California Stormwater Quality Association
Presents
A Workshop Introducing the
California Stormwater
Best Management Practice Handbook
Industrial - Commercial
February 25, 2004
Workshop Agenda
 Welcome
 Introduction, Acknowledgements, and
Background
 Stormwater Pollution Prevention Planning
for Industrial and Commercial Facilities
 Break
 Selecting BMPs

Source Control BMPs

Commercial Guide Sheets
 Municipal Industrial Stormwater Program
Workshop Purpose
 Introduce the California Stormwater Quality
Handbooks

New Development and Redevelopment
Handbook (New)

Construction Handbook (Updated)

Industrial – Commercial Handbook (Updated)

Municipal Handbook (Updated)
 Provide a detailed overview of the Industrial -
Commercial Handbook
California Stormwater
Best Management Practice Handbook
Industrial - Commercial
Introduction, Acknowledgements and
Background
Presented by
Jeff Endicott
CDM
California Stormwater Quality
Association
1993 - 2003
2003 - ?
The Association remains focused on
the same mission
 Members benefit from the collaborative
environment
 Timely information on regulatory changes
 Presentations on the leading edge of stormwater
quality management
 Provides a forum for a common voice on statewide and national stormwater issues
Assist in the development and implementation of
meaningful and feasible stormwater programs
A diverse member base represents the
different stormwater perspectives
 Phase I MS4s
 Phase II MS4s
 Port Districts
 Industries
 Federal facilities
 Water agencies
 Consultants
 Industry associations
 Vendors
 Law firms
State Board and Regional Board Staff, and US EPA
Region 9 staff remain actively involved in CASQA
There are several membership options
 Membership is open to holders of NPDES stormwater
permits
 Affiliate membership is available to storm water
professionals, trade associations or non-profit groups
 Directors are elected from the NPDES permit holding
members, and two at large members
 The Executive Program Committee is drawn from all
classes of members
And many ways to get involved
Board of Directors (9 MS4, 2 At-Large)
Finance Committee
Executive Program Committee
(27 Members, mix of all categories)
Membership Committee
Subcommittees
Industrial
Stormwater
monitoring &
science
Legislation
Public
Involvement
Watershed Mgmt &
Impaired Waters
Pesticides
Phase II
Stormwater
Policy &
Permitting
BMP
Handbooks
Construction
Workshop Development
For 14 years this association has been
a leading voice in stormwater issues
Comments on permit development and develop
guidance to assist dischargers
 Developed consensus receiving water language
and comment of precedent setting orders
 Input on permit fee structure
 Forum for exchange of public information program
information and media campaign coordination
 Comment on re-registrations that may affect water
quality
 Educate dischargers on TMDLs and provide input
into their development

And the list goes on…
Where to get more information
 CASQA Web site

www.casqa.org
 California BMP Handbooks Web site:

www.CABMPHandbooks.com
 Sign up for the meeting notice e-mail list

kashby@lwa.com
Questions?
California Stormwater
Best Management Practice Handbook
Industrial - Commercial
Acknowledgements
Acknowledgements – Project Funding
 State Agencies
 Special Districts

State Water Resources
Control Board

Fresno Metropolitan
Flood Control District

Department of
Transportation

Port of San Diego

Riverside County Flood
Control and Water
Conservation District

San Bernardino County
Flood Control District

Vallejo Sanitation and
Flood Control District

Ventura County
Watershed Protection
District
Acknowledgements – Project Funding
 County Agencies
 County Agencies

Alameda County

Santa Barbara County

Contra Costa County

Santa Clara County

Los Angeles County

San Diego County

Marin County

San Mateo County

Orange County

Siskiyou County

Sacramento County
Acknowledgements – Project Funding
 Municipalities
 Municipalities

City of Bakersfield

City of Sacramento

City of Carmel

City of San Diego

City of Fairfield

City of Santa Rosa

City of Lodi

City of Stockton

City of Long Beach

City of Visalia

City of Modesto

City of Watsonville

City of Monterey

City of Woodland
Acknowledgments – Steering
Committee
 Scott Taylor, Chair, RBF
Consulting
 Bruce Fujimoto, State
Water Resources Control
Board
 Naresh Varma, San
Bernardino County Flood
Control District
 Karen Ashby, Orange
County Public Facilities
and Resources Department
 Bill Busath, City of
Sacramento
 Steve Stump, Riverside
County Flood Control and
Water Conservation District
 Mark Wills, Riverside
County Flood Control and
Water Conservation District
 Melinda Marks, Fresno
Metropolitan Flood Control
District
Acknowledgements – Technical
Advisory Committee
 Scott Taylor, Chair, RBF
Consulting
 Jennifer Gonzales, City of
Monterey
 John Johnston, California
State University
Sacramento
 Xavier Swamikannu, Los
Angeles Regional Water
Quality Control Board
 Tim Piasky, Building
Industry Association and
Associated General
Contractors
 Karen Henry, City of San
Diego
 U.S. Environmental
Protection Agency
 Marco Metzger, California
Department of Health
Services
 Jerry Marcotte, California
Department of
Transportation
 Dan Barber, Concrete
Industries
 Jill Bicknell, EOA, Inc.
Acknowledgements – Consultant Team
 CDM
 Larry Walker Associates

Jeff Endicott, P.E.

Mack Walker, P.E.

Janelle Rogers, Ph.D., P.E.(WA)

Heather Kirschmann

Don Schroeder, P.E.

Eric Simon

Luis Leon, P.E.

Dean Messer, Ph.D.
 Geoff Brosseau
 Gary Minton, Ph.D., P.E.
 Mike Barrett, Ph.D., P.E.(TX)
(WA)
 Catalyst

Tom Richman, ASLA,
AICP
California Stormwater
Best Management Practice Handbook
Industrial - Commercial
Background
Stormwater Pollutants & Water Quality
 Stormwater runoff naturally contains
numerous constituents
 Urbanization and urban activities, including
industrial and commercial facilities and
activities, may introduce additional
constituents to runoff that can adversely
impact water quality

Sediment

Metals

Nutrients

Organics

Bacteria and viruses

Pesticides

Oil and grease

Trash
Project Lifecycle and the Handbooks
DEVELOPMENT
RAW
LAND
PROJECT
PLANNING
AND
DESIGN
PROJECT
CONSTRUCTION
PROJECT
O&M
REDEVELOPMENT
Development
Handbook
Construction
Handbook
Municipal
Handbook
Indus. – Comm.
Handbook
Focus of this Workshop
Industrial - Commercial
Purpose of the Handbook
 Provide guidance on selecting and
implementing best management practices
(BMPs) to reduce pollutants in runoff from
industrial facilities and selected commercial
businesses
 The handbook will assist in meeting
regulatory requirements related to industrial
and commercial sites and activities
Users of the Handbook
 Individuals involved in controlling urban
runoff pollution from industrial and
commercial sites
 Operators and owners of industrial and
commercial facilities

That are required to obtain NPDES permit
coverage for their discharges

That are not required to obtain NPDES permit
coverage for their discharges but are
committed to implementing BMPs for their
site and activities
Handbook Organization
Section 1
Introduction
Section 2
Stormwater Pollution Prevention Planning for
Industrial and Commercial Facilities
Section 3
Section 4
Source Control BMPs
Treatment Control BMPs
Section 5
Section 6
Monitoring, Reporting,
and Program Evaluation
Glossary and List of
Acronyms
Page 1-2
Organization of the Handbook
 Appendix A – General Industrial Activities
Storm Water Permit
 Appendix B – Stormwater Discharges
Associated with Industrial Activities
 Appendix C - Sample SWPPP
 Appendix D - Business Category Stormwater
Pollution Control Guide Sheets
Regulatory Requirements
SWRCB and RWQCB
Inspection
Enforcement
Municipal NPDES
Permit
Industria l General NPDES
Permit or Industry
Specific NPDES Permit
INDUSTRY
SWPPP
Monitoring
MUNICIPAL DEFINED
INDUSTRIAL
PROGRAM
Inventory
Inspection
Enforcement
Figure 1-1
Ordinance and/or
Permitting
Acronyms
 BMP - Best Management Practice
 NOI – Notice of Intent
 NPDES – National Pollutant Discharge
Elimination System
 SWPPP – Stormwater Pollution Prevention
Plan
 SWPCP – Stormwater Pollution Control Plan
How to Get the Handbook
 Attend this workshop. Attendees each receive one
copy of the subject handbook
 Visit the California Stormwater Best Management
Practice Web Site

Download an entire handbook, an individual section,
an individual fact sheet, or an individual guide sheet

Search for BMPs

Check for handbook and fact sheet updates
www.cabmphandbooks.com
California Stormwater
Best Management Practice Handbook
Industrial - Commercial
Stormwater Pollution Planning for
Industrial and Commercial Facilities
Presented by
Malcolm Walker, P.E.
Larry Walker Associates
Document Organization
Section 1
Introduction
Section 2
Stormwater Pollution Prevention Planning for
Industrial and Commercial Facilities
Section 3
Section 4
Source Control BMPs
Treatment Control BMPs
Section 5
Section 6
Monitoring, Reporting,
and Program Evaluation
Glossary and List of
Acronyms
Planning Objectives
 Provide an approach to
develop a Stormwater
Pollution Prevention Plan
(SWPPP) consistent with
State General Permit
 Provide guidance to
selected commercial
businesses to reduce
pollutants in stormwater
discharges
SWPPP Objectives
 Identify source of pollution that affect
stormwater discharges and authorized
non-stormwater discharges
 Select and implement BMPs to reduce
pollutants in stormwater discharges
and authorized non-stormwater
discharges
Who Must Prepare a SWPPP
Figure 2-1
Six Phases of SWPPP Development
1. Planning and Organization
2. Assessment Phase
3. Best Management Practices Identification
4. Assembly Phase
5. Implementation Phase
6. Monitoring and Reporting
Based on Table 2-1
PHASE 1
1. Planning and Organization
2. Assessment Phase
3. Best Management Practices Identification
4. Assembly Phase
5. Implementation Phase
6. Monitoring and Reporting
PHASE 1
Planning & Organization
•Form Pollution Prevention Team
•Review Other Plans
•Review Other Requirements
Phase 1
Form Pollution Prevention Team
 Typically better to have lead person
 Team size reflect complexity of facility
 Likely overlap with other environmental
program
Phase 1
Review Other Plans and Requirements
 Site and drainage maps
 Existing monitoring data
 Environmental Management Plans
 Regional Board requirements regarding local
water bodies
PHASE 2
1. Planning and Organization
2. Assessment Phase
3. Best Management Practices Identification
4. Assembly Phase
5. Implementation Phase
6. Monitoring and Reporting
PHASE 2
Assessment Phase
 Develop site map
 Describe industrial activities
 Inventory significant materials and
chemicals
 List past significant spills
 Identify non-stormwater discharges
 Identify existing BMPs
 Assess potential pollution sources
 Complete an Assessment Summary
Phase 2
Develop Site Map
 Incorporate facility boundaries
 Drainage areas - run-on and direction of flow
 On-site or nearby water bodies
 Drainage conveyance system
 Impervious areas
 Industrial activities exposed to precipitation
 Existing control measures (BMPs)
Phase 2
Example Site Map
Phase 2
Describe Industrial Activities
 Identify Industrial Activities and
Associated Potential Pollutant Sources
 Identify Potential Pollutants
 Use Worksheet 1 Checklist
Phase 2
Worksheet 1
Phase 2
Identify Potential Pollutants
Table 2-2
Phase 2
Inventory Significant Materials and
Chemicals
 Typical materials

fuels

solvents

metallic products

hazardous material - Sec 101(14) of CERLCA

chemicals per Sec 313 of Title III SARA

fertilizers

pesticides
 Use Worksheets 2 and 3
Phase 2
For Materials Identified
 Locations where material is stored,
received, shipped, and handled
 Spill or leak procedures
 Typical quantities and frequency
 Containment structures
Phase 2
List Past Significant Spills
 Significant = adversely impact human health
or the environment or that cause or
contribute to a water standard violation
 Include information regarding
 type, characteristics of spilled material
 preventive measures and cleanup action
 quantity exposure to stormwater
 Use Worksheet 4
Phase 2
Identify Non-stormwater Discharges
 Determine source, quantity, frequency and
characteristics
 Certain non-stormwater discharges are
allowed but may vary between Regional
Boards
 Certification required
 Use Worksheets 5 and 6
Phase 2
Typically Authorized Non-stormwater
Discharges
 Fire hydrant flushing
 Potable water sources
 Drinking fountain water
 Landscape watering
 Atmospheric condensates
 Groundwater
 Foundation/footing drainage
 Springs
Phase 2
Identify Existing BMPs
 Likely existing BMPs present

sweeping

covered storage bins

spill prevention and cleanup
procedures
 Use Worksheet 7
checklist
Phase 2
Assess Potential Pollution Sources
 Objective: To determine which areas and
activities are likely sources of pollutants in
stormwater and non-stormwater discharges.
 Narrative assessment
 Judgmental decision
 Use Worksheet 8
Phase 2
Evaluation Factors
 Status of current BMPs
 Quantities of materials handled, produced,
stored or disposed of
 Likelihood of exposure
 History of spills or leaks
 Run-on from outside sources
Phase 2
Other Considerations in Assessing
Pollution Sources
 Dust generating activities
 Soil erosion potential
 Existing stormwater monitoring data
 Supplemental field studies
PHASE 3
1. Planning and Organization
2. Assessment Phase
3. Best Management Practices Identification
4. Assembly Phase
5. Implementation Phase
6. Monitoring and Reporting
PHASE 3
BMP Identification
 Identify erosion and sediment controls
 Identify BMPs for non-stormwater
 Identify source control BMPs
 Identify treatment control BMPs
 Prepare BMP list and prioritize
 Prepare Monitoring Plan
 Prepare Implementation Plan
Phase 3
Prepare BMP List and Prioritize
 Summarize BMPs list

Existing BMPs

Existing BMPs to be revised

New BMPs
 Develop implementation schedule reflecting
water quality concerns, costs, and ease of
implementation.
Phase 3
Prepare Monitoring Plan
 Objectives

Monitor quality of discharges

Aid in SWPPP implementation

Measure BMP effectiveness
 Elements

Visual observations

Stormwater analytical
monitoring

Authorized non-stormwater
monitoring
Phase 3
Prepare Implementation Plan
 Designate personnel responsible for SWPPP
 Schedule Comprehensive Site Compliance
Evaluation
 Establish how records of inspections, followup actions and BMP implementation will be
prepared and kept
 Develop training program
PHASE 4
1. Planning and Organization
2. Assessment Phase
3. Best Management Practices Identification
4. Assembly Phase
5. Implementation Phase
6. Monitoring and Reporting
PHASE 4
Assemble SWPPP
 Obtain Required Signatures
 Select Plan Location
 Assemble Document
PHASE 5
Implementation
1. Planning and Organization
2. Assessment Phase
3. Best Management Practices Identification
4. Assembly Phase
5. Implementation Phase
6. Monitoring and Reporting
Phase 5 - Implement SWPPP
 Conduct Training
 Implement BMPs
 Terminate unauthorized non-
stormwater discharges
Phase 5
Implementation Training
 Annual training of personnel responsible for
BMP implementation
 Address

Inspections

Sampling

Reporting

BMPs - good housekeeping, material
handling procedures, etc.
 Record training efforts
Phase 5
BMP Implementation
 Schedule may be developed

BMP implementation

Maintenance

Inspection

Evaluation
 Terminate Non-allowable
Non-storm Discharges
PHASE 6
Monitoring and Reporting
1. Planning and Organization
2. Assessment Phase
3. Best Management Practices Identification
4. Assembly Phase
5. Implementation Phase
6. Monitoring and Reporting
Document Organization
Section 1
Introduction
Section 2
Stormwater Pollution Prevention Planning for
Industrial and Commercial Facilities
Section 3
Section 4
Source Control BMPs
Treatment Control BMPs
Section 5
Section 6
Monitoring, Reporting,
and Program Evaluation
Glossary and List of
Acronyms
Phase 6
Monitoring, Reporting, and Evaluation
Elements
 Conduct Monitoring Program
 Conduct Record Keeping and Reporting
 Conduct Annual Site Evaluation
Phase 6
Conduct Monitoring Program
 Objectives

To monitor the quality of stormwater
discharges

To aid in SWPPP implementation

To measure BMP
Effectiveness
Phase 6
Conduct Monitoring Program
(continue)
 Elements

Training

Visual observation

Stormwater monitoring

Authorized non-stormwater
discharges
Phase 6
Monitoring Training
 Review of Monitoring Plan and Health &
Safety Plan
 Review sampling protocols
 Classroom and field sessions
 Annual refresher
Phase 6
Visual Observations
 Stormwater and non-stormwater
observations
 Objectives

Document presence of any
discoloration, odors, oil and
grease, etc.

Identify sources of pollutants
and non-stormwater flows
Phase 6
Visual Observations (continue)
 Quarterly inspection of authorized and
unauthorized non-stormwater discharges
 One storm event per year
 Daylight hours
 Information recorded

date and locations

observations

follow up action
Phase 6
Stormwater Monitoring
 Group vs individual
 Considerations

representativeness

personal safety

site access

equipment security

adequate flow volume

utility access
Phase 6
Stormwater Monitoring (continue)
 Sampling and preservation in accordance w/
Standard Methods
 Equipment properly calibrated
 Laboratory analysis according to 40 CFR
Part 136
 Mandatory constituents

TSS, pH, specific conductance, and TOC
 Discretionary constituents
Phase 6
Establish Procedures to Prevent
Sample Contamination (Typical)
 No smoking
 Never sample near a running vehicle
 Wear clean, powder-free nitrile gloves when
handling bottles, tubes, strainers, etc.
 Do not eat or drink during sample collection
 Avoid rain dripping into sample bottles
Page 5-4
Phase 6
Conduct Record Keeping and
Reporting
 Date, place & time
 QA/QC records
 Parties conducting
 Observations
monitoring
 Flow measurements
 Analytical results,
method detection limits
& analytical techniques
 Calibration &
maintenance records
 Sampling and analysis
exemptions/reductions
 Corrective actions
 Rain event data
Phase 6
Annual Report
 Summary of visual
observations
 Evaluation of
observations and
analytical results
 Documentation of
BMP implementation
 Laboratory results
 Comprehensive Site
Compliance
Evaluation Report
 Documentation
 Detection limits
Phase 6
Conduct Annual Site Evaluation
 Review visual observations and results
 Review and evaluation of BMPs
 Review of current site activities
 Review of current list of significant
materials
 Review of spills over the last 12 months
 Evaluation Report
Commercial Businesses
 SWPPP not required however
local jurisdictions may impose
requirements
 Plan should be developed to

Identify pollutant generating
activities

Selecting and implementing BMPs

Review and modify plan to ensure
effective implementation
Question and Answer
California Stormwater
Best Management Practice Handbook
Industrial Handbook
Source Control and Treatment Control
BMPs
Presented by
Geoff Brosseau
Document Organization
Section 1
Introduction
Section 2
Stormwater Pollution Prevention Planning for
Industrial and Commercial Facilities
Section 3
Section 4
Source Control BMPs
Treatment Control BMPs
Section 5
Section 6
Monitoring, Reporting,
and Program Evaluation
Glossary and List of
Acronyms
Terminology
 Nonstructural BMPs
 Structural BMPs
 Source Control BMPs
 Treatment Control BMPs
Source Controls
Operational practices that reduce
potential pollutants at the source
Identify BMPs for Non-stormwater
Discharges
 Options


Terminate
Obtain separate permit
 Authorized non-stormwater
discharges - may still require BMPs
Identify Source Control BMPs
 80% of problem solved with 20% of
effort
 Start with low to modest cost BMPs
 Typical effective source control BMPs

Berms

Overhead coverage

Secondary containment

Moving indoors

Designating wash areas
Example Source Control BMPs
Good BMPs = Covered, stored on
concrete surface, locked gates
Bad BMPs = Stored outdoors,
uncovered on permeable surface
Fact Sheet Types
 Activity-based
 Common activities
 Example – fueling
 16 BMPs
 Business-category
 Common businesses
 Example - food service
 14 BMPs
Activity-Based BMPs
 Non-Stormwater Management

SC-10 Non-Stormwater Discharges

SC-11 Spill Prevention, Control, and Cleanup
 Vehicle and Equipment Management

SC-20 Vehicle and Equipment Fueling

SC-21 Vehicle and Equipment Cleaning

SC-22 Vehicle and Equipment Repair
Activity-Based BMPs (cont’)
 Material and Waste Management

SC-30 Outdoor Loading / Unloading

SC-31 Outdoor Liquid Container Storage

SC-32 Outdoor Equipment Operations

SC-33 Outdoor Storage of Raw Materials

SC-34 Waste Handling and Disposal

SC-35 Safer Alternative Products
Activity-Based BMPs (cont’)
 Building and Grounds Management

SC-40 Contaminated or Erodible Soils

SC-41 Building and Grounds Maintenance

SC-42 Building Repair and Construction

SC-43 Parking / Storage Area Maintenance

SC-44 Drainage System Maintenance
BMP Fact Sheets
 Laundry list – Some information may not be
applicable
 Consider modifying / simplifying, as needed
 Copies

Photocopy Handbook pages

Download from:
www.cabmphandbooks.com
Fact Sheet Elements
 Description
 Approach

Pollution Prevention

Suggested Protocols (including equipment needs)

Training

Spill Response and Prevention

Other Considerations (limitations and regulations)
Fact Sheet Elements (cont’)
 Requirements

Costs (including capital and O&M)

Maintenance (including administration and
staffing)
 Supplemental Information

Further Details on the BMP

Examples
 References and Resources
Fact Sheet Example
Business-Category
Guide Sheets
 For the more common business types
 Most not required to obtain General
Permit coverage
 Guide sheets address a collection of
activities typical of these businesses
Business-Category
Guide Sheet BMPs
 Animal Care and Handling Facilities
 Automotive Service Facilities

Auto Recycling

Body Repair

Maintenance

Service Stations
 Food Service Facilities
 Marinas, Boatyards, and Ports
Business-Category
Guide Sheet BMPs (cont’)
 Mobile Cleaning

Transportation-Related

Food Service-Related

Surface Cleaning

Amenities
– Carpets and Upholstery
– Swimming Pools and Spas
– Water Softeners
 Landscape Maintenance
Guide Sheet Elements
 Description
 Pollutant Sources
 Approach
 Source Control BMPs
 Treatment Control BMPs
 More Information

Materials with more specific information

Other formats (e.g., posters, videos)
 References, including many web sites
Guide Sheet Example
Section 4 – Treatment Control
Best Management Practices (BMPs)
Treatment Controls
Treatment methods to remove
pollutants from stormwater
Consider Treatment Control BMPs
 Only if source control BMPs are
insufficient
 Consider when:

Must comply with numeric limit

More cost effective than elaborate source
control BMP

Pollutant of concern only addressed by
treatment control BMP
Design Considerations for Treatment
Control BMPs
 Isolate pollutant generating activity and
drainage system
 Locate BMP close to pollutant source
 Divert to sanitary sewer
 Design for maintenance
Maintenance Fact Sheets
 BMP Fact Sheets, including design
requirements, performance specifications,
and limitations in New and Redevelopment
BMP Handbook
 Maintenance Fact Sheets contained in:

Municipal BMP Handbook

Industrial and Commercial BMP Handbook
Treatment Control Types
 Public Domain
 Available to the public
 12 BMPs
 Manufactured (Proprietary)
 Purchased from vendor
 Typically patented
 5 BMPs
Public Domain BMPs
 Infiltration

TC-10 Infiltration Trench

TC-11 Infiltration Basin

TC-12 Retention / Irrigation
 Detention and Settling

TC-20 Wet Pond

TC-21 Constructed Wetland

TC-22 Extended Detention Basin
Public Domain BMPs (cont’)
 Biofiltration

TC-30 Vegetated Swale

TC-31 Vegetated Buffer Strip

TC-32 Bioretention
 Filtration

TC-40 Media Filter
Public Domain BMPs (cont’)
 Flow Through Separation

TC-50 Water Quality Inlet
 Other

TC-60 Multiple Systems
Manufactured (Proprietary) BMPs
 Detention and Settling

MP-20 Wetland
 Filtration

MP-40 Media Filter
 Flow Through Separation

MP-50 Wet Vault

MP-51 Vortex Separator

MP-52 Drain Inlet
Maintenance Fact Sheets
 Provide specific inspection and maintenance
frequencies as suggestions, your needs may
vary
 Consider modifying / simplifying, as needed
 Manufacturers typically have recommended
inspection schedules and maintenance
requirements for proprietary BMPs
Maintenance Fact Sheet Elements
 General Description
 Inspection / Maintenance Considerations
 Inspection Activities
 Maintenance Activities
 Additional Information
 References
Maintenance Fact Sheet Example
Example – Activities and Frequencies
Inspection Activities
Inspect after several storm events to confirm that the drainage
system functions, and bank stability and vegetation growth are
sufficient.
Maintenance Activities
Remove accumulated trash and debris in the basin, inlet/outlet
structures, side slopes, and collection system as required.
Suggested Frequency
Post construction
Suggested Frequency
Semi annual, after
significant storm
events
Remove sediment from outlet structure. Dispose of properly.
Perform vector control, if necessary.
Repair undercut areas and erosion to banks and basin.
Maintenance Program
 Database of properties / locations / owners-
operators
 Enforceable agreements – responsibilities /
access (e.g., maintenance agreement, service
contract)

with owners-operators

with maintenance service providers

with resource agencies (e.g., USFWS, DFG)
 Vector control plans
 Reporting
Question and Answer