EPA Method 27 Vapor Tightness Test

The EPA Method 27 Vapor Tightness Test is a critical procedure designed to ensure your cargo tank or system is free from vapor leaks.

Whether you are in need of an annual truck inspection or 5 year inspection, this test is essential for meeting environmental regulations.

This test is required to meet strict environmental regulations that help protect the environment and your business from harmful emissions.

By accurately measuring the vapor tightness of your tank, we ensure that it complies with the EPA's standards for vapor control.

This not only helps you avoid penalties but also ensures the safe operation of your facility, safeguarding both your operations and the environment.

What does it involve?

How does it work?

We conduct the EPA Method 27 test by introducing a controlled pressure into the tank and closely monitoring for any vapor leaks. Using advanced equipment, our technicians measure the tank's ability to retain vapors, ensuring it is tightly sealed. If any leaks are detected, we will identify their source and provide a comprehensive plan for repairs.

The test includes several key procedures:

Pressure Test: A critical procedure to check the tank’s ability to withstand pressure without leaking.

Vapor Valve Test:   This test checks that the vapor valve is functioning correctly and ensuring no leaks.

Vacuum Test: Conducted to assess the tank's ability to maintain a vacuum without vapor escaping.

Once the test is completed, you’ll receive a detailed report outlining the status of your tank’s vapor tightness, any leaks detected, and recommendations for repairs or improvements. The test is quick and efficient, helping you meet federal environmental laws and avoid operational disruptions.

Testing Requirements

The EPA Method 27 Vapor Tightness Test applies to specific types of cargo tanks, including:

MC 306

DOT 406

MC 307

DOT 407

There are exceptions for certain shipments:

If a cargo tank is transporting ethanol, diesel fuel, or hazmat (other than gasoline) for a single trip, the EPA Method 27 test is not required.

However, if the cargo tank is used for transporting other products, an 80% leakage test is mandatory.

Additionally, the cargo tank must have a vapor recovery system, and only combustible vapors (such as diesel fuel or jet fuel) are allowed for testing.

Why is it important?

The EPA mandates this test to prevent the release of harmful vapors into the atmosphere, reducing environmental impact and improving public health. Regularly performing vapor tightness tests helps maintain your equipment's efficiency, prolong its lifespan, and minimize maintenance costs. Furthermore, staying compliant with EPA regulations helps you avoid costly fines and ensures that your operations remain environmentally responsible.

Vapor Tightness Testing Done Right!

Call us today at (814) 388-7626 for a Vapor Tightness Testing or any other commercial vehicle inspection needs.