Scheduling is the development of a written plan that includes sequencing of construction activities and the implementation of BMPs while taking local weather and climate into consideration. The purpose of scheduling is to minimize soil exposure to erosion by wind, rain, runoff, and vehicle tracking, and to perform construction activities and erosion and sediment control practices in accordance with the planned schedule. By planning and adhering to a schedule, you can reduce the need for other erosion and sediment control BMPs that are more costly and often less effective. This is especially important during the rainy season, when the potential for soil erosion is high.
When practical, major grading operations should be scheduled during dry months. Allow enough time before rainfall begins to stabilize the soil with vegetation or physical means, or to install sediment trapping devices. This way, you can minimize the amount of soil that is exposed during the rainy season, therefore minimizing the potential for soil erosion. In addition, avoid application of cement-based materials in rainy weather and 48 hours prior to rain events. Stormwater runoff contacting stucco materials or freshly poured concrete, etc., will cause the pH of stormwater to rise, potentially causing an exceedance.
The schedule should include each phase of construction, and clearly show how the rainy season relates to soil-disturbing and re-stabilization activities. Details on the implementation and deployment of BMPs for erosion control, sediment control, tracking control, wind erosion control, non-stormwater management, waste management, and materials pollution control during the rainy season should also be included.
Stabilize non-active areas as soon as possible after the cessation of soil disturbing activities or at least 48 hours prior to the onset of precipitation. When rainfall is predicted, adjust the construction schedule to allow for the implementation of soil stabilization and sediment treatment controls on all disturbed areas prior to the onset of rain.