Aisle maintenance shall conform to the following:
1. Aisles and entrances shall be kept free of storage and equipment not being handled or operated.
2. Storage piling and blocking shall be maintained to prevent materials from accidentally falling into aisles or clearance areas.
3. Stored materials shall not be piled so as to create overhanging or bridging of main aisles or side aisles.
4. Hazardous refuse shall be removed from aisles and properly stored or disposed of in accordance with Section 304 of the CFC.