The following message is from Nancy Helm.
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I don't have any specific information on this process, but the
Oregon Department of Environmental Quality recently
developed a manual on pollution prevention and POTW's.
The printing industry is one of those on which they focused.
The manual looks to me like it has the kind of information
that would be helpful in analyzing this problem. For more
information contact the ODEQ P2 coordinator, Marianne
Fitzgerald, 503 229-5946.