Construction Activities

    A number of documents are available on these pages that describe the regulations and programs aimed at preventing and controlling the discharge of pollutants to the municipal stormdrain system and receiving waters. Orange County lies within two different regions of the State Water Quality Control Board's jurisdiction: the Santa Ana Regional Water Quality Control Board and the San Diego Regional Water Quality Control Board.

    If there are any questions regarding the details of a document, or to obtain a hard copy or other alternative formats of the original document, or to have a document read to you, please contact the OC Public Works offices, Monday through Friday, 7:00 am to 5:00 pm PST, at 2301 N. Glassell St., Orange, CA, 92865 or by email at OC Watersheds, or by phone at (714) 955-0600.

    The following guidance manual was developed by the Orange County Stormwater Program to assist construction projects in Orange County with understanding how to comply with local and State stormwater runoff requirements:


    The following Best Management Practice Fact Sheets and Appendices are from the California Stormwater Quality Association (CASQA) Stormwater Best Management Handbook Portal: Construction.

    The County of Orange has obtained these documents through a subscription service available through the CASQA website at and has incorporated them into its Local Implementation Plan (LIP) which functions as the County’s stormwater management plan. The CASQA documents posted here are for individual use only and commercial reproduction is strictly prohibited without the prior written approval of CASQA.

    Erosion Control:

    Sediment Control:

    Tracking Control:

    Non-Stormwater Management:

    Waste Management BMPs:

    EC-1 Scheduling

    SE-1 Silt Fence

    TC-1 Stabilized Construction Entrance/ Exit

    NS-1 Water Conservation Practices

    WM-1 Material Delivery and Storage

    EC-2 Preservation of Existing Vegetation

    SE-2 Sediment Basin

    TC-2 Stabilized Construction Roadway

    NS-2 Dewatering Operations

    WM-2 Material Use

    EC-3 Hydraulic Mulch

    SE-3 Sediment Trap

    TC-3 Entrance/Outlet Tire Wash

    NS-3 Paving and Grinding Operations

    WM-3 Stockpile Management

    EC-4 Hydroseeding

    SE-4 Check Dam

    Wind Erosion Control:

    NS-4 Temporary Stream Crossing

    WM-4 Spill Prevention and Control

    EC-5 Soil Binders

    SE-5 Fiber Rolls

    WE-1 Wind Erosion Control

    NS-5 Clear Water Diversion

    WM-5 Solid Waste Management

    EC-6 Straw Mulch

    SE-6 Gravel Bag Berm

    NS-6 Illicit Connection/Discharge

    WM-6 Hazardous Waste Management

    EC-7 Geotextiles and Mats

    SE-7 Street Sweeping and Vacuuming


    NS-7 Potable Water/Irrigation

    WM-7 Contaminated Soil Management

    EC-8 Wood Mulching

    SE-8 Sandbag Barrier


    NS-8 Vehicle and Equipment Cleaning

    WM-8 Concrete Waste Management

    EC-9 Earth Dikes and Drainage Swales

    SE-9 Straw Bale Barrier


    NS-9 Vehicle and Equipment Fueling

    WM-9 Sanitary/Septic Waste Management

    EC-10 Velocity Dissipation Devices

    SE-10 Stormdrain Inlet Protection


    NS-10 Vehicle and Equipment Maintenance

    WM-10 Liquid Waste Management

    EC-11 Slope Drains

    SE-11 Chemical Treatment/Active Treatment Systems


    NS-11 Pile Driving Operations


    EC-12 Streambank Stabilization

    SE-12 Manufactured Linear Sediment Controls


    NS-12 Concrete Curing


    EC-13 Reserved

    SE-13 Compost Sock Berms


    NS-13 Concrete Finishing


    EC-14 Compost Blanket

    SE-14 Biofilter Bags


    NS-14 Material Over Water


    EC-15 Soil Preparation / Roughening



    NS-15 Demolition Adjacent to Water


    EC-16 Non-Vegetative Stabilization






                                  Stormwater Pollution Prevention Plan Outline (Word)  

                                   Rain Event Action Plan Template (Word) 

                                   Field Monitoring and Analysis Guidance (Field Logs)   

                                  SWPPP Template (Word Version)