<_x0034_00624097>

400624097 19 2014-06-11T06:58:12.017-06:00 69175 PDC ENERGY INC

1775 SHERMAN STREET - STE 3000

DENVER CO 80203 Brandon Bruns 303 831-3971 Brandon Bruns EHS Supervisor 2014-06-11T06:58:12.017-06:00 2014-06-11T06:58:11.983-06:00 in process bbruns 2014-06-10T11:59:48.017-06:00 bbruns brandon.bruns@pdce.com 0.00000 brandon.bruns@pdce.com bbruns bbruns 2014-06-11T06:58:10.47-06:00 400624097 400624097 2014-03-13T00:00:00-06:00 WELL 05 123 11060 WELD NENW 6 2N 67W 6 N CROP LAND sunny, 50 degrees 0 0 On March 13, 2014, a historic release was discovered during the removal of the buried produced water vessel at the Coors Fee 2,12-6; Coors V6-4,5,6 (API # 05-123-11060, Facility # 311415) tank battery. Wells Coors Fee 2-6 (API # 05-123-11060), Coors Fee 12-6 (API # 05-123-19610), Coors V6-4 (API # 05-123-17322), Coors V6-5 (API # 05-123-17251), and Coors V6-6 (API # 05-123-17243) produce to this location. The facility was shut in and subsequent excavation activities commenced below the release location. A topographic map of the site is included as Figure 1. 400624097 false 2014-03-13T00:00:00-06:00 40.172641 -104.936184 FEE 0 0 0 true <_x0032_7_approved>false I false 0 0 Unknown 0 0 false true true false false 0 2014-06-10T11:59:48.14-06:00 400624097 Based on the analytical results and excavation work that was completed, PDC is requesting a No Further Action determination from the COGCC. 400624097 400624097 FORM 19 SUBMITTED 400624097.pdf 400624097 400624379 SITE MAP Coors Fee F19 Site Figures.pdf 1679342 400624097 400624380 ANALYTICAL RESULTS Coors Fee F19 Analytical Table and Report.pdf 952866 400624097 1 2014-06-10T00:00:00-06:00 1 0 true false false false false false 7 false Following the discovery of a historical release during the removal of a produced water vault, soil impacts were removed through excavation activities conducted between March 13 and March 17, 2014. The vertical and lateral extents of the excavation were determined in the field using a photoionization detector (PID) to measure volatile organic compound (VOC) concentrations in soil. On March 14, 2014, five soil samples were collected from the walls of the excavation at 14 feet below ground surface (feet bgs), and three soil samples were collected from the floor of the excavation at 18 to 19 feet bgs. Elevated PID readings were recorded in soil samples collected from the south and west walls at 5 feet bgs, and as a result the excavation was benched to the west and additional soil was removed to 7 feet bgs. Additional shallow soil could not be removed to the south, due to the presence of a DCP sales line, and a test pit was dug to the south of this line, to ensure that shallow soil impacts do not extend further in this direction. On March 17, 2014, five soil samples were collected from the walls of the excavation at 5 feet bgs, one soil sample was collected from the benched floor in the western portion of the excavation at 7 feet bgs, and one soil sample was collected from the test pit, south of the DCP line. Soil samples were submitted to Summit Scientific Laboratories in Golden, Colorado for laboratory analysis of benzene, toluene, ethylbenzene, and total xylenes (BTEX), total petroleum hydrocarbons (TPH)-gasoline range organics (GRO), and naphthalene by EPA Method 8260B. Samples were also submitted for analysis of TPH-diesel range organics (DRO) by EPA Method 8015. Analytical results indicate constituent concentrations are below COGCC Table 910-1 soil standards in all fifteen sample locations collected from the deep and shallow excavation areas. The extent of the excavation and soil sample locations are illustrated on Figure 2. aquolls and aquents, gravelly substratum 9 1 575 170 795 0 0 0 0 0 0 0 0 false false 0 0 false false true false false false false false true true false true 42 28 400624097 1 2014-06-10T00:00:00-06:00 false false true false the produced water vessel failed, causing a produced water spill the produced water vessel was removed 100 true false false 0 0 Thread was being aborted.