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Re: E-M:/ sludge

David and Others,
The problem with the argument that "PCBs are ubiquitous" is that it ignores the fact that in Wisconsin, at least, 28 of 48 POTWs sampled did not have detectable PCBs in the sludge.  Ubiquity of contamination would imply similar levels across all the POTWs (or at least detectable levels).  I don't doubt that some PCB could probably be found in most sludges.  Its just that there is a range of contamination levels across the POTWs  which suggests sources other then ambient for many systems.  I see no reason to believe that Michigan POTW sludges are any different in magnitude or variation of contamination.
Dave Zaber
----- Original Message -----
To: dzaber@chorus.net ; enviro-mich@great-lakes.net ; rbodanyi@umich.edu
Sent: Friday, February 23, 2001 7:45 AM
Subject: Re: E-M:/ sludge

Here's the rub. If you research the subject of PCB's at all. What you will find is that PCB's in our world are now "ubiquitous". That means they are everywhere, literally. They are found, along with a soup of many other chemicals we consider toxic in low concentrations even in areas we consider to be pristine such as arctic wastelands where man has rarely ever set foot, and certainly has never manufactured anything, or lived. Airborne transport has seen to it that our repast has been transported over the entire planet. We live in a closed system. The question is, do we want to lock up the beneficial reuse of sewage sludges, for the low levels of PCB's that are contained in them? We could incinerate all of it I guess, but look at the loss of organics. This will not be able to be replaced. It will however add to the green house effect. Burying it will not help either. 
I guess my question is, I hear lots of bashing going on out there against "beneficial reuse", but what solutions do those bashing it offer in it's place that do not create only other problems?
>>> "David Zaber" <dzaber@chorus.net> 02/22/01 04:39PM >>>
So called "beneficial reuse" of sewage sludges has developed a large and dedicated following amoung POTW operators and regulatory agencies.  Its hard to find many voices against it.  A recent survey by Wisconsin DNR of POTW sludges found PCBs in a significant portion (levels available upon request).  Could Michigan POTWs have the same problem? 

The overapplication and nutrient issues is also clearly important.
Dave Zaber
----- Original Message -----
From: Spartacus
To: enviro-mich@great-lakes.net
Sent: Thursday, February 22, 2001 11:55 AM
Subject: E-M:/ sludge

Enviro-Mich message from Spartacus <rbodanyi@umich.edu>

Respectfully submitted,
I think it's important to note that even uncontaminated sludge poses
threats to the natural environment when over-applied, as it often is,
because excess nutrient runoff chokes local streams and rivers. This
phenomenon is particularly visible in the case of CAFO lagoon failure, as
happened with the New River in Virginia.

Ryan Bodanyi,
Student, University of Michigan

>Delivered-To: enviro-mich-outgoing@glc.org
>Delivered-To: enviro-mich@great-lakes.net
>Date: Thu, 22 Feb 2001 08:58:44 -0500 (EST)
>From: Karen Griggs <kgriggs@kettering.edu>
>To: joonmck <joonmck@gateway.net>
>Cc: enviro-mich@great-lakes.net
>Subject: E-M:/ sludge
>Organization: Kettering University (formerly GMI E&MI) - Flint MI
>Sender: owner-enviro-mich@great-lakes.net
>Reply-To: Karen Griggs <kgriggs@kettering.edu>
>List-Name: Enviro-Mich
>X-Loop: enviro-mich
>Enviro-Mich message from Karen Griggs <kgriggs@kettering.edu>
>Dear colleagues,
> Not all sludge contains all those chemicals. Land application of treated
>wastewater and sludge are good technologies in harmony with nature,
>provided that industrial pre-treatment has resulted in high quality
>effluent or good sludge that will bio-degrade.
>Karen Griggs
>ENVIRO-MICH:  Internet List and Forum for Michigan Environmental
>and Conservation Issues and Michigan-based Citizen Action.   Archives at
>Postings to:  enviro-mich@great-lakes.net      For info, send email to
>majordomo@great-lakes.net  with a one-line message body of  "info

ENVIRO-MICH:  Internet List and Forum for Michigan Environmental
and Conservation Issues and Michigan-based Citizen Action.   Archives at

Postings to:  enviro-mich@great-lakes.net      For info, send email to
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