The employer shall administer a continuing, effective hearing conservation program whenever employee noise exposures equal or exceed an $8-$hour time$-$weighted average sound level $($TWA$)$ of $\_\_\_\_\_\_\_\_.$

Question $7$ options:

a$)$

$82$ dBA

b$)$

$85$ dBA

c$)$

$90$ dBA

d$)$

$130$ dBA