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GeoTest Services, Inc. Report Date 7/17/2019 <br /> Anderson Residence- Everett, Washington GTS Project No.19-0384 <br /> per EMC, and is mapped as such on the City of Everett Critical Areas Map 3 (Goodwill, <br /> 2006). <br /> The slope is heavily vegetated and will not be significantly altered as part of the <br /> proposed construction.The footprint of the proposed addition lies within the existing, <br /> relatively flat paved carport. As such, minimal earthwork is anticipated for this project. <br /> Typical best management practices (BMPs) for erosion and sedimentation control <br /> should be specified by the project civil engineer. In addition, we recommend the <br /> following standard practices: <br /> • GTS recommends that appropriate silt fencing be incorporated into the <br /> construction plan for erosion control. <br /> • Areas of native vegetation left in place may be enhanced by adding additional <br /> native plant species and/or other vegetation enhancements. <br /> • Removal of vegetation and trees without proper mitigation may increase the <br /> risk of failure for the surficial soils during periods of wet weather. Planting <br /> additional brush and vegetation within the subject site and in areas disturbed <br /> by excavation activities will help maintain near surface slope stability by <br /> providing a stable root base within the near surface soils. <br /> • Yard waste should not be dumped onto the top or face of existing or developed <br /> site slopes. Yard waste can retain water and cause slope instability. <br /> • Proper drainage controls have a significant effect on erosion. All surface water <br /> and any collected drainage water upslope should be directed around the <br /> proposed development. All collected stormwater should be directed to an <br /> appropriate collection system. <br /> • Areas disturbed by construction should be vegetated or otherwise protected to <br /> limit the potential for erosion as soon as practical during and after construction. <br /> Areas requiring immediate protection from the effects of erosion should be <br /> covered with either plastic, mulch or erosion control netting/blankets. Areas <br /> requiring permanent stabilization should be seeded with an approved grass <br /> seed mixture, hydroseeded with an approved seed-mulch-fertilizer mixture or <br /> landscaped with a suitable planting design. <br /> d'xr" ;.yx, I a .1 -'3' ✓ '°ice e "r�e',,,Cs ^z 5; . <br /> 6 <br />