17 E MARINE VIEW DR 2022-02-01 - Laserfiche WebLink

Table 1 — Summary of Site Pollutant Constituents Constituent (Pollutant) Location Depth Concentration Sediment Onsite 2 feet — depth of excavation N/A Proposed Construction Activities (1.2) Description of site development: This restoration activity is part of a larger project, which includes relocating thermal desorption units (TDU) and constructing storage buildings to house those units. Prior to relocation of the TDU's and construction of any new improvements, the city of Everett is requiring the site operator, Cadman Materials, to restore a 1.80 acre area where unpermitted clearing and grading of the site was performed. Description of construction activities (example: site preparation, demolition, excavation): Construction will consist of establishing clearing/construction limits, installation of Temporary Erosion and Sediment Control (TESC) Best Management Practices (BMPs) including perimeter protection, excavation of the recently placed fill material, restoration to the grades prior to placement of the fill, and planting of landscaping within 100 feet of the Snohomish River. Description of site drainage including flow from and onto adjacent properties. Must be consistent with Site Map in Appendix A: The site is bound to the north and east by the Snohomish River and to the south and west by adjacent industrial properties. Currently, stormwater runoff west of the restoration area generally flows to the west to lower areas onsite. To the south, some run-on occurs from gravel access and site storage areas. The proposed restoration will not change drainage patterns to the west, but will slightly raise grades along the south side of the restoration area, allowing the restoration area to positively drain across the restored vegetated area and into the river. The slight change in grades at the south property line will not change natural drainage patterns, as the area to the south will still ultimately drain to the river; however, runoff from adjacent properties to the south will no longer sheet flow directly across the site.