Statistical Analyses for Occupational Exposure Results

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 [...]

Calculator: Minimum Sample Volume & Required Sampling Time

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 [...]

OHShub.com’s CIH Exam Prep Questions to Continue in June ’10

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 [...]

NTP (Normal Temperature & Pressure) Definitions

A few questions have arisen regarding the term NTP (Normal Temperature and Pressure).  The following table helps to sort any potential confusion.

Agency
Pressure
Temperature

Traditional

(Chemistry/Physics)
29.92 “Hg

760 mm Hg
492 ˚R

273 ˚K

ACGIH

(Ventilation)

29.92 “Hg

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. [...]

CIH Exam Prep Questions – February 2010, Part I

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, [...]

CIH Exam Prep Questions - January 2010, Part II

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 [...]

CIH Exam Prep Questions – January 2010, Part I

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. [...]

EBook Download: Fundamentals of Occupational Safety and Health

fundamentals_of_occupational_safety_and_healthNIOSH’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)

Continue reading EBook Download: Fundamentals of Occupational Safety and Health

Online Learning Module: Toxicology Tutor

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).

tox_tutor

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)

Continue reading Online Learning Module: Toxicology Tutor

December 2009 CIH Exam Prep Questions, Part II

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 [...]