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## A5.3.6 Salt and Sand Piles 

<img src='content_image/551053.jpg'>

Source: CRC Handbook of Chemistry and Physics. 

Many airports store salt and sand piles on- site for use in maintaining roads and runways during inclement weather. Fugitive dust emissions occur at several points in the storage cycle, such as material loading onto the pile, disturbances by strong wind currents, and unloading from the pile. 

The methodology for estimating emissions from material storage piles is provided in Chapter 13.2.4, Aggregate Handling and Storage Piles 34 , and Chapter 13.2.5, Industrial Wind Erosion 35 , of EPA’s AP-42, and are associated with two main activities: (i) batch loading and unloading of material, and (ii) wind erosion of the piles, respectively. 

## A5.3.6.1 Methodology - Loading and Unloading of Material Piles 

The major source of PM emissions during “loading and unloading” of piles occurs as material is dropped from a loader onto the pile or into a truck. The methodology for calculating the PM emission factor for these events is provided in Chapter 13.2.4, Aggregate Handling and Storage Piles 36 , of EPA’s AP-42, and is based on mean wind speed, material moisture content, and cutoff 

