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Education <br /> • Discuss the concrete management techniques described in this BMP <br /> with the ready-mix concrete supplier before any deliveries are made. <br /> • Educate employees and subcontractors on the concrete waste <br /> management techniques described in this BMP. <br /> • Arrange for contractor's superintendent or Certified Erosion and <br /> Sediment Control Lead(CESCL) to oversee and enforce concrete <br /> waste management procedures. <br /> • A sign should be installed adjacent to each temporary concrete <br /> washout facility to inform concrete equipment operators to utilize the <br /> proper facilities. <br /> Contracts <br /> Incorporate requirements for concrete waste management into concrete <br /> supplier and subcontractor agreements. <br /> Location and Placement <br /> • Locate washout area at least 50 feet from sensitive areas such as stonn <br /> drains, open ditches, or water bodies, including wetlands. <br /> • Allow convenient access for concrete trucks,preferably near the area <br /> where the concrete is being poured. <br /> • if trucks need to leave a paved area to access washout,prevent track- <br /> out with a pad of rock or quarry spalls (see BMP C 105). These areas <br /> should be far enough away from other construction traffic to reduce <br /> the likelihood of accidental damage and spills. <br /> • The number of facilities you install should depend on the expected <br /> demand for storage capacity. <br /> • On large sites with extensive concrete work,washouts should be <br /> placed in multiple locations for ease of use by concrete truck drivers. <br /> On-site Temporary Concrete Washout Facility, Transit Truck <br /> Washout Procedures: <br /> • Temporary concrete washout facilities shall be located a minimum of <br /> 50 ft from.sensitive areas including storm drain inlets, open drainage <br /> facilities, and watercourses. See Figures 4.1.7 and 4.1.8. <br /> • Concrete washout facilities shall be constructed and maintained in <br /> sufficient quantity and size to contain all liquid and concrete waste <br /> generated by washout operations. <br /> Approximately 7 gallons of wash water are used to wash one truck <br /> chute. <br /> • Approximately 50 gallons are used to wash out the hopper of a <br /> concrete pump truck. <br /> Vohnne H—Construction Slonnwater Pollution Prevention-Angust 2012 <br /> A-48 <br />