Water and Wastewater Terms Beginning O
A B C D E F G H I J K L M N O P Q R S T U V W Y Z
oxygen enrichment
An atmosphere containing oxygen at a concentration of more than 23.5 percent by volume.
A B C D E F G H I J K L M N O P Q R S T U V W Y Z
An atmosphere containing oxygen at a concentration of more than 23.5 percent by volume.
