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FEB 05 '99 14:43 FR CONTAINMENT SOLUTIONS814 542 5020 TO 9-15108958426 P.10i20 section Safamc bulletin 3 date —„2/l/91 page 33 of 6-- The safety observer is not to enter the tank for rescue if the man can gat out himself. If physical rescue is required, the safety observer is to: A. Surmon the backup man (sound air horn if necessary) . DO NOT ENTER the tank without back-up present. B. Attempt to pull the technician toward the entry hole by means of the lifeline. _C.. Attach lifeline to safety harness. D. Put on the SCBA and test operation. E. Enter the tank and assist in the rescue and removal of the man, after the stand-by person is present at the tank entry hole. 2. Remove All Possible ZXgAuct Use a hand pump or approved flammable fluid pump to remove as much product as possible. No more than 1” of product should be in the tank prior to ventilation. Remove submersible pump if it is accessible. 3. Start Ventilation Connect an approved air mover to exhaust air from the fill pipe or other pipe or hose within 12" of tank bottom. The air mover must be grounded when in use. Extend exit point of exhaust at least 61 above grade. Continue to ventilate until test with the combustible gas meter indicates the LEL is less than 10% within 12" of tank bottom. Remove fill pipe to check. This can take between 2 and 24 hours depending on the amount of product left in the tank. If tank lines are manifolded, the line to the tank to be entered might have to be broken and blanked off to isolate the tank and allow defuming of the tank. 4. Cut Entry Hole Cut entry hole only after tests confirm the vapor level within 12" of the tank bottom is less than 20% of the LEL. Use only an air powered saw. The minimum hole size to facilitate rescue if required is ( 24" x 24".