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accomplished by beginning at the entry hole A8.5 All depleted absorbent residuals shall be <br /> drying wet or moist areas as tank entry removed from the tank and placed in approved <br /> personnel work to each end of the tank. Any containers, sealed, and labeled as required. <br /> remaining liquid that is present shall be Disposal of the containers and contents shall be <br /> absorbed prior to being walked through. If the in accordance with all local, state, and federal <br /> absorbent appears wet, new absorbent should regulations. <br /> be added to maintain a dry appearance. Vapor <br /> readings shall be taken within the tank during <br /> the spreading of the absorbent. All liquid on the A8.6 The tank shall not be considered totally <br /> tank bottom shall be absorbed, and clean dry clean until the tank has been repaired and <br /> absorbent shall be placed on top of any abrasive blasted to white metal. Until the tank <br /> absorbent that has a wet appearance. has been abrasive blasted to white metal, liquids <br /> which enter the tank or residuals within the tank <br /> may form flammable vapors if adequate <br /> ventilation is not maintained. <br /> A8.3 Cleaning shall initially begin under the <br /> access opening and be accomplished by mixing <br /> the absorbent and residuals using an aluminum A9.0 FINAL CLEANING AND SURFACE <br /> or brass shovel. The mixed absorbent and PREPARATION <br /> residuals shall be placed into buckets for <br /> removal from the tank. The area directly under A9.1 STEEL TANK ABRASIVE <br /> the access opening shall be clean of absorbent CLEANING PRECAUTIONS. <br /> and residuals prior to proceeding with any <br /> further cleaning. After the area directly under 9.1.1 All abrasive blasting personnel shall be <br /> the access opening is clean, tank entry familiar with the hazards described in API <br /> personnel shall mix and remove the absorbent Publication 2027, "Ignition Hazards Involved in <br /> and residuals as the they work to each end of Abrasive Blasting of Tanks in Service". <br /> the tank. During mixing, if liquid is present,new <br /> absorbent shall be added. Vapor readings shall <br /> be taken within the tank during the mixing of A9.2 REPAIRS PRIOR TO ABRASIVE <br /> absorbent and tank residuals. After thoroughly BLAST OPERATIONS <br /> mixing any residuals into the absorbent, an <br /> aluminum or brass shovel shall be used to place <br /> the depleted absorbent into buckets for removal A9.2.1 Repairs shall be performed prior to or <br /> from the tank. during abrasive blast operations when liquid is <br /> entering the tank. <br /> A9.3 ABRASIVE CLEANING <br /> OPERATIONS <br /> A8.4 Upon removal of the mixed absorbent and <br /> tank residuals from the tank, any visual liquid A9.3.1 Before entry to perform abrasive <br /> or moisture on the tank interior shall require the blasting, the tank shall be checked again with <br /> application of additional absorbent. the combustible gas indicator to ensure that no <br /> flammable vapors have accumulated in the tank. <br /> Ventilation must continue to ensure that any <br /> 16 <br />