| On October 30, 2014, a historical release was discovered while closing the produced water sump at the Albert Sack Unit 1 production facility. Approximately 240 cubic yards of impacted soil have been removed and transported to the Kerr-McGee land treatment facility in Weld County, Colorado for disposal. Groundwater was encountered in the excavation area at approximately 10 feet below ground surface (bgs). A groundwater sample (GW01) was collected and submitted to Origins Laboratory in Denver, Colorado for analysis of benzene, toluene, ethylbenzene, and total xylenes (BTEX) using USEPA Method 8260B. Analytical results received on October 31, 2014, indicated benzene, toluene, and total xylenes were in exceedance of the applicable COGCC Table 910-1 groundwater standards, causing this release to be state reportable. Groundwater analytical results are summarized in the attached Table 1 and laboratory analytical report. |