On October 27, 2014, a historical release was discovered while replacing the tank battery at the Coughlin Red VV 22-1, 22-2 production facility. Approximately 200 cubic yards of impacted material were removed and transported to Front Range Regional Landfill in Erie, Colorado. Groundwater was encountered in the excavation 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 27, 2014, indicated benzene concentrations were in exceedance of the applicable COGCC Table 910-1 groundwater standards, causing this release to be reportable to the State. Groundwater analytical results are summarized in the attached Table 1 and laboratory analytical report. |