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Re: dioxin fingerprints
I haven't read much about POTWs. There is a little
on the Web about
contaminants going in and out.
But here's some raw data (if you'll pardon the
expression) that might
1. If chlorine is used by the POTW, then it will, of
with the organics in wastewater to form dioxin and
organochlorines (notably TCE).
2. Commercial and industrial users of POTWs use a
tremendous amount of dichlorobenzene as a
disinfectant (the white or blue tablets of
stuff in almost all urinals.) Dichlorobenzene, because
its chemical structure and origin, is very likely
with dioxins, furans, and/or PCBs. The treatment of the
wastewater, depending on what it is, may enhance the
production of those by-products. Additional
may be added directly to commercial drains in liquid
it is sold in 55-gallon drums(!).
3. Community use of ordinary chlorine bleach may
contribute significantly to dioxin in wastewater.
Dishwasher detergents have chlorine bleach as
an ingredient, chlorine bleach is used directly in
restaurants and other public places for disinfection,
and gallons of it are used by most people who
own clothes washers.
4. POTWs are a common dumping ground for
small businesses who can't deal with environmental
regs. How many pesticide applicators and lawn
care companies are connected? How do they
handle the cleaning of their equipment? Do they
properly dispose of unused liquids when, for
instance, they get a request for a non-pesticide
Have you checked all the incoming waste streams for
I hope this is helpful...
From: Jamie Harvie <firstname.lastname@example.org>
To: Multiple recipients of list
Date: Tuesday, August 05, 1997 3:20 PM
Subject: dioxin fingerprints
I have been involved in dioxin sampling at our POTW. We
have sampled all
industry effluent, including a local Pulp Mill ( even
leachate from its'
landfill). The detection limit was around 1 ppt and we
had no "hits" (except
a few OCDDs, and 250 ppt of PeCDD in a Parks department
pesticide), yet our
wastewater sludge ranges from 2-4 ppt. I was wondering
if I could tell what
our dioxin source is, based on its' fingerprint. Does
anyone have experience
they could share?
2626 Courtland St.