The Concrete Washout System (CWS) from Cal-Waste is a watertight containment system that controls, captures and contains all of the caustic wastewater and concrete washout material from construction projects, eliminating any possibility of an illegal discharge. This system conforms to Caltrans and California Stormwater Quality Association (CASQA) Best Management Practices (BMP’s) for concrete waste and waste water management (WM8), and it is 100% Storm Water Pollution Prevention Plan (SWPPP) Compliant.  This proven technology is capable of holding approximately 5.5 yards of material – equivalent to 38 trucks and 2 concrete pumps or washout from 350 yards of poured concrete. All collected wastewater and concrete material is recycled.

Modern Technology

Cal-Waste’s CWS lets workers easily wash out concrete trucks, pumps and equipment on site, while also protecting storm drain systems from potential illegal discharges. This unique system replaces outdated washout systems that rely on plastic-lined hay bales which are costly, unsightly and damaging to the environment. Due to overuse, lack of maintenance and an inherent flaw in the material it uses, the older approach simply fails to contain illegal discharges effectively.


CWS has proven itself as the Best Available Technology (BAT) and the Best Management Practice (BMP) when it comes to concrete washout and wastewater containment and recycling. Cal-Waste’s washout systems are the preferred BMP on construction sites for their ability to reduce operation costs and reduce the mess and hassles often associated with other measures.


  • Cal-Waste’s Concrete Washout System is 100% Storm Water Pollution Protection Plan (SWPPP) Compliant.
  • Dimensions: 12’L X 8’W X 2’H / 25′ (with ramps extended)
  • Holding Capacity: 5.5 Cubic Yards (1100 Gallons) / Washout from 350 yards of poured concrete
  • Features and Advantages:
    • Exceeds US EPA, State EPA and Regional Guidelines
    • Conforms to Caltrans and CASQA BMP’s for Concrete Waste and Waste Water Management (WM8)
    • Self-Contained, Watertight and Portable Roll Off Bin Eliminates Wastewater Discharge
    • Easily Accessible
    • Allows Three Concrete Trucks to Washout Simultaneously
    • Steel Folding Ramps Accommodate Almost All Pumps