Occupational Health and Industrial Hygiene Commons^™

Welding Fume Exposure In A Mechanic’S Shop On Uc Santa Cruz Campus, Neema Mahini

Graduate Theses & Non-Theses

This study was triggered from worker complaints about metal fume odors during metal welding in a mechanic garage. Hard-face welding, which includes use of an electrode to join metal pieces together, occurs once per year in this occupational setting and was chosen for this study because of the large amount of smoke that is produced, giving the study a worst-case scenario element. Sampling occurred over a period of one hour, which is the same amount of time hard-face welding is conducted when applicable. Results show that a worker performing hard-face welding was not exposed to metal fume concentrations above any …

Ymca Fitness Assessment: Tool For Evaluation With Regards To Ergonomics, Jacob Havlovick

Graduate Theses & Non-Theses

Professional ergonomists have several methods to analyze lifting tasks, in which the main goal is to determine the amount of strain on the body during manual material handling tasks. Several physical characteristics have been used to determine lifting capabilities, but developed screening methods do not cover the necessary traits or the right number of traits to predict an accurate level of strain. This project examined the use of the YMCA Fitness Test Assessment as a possible screening tool to determine lifting performance.

The project had one objective; To determine the association of any physical characteristic that might be used to …

The Use Of Cryogenic Air In Supplied Air Respiratory Protection, Matthew Doctor

Graduate Theses & Non-Theses

The Mine Improvement and New Emergency Response (MINER) Act of 2006 implemented new regulations in the underground coal mining industry that allow for the certification of non-compressed gas equipment for respiratory protection in underground coal mines. NASA’s Kennedy Space Center (KSC) Biomedical Research and Engineering Laboratory (BRL) is investigating the potential to expand cryogenic air supply systems into the mining and general industries. These investigations have, so far, resulted in four separate comparison and hardware development programs.

The Propellant Handlers Ensemble (PHE) and Level “A” Ensemble Comparison (LAE):

This study compared worker thermal stress while using the industry standard Level …

An Evaluation Of Carbon Concentrations Associated With Biodiesel Particulate Matter In An Underground Metal Mine, David Evans

Graduate Theses & Non-Theses

Exposure to diesel particulate matter from diesel exhaust has been shown to have adverse health effects in humans. In 2012 The International Agency for Research on Cancer classified diesel exhaust as a group 1 know human carcinogen. Because of the associated health effects, there has been a strong push to reduce the amount of diesel exhaust present in the mining industry. Biodiesel is one to the more common and promising control options used to reduce the amount of diesel particulate matter that is generated during fuel combustion. The use of biodiesel over petroleum diesel has been shown to reduce not …

Field Study Confirms The Belief That Keeping Busy Helps Control Room Operators Sustain Alertness During The Night Shift, Roger C. Jensen

Safety Health & Industrial Hygiene

Control room operators in a nuclear power plant participated in this on-site study to test the belief that keeping busy helps sustain alertness. Since circadian rhythms strongly affect alertness, the study was designed to account for different times of the 24-hour day.The participating reactor operators worked rotating 8-hour shifts in the control room. Every 20 minutes they reported their alertness and their workload during the preceding period. These ratings were obtained throughout three of each shift, for a total of nine shifts and 560 pairs of ratings. Reduced alertness ratings (2 and 3 on the 9-point alertness scale) occurred only …

A Measurement System Experiment To Evaluate The Nosing-To-Nosing Method For Measuring Dimensions Of Steps, Lea S. Jensen, Roger C. Jensen, Craig E. Ross

Safety Health & Industrial Hygiene

Non-uniformity of steps within a flight is a major risk factor for falls. Guidelines and requirements for uniformity of step risers and tread depths assume the measurement system provides precise dimensional values. The state-of-the-art measurement system is a relatively new method, known as the nosing-to-nosing method. It involves measuring the distance between the noses of adjacent steps and the angle formed with the horizontal. From these measurements, the effective riser height and tread depth are calculated. This study was undertaken for the purpose of evaluating the measurement system to determine how much of total measurement variability comes from the step …

Stairway Step Dimensions: Replication Of A Measurement System Study, Christopher Hicks, Roger C. Jensen, Joselynn M. Adams

Safety Health & Industrial Hygiene

This paper reports a replication of a prior measurement system study. The earlier study examined the nosing-to-nosing measurement system for measuring steps in a stairway to determine uniformity. In each study, two individuals measured six flights of stairs on two separate occasions. The difference in the first and second study was the different measurers. Step attributes used to define uniformity are riser height and tread depth. The measurers in each study obtained 744 values of riser height and 672 values of tread depth. The ANOVA for each study indicated that less than 4% of the variance in these attributes was …

The Presence Of Asbestos-Contaminated Vermiculite Attic Insulation And/Or Other Asbestos Containing Materials In Homes And The Potential For Living Space Contamination, Terry Spear, Julie Hart, Tessa Spear, Molly Loushin, Natalie Shaw, Mohamed Elasheb

Safety Health & Industrial Hygiene

Asbestos-contaminated vermiculite attic insulation (VAI) produced from a mine near Libby, Montana, may be present in millions of homes along with other commercial asbestos-containing materials (ACM). The primary goal of the research described here was to develop and test procedures that would allow for the safe and effective weatherization of low-income homes with asbestos. The presence of asbestos insulation was confirmed by bulk sampling of the suspect asbestos material. The homes were then tested for the presence of asbestos fibers in the living spaces. All 40 homes containing VAI revealed the presence of amphibole asbestos in bulk samples. Asbestos (primarily …

Occupational Health And Safety Management Systems Assessment Training, William Brazile, Daniel Autenrieth, Del Sandfort

Safety Health & Industrial Hygiene

An occupational health and safety management system (OHSMS) is required for all Federal agencies by Executive Order 12196 – Occupational safety and health programs for Federal employees. Development of the Occupational Health and Safety Management Systems Assessment Training Manual was supported jointly by the U.S. Veterans Health Administration (VHA) and the Occupational Safety and Health Administration (OSHA). The manual was designed to be used in the training of government personnel on how to assess the OHSMS of Federal establishments and agencies. The manual is organized sequentially through each step in the process of conducting an OHSMS assessment. Trainees start …

Effects Of Standard Labor-Wear On Swimming And Treading Water, John Amtmann, Edd, Les Harris, William K. Spath, Charles Todd, Phd

Applied Health Sciences

We tested the hypothesis that occupational clothing would impair performance during swimming. The sub questions included: (1) Will the standard work wear of a railway worker or laborer impede swimming ability? (2) Will this clothing impact the individual’s ability to tread water? We addressed the research questions with three hypotheses. Analysis showed statistically significant p-values and all three null hypotheses were rejected in favor of the three research hypotheses, showing strong evidence that standard labor wear had adverse effects on 11.43 meter/12.5 yard swim time, water treading time and rate of perceived exertion (RPE) during water treading. The mean swim …

Developing Higher-Level Cognitive Skills In A Fire Protection Course, Roger C. Jensen

Safety Health & Industrial Hygiene

In an ideal world, all instructors of safety and health courses would be masters of course subject matter as well as the theories and practices for effective teaching. In practice, however, most instructors are much stronger in one or the other. This paper provides an example of how some fundamental knowledge from educational experts can be useful for improving a traditional safety course.

Is there a problem with the way traditional safety and health (S&H) courses are taught? It is asserted by this author that S&H education, in general, places too much emphasis on acquisition and comprehension of facts at …

The Effect Of Respirator Wear On Blood Lactate During Maximal Exertion, Austin Anderson, Fred Sullivan, Sally Bardsley, Roger C. Jensen

Safety Health & Industrial Hygiene

The impact of a filtering half-face respirator and a half-face supplied air respirator use on blood lactate production was assessed during maximal exertion to determine if anaerobic strain increased compared to no respirator use. Twenty-eight participants performed a 30 second cycling Wingate anaerobic test (WAnT) wearing a half-face respirator. Blood lactate production was measured to evaluate if there was an increase in anaerobic strain from wearing a tight fitting half-face respirator compared to wearing no respirator. A supplied air respirator WAnT was then performed using 18 participants from the first experiment to evaluate if supplied air decreased anaerobic strain. Data …

Strengthening A Traditional Fire Protection Course By Using Fault Trees, Roger C. Jensen

Safety Health & Industrial Hygiene

Traditional courses and textbooks in occupational safety emphasize rules, standards, and guidelines. This paper describes the early stage of a project to upgrade a traditional college course on fire protection by incorporating learning materials to develop the higher-level cognitive ability known as synthesis. Students will be challenged to synthesize textbook information into fault tree diagrams. The paper explains the place of synthesis in Bloom’s taxonomy of cognitive abilities and the utility of fault trees diagrams as a tool for synthesis. The intended benefits for students are: improved abilities to synthesize, a deeper understanding of fire protection practices, ability to construct …

Formats For Section Safety Messages In Printed Manuals, Roger C. Jensen, Erin Jenrich

Safety Health & Industrial Hygiene

This study compared four formats for safety messages in printed manuals based on layouts found in a new standard of the American National Standards Institute (ANSI Z535.6, 2006). These four designs are specifically for use as section safety messages. Two used a signal word panel, and two used a safety alert symbol (exclamation in a triangle). The four formats were rated by 55 college students from three different classes using a five-point scale for hazardousness. All four messages were presented on the same page of a test booklet, with order balanced using a Latin Square. Results of a Friedman test …

Risk Reduction Strategies: Past, Present, And Future, Roger C. Jensen

Safety Health & Industrial Hygiene

Several respected authors have proposed short lists of all strategies for controlling hazards or reducing risks from hazards. This article reviews those attempts and proposes an improved list of nine risk reduction strategies.

Materials-Handling Hazard Controls: Assessment Of Haddon’S Injury Control Strategies, Roger C. Jensen, P. Patton, J. Griffith, C. Hogan

Safety Health & Industrial Hygiene

This investigation assessed the applicability of Dr. William Haddon’s strategies for controlling hazards involving materials-handling operations in industrial and mining workplaces. Published over 20 years ago, Haddon’s strategies purport to include all strategies for preventing and mitigating harm to people, property, and the environment. Students in an undergraduate class were assigned to find tactical examples of each of Haddon’s strategies applicable to material handling. Haddon’s tenth strategy involving medical care and rehabilitation was not included. Their classifications were analyzed to identify points of confusion as well as points of general agreement. Students found numerous tactics for strategies involving engineering and …

Are Warnings On Plastic Films Adequate?, David S. Leonard, Roger C. Jensen, Tammy Lynn

Safety Health & Industrial Hygiene

Warnings are used to inform users of hazards that may be associated with many products. Often these warnings deal with the operation of tools, appliances, and other items for which the user may have some reason at least, to look for information on the product regarding its use. Plastic film presents a serious hazard to young children. Because the film will adhere to the flesh, if it covers the airways for the child, suffocation may result. Because young children may play with them, it is important that such films be kept away from them. Warnings need to be adequate to …

Safety Training: Flowchart Model Facilitates Development Of Effective Courses, Roger C. Jensen

Safety Health & Industrial Hygiene

Few SE&H professionals have time to keep up with the voluminous literature about safety and health training. An easier strategy involves adopting a model of the training process, such as the one described in this article. The model is presented as a flowchart to show the relationships among the component processes for all safet\' and health training. It is intended to be a flexible model, suitable for tailoring to organizational needs, and easy to conceptualize. By learning this model, SH&E professionals will have a solid understanding of Ihe processes involved in developing and implementing an effective safety training program.

Comparison Of Warning Labels On Plastic Bags, Tammy Lynn, Roger C. Jensen

Safety Health & Industrial Hygiene

Most plastic bags in our society contain a warning about the suffocation hazard, yet the U.S,. Consumer Product Safety Commission still receives approximately 24 reports annually describing deaths of children who suffocated due to plastic bags.

This study examined three of the warning features on plastic bags: (1) border versus no border, (2) position of the signal word relative to the text, (3) all capital letters versus sentence case. Ratings provided by more than fifty students indicated highly significant effects of the border on noticeability, and position and letter case on reading likelihood. Strongest effects were from presence of a …

Communicating Severity Of Hazard With The Signal Word On A Safety Sign, Roger C. Jensen, Andrew M. Mccammack

Safety Health & Industrial Hygiene

An experiment examined five signal words on safety signs for effectiveness at communicating information about severity of a hazard. Perceived severity was rated by 59 college students for the signal words Deadly, Danger, Warning, Caution, and Notice. Results indicated that Deadly communicated the highest ratings for severity. Danger was second. Warning and Caution were tied for third. The lowest ratings were for Notice.

Comparison Of Student Versus Employee Test Populations For Warning Sign Research Based On Severity Ratings For Signal Words, Scott Thomas, Roger C. Jensen

Safety Health & Industrial Hygiene

Most studies of warning signs involve undergraduate students as subjects. This paper reports a direct comparison of findings from an undergraduate population and an employed population. The 48 employed subjects from this study were compared with 59 undergraduate subjects from a companion study. Subjects from both populations were shown the same signs and asked to rate the severity level connoted by each sign. The signs differed only in signal word. Results for each population indicated that signal word had a highly significant effect on severity ratings. When the two populations were compared for ratings of each signal word, the only …

Severity Message From Hazard Alert Symbol On Caution Signs, Roger C. Jensen, Andrew M. Mccammack

Safety Health & Industrial Hygiene

Standards for the design of signal word panels specify different combinations of colors, signal words, and a hazard alert symbol. The warning sign standards of the American National Standards Institute specify a yellow signal word panel, with the word Caution and a hazard alert symbol, for signs marking people hazards. The same panel, without the symbol, is intended for property hazards. The purpose of this study was to determine if the presence or absence of the symbol effectively conveys the intended severity messages. A sample of 59 college students rated their impressions of a Caution sign with and without the …

Effectiveness Of Colors Used On Safety And Health Signs For Communicating Severity Of Injury, Andrew M. Mccammack, Roger C. Jensen

Safety Health & Industrial Hygiene

Signs are used extensively in workplaces and on products to identify hazards and provide instructions for appropriate behavior. A fundamental element of these signs is the signal-word panel located at the top of the sign. The colors and words in this panel are intended to convey information about the hazard identified. One type of hazard information concerns the severity of injury/illness associated with the hazard. The standard of the American National Standards Institute (ANSI) for facility signs uses three severity categories: 1) death or serious injury, 2) minor or moderate injury, and 3) property damage. The standard specifies which signal-word …

Case Study Of An Ergonomics Training Program For Nursing Home Workers, Roger C. Jensen

Safety Health & Industrial Hygiene

This paper describes a case study of a labor-based ergonomics-training program that makes use of some effective worker training methods. The program focus was on ergonomics awareness and back injury prevention for nursing home workers. It was developed and conducted by a not-for-profit organization affiliated with the Service Employees International Union. Training methods included the train-the-trainer model and the small group activity method. The investigation also compared the program components with those identified by the Occupational Safety and Health Administration (OSHA) as being key elements in effective safety training.

Safety And Health Sign Colors And Signal Words For Communicating Information On Likelihood And Imminence Of Threat, Roger C. Jensen, Andrew M. Mccammack

Safety Health & Industrial Hygiene

Signs are used extensively in workplace facilities and on products to identify hazards and provide instructions and safety information. A fundamental component of these signs is a signal-word panel located at the top of the sign. Certain colors and signal words in this panel are intended to convey information about a hazard, including likelihood of harm and imminence of the threat. The purpose of this study was to determine if young adults without prior training on safety signs associate signal words and color with likelihood of harm and imminence of the threat. The sample population consisted of 59 college students. …

Alertness-Supporting Activities For Control Room Operators In Automated Industrial Plants, Roger C. Jensen

Safety Health & Industrial Hygiene

A survey of control room operators in a nuclear power plant identified practical activities for maintaining alertness during the early morning hours. Nine on-duty operators rated 16 activities they were allowed to do on shift. Activities most effective for alertness were splashing cool water on the face, drinking coffee, and doing things that used muscles. The least effective activities were passive monitoring and studying for exams. The large range of ratings indicates that activity has a major role in operator alertness during the early morning hours.