EXH0465022958

PCHBPollution Control Hearings Board of the State of Washington

State of Washington Energy Facility Site Evaluation Council Project Developed By: Newport Northwest LLC !-:, AR 022958 .3an .22 02 12:02p Rachae! Pasohal Osborn 50S-328-8144 p,2 The clay collarswould be placed near the face of the borepits to ease the installation and to minimizeany potential forbentonitemigration to the creek, Use of clay collars is a routine constructionpractice andpresentsinsignificantrisksto creW-waterquality. •Permanent Stormwater Management See Section2.10.3Permanent StormwaterManagement for derails. Runoff/Absorption Runoff fromthe project site is discussed in Section 2.10 Surface Water Runoff and Section 2.8.2.4SiteStormwaterSystem. Rainfalluponthe 66-acrebeanedpmjeotsite will be captured .androutedm oiUwaterseparators,thento a detentionpond wherethewaterwill be collectedand , directedm the powerplant cooling towerbasin. Duringa normalprecipitationyear,7 inches of waterwill be capturedover the 66-acrebermedprojectsite. Thisamounts to 38.5 acre-feetper ),earof water (assumingno loss to evaporation)that no longerwill p=colate into the sell and gravelaquifer. Thepolicyof the Wuhington DepartmentOf Bcologyis fortheApplicantto requesta waterright permit for the beneficialuse of waterexceeding5,000gallons per day. The WalluJ_Power t'rojectwill use more than 5,000 gallons per day and thus all watei"sources, includ_,igthe :. " beneficialcaptureand beneficialuse of stonnwatermustbe includedin the projectwaterfights / request.Inview of the captureandbenefioieduseof stormwater,the Applicantrequeststhat anew point of withdrawalbe embl_ed for the consolidatedBoise CascadeCorporationfiber farm ' waterrights. Thenewpoint of withdrawalwill be thepowerplantlocation,to permitreuseof the stormwaler. Any stormwatercaptured for the power plant use results in a correspondingreduction in groundwaterwithdrawalsformthegravelaquiferlocatedunder the proposedpowerplantandthe BoiseCascadeCorporationfiberfarm. Therefore,captureof srormwaterforbenefiaialre-usehas no net impact upon the aquifer resourcesand is not includedin the calculationof water use requirementsdescribedin Section 2.5 WaterSupply System.The additionalpointof withdrawn1 is acceptablefrom'a bydrogeologicstandpointbecause the same bodyof water is involvedand stormwalercapturewit}affect existingwaterrightsthe sameas the existingwithdrawallocations. The on-sitemakeup…
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