Areas where construction or demolition activities take place can impact water quality if inadequate erosion control practices result in discharges of sediment and other pollutants to surface water bodies through stormwater runoff. The frequent movement of equipment and vehicles on and off the site can cause mud and debris to be tracked from the site and cause increased soil compaction, which reduces infiltration and increases runoff volume. The tracked mud and debris is deposited on the roads, which are usually connected to the stormwater drainage system that leads directly to a surface water body. Other pollutants associated with construction activities include chemicals, fuel, and lubricants, which if not handled, stored, or disposed of correctly can contaminate ground water or surface water.