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STORMWATER SITE PLAN May 10,2017 <br /> OAKES AVENUE APARTMENTS PAGE 10 <br /> Element#6: Protect Slopes <br /> There are no natural, steep slopes on the site. A building is proposed within 5ft of the property <br /> line with excavations approximately 7ft deep. Temporary cut slopes steeper than 1H:1V shall be <br /> shored.There are no permanent slopes expected. Utility trenching will exist but is not expected <br /> to be exposed any longer than necessary. <br /> Element#7: Protect Drain Inlets <br /> Local catchbasins subject to potential runoff from disturbed areas will be protected with filter <br /> inserts. <br /> Element#8:Stabilize Channels and Outlets <br /> A temporary swale may be used for construction stormwater routing and management. <br /> Sediment free discharge may be pumped to the existing catch basin in the southeast corner of <br /> the northern adjacent lot. Reroute discharge to on-site storm system as practicable. Stabilize <br /> temporary swales with wattles, check dams and as necessary to trap sediment. <br /> No other channels or outlets are proposed on this project; no discharge to offsite channels is <br /> proposed. <br /> Element#9: Control of Pollutants <br /> All pollutants, including waste materials and demolition debris, that occur onsite shall be <br /> handled and disposed of in a lawful manner that does not cause contamination of stormwater <br /> runoff. Good housekeeping and preventative measures shall be taken to ensure that the site is <br /> kept clean, well organized, and free of debris. If required, bmps to be implemented to control <br /> specific sources of pollutants are discussed below. <br /> Vehicles, construction equipment, and/or petroleum product storage/dispensing: <br /> • All vehicles, equipment, and petroleum product storage/dispensing areas shall be <br /> inspected regularly to detect any leaks or spills, and to identify maintenance needs to <br /> prevent leaks or spills. <br /> • On-site fueling tanks and petroleum product storage containers shall include secondary <br /> containment. <br /> • Spill prevention measures, such as drip pans, shall be used when conducting <br /> maintenance and repair of vehicles or equipment. <br /> • In order to perform emergency repairs on site, temporary plastic or other appropriate <br /> barrier shall be placed beneath and, if raining, over the vehicle. <br /> • Contaminated surfaces shall be cleaned immediately following any discharge or spill <br /> incident. <br /> P:\Work(Sharefle)\Projects,2016\16-208 Rainier Building Co\CE\i)OCS\i)rain\2017 05 10 16-208 Oakes Drain Rpt.doe <br />