CNG Station Safety

Trillium CNG Compact Fueling Systems

CNG Equipment

Natural gas is supplied to our stations via pipeline after water vapor, sulfur and heavy hydrocarbons have been removed. It arrives at our stations at pressures between 100 and 150 psi. Our equipment compresses the gas so it can be used by dedicated, bi-fuel and dual-fuel natural gas vehicles.

Trillium CNG Fueling SafetyGas Inlet
The gas inlet supplies the gas to the system from the pipeline and regulates the gas flow rate.

Trillium CNG Fueling SafetyDryer
The dryer removes any residual water vapor by condensing it and draining it out.

Trillium CNG Fueling SafetyCompressor
The gas passes through 3-5 stages of compression to achieve target fill pressures.

Trillium CNG Fueling SafetyStorage
Compressors keep the storage tanks full, making fuel available for short fill times.

Trillium CNG Fueling SafetyDispenser
Dispensers distribute gas from storage and then the compressor.

Trillium CNG Fueling SafetyCustomer
Fill times are usually between 3 and 5 minutes depending on the amount of storage at a station.

Natural Gas Safety

Natural gas is a safe alternative fuel with nearly 15 million Natural Gas Vehicles (NGVs) and over 20,000 refueling stations worldwide. It has been used as a transportation fuel since the 1930s but has been recently developed in response to increasing energy demands and greenhouse gas emissions concerns. The key safety features of CNG include:

Trillium CNG Fueling Safety

Odorants detectable at 20% of the lowest ignitable limit are added to make the detection of natural gas possible before it reaches harmful levels.


Trillium CNG Fueling Safety

Natural gas has a narrow flammability range making it difficult to ignite. It must be at a concentration of between 5% and 15% volume in the air to catch fire.


Trillium CNG Fueling Safety

Natural gas is lighter than air and will dissipate rapidly rather than pool in one place, greatly reducing fire hazard.


Trillium CNG Fueling Safety

CNG is non-toxic and poses no threat as either a ground or water contaminant.


Trillium CNG

Emergency Indicators and Actions

Because your safety is our highest priority, we would ask you to please review these safety instructions before fueling and to contact us immediately if you have any additional concerns.

Trillium CNG Emergency Indicator: Fire
Move to a safe place, then call 911
Fires at CNG fueling stations are very rare due to station safety enhancements and natural gas’s narrow flammability range. In the unlikely event of fire, please move to a safe place and call 911.

Trillium CNG Emergency Indicator: Loud Popping Sound
Push the emergency stop button, then call 1-800-920-1166
Pressure release devices relieve gas pressure buildup, consequently producing a loud popping sound. While this is not an immediate safety concern, please push the emergency stop button and call our 24 hour dispatch team.

Trillium CNG Emergency Indicator: Gas Smell
Push the emergency stop button, then call 1-800-920-1166
If you detect an unusually strong odor of gas, see gas venting or hear a steady hissing sound, please push the emergency stop button and call our 24 hour dispatch team.

CNG Station Safety

CNG Station safety is a premeditated and recurring practice. Our technicians act as safety deputies, maintaining safe conditions and reacting quickly if necessary.

Trillium CNG Fueling Safety

Station technicians routinely inspect and maintain the stations to guarantee the continued operation of station components and safety enhancements.


Trillium CNG Fueling Safety

Our station engineers have enhanced the station with features that safely control the movement of gas.


Trillium CNG Fueling Safety

System controls monitor equipment performance and automatically shut down a station in the event of unsafe fueling conditions.


Trillium CNG Fueling Safety

Our 24 hour dispatch team provides around-the-clock monitoring and support. We can shut down a station and dispatch a technician as needed.

CNG Fueling Safety

Your safety is our highest priority. We employ all of the following hose and dispenser features to guarantee your safety while you fuel at your station.

Trillium CNG Fueling Safety

If a Customer drives off with the hose still attached, a breakaway device will cause a one-way check valve to close and cut off the supply of gas.

Trillium CNG Fueling Safety

Manual shut off valves can be used to turn off the dispensers and shut off the supply of gas to a hose.

Trillium CNG Fueling Safety

Emergency Shutdown (ESD) buttons are located in several places on site and will cause a station to shut down entirely when pushed.