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The Watershed Company• EAlBlumen <br /> June 2012 <br /> constructed of crushed rock,would be clean and infiltrate into the trail bed or <br /> runoff into adjacent forested soils. The trails would not accommodate motorized <br /> vehicles which could be a source of hydrocarbons or other pollutants. Trails and <br /> other improvements would not be constructed in the stream,and any trail <br /> sections that might be necessary across the wetland would be raised boardwalks <br /> constructed using BMPs to avoid and minimize erosion. <br /> 4.8.2 Groundwater <br /> The Proposed Action would not result in any excavations below the ground <br /> water table and would not impact groundwater. <br /> 4.8.3 Mitigation Measures <br /> Potential for water quality impacts is very limited by the scope of the Proposed <br /> Action and resulting activities at the Replacement Site. All Replacement Site <br /> improvements would be made consistent with an erosion and sedimentation <br /> control plan to address temporary and permanent water pollution control <br /> measures, and would be implemented in conformance with Best Management <br /> Practices. <br /> 4.9 Biological Resources <br /> 4.9.1 Conversion Site <br /> Prior to conversion,the Conversion Site was forested. Based on vegetation <br /> remaining on site and the composition of some adjacent forest patches to the <br /> south,the likely species composition was red alder,Douglas-fir,western red <br /> cedar,big-leaf maple, sword fern,salal,Oregon grape,red huckleberry,Pacific <br /> dewberry, and Himalayan blackberry. Except for the invasive Himalayan <br /> blackberry, these plant species are typical of native second-growth forest in <br /> Snohomish County. The most likely wildlife to occupy the Conversion Site <br /> habitat are songbirds and small mammals. Water was not present on the site, <br /> nor were any other special habitat features likely present;none were <br /> documented in the SEPA checklist(Appendix B) completed for the fire station <br /> project. <br /> The site was and remains bordered to the north and east by single-family <br /> residential development,to the west by relatively busy 14th Avenue, and to the <br /> south by the gravel parking lot and more active park use areas. Historical aerial <br /> photos indicate that the Conversion Site was somewhat isolated from the <br /> remainder of the park's few forested corridors and Silver Lake by the former <br /> terminus of Silver Lake Road in a cul-de-sac and a pedestrian trail between the <br /> cul-de-sac and the gravel lot. <br /> Page 25 <br />