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Riverview Apartments <br />Stormwater Pollution Prevention Plan <br />• <br />• <br />is <br />2.1.5 Element 5: Stabilize Soils <br />Exposed and unworked soils shall be stabilized with the application of effective BMPs to prevent <br />erosion throughout the life of the project. <br />In general, cut and fill slopes will be stabilized as soon as possible and soil stockpiles will be <br />temporarily covered with plastic sheeting. All stockpiled soils shall be stabilized from erosion, <br />protected with sediment trapping measures, and where possible, be located away from storm <br />drain inlets, waterways, and drainage channels. <br />Exposed and unworked soils will be stabilized according to the time period set forth for dry and <br />wet seasons as outlined below: <br />West of the Cascade Mountains Crest <br />Season <br />Dates <br />Number of Days Soils Can <br />be Left Exposed <br />During the Dry Season <br />May 1 — September 30 <br />7 days <br />During the Wet Season <br />October 1 — April 30 <br />2 days <br />Soils must be stabilized at the end of the shift before a holiday or weekend if needed based on <br />the weather forecast. <br />Anticipated project dates: Start date: Winter 2019 End date: Spring 2021 <br />Will you construct during the wet season? <br />® Yes ❑ No <br />List and describe BMPs: BMP C121: Mulching <br />BMP C123: Plastic Covering <br />BMP C125: Topsoiling/Composting <br />BMP C126: Polyacrylamide (PAM) for Soil Erosion Protection <br />BMP C250: Construction Stormwater Chemical Treatment <br />Installation Schedules: <br />Inspection and Maintenance plan: <br />Responsible Staff: <br />CPH Project No. 0024-17-037 <br />CP I H CONSULTANTS <br />August 28, 2018 <br />Page 10 <br />