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Copper and Lead in the Sewers

Has anyone done a survey of industries that may be present in a smaller
town (e.g., automobile repair) that may be responsible for elevating levels
of copper and lead in a small sewage treatment plant discharge?  I know
that mercury, molybdenum, cadmium, silver and certain organics have been
tracked to specific source.  Is there a publication on sources for copper
and lead?  Thank you.


Dr. Robert B. Pojasek 
Pojasek & Associates 
P.O. Box 1333 
E. Arlington, MA 02474-0071
(781) 641-2422 
(617) 788-0288 (FAX)