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From page 76... ... 76 A p p e n d i x A The following case studies and lessons learned are from airports that have implemented GSI management strategies: • San Diego International Airport (SAN) • Austin–Bergstrom International Airport (AUS) Read the entire page →
From page 77... ... Case Studies of GSi Strategies at Airports 77 Case Study of San Diego International Airport (SAN) November 24, 2015 Characteristics: Climate Zone: Hot-Dry FAA Region: Western-Pacific FAA Category: Primary Large Highlights: 1) Read the entire page →
From page 78... ... 78 Green Stormwater infrastructure Source: J Jolley (© 2015) Read the entire page →
From page 79... ... Case Studies of GSi Strategies at Airports 79 Porous Pavement – Landmark Aviation Fixed Base Operator (FBO) /General Aviation: At the general aviation area, completed in August 2014, porous pavement has been installed along access roads and in parking areas. Read the entire page →
From page 80... ... Figure A6. Rental car center bioswales. Read the entire page →
From page 81... ... Case Studies of GSi Strategies at Airports 81 during large storm events. The high-rate media filters are similar to sand filters but are augmented with compost, zeolite, and other media. Read the entire page →
From page 82... ... 82 Green Stormwater infrastructure Figure A11. Green build landside parking lot area – view of porous pavers in parking spots. Read the entire page →
From page 83... ... Case Studies of GSi Strategies at Airports 83 Except for the rental car center, all property is managed by airport staff. The 12-acre rental car center includes a recently installed engineered bioswale system. Read the entire page →
From page 84... ... 84 Green Stormwater infrastructure Case Study of Austin–Bergstrom International Airport October 12, 2015 Characteristics: Climate Zone: Hot-Humid FAA Region: Southwest FAA Category: Primary Medium Highlights: 1) Vegetated filter strips utilized within runway safety area (RSA) Read the entire page →
From page 85... ... Source: M Barrett (© 2015) Read the entire page →
From page 86... ... 86 Green Stormwater infrastructure of regular landscape maintenance. The bioretention systems have not been in place long enough to require major maintenance or any activities related to maintaining the water quality function. Read the entire page →
From page 87... ... Case Studies of GSi Strategies at Airports 87 frequently to a height of 6 inches to reduce cover and discourage rodents. There does not appear to be any maintenance exclusively done for water quality reasons, but vegetated filter strips do require the development and implementation of an Integrated Pest Management Plan. Read the entire page →
From page 88... ... 88 Green Stormwater infrastructure done so that all runoff is assumed to be infiltrated, which makes them very large compared to the design guidelines used in many other jurisdictions. AUS has a detailed stormwater management plan that includes delineated drainage areas for all outfalls, as well as hydrologic (MIKE-SWMM) Read the entire page →
From page 89... ... Case Studies of GSi Strategies at Airports 89 specific pollutants. As mentioned previously, any GSI practice installed at the airport must provide sand filter equivalent treatment for the following constituents: total suspended solids (20.62 mg/L) Read the entire page →
From page 90... ... 90 Green Stormwater infrastructure Case Study of Seattle–Tacoma International Airport October 7, 2015 Characteristics: Climate Zone: Marine FAA Region: Northwest Mountain FAA Category: Primary Large Highlights: 1) Bioswales receiving stormwater directly from streets and parking areas. Read the entire page →
From page 91... ... Case Studies of GSi Strategies at Airports 91 with less potential for industrial activity on the west side of the airport. Industrial stormwater from the subwatershed on the east side of the airport is treated within the IWS for fuel spills by dissolved air floatation and discharged, depending on whether it is low- or high-strength BOD wastewater, to Puget Sound via the Midway Sewer District outfall pipe (low strength) Read the entire page →
From page 92... ... 92 Green Stormwater infrastructure The "ecology embankment" bioswale, installed in 2008–2009 adjacent to the expressway, was designed to follow the Washington State Department of Transportation (WSDOT) "ecology embankment system" (see Figures A18 to A20) Read the entire page →
From page 93... ... Case Studies of GSi Strategies at Airports 93 Source: J Jolley (© 2015) Read the entire page →
From page 94... ... 94 Green Stormwater infrastructure Source: Port of Seattle (© 2015) Read the entire page →
From page 95... ... Case Studies of GSi Strategies at Airports 95 Source: B Duffner (© 2015) Read the entire page →
From page 96... ... 96 Green Stormwater infrastructure The media filter swale is composed of layers of highly permeable, highly reactive sands to reduce zinc levels in the stormwater runoff including: • Planting topsoil: 50 to 70 percent sand, 15 to 25 percent compost, and 10 to 20 percent clean topsoil; • Media: 50 percent rhyolite sand, 30 percent zeolite, and 20 percent granular activated carbon; and • Coarse sand/pea gravel mix between media and underdrain. An example of a system combining the bioretention swale with the polishing media filter swale is shown in Figures A26 through A28. Read the entire page →
From page 97... ... Case Studies of GSi Strategies at Airports 97 Figure A26. Location of SDE4/SDS1 bioswale and media filter (shown as lime green strips S1-8, and E4-15) Read the entire page →
From page 98... ... 98 Green Stormwater infrastructure – Replacing mulch annually where heavy metal deposition could occur (high traffic areas) , or every 3 to 5 years for residential areas to maintain 2- to 3-inch depth; and – Replacing soil every 20 years and conducting tests to ensure soil removes heavy metals. Read the entire page →
From page 99... ... Case Studies of GSi Strategies at Airports 99 • Regrade and reseed to design specifications where the bioswale has been eroded or scoured due to high flows or flow channelization. Filter Strips • Remove trash and debris accumulated in the filter strip. Read the entire page →

From page 76...

... 76 A p p e n d i x A The following case studies and lessons learned are from airports that have implemented GSI management strategies: • San Diego International Airport (SAN) • Austin–Bergstrom International Airport (AUS)