Section 148.125 - Stowage and segregation for materials of Class 4.1(a) Class 4.1 materials listed in Table 148.10 of this part must- (1) Be kept as cool and dry as practical before loading;(2) Not be loaded or transferred between vessels during periods of rain or snow;(3) Be stowed separated from foodstuffs; and(4) Be stowed clear of sources of heat and ignition and protected from sparks and open flame.(b) Bulkheads between a hold containing a Class 4.1 material and incompatible materials must have cable and conduit penetrations sealed against the passage of gas and vapor.