Digest 1D. Re: THE RIGHT TO HEALTHY INDOOR AIR

[Guest guest]

Barb:

(and given your previous inability to respond to any of my questions, I'll

presume this is only really for others to absorb, not for you to actually

reply)

1. You stated:

" WHO actually set limits for residential levels of toxicants while the

US government merely concentrated upon work environments and levels of

releases from industry in communities (now undisclosed). "

Response:

a. It's easy to say what you want to when you are not paying for the

" fix " you suggest or even your own research.

b. If you used all of the WHO's premises, you'd have to get rid of

employees for being irritating and several foods for their natural

constituents. HUUUUM. Maybe that is a good idea.

2. You stated:

" It makes no sense to determine at what point a normal, healthy adult male

will become ill upon exposure to a pure substance under lab

conditions. Reliance upon that same level of exposure when

introducing toxicants into ambient environments, cannot be controlled

for dosage actually received. You can control for the amount

introduced to an environment but not its persistence, cumulative

effects of the multiple routes of absorption (inhalation, ingestion,

dermal absorption etc), combinatorial factors of multiple exposures

occurring simultaneously, and the altered ability of the individual to

continue tolerating the stress of exposure over time as toxicity

effects diminish defenses and cause transient/permanent forms of damage. "

Response:

a. All risk assessments (that I know of) are now performed based on

Exposure Assessments, not just dose-response calculations. This ranges from

TMDLs to use of biocides in paints. Bioaccumulation is looked at. I

recently looked at some data on bioaccumulation from a naturally extracted

product (in food) that (in theory) accumulates in the ecosystem and the

regulating body wanted to restrict it's use (despite the fact that is, has,

and hopefully always will be naturally present in the environment without

any real signs of accumulation).

b. So Barb, how do you propose we estimate and manage risk from various

agents (not that I actually expect a response; but it isn't really criticism

if you only offer complaints, it's just grumbling negativism to soothe one's

ego)?

Tony

.......................................................................

" Tony " Havics, CHMM, CIH, PE

pH2, LLC

5250 E US 36, Suite 830

Avon, IN 46123

www.ph2llc.com

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90% of Risk Management is knowing where to place the decimal point...any

consultant can give you the other 10%(SM)

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