A Guidebook for Airport Winter Operations (2015) / Chapter Skim
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Pages 15-26
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From page 15... ...
15 Regulation of Winter Operation Impacts on Stormwater Planning for winter operations requires identifying applicable laws and regulations, under standing their implications, and incorporating operational and infrastructure controls to achieve and maintain compliance. Typical winter operations planning activities are understandably focused on compliance with regulations and ACs intended to maintain safe and efficient airport and aircraft operations, as described in Chapter 3.
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16 A Guidebook for Airport Winter Operations following winter operation activities can affect stormwater runoff quality, and their potential impact on compliance with the CWA is described further in this section: • Application of various chemical deicers to aircraft, paved surfaces, and ground equipment; • Application of sand to paved surfaces; and • Storage and mechanical melting of deicercontaminated snow. 4.1.1 Application of Chemical Deicers Chemical deicers are used during the winter season at most northerntier airports.
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From page 17... ...
Regulation of Winter Operation Impacts on Stormwater 17 environmental effects of chemical deicers may be significant drivers for permit compliance and deicer management at some airports, including: • Toxicity (potentially from the freezing point depressants and deicer additives) ; • Odors; • Foaming; • Total dissolved solids (TDS)
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18 A Guidebook for Airport Winter Operations It may be necessary, or simply advantageous, to mechanically melt snow. The procedure can take a variety of forms.
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Regulation of Winter Operation Impacts on Stormwater 19 fines can be required by the permitting authority. The authority could also potentially imple ment effluent limitations in place of benchmarks if it finds a reasonable potential for frequent exceedance of the benchmarks.
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20 A Guidebook for Airport Winter Operations with airfield pavement deicing are to use nonureacontaining deicers, or alternatively, meet a numeric effluent limitation for ammonia [i.e., 14.7 mg/L, prior to dilution or mixing with nondeicerimpacted stormwater]
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From page 21... ...
Regulation of Winter Operation Impacts on Stormwater 21 • Special conditions under which stormwater discharges are authorized or limited, and • Requirements for reporting monitoring data and observations. NPDES permits for industrial activities apply on a year-round basis, but may include criteria that vary by season.
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22 A Guidebook for Airport Winter Operations surface water and groundwater. The comprehensive, integrated system for managing deicerimpacted stormwater is called a deicer management system.
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From page 23... ...
Regulation of Winter Operation Impacts on Stormwater 23 • Method by which deicer is applied (e.g., use of hybrid forced air deicing units for aircraft deicing) ; • Tracking of deicer use; • Forecasting future deicer use; • Procedures for overnight parking and deicing aircraft; • Snow plowing and blowing practices; • Snow storage locations; • Snow melting procedures; and • Runway closure criteria and procedures.
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From page 24... ...
24 A Guidebook for Airport Winter Operations The testing of the sample to quantify its characteristics typically occurs through analysis at an independent, certified analytical laboratory or analysis onsite at the airport using: • Analytical equipment permanently situated in the lab. • "Test kits," which are smaller instruments that may provide results with a lesser degree of accuracy than laboratory equipment.
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From page 25... ...
Regulation of Winter Operation Impacts on Stormwater 25 Determination for Airports. This process requires an understanding and analysis of airport-specific historical winter event data similar to the process described in Chapter 5 of this guidebook.
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From page 26... ...
26 A Guidebook for Airport Winter Operations steep in the first winter of operation of deicer management systems, each winter presents its own unique circumstances. As result, it is recommended that as each year's winter operations planning is undertaken, a portion of the effort be devoted to discussing issues from the previous winter's deicer management operations to determine if any changes to the winter operations plan or the deicer management operations should be undertaken for the next season.
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