42-463 - Maximum permitted quantities of fissionable materials LAST AMENDED 6/6/2024 In M1 or M2 Districts, no one of the following fissionable materials shall be assembled at any one point, place, or work area on a #zoning lot# in a quantity equal to or in excess of the amount set forth herein: Material Quantity Uranium-233 200 grams Plutonium-239 200 grams Uranium-235 350 grams In addition, any establishment which provides radiation waste disposal services in the nature of collection or storage of radioactive waste from other #manufacturing uses# shall be prohibited in M1 or M2 Districts.