30 112TH ST SE 2020-05-06 - Laserfiche WebLink

Shaffer Duplex Property 1. CONSTRUCTION STORM WATER POLLUTION PREVENTION ELEMENTS Element#1: Mark Clearing Limits Clearing limits have been shown on the Temporary Erosion and Sedimentation Control Plans and will be marked with construction fencing. BMP C103: High Visibility Plastic or Metal Fence Element#2: Establish Construction Entrance A temporary construction entrance at the location of the proposed driveway accessing Richmond Road is to serve as construction entrance. All vehicles shall be free of debris prior to leaving the site. BMP C105: Stabilized Construction Entrance Element#3: Control Flow Rates Flow rates during construction are likely to be negligible and will be mitigated by directing runoff through preserved on-site vegetation. Not Applicable to This Project Element#4: Install Sediment Controls Sediment controls mainly consist of installing silt fencing along the southern and eastern clearing limits. BMP C233: Silt Fence Element#5: Stabilize Soils All soils disturbed during site grading will be stabilized by use of the most appropriate BMP method available. Short term methods primarily consist of mulch/straw covering over the soils. Temporary and Permanent Seeding may be used if areas are to be left unworked for longer periods of time. During construction periods longer than 1 working week (7 days)where the soils are exposed and un-worked will use the proscribed methods in the Storm Water Management Manual for Western Washington to reduce sedimentation transported offsite. If winter grading is conducted, all exposed soils shall be covered within 2 days. BMP C120: Temporary and Permanent Seeding BMP C121: Mulching Element# 6: Protect Slopes The site contains no steep slopes; if steep slopes are created through temporary grading activities, slopes will be stabilized with surface roughening or seeding. BMP C120: Temporary and Permanent Seeding BMP C130: Surface Roughening JOB NO:17-1666-A 2