We have been monitoring networks of ambient monitoring stations throughout the 1990's.

 "There is much more to a well-run ambient network than equipment. ETI knows field applications and US EPA guidelines assuring that field data is defensible. Quite frankly it seems Emission Technologies Inc. is the only qualified air quality vendor in this region of the Pacific Rim. If I sound like I like ETI your right, utilizing their expertise makes me look good!"  Utility Engineer