If [...]]]> NIOSH released a guide, Occupational Exposure Sampling Strategy Manual (1977), that describes statistical analyses for occupational exposure results in a clear and concise manner. Included are discussions and examples on:

• Confidence Limits (CL’s)
• CL’s and Compliance / Non-compliance Classifications
• Statistics and Classifications for: full period sampling, partial period sampling, consecutive sampling, grab sampling, comparison to ceiling standards, and more.

If you are looking for a (free) guide that details “real world” occupational exposure statistical analyses, download NIOSH’s guide HERE (NIOSH Occupational Exposure Sampling Strategy Manual (37)).

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Want to determine the Minimum Sample Volume needed to ensure you collect enough of a sample volume so that the results are capable of being less than the Exposure Limit? Want to know how long you need to sample at a given flow rate?

If so, use OHShub.com’s Minimum Sample Volume and Required Sampling Time calculator [...]]]>

Want to determine the Minimum Sample Volume needed to ensure you collect enough of a sample volume so that the results are capable of being less than the Exposure Limit? Want to know how long you need to sample at a given flow rate?

If so, use OHShub.com’s Minimum Sample Volume and Required Sampling Time calculator and take the guess-work out of the equation.

Input the:

• Laboratory Limit of Quantitation (LOQ)
• Exposure Limit
• Desired Fraction of the Exposure Limit (essentially a safety factor for sampling)
• Sampling Rate

And the results will give you the Minimum Sample Volume and Required Sampling Time.

Note:  Ensure that you have the right units and all of the units are consistent.  Units such as parts per million (ppm) for Exposure Limits may need to be converted to mg/m3.

Download the Calculator HERE: (Calculator: MSV & RST (96))

In the meantime, be sure to check out the over 250 questions that OHShub.com currently offers to use in [...]]]> OHShub.com will be taking a short leave from posting examination preparation questions for the Certified Industrial Hygienist (CIH) exam.  Questions will resume in June 2010 after the Spring American Board of Industrial Hygiene (ABIH) exam window has closed.

In the meantime, be sure to check out the over 250 questions that OHShub.com currently offers to use in your study efforts.    Additionally, be sure to stay tuned to OHShub.com as some new and exciting examination preparation materials will soon be available.

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(Chemistry/Physics) 29.92 “Hg

760 mm Hg 492 ˚R

273 ˚K ACGIH

(Ventilation)

760 mm Hg 530 ˚R

294 ˚K NIOSH/AIHA

(Traditional) 29.92 “Hg

760 mm Hg 537 ˚R

298 ˚K ASHRAE

(Ventilation) 29.92 “Hg

760 mm Hg 528 ˚R

293 ˚K

Source: Useful Equations, Practical Applications of OH&S Match: D. [...]]]> A few questions have arisen regarding the term NTP (Normal Temperature and Pressure).  The following table helps to sort any potential confusion.

Source: Useful Equations, Practical Applications of OH&S Match: D. Jeff Burton, PE, CIH

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The latest CIH exam prep questions have been posted to OHShub.com. You can find these 25 questions covering a wide range of IH topics HERE.

We told you to sharpen those math skills, this entry in the OHShub.com bi-monthly CIH Exam Preparation Questions is all math. Sharpen those pencils, bring out the calculator, [...]]]>

The latest CIH exam prep questions have been posted to OHShub.com. You can find these 25 questions covering a wide range of IH topics HERE.

We told you to sharpen those math skills, this entry in the OHShub.com bi-monthly CIH Exam Preparation Questions is all math. Sharpen those pencils, bring out the calculator, grab a cup of coffee and get going!

Please note: OHShub.com has made the questions and solutions much easier to read. Check out our improvements!

Please leave your results in the poll in the left sidebar. Thanks & Good Luck!!!

The latest CIH exam prep questions have been posted to OHShub.com. You can find these 36 questions covering a wide range of IH topics HERE.

This entry is math free!  Better sharpen those math skills for February!

Please note: OHShub.com has made the questions and solutions much easier to read. Check out [...]]]>

The latest CIH exam prep questions have been posted to OHShub.com. You can find these 36 questions covering a wide range of IH topics HERE.

This entry is math free!  Better sharpen those math skills for February!

Please note: OHShub.com has made the questions and solutions much easier to read. Check out our improvements!

Please leave your results in the poll in the left sidebar. Thanks & Good Luck!!!

The latest CIH exam prep questions have been posted to OHShub.com. You can find these 30 questions covering a wide range of IH topics HERE.

Please note: OHShub.com has made the questions and solutions much easier to read. Check out our improvements!

Please leave your results in the poll in the left sidebar. [...]]]>

The latest CIH exam prep questions have been posted to OHShub.com. You can find these 30 questions covering a wide range of IH topics HERE.

Please note: OHShub.com has made the questions and solutions much easier to read. Check out our improvements!

Please leave your results in the poll in the left sidebar. Thanks & Good Luck!!!

Some of the chapters in the book include such topics as:

(Continue reading past the break for a [...]]]> NIOSH’s Twitter feed (@NIOSH) recently “tweeted” about the availability of an ebook entitled, Fundamentals of Occupational Safety and Health, written by Mark Friend and James Kohn (2007).

Some of the chapters in the book include such topics as:

• Workers’ compensation and recordkeeping
• Accident investigation
• Intro to Industrial Hygiene
• Ergonomics
• System Safety
• Hazardous Materials,
• Multiemployer worksite doctrine
• Required written programs
• etc.

(Continue reading past the break for a download link to the book)

Great reference material for the practicing Health & Safety professional!

A copy of the book can be downloaded here: (Fundamentals of Occupational Safety and Health (220))

or via File2Box.com

Source: @NIOSH (via Twitter)

Great information for those interested in toxicology, studying for the CIH examination, or as a general refresher.

(Continue reading for download links and [...]]]> The National Library of Medicine has produced a three-part series to educate individuals on the basic principles of toxicology.  You can go through the tutorials online or download on your computer (see download links below).

Great information for those interested in toxicology, studying for the CIH examination, or as a general refresher.

(Continue reading for download links and a link to the online module)

Part I (download ToxTutor Part I (121))

Toxicology Tutor I is the first in a set of three tutorials on toxicology produced by the Toxicology and Environmental Health Information Program of the National Library of Medicine, U.S. Department of Health and Human Servicess. It covers Basic Principles of toxicology and is written at the introductory college student level. The Toxicology Tutors are intended to provide a basic understanding of toxicology as an aide for users of toxicology literature contained in the National Library of Medicine’s Chemical and Toxicological databases. Toxicology Tutor II covers Toxicokinetics while Toxicology Tutor III will pertain to Cellular Effects and Biochemistry.

Part II (download ToxTutor Part II (64))

Toxicology Tutor II is the second of three toxicology tutorials being produced by the Toxicology and Environmental Health Information Program of the National Library of Medicine, U.S. Department of Health and Human Services. Toxicology Tutor I covered basic principles of toxicology while Toxicology Tutor II presents toxicokinetics. These tutors are written at the introductory college student level. They are intended to provide a better understanding of the toxicology literature contained in the National Library of Medicine’s Chemical and Toxicological databases.

Part III (download ToxTutor Part III (67))

Cellular Toxicology is the third tutorial on toxicology produced by the Toxicology and Environmental Health Information Program of the National Library of Medicine, U.S. Department of Health and Human Services. This tutorial covers the basic toxic mechanisms that operate at the cell level which includes those that interfere with normal biochemical functions. While the study of cells and biochemicals is immensely complex, our intent is to present this subject in terms and concepts that is understandable to introductory college students. These Toxicology Tutorials are intended to help students understand the toxicology literature contained in the National Library of Medicine’s Chemical and Toxicological databases.

Click HERE to go to the online module.

The latest CIH exam prep questions have been posted to OHShub.com. You can find these 30 questions covering a wide range of IH topics HERE.

Please note: OHShub.com has made the questions and solutions much easier to read. Check out our improvements!

Please leave your results in the poll in the left sidebar. Thanks [...]]]>

The latest CIH exam prep questions have been posted to OHShub.com. You can find these 30 questions covering a wide range of IH topics HERE.

Please note: OHShub.com has made the questions and solutions much easier to read. Check out our improvements!

Please leave your results in the poll in the left sidebar. Thanks & Good Luck!!!