bases around the world. The total volume of the stockpile located at the OSRL bases is calculated to provide members with the ability to respond to a major spill incident. Mauritania and Senegal (Operated and Non-operated) Kosmos maintains Oil Spill Contingency Plans (‘‘OSCP’’) to support our drilling operations in countries where we operate. The plans are based on the principle of ‘‘Tiered Response’’ to oil spills (‘‘Guide to Tiered Response and Preparedness’’, IPIECA Report Series, Volume 14, 2007). A Tier 1 spill is defined as a small-scale operational incident which can be addressed with resources that are immediately available to us. A Tier 2 spill is a larger incident which would need to be addressed with regionally based shared resources. A Tier 3 spill is a large incident which would require assistance from national or world-wide spill co-operatives. Under OSCPs, emergency response teams may be activated to respond to oil spill incidents. The OSCPs call for Tier 1 spill equipment at our shorebases in Nouakchott, Mauritania and Dakar, Senegal to respond to a harbor or shoreline incident in the area. We also maintain dispersant spraying capabilities in the field to respond to an offshore incident. We have access to additional Tier 2 and Tier 3 equipment from OSRL’s Southampton, UK location. Suriname Kosmos intends to conduct drilling operations in Suriname in 2018. An OSCP has been completed per the previously mentioned ‘‘Guide to Tiered Response and Preparedness’’. Kosmos plans to maintain it’s dispersant spraying capabilities in the field. We expect to have access to additional Tier 2 and Tier 3 equipment from OSRL’s Americas base in Ft Lauderdale, FL. Ghana (Non-operated) Tullow, our partner and the operator of the Jubilee Unit and the TEN fields, maintains an OSCP covering the Jubilee Field and Deepwater Tano Block. Under the OSCPs, emergency response teams may be activated to respond to oil spill incidents. Tullow has access to OSRL’s oil spill response services comprising technical expertise and assistance, including access to response equipment and dispersant spraying systems. Tullow maintains lease agreements with OSRL for Tier 1 and Tier 2 packages of oil spill response equipment. Tier 1 equipment, which is stored in ‘‘ready to go trailers’’ for effective mobilization and deployment, includes booms and ancillaries, recovery systems, pumps and delivery systems, oil storage containers, personal protection equipment, sorbent materials, hand tools, containers and first aid equipment. Tier 2 equipment consists of larger boom and oil recovery systems, pump and delivery systems and auxiliary equipment such as generators and lighting sets, and is also containerized and pre-packed in trailers and ready for mobilization. Tullow has additional response capability to handle an offshore Tier 1 response. Further, our membership in the West and Central Africa Aerial Surveillance and Dispersant Spraying Service (‘‘WACAF’’) gives us access to aircraft for surveillance and spraying of dispersant, which is administered by OSRL for a Tier 2 offshore response. The aircraft is based at the Kotoka International Airport in Accra, Ghana with a contractual response time, loaded with dispersant, of six hours. Additional stockpiles of dispersant are maintained in Takoradi, Ghana. Although the above arrangement is in place, we can make no assurance that these resources will be available or respond in a timely manner as intended, perform as designed or be able to fully contain or cap any oil spill, blow-out or uncontrolled flow of hydrocarbons. While a Tier 3 incident is not expected in Ghana, in the case of a Tier 3 incident, Tullow would engage the services of OSRL. Per common industry practice, under agreements governing the terms of use of the drilling rigs contracted by us or our block partners, the drilling rig contractors indemnify us and our block partners in respect of pollution and environmental damage originating above the surface of the water and from such drilling rig contractor’s property, including their drilling rig and other related equipment. 39