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400946791 19 2015-12-04T09:23:32.937-07:00 47120 KERR MCGEE OIL & GAS ONSHORE LP

P O BOX 173779

DENVER CO 80217-3779 Sam LaRue 970 336-3500 970 515-1238 Sam LaRue Senior HSE Representative 2015-12-04T09:23:32.937-07:00 2015-12-04T09:23:32.923-07:00 444118 in process Cwasko 2015-12-03T09:42:04.937-07:00 Cwasko Sam.LaRue@anadarko.com 0.00000 Sam.LaRue@anadarko.com Cwasko Cwasko 2015-12-04T09:23:30.173-07:00 400943182 400946791 GINTAUTAS, PETER 2015-11-24T00:00:00-07:00 TANK BATTERY WELD NESW 16 2N 65W 6 Y NON-CROP LAND 50's, Sunny 0 0 On November 25, 2015, a faulty dump line connection was encountered during decommissioning activities at the Thomason 6-16 Tank Battery facility. The total volume of released material is unknown. Assessment activities are ongoing and will be described in the forthcoming Supplemental Form 19. 329312 400943182 true 2015-11-24T00:00:00-07:00 40.131823 -104.673185 FEE 0 0 0 true <_x0032_7_approved>false S false 0 Unknown Unknown 0 0 false false false true false 0 2015-11-25T09:36:17.53-07:00 400946791 400946791 FORM 19 SUBMITTED 400946791.pdf 400946791 400946899 TOPOGRAPHIC MAP Thomason 6-16 Figure 1.pdf 996402 400946791 400947611 SITE MAP Figure 2 Thomason 6-16 Site Map.pdf 226968 400946791 400947612 ANALYTICAL RESULTS Soil Analytical Table and Laboratory Reports.pdf 3295080 400946791 1 SPILL 2015-11-25T00:00:00-07:00 County Roy Rudisil

Email 400946791 2 SPILL 2015-11-25T00:00:00-07:00 County Tom Parko

Email 400946791 3 SPILL 2015-11-25T00:00:00-07:00 County Troy Swain

Email 400946791 4 SPILL 2015-11-25T00:00:00-07:00 Landowner

Phone 400946791 1 2015-12-03T00:00:00-07:00 0 0 true false false false false false 20 false On November 25, 2015, a faulty dump line connection was encountered during the closure of the produced water sump at the Thomason 6-16 production facility. Approximately 990 cubic yards of impacted material were excavated and transported to the Kerr-McGee Land Treatment Facility in Weld County, Colorado for disposal. Excavation activities were guided in the field by screening soil for volatile organic compound (VOC) concentrations using a photoionization detector (PID). Ten (10) soil samples were collected from the base and sidewalls of the final extent of the excavation area at approximately 20 feet and 16 feet below ground surface (bgs), respectively. The soil samples were submitted to Origins Laboratory in Denver, Colorado for laboratory analysis of benzene, toluene, ethylbenzene, total xylenes (BTEX), total petroleum hydrocarbons (TPH) - gasoline range organics (GRO) by USEPA Method 8260C, TPH - diesel and oil range organics (DRO and ORO) by USEPA Method 8015, electrical conductivity (EC), and pH. Analytical results indicated that constituent concentrations in soil samples collected from the final extent of the excavation area were below the applicable COGCC Table 910-1 standards. Based on the analytical results, Kerr-McGee is requesting a No Further Action (NFA) determination for this release. The excavation area will be backfilled and re-contoured to match pre-existing conditions. Soil analytical results are summarized in Table 1 and the sample locations are illustrated in Figure 2. Sand to silty clay. 71 19 1150 4595 1375 0 0 0 0 0 0 false false 0 0 false true true false false false false true true false false true 50 32 0 400946791 1 2015-12-03T00:00:00-07:00 false true false false During the decommissioning of the production facility, a faulty dump line connection into the produced water sump was encountered. The production facility will be re-built with poly-lines and a geo-synthetic liner. 990 true false false 0 0 Thread was being aborted.