SLP-2 is known as “The American Table of Distances” or “ATD.” It was originally developed by IME to establish safe distances for the location of explosives storage magazines to protect the public, workers, and infrastructure. Published in 1910, the ATD has been updated several times and is still widely used today in the US and internationally. Even with the growing use of quantitative risk analysis (see IME SLP-31), the ATD is remains a valuable tool for assessing potential storage locations.