Laserfiche WebLink
aq <br />X• SURFACE IMPOUNDMENTS <br />I. Freeboard <br />The surface impoundment(s) shall maintain enough freeboard (at least <br />60 centimeters (2 feet)) to prevent any overtopping of the dike by <br />overfilling, wave action, or a storm. <br />2. Dikes <br />All earthen dikes shall have a protective cover, such as grass, shale, <br />or rock, to minimize wind and water erosion and to preserve their <br />structural integrity. <br />3. Analysis of waste <br />1 <br />(a) Whenever a surface impoundment is to be used for: <br />(1) Chemically treating a hazardous waste which is substantially <br />different from waste previously treated in that impoundment; <br />or <br />(2) Chemically treating hazardous waste with a substantially <br />different process than any previously used in that <br />impoundment; the owner or operator shall, before treating <br />the different waste or using the different process: <br />(i) Conduct waste analyses and trial treatment tests <br />(e.g., bench scale or pilot plant scale tests); or <br />(ii) Obtain documented information on similar treatment of <br />similar waste under similar operating conditions; to <br />show that this treatment will comply with Item 7(b), <br />Part III of this document. <br />4. Inspections <br />(a) The owner or operator shall inspect: <br />(1) The freeboard level at least once each operating day to <br />ensure compliance with Item 1; and <br />(2) The surface impoundment, including dikes and vegetation <br />surrounding the dikes,at least once a week to detect any <br />leaks, deterioration, or failures in the impoundment. <br />5. Closure and post -closure <br />(a) At closure, the owner or operator may elect to remove from the <br />impoundment: <br />(1) Standing liquids; <br />