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Re: E-M:/ ABC News.com Manure Blamed for killing fish



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Enviro-Mich message from "Alexander J. Sagady" <ajs@sagady.com>
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At 09:50 AM 03/05/2005, Janet Kauffman wrote:

A thaw Friday sent the waste running into the stream, said Michael Sorge, a water resources specialist with the state Department of Natural Resources. He said the trout were killed by ammonia from the manure. ...

Speaking of ammonia (unionized), I've just discovered that Michigan's water quality standard
for ammonia for both coldwater trout species and warmwater is significantly less
stringent than analogous standards in New York.


Michigan doesn't vary its permissible ambient water quality standards for unionized ammonia
by pH and temperature like some other states do (as does NY).


For example, for receiving waters at pH 6.75, Michigan allows between 8.8 and 24 times
more ammonia (unionized) as acceptable water quality for cold water trout streams as does NY, depending
on the temperature of the receiving waters......for aquatic chronic exposures.


For warm water fisheries under the same assumptions, Michigan allows between 11.3 to 44 times
as much unionized ammonia as does NY....for aquatic chronic exposures.


For acute fish survival exposure, at pH 7.00, Michigan allows between 1.2 and 7 times as
much acute exposure unionized ammonia as NY and between 1.6 to 9 times as much
un-ionized ammonia for warm water fisheries acute exposures.


Michigan doesn't vary the permissible exposures to unionized ammonia by ambient
water pH and temperature as other states do. Michigan last revised its ammonia
water quality standards in 1997 during the Engler Administration before EPA announced
a revision in its view of ammonia water quality standards.


Alex Sagady
Environmental Consultant




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Environmental Enforcement, Permit/Technical Review, Public Policy,
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Prospectus at:  http://www.sagady.com/sagady.pdf

PO Box 39,  East Lansing, MI  48826-0039
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