Unit
IV Case Study
Consider
the scenario below:
Workers need to enter a below-ground, concrete-lined vault to
repair a leaking valve that controls the flow of wastewater from several buildings
at your plant. The opening for the pit is outdoors and secured with a 36-inch
diameter manhole cover. The pit is 12 feet deep, and the walls are 6 feet x 6
feet wide. The valve is at the bottom of the vault. You opened the cover,
tested the atmosphere, and found oxygen levels to be at 16%. No toxic
substances were detected. After ventilating the space for 15 minutes, the
oxygen reading reached 18% and remained at that level.
Address
the following items:
Using the flow chart in Appendix A of 29 CFR 1910.146, determine
the classification of the space. Explain how you reached the decision.
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Based on your determination, develop an OSHA-compliant standard
operating procedure (SOP) for workers to follow when entering the space to
repair the valve. Include the citation(s) from 29 CFR 1910.146 for each step of
the procedure.
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Your
submission must be a minimum of two pages in length (double-spaced). Be sure to
include a title page.
Information
about accessing the grading rubric for this assignment is provided below.
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