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Conditions of Use <br /> Any time concrete is used, utilize these management practices.Concrete construction project com- <br /> ponents include, but are not limited to: <br /> . Curbs <br /> . Sidewalks <br /> . Roads <br /> . Bridges <br /> . Foundations <br /> . Floors <br /> . Runways <br /> Disposal options for concrete, in order of preference are: <br /> 1. Off-site disposal <br /> 2. Concrete wash-out areas(see BMP C154:Concrete Washout Area) <br /> 3. De minimus washout to formed areas awaiting concrete <br /> Design and Installation Specifications <br /> . Wash concrete truck drums at an approved off-site location or in designated concrete <br /> washout areas only. Do not wash out concrete trucks onto the ground(including formed areas <br /> awaiting concrete), or into storm drains, open ditches,streets,or streams. Refer to BMP <br /> C154:Concrete Washout Area for information on concrete washout areas. <br /> Return unused concrete remaining in the truck and pump to the originating batch plant <br /> for recycling. Do not dump excess concrete on site,except in designated concrete <br /> washout areas as allowed in BMP C154:Concrete Washout Area. <br /> . Wash small concrete handling equipment(e.g. hand tools,screeds,shovels, rakes,floats, <br /> trowels,and wheelbarrows)into designated concrete washout areas or into formed areas <br /> awaiting concrete pour. <br /> . At no time shall concrete be washed off into the footprint of an area where an infiltration fea- <br /> ture will be installed. <br /> . Wash equipment difficult to move,such as concrete paving machines, in areas that do not dir- <br /> ectly drain to natural or constructed stormwater conveyance or potential infiltration areas. <br /> . Do not allow washwater from areas,such as concrete aggregate driveways,to drain directly <br /> (without detention or treatment)to natural or constructed stormwater conveyances. <br /> . Contain washwater and leftover product in a lined container when no designated concrete <br /> washout areas(or formed areas,allowed as described above)are available. Dispose of con- <br /> tained concrete and concrete washwater(process water)properly. <br /> 2019 Soormwater Management Manual for Western Washington <br /> Volume ll-Chapter 3-Page 316 <br />