The EPA RI/FS workers are required by law to wear health and safety equipment while they are on the site performing any sampling or investigative work.
(The EPA RI/FS workers; are required; by law; to wear health and safety equipment while they are on the site) (The EPA RI/FS workers; to wear; health and safety equipment; T:while they are on the site) (they; are; on the site) (the site; performing; any sampling or investigative work)
The EPA RI/FS workers The EPA RI/FS workers they the site
are required to wear are performing
by law to wear health and safety equipment while they are on the site
health and safety equipment T:while they are on the site
on the site
any sampling or investigative work