| Problem | Solution |
| Sediment (including soil and shrub and tree clippings) can wash into water bodies | Measures should be taken to minimize erosion and screen other debris from entering the stormwater system. For more information, please see the Delaware Sediment and Erosion Control Handbook |
| Wash waters from concrete mixers can run down the street gutter into the storm drains. | These waters should be disposed of at the contractor’s site or a large hole, big enough to contain all the wash waters. |
| Used oils, solvents and other hazardous fluids may spill or rainfall could wash these hazardous fluids into nearby waterways. | Waste storage for used oils, solvents and other hazardous fluids must be under cover with secondary containment in case of a spill and to prevent exposure to rainfall which would wash hazardous fluids into nearby waterways. |
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Landscaping and earthmoving pollutants include soil disturbing activities, excavation, tilling, masonry and concrete, solid wastes such as trees and shrubs, soil additives and revegetation of graded areas. All contribute to soil erosion. |
Wherever possible, preserve existing vegetation. Determine the erosion and sediment control practices and install them before clearing the site. Among the more commonly used practices are vegetative filter strips, silt fence, gravel drives, and runoff inlet protection. Revegetate the site as soon as possible. |
| Vehicle and equipment maintenance becomes a significant factor when engine repairs or preventive maintenance such as changing oil and other fluids occurs at the construction site. | Off site facilities should be used and work performed in designated areas only. Provide cover for materials stored outside, contain and clean up spills immediately, and train employees and subcontractors. |
EPA
NPDES Stormwater Discharges from Construction Activities
Delaware
Sediment and Stormwater Regulations