Resources for Projects During Construction

Raul M. Rojas, County Purchasing Agent, Director, Public Works
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Resources and Stormwater Best Management Practices for Construction Projects

The following resources will assist construction contractors, engineers, property owners, and municipal staff in preventing stormwater pollution at active construction sites. Open the panels to find what you need.

  • Construction project may be required  to submit an Erosion and Sediment Control Plan (ESCP) or a Stormwater Pollution Prevention Plan (SWPPP). Explore the Construction Site Stormwater Management Requirements panel to determine requirements.

 

Construction Site Stormwater Management Requirements

Effective June 30, 2015 New or Updated Erosion Control Plans Required

Some active construction projects must comply with expanded erosion and sediment control requirements to protect local creeks, bays and the ocean.

For projects that will include soil disturbance during construction, applicants must submit an Erosion and Sediment Control Plan (ESCP) for approval by the municipality prior to the issuance of certain permits, including all Grading Permit, most Building Permits, other permits at the discretion of the municipality (e.g. Encroachment or Demolition Permits with potential for significant erosion or non-stormwater discharges), and projects designated by local authorized official or designated municipal staff.

The purpose of the ESCP is to:

  • Identify potential pollutant sources that may affect the quality of stormwater runoff discharges from the construction site.
  • Document the Best Management Practices (BMPs) that will be implemented and placed in order to prevent, to the maximum extent practicable, construction site pollutants from leaving the site and entering the storm drain system during all phases of construction.
  • Document erosion control, sediment control, and good housekeeping BMPs that must be implemented year round as appropriate based on construction activities.

The ESCP may require modification as the project progresses and as conditions warrant. All modifications to the approved ESCP must be submitted to the municipality for review and approval.  Open the MCSTOPPP Erosion and Sediment Control Plan Applicant Package to get started.

If a project disturbs one acre or more of soil, it is subject to the State’s Construction General Permit (CGP). In this circumstance, the Stormwater Pollution Prevention Plan (SWPPP) developed pursuant to the CGP may substitute for the ESCP.

What should be in the Erosion and Sediment Control Plan

The Erosion and Sediment Control Plan ESCP applicant package provides templates for ease of preparation. The sections require the following information be provided:

  1. Project Information 
  2. Applicant Information                      
    • owner
    • contractor                           
  3. Other Required Permits (if captured)                      
  4. Site Plan BMP Implementation Schedule

    • plan sheets
    • BMP locations    
    • schedule of site-specific BMPs implemented year round          
  5. BMP information                        
    • rationale for selecting BMP including, if needed, soil loss calculations

Important information to consider

  • Most projects with disturbed soil that require a Building or Grading Permit must develop an Erosion and Sediment Control Plan (ESCP) and implement BMPs year-round.  
  •  If an ESCP is required, a Building or Grading Permit will not be issued without written approval of the ESCP or Stormwater Pollution Prevention Plan.
  • Prior to disturbing soil, provide evidence that all outside agency permits have been obtained.
  • ESCP changes must be approved by the local permitting agency.
  • Active projects must submit a revised ESCP for approval. Continue implementing current BMPs/Erosion and Sediment Control Plans until June 30, 2015.
  • Applicants may need to consider BMPs beyond the minimum control measures if warranted by site conditions and planned construction activities.
  • Projects subject to other permits (e.g., CGP, Section 404 Permit) must address the minimum MCSTOPPP control measures as well as the BMPs required by the other permit(s).
  • For an overview open the ESCP section of November 12, 2014 Stormwater Construction Workshop

Best Management Practices for Construction Activities

 General Information

During construction activities pollutants must be controlled to prevent water or wind from carrying them offsite. Common construction site pollutants include, but are not limited to:

  • Sediment from soil erosion or stockpiles 

  • Construction material and waste (paint, solvents, concrete, drywall, etc.)

  • Landscaping runoff containing fertilizers, pesticides, and top dressings

  • Spilled oil, fuel, and other fluids from construction vehicles and equipment

  • Non-storm discharges (dewatering trenches, dust control, washing equipment)

To protect stormwater quality, implement best management practices (BMPs) to minimize pollutant exposure, protect exposed pollutants, and remove any pollutants that accidently enter stormwater runoff. The major categories BMPs are erosion control, sediment control, and good housekeeping. The following documents information on effective best management practices:  

  • Minimum Erosion/Sediment Control Measures:  Marin County Stormwater Prorgram created a schematic illustrating typical Erosion and Sediment Control Practices for small projects, for example single family home construction.
  • Blueprint for a Clean Bay provides a summary of best management practices to prevent stormwater pollution from construction-related activities.

Sediment and Erosion Control

The following documents contain sediment and erosion control best management practices.

  • Cal Trans Interactive Training Modules Construction site best management practices videos on silt fences SC-1, fiber rolls/straw wattles SC-5, gravel bag berms SC-6, sand bag barriers SC-8, and storm drain inlet protection SC-10.
  •    

  • Erosion and Sediment Control Field Manual provides descriptions and schematic drawings of best management practices (BMPs) for construction site planning and management, erosion and sediment control, pollution prevention and sampling guidelines. It is available for purchase through Association of Bay Area Governments (ABAG). 

Long term Erosion Repair Guidance

  • Repairing Creekbank Erosion provides information on who to call for permits, how to outline the project before you begin, the steps to take, and how to follow up on your repair.

Construction Materials and Wastes

  • Cal Trans Interactive Training Modules Construction site best management practices videos on material delivery storage WM-1, stockpile management  WM-3, spill prevention control WM-4, solid waste management WM-5 and concrete waste management WM-8.
  • Pollution Prevention - It's Part of the Plan Includes best practices for contaminated soils, paving, dewatering, sawcutting, material storage, waste disposal, hazardous materials management, painting, landscaping, vehicle and equipment maintenance.

  • Prevención de la Contaminación - es Parte del Plan (Spanish version of Pollution Prevention…) Actividaded de suelos contaminados, trabajos de pavimentación, operaciones de desaguado,uso de serruchos, almacenamiento de materials y disposición de rediduous, manejo de materiales peligrosos, pintura, jardinería ornamental, y mantenimiento de equipo y vehículos.

  • Fresh Concrete and Mortar Application Includes proper procedures to prevent illegal discharges from these applications. Fresh concrete and mortar are considered pollutants in storm drains, creeks, and bays because they are toxic to fish and the aquatic environment.

Non-Stormwater

Local and State Requirements

Marin Community Currently Regulated Construction Sites

• Since 2003 Marin has implemented the Phase II permit including construction site performance standards

• Local ordinances require landowners and construction site operators to control construction site runoff and protection of water quality

Recent changes to the Phase II permit require changes to local construction site controls

• An important change affects the Erosion and Sediment Control Plans for existing and planned projects

Projects Disturbing Over 1 Acre or More of Soil

State of California’s Construction General Permit requires Construction General permit coverage by filing a Notice of Intent (NOI) to comply.

• Subject construction activity to this permit includes clearing, grading and disturbances to the ground such as stockpiling or excavation

• Does not include regular maintenance activities performed to restore the original line, grade or capacity of the facility

• Requires Development of a Stormwater Pollution Prevention Plan prepared by a Qualified SWPPP Developer (QSD)

• Submit Notice of Intent (NOI), Risk Assessment, Site Map, Stormwater Pollution Prevention Plan and Annual Fee prior to the start of construction.

• Implement a Stormwater Pollution Prevention Plan with a Qualified SWPPP Practitioner (QSP) or QSD.

• Projects that prepare a SWPPP required by the State Construction General Stormwater Permit can submit their SWPPP in-lieu of the Erosion and Sediment Control Plan required by local stormwater program requirements.

• More information about the Construction General Permit is at the State Water Resources Control Board's web site .

Post Construction Permit Requirements

• Certain size projects install bioretention facilities to treat the urban runoff

• If the construction project includes these treatments, please be familiar with the stormwater construction checklist in the project's Stormwater Control Plan

• The BASMAA Post Construction Manual provides information on these projects and Appendix B contains a generic construction checklist for the bioretention facilities

Stormwater Pollution Prevention Plan - SWPPP Resources

The State General Construction Permit requires the development and implementation of a Storm Water Pollution Prevention Plan (SWPPP).

  • The SWPPP must be prepared by a Qualified SWPPP developer (QSD) and should contain a site map(s) which shows the construction site perimeter, existing and proposed buildings, lots, roadways, storm water collection and discharge points, general topography both before and after construction, and drainage patterns across the project.

  • The SWPPP must list Best Management Practices (BMPs) the discharger will use to protect storm water runoff and the placement of those BMPs.

  • Additionally, the SWPPP must contain a visual monitoring program; a chemical monitoring program for "non-visible" pollutants to be implemented if there is a failure of BMPs; and a sediment monitoring plan if the site discharges directly to a water body listed on the 303(d) list for sediment. 

  • Section A of the Construction General Permit describes the elements that must be contained in a SWPPP.

The following documents may assist you in your SWPPP preparation:

Trainings

Caltrans Interactive Training Modules  for Construction Site Temporary Best Management Practices (BMPs) Modules include: intro to sediment control practices, silt fences, fiber rolls, gravel bag berms, Street sweeping, sand bag barriers, storm inlet protection, stabilized construction entrances, tire wash outlets,  stockpile  management, spill prevention control, solid waste management, concrete waste management, site record keeping and other topics.

Presentation from the 2015 Construction Stormwater Workshop: Marin Erosion and Sediment Control Requirements by Sandy Matthews covers Construction Stormwater Best Management Practices, Erosion and Sediment Control Plans, and Erosion and Sediment Control Inspections.

Construction Stormwater Management Compliance Workshop A presentation for the 2011  Workshop. Covers site management (erosion control, sediment control, pollution prevention practices and inspections) state permit requirements overview, risk determination, local requirements, site monitoring practical field tools, and becoming a QSD or QSP.

Storm Water Quality Construction Site Compliance / ControlsA presentation by Scott Taylor, P.E., RBF Consulting for the 2009 Marin Construction Stormwater Management Compliance Workshop. Covers regulatory responsibilities, overview of NPDES and SWPPP, Inspection and Enforcement, and examples of good and bad practices.

Stormwater Protection Requirements for Development Projects in Marin County A presentation for the 2009 Marin Construction Stormwater Management Compliance Workshop. Covers MCSTOPP’s role, prior Phase II stormwater permit, requirements from local Management Plan, ordinances in Marin, prior post construction requirements.