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4 937
COSMOPOLITAN ENGINEERING GROUP
Westside WWTP Mixing Zone Study and Analysis
Waste Water
LEG 12-1
9/14/2009
12/31/2010
1/1/2011
Comments :
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PUBL/C WORKS & UT/L/T/ES
Wastewate� Treatn�en� P/ant
September 14, 2009
Bill Fox, P.E.
Cosmopolitan Engineering Graup
117 South 8�' Street
Tacoma, WA 98402
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Subject: Completion of the Mixing Zone Study, Reasonable Potenfial Analysis, and Tier II
Antidegradation Determination for the Westside WVJTP.
Dear Bill:
17us letter seaves as a contract for services with the City of Bremerton (The City) for the completion of flie NI'ixing
Zone Study, Reasonable Potential Analysis, and Tier II Anddegradation Determination for the Westside W W'I'P. The
specific scope of work shall include the following work items:
1.
2.
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5.
6.
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Completion of the mixing zone modeling update vsing e�luent flows mid other design ariteria as approved by
Ecology in the 09/10/04 email to Matt DeBoer.
The City of Bremerton shall provide aIl ef�luent priority pollufant data (ammonia, chlorine, metals, organics)
collected since the previous mixing zone study (2002-2006).
.Determine,"r,e�sonab.�apotential" to exceed water quality standatds for priority pollutants at acute, chronic
and human health mixing zone boundaries.
(�uantify the "estunated.c}�m►ge �X the �dge..of.the chronic mi�ung zone" for the proposed action for the
parameters in the table provided in �cology's Antidegradation Guidat►ce.
Deternrine whether the "measmable degradation" metric in the Antidegradation Guidance is met.
If there is no potentiat for ,nneasurable degradation, form the basis for a statexnent of compliance with the
Antidegradation requirements.
Provide a letter report ��mmari�ing all of the above for submission to Ecology.
The City of Bremerton authorizes a fee of $11,'700.00 for the mixing zone study, reasonable potential analysis and
Tier II antidegradation determination. ?�"�—
If Cosmopolitan Engineering Group agrees to the above terms, please indicate �cceptance by signing below where
indicated. If you have any questions ar concems, please contact Pat Coxon at (360) 473-5448.
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Pn� w��
Director of Public Works and Utalities
Cosmopolitan Engineering. GrQup.egrees to the above teims: {,, � ., ' ' . . . ; ' , ' ,
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Bill Fox, P.E. � � � . .. . . , . � .