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VII. TANKS <br />1. Operation. <br />(a) Treatment or storage of hazardous waste in tanks shall comply <br />with Item 7 (b), Part III of this document. <br />(b) Hazardous waste or treatment reagents shall not be placed in <br />a tank if they could cause the tank or its inner liner to <br />rupture, leak, corrode, or otherwise fail before the end of <br />its intended life. <br />(c) Uncovered tanks shall be operated to ensure at least 60 centi- <br />meters (2 feet) of freeboard, or the tank shall be equipped <br />with a containment structure (e.g., dike or trench), a drainage <br />control system, or a diversion structure (e.g., standby tank) <br />with a capacity that equals or exceeds the volume of the top <br />60 centimeters (2 feet) of the tank. <br />(d) If hazardous waste is continuously fed into a tank, the tank <br />shall be equipped with a means to stop this inflow (e.g., a <br />waste feed -cutoff system or by-pass system to a stand-by tank). <br />2. Analysis of waste and trial tests. <br />(a) If a tank is to be used for: <br />(1) Chemically treating or storing a hazardous waste which is <br />substantially different from waste previously treated or <br />stored in that tank; or <br />(2) Chemically treating hazardous waste with a substantially <br />different process than any previously used in that tank; <br />the owner or operator shall before treating or storing <br />the different waste or using the different process: <br />(i) Conduct waste analyses and trial treatment or storage <br />tests (e.g., bench scale or pilot plant scale tests) <br />to document that this proposed treatment or storage <br />will comply with Items ](a) and (b); or <br />(ii) Obtain written information on similar storage or <br />treatment of similar waste under similar operating <br />conditions to document that this proposed treatment <br />or storage will comply with Items 1 (a) and (b). <br />