Puget Sound Green Infrastructure Summit 2017

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12 * 130,000 SF office building 5 stories above-grade * Mixed use, including 15,000 SF retail space * City of Seattle Deep Green Pilot Program Stone34 Project Overview Matt Nielsen

13 Seattle Deep Green Pilot Program Allowed Additional Floor of Construction 1% of Construction Cost at Risk 75% Energy and Water Reduction 50% Storm Water Reuse Meet 60% of Living Building Challenge Imperatives Matt Nielsen

14 Water Systems Matt Nielsen

15 Behavioral Change Matt Nielsen

16 Re-using 50% of stormwater on-site is hard! As designed: Can this be optimized??? What if, add greywater? Matt Nielsen

17 Water Use, Impact of Showering 10% Showering in Baseline: 50% Showering in Baseline: Matt Nielsen

18 Target Results SITE STORM WATER CALCULATIONS Storm Water to Site: Goal - Reuse 50% of Stormwater on Site: Storm Water Evaporated at the Roof: Storm Water Evaporated on Site: Storm Water Used at Grade: Storm Water Treated and Reused: 891,000gallons / year 445,500gallons / year 59,874gallons / year 0gallons / year 0gallons / year 391,015gallons / year Site Storm Water used on Site: 450,889gallons / year 50.6%Percent of Site Storm Water Used on Site TOTAL WATER USE CALCULATIONS Baseline Building Total Water Use: Potable Water Demand: Non-Potable Water Demand: Total Water Use Target (25% of Baseline): 3,079,606gallons / year 1,540,877gallons / year 1,538,729gallons / year 769,902gallons / year Proposed Design Total Water Use: 932,665gallons / year 69.7%Savings over Baseline Potable Water Demand: 440,040gallons / year 71.4%Savings over Baseline Non-Potable Water Demand: 492,626gallons / year 68.0%Savings over Baseline Treated Recycled Water Reused for Non-Potable Demand: 391,015gallons / year Potable Water Used for Non-Potable Water Demand: 101,611gallons / year 93.4%Savings over Baseline Total Water Demand from the Utility: 541,650gallons / year 82.4%Savings over Baseline Matt Nielsen

19 Results Domestic Water Matt Nielsen

20 Puget Sound Green Infrastructure Summit Monetization and the Business Case for Green Infrastructure February 16, 2017 Brett Phillips Director of Sustainability

21 Developer: Skanska U.S.A Owners: Unico Properties and Laird Norton Properties LEED CS Platinum LEED EBOM Platinum 100 ENERGY STAR Score Seattle Deep Green Pilot 12 Living Building Imperatives 25% Energy Reduction 75% Potable Water Reduction 50% Stormwater Capture and Reuse

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24 Cistern Volume [gal] 70,000 60,000 50,000 40,000 30,000 20,000 10,000 0 Modeled Cistern Volume [gal] Modeled Rainfall to Cisern [gal] Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep 25,000 20,000 15,000 10,000 5,000 0 Rainfall to Cisern [gal] 70,000 Modeled Cistern Volume [gal] 60,000 50,000 40,000 30,000 20,000 10,000 0 Actual Cistern Volume [gal] Dryer than Normal Unuseable Storage Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

25 Puget Sound Green Infrastructure Summit Monetization and the Business Case for Green Infrastructure February 16, 2017 Brett Phillips Director of Sustainability