Non-Stormwater And Waste/Material Management



This section describes proper hazardous waste handling procedures to prevent associated pollutants from entering stormwater.

Hazardous waste includes but is not limited to the following substances: petroleum products, concrete curing compounds, sanitary wastes, paints, stains, wood preservatives, asphalt products, pesticides, acids, solvents and roofing tar. If non-hazardous waste comes into contact with the above wastes, it is considered hazardous.

Sites with existing structures may contain wastes which must be disposed of in accordance with Federal, State, and local regulations, including: sandblasting grit mixed with lead, cadmium, or chromium-based paints; asbestos; and polychlorinated biphenyls (PCBs).

  • Refer to the applicable Material Safety Data Sheet (MSDS) for clean-up and reporting procedures for all hazardous spills.
  • Do not remove the original product label; it contains important safety and disposal information.
  • Use secondary containment berms in fueling areas.
  • Place hazardous waste collection containers at convenient locations.
  • All hazardous waste must be stored within secondary containment.
  • See Hazardous Materials BMP Section for additional guidelines.
  • Containers properly labeled: name, address, and US Environmental Protection Agency (EPA) identification (ID) number or ID number of generator listed (not required if contractor is an exempt small quantity generator).
  • Do not store different wastes in the same container. Do not store incompatible materials in the same temporary containment facility.
  • Hazardous waste shall be transported from the site by a licensed hazardous waste transporter and disposed of at an authorized, licensed disposal or recycling facility within 90 days of being accumulated.
  • Properly dispose of rain water removed from temporary containment areas that may have mixed with hazardous waste.
  • Educate contractor and subcontractors regarding identification, storage, and disposal of hazardous waste. Ongoing hazardous waste training should be included in regular safety meetings.


Materials that are collected and disposed of on-site in solid waste storage bins cannot come in contact with stormwater runoff.

Solid wastes include items such as:

  • Construction wastes including brick, mortar, timber, steel and metal scraps, pipe and electrical cuttings, non-hazardous equipment parts, styrofoam and other materials used to transport and package construction materials.
  • Scrap or surplus building materials including metals, rubber, plastic, glass pieces and masonry products.
  • Domestic wastes including food containers such as beverage cans, coffee cups, paper bags, plastic wrappers, and cigarettes.
  • Planting wastes, including vegetative material, plant containers, and packaging materials.
  • Solid waste should be stored at a location which is least likely to be flooded, and at a location away from a storm drain, natural waterway or drainage channel.
  • Use berms, dikes or other temporary diversion structures to protect stockpiled waste from contacting stormwater.
  • During rain events, waste materials need to be stored in watertight dumpsters and kept securely covered. Liquids must be kept out of dumpsters and waste receptacles. The areas around the dumpsters should be swept daily.
  • Provide an adequate number of trash receptacles on-site including field trailer areas and where workers gather for breaks except near drainage inlets, natural waterways or drainage channels. All litter within the construction site should be collected weekly, regardless of the litter’s origin. Litter needs to be removed from the site by a licensed solid waste contractor.
  • Provide an adequate amount of watertight dumpsters to collect the anticipated volume of construction waste. Also, plan for additional dumpsters to be delivered to the site and schedule additional pickups during demolition phases. Washing out dumpsters on the construction site is prohibited.

    Construction debris and waste should be removed from the site biweekly or more frequently as needed. Arrange for regular waste collection.


    This section describes proper procedures to prevent non-hazardous liquid wastes from entering the storm drain system. This section does not apply to the following: dewatering operations, solid wastes, hazardous wastes, concrete slurries, and liquid wastes covered by specific laws or permits.

    This BMP addresses non-hazardous liquid wastes:

    • Drilling slurries and fluids
    • Dredgings
    • Other non-storm water liquid discharges, which are not covered by separate permits
    • Grease and oil-free wastewater and rinse water
    • Use temporary dikes or berms to direct surface flow of liquid wastes to a containment structure or device. The containment area should be structurally sound, leak free, and have sufficient storage for anticipated volume.
    • Appropriate structures include holding pits, sediment basins, roll off bins and portable tanks. Locate the containment structure far from storm drains, natural waterways and drainage channels.
    • Some liquid wastes may require testing and certification that they are non-hazardous before an appropriate disposal method is selected.
    • Educate employees and subcontractors on liquid waste generating activities and liquid waste storage and disposal procedures.
    • Refer to Vehicle and Equipment Cleaning BMP when applicable.
    • Avoid spills or accidental releases of contained liquid wastes. Apply Spill Prevention and Control BMPs as needed.
      • Remove deposited solids in containment areas and capturing devices as needed, and at the completion of the task. Dispose of any solids as described in Solid Waste BMP.
      • Inspect containment areas and capturing devices and repair as needed.
      • Frequently inspect liquid waste containment areas and capturing devices for damage, and repair as needed.



      This section is particularly applicable when conducting construction in highly urbanized or industrial areas where soil contamination may have occurred due to spills, illicit discharges, and leaks from underground storage tanks.


      The procedures and practices presented in this BMP are general. The contractor should identify appropriate practices and procedures for the specific contaminants known to exist or discovered on-site.

      It is important to confirm a site assessment before moving earth.

      • Identify contaminated soils by investigating the following items. All suspected soils should be tested at a certified laboratory.
      • Past site uses and activities.
      • Detected or undetected spills and leaks.
      • Acid or alkaline solutions from exposed soil or rock formations high in acid or alkaline forming elements.
      • Contaminated soil as evidenced by discoloration, odors, differences in soil properties, abandoned underground tanks or pipes, or buried debris.
      • Contaminated soil is prohibited from entering storm drains, natural waterways or drainage channels.
      • Depending on the type of contamination, different handling requirements will need to be met. In some cases contaminated soils may need to be placed in steel barrels, sealed and removed from the site. This waste will need to be taken to a licensed hazardous waste disposal site. Along with this, soil testing for contaminants in stormwater may be required at the discretion of the Construction or Stormwater Inspector.
      • Avoid stockpiling contaminated soils. If stockpiling is necessary and allowed, cover the stockpile and install a berm around the pile to prevent runoff for secondary containment.



      Dewatering operations include the proper procedures for managing the discharge of stormwater and non-stormwater from the construction site.

      • Sediment treatment options include: sediment traps, dewatering tanks, weir tanks, cartridge filters and pressurized bag filters. See the CalTrans Dewatering Operations guidelines for further information regarding the tanks and filters.
      • The contractor is to provide a dewatering plan that details the location of dewatering activities, equipment and discharge point.
      • Retain water on the site for construction use. Re-use water for dust control, irrigation or another on-site purpose to the greatest extent possible.
      • Discharging construction site waste to the sanitary sewer is a final option and requires a Batch Wastewater Permit.
      • Appropriate wastewater treatment or off-site disposal will be required in those situations where the initial sampling and analysis reveal noncompliance with the applicable regulatory limits.
      • When flushing chlorinated water lines, test and remove all chlorine content before discharging to the sewer system.
      • Dewatering discharges must not cause erosion at the discharge point.

      Inspect all BMPs frequently, and repair or replace to ensure the BMPs function as designed. Accumulated sediment removed during maintenance of a dewatering device must be disposed of according to the Registered Engineer. If the sediment contains hazardous pollutants, it must be removed in accordance with the guidelines for Hazardous Waste.