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Section 3403.6, Piping systems, shall be amended to add a sentence to read as follows: An approved method of secondary containment shall be provided for underground tank and piping systems. Section 3404.2.11.5, Leak prevention, shall be amended to add a sentence to read as follows: An approved method of secondary containment shall be provided for underground tank and piping systems. Section 3404.2.11.5.2, Leak detection, shall be amended to read as follows: Underground storage tank systems shall be provided with an approved method of leak detection from any component of the system that is designed and installed in accordance with NFPA 30 and as specified in Section 3404.2.11.5.3. Section 3404.2.11.5.3, Drysumps, shall be added to read as follows: Approved sampling tubes of a minimum 6 inches in diameter shall be installed in the backfill material of each underground flammable or combustible liquid storage tank. The tubes shall extend from a point 12 inches below the average grade of the excavation to ground level and shall be provided with suitable surface access caps. Each tank site shall provide a sampling sump at the corners of the excavation with a minimum of 4 sumps. Sampling tubes shall be placed in the product line excavation within 10 feet of the tank excavation and one every SO feet routed along product lines towards the dispensers, a minimum of two are required. Section 3406.5.4.5 shall be deleted and replaced to read as follows: 3406.5.4.5 Commercial, industrial, governmental or manufacturing. Dispensing of Class II and III motor vehicle fuel from tank vehicles into the fuel tanks of motor vehicles located at commercial, industrial, governmental or manufacturing establishments is allowed where permitted, provided such dispensing operations are conducted in accordance with Sections 3406.5.4.5.1 through 3406.5.4.5.3. 33 ~ 0 L~C, DR5