What is the calculated twa

Assignment Help Other Subject
Reference no: EM131216105

Question 1

You are an industrial hygienist conducting personal sampling on a worker who is overseeing a production process involving use of acetone (Note: The Occupational Safety and Health Administration has established a Permissible Exposure Limit of 1000 parts per million (ppm) of acetone). You are able to measure the following exposures:

700 ppm for 3 hours

1300 ppm for 2 hours

900 ppm for 3 hours

What is the calculated TWA? What would you tell plant management in terms of exposure to acetone and compliance with the PEL?

Question 2

Please solve the following problem, indicating your response on a Word document and submitting the document via File Upload.

Using the following formula, solve the problem below, and show your work.

(TWA = CaTa + CbTb + ... + CnTn) / 8

TWA = Time-Weighted Average
Ca = Concentration of contaminant during the sampling period "a"
Ta = Time of sampling period "a"
Cb = Concentration of contaminant during the sampling period "b"
Tb = Time of sampling period "b"
Cn = Concentration of contaminant during the sampling period "n", where "n" is the last of a series of contaminants
Tn = Time of sampling period "n"

Note: All concentrations are in parts contaminant per million parts of air or milligrams of contaminant per cubic meter of air.

Air Sampling Problem: You are an industrial hygienist that is conducting personal sampling on a worker who is overseeing a production process involving use of toluene (Note: The Occupational Safety and Health Administration has established a Permissible Exposure Limit of 200 parts per million (ppm)). You are able to measure the following exposures:

500 ppm for 1 hour

100 ppm for 4 hours

225 ppm for 3 hours

What is the calculated TWA? What would you tell plant management in terms of exposure to toluene and compliance with the PEL?

Reference no: EM131216105

Questions Cloud

Can a collaboration of educations exist : Can a collaboration of educations exist? If so, how? If the decision is made to increase focus, funding, and new hiring for professional and technical fields will this decrease morale for the staff who teach liberal arts?
Examine the spectra of the modulated signals : Develop the demodulation circuit corresponding to Illustration 154. Rectification should be shown by the „absolute value" process (module "arithmetics"), the RC circuit by lowpass filtering. See also Illustration 155
How much will whole company profitability increase-decrease : Stanco Inc. has two divisions, Electronics and Clocks. The Electronics Division (which is operating at capacity) , makes a specialized circuit borad called SA5 which it sells to its regular customers for $14 each. Suppose the total demand for the new..
Draw a graph of composite profile and find junction depth : Draw a graph of the composite profile and find the junction depth(s) if the phosphorus background concentration is 10 1 6 /cm3.
What is the calculated twa : What is the calculated TWA? What would you tell plant management in terms of exposure to acetone and compliance with the PEL?
Determine the effects of executives proposed changes : Ralph Industries is experiencing lower than expected sales. The company’s executives agreed that in order to make up some of the lost revenue’s impact on the bottom line, expenses must be lower. Determine whether the proposed change in assets’ useful..
Develop an am generator by means of the module : Develop an AM generator by means of the module "formula interpreter" which implements the AM formula given on page 236 and with which the degree of modulation m, fLF and fcarrier can be set. Select ÛLF = 1 V
How is the input parameter of measurement system done : How is the input parameter of measurement system done? - Show the input.  - Show the output.  - Show the other parameters.
Identify new questions you have now that you have discovered : Identify new questions you have now that you have discovered more about the issue. Explain how you might apply the critical analysis and research skills you have been practicing this week to your student and professional roles.

Reviews

Write a Review

 

Other Subject Questions & Answers

  Combination of policy instruments

The marketing mix can be described as a particular combination of policy instruments that are integrated to form a certain marketing strategy that will enable a transport enterprise to compete in a particular segment''

  Defined compensation programs from defined benefit programs

In the United States, we have seen a trend towards defined compensation programs from defined benefit programs. Many employers have moved in this direction to help them be more competitive. What are some reasons that these benefit programs are offere..

  Evaluation of personal feelings

Emotional intelligence plays a major factor when communicating with others as emotions often take control. Evaluation of personal feelings and recognizing others emotional cues will help to resolve issues that are hindering motivation and goal att..

  How to discover a way to restructure sentence

Discover a way to restructure this sentence? "For example, suppose a conversation in which the person attempts to convince her/his friend not to register for an online higher education.

  Analyze key reasons why third parties have never successful

Analyze key reasons why third parties have never been successful at the presidential level. Determine the role of the campaign process in maintaining the two-party system. Use examples to support your response.

  Learning theories and principles

What learning principles form the core basis for your teaching? Which new learning principles interest you, and how will you apply them in your teaching? Which of these might form the basis for teacher research?

  What motivates people to volunteer

What motivates people to volunteer? Do you perceive it as an act of social conformity? 150 words or more response

  Media plays a big role in the health care system

The media plays a big role in the health care system. Do politicians use the media to highlight only the good or bad parts in order to persuade the public who do not have immediate access or knowledge of the proposed acts?

  What make regulation important aspect of every day operation

Evaluate the 49 CFR, what makes this regulation an important aspect of day-to-day operations? What would happen without it?

  Is there a binding contract to build the road

The contractor agrees that he is fully informed regarding all the conditions affecting work to be done and labour and materials to be furnished for the completion of the contract and that his information was secured by personal investigation and r..

  Example of thinking with verbal concepts

Some thinking depends on verbal concepts, while another kind of thinking involves. Which of these activities is not an example of thinking with verbal concepts?

  Flashblub memory fundamentals

Illustrate your thoughts on the content of this discussion below as it relates to Flashblub Memory? Do you agree or disagree? Why

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd