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10: Control DeWatering <br /> DeWatering may be necessary for this project. However, the existing vegetation retained <br /> on site would be available to spread any water from construction for filtration and disposal. <br /> 11: Maintain BMPs <br /> The construction supervisor will be responsible for maintaining all BMPs during <br /> construction and working with the City to relocate or add BMPs as necessary as site <br /> conditions change. BMPs should be inspected and maintained as needed after every rain <br /> event producing more than '/4" of rain in a 24-hour period. Also, BMPs shall be inspected <br /> on a weekly basis even if site work is not occurring. <br /> 12: Manage the Project <br /> It will be the responsibility of the Contractor and Developer to manage this project and <br /> coordinate with the City Inspector and Engineer. <br /> Inspection and Monitoring: <br /> Site inspections shall be done by a person who is knowledgeable in the principles and <br /> practices of erosion and sediment control. The person must have skills to first assess the <br /> site conditions and construction activities that could impact the quafity of stormwater, and <br /> second assess the effectiveness of erosion and sediment control measures used to <br /> control the quality and quantity of stormwater discharges. Whenever inspection and/or <br /> monitoring reveals that the BMPs identified in the Construction SWPPP are inadequate, <br /> due to the actual discharge of or potential to discharge a significant amount of any <br /> pollutant, appropriate BMPs or design changes shall be implemented as soon as possible. <br /> Maintaining an Updated Construction SWPPP: <br /> The construction SWPPP shall be retained on-site or within reasonable access to the site. <br /> The SWPPP shall be modified whenever there is a change in the design, construction, <br /> operation, or maintenance at the construction site that has, or could have, a significant <br /> effect on the discharge of pollutants to waters of the state. The SWPPP shall be modified <br /> if, during inspections or investigations conducted by the owner/operator, or the applicable <br /> local or state regulatory authority, it is determined that the SWPPP is ineffective in <br /> eliminating or significantly minimizing pollutants in stormwater discharges from the site. <br /> The SWPPP shall be modified as necessary to include additional or modified BMPs <br /> designed to correct problems identified. Revisions to the SWPPP shall be completed <br /> within seven days following inspection. <br /> 5. SOURCE CONTROL <br /> This project proposes to construct a new duplex and driveways on this parcel. Per <br /> Volume 1 of the City of Everett 2010 Stormwater Management Manual residential <br /> development does not require source control. <br /> 6. PRESERVATION OF NATURAL DRAINAGE SYSTEM <br /> The runoff from the NPGIS improvements will be dispersed on-site. By not grading or <br /> compacting the majority of the pervious surfaces to remain after construction in the area of <br /> disturbance a maximum amount of site runoff from the developed project will be absorbed <br /> and infiltrated into the existing on-site soils. This will mimic the existing conditions by <br /> maintaining the existing drainage path on-site. <br /> Haack—Lexington Duplex 16-1112 <br /> January 2017 Page 8 <br />