<Tr> <Td> <Ul> <Li> Elimination </Li> <Li> Substitution </Li> <Li> Engineering controls </Li> <Li> Administrative controls </Li> <Li> Personal protective equipment </Li> <Li> Prevention through design </Li> </Ul> </Td> </Tr> <Ul> <Li> Elimination </Li> <Li> Substitution </Li> <Li> Engineering controls </Li> <Li> Administrative controls </Li> <Li> Personal protective equipment </Li> <Li> Prevention through design </Li> </Ul> <Li> Personal protective equipment </Li> <Li> Prevention through design </Li>

The four control techniques that comprise the hierarchy of controls are