615 75TH ST SE Geotech Report 2022-10-25

• • Subsurface Exploration, Geologic Hazard, and Boardwalk Condominium, Building C Geotechnical Engineering Report Everett, Washington Geologic Hazards and Mitigations 7.0 EROSION HAZARDS AND MITIGATION In order to reduce the amount of sediment transport off the site during construction, the following recommendations should be followed. 1. All storm water from impermeable surfaces and adjacent downspout and footing drains should be tightlined into an approved storm water drainage system or temporary storage facilities and kept away from the proposed work areas and not discharge onto or above the steep slopes at the site. 2. If possible, construction should proceed during the drier periods of the year and disturbed areas should be revegetated or otherwise protected as soon as possible. 3. Site disturbance beyond the new foundation work areas should be kept to a minimum. 4. Temporary silt fences should be provided along the lower margins of cleared/disturbed areas. 5. Erosion control elements should be cleaned out and maintained periodically, as necessary, to maintain their capacity and function. 6. Soils, which will be stockpiled at the site, should be stored in such a manner as to reduce erosion from the stockpiles. Protective measures may include, but are not necessarily limited to, covering with plastic sheeting or the use of straw bales/silt fences around pile perimeters. Soils should not be stockpiled on the steep site slopes. September 12, 2012 ASSOCIATED EARTH SCIENCES, INC. FSM11d-EE12028848-Projects 1201202881EEIWP Page 8