Whether gas, diesel, biodiesel, oil, petroleum, or aviation fuel,  one thing is certain – all fuel degrades over time. Fuel sampling and testing services help you know your fuel and tank conditions in order to maintain optimum fuel quality and avoid unexpected surprises.   

We can come to your tank, and take a 4oz sample of fuel, so you can get an idea of the fuel conditions.  Visual inspection can tell you a lot about your tank and fuel, such as how much rust or water it appears to contain.

An example fuel sample, showing water, rust, particulate.

For instance, when biological contamination is really strong, you can often see the bacteria in the fuel sample.

Other times, there can be bacterial contamination and water in fuel that cannot be seen.  Some chemical fuel additives cause water to be suspended in small amounts in the fuel, instead of collecting in the lowest point in the tank.

For many reasons, though, visual testing only gives a best-case idea of tank conditions – it doesn’t tell the whole story.

Lab testing is the only fully reliable way to know what is happening in your tank

We want to work with you to provide just the services you need: no more or less.  Lab test results are generally available in 3 business days, and provides a very good picture of tank and fuel conditions.

These are the most common lab packages our clients depend on for peace of mind:

Fuel Assurance Package

  • ASTM D86-10 - Atmospheric Distillation

    Tests the temperature at which 90% fuel volume can be distilled off. This indication is relative to the cetane level, flash point, and viscosity. Basically, indicating how fast the diesel fuel will ignite.
    (* If diesel fuel doesn’t ignite quick enough, generators don’t start).

  • ASTM D6304-07 - Dissolved water by Karl Fischer

    Measures water and moisture content by filtration and is reported in either parts per million or % by volume. (* Any amount of water aggressively invites bacterial growth.)

  • ASTM D93-10 - Flash Point

    Tests the lowest temperature vapors ignite momentarily in the air. Low diesel fuel flash points indicate contamination by other fuels, likely gasoline. (*The higher the flash point, the more volatile the fuel – too high and the site will be shut down.)

  • Microbial/Fungus Growth

    Generates a positive/negative test result indicating the presence of bacterial growth.
    (* untreated bacterial growth causes equipment failure.)

Essential Diagnostic Package

  • ASTM D976-01 - Cetane Index

    Measures diesel fuel’s ignition quality – higher cetane fuels will have shorter ignition delay periods

  • ASTM D5453-03a - Sulfur Content

    Measures sulfur levels to ensure that the fuel remains within government regulations (* outside regulation limits may cause site shut down)

  • ASTM D1298-99 - API Gravity

    Measures fuel density or weight per volume

  • ASTM D2500-99 - Cloud Point

    Temperature at which wax crystals begin to form

  • ASTM D5950 - Pour Point

    Lowest temperature at which fuel will still pour

  • Microbial/Fungus Growth

    Generates a positive/negative test result indicating the presence of bacterial growth.
    (* untreated bacterial growth causes equipment failure.)

  • ASTM D6304-07 - Dissolved water by Karl Fischer

    Measures water and moisture content by filtration and is reported in either parts per million or % by volume. (* Any amount of water aggressively invites bacterial growth.)

Mission Critical Diagnostic Package

  • ASTM D1298-99 - API Gravity

    Measures fuel density or weight per volume

  • ASTM D4176-04 - Standard Test Method for Free Water and Particulate Contamination

    Provides a rapid pass/fail method for contamination in a distillate fuel

  • ASTM D976-01 - Cetane Index

    Measures diesel fuel’s ignition quality – higher cetane fuels will have shorter ignition delay periods

  • ASTM D1304 - Corrosion Copper Strip

    Measures corrosiveness to Copper

  • ASTM D86-10 - Atmospheric Distillation

    Tests the temperature at which 90% fuel volume can be distilled off. This indication is relative to the cetane level, flash point, and viscosity. Basically, indicating how fast the diesel fuel will ignite.
    (* If diesel fuel doesn’t ignite quick enough, generators don’t start).

  • ASTM D6304-07 - Dissolved water by Karl Fischer

    Measures water and moisture content by filtration and is reported in either parts per million or % by volume. (* Any amount of water aggressively invites bacterial growth.)

  • ASTM D93-10 - Flash Point

    Tests the lowest temperature vapors ignite in the air

  • Microbial/Fungus Growth

    Generates a positive/negative test result indicating the presence of bacterial growth.
    (* untreated bacterial growth causes equipment failure.)

  • ASTM D5453-03a - Sulfur Content

    Measures sulfur levels to ensure that the fuel remains within government regulations (* outside regulation limits may cause site shut down)

  • ASTM D2709 - Tests for water and sediment in middle distillate fuels by centrifuge

    This test method is used as an indication of free water and sediment suspended as haze, cloudiness, or droplets in middle distillate fuels