EXH0621024388

PCHBPollution Control Hearings Board of the State of Washington

• / ,NXk-_Ann Kenny, Senior Permit Specialist %__r4_._" /. _" _. Washington Department of Ecology _ "_'__ ..../D by .(_ _ t,v_ Northwest Regional Office ...f_ ..."0 _>._'/ ,_' .FALL rl_l, _. /{x#" I RlO0-160thAvenueSoutheas_ /__.(_:------_ ,,,' %./'/_ __ _. (_,_ t, _, . <-¢]. Bellevue, WA 98008-5452_r _ _., I ./ ,-" ' _ _1_ _" - M _-IId" b"I) t_ _° ] ( / a- q,_, " _..L9u1"Dear Ms. Ke /<(X ',_ . King County is pleased to have this opportunity towork with the Department of Ecology ", (Ecology) by making its technical review capacity and knowledge of local stormwater ,, conditions available to assist in reviewing the Port of Seattle's Low Flow Impact Analysis - Low Flow Impact Offset Facility Proposal (July 2001). V.-£ - _ This analysis of low flow impact_, and the proposed facilities for offsetting identified impacts, ,_ ,aNLl " za p to provide mitigation for natural resource impacts which goes b _ 17- u_L______ir r_m_i'r_ernent.e_fthe King County Su_rlrlrlrfaceWater Desigh"-Manual. Since ,,,,.) ' "_,:_jil{IJ_ this pro'l_sal goes beyor_ _6 r_uirements of the Design Manual, reviewers did not have the "" _ benefit ofL__xl_xuee.-st_d_ .ds for low flow mitigation efforts against which to measure ..._ the proposal-'_-. Theenclosureprovidesgeneralcommentsonthelowflowstudy,aswellasspecificcomments V '_i on the analysis and proposed facilities grouped by drainage basin. To assist Ecology, -y omm.n,in.,u.°.,o.°l.technical issues and the logic contributing to specific comments. Reviewers did find several inconsistencies and gaps in data, primarily in the report "_ documentat_ recommend correcting in the _inal proposal's preparation.…
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