CONCRETE BASIN SURFACE AREA AND MATERIAL REQUIREMENTS SIDE LENGTH A B C Reset TOTAL SURFACE AREA Open Basin Closed Basin Total Surface Area of YELLOW - Fill in yellow cells with corresponding length of lettered side. PRODUCT REQUIREMENTS Open Basin Closed Basin EP-990C / 3 gallon kits Gallons of 5000FR Rolls of 6" Seam Fabric Gallons of TOWER-GUARD