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Secondary Containment Diagram — Frank C. Alegre Trucking, Inc. <br /> 1. The tanker truck connects the transfer hose from the truck to the fueling port. Figure 1 <br /> 2. The lever on the fueling port is placed in the opened position after the connections are secure. <br /> 3. The tanker truck activates the pump on the truck and fuel begins flowing from the tanker truck to the fueling port. <br /> 4. At the fueling port the fuel flows through the receiving lines to the downspout on the top of Tank#1 and Tank#2 (simultaneously). <br /> Note: Both tanks are filled up at the same time. The fuel drops into each tank from the top to the bottom. The fuel meters on the top <br /> of each tank are visually checked to ensure the tanks are not overfilled. <br /> 5. After the tanks are filled to the desired level,the pump on the tanker truck is turned off and the lever is placed in the closed position (at <br /> the fueling port). <br /> 6. The transfer hose on the tanker truck is disconnected from the fueling port. <br /> 7. The excess diesel fuel in the transfer hose (line fill) is pumped back into the tanker truck. <br /> The two 10,000 gallon diesel tanks sitting in the secondary containment area are connected together by two pipes. One pipe sits on the top of <br /> each tank and is designed (we believe) to equalize the pressure between the two tanks during the refueling process. <br /> The second mutually shared pipe is one that is used for fueling both tanks (at the same time)from the fueling port. Once the valve on the <br /> fueling port is closed, any fuel left in the receiving lines remains there as line fill. If the line was to break, all of the line fill from Line#1 and Line <br /> #2 would spill into the containment area. None of the fuel in either tank would drain out. If the equalizing pipe on the top of each tank broke, <br /> no spillage would occur since no fuel ever reaches that height. Although the pipe connects each tank to the other, no fuel ever crosses over to <br /> the other tank. <br /> If one tank was punctured and all of its contents spilled into the secondary containment area,the fuel in the other tank will remain intact(will <br /> not empty) and at a constant level. <br /> Notice how the fueling lines are plumbed. During the refueling process the fuel is loaded from the top and falls directly into the respective tanks; <br /> all connected piping is located on the top of each tank. <br /> Page 1 of 10 <br />