### Natural Gas STAR Releases Video Highlighting Remote Sensing Leak Detection Technologies

**Section 1:**

Nar: the US environmental protection agency is promoting new
technologies for methane leak screening in a directed inspection and
maintenance program.

The passive infrared camera provides a real time image and video
recording of methane gas leaks that are invisible to the human eye.

The camera operator can see and points out a leak that the survey
operator is trying to find with an organic vapor analyzer probe

The leaking tube connector is readily apparent in the infrared camera
image.

Here the IR camera operator scans hundreds of potential leak sources
from a distance. Spotting the lightlighted flange leak.

A piece of paper provides a background for the camera recording of the
leaking gas.

Leaks that are hard to reach with hand held sniffers are readily seen
with the camera

This valve had been inspected for years using traditional methods and
was never found to be leaking, the IR camera reveals there is a pinhole
leak in the valve on it, rather than the packing stem where leaks
normally occur.

Here the camera is used to find leaks from under ground distribution
system mains.

The IR camera can also be used as a safety device for maint workers as
it detects gas in an under ground regulator valve(?) when the manhole
cover is raised.

Pipeline excavation and repair crews can use the camera to avoid human
exposure to leaking gas.

Traditionally floating roof tank inspections are performed when the tank
is still and the tank roof is at a high level so that hydrocarbons are
dispersed by the wind. The IR camera can inspect a floating roof tank at
any level from the access platform. Here the tank is about 1/3 full and
the operator can spot gas leaks from the guide polls.

**Section 2**

The IR camera is also used from a helicopter to quickly survey for large
leaks from remote facilities.

The camera detects large leaks as far as three miles away and can record
the image with GPS coordinates.

Here the camera has picked up a large amount of casing head gas that is
being vented from a stripper well.

And this survey shows gas being vented from production stock tanks.

**Section 3:**

This section shows some other leak detection devices based on infrared
light absorption by methane gas.

This methane leak detection device uses an infrared laser beam to
measure methane concentration along the beam path.

Methane leaks can be detected from a distance of up to 100 ft from the
source.

This laser detection device can pinpoint the methane leak by scanning
the beam over the equipment. The green targeting laser is a visual aid
to help the operator determine where he is aiming the invisible IR laser
beam during the screening.

While using the digital methane detector or DMD, no sound will be heard
until the detection of methane occurs.

The pitch of the sound will be relative to the methane concentration.
The higher the pitch the stronger the methane concentration is.

The laser works best when scanning at distance of 15-20 feet and beyond,
use the green spotter laser to effectively know where you're scanning.

Up to 1000 miles per day of cross country pipe lines can be surveyed for
leaks with the air borne natural gas emissions lidar (?) or angel
system.

This technology collects the reflected IR laser and GPS data while
recording a visual image of the pipe line right of way.

The data is super imposed to map locations and concentration of methane
leaks.

Angel services can also identify large methane leaks from individual
tanks in production tank batteries.

The US EPA's natural GasStar program wishes to thank the companies who
are helping our partners to reduce our methane emissions with better
technologies