RE: Hazardous vs. Radioactive Materials PAHs

["Richard F. Orthen" <rorthen@EARTHSCIENCES.NET>]

More correctly, in The Report on Carcinogens, Tenth Edition (RoC; December

2002), the National Toxicology Program (NTP) lists 15 PAH's as "reasonably

anticipated to be human carcinogens based on sufficient evidence of

carcinogenicity in experimental animals."  See the PAH section of the RoC at

http://ehp.niehs.nih.gov/roc/tenth/profiles/s150pah.pdf.  Perhaps more

interesting is exposure to wood dust, broad spectrum UV radiation, alcoholic

beverages, and steroidal estrogens, all of which are listed "known to be a

human carcinogen."  [The RoC does not provide quantitative carcinogenic risk

assessments, relegating that task to regulatory agencies.] Three

heterocyclic amines found in cooked meat and fish as well as X- and gamma

radiation and neutrons have been nominated for possible listing in the next

(eleventh) edition of the RoC.  Any weekend dragster/funny car race

spectators out there beware: nitromethane is in the RoC listing queue too.





Richard F. Orthen  CHMM

Sr. Project Manager

Earth Sciences Consultants, Inc.

One Triangle Lane

Export, PA  15632

724/733-3000

rorthen@earthsciences.net

-----Original Message-----

From:	owner-radsafe@list.vanderbilt.edu

[mailto:owner-radsafe@list.vanderbilt.edu] On Behalf Of M Nivas

Sent:	Tuesday, March 11, 2003 11:38 AM

To:	radsafe@list.vanderbilt.edu

Subject:	Hazardous vs. Radioactive Materials PAHs



Polyaromatic hydrocarbons (PAHs) are background

hazardous molecules. They are considered cancer

causing compounds.



These compounds are formed from natural incomplete

combustion (brushfires, forest fires, lightening).



Some people at the The United States Environmental

Protection Agency insists that they are not

background.  Obviously they do not pay attention to

all the brush fires in North America and Austrailia.



Tom







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