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2 CSI proposed to enter the tank and repair/remanufacture the primary tank inner wall as follows: 1. The repair procedure would start by drilling holes into the annular space to drain any residual fuel and brine that may be there and remove fluids with a vacuum truck to be provided by the contractor or customer. 2. Grind/sandblast 100% of the tank inner wall (shells and end caps) for secondary bonding. Clean all grit and debris from the tank interior. 3. Apply over the cracks a 7 ply Matt (M)/Woven Roving (WR)/MNVR/M/WR/M Iayup 20 inch wide and centered over identified cracks, extending 360 degrees in the hoop direction. 4. Following crack repairs, apply over the entire inner tank wall (shells and end caps) a 7 ply MNVR/MNVR/MNVR/M full coverage repair Iayup. This procedure will result in achieving a minimum repair thickness throughout the primary tank of 0.250 inch with a nominal thickness of 0.267 inch. Allow repairs to fully cure before leak testing. 5. Apply 3 psig air test to the annular space. Soap the entire primary tank surface and all exposed areas on the secondary tank. Inspect the inner wall and exposed areas of secondary for leaks. Hold the pressure for one hour without losing pressure. 6. Fill the tank annular space with brine solution. 7. Enter the tank and inspect the interior for any brine leaks. 8. Inform the contractor or tank owner that the tank is ready for installation of the reservoir float sensors and vent the annular space for continuous monitoring. Note: All materials used in the repairs will be the same UL approved materials used for current CSI tank manufacturing to build ethanol compatible UL 1316 listed tanks and will be covered by the Biofuel Tank Upgrade limited warranty of 10 years. The UST will be compatible with all ethanol blends up to 100%, biodiesels per ASTM D6751 and Ultra Low Sulfur Diesel fuels. The entire tank inner surface is being overlaid in Step 4 as a precaution against there being any non-visible micro-cracks or blemishes. At the completion of the repairs, the tank inner wall will be twice as thick as its original design and the final repaired tank will exceed the original UL listed tank construction requirements. It is my professional opinion that CSI has proposed an acceptable plan for the subject UST such that the final repaired UST will meet or exceed the original UL 1316 construction requirements. Please feel free to contact me if you have any questions or need additional information.