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Return pipe <br /> Return pipe Vent pipe <br /> 12,000 gal. <br /> Conex BulkTank <br /> 21 <br /> T C- <br /> a <br /> V1 Vent pipe <br /> Generator <br /> LL 12,000 gal. 100 gal. <br /> Bulk Tank Day a Conex <br /> E Tank <br /> E <br /> a <br /> Generator <br /> ---- 100 gal. <br /> _ Day <br /> A-2014 Portal#4 Install Tank <br /> Return pipe Vent pipe B-2019 Portal#4 Install <br /> j[(1 <br /> 70g <br /> pe <br /> T Conex <br /> a <br /> a <br /> Ln a <br /> Conex <br /> a <br /> LLCB <br /> 00 gal. N <br /> -ok Tank Generator a <br /> a 100 gal. LLEDay Generator <br /> Tank 100 gal. <br /> MDay <br /> dTank <br /> C-2019 Franklin Pad Design <br /> D-2019 Franklin Pad Installation <br /> Red lines and arrows denote fuel levels(lines)and pathways(arrows). <br /> Figure 1. Schematic of the general mechanics of the CSQ genset fueling system. The red <br /> line represents fuel level. A. 2014 Portal #4 install. In the event that the 100 gallon day <br /> tank overfills, the pump would return fuel through the return pipe into the bulk tank. B. <br /> 2019 Portal #4 Reinstall following recommissioning. Notice that the genset Conex was <br /> placed beside and much lower than the bulk tank. C. 2019 Franklin Pad design. In the <br /> event that the 100 gallon day tank overfills, the pump would return fuel through the return <br /> pipe into the bulk tank. D. 2019 Franklin Pad installation at the time of the October 11, <br /> 2019 diesel spill. Note that, as more fully described below, the vent pipe inadvertently was <br /> not re-installed after testing and commissioning of the 2019 Portal #4 installation, which <br /> allowed fuel to spill out of the vent tank pressure relief cap opening in the event of an <br /> overfill of the day tank. <br /> In July of 2019, the rebuilt genset shipping Conex was delivered to the site on a flatbed <br /> trailer (float) and parked to the east and at an elevation well below the bulk tank (at <br /> 6 <br />