7a Supp
Item No.: 7a_supp Meeting Date: June 3, 2014 Stormwater Overview Briefing 1 Presentation Overview 1. Century Agenda Goal To meet or exceed agency requirements for stormwater leaving Port-owned or operated facilities 2. Permits Successes and challenges 3. Stormwater Fees $4 Million/year to City of Seattle. 2 Glossary AKART All Known, Available and Reasonable methods of prevention, control, and Treatment BMP Best Management Practices ISGP Industrial Stormwater General Permit NPDES National Pollutant Discharge Elimination System SWM Storm Water Management 3 Airport Individual NPDES Permit Stormwater Drainage System Industrial Wastewater System Construction Activities Metal treatment and flow control Aircraft Deicing and Maintenance Small to major capital works Miller and Des Moines Creek Puget Sound discharge Turbidity and oils & grease control 4 Industrial Wastewater Treatment 100 to 300 M gallons/year > 95% BOD Reduction $60 million upgrades 5 Stormwater Management 100% surfaces Expressways detained and treated 160 120 $78,000,000 80 Before ug/L 40 After 0 T-Zinc T-Copper Runways 30 ug/L 20 10 Before After 0 T-Zinc T-Copper 6 Permit Coverage Phase I Municipal Stormwater Permit ISGP Permits 18 Tenant Permits 2 Port Permits Covering 700 Acres Other SEA/RE NPESP Permits Individual, Boatyard, Construction All NPDES Permits 100% of Permit Coverage at RE/SEA 1% Other 65% ISGP 34% Municipal 7 Port of Seattle ISGP 1 Acre Treatment Site Oyster Shells Vacuum Scrubber Splash Boxx at T91 9 ISGP Thresholds WA State ISGPs contain the most stringent requirements in the country for Zinc & Copper. Corrective Action Threshold Limits Zinc Copper micrograms per liter micrograms per liter 260 33.2 20 117 120 14 Washington California Oregon Washington California Oregon 10 ISGP Cycle Time WA State Standards: most stringent in the country AND fastest to comply. If baseline requirements are exceeded in Washington State, action must be taken within 1 Quarter. Level 1: Operational Level 2: Structural Level 3: Treatment If baseline exceeded e.g. Sweeping e.g. Covering storage areas e.g. Chitosan or Up-flo $ $$ $$$ 11 ISGP Tenants T-46: Port installing Up-flo on 3 of 4 outfalls / ~80 acres Appling structural and operational BMPS throughout the site. T-18: Due to high number of outfalls (20) / ~200 acres: Installing Modular Wetland System and roof down spout treatment at source locations Appling structural and operational BMPS throughout the site T-5: Unknown treatments needed ~160 acres 14 Outfalls T-115: Installing a Chitosan treatment system on 2 of 5 outfalls / ~70 acres Appling structural and operational BMPs throughout the site. Also Treatment needed at: T104, T106, T108, T25 & T30 12 Joint AKART Study A roadmap for: Partners Predictable ISGP compliance reasonable required stormwater treatment actions. Tied to larger permit update Issued on May 7th with New ISGP for public comment. 13 City Stormwater Fees SWM Fees: 1997 - 2018 $5.0 $4.57 1997-2013 SWM Fees: $4.39 $4.5 $4.22 $4.06 $4.0 $24 Million $3.69 $3.5 Next Five Years for SWM Fees: $3.36 $3.05 $3.0 $ 21 Million $2.71 In Millions $2.5 $2.26 $2.31 $2.04 $2.0 $1.40 $1.5 $1.30 $1.05 $1.0 $.83 $.69 $.69 $.73 $.51 $.51 $.40 $.42 $0.5 $0.0 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 Tenants Port of Seattle 14 Port has the same obligations and authority as the City. Obligations: Both the City and Port have a Phase 1 municipal permits that governs our Stormwater programs. Authority RCW 53.08.043 expressly grants port districts "all of the powers relating to systems of sewerage authorized by RCW 35.67.010 and 35.67.020 [utility statutes for Cities]." 15 Spigot Stormwater costs Stormwater infrastructure ISGP Municipal repair & costs Program upgrades $50M to $10M $25M 100M 16 Total Stormwater requirements Next 5 years $85 to $135 Million in SW Requirements Plus $21 million could be used repair and $21 Million in SWM fees replaced 16 miles of Port owned stormwater pipes. 17 Next Steps Discuss Stormwater Fees with City of Seattle Return to Commission in late summer with options Continue implementation of our Phase I municipal permit Work with WPPA and others on the next ISGP (out for public comment now) and the AKART Continue to look for innovative and cost effective solutions, like the Splash Boxx 18
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