Water Quality Management Plans
for the
Santa Margarita Watershed
of
Riverside County
Basic Training
April 2011 Edition
Minor Changes April 2012
Updated June 2013
Why are we here?
 Storm water and urban runoff from
areas of new development and
redevelopment must be managed to
control impacts to:
 Beneficial uses of receiving waters;
 Integrity of streams and channels; and
 Natural habitats.
 City and county staff are responsible
for implementing development
regulations within their jurisdiction,
including the Water Quality
Management Plan program.
 The development community is
responsible for complying with
regulations that require urban runoff
quality and quantity management be
a part of most new projects.
2
Training Session Objectives
To learn about current requirements for
Project-Specific Water Quality Management Plans
for new development and redevelopment projects
in the Riverside County
Santa Margarita River Watershed
&
To learn about upcoming changes to these requirements.
3
Today’s Agenda
 Welcome and Training Process
 Water Quality Management Plans – Today
 Overview
 Fundamentals
 Break
 Water Quality Management Plans – Future




Priority Development Projects
Best Management Practices
Hydromodification
Schedule for Changes
4
Prerequisites for Successful
Course Completion
 A desire to learn about Water
Quality Management Plans
 A willingness to participate in
the learning process!
 A basic understanding of the
development review and
approval process at your
agency or at the agencies
where you submit plans
 A copy of the document,
“Riverside County Water
Quality Management Plan for
Urban Runoff” is helpful
 Verify the Watershed
 Verify the Date
 http://rcflood.org/NPDES/
5
Introductions
 Your Presenter – AEI-CASC Consulting
 Jeff Endicott, P.E., BCEE, CPESC
 Audience Introductions
 Agencies
 Engineering
 Planning
 Building
 Code Enforcement
 Others?
 Development Industry
 Developers and Builders
 Planners
 Architects
 Engineers
 Contractors
 Others?
6
Training Process
Restrooms
Cell phones – turn off, set to vibrate, or set to
stun
A mid-session break is planned
Questions
 We have a lot to cover
 “In-scope” questions – Please signal
 Will take them to the extent that many will benefit
 “Out-of-scope” questions will be deferred
Goal – To complete the session within 4 hours
 Sticking to the process will help accomplish this
goal!
7
Water Quality Management Plans
for the
Margarita Watershed
of
Riverside County
Water Quality Management Plan Overview
April 2011 Edition
Minor Changes April 2012
Updated June 2013
Today’s Agenda
 Welcome and Training Process
 Water Quality Management Plans – Today
 Overview
 Fundamentals
 Break
 Water Quality Management Plans – Future




Priority Development Projects
Best Management Practices
Hydromodification
Schedule for Changes
9
Riverside County
Drainage Area Management Plan (DAMP)
 Describes urban runoff
management strategies planned
by the municipal NPDES permit
holders
 Addresses the prescriptive and
stringent requirements in the
2004 Santa Margarita River
Watershed Stormwater Permit
 Requirements remain in effect
until the Regional board
approves compliance documents
submitted under the 2010
Stormwater Permit.
 Status…
 Updated April 2007
 http://rcflood.org/NPDES/
10
Riverside County
Drainage Area Management Plan (DAMP)
 Will the requirements in the permits and strategies
described in the DAMP ever change?
 Yes!
 What’s driving the changes in requirements and
strategies?
 The most recent municipal NPDES storm water permit
 Riverside County – Santa Margarita River Watershed Permit
 Order No. R9-2010-0016, NPDES No. CAS0108766
 Issued November 10, 2010
11
Riverside County Municipal NPDES Permits
Santa Margarita River Watershed Permittees
Riverside County
Flood Control and
Water Conservation
District 
County of Riverside 
Murrieta 
Temecula
Wildomar 
 Listed as a Permittee under the SAR & SMR Watershed permits.
By agreement with the Regional Boards, local program based on SMR permit.
12
Riverside County
Drainage Area Management Plan (DAMP)
 When will the WQMP program changes take
place?
 Changes will be phased in over time
 Santa Margarita River Watershed
 Template to RWQCB by June 30, 2012
 Implementation date TBD after July 30, 2012
 An overview of the program changes, or
evolution, will be discussed later today.
 In the meantime…
 Continue to implement the strategies and programs
that have been in place for many years now!
 Those strategies and programs are the focus of
today’s training.
13
Riverside County
Drainage Area Management Plan (DAMP)
Existing Urban Runoff
Management Strategies for
New Development and
Redevelopment as
Described in the DAMP
14
DAMP Section 6
Development Planning
 Covers the entire spectrum
 Land Use Planning
 General Plans
 General Plan
Amendments
 Environmental Review
 Initial Studies
 Negative Declarations
 Environmental Impact
Reports
 Development Review,
Approval, and Permitting
 Conditioning
 Permitting
 Project closeout
15
Development Project
Review, Approval And Permitting
New Development &
Significant Redevelopment
Projects
Preliminary
Water Quality Management Plan
During Entitlement*
Other Development
Projects
*Projects subject to
discretionary approval
during land use entitlement
and ministerial approval for
subsequent permits may be
required to submit a
preliminary project-specific
WQMP.
Condition of Approval
And/or
Permit Conditions
Conditions of Approval
Building or
Grading Permits
Final
Project Specific
Water Quality Management Plan
Tracking,
Inspection,
And Enforcement
Permit
Closeout
Three Project Categories
Redevelopment
New development
Other development
Development Project
Review, Approval, Permitting,
And Inspection Process
Knowing your project category
is key to understanding the
requirements for the project!
Today, we’ll look briefly
at definitions of each
category.
For detailed definitions,
consult program Guidance
Documents (DAMP/WQMP).
17
Development Project
Review, Approval, Permitting,
And Inspection Process
New Development &
Significant Redevelopment
Projects
Preliminary
Water Quality Management Plan
During Entitlement*
Other Development
Projects
*Projects subject to
discretionary approval
during land use
entitlement and
ministerial approval for
subsequent permits
may be required to
submit a preliminary
project-specific WQMP.
Condition of Approval
And/or
Permit Conditions
Conditions of Approval
Building or
Grading Permits
Final
Project Specific
Water Quality Management Plan
Tracking,
Inspection,
And Enforcement
Permit
Closeout
New Development
Residential/Housing
New Development &
Significant Redevelopment
Projects
 Construction of 10 or more dwelling units.
 Examples include:




Single family dwelling units
Multi-family dwelling units
Condominiums
Apartments
19
New Development
Industrial and Commercial
New Development &
Significant Redevelopment
Projects
 Where the land area represented by the proposed map
or permit is 100,000 square feet or more.
 Examples include:









Hospitals
Educational institutions
Recreational facilities
Mini-malls
Hotels
Office buildings
Warehouses
Light industrial facilities
Heavy industrial facilities
20
New Development
Automotive Repair Shops
New Development &
Significant Redevelopment
Projects
 Based on Standard Industrial
Classification Codes
 5013 - Motor Vehicle Supplies and New
Parts
 5014 Tires and Tubes
 5541 Gasoline Service Stations
 7532 - Top, Body, Upholstery Repair Shops
and Paint Shops
 7533 - Automotive Exhaust System Repair
Shops
 7534 - Tire Retreading and Repair Shops
 7536 Automotive Glass Replacement
Shops
 7537 - Automotive Transmission Repair
Shops
 7538 - General Automotive Repair Shops
 7539 - Automotive Repair Shops, NEC
21
New Development
Restaurants
New Development &
Significant Redevelopment
Projects
 Where the project site is 5,000 square feet or more.
 Smaller restaurants are covered too, but excepted from
treatment control and peak flow mgmt.*
 SIC 5812 - Eating and Drinking Places
22
New Development
Hillside Development
New Development &
Significant Redevelopment
Projects
 Where impervious surfaces are created…
 5,000 square feet or more and
 Located on areas with known erosive soil conditions,
 Where the natural slope is 25% or more.
23
New Development
Development Near ESAs
New Development &
Significant Redevelopment
Projects
 Where 2,500 square feet or more of impervious area is
created on a proposed site or where the project
increases the imperviousness of a proposed site to 10%
or more of its naturally occurring condition, and…
 Is within or adjacent to (within 200’) or discharges directly into
waters…
 With a Basin Plan Beneficial Use Designation of RARE
(supporting plant or animal species designated as rare,
threatened, or endangered) OR
 Listed on the CWA Section 303(d) list.
 Includes discharges to Areas of Special Biological
Significance or within the Western Riverside County MultiSpecies Habitat Conservation Plan area or equivalent
sensitive area.
24
New Development
Parking Lots
New Development &
Significant Redevelopment
Projects
 Where 5,000 square feet or more of impervious surface
will be created for temporary parking or storage of
motor vehicles and includes “sites” and “facilities.”
25
New Development
Streets, Roads, Highways, Freeways
New Development &
Significant Redevelopment
Projects
 Where 5,000 square feet or more of paved surface is
created for the transportation of automobiles, trucks,
motorcycles, and other vehicles.
26
New Development
Retail Gasoline Outlets
New Development &
Significant Redevelopment
Projects
 Retail gasoline outlets in the SMR Watershed that are…
 5,000 square feet or more in area OR
 Have a projected Average Daily Traffic (ADT) of 100 or more
vehicles per day.
27
Significant Redevelopment
New Development &
Significant Redevelopment
Projects
 Addition, Creation, or Replacement of 5,000 square feet
or more of impervious surface on an already developed
site of a listed project category.
 Examples include (but of course, are not limited to)…
 Impervious or compacted soil parking lots (SAR Watershed).
 Additional buildings and structures.
 Extension of the footprint of a building.
 Excludes…
 Routine Maintenance.
28
Significant Redevelopment
New Development &
Significant Redevelopment
Projects
The 50% Rule for Redevelopment Projects
 Where a Priority Project is a Redevelopment Project and
replaces
 < 50% of the impervious surfaces on an existing developed site,
and
 The site was not previously subject to Priority Development
Project requirements, then
 The WQMP design standards apply only to the addition or
replacement, and not to the entire developed site.
 Where a Priority Project is a Redevelopment Project and
replaces
 ≥ 50% of the impervious surfaces on an existing developed site,
then
 The WQMP design standards apply to the entire development.
29
Priority Development Project Summary
New Development and Redevelopment
 Residential - Housing
 Industrial – Commercial
 Automotive Repair Shops
 Restaurants
 Hillside Development
 Development Near ESAs
 Parking Lots
 Streets, Roads, Highways,
Freeways
 Retail Gasoline Outlets
 Significant
Redevelopment
The descriptions of
Priority Development Projects
in this presentation
include generalized summaries.
For project-specific definitions,
consult the DAMP or WQMP.
30
Development Project
Review, Approval, Permitting,
And Inspection Process
New Development &
Significant Redevelopment
Projects
Preliminary
Water Quality Management Plan
During Entitlement*
Other Development
Projects
*Projects subject to
discretionary approval
during land use
entitlement and
ministerial approval for
subsequent permits
may be required to
submit a preliminary
project-specific WQMP.
Condition of Approval
And/or
Permit Conditions
Conditions of Approval
Building or
Grading Permits
Final
Project Specific
Water Quality Management Plan
Tracking,
Inspection,
And Enforcement
Permit
Closeout
Other Development
Other Development
Projects
 Projects not meeting the definition of New Development
or Significant Redevelopment.
 This is a pretty small group of projects and is likely to be
limited to infill-type projects
32
Development Project
Review, Approval, Permitting,
And Inspection Process
New Development &
Significant Redevelopment
Projects
Preliminary
Water Quality Management Plan
During Entitlement*
Other Development
Projects
*Projects subject to
discretionary approval
during land use
entitlement and
ministerial approval for
subsequent permits
may be required to
submit a preliminary
project-specific WQMP.
Condition of Approval
And/or
Permit Conditions
Conditions of Approval
Building or
Grading Permits
Final
Project Specific
Water Quality Management Plan
Tracking,
Inspection,
And Enforcement
Permit
Closeout
First Things First!
What Is A WQMP?
Preliminary
Water Quality Management Plan
During Entitlement*
 Water
 Quality
 Management
 Plan
 The WQMP is a project-specific plan of Best
Management Practices (BMPs), including site design,
source controls, and treatment controls, to address
post-construction urban runoff quality and quantity to
protect receiving waters.
 A project-specific WQMP must be submitted and
approved prior to the first discretionary project
approval or permit for all Significant Redevelopment
and New Development projects.
34
Project Lifecycle and WQMPs
DEVELOPMENT
RAW
LAND
PROJECT
PLANNING
AND
DESIGN
PROJECT
CONSTRUCTION
PROJECT
O&M
REDEVELOPMENT
This is the domain of the
Water Quality
Management Plan
The WQMP
This is the domain of the
Storm Water
Pollution Prevention Plan
The SWPPP
35
Project Lifecycle and WQMPs
DEVELOPMENT
RAW
LAND
PROJECT
PLANNING
AND
DESIGN
PROJECT
CONSTRUCTION
PROJECT
O&M
REDEVELOPMENT
Pollution Prevention Is Now Part Of Every Project Stage!
This is the domain of the
Water Quality
Management Plan
The WQMP
This is the domain of the
Storm Water
Pollution Prevention Plan
The SWPPP
36
Preliminary
Project-Specific WQMP
Preliminary
Water Quality Management Plan
During Entitlement*
 A Preliminary Project-Specific WQMP may be required
 When a project is subject to discretionary approval during the
planning and entitlement process (tentative tract map, parcel
map, or subdivision map) and
 Will be subject to ministerial approvals for subsequent grading
or building permits
 Submit WQMP with project application
37
Preliminary
Project-Specific WQMP
Preliminary
Water Quality Management Plan
During Entitlement*
 Level of detail in a Preliminary Project-Specific WQMP
will depend on the overall project design at the time
project approval is sought.
 Key point – The Preliminary WQMP needs to be specific
enough to identify the land required for BMP implementation!
Many cities have adopted
City-specific requirements to guide the
Preliminary WQMP process
 A Final Project-Specific WQMP that is in substantial
conformance with the Preliminary Project-Specific
WQMP (and in full conformance with the WQMP
Guidance) will be required prior to issuance of any
building or grading permit.
38
Development Project
Review, Approval, Permitting,
And Inspection Process
New Development &
Significant Redevelopment
Projects
Preliminary
Water Quality Management Plan
During Entitlement*
Other Development
Projects
*Projects subject to
discretionary approval
during land use
entitlement and
ministerial approval for
subsequent permits
may be required to
submit a preliminary
project-specific WQMP.
Condition of Approval
And/or
Permit Conditions
Conditions of Approval
Building or
Grading Permits
Final
Project Specific
Water Quality Management Plan
Tracking,
Inspection,
And Enforcement
Permit
Closeout
Standard Conditions
Help Implement WQMPs
Conditions of Approval
Condition of Approval
And/or
Permit Conditions
 Assist in compliance with the statewide Construction General
Permit and the Industrial General Permit.
 Assist in compliance with adopted Total Maximum Daily Load
(TMDL) allocations.
 Requires that structural BMPS are installed in conformance with
approved plans.
 Requires that applicants are prepared to implement all nonstructural BMPS included in Conditions of Approval
 Santa Margarita River Watershed - limits grading during the wet
season without additional BMPs in compliance with Third-Term
SMR MS4 Permit.
40
Development Project
Review, Approval, Permitting,
And Inspection Process
New Development &
Significant Redevelopment
Projects
Preliminary
Water Quality Management Plan
During Entitlement*
Other Development
Projects
*Projects subject to
discretionary approval
during land use
entitlement and
ministerial approval for
subsequent permits
may be required to
submit a preliminary
project-specific WQMP.
Condition of Approval
And/or
Permit Conditions
Conditions of Approval
Building or
Grading Permits
Final
Project Specific
Water Quality Management Plan
Tracking,
Inspection,
And Enforcement
Permit
Closeout
Conditions for “Other”
Projects (No WQMP)
Condition of Approval
And/or
Permit Conditions
 In addition to the “Conditions of Approval” reviewed a
moment ago…
 Other Projects shall incorporate Site Design BMPs and
Source Control BMPs into project plans as applicable
and feasible.
 Other Projects may, on a case-by-case basis, be
required to incorporate Treatment Control BMPs.
 Key point: recommended for projects discharging to 303(d)
listed water bodies!
 Key point: highly recommended for projects discharging to
waters with an adopted TMDL.
 Requirements for “Other Projects” will be included in…
 Conditions of Approval or
 Grading or Building Permit Conditions.
42
Development Project
Review, Approval, Permitting,
And Inspection Process
New Development &
Significant Redevelopment
Projects
Preliminary
Water Quality Management Plan
During Entitlement*
Other Development
Projects
*Projects subject to
discretionary approval
during land use
entitlement and
ministerial approval for
subsequent permits
may be required to
submit a preliminary
project-specific WQMP.
Condition of Approval
And/or
Permit Conditions
Conditions of Approval
Building or
Grading Permits
Final
Project Specific
Water Quality Management Plan
Tracking,
Inspection,
And Enforcement
Permit
Closeout
Final
Project-Specific WQMP
Final
Project Specific
Water Quality Management Plan
 Water
 Quality
 Management
 Plan
 The Final Project-Specific WQMP…
 Is a planning level document…
 Is not expected to contain final BMP design drawings and
details…
 Is expected to identify and show the location of structural
BMPs…
 Is expected to provide design parameters and final design
concepts of treatment BMPs…
 Must be approved prior to issuance of building or grading
permits.
44
Final
Project-Specific WQMP
Final
Project Specific
Water Quality Management Plan
 The Final Project-Specific WQMP will contain…






Site Design BMPs.
Source Control BMPs.
Treatment Control BMPs.
BMP maintenance descriptions.
BMP funding description.
BMP operation responsibilities.
 Must conform to the Guidance!
Many cities supplement the
Guidance with City-specific
requirements.
45
Development Project
Review, Approval, Permitting,
And Inspection Process
New Development &
Significant Redevelopment
Projects
Preliminary
Water Quality Management Plan
During Entitlement*
Other Development
Projects
*Projects subject to
discretionary approval
during land use
entitlement and
ministerial approval for
subsequent permits
may be required to
submit a preliminary
project-specific WQMP.
Condition of Approval
And/or
Permit Conditions
Conditions of Approval
Building or
Grading Permits
Final
Project Specific
Water Quality Management Plan
Tracking,
Inspection,
And Enforcement
Permit
Closeout
Mandatory Notes for
Construction Plans
Building or
Grading Permits
 DAMP Requirements Prior to Grading/Building Permits
 Requires a number of standard notes on construction plans as
part of the grading and building permit process.
 These notes are detailed in the DAMP and won’t be covered
here.
47
Grading and Building Permits
Are Issued After…
Building or
Grading Permits
 For Redevelopment and New Development Projects…
 Final Project-Specific WQMP is approved.
 Plan Check verifies that…
 BMPs from WQMP are incorporated into plans.
 Standard Notes have been placed on plans.
 Conditions of Approval have been met.
 For Other Projects…
 Construction plans incorporate site design and source control
BMPs.
 Standard Notes have been placed on plans.
 Condition of Approval have been met.
48
Development Project
Review, Approval, Permitting,
And Inspection Process
New Development &
Significant Redevelopment
Projects
Preliminary
Water Quality Management Plan
During Entitlement*
Other Development
Projects
*Projects subject to
discretionary approval
during land use
entitlement and
ministerial approval for
subsequent permits
may be required to
submit a preliminary
project-specific WQMP.
Condition of Approval
And/or
Permit Conditions
Conditions of Approval
Building or
Grading Permits
Final
Project Specific
Water Quality Management Plan
Tracking,
Inspection,
And Enforcement
Permit
Closeout
Tracking, Inspection, and
Enforcement
Tracking,
Inspection,
And Enforcement
 These subjects will be covered in other training
sessions.
50
Development Project
Review, Approval, Permitting,
And Inspection Process
New Development &
Significant Redevelopment
Projects
Preliminary
Water Quality Management Plan
During Entitlement*
Other Development
Projects
*Projects subject to
discretionary approval
during land use
entitlement and
ministerial approval for
subsequent permits
may be required to
submit a preliminary
project-specific WQMP.
Condition of Approval
And/or
Permit Conditions
Conditions of Approval
Building or
Grading Permits
Final
Project Specific
Water Quality Management Plan
Tracking,
Inspection,
And Enforcement
Permit
Closeout
Permit Closeout, Certificates of
Use and Occupancy
Permit
Closeout
 Applicants will be required to demonstrate that:
 All structural BMPs have been constructed and installed in
conformance with approved plans and specifications.
 A mechanism or agreement acceptable to the Co-Permittee has
been executed for the long-term funding and implementation,
operation, maintenance, repair, and/or replacement of BMPs.
 The applicant is prepared to implement all non-structural
BMPs.
 An adequate number of copies of the project-specific WQMP, if
applicable, are available onsite.
 Facilities subject to the Industrial General Permit (IGP) have
provided proof of coverage under the IGP by providing a copy
of the Notice of Intent (NOI) submitted to the State Board and/or
a copy of the notification of the issuance of a Waste Discharge
Identification (WDID) Number.
52
Summary of Requirements
 Post-construction water pollution control, a requirement
for many years, is now being more rigorously enforced!
 A WQMP is required for all but the smallest of projects.
 Final Project-Specific WQMP is required before issuance of
grading/building permits.
 Preliminary Project-Specific WQMP may be required during
project entitlement phase.
 Changes to the post-construction water pollution
control program are forthcoming…
 Until the changes are in place, the program that has been in
place for the last few years must continue to be implemented.
53
Water Quality Management Plans
for the
Santa Margarita Watershed
of
Riverside County
Water Quality Management Plan Fundamentals
April 2011 Edition
Minor Changes April 2012
Updated June 2013
Today’s Agenda
 Welcome and Training Process
 Water Quality Management Plans – Today
 Overview
 Fundamentals
 Break
 Water Quality Management Plans – Future




Priority Development Projects
Best Management Practices
Hydromodification
Schedule for Changes
55
Determining
Project Category
 A correct Project Category determination is essential!
 The Project Category is a key factor in…
 Deciding whether a WQMP is required!
 Identifying the pollutants likely to be associated with the
project.
 The correct Project Category is easy to determine for
most projects.
 Projects that fall into the “gray areas” of the category
definitions will require careful consideration!
 An incorrect determination of Project Category could
create significant future headaches such as…
 Permit enforcement actions against the agency or owner.
 Requirements to retrofit a complete or near-complete project.
56
Determining
Project Category
 Use the Checklist
included in DAMP.
 Figure 6-2b – SMR
Watershed.
 Provides a place to
document category
determination!
 WQMP Guidance
Document Section 3
provides a narrative
description of each
project category.
57
Let’s Walk Thru
The Checklist
 Sample Checklist DAMP Figure 6-2b.
 The top area is for
basic project
information.
58
Let’s Walk Thru
The Checklist
 Sample Checklist - DAMP
Figure 6-2b.
 The middle area
describes Priority
Project Categories.
 Check “Yes” or “No” for
the subject project.
59
Let’s Walk Thru
The Checklist
 Sample Checklist - DAMP
Figure 6-2b
 The bottom area tells
you whether a WQMP is
required.
60
Determining
Project Category - Summary
 The Checklist is easy to
use!
 If a project has attributes of
one or more of the Priority
Development Project
Categories, then a WQMP
is required.
 WQMP applies to the entire
project for new development.
 See the “50% Rule” to
determine where the WQMP
applies for significant
redevelopment.
61
Determining
Project Pollutants
 Expected Project Pollutants depend on the Project
Category!
 WQMP Exhibit B identifies expected pollutants for each
project category.
62
Determining
Project Pollutants
 P=A Potential Pollutant
 N=Not a Potential Pollutant
 Exhibit B is easy to use!
63
Determining
Project Pollutants – Example
64
Determining
Project Pollutants - Example
 Project Pollutants









Sediment/Turbidity - A potential pollutant (Note 1)
Nutrients – A potential pollutant (Note 1)
Organic Compounds – A potential pollutant (Note 5)
Trash and Debris – A potential pollutant
Oxygen Demanding Substances – A potential pollutant (Note 1)
Bacteria and Viruses – A potential pollutant (Note 3)
Oil and Grease – A potential pollutant
Pesticides – A potential pollutant (Note 1)
Metals – A potential pollutant
 Note 1 – A potential pollutant if landscaping or open area exists on the
project site
 Note 3 – A potential pollutant if land use involves animal waste
 Note 5 – Specifically solvents
65
Determining
Project Pollutants
 Project Pollutants
 Stick with Exhibit B unless you have a very good reason to
deviate!
 If you deviate, document your reasons in the project file…you
may be called on later to explain the change.
 Pay particular attention to the “Notes” at the bottom of the
table.
66
Identifying the
Project Watershed and Sub-Watershed
 Identify the project watershed…
 Santa Margarita River Watershed
 On-line tool available at http://rcflood.org/NPDES/
67
Identifying the
Project Watershed and Sub-Watershed
 Identify the sub-watershed…
 The Basin Plan has a nice list
of sub-watersheds
Remember to consider adopted
Basin Plan Amendments!
68
Identifying the
Project Watershed
 Correct identification of the watershed and subwatershed is critical to identification of Receiving
Waters, Impairments, and Pollutants of Concern.
 Example Situation (From 2010 CWA Section 303(d) List and TMDLs)
 Murrieta Creek – Impaired due to Chlorpyrifos, Copper, Iron,
Manganese, Nitrogen, Phosphorus, and Toxicity.
 Santa Margarita River (Upper) – Impaired due to Phosphorus
and Toxicity.
 Santa Margarita River (Lower) – Impaired due to Enterococcus,
Fecal Coliform, Phosphorus, and Total Nitrogen.
 Example Ramifications
 All three waters are in the Santa Margarita River watershed.
 Discharges to all three waters require extra attention to
Phosphorus due to the impairments.
 Discharges to Murrieta Creek require extra attention to
Chlorpyrifos and Metals due to impairments.
69
Identifying
Project Receiving Waters
 Project watershed and sub-watershed provide for
receiving water identification.
 Maps from Flood Control, USGS, and others are useful
in finding the receiving waters.
70
Identifying
Project Receiving Waters
 Proximate Receiving Waters – Generally receiving
waters closest to your project.
 A precise definition has not been established.
 When TMDLs come into play, they are likely to push the
“Proximate Threshold” further downstream.
 Downstream Receiving Waters – Include all receiving
waters that could receive drainage from the project site.
71
Identifying
Receiving Water Impairments
 Impairments of receiving waters can be obtained from
several sources…
 Impairment maps
 http://rcflood.org/NPDES/ (Verified
April 2011)
 California Clean Water Act Section 303(d) list of impaired
water quality segments and TMDL
 http://waterboards.ca.gov/water_issues/programs/tmdl/303
d_lists2006_epa.shtml (Verified April 2011)
72
Identifying
Receiving Water Impairments
Santa Margarita River Watershed Map
Verified June 2013
http://rcflood.org/downloads/NPDES/Documents/Developers/Policies/SMR_Watershed_Impairments.pdf
73
Identifying
Receiving Water Impairments
 303(d) list water quality limited (impaired) segments:
 http://www.waterboards.ca.gov/water_issues/programs/tmdl/int
egrated2010.shtml (Verified June 2013)
Download the list or use the
on-line tool. Make sure you
are viewing the combined list
(Categories 4a, 4b, and 5).
74
TMDL Status
Pollutant Stressors
Receiving Water Names
Identifying
Receiving Water Impairments
75
Identifying
Receiving Water Impairments
 Adopted Total Maximum Daily Loads (TMDLs) are
important to consider.
 http://www.waterboards.ca.gov/sandiego/water_issues/progra
ms/tmdls/index.shtml
 TMDLs include requirements that address specific
pollutant stressors in receiving waters.
76
Identifying
Receiving Water Impairments
 Example TMDL for Penasquitos Lagoon:
 http://www.waterboards.ca.gov/sandiego/board_decisions/adop
ted_orders/2012/R9-2012-0033_signed.pdf
77
Identifying
Receiving Water Impairments
 An adopted TMDL changes the Basin Plan.
 For sediment in Penasquitos Lagoon, the Basin Plan’s
narrative objective…
78
Identifying
Receiving Water Impairments
 Changes to a numeric sediment objective in the form of
 Wasteload Allocations for point sources, and
 Load Allocations for non-point sources.
79
Identifying
Receiving Water Impairments
 The TMDL identifies responsible parties.
80
Identifying
Receiving Water Impairments
 The TMDL identifies things the responsible parties must
do to comply with the TMDL.
81
Identifying
Pollutants of Concern
 Pollutants of Concern (POC) are those Project
Pollutants that have been identified as Pollutant
Stressors in Project Receiving Waters
Project
Pollutants
POC
 303(d) list pollutant stressors
 Constituents addressed in TMDLs
Receiving
Water
Pollutant
Stressors
82
Identifying
Pollutants of Concern
Addressing Pollutants
Associated with Development
Project
Pollutants
POC
Address these pollutants using BMPs
Receiving
Water
Pollutant
Stressors
Address these pollutants using BMPS with a
High or Medium effectiveness
83
Post Construction
Best Management Practices
Site
Design
BMPs
Urban
Runoff
Controls
Source
Control
BMPs
Treatment
Control
BMPs
84
Post Construction Controls
Site Design BMPs
Site
Design
BMPs
Urban
Runoff
Controls
Source
Control
BMPs
Treatment
Control
BMPs
85
Post Construction Controls
Site Design BMPs
 Reduce runoff.
 Increase Infiltration.
 Reduce the pollutant transport mechanism.
 Minimize difference between pre and post development
runoff .
 Reduce the size of structural controls (filtering devices).
86
Post Construction Controls
Site Design BMPs
87
Post Construction Controls
Site Design BMPs
 Strategy
 “Do what you can where you can.” (Geoff Brosseau, BASMAA)
 Integrate BMPs throughout the site.
 Every surface presents an opportunity!
 Landscaping.
 Hardscaping.
 Use drainage as an organizing element.
88
Post Construction Controls
Source Control BMPs
Site
Design
BMPs
Urban
Runoff
Controls
Source
Control
BMPs
Treatment
Control
BMPs
89
Post Construction Controls
Source Control BMPs
Site
Design
BMPsSite
Design
BMPs
Urban
Source
Control
Source
BMPs
Control
BMPs
Runoff
Urban
Controls
Runoff
Controls
Treatment
Control
Treatment
BMPs
Control
BMPs
 Reduce potential for rainfall, runoff, and pollutants to
contact each other.
90
Post Construction Controls
Source Control BMPs
Site
Design
BMPsSite
Design
BMPs
Urban
Source
Control
Source
BMPs
Control
BMPs
Runoff
Urban
Controls
Runoff
Controls
Treatment
Control
Treatment
BMPs
Control
BMPs
91
Post Construction Controls
Source Control BMPs
Site
Design
BMPsSite
Design
BMPs
Urban
Source
Control
Source
BMPs
Control
Runoff
Urban
Controls
Runoff
BMPs
Controls
Treatment
Control
Treatment
BMPs
Control
BMPs
 Strategy
 Protect pollutant sources from contact with…
 Rainfall.
 Runoff.
 Integrate pollution prevention behaviors into daily routines…
 Educate kids, tenants, owners, employees.
 Mandate thorough activity restrictions and prohibitions.
92
Post Construction Controls
Treatment Control BMPs
Site
Design
BMPs
Urban
Runoff
Controls
Source
Control
BMPs
Treatment
Control
BMPs
93
Post Construction Controls
Treatment Control BMPs
 Engineered systems designed and constructed to treat
the adverse impacts of urban runoff.
 BMPs that remove pollutants by…
 Filtration.
 Media absorption.
 Other physical, biological, or chemical processes.
94
Post Construction Controls
Treatment Control BMPs
Figure 24 - Example Filtration Treatment Control BMP
95
Post Construction Controls
Treatment Control BMPs
 Select treatment controls based on Project Pollutants.
 When Project Pollutants include Pollutant Stressors in
impaired Receiving Waters, Treatment Control BMPs of
Medium or High effectiveness must be used.
 Use WQMP Guidance Document Table 3 to identify
Treatment Control BMPs.
96
Post Construction Controls
Treatment Control BMPs
 H=High
 M=Medium
 L=Low
 U=Unknown
97
Post Construction Controls
Treatment Control BMPs
 Example 1 – Find a Medium or Highly effective
Treatment Control BMP for Nutrients
Detention, Infiltration, Wet Ponds or Wetlands, and Filtration System
BMPs will meet the treatment goals.
98
Post Construction Controls
Treatment Control BMPs
 Example 2 – Find a Medium or Highly effective
Treatment Control BMP for Nutrients and Pathogens
Infiltration BMPs will meet the treatment goals.
Filtration BMP will meet the treatment goals.
99
Post Construction Controls
Treatment Control BMPs
 Example 3 – Find a Medium or Highly effective TC BMP
for Pathogens and that also treats for Oils and Grease.
Filtration BMP will meet the treatment goals.
Biofilter BMP + Infiltration BMP will meet the treatment goals.
100
Post Construction Controls
Treatment Control BMPs
 Strategy
 Stick with the BMPs recommended in Table 3 for various
pollutants.
 If you deviate, document your reasons in the project file…you
may be called on later to explain the change.
 Pay particular attention to the “Notes” at the bottom of the
table.
 BMP Treatment Trains (two or more BMPs in series) can
provide for a wide range of pollutant removal.
 Latest Information on BMPs
 Caltrans Treatment BMP Technology Report – April 2008.
 An excellent source of well-researched information on BMP
performance.
 See Report CTSW-RT-08-167.02.02
101
Summary of BMP
Deployment Strategy
2
3
Today’s Agenda
 Welcome and Training Process
 Water Quality Management Plans – Today
 Overview
 Fundamentals
 Break
 Water Quality Management Plans – Future




Priority Development Projects
Best Management Practices
Hydromodification
Schedule for Changes
103
Water Quality Management Plans
for the
Santa Margarita Watershed
of
Riverside County
Water Quality Management Plans - Future
April 2011 Edition
Minor Changes April 2012
Updated June 2013
Today’s Agenda
 Welcome and Training Process
 Water Quality Management Plans – Today
 Overview
 Fundamentals
 Break
 Water Quality Management Plans – Future




Priority Development Projects
Best Management Practices
Hydromodification
Schedule for Changes
105
Riverside County- SMR Watershed
Water Quality Management Plans (WQMPs)
 Changes in the WQMP program and requirements are
coming in the foreseeable future!
 What’s driving theses changes?
 The most recent municipal NPDES storm water permits.
 Riverside County – Santa Margarita River Watershed Permit
 Order No. R9-2010-0016, NPDES No. CAS0108766
 Issued November 10, 2010
 Does this training session cover the details?
 No.
 The details are still being worked out.
 This training session gives a look ahead at what to expect.
106
Water Quality Management Plans
for the
Santa Margarita Watershed
of
Riverside County
Water Quality Management Plans – Future
Priority Development Projects
April 2011 Edition
Minor Changes April 2012
Updated June 2013
Today’s Agenda
 Welcome and Training Process
 Water Quality Management Plans – Today
 Overview
 Fundamentals
 Break
 Water Quality Management Plans – Future




Priority Development Projects
Best Management Practices
Hydromodification
Schedule for Changes
108
Priority Development Project Transition
New Development and Redevelopment
 Current PDPs
 Residential - Housing
 Future PDPs
 Industrial – Commercial
 New Development (New,
combines categories)
 Automotive Repair Shops
 Automotive Repair Shops
 Restaurants
 Restaurants
 Hillside Development
 Hillside Development
 Development Near ESAs
 Development Near ESAs
 Parking Lots
 Parking Lots
 Streets, Roads, Highways,
Freeways
 Streets, Roads, Highways,
Freeways
 Retail Gasoline Outlets
 Retail Gasoline Outlets
 Significant Redevelopment
 Significant Redevelopment
 Projects ≥ 1 ac (New)
109
Priority Development Project
the old Residential, Housing,
New Development Combines
Commercial, and Industrial PDPs
 Where 10,000 square feet or more of impervious
surfaces is created collectively over the entire site.
 Development projects within the planning and building
authority of the Co-Permittees.
 Examples include:
 Commercial
 Industrial
 Residential
 Single Family
 Multi-Family
 Mixed Use
 Public or Private
110
Priority Development Project
Automotive Repair Shops
 Where one of more of the following SIC codes applies:
 5013 - Motor Vehicle Supplies and New Parts
 5014 Tires and Tubes
 5541 Gasoline Service Stations
 7532 - Top, Body, Upholstery Repair Shops and Paint Shops
 7533 - Automotive Exhaust System Repair Shops
 7534 - Tire Retreading and Repair Shops




7536 Automotive Glass Replacement Shops
7537 - Automotive Transmission Repair Shops
7538 - General Automotive Repair Shops
7539 - Automotive Repair Shops, NEC
111
Priority Development Project
Restaurants
 Where the area of land development is 5,000 square feet
or more.
 Smaller restaurants are also included, but excepted from
structural treatment control BMP and numeric sizing
requirement and hydromodification.
 SIC 5812 - Eating and Drinking Places
112
Priority Development Project
Hillside Development
 Where development creates 5,000 square feet or more
of impervious surface located…
 On areas with known erosive soil conditions,
 Where grading will occur where the natural slope is 25% or
more.
113
Priority Development Project
Development Near ESAs
 Where 2,500 square feet or more of impervious area is
created or increases the imperviousness of a proposed
site to 10% or more of its naturally occurring condition,
and…
 Is within or adjacent to (within 200’) or discharges directly into
waters…
 With a Basin Plan Beneficial Use Designation of…
 RARE.
 Within an area in the…
 Riverside County Multi-Species Habitat Conservation Plan.
 Natural Communities Conservation Program.
 Area of Special Biological Significance (ASBS).
 Listed on the CWA Section 303(d) list.
 Or equivalent environmentally sensitive area.
114
Priority Development Project
Parking Lots
 Where a parking lot of 5,000 square feet or more is
created and potentially exposed to runoff.
 “Parking Lot” is defined as a land area or facility for the
temporary parking or storage of motor vehicles.
 Added specific reference to “Impervious Parking Lots.”
115
Priority Development Project
Streets, Roads, Highways, Freeways
 Where 5,000 square feet or more of paved surface is
created for the transportation of automobiles, trucks,
motorcycles, and other vehicles.
 Exempts public works projects from developing a projectspecific WQMP if Co-Permittees develop revised road design
and post-construction BMP guidance.
 Unpaved roads not covered here. Co-Permittees must develop
post-construction erosion and sediment control BMPs for
unpaved roads.
116
Priority Development Project
Retail Gasoline Outlets
 Retail gasoline outlets that are…
 5,000 square feet or more in area OR
 Have a projected Average Daily Traffic
(ADT) of 100 or more vehicles per day.
117
Priority Development Project
Significant Redevelopment
 On an already developed site where 5,000 square feet or
more of impervious surface is…
 Created, added, or replaced and the existing site falls into one
of the Priority Development Project categories (SMR).
 Examples include…
 Additional buildings and structures.
 Extension of a building footprint.
 Excludes…
 Routine Maintenance.
118
Priority Development Project
Projects ≥ 1 Acre
 All other post-construction pollutant-generating new
development projects that result in a disturbance of one
acre more of land.
 This is a new Priority Development Project category in the
Santa Margarita River Watershed.
119
Summary of Future
Priority Development Project Categories
 New Development (New)
 Automotive Repair Shops
 Restaurants
 Hillside Development
 Development Near ESAs
 Parking Lots
The descriptions of future
Priority Development Project
categories in this presentation
include generalized summaries.
For project-specific definitions,
consult program guidance documents
when they become available.
Until then, refer to the respective
Municipal NPDES Permit.
 Streets, Roads, Highways, Freeways
 Retail Gasoline Outlets
 Significant Redevelopment
 Projects ≥ 1 ac (New)
120
Water Quality Management Plans
for the
Santa Margarita Watershed
of
Riverside County
Water Quality Management Plans – Future
Best Management Practices
April 2011 Edition
Minor Changes April 2012
Updated June 2013
Today’s Agenda
 Welcome and Training Process
 Water Quality Management Plans – Today
 Overview
 Fundamentals
 Break
 Water Quality Management Plans – Future




Priority Development Projects
Best Management Practices
Hydromodification
Schedule for Changes
122
A More Specific Approach to
Best Management Practices
Tier 1
• On-Site Retention (LID). Examples:
• Capture and Infiltrate, Evaporate, or Transpire
• Capture and Utilize (Harvest)
Tier 2
• Biotreatment (LID). Examples:
• Biofiltration
• Vegetated Swales and Buffer Strips
Tier 3
• Conventional Treatment Controls. Examples:
• Extended Detention Basins
• Proprietary Treatment Systems (“BMPs in a Box”)
LID = Low Impact Development
123
A More Specific Approach to
Best Management Practices
Tier 1
• Required for All Priority Development Projects.
• Except where infeasible.
• Specific feasibility criteria are being developed.
Tier 2
• Required for Volumes not Addressed by Tier 1.
• Except where infeasible.
• Specific feasibility criteria are being developed.
Tier 3
• Required for Volumes not Addressed by Tier 1 or 2.
• Must also Participate in a LID Waiver Program (SMR)
• If Infeasible, Participate in an In-Lieu Program (SAR)
Feasibility criteria and other details are under development.
124
• On-Site Retention (LID)
• Pervious Pavement (Pavers)
Tier 1
125
• On-Site Retention (LID)
• Infiltration Trench
Tier 1
126
• On-Site Retention (LID)
• Infiltration Basin
Tier 1
127
• On-Site Retention (LID)
• Rainwater Capture and Reuse
Tier 1
RainSpace™
Rainwater Storage Chamber
diagram used with permission
of Brad Peery,
RainTech
Rainwater Control Systems,
www.RainTechnologies.com.
128
• Biotreatment (LID)
• Biofiltration (With Underdrains)
Tier 2
129
• Biotreatment (LID)
• Vegetated Swale
Tier 2
130
• Conventional Treatment Controls
• Austin-Type Sand Filter
Tier 3
131
• Conventional Treatment Controls
• Extended Detention Basin
Tier 3
132
• Conventional Treatment Controls
• Insert Devices
Tier 3
133
A More Specific Approach to
Best Management Practices
 Source Control BMPs continue to be required, as
applicable, in conjunction with Tier 1, Tier 2, and Tier 3
BMPs.
134
A More Specific Approach to
Best Management Practices
 New BMP-related requirements and programs.
 BMP Program Implementation.
 Similar requirements for submittal of WQMPs.
 Added emphasis on recording easements and covenants to
help with the WQMP handoff to subsequent owners.
 BMP Construction Verification.
 Added requirements for Co-Permittees to verify that BMPs
are designed, constructed and functional per the WQMP.
 BMP Operation and Maintenance.
 Added tracking location and type of installed BMPs.
 Added requirements for BMP maintenance be verified via
inspections as frequent as annually.
 Enforcement at Development Sites.
 Specific requirement to enforce storm water ordinances at
development sites.
135
Water Quality Management Plans
for the
Santa Margarita Watershed
of
Riverside County
Water Quality Management Plans – Future
Hydromodification
April 2011 Edition
Minor Changes April 2012
Updated June 2013
Today’s Agenda
 Welcome and Training Process
 Water Quality Management Plans – Today
 Overview
 Fundamentals
 Break
 Water Quality Management Plans – Future




Priority Development Projects
Best Management Practices
Hydromodification
Schedule for Changes
137
Hydromodification
 Distinct definitions for each watershed…
 Hydromodification-SMR: The change in the natural watershed
hydrologic processes and runoff characteristics (i.e.,
interception, infiltration, overland flow, interflow and
groundwater flow) caused by urbanization or other land use
changes that result in increased stream flows and sediment
transport. In addition, alteration of stream and river channels,
such as stream channelization, concrete lining, installation of
dams and water impoundments, and excessive streambank and
shoreline erosion are also considered hydromodification, due
to their disruption of natural watershed hydrologic processes.
 Summary: Hydromodification is triggered by changes in
hydrologic processes associated with traditional development.
138
Hydromodification
 Hydromodification Management
 Goal – Geomorphic stability in channels.
 Santa Margarita River Watershed
 Presumption – Priority Development Projects will need to
address hydromodification.
 Procedures to be developed.
 Requires detailed analysis.
 “Off ramps” may ease compliance burden for some projects.
139
Hydromodification
Undermined Footings
Lead to Settlement
and Bridge Failure.
140
Water Quality Management Plans
for the
Santa Margarita Watershed
of
Riverside County
Water Quality Management Plans – Future
Schedule of Changes
April 2011 Edition
Minor Changes April 2012
Updated June 2013
Today’s Agenda
 Welcome and Training Process
 Water Quality Management Plans – Today
 Overview
 Fundamentals
 Break
 Water Quality Management Plans – Future




Priority Development Projects
Best Management Practices
Hydromodification
Schedule for Changes
142
Schedule for Changes to the
Development and Redevelopment Program
 When will the changes take place?
 Changes will be phased in over time
 Santa Margarita River Watershed
 Template to RWQCB by June 30, 2012
 Implementation date TBD after July 30, 2012
 In the meantime…
 Continue to implement the strategies and
programs that have been in place for many years
now!
143
Questions?
144
Water Quality Management Plans
for the
Santa Ana and Santa Margarita Watersheds
of
Riverside County
Presented by
Jeffrey D. Endicott, P.E., BCEE, CPESC, QSD
AEI-CASC Consulting
1470 E. Cooley Drive, Colton, CA 92324
Ph: 909.783.0101 Cell: 909.835.7537
jendicott@aei-casc.com
April 2011 Edition
Minor Changes April 2012
Updated June 2013