EXH0240A018988

PCHBPollution Control Hearings Board of the State of Washington

northwest hydraulic consultantSsacramentoinC. ]I16300 christensenroad, suite350 vancouver | EXHIBIT NO:2_'_,_seattle,washington98188-3418 edmonton | ,2.5-0._(206) 241-6000 - phone(20e)439-242o- tax seattle • M. Green September 25, 2000 Mr. GordonWhite ProgramD.'ector Shorelands and Environmental AssistanceProgram Wasl_gton State Department of Ecology 300 Desmond Drive SE Lacey, WA 98503 Subject: Pre"luninaryComments (Set 2) on August 2000 Stormwater Management Plan for Seattle-Tacoma International Airport Master Plan Update Improvements. This letter is our secondinstallmentofpre"hminaz7reviewcommentson the August 2000 Stormwater ManagementPlan, and shouldbe readasa continuationof our letterdatedSeptember21, 2000. As explainedin the first installment,our commentsare being provided on an incrementalbasisbecauseof delaysin our being provided the SMP andthe lackof adequatetime to provide comprehensivereview comments. This letter focuseson projectimpactsto streambaseflows and seepageflows to wetlands. The current SMP doesnot adequatelyassessprojectimpactsand doesnot demonstratethat there will be appropriate mitigationfor predictableproject impacts. Theseare not new concerns.The August 2000 SMP continuesto provide conflicting information which failsto consistentlyrecognizethe impactsand consequentlyfailsto proposesufficientmitigation. We recentlyquestionedthePort's commitmentto baseflow mitigationand preservationof seepageflows duringa meetingwith Ecology on August 3, 2000 with follow-up byan email on August7, 2000 from Bill Rozeboomto Eric Stockdaleas follows: At our meeting last week, you asked me to provide something in writing to supplement my ytatement that the present design offers no assurance that seepage flows will be preserved to wetlands below the proposed 3rd embanlonent. My statement is based in part on the following text which is m the public record from the Port's March 10, 2000 response to 401/404 comments... In the text which follows, the part of greatest relevance to your concerns is the part which reads,…
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