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All inqui• ..es concerning this plan should be brought to the <br />attentioT, of: <br />T. G. Spargo (612-330-6220) <br />Superintendent, Substation Operations <br />Electric )ist.ribution Standards & Eng. Dept. <br />100 Washington Square - 14th Floor <br />Minneapolis <br />Possibility of Future Oil Discharges <br />Future oil discharges could be the result of five possibili- <br />ties: equipment. failure, personnel error, transportation, <br />vandalism, and sabotage. <br />A. Equipment Failure <br />A loss of oil (in excess of <br />associated with the failure <br />cal equipment. Structur-' <br />f ined to thu =op of such <br />mechanical relief device. <br />structural weak point of n <br />the cover and side wall. <br />cases, virtually all of the <br />equipment. <br />B. Personnel Error <br />five gallons) is seldom <br />Df oil -filled electri- <br />damage is usually con- <br />:pment, near bushings, <br />.cess holes, and the <br />tank - the meeting of. <br />Consequently, in most <br />oil has remained in the <br />The possibility of oil discharges due :.o human <br />error is remote. The transfer, testing, and <br />sampling of oil is performed by three-man crews <br />supervised by experienced personnel. People are <br />constantly in attendance during oil handling opera- <br />tions. Any discharges will be small and subject to <br />rapid detection and clean-up. <br />C. vandalism <br />There will always be the remote possibility of <br />spill events occurring iron vandalism; absolute <br />protection against vanda:_;s entering a subtation or <br />shooting dt oil -filled electrical equipment is vir- <br />tualli, impossible, Nry rcrr,,-unds its substations <br />wit: :yclone-type se A fences constructed of <br />six feet of fabric x: inches of barbed wire to <br />discourage unauthori: ntry. The facilities that <br />contain the larger oil -filled equipment are usually <br />located ir. in;iabit:..7 areas which should deter van- <br />dals. Most of the _;rge equipment have the a14rm <br />systems indicated under sibstation trouble alarms <br />or, page seven. It is also likely that vandals tend <br />to possess small caliber firearms which are less <br />capable of puncturing electrical equipment. <br />DISK 10/(DPO-B-3)/SPC3 - 3 - <br />