Resources

Mine Air  Quality

Air is a mixture of gases in the natural atmosphere. The main constituents of air are:

• nitrogen 78%
• oxygen 21%
• carbon dioxide 0.03%
• other gases 0.9%.

Of these, the gases of greatest interest are oxygen and carbon dioxide.

Read more

Interesting Facts About Alcohol

One of the most common causes of falsely high breathalyzer readings is the existence of mouth alcohol. Recent Drinking is the main cause of mouth Alcohol. After consuming alcoholic drinks alcohol resides in the mouth until it evaporates or is removed by eating food and rinsing.

Read more

Portable Laser Gas Detector Systems for Greenhouse Gas Emissions and Monitoring in Oil and Gas Operations

Two types of portable laser based gas detector for measuring emissions of the greenhouse gases carbon dioxide (CO2) and methane (CH4) from oil and gas operations are described. A scanning open path detector was developed within a Cooperative Research and Development Agreement (CRADA) with the USEPA. This system scans multiple paths across an area source in rapid succession, enabling calculation of concentration profiles and emissions fluxes. A vehicle mounted detector acquires ambient CH4 or CO2 data with excellent concentration and spatial resolution.  The long wavelength laser used enables CO2 resolution of 5 ppm. Field data from both types of detector are presented.

Read more