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section __ Safety <br /> bulletin 3 <br /> date 211291 <br /> page 6 of 6 <br /> 11. Final. Exit <br /> Remove all equipment. Double check to ensure that all caps used to <br /> plug pipes are removed. Sign Entry Permit and include with the field <br /> trip report documents. <br /> I <br /> Procedure for Exte%ma <br /> If the repair work involves cutting into a tank or grinding adjacent to a <br /> crack or split that extends through the shell wall, prior to any work the <br /> tank must be ventilated such that the vapor level is less than IOX LEL <br /> initially and remains lower than 20% of the LEL during work. Tanks that <br /> have been in service are to be continuously monitored to ensure these <br /> conditions are met. <br /> The above requirements must be met for field installation of fittings . <br /> a;saf3 <br />