70 Wilson Environmental/ Inc. March 16, 2012 Mr. Thomas World Air, LLC Cyril E King International Airport St. Thomas, USVI 00801 - 1194A-$ 41O, 47 1 Re: Secondary Containment System Design and SPCC Plan, Cyril E. htincfntemational Airport, St. Thomas, US Virgin Islands 4/367n- Dear MI. Wilson Environmental Management, Inc. ("WEMI") is pleased to provide Thomas World Air, LLC (TWA) with this scope of work and cost proposal for assisting TWA in complying with federal oil storage regulations at the Cyril E. King International Airport ("airport". This letter presents a description of the work, based on your request. The work is broken down by task, and the costs associated with each task are provided. Scope of Work Task 1 — Secondary Containment System Permit-Level Engineering Plan and Construction Cost Estimate This task consisted of preparing an engineering drawing of the secondary containment pad and revising an existing construction cost estimate for Port Authority permitting. The plan and cost estimate were sealed by a licensed USVI engineer. WEMI completed this task on November 18, 2011. Task 1 Cost (already completed): $400 Task 2 — Secondary Containment System Design WEMI will design a reinforced concrete secondary containment system for a fuel tank truck and a 6,000-gallon tank used for fuel or oil storage. This task will consist of the following: • Design a reinforced concrete containment system consisting of a slab on grade with walls approximately 3 feet high on three sides and a mountable curb at the access end of the slab. • Prepare engineer-sealed drawings and written specifications for construction of the containment system. The containment system design will be prepared by Brock Langley, a USVI-licensed civil/environmental engineer. The design will be based on the permit-level plans WEMI prepared for TWA under Task 1 in November 2011, and calculations for slab thickness and Page 1 EFTA01221359