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• Construct a horseshoe shaped berm, faced with coarse aggregate if <br /> using riprap, 3 feet high and 3 feet wide, at least 2 feet from the inlet. <br /> • Construct a horseshoe shaped sedimentation trap on the outside of the <br /> berm sized to sediment trap standards for protecting a culvert inlet. <br /> Maintenance • Inspect catch basin filters frequently, especially after story events. <br /> Standards Clean and replace clogged inserts. For systems with clogged stone <br /> filters:pull away the stones fiom the inlet and clean or replace. An <br /> alternative approach would be to use the clogged stone as fill and put <br /> fresh stone around the inlet. <br /> • Do not wash sediment into storm drains while cleaning. Spread all <br /> excavated material evenly over the surrounding land area or stockpile <br /> and stabilize as appropriate, <br /> Apprrn)ed as Ecology has approved products as able to meet the requirements of EMP <br /> Equh,alent C220. The products did not pass through the Technology Assessment <br /> Protocol--Ecology (TAPE)process. Local jurisdictions may choose not <br /> to accept this product approved as equivalent, or may require additional <br /> testing prior to consideration for local use. The products are available for <br /> review on Ecology's website at <br /> lattp://www,ecy wa._gov/programs/wq/stormwater/newtech/egiuvaleiit.html <br /> Volume II—Construction Sto»mvater Polhrtion Pre},ention-August 2012 <br /> 4-84 <br />