Our fuel technicians and laboratory have over 12 years of diesel fuel quality testing experience. Our annual fuel quality testing and surveillance services will assure that the fuel in your diesel tank(s) is in good operable condition and your emergency generator system is ready to go on a moments notice. Stored diesel fuel is your asset, and improper storage or testing can result in the need to replace the fuel at a significant cost or worse.
Today's diesel fuels are not the same as they once were. The Commonwealth of Massachusetts has adopted ASTMD975 as the standard specification for the delivery of diesel fuel in the Commonwealth. While the standard was established in the mid-20th century to ensure proper diesel engine performance, it has been heavily revised over the decades. The most significant modern update occurred in the early to mid-2000s, when the standard was updated to incorporate Ultra-Low Sulfur Diesel (ULSD) with a sulfur cap of 15 parts per million (ppm) to meet strict environmental regulations.
Today's USLD also contains 5% bio fuel blending which is allowed by ASTM D975. This 5% vegetable oil has proven to be the challenge to today's emergency generators. Unlike diesel fuel, vegetable oil can entrain water molecules which can clog fuel filters. The presence of water and biofuel also lends toward the growth of microbes on the oil water interface. Testing for microbial contamination using an approved ASTM method with a numeric measurement as opposed to a pass/fail result is critical to observe trends in the fuel quality. Luckily microbes can be treated quickly and effectively with proper biocide treatment.
Since periodic microbial testing and treatment are a proven and reliable option, the more pressing issue in today's diesel fuel storage systems is issues with the fuel's oxidative fuel stability. Today's diesel fuels are "built" to be used within one heating season. The issue that has become apparent is that hospitals, other healthcare providers, and mission critical data centers are required to maintain 72 to 96 hours of fuel for their generator systems, resulting in fuel being stored on site far beyond it's intended lifespan. Unlike microbial issues, there is no magic additive that can be poured into diesel fuel to make it new fuel again. Once the fuel stability is gone, it can no longer be safely burned in an internal combustion engine and may require disposal which can be very costly.
Give us a call to discuss your diesel fuel and what we can do to improve your fuel quality and protect your valuable asset!