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Hazardous Noise Case Study


You have been hired as a consultant to help a local machine shop solve a hazardous noise problem. The shop is 10,000 square feet in area, with 12-foot high concrete block walls, and a flat metal roof. Inside the shop are two band saws, two metal lathes, three drill presses, one milling machine, and three abrasive grinders. The six employees work at benches located throughout the shop, using a variety of pneumatic-powered hand tools and non-powered tools. A recent noise survey found sound pressure levels exceeding 100dBA in some parts of the shop. All employees were monitored for noise exposure over an eight-hour workday, and the calculated TWA for noise for the employees ranged from 88dBA to 97dBA.


Using the Risk Assessment Matrix in pdf attached (ANSI-Z10), conduct an initial hazard analysis and risk assessment based on the information in the scenario provided. Discuss how you arrived at the risk level estimate.


Determine a possible control measure for each of the six levels in the hierarchy of controls:

A.    Elimination

B.    Substitution of less hazardous materials, processes, operation, or equipment

C.   Engineering Controls

D.   Warnings

E.    Administrative Controls

F.    Personal Protective equipment


Explain the reasoning behind each choice. For each of the selected control measures, reevaluate the original risk. In a summary paragraph, discuss the results and how the shop managers could determine which control measures would be required and which others might be beneficial to their operations.


Your paper must be a minimum of two pages in length, not counting cover page and references, and follow APA formatting for the paper, as well as for all references and in-text citations.