| On March 4, 2016, an operator discovered stained surface soil adjacent to the production tank inside the secondary containment at the Frank-65N67W/5SENW production facility. During excavation activities, groundwater was encountered in the excavation area at approximately 9 feet below ground surface (bgs). A groundwater sample (GW01) was collected on Friday March 4, 2016 and submitted to Origins Laboratory in Denver, Colorado for analysis of benzene, toluene, ethylbenzene, and total xylenes (BTEX) by USEPA Method 8260C. Analytical results received on Monday March 7, 2016, indicated that the benzene concentration in groundwater sample GW01 was above the applicable COGCC Table 910-1 groundwater standard. Laboratory analytical results are summarized in Table 2 and the groundwater sample location is illustrated on Figure 2. |