Standards for Establishing Places for Manufacturing, Storing, Processing Public Hazardous Substances and Flammable Pressurized Gases, and Regulations on Safety Control of such Places Article 68

The exterior wall or the outer side of facilities equivalent to an exterior wall at the liquefied petroleum gas manufacturing place of shall be kept a safety distance as respectively listed in L1 and L4 of Table 1 below from Class 1 and Class 2 Objects under Protection located outside the place; with the exception that the safety distance between the place and Class 1 and Class 2 Objects under Protection outside the place when falling short of that as specified in L1 or L4, falls within the safety distance listed in Table 2 and that security measures have been provided pursuant to Table 2.The security measures referred in the preceding paragraph shall be as follows:1.The storage tank or the process equipment is buried under the lava;2.Water spray system or the equivalent fire prevention system is provided to the storage tank or process equipment; and3.The explosion proof wall or the protection equivalent to or better than such wall is provided at where between the storage tank or the process equipment and Class 1 or Class 2 Objects under Protection.Article 68：table 1～2.PDF