<_x0034_00975694>

400975694 19 2016-01-25T16:38:31.64-07:00 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 Sr. HSE Representative 2016-01-25T16:38:31.64-07:00 2016-01-25T16:38:31.627-07:00 444585 in process mfurtaw 2016-01-21T10:33:02.39-07:00 mfurtaw Sam.LaRue@Anadarko.com 0.00000 Sam.LaRue@Anadarko.com mfurtaw mfurtaw 2016-01-25T16:38:25.953-07:00 400972729 400975694 GINTAUTAS, PETER 2016-01-15T00:00:00-07:00 TANK BATTERY WELD NESW 30 3N 67W 6 Y OTHER Sunny, 30 degrees F 0 0 At the HSR-Rademacher 63N67W/30SESW location, an operator discovered a release from an oil bypass line due to a corrosion hole. An unknown volume of oil was released into the subsurface. During excavation activities, groundwater was encountered in the excavation at approximately 4 feet below ground surface. One excavation groundwater sample (GW01) was collected and submitted for laboratory analysis of BTEX. Laboratory analytical results received on January 15, 2016 indicated that benzene exceeded the CGWQS at 87.1 µg/L. Excavation soil and groundwater analytical results will be summarized in a supplemental report. A topographic Site Location Map showing the general location of the release is provided as Figure 1. 400972729 true 2016-01-15T00:00:00-07:00 40.193911 -104.935524 FEE 1 0 0 false <_x0032_7_approved>false S false Tank Battery Pad Unknown 0 0 0 0 false false false false true 0 2016-01-18T09:12:39.423-07:00 The volume of the release is unknown. 400975694 400975694 FORM 19 SUBMITTED 400975694.pdf 400975694 400977016 TOPOGRAPHIC MAP 1 - 014216020_FIG01_SL.pdf 632071 400975694 400977018 ANALYTICAL RESULTS 3 - Tables 1 and 2 - Soil and GW Analytical Results.pdf 19393 400975694 400977019 ANALYTICAL RESULTS 4 - Laboratory Analytical Results.pdf 1708522 400975694 400977021 OTHER 5 - 24 Hour Email Notification.pdf 106338 400975694 400977477 SITE MAP 2 - 014216020_FIG02_EXC_SITE.pdf 597288 400975694 1 SPILL 2016-01-15T00:00:00-07:00 Weld County Roy Rudisill

Notified via Email

400975694 2 SPILL 2016-01-15T00:00:00-07:00 Weld County Troy Swain

Notified via Email

400975694 3 SPILL 2016-01-15T00:00:00-07:00 Weld County Tom Parko

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400975694 4 SPILL 2016-01-15T00:00:00-07:00 Landowner Landowner

Notified via Phone

400975694 1 2016-01-25T00:00:00-07:00 0 0 true true false false false false 4 false On January 14, 2016, four soil samples (N01@3', E01@3’, S01@3’, and W01@3’) were collected from the excavation sidewalls and submitted for laboratory analysis of TPH, BTEX, pH, and EC. Laboratory analytical results indicated the benzene concentration in sidewall soil sample S01@3’ exceeded the COGCC Table 910-1 allowable level for benzene at a concentration of 0.223 mg/kg. Groundwater was encountered in the excavation at an approximate depth of 4 feet below ground surface. One groundwater sample (GW01) was collected from the excavation for BTEX analysis. The benzene concentration in sample GW01 exceeded the CGWQS for benzene at 87.1 µg/L. On January 21, 2016, following the removal of additional soil, five additional confirmation soil samples (E02@3’, E03@3’, S02@3’, W02@3’, and W03@3’) were collected from the excavation sidewalls for laboratory analysis of TPH, BTEX, pH, and EC. Laboratory analytical results indicated that TPH, BTEX, pH, and EC levels were compliant with the COGCC Table 910-1 allowable levels at the extent of the excavation. Approximately 180 cubic yards of impacted soil were excavated and transported to the Front Range Regional Landfill in Erie, Colorado. Approximately 15 barrels of groundwater were pulled from the excavation and transported to a licensed injection facility. Prior to backfilling the excavation, 150 pounds of an activated carbon-based bioremediation product was applied to the groundwater and clean backfill through a series of lifts to ensure distribution through the phreatic and smear zones. The general site layout, excavation dimensions, and soil and groundwater sample locations are depicted on the Excavation Site Map provided as Figure 2. The excavation soil and groundwater sample analytical results are summarized in Tables 1 and 2, respectively. The excavation soil and groundwater laboratory analytical reports are attached. Silty Clay 4 1 2100 430 20 2650 1000 Groundwater monitoring wells will be installed at the site to determine the extent and magnitude of the groundwater impacts and establish points of compliance. 0 0 0 0 0 0 0 0 false false 0 0 true false false false false false false false false false false true 74 33 The volume of the release is unknown. 400975694 1 2016-01-25T00:00:00-07:00 false true false false At the HSR-Rademacher 63N67W/30SESW location, an operator discovered a release from an oil bypass line due to a corrosion hole. An unknown volume of oil was released into the subsurface. The bypass line will be replaced. 180 true false false 15 0 Thread was being aborted.