course material

1. Analyze the hazards in both areas of the facility using one of the methods
described in Chapter 3 of the textbook
Analyze the hazards in both areas of the facility using one of the methods described in
Chapter 3 of the textbookUnit VIII ProjectRead the background and scenario descriptions in
Sections I and II of the instructions. Prepare a paper addressing each of the subsections of
Section III. Make sure you read each section completely and carefully before preparing your
paper.I. BackgroundAcme International has a small manufacturing shop that includes two
welding stations and a separate paint room. Two welders produce small components for
automobiles using stainless steel and MIG welding. After grinding has been performed in
the welding bays, the parts are painted in the paint room. The only ventilation present is a
ceiling fan in each room that is used for general dilution ventilation.Note: Because of
specifications from their client, substitution is not a viable control method for either the
welding or painting operations.An industrial hygienist (IH) recently conducted air
monitoring at the facility. In the welding bays, the IH conducted initial monitoring with a
personal sample collected on each welder and analyzed for hexavalent chromium (Cr+6).
The results showed that time weighted average (TWA) exposures were 6.2 micrograms per
cubic meter (µg/m3) and 6.6 µg/m3. The OSHA TWA PEL is 5 µg/m3 with an action level of
2.5 µg/m3.The paint area uses primer and paint containing benzene, ethyl benzene, toluene,
and xylene. Workers in the area also use acetone on rags to clean surfaces. One employee
was sampled for the entire work shift. A second employee was sampled for 15 minutes
(STEL sample) while cleaning with the acetone and for 15 minutes (STEL sample) while
mixing the primer and paint. The table below summarizes the results of the sampling, along
with the applicable permissible exposure limits (PELs) established by OSHA and the
guidelines (threshold limit values or TLVs) published by the American Conference of
Governmental Industrial Hygienists (AGGIH).Analyte SampleType AnalyticalResults OSHA
PELTWA OSHA PELSTEL ACGIH TLVTWA ACGIH TLVSTELBenzene TWASTEL 12 ppm25
ppm 1 ppm 5 ppm 0.5 ppm 2.5 ppmEthyl Benzene TWASTEL 20 ppm35 ppm 100 ppm NE
20 ppm NEToluene TWASTEL 15 ppm30 ppm 200 ppm 500 ppm(10 min.) 20 ppmNEXylene
TWASTEL 24 ppm36 ppm 100 ppm NE 100 ppm 150 ppmAcetone TWASTEL 14 ppm124
ppm 1000 ppm NE 200 ppm 500 ppmppm = parts per millionNE = None EstablishedII. The
ScenarioYou have been hired by Acme International to evaluate the work areas, recommend
controls, design the controls, and install the controls.III. Assignment. Using the text book.
John W. Mroszczyk. (2012). Safety engineering (4th ed.). Des Plaines, IL: American Society

2. of Safety Engineers.1. Analyze the hazards in both areas of the facility using one of the
methods described in Chapter 3 of thetextbook. You should identify at least two hazards in
each area (welding and painting).2. Perform a risk assessment on at least two hazards in
each area using the 4X4 matrix in Table 17-3 of the textbook.3. Prioritize the need for
controls for the hazards you selected based on the results of the risk assessment.4. Using
the hierarchy of engineering controls listed on page 420 of the textbook, recommend a
control method for each hazard that you believe would be the most effective in reducing
risk to an acceptable level. Use the 4X4 matrix to show the reduction in risk for each hazard.
Note: At least one control method must be a local exhaust ventilation (LEV) system.5. For
the LEV, specify the hood configuration, a recommended capture velocity, and a
recommendation for treatment of the exhaust stream. Explain why you made the choices
and support your decisions with atleast one reference other than the text.6. Discuss how
Prevention through Design could be used to reduce the risks associated with these
operations if you were hired to design a new facility performing these same activities from
scratch.Prepare your paper in a properly formatted APA document, including a title page, a
brief abstract section, the body of the paper, and a reference page. The body of your paper
must be a minimum of four pages in length and double-spaced (title page, abstract, and
reference page do not count toward the four-page minimum). You must use your textbook
and at least one other source.Information about accessing the Blackboard Grading Rubric
for this assignment is provided below.Studentsshould use APA style for papers and projects.
Therefore, the APA rules for formatting, quoting, Paraphrasing, citing, and listing of sources
are to be followed accordingly.