Potomac Yards 1 and 2/EPA

LEED Silver Version 2.0

• Best management practices was followed through use of a silt fence, stabilized construction entrance, sediment basin and other measures
• Urban redevelopment site through a development density for the project and surrounding areas is 86,089.05 s.f. per acre.
• Brownfield site which contained soil contaminated by cinder balast, arsenic, and benzo (A) pyrene. This was remediated prior to construction.
• Public transportation access is provided by 2 bus lines within 1/4 mile of the project site. The site is also served by two rail lines just beyond the 1/2 mile radius from the project site.
• Bicycle storage and shower facilities for 7% of the full-time equivalent building occupants.
• 14 Refueling Stations are provided to accommodate the required 3% of the total on-site parking
• Parking capacity does not exceed minimum code requirements and provides preferred parking for carpools at 5% of occupants
• Open space is preserved by 50% of the site area that does not fall within the building footprint. The area has been restored with native planting.
• Storm water treatment is achieve in  82% total suspended solids and 63% total phosphate removal based on estimated loading from a 2-year / 24-hour storm event.
• Heat islands in non-roof surfaces were avoided in 100% of the on-site parking stalls being located underground.
• 83.4% of roof meets emissivity requirements and complies with Energy Star to reduce heat island effect and 4.7 % is vegetative roof.

Water Efficiency

• No permanent irrigation system has been installed and  native/drought-tolerant planting were installed on the site
• Over 41.56% water use reduction through use through the installation of dual flush water closets, ultra low flush urinals, low flow showerheads, and ultra-low flow lavatory faucets

Energy & Atmosphere

• Optimized energy efficiency through a 20.7 % energy reduction compared to Amercian Society of Heating and Refrigeration Engineers (ASHRAE) 90.1-1999 using the LEED engineering and construction bulletin method
• Additional commissioning implemented for the project.
• Hydroflurocarbon and Halon free HVAC (heating ventilation and air conditioning) equipment
• Green power purchased to meet 68% of the building electrical needs for over of 2 years

Materials & Resources

• Occupant recycling
• Diverted 71.62% of construction waste through effective waste management plan
• 27.36% of total building materials by value contain recycled materials
• 62.8% local and regional materials manufactured regionally
• 82.79% of wood based building products are harvested from Forest Stewardship Council certified sources Indoor Environmental Quality (IEQ)
• CO2 sensors monitor to outside ambient levels and increased ventilation if exceeding thresholds
• Construction Indoor Air Quality (IAQ) Management plan was in compliance with Sheet Metal and Air Conditioning Contractors' National Association guidelines, during construction, MERV 8  filters were installed at grilles
• Construction IAQ Management plan before occupancy – the project conforms with the required IAQ testing protocol
• Low emitting adhesive and sealants were used
• Low emitting paints  were used
• Low emitting carpet was used
• Low emitting composite wood was used
• Indoor pollutant source control
• Designed for thermal comfort compliance with ASHRAE 55 – 1992 for relative humidity and temperature
• Thermal comfort monitoring system installed for compliance with ASHRAE 55 – 1992 for relative humidity and temperature
• Daylight and views for 90% of all regularly occupied spaces

Innovation and Design

• Exemplary performance in local materials- achieved 62.8% of the total materials by cost were manufactured within 500 miles
• Green house keeping program
• Educational program
• Exemplary performance in  41.56 % water savings
• LEED accredited professionals participating on the project

Additional Resources

• Potomac Yards 1 and 2/EPA Web Site
• Potomac Yards 1 and 2/EPA Fact Sheet
• Potomac Yards 1 and 2/EPA Whole Building Design Guide Case Study