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Commissioner Blank stated that the pipe could hold either unleaded car gas, which is easily combusted, or jet-A, which is not easy to combust but difficult to put out once combusted. Deputy Fire Chief Rodondi stated that the pipelines are designed in such a way so one pipeline will run multiple types of fuel depending on the need. He added that a “pig” is run in between the batch of the fuel and pushes tens of thousands of gallons of fuel at a time. He noted that there could be a mix of fuels in the pipeline at any one time from the refinery to the distribution point. Commissioner Blank inquired what other fuel comes out of the refinery. Deputy Fire Chief Rodondi stated that he was not aware of what the line is primarily used for but that the terminal it goes to may not be a jet fuel terminal. He indicated, as an example, that when he worked across the Bay, there were three pipelines across the Bay from the Martinez Refineries to the Brisbane Terminal, with one of the lines running jet fuel for the San Francisco International Airport. Commissioner Blank inquired if staff knows how deep down the pipes are and the dates they were installed. Deputy Fire Chief Rodondi replied that he did not know and that it would take more research to find the answers to those questions. Commissioner O’Connor inquired which pipeline runs through the Downtown along the railroad corridor underneath the Downtown parking area currently being installed. Deputy Fire Chief Rodondi replied that he did not know. He further clarified that the corridor referred to is actually the I-680 corridor and not the I-580 corridor and that natural gas runs in Line 131; the pipe that goes over Pigeon Pass and comes within 150 feet of East Ruby Hill Boulevard. Commissioner Pentin inquired if there were cut-off’s at a control station for these or were they manual in the sense that someone must physically crank down the natural gas. Deputy Fire Chief Rodondi replied that he could not speak about the valving components on the pipelines, but it would be a good question for PG&E. Fire Chief Miguel stated that with the new installations, PG&E has control centers that have the ability to control major flows. He indicated that he did not know whether the situation in San Bruno was under that control or not. He noted that there are thousands and thousands of feet of natural gas lines that run under virtually every community. He stated that he believes the San Bruno occurrence is an isolated incident and that when the autopsy on the pipe and entire incident is completed, there will be an extenuating PLANNING COMMISSION MINUTES, September 15, 2010 Page 4 of 23