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<br /> 2 <br />(1) Three major railway lines, the elevated BART line, three major <br />freeways and a natural creek, divide the City into numerous <br />sections, and equipment responding to emergencies face potential <br />delays and obstruction of access in crossing these barriers. <br /> <br />(2) San Leandro lies in the path of two major water reservoirs which, <br />upon failure, would inundate a large portion of the City, further <br />delaying the response to a fire or other emergency. <br /> <br />(3) A growing community of single-family and multi-family dwellings <br />presently exists on the easterly side of Highway 580, which is itself <br />a potential physical barrier impeding response to a fire or other <br />emergency. <br /> <br />(4) The two major north-south emergency response routes aside from the <br />freeways are dependent upon bridges spanning San Leandro Creek. <br />Failure of these bridges would isolate a heavily populated section of <br />the City north of the creek. <br /> <br />In the event of fire, toxic gases and acids emitted by plastic pipe and <br />the smoke generated by plastic pipe, represent an increased life <br />hazard and since most loss of life in fires is from asphyxiation, a <br />rapid response by emergency equipment becomes more critical. <br /> <br />(c) All drain and waste pipes flow into the San Leandro Sewage Treatment <br />Plant. Any chemical reaction between plastic pipe and the waste flowing <br />through it, may produce contaminants, threatening the biological process <br />of the Treatment Plant itself and in turn thereby threatening the marine life <br />in the San Francisco Bay. <br /> <br />(d) A large area of potential residential development in the westerly portion of <br />the City, adjacent to the Bay, is potentially subject to liquefaction which <br />may cause a loss of lateral support for plastic pipe, resulting in its failure. <br />Liquefaction also often results in a greater degree and different form of <br />differential movement than occurs elsewhere, which may cause excessive <br />strain on plastic pipe. <br /> <br />(e) High wind conditions normally exist in the hillside and shoreline areas of <br />the City, increasing the potential for fire spread. The presence of plastic <br />pipe increases the life hazard. <br />