Review Test Submission: Chapter 6
Compare and contrast incidence rate , prevalence rate and Standardized mortality/morbidity
An incident rate the number of new cases of disease in the population divided by the total
person-time in the po
Discuss how Occupational Hygienist handling of Temperature and Pressure effects
differs from that of other disciplines.
OELs and environmental standards are expressed at 25C and 1 atm (760 mmHg).
Data should be corrected to the NTP condition at which the
1. Describe how a rotometer works and list its limitations.
This device consists of a float that is free to move up and down within a vertical tapered tube
that is larger at the top than the bottom. Some of the shaped floats achieve stability by having
Pressure exerted by a vapor against the
sides of a closed container.
Based on material and temperature
As temperature increases so does the VP
The lower the boiling point a greater vapor
pressure will be exerted at a given
Convert ppm to mg/m3
X (ppm) = (Y (mg/m3) x (24.45) / Molecular Weight
X (mg/m3) = (MW x (Y (ppm) / 24.45
MW-The sum of the atomic weights of all atoms in a
l The number 24.45 in
Originally published in The Synergist May 2005.
Industrial Hygiene, Lobbying and Ethics
By Lamont Byrd
John, a CIH, is the senior corporate industrial hygienist for a large corporation that has facilities
throughout the United States and several in Asia a
Originally published in The Synergist in May 2006
Dust Exposures at Alabama Ore and Acids
Monitoring, science and company politics
By Joseph B Baker
Before its conversion into a Wal-Mart parking lot, the Alabama Ore and Acids plant provided
An Ideal Gas is modeled on the
Kinetic Theory of Gases which has 4 basic
Gases consist of small particles
(molecules) which are in continuous random
The volume of the molecules present is
negligible compared to the total volume
ASBESTOS and OTHER FIBERS by PCM 7400
FORMULA: VariousMW: VariousCAS: see SynonymsRTECS: Various
METHOD: 7400, Issue 2
OSHA: 0.1 asbestos fiber (> 5 m long)/cc; 1 f/cc, 30 min
MSHA: 2 asbestos fibers/cc
PARTICULATES NOT OTHERWISE REGULATED, TOTAL 0500
DEFINITION: total aerosol massCAS: NONERTECS: NONE
METHOD: 0500, Issue 2
OSHA: 15 mg/m
NIOSH: no REL
ACGIH: 10 mg/m, total dust less than 1% quartz
Issue 1: 15 February 1984
Issue 2: 15
Originally published in The Synergist in September2007: The Ambitious Professional
What You Dont Know Can Hurt, by John Burke
Jane Richards, CIH, left Friday the interview really hoping she would be selected for the new
assignment within her company, the
Originally published in The Synergist October 2005.
Coping with Change: Will this IH Sink or Swim?
by AAron Chen
Jim has now been out of school for six years. After receiving his dual MS/MSPH agreeing from
HiLee Accredited University, Jim received numerou
Originally published in The Synergist in December 2002
Sick of ethics? By Liz Gross
John is a CIH working at a university. He teaches industrial hygiene to undergraduate students,
and has a consulting practice on the side. He finds this to be quite reward
Describe the tiers of modeling estimating techniques and explain the advantages and
disadvantages of each.
Tier 1 Known as the saturation, or zero ventilation, model, this approach is the simplest.
Basically the IH calculates the maximum possible volume o
Describe mechanisms by which an industrial hygienist can improve their professional judgment.
1. Use statistical analysis tools to evaluate monitoring results whenever data are available
for an exposure assessment. Statistical tools inform the judgment by
Distinguish between the three chromatographic techniques (GC, HPLC, and IC) used in the
analysis of vapors and gases.
Gas Chromatography (GC)- GC provides a powerful tool for the analysis of low concentration air
contaminants and airborne organic compound
1. Define quality control chart and state its functions.
Quality control charts are created to monitor the state of control of analytical processes. This
requires the development of two control charts, one for monitoring bias (variance due to
OSHA- Occupational Safety & Health Administration
USPHS- United States Public Health Service
NIOSH- National Institute for Occupational Safety & Health
ACGIH- American Conference of Governmental Hygienists
TLV- Threshold Limit Values
MSHA- Mine Safety and
1. Imminent danger situationshazards that could cause death or serious physical harm
receive top priority. Compliance officers will ask employers to correct these hazards immediately
or remove endangered employees.
2. Fatalities and catastrophesincidents
How does the IH determine what the results mean and what actions need to be taken based on
The initial step is to calculate airborne concentrations from the raw data provided by the
analytical lab (if the lab does not already provide this). The c