air	2.31017
air	2.30986
air	2.3101
air	2.31001
air	2.31024
air	2.3101
air	2.31028
air	NA
chemical	2.30143
chemical	2.2989
chemical	2.29816
chemical	2.30182
chemical	2.29869
chemical	2.2994
chemical	2.29849
chemical	2.29869