Here's what the experts are saying:
an AIHA Accredited Laboratory to manufacture each of our passive dosimeter monitors and they also perform all of the analysis
on each of the exposed monitors. This provides each customer, as well as your employees, the confidence that the reporting
is accurate and within the OSHA and NIOSH standards.
Laboratory has been reaccredited by The American Industrial
Hygiene Association (AIHA) for another 3 year period beginning in 2002. This comes after evaluation of our quality assurance
procedures and after an on-site inspection.
The American Dental Association (ADA) has evaluated the accuracy of
RTP's nitrous oxide badges. Their data indicates that our monitoring badge is accurate. Monitoring badges from two other companies
are found to not be acceptable.
In January, 2000 and again in July, 2001 an independent validation study by a Japanese
government agency found that our Formaldehyde/Glutaraldehyde Vapor Monitor badge and the ones for benzene, toluene, xylene
and styrene are significantly more accurate than required by US OSHA standards.
In August, 2001 the labs quality
assurance procedures were examined on-site by an inspector from New York State Department of Health as part of the renewal
for our Environmental Laboratory Approval Program accreditation.
In February, 2002 we were granted a Patent by
the Government of Japan for technology used in the monitoring badges. This supplements a previous U.S. Patent.
Who needs to monitor?
Why should I monitor?OSHA General Duty Clause: Each employer shall furnish to each of his
employees a place of employment which is free from recognized hazards that are causing or likely to cause death or serious
physical harm to his employees...
- Dental Offices
- Dry Cleaners
OSHA "Right to Know" - CFR 1910.1200 Appendix E Subpart Z The Hazard
Communication Standard (HCS) - Employees have both a need and a right to know the hazards and identities of the chemicals
they are exposed to when working. They also need to know what protective measures are available to prevent adverse effects
from occurring... When employers have information about the chemicals being used, they can take steps to reduce exposures,
substitute less hazardous materials, and establish proper work practices. These efforts will prevent the occurrence of work
related illnesses and injuries caused by chemicals...
reasons to monitor•OSHA 29 CFR 1910.1450, "Occupational Exposure to Hazardous
•OSHA CFR 1910.1000 "Air Contaminants Z-1 Table"
•JCAHO "The Environment of Care Standards and Scoring Guidelines"
Manual for Hazardous Materials and
Waste Management (EC2.4)"
•CDC NIOSH Alert "Request
for Assistance in Controlling Exposure to Nitrous
Oxide Anesthetic Administration"
- National Institute for Occupational Safety and Health
"Recommended Exposure Limits"
•ACGIH - The American Conference of Governmental Industrial Hygienists
and BEI's Guidelines"
When should I re-monitor?
•Employee changing patterns of movement in the workplace
•Closing of facility
doors or windows
•Changes in ventilation from season to season
•Decreases in ventilation efficiency
or abrupt failure of engineering
•Changes in the production process or work
habits of the employees
•Spill or leak occurrencesMemberships/AffiliationsRTP holds memberships and affiliations in the following:
• American Conference of Governmental Industrial Hygienists -ACGIH
• The Laboratory is Accredited
by the American Industrial Hygiene Association-AIHA What you will receive:•Dosimeters are available in any
quantity that you require and are priced based on the volume that is purchased- call for a quote
toll free 866-382-4694
•One price covers both badge and analysis
meet and exceed OSHA Requirements
•All badges designed and analyzed using OSHA and NIOSH
•All badges can be used as TWA or STEL
•All badges may be stored in ambient
•Standing order programs available
•Rush analysis performed upon request
•Analysis recovery is best when performed closest to exposure date
•Quality control info available
•Independent documentation and Confidentiality
•Results determined within 7 working
days Dosimeters Available: •
Please contact our office if
you require a monitor for a chemical not shown on our list; others may be available.•
a wide range of monitors listed below However, if you require a monitor for a chemical that is not shown, please call us toll
free at 866-382-4694
to determine if one is available.
N-Butyl Alcohol (Skin)
Ethyl Alcohol (Ethanol)
Ethyl Butyl Ketone
Methyl Alcohol (Methanol)
Methyl Ethyl Ketone
Methyl Isobutyl Ketone
Methyl Propyl Ketone
** This is a partial list
please Contact Us for requests.
Quality Control and Internal ValidationAn unexposed "Blank" badge is stored and always
tested with each group positive results. Monitoring badges exposed to known concentrations of the vapors are also analyzed.
This gives a "built-in" validation standard of accuracy. A statement of the accuracy can, therefore, be given on
each analysis report. Calibration standards are generally traceable to the U.S. National Bureau of Standards. Monitors are
calibrated in a specifically designed chamber, with continuous measurement of the vapor concentration. Analysis results are
evaluated in terms of the Coefficient of Variation (CV) and the Overall System Accuracy. OSHA usually requires accuracy of
+/- 25% with 95% confidence limits. Overall System Accuracy accounts for both accuracy and precision.
Independent Validation of AccuracyAccuracy
of AnalysisAs part of the accreditation requirements, the laboratory participates in the NIOSH
Proficiency Analysis Testing (PAT) Program. In this program, samples are submitted to the laboratory each calendar quarter.
These samples include passive monitoring badges. The chemicals in recent proficiency testing include toluene, xylene, benzene,
chloroform, methanol, trichloroethylene and others. The lab has reported accurate results in all 24 tests in the recent past
and is rated proficient.Independent Validation of Monitoring Badge
PerformanceThe Company welcomes opportunities for other organizations to evaluate the performance
of the monitoring badges. Recent results are reported below.
Formaldehyde and Glutaraldhyde
|OSHA PEL = 0.75
OSHA STEL = 2.0 ppm
OSHA Action Level = 0.5 ppm
|(0.75 ppm for 8 hours = 6 ppm
(2.0 ppm for 15 minutes = 0.5 ppm x hr)
(0.5 ppm for 8 hours = 4 ppm x hr)
The monitoring badges were exposed by the Mitsubishi Chemical Company in a program sponsored
by the Government of Japan. United States OSHA requires that the accuracy be better than 25% at the PEL and 35% at the STEL.
The accuracy is reported for exposures measured in ppm x hr. The OSHA PEL of 0.75 ppm for an 8 hour period corresponds
to 6.0 ppm x hr. The STEL corre- sponds to 0.50 ppm x hr. The range reported below includes these limits
Nitrous OxideThe American Dental Association (ADA)
has a continuing concern about the exposure of dental workers to nitrous oxide. They evaluated monitoring badges provided
by several suppliers. The results were compared to those obtained with calibrated infrared absorption instruments. In a report
published by Fan, Batchu, Miaw and Sandrik, they concluded that this monitoring badge is the only accurate badge available
for measurement of personal exposure to nitrous oxide. Six samples were at each concentration. The ADA reported results over
a wide range of concentrations and are tabulated below.
Coefficient of Variation
|0.53 ppm x hr|
0.72 ppm x hr
1.4 ppm x hr
2.4 ppm x hr
3.4 ppm x hr
6.1 ppm x hr
|NO Concentration (ppm)||Monitoring Badge Analysis (ppm)|
Benzene, Toluene & XyleneThese tests were also done by The Mitsubishi Chemical Co., with monitoring badges provided to them. The exposed
badges were shipped to the laboratory in for analysis. (These results are a corroboration of many tests that show no deterioration
of the samples due to shipping.)
Average = 13.33 ppm
C.V. = 0.039
Overall system Accuracy = 12.8%
Average = 14.9 ppm
C.V. = 0.0207
Overall system Accuracy = 7.3%
Average = 11.81 ppm
C.V. = 0.022
Overall system Accuracy = 15.4%
tests with the xylene monitor badge were performed by The Institute of Occupational Safety & Health, Ministry of Labor,
State of Israel. These were field samples collected simultaneously by monitoring badges and sampling pumps with charcoal tubes.
The reference method in the table below is the tube results.
Validation StudiesIn addition to the independent validation studies, the laboratory has
a contin- uing program to evaluate the accuracy of the monitoring badges. The results can be provided for other chemicals
not listed above.
Monitoring Badge (ppm)
Qualitative and Quantitative ResultsMany vapors can be captured in one all purpose badges known as SVOC (semi-volatile organic compounds). These
compounds are composed primarily of carbon and hydrogen atoms with boiling points greater than 200 C0 and can be collected
by compatible media. Industries utilizing processes that require multiple exposures to these compounds, in varying degrees,
seek both qualitative and quantitative results from a monitoring badge.