1605 SE EVERETT MALL WAY WALMART 2018-01-01 MF Import

Seattle,Washington T 206.52 www.pacl2.9510and.com TURNING VISIONS INTO REALITY 4. Keeping distances for overland flow short to promote sheet flow and minimize concentration of runoff The project proposes a new collection system for treatment along the east side of the parking lot, this addition shortened overland flow and reduces overland to the existing parking lot catch basins. Any further modifications to flow paths would require substantial re-grading and disturbance of the site. This item is addressed to the maximum extent feasible. 5. Managing stormwater as close to its origin as possible. See item 4 above, the addition of a collection system shortens the overland flow path for a portion of the site. Any further modifications to flow paths would require substantial re-grading and disturbance of the site. This item is addressed to the maximum extent feasible. 6. Directing runoff to areas of permeable soils or natural depression areas to promote infiltration Where possible (in new non-pollution generating impervious surface situations) permeable pavement is proposed to encourage discharge into subsurface soils. The soil present onsite is not conducive to extensive infiltration due to the variety of fill soils and the existing Alderwood-Urban soil type. However, limited areas of infiltration should not compromise the surrounding surface features. Natural depressions do not exist onsite. This item is addressed to the maximum extent feasible. 7. Integrating numerous small, dispersed bioretention areas to capture, store, and infiltrate stormwater on site. Currently the site drains to centrally located catch basins, not vegetated areas. Any - modifications of the landscape islands and adjustments to the slope direction of the paved areas would require substantial additional disturbance of the site. The cost of these changes would prohibit the redevelopment of the site, due to the reduced return on the investment. This item is addressed to the maximum extent feasible. 8. Designing roads, parking, lots, and other proposed site features to follow the site's topographic contours in order to minimize cuts and fills and the resulting soil and vegetation disturbance and loss of topsoil or organic duff layer. The pre-developed condition as defined in the Manual glossary is the existing condition. Additionally, minimal earthwork is associated with this redevelopment; therefore this item is addressed to the maximum extent feasible. 9. Limiting the effective impervious area of the site. The project improvements result in a net reduction in impervious area, therefore this item is addressed to the maximum extent feasible. 10. Orienting on-site structures and impervious areas to facilitate sheet flow of stormwater runoff into vegetated open spaces or bioretention areas. Everett Mall Plaza Parcel III Retail Expansion Stormwater Site Plan Page 10