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DOCKETS UNIT <br />PAGE SIXTEEN <br />MARCH 24, 1987 <br />Response: <br />It would be reasonable to expect that except in cases <br />involving a major catastrophe, accidents and the <br />consequences thereof would be completely elimnated on <br />pipelines using this technology. <br />12. Proposals: <br />Require operators to improve ability to rapidly locate and <br />isolate leaks through remote -controlled valves, (spaced <br />according to population) remotely monitored gauges, and <br />meters at pump stations, and more specific emergency <br />procedures. (Minn. Rep., Rec. 4.4) <br />Establish release (Leak) detection standards for hazardous <br />pipelines (S2780) <br />Response: <br />In the case of the Mounds View incident, had WPL been able to <br />isolate and locate the leak, the severity of the accident <br />could have been mitigated significantly. Instead, the <br />rupture leaked gasoline for approximately 25 minutes before <br />the explosion and fire was first reported and continued to <br />leak fuel for an additional hour and fifteen minutes before <br />a manual valve was closed and product stopped flowing putting <br />out the fire. Until the fire was reported, WPL had no idea <br />where the rupture might have occurred along the 165 mile <br />route of the pipeline. <br />Any measures undertaken to reduce the time needed to locate <br />and isolate leaks will reduce the risk of injury(ies), <br />death(s), or environmental damage. <br />puestions: <br />(a) What technology is commercially available that would <br />enable prompt leak detection so that corrective <br />action could be taken in populated areas before deaths, <br />injuries or substantial property damages would be <br />likely to occur? <br />Response: <br />The City is aware that various technological advances <br />have occurred in this area but is unaware of the details <br />or cost of implementation. <br />(b) What are the costs of implementation? <br />