The expression "scream blue murder" in paragraph 3 line 7 means 
The main purpose of the text is to 
‘Until I’m blue in the face’ in the fragment “I can stand in front of you and talk about working safely and what procedures to follow until I’m blue in the face.” (lines 1-3) is substituted, without change in meaning, by ‘until I 
The fragment ‘all of you have to come together on this issue, or we’re in trouble.’ (lines 18-19) is understood as a(n) 
The expressions “Complying with” and “follow through” in the fragments “Complying with OSHA regulations isn’t always easy,” (lines 10-11) and “Then it’s up to you to follow through the task and use the equipment as you were trained.” (lines 23-24) may, respectively, be substituted, without change in meaning, by 
The pronoun “those” in the sentence “Our hopes are that you won’t find too many of those around here.” (lines 32-33) refers to 
According to the text, employees have several safety responsibilities at work, EXCEPT 
The modal auxiliary in boldface conveys the idea of obligation in the fragment: 
Based on the meanings in the text, it is clear that 
The expression in boldface introduces the idea of consequence in the fragment: 