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the vent pipe had not been reinstalled at that time. Instead, as noted above, the vent pipe <br /> had been replaced with a pressure relief cap on the top of the day tank. The actual <br /> configuration of the genset and associated tanks following installation on the Franklin pad <br /> is depicted in Figure 1D. (The vent pipe was not reinstalled until October 161n,after the <br /> spill event on October 1 1 cn ) <br /> On September 251n, Rapid Energy, CSQ's electrical contractor, installed and <br /> commissioned a new overnight genset located on the upper Franklin pad. The overnight <br /> generator is utilized to maintain heat in the main generator trailer and block heaters to <br /> allow for easier starting each morning. The overnight genset was wired into the primary <br /> power genset to provide power to the shipping container when the main generator was not <br /> operating. This configuration did not match the previous wiring arrangement at the initial <br /> 2014 installation location. The overnight genset and primary power genset operated <br /> without incident for —15 days prior to the spill event. <br /> On Friday, October 11, 2019, for unknown reasons, the power switch on the overnight <br /> genset was switched from the 480V position to the 240V position (Figure 3). The Eaton <br /> transfer system and the Caterpillar transfer switch on the day tank requires a single phase <br /> from a 480V supply to operate. The lower voltage (240V) may have caused or contributed <br /> to the system not functioning correctly, and as a result, the day tank filled to over capacity <br /> during the night. Due to the fact that the vent pipe had not been reinstalled and had been <br /> replaced by a pressure release cap on the top of the day tank, diesel flowed out of the <br /> pressure release cap and spilled into the generator trailer and ultimately onto the road fill <br /> beneath it (Figure 1 D and Figure 4). <br /> 8 <br />