Polluted stormwater runoff from construction sites often flows through Municipal Separate Storm Sewer Systems (MS4s) and eventually is discharged into local rivers, streams, bays, bayous and the Gulf of Mexico.
Pollutants which are commonly discharged from construction sites are:
Concrete truck washout
Oil and grease
Phosphorous and nitrogen in the form of fertilizer
Solid and sanitary wastes
Of these pollutants, sediment is the main concern. Typically, sediment runoff from construction sites is 10 to 20 times greater than those of agricultural lands and 1,000 to 2,000 times greater than those of forest lands. During a short period of time, construction sites can contribute more sediment to streams than can be deposited naturally during several decades. The outcome of sediment being carried off site, the contribution of other pollutants from construction sites, can cause physical, chemical and biological harm to our nation’s waters.
Remember, the permit required under the Department of Environmental Protection NPDES stormwater program is different from the Environmental Resources Permit (ERP) required under Part IV, Chapter 373. F.S. and a stormwater discharge permit required under Chapter 62-25, F.A.C.