1019 112TH ST SW 2019-09-25 - Laserfiche WebLink

Community Health Center 4. ADJACENT AREAS The adjacent parcel to the west is developed with existing commercial buildings and parking lots. The adjacent parcels to the east are developed with existing residential structures and driveways. The 112th Street SW right-of-way lies along the southern boundary of the site. 5. SITE FEATURES AND SENSITIVE AREAS The site tends to slope easterly toward adjacent parcels at slopes ranging from 2%to 15%. From a Snohomish County Soil Survey done by the USDA NRCS the soils on-site consist of"Alderwood Urban Land Complex"type soils. According to soil logs taken by Timothy Sarkela of Western Engineers, soils on-site resemble silty sand. Refer to Appendix B for more detailed information. POTENTIAL SOURCES OF POLLUTION Potential temporary sources of pollution include possible fuel spillage during construction. All major fuel spillage during construction are to be cleaned up immediately.No long-term potential sources of pollution are expected from the development. 6. SOILS From Soil Survey of Snohomish County Area Washington as sited in the Full Drainage Report, the soils on-site consist of"Alderwood Urban Land Complex"type soils. According to soil logs taken by Timothy Sarkela of Western Engineers, soils on-site resemble silty sand. Refer to Appendix B for more detailed information. 7. EROSION PROBLEM AREAS No major erosion problem areas have been discovered for the site. S. CONSTRUCTION PHASING Construction Sequence 1. Pre-construction meeting. 2. Flag or fence clearing limits. 3. Install perimeter protection(silt fence,brush barrier, etc.). 4. Construct surface water controls (interceptor dikes, pipe slope drains, etc.) simultaneously with clearing and grading for project development. 5. Maintain erosion control measures in accordance with Snohomish county standards and manufacturer's recommendations. 6. Cover all areas that will be unworked for more than seven days during the dry season or two days during the wet season with straw, wood fiber mulch, compost, plastic sheeting or equivalent. 7. Stabilize all areas that reach final grade within seven days. 8. Seed or sod any areas to remain unworked for more than 30 days. 9. Upon completion of the project, all disturbed areas must be stabilized and best management practices removed if appropriate. 10. All temporary erosion and sediment control measures shall be removed within 30 days after final site stabilization is achieved or after the temporary BMP's are no longer needed. Trapped sediment shall be removed or stabilized on site. Disturbed soil areas resulting from removal shall be permanently stabilized. JOB NO:17-1688-A 3