Respirable Crystalline Silica in Construction questions for the CHST

Question 1

A laborer on a concrete crew performs three different Table 1 silica tasks during a single shift: jackhammering, handheld grinding, and drilling. The tasks add up to about 5 hours of work in total, though none individually exceeds 2 hours. Which respiratory protection must the employer require for each of these tasks?

1. AThe protection Table 1 specifies for less than four hours per shift, for each task, because no single task exceeds 2 hours
2. BNo respiratory protection, provided the engineering controls are fully implemented
3. CThe protection Table 1 specifies for more than four hours per shift, for each task
4. DThe protection specified for each task individually, based on that task's own duration

Question 2

A PLHCP's written opinion for a concrete cutter exposed to respirable crystalline silica states that the employee's chest X-ray was classified as 1/0 by the B Reader and recommends a specialist examination. The employer received the opinion on March 3 and is arranging the referral. The safety manager proposes sending the specialist only the worker's most recent air monitoring results, since those are the 'real' exposure data. Which response is consistent with the standard?

1. AHold the specialist's information until the specialist's written report is complete, then forward the full file for the employer's records
2. BSend the specialist everything the employer was required to give the PLHCP under paragraph (h)(4), and make the specialist examination available within 30 days of receiving the PLHCP's opinion
3. CLet the employee decide what information to hand over, and schedule the specialist visit within 30 days of the X-ray date
4. DAgree, because the specialist only needs current exposure data and the PLHCP already holds the rest of the record