<_x0034_00679246>

400679246 19 2014-09-05T15:01:59.03-06:00 47120 KERR MCGEE OIL & GAS ONSHORE LP

P O BOX 173779

DENVER CO 80217-3779 Phil Hamlin 970 336-3500 970 515-1161 Phil Hamlin Senior HSE Representative 2014-09-05T15:01:59.03-06:00 2014-09-05T15:01:59.017-06:00 438733 in process JBARKER 2014-09-04T10:22:14.97-06:00 JBARKER phil.hamlin@anadarko.com 0.00000 phil.hamlin@anadarko.com JBARKER JBARKER 2014-09-05T15:01:56.843-06:00 400676395 400679246 CHESSON, BOB 2014-08-26T00:00:00-06:00 TANK BATTERY WELD NENW 15 3N 66W 6 Y CROP LAND Clear, 80 degrees 0 0 On August 25, 2014, a historical release was discovered during tank battery decommissioning activities at the UPRC 15-6K, 15-3K site. There were no indications that the dump lines, water tank, or fittings were leaking, and the volume of the release is unknown. The tanks and associated lines were cleaned in preparation for decommissioning. A groundwater sample was collected and analyzed for benzene, toluene, ethylbenzene, and xylenes (BTEX). Laboratory analytical results, received on August 26, 2014, indicated benzene concentrations above the COGCC Table 910-1 standards, making this release reportable. Groundwater analytical results are presented on the attached table and laboratory analytical report. 328075 400676395 false 2014-08-26T00:00:00-06:00 40.231925 -104.764351 FEE 1 0 0 false <_x0032_7_approved>false S false 0 >=1 and <5 >=1 and <5 0 0 false false false true false 0 2014-08-29T11:34:34.627-06:00 400679246 400679246 FORM 19 SUBMITTED 400679246.pdf 400679246 400679406 TOPOGRAPHIC MAP UPRC 15-6K, 15-3K Figure 1.pdf 161270 400679246 400679412 FORM 19 SUBMITTED Spill Notification.pdf 58894 400679246 400679853 ANALYTICAL RESULTS Analytical Results - Table and Laboratory Results.pdf 589441 400679246 400680639 SITE MAP UPRC 15-6k & 3k_Figure 2 - Sample Location Map.pdf 105558 400679246 1 SPILL 2014-08-26T00:00:00-06:00 County Roy Rudisill

email 400679246 2 SPILL 2014-08-26T00:00:00-06:00 County Tom Parko

email 400679246 1 2014-09-04T00:00:00-06:00 0 0 true true false false false false 4 false On August 25, 2014, a historical release was discovered below the produced water sump at the UPRC 15-6K, 15-3K production facility. Approximately 100 cubic yards of impacted soil were excavated and transported to Buffalo Ridge Landfill in Keenesburg, Colorado for disposal. The lateral and vertical extent of the excavation was determined in the field by using a photoionization detector (PID) to measure volatile organic compound (VOC) concentrations in soil. Four soil samples were collected from the sidewalls of the final extent of the excavation at approximately 1 foot below ground surface (bgs). Soil samples were submitted to eAnalytics Laboratory in Loveland, Colorado for analysis of BTEX and TPH. Analytical results indicated constituent concentrations were below the applicable COGCC Table 910-1 standards in the four soil sample locations. Groundwater was encountered during excavation activities at approximately 2 feet bgs. A groundwater sample (GW01) was collected on August 25, 2014, and submitted for laboratory analysis of BTEX. Laboratory results indicated benzene concentrations were in exceedance of applicable regulatory standards. Approximately 320 barrels of groundwater were subsequently removed using a vacuum truck and transported to a licensed injection facility for disposal. On August 28, 2014, a second groundwater sample (GW02) was collected and submitted for laboratory analysis of BTEX. Analytical results indicated BTEX concentrations were in exceedance with applicable regulatory standards. Prior to back-filling the excavation, 200 pounds of activated carbon were introduced into the excavation area. Soil and groundwater analytical results are summarized in Table 1 and Table 2, respectively. Silty sand to silty clay. 2 11 1315 1975 1750 2500 0 0 0 0 0 0 false false 0 0 false true true false false false false false true false false true 25 20 0 400679246 1 2014-09-04T00:00:00-06:00 false false true false The release is historical. There was no indications that the dump lines, water tank, or fittings were leaking. All associated fittings were tight and working properly. Consequently, the volume and cause of the release is unknown. The tank battery will be rebuilt in a new location with a geosynthetic liner, poly drain lines, and a double walled fiberglass produced water tank. 100 true false false 320 0 Thread was being aborted.