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alloLt II Sequencing Description A work schedule that coordinates the sequence of land - disturbing activities with the installation of erosion and sedimentation control practices. A construction sequence schedule is a specified work schedule that coordinates the timing of land- disturbing activities and the installation of erosion - protection and sedimentation - control measures. Purpose To reduce on -site erosion and off -site sedimentation from land - disturbing activities by installing erosion and sedimentation control practices in accordance with a planned schedule. Reduce on -site erosion and of site sedimentation by performing land - disturbing activities and installing erosion - protection and sedimentation - control practices in accordance with a planned schedule. Preserving the natural vegetation on -site to the maximum extent practicable will minimize the impacts of development on stormwater runoff. Preferably 65 percent or more of the development site should be protected for the purposes of retaining or enhancing existing forest cover and preserving wetlands and stream corridors. Effectiveness All land development that clears, grades or fills a significant land area. The removal of existing surface ground cover leaves a site vulnerable to accelerated erosion. Good planningwill: • Reduce land clearing • Provide necessary controls • Restore protective cover. New development often takes place on tracts of forested land. In fact, building sites are often selected because of the presence of mature trees. However, unless sufficient care is taken and planning done, in Metropolitan Council/Barr Engineering Co. Purpose Flow attenuation Water Quantity El Runoff volume reduction Water Quality Pollution prevention Soil erosion Sediment control Nutrient loading Pollutant removal Total suspended sediment (TSS) Total phosphorus (P) Nitrogen (N) Heavy metals Floatables Oil and grease Other Fecal coliform Biochemical oxygen demand (BOD) ■ Primary design benefit Secondary design benefit ❑ Little or no design benefit 3-63 c "7 -�'' i PHASE I PHASE II r / k , PHASE III f) Description A work schedule that coordinates the sequence of land - disturbing activities with the installation of erosion and sedimentation control practices. A construction sequence schedule is a specified work schedule that coordinates the timing of land- disturbing activities and the installation of erosion - protection and sedimentation - control measures. Purpose To reduce on -site erosion and off -site sedimentation from land - disturbing activities by installing erosion and sedimentation control practices in accordance with a planned schedule. Reduce on -site erosion and of site sedimentation by performing land - disturbing activities and installing erosion - protection and sedimentation - control practices in accordance with a planned schedule. Preserving the natural vegetation on -site to the maximum extent practicable will minimize the impacts of development on stormwater runoff. Preferably 65 percent or more of the development site should be protected for the purposes of retaining or enhancing existing forest cover and preserving wetlands and stream corridors. Effectiveness All land development that clears, grades or fills a significant land area. The removal of existing surface ground cover leaves a site vulnerable to accelerated erosion. Good planningwill: • Reduce land clearing • Provide necessary controls • Restore protective cover. New development often takes place on tracts of forested land. In fact, building sites are often selected because of the presence of mature trees. However, unless sufficient care is taken and planning done, in Metropolitan Council/Barr Engineering Co. Purpose Flow attenuation Water Quantity El Runoff volume reduction Water Quality Pollution prevention Soil erosion Sediment control Nutrient loading Pollutant removal Total suspended sediment (TSS) Total phosphorus (P) Nitrogen (N) Heavy metals Floatables Oil and grease Other Fecal coliform Biochemical oxygen demand (BOD) ■ Primary design benefit Secondary design benefit ❑ Little or no design benefit 3-63