TOTAL OF 8 QUESTIONS. 2 ARE DISCUSSION QUESTIONS. 6 MULTIPLE CHOICE. SEE ATTACHMENT.
1. A contractor was hired to do some maintenance work inside a grain silo. Assuming the facility is at sea level, what is the minimum level of oxygen necessary for the contractor to carry out his or her task without using a supplied air respirator?
A soil vapor extraction system equipped with carbon canisters is used to remediate gasoline contamination at a gas station. Which of the following statement is TRUE?