Continuous or intermittent monitoring of the permitted space may be implemented depending on the potential atmospheric conditions that may be experienced during operations. Corsafety.ca personnel or their representative are entitled to request additional monitoring at any time, if they believe changes have occurred.
The instrument probe or line must extend into the confined space at least 4 feet so that the person performing the test is not entered into the space. Since particular gases can stratify in layers in a confined space, testing will be performed at multiple levels of the space to be entered.
- If an instrument reading ever indicates an unusual, unexpected, or unacceptable atmospheric condition, it is never to be ignored, or assumed to be due to instrument error.
Note: If a bad reading is recorded, all necessary measures will be taken to correct the situation (re-calibrate instrument, ventilate space, etc.) Corsafety.ca personnel will not be expected to enter confined spaces until it is deemed safe to do so, and the acceptable entry conditions recorded on the entry permit.