Q: What are the guidelines on the diesel fuel test for the generator as far as having it treated or a sample sent off for testing?
A: The new 2012 Life Safety Code references the 2010 edition of NFPA 110, the standard for emergency and standby power systems. Section 8.3.8 of the NFPA 110-2010 requires the fuel for the generators to be tested annually for quality. According to more recent editions of NFPA 110, this test is to be conducted in accordance with ASTM D975, Standard Specification for Diesel Fuel Oils. You may purchase a copy of the standard direct for the ASTM website https://www.astm.org/Standards/D975.htm