<_x0034_00890327>

400890327 19 2015-08-28T14:57:44.907-06:00 47120 KERR MCGEE OIL & GAS ONSHORE LP

P O BOX 173779

DENVER CO 80217-3779 Phillip Hamlin 970 336-3500 970 515-1161 Phillip Hamlin Sr. HSE Representative 2015-08-28T14:57:44.907-06:00 2015-08-28T14:57:44.89-06:00 in process mfurtaw 2015-08-26T10:07:14.563-06:00 mfurtaw Phil.Hamlin@Anadarko.com 0.00000 Phil.Hamlin@Anadarko.com mfurtaw mfurtaw 2015-08-28T14:57:43.25-06:00 400890327 400890327 2015-08-26T00:00:00-06:00 TANK BATTERY WELD NWNW 19 3N 67W 6 Y OTHER Sunny, 80 degrees F 0 0 While deconstructing the HSR-Sekich-63N67W/19SWNW location, soil with historical petroleum hydrocarbon impacts was encountered beneath the production tanks. During excavation activities of the impacted soil, groundwater was encountered in the excavation at approximately 7.5 feet below ground surface. One groundwater sample (GW01) was submitted for laboratory analysis of BTEX. Laboratory analytical results received on August 26, 2015 indicated that benzene and total xylenes concentrations exceeded the CGWQS. The excavation soil and groundwater sample analytical results are summarized in the supplemental Spill/Release Detail Report. A topographic Site Location Map showing the general location of the release is attached as Figure 1. 336145 400890327 false 2015-08-26T00:00:00-06:00 40.215889 -104.938253 FEE 1 0 0 false <_x0032_7_approved>false I false Tank Battery Unknown 0 Unknown 0 0 false true false true false 0 2015-08-26T10:07:14.843-06:00 Historical Release - Volume of the release is unknown. 400890327 400890327 FORM 19 SUBMITTED 400890327.pdf 400890327 400890687 ANALYTICAL RESULTS Tables 1 and 2 - Analytical Results.pdf 153489 400890327 400890688 ANALYTICAL RESULTS Laboratory Analytical Results.pdf 1717452 400890327 400890842 OTHER 24 Hour Email Notification.pdf 106181 400890327 400890845 TOPOGRAPHIC MAP 014215158_FIG01_SL.pdf 1038382 400890327 400892147 SITE MAP 014215158_FIG02_EXC_SITE.pdf 359138 400890327 1 SPILL 2015-08-26T00:00:00-06:00 Weld County Roy Rudisill

Email 400890327 2 SPILL 2015-08-26T00:00:00-06:00 Weld County Troy Swain

Email 400890327 3 SPILL 2015-08-26T00:00:00-06:00 Landowner Landowner

Phone 400890327 1 2015-08-28T00:00:00-06:00 0 0 true true false false false false 8 false On August 24, 2015, five confirmation sidewall soil samples (N01@6.5', E01@6.5', S01@6.5', W01@6.5’, and W02@6.5’) were collected from the excavation and submitted for laboratory analysis of TPH, BTEX, pH, and EC. Laboratory results indicated that excavation sidewall sample S01@6.5’ exceeded the COGCC Table 910-1 allowable level for TPH at a concentration of 1,250 mg/kg. On August 25, 2015, following the removal of additional soil, two additional soil samples (E02@6.5’ and S02@6.5’) were collected from the eastern and southern sidewalls and submitted for laboratory analysis of TPH, BTEX, pH, and EC. One groundwater sample (GW01) was submitted for laboratory analysis of BTEX. Laboratory analytical results for the excavation sidewall soil samples indicated that TPH, BTEX, pH, and EC levels/concentrations were in compliance with COGCC Table 910-1 allowable levels at the extent of the excavation. Laboratory analytical results for groundwater sample GW01 indicated that benzene and total xylenes concentrations exceeded the CGWQS at concentrations of 45.7 µg/L and 3,090 µg/L, respectively. Approximately 270 cubic yards of soil were excavated and transported to the Kerr-McGee land treatment facility in Weld County, Colorado. Prior to backfilling the excavation, 150 pounds of COGAC®, a carbon-based groundwater remediation product, was applied to the groundwater in the excavation. The general site layout, excavation dimensions, and confirmation soil and groundwater sample locations are shown on the Excavation Site Map attached as Figure 2. The analytical results for the excavation soil and groundwater confirmation samples are summarized in Tables 1 and 2, respectively. The laboratory analytical reports are attached. Clay, Sandy Clays, and Sandy Loam. 7 3 570 1680 3780 1180 850 Groundwater monitoring wells will be installed at the site to determine the extent and magnitude of the groundwater impacts. Additional details will be provided in a Form 27. 0 0 0 0 0 0 false false 0 0 true false true false false false false false false false false true 36 30 6 400890327 1 2015-08-28T00:00:00-06:00 false false true false While deconstructing the HSR-Sekich-63N67W/19SWNW location, soil with historical petroleum hydrocarbon impacts was encountered beneath the production tanks. During excavation activities of the impacted soil, groundwater was encountered in the excavation at approximately 7.5 feet below ground surface. The site will be deconstructed and returned to pre-release grade. 270 true false false 0 0 Thread was being aborted.