| On July 26, 2017, historical impacts were discovered during P&A activities beneath the produced water sump at the Magness Federal 4-6A production facility. Groundwater was encountered within the excavation at approximately 4 feet below ground surface (bgs). A groundwater sample (GW01) was collected and submitted to Origins Laboratory for analysis of benzene, toluene, ethylbenzene, and total xylenes (BTEX) by USEPA Method 8260C. Analytical results received on July 27, 2017, indicated that the benzene and total xylenes concentrations in groundwater sample GW01 were above the applicable COGCC Table 910-1 standards. A topographic Site Location Map showing the geographic setting of the release is provided as Figure 1. |