EXH0652024709

PCHBPollution Control Hearings Board of the State of Washington

Attachedisthe WQ ManagementPlan. Basically,it documentswhy the Port will use bioswalesoverother BMP alternativesfor the Third Runway. Ifthere'sanythingyoucan add (i.e., per our discussionearlier regardingthe drawbacks of vaults), it wouldbe much appreciated. Thanks. Ken Kenneth Ludwa Parametrix, Inc. 5808 Lake Washington Blvd. NE Kirkland, WA 98033-7350 (425) 822-8880 kludwa@parametrix.com AR 024709 J From: Ken Ludwa To: Jim Thomson Date: Fd, Ju110, 1998 10:29AM Subject: Attachment Sorry,forgotto attach the document... KennethLudwa Parametrix,Inc. 5808 LakeWashingtonBlvd.NE Kirkland,WA 98033-7350 (425) 822-8880 kludwa@parametrix.com AR 024710 k¢ ,,= -.- ,,, i .... , ..... ,.enLudwa-W g...Le_r).doc P_e-;l_;I PRELIMINARY COMPREHENSIVE STORMWATER MANAGEMENT PLAN FOR SEA-TAC INTERNATIONAL AIB.PORT MASTER PLAN IMPROVEMENTS APPENDIX F STORMWATER QUALITY MANAGEMENT PLAN Preparedfor PORT OF SEATTLE Prepared by P_TRIX, INC. 5808 Lake Washington Blv& N.E. K.irldand, Washington 98033 DRAFT I July 1998 55-2912-01 .(28) AR 024711 _en Ludwa- Wq_rept2.d-oc ........... P_ag_ TABLE OF CONTENTS 1. I2qTRODUCTION 1-1 1.1 PURPOSE 1-1 1.2 GOALS AND OBJECTIVES 1-1 1.3 STIA WATER QUALITY MANAGEMENT STANDARDS 1-2 2. EXISTING CONDITIONS 2-1 2.1 DRAINAGE 2-1 2.1.1 STIA Drainage: Storm Drain System and Industrial Waste System 2-1 2.1.2 Receiving Systems: Miller and Des Moines Creeks 2-2 2.2 EXISTING BMPs 2-2 2.2.1 Source Control 2-2 2.2.2 Treatment BMPs: Industrial Wastewater System 2-5 2.2.3 Treatment BIV[Ps:Stormwater Drainage System 2-5 2.3 EXISTING STOR.MWATER QUALITY 2-6 3. PROPOSED MASTER PLAN BMP ALTERNATIVES 3-1 3.1 DESCRIPTION OF BMP ALTERNATIVES 3-1 3.1.1 Biofi.ltration Swales 3-1 3.1.2 Wet Vaults and Wet Ponds 3-2 3.1.3 Sand Filters 3-3 3.2 MASTER PLAN PROJECT AREAS REQUIRING BMPs 3-4 3.2.1 Runway and Taxiways: SDS…
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