A. be}d unt hen he werned UW with d be mon esa than 10 icted & ow. vents through t ed the son can across « highwa hicles shoul ed_and od the cars When unt warned coed with windows and air yents closed and should be monitored after passing through he axinated ni 8 a de un there is reasonable belief that no or very few additional vehicles will exceed the values given in table IV,e. 14 ne his GT ofpCEE AV 4y