Fuel Sampling & Analysis

In order for Southworth Fuel Solutions to properly address your problems and recommend the most cost effective solution, the condition of your Diesel Fuel and tank must be assessed. Your fuel should
be analyzed by a certified petroleum testing company. The following tests are necessary to assess the condition and integrity of your fuel:

  • Water and Sediment – where there is water, the probability of microbial growth is high. ASTM standard D2709 maximum acceptable value of water and sediment is 0.05%
  • Percentage of Bio-Diesel – you may not necessarily purchase bio-diesel, but current standards allow diesel fuel to contain up to 5% bio-diesel without informing the consumer. Bio-Diesel degrades at a faster rate than standard diesel; therefore tanks with any amount of bio-diesel must be monitored very closely for early degradation and faster rates of microbial growth.
  • Microbial Growth (ASTM D6469) – Diesel Fuel should be cultured for bacteria, yeast, and mold. While biocide additives may have been added to your fuel, the dead cells still settle to the bottom of the tanks and can cause problems such as shortened filter life and possible fuel
    starvation for your power plant.
  • Sulfur – Today’s diesel fuel standards require that sulfur levels be less than 15 p.p.m. (ASTM D4294). Analyzing fuel for sulfur levels can help determine the age of your fuel and the consumer can make an educated decision about remediation or replacement.
  • Storage Stability tests (ASTM D6468/F21-61) include color evaluation, average reflectance, and a DuPont ® filter rating. These tests determine how much the fuel may have oxidized and if it is still capable of providing your Emergency Power System with the necessary performance under a load for and extended period of time.
  • Tank Condition – Your tank should be evaluated for the following:
    • General appearance – obvious physical damage, missing access port caps (which can be a source of water intrusion), faded or missing placards and signage
    • Obvious sediment found during sampling from the bottom of the tanks
    • Filter Condition – have your maintenance personnel been changing fuel filters on a frequent basis – on both the fuel tanks and any vehicles or equipment that may have been fueled from this source.
    • Excessive corrosion due to by products of bio-diesel degradation