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401082913 19 2016-07-22T15:30:33.47-06:00 10110 GREAT WESTERN OPERATING COMPANY LLC

1801 BROADWAY #500

DENVER CO 80202 Scot Donato 303 398-03032 303 549-7739 Rachel Peterson Project Manager 2016-07-22T15:30:33.47-06:00 2016-07-22T15:30:33.453-06:00 445284 in process RachelPetersonWH 2016-07-22T15:08:14.733-06:00 RachelPetersonWH petersonr@agwco.com 0.00000 sdonato@gwogco.com RachelPetersonWH RachelPetersonWH 2016-07-22T15:30:31.077-06:00 401015105 401082913 ALLISON, RICK 2016-03-22T00:00:00-06:00 TANK BATTERY WELD NESE 15 6N 67W 6 N NON-CROP LAND clear 0 0 GWOC recently relocated the Haas #1 Tank Battery. As a result of that process, GWOC identified a historical release of produced water. impacted soils were noted and excavated. Soil samples collected from the walls and base of the excavation, and from the stockpile contained concentrations of TPH which exceed Table 910-1 concentrations. 319611 401015105 false 2016-03-22T00:00:00-06:00 40.484493 -104.872766 Windsor FEE 0 0 0 false <_x0032_7_approved>false S false undeveloped 0 0 Unknown 0 0 false false false true false 0 2016-03-24T20:45:11.703-06:00 401082913 Updated information about the nearest water well is included in this Supplemental Report, per your request in an email dated 4/18/16. Well permit # 978-R- was initially thought to be within 200 feet of the spill location. The well has been properly identified, and is located approximately 850 feet south of the release location. Please see attached aerial photograph depicting the release and the well. Additional information regarding the presence of groundwater impact and the approximate area of soil impact are included. A Form 27 Corrective Action form will be submitted. 401082913 401082913 FORM 19 SUBMITTED 401082913.pdf 401082913 401082964 SITE MAP well location.pdf 421169 401082913 1 SPILL 2016-03-22T00:00:00-06:00 COGCC Rick Allison

notified by email

401082913 2 SPILL 2016-03-22T00:00:00-06:00 Weld County Troy Swain

notified by email

401082913 3 SPILL 2016-03-24T00:00:00-06:00 Town of Windsor Joe Plummer

notified by email

401082913 4 SPILL 2016-03-22T00:00:00-06:00 Surface Owner Journey Homes

notified by email

401082913 1 2016-07-22T00:00:00-06:00 0 0 true true false false false false 10 false On May 3, 2016, AGW advanced a total of nine boreholes, advanced to depths of 10 feet to 15 feet bgs. Four broeholes were advanced into the shallow groundwater aquifer for sample collection. Soils encountered during this project generally consisted of brown and gray sandy and silty clays, with sand and silty sand present at approximately 7 feet to 10 feet bgs. 10 10 850 700 0 0 1400 Updated information about the nearest water well is included in this Supplemental Report, per your request in an email dated 4/18/16. Well permit # 978-R- was initially thought to be within 200 feet of the spill location. The well has been properly identified, and is located approximately 850 feet south of the release location. Please see attached aerial photograph depicting the release and the well. 0 0 0 0 0 0 0 0 0 false false 0 0 false false true false false false false false false false false false 40 30 Thread was being aborted.