HomeMy WebLinkAboutC.C. 16 NPDES RPT 01-06-92AG L
CONSENT CALENDAR NO. 16
1-6-92
a
DATE: DECEMBER 19, 1991 � � � � � �-' o I I-]
To: WILLIAM A. HUSTON, CITY MANAGER
FROM:PUBLIC WORKS DEPARTMENT/ENGINEERING DIVISION
STATUS REPORT ON NATIONAL POLLUTANT DISCHARGE ELIMINATION
SUBJECT: SYSTEM (NPDES) DRAINAGE AREA MANAGEMENT PLAN ( DAMP )
RECOMMENDATION
Receive and file.
BACKGROUND
The National Pollutant Discharge Elimination System (NPDES)
stormwater pollution control effort is the result of twenty years
of legislative work beginning with the 1972 Water Pollution Control
Act, subsequently known as the Clean Water Act. The Clean Water
Act required the Environmental Protection Agency (EPA) to issue
regulations to be effective by 1983, that includes stormwater
runoff from rainfall. The resulting program was the NPDES.
Subsequently, as a result of concerns that urban stormwater runoff
can carry pollutants from diverse sources, Congress. passed the
Water Quality Act of 1987, requiring the EPA to bring stormwater
discharges into the NPDES program. On April 17, 1990, the City
Council authorized the City to be a co -permittee on the Orange
County application for a National Pollutant Discharge Elimination
System (NPDES) permit. The Council further authorized the Director
of Public Works/City Engineer to execute the agreement on the
City's behalf. The permit was subsequently approved.
In order to satisfy the requirements of the NPDES permit, the
attached Drainage Area Management Plan (DAMP) was drafted by the
NPDES Technical Advisory Committee ((TAC). The document details
the DAMP to be implemented by the cities (co -permittees) , County of
Orange, and the Orange County Flood Control District.
DISCUSSION
The DAMP is the first step of a comprehensive planning process.
There are several identified responsibilities which fall upon the
City to address. Some of the activities identified are procedures
already practiced by the City of Tustin, such as street sweeping,
managing solid waste, the initiation of a residential recycling
program, maintaining storm drains and catch basins, and controlling
spills. Other programs include catch basin stenciling, fertilizer
management, and pesticide and herbicide management. Each of these
programs will involve cost, however, the most costly of the
required programs will be the inspection of all 39" or larger storm
drains in the City. It is difficult at this time to estimate the
total potential costs of the DAMP program, as the parameters of
responsibility have just been recently defined. All of the
requirements have a completion deadline of either 1993 or 1995,
depending upon the specific requirement. Through the DAMP, the
City of Tustin, as a co -permittee, will assist in improving
existing stormwater quality management practices and identify
problems and implement new measures. Private and public sector
representatives participated in developing the stormwater pollutant
control programs contained in the DAMP. Throughout the DAMP's
evolution public review and input will be solicited. overall
program guidance will be provided by the NPDES Technical Advisory
Committee (TAC).
Rdbert S. Leddndecker
Director of Public orks/
City Engineer
KP:RSL:ktb:NPDES
Attachment
Kat'Dp Pitcher
Administrative Assistant II
NPDES STORM WATER PERMIT pROGRAM
Submitted to the San Diego and Santa Ana Regional Water Quality
Control Boards in Compliance with NPDES Storm Water and Urban
Runoff Permits *CA 0108740 and CA 8000180
December 1991
M r*C 1"I
Drainage Area
Management Plan
Table of Contents
EXECUTIVE SUMMARY
SECTION 1.0 INTRODUCTION
1.1 OBJECTIVES OF THE DRAINAGE AREA MANAGEMENT PLAN
1.2 "MAXIMUM EXTENT PRACTICABLE"
1.3 DESCRIPTION OF DRAINAGE AREA AND CLIMATE
1.4 IMPLEMENTATION OF THE DRAINAGE AREA MANAGEMENT PLAN
SECTION 2.0 PROGRAM MANAGEMENT
2.1 INTRODUCTION
2.2 MAJOR MANAGEMENT ACTIVITIES
SECTION 3.0 PLAN DEVELOPMENT
3.1 REGULATORY REQUIREMENTS
3.2 PLAN DEVELOPMENT
3.3 FINANCING
SECTION 4.0 EXISTING LEGAL AUTHORITY
4.1 INTRODUCTION
4.2 REGULATORY REQUIREMENTS
4.3 AUTHORITY TO CONTROL POLLUTANT DISCHARGE
4.4 SUMMARY
4.5 RECOMMENDATIONS
4.6 IMPLEMENTATION SCHEDULE
SECTION 5.0 PUBLIC AGENCY ACTIVITIES
5.1 INTRODUCTION
5.2 EXISTING MUNICIPAL GOVERNMENT ACTIVITIES
SECTION 6.0 PUBLIC EDUCATION
6.1 INTRODUCTION
6.2 REGULATORY REQUIREMENTS
6.3 PUBLIC INFORMATION AND EDUCATION
SECTION 7.0 NEV DEVELOPMENT
7.1 REGULATORY REQUIREMENTS
7.2 PROGRAM DEVELOPMENT
7.3 PROGRAM PLANNING
7.4 PROGRAM FINANCING
7.5 PROGRAM IMPLEMENTATION
09 -Dec -1991 -i-
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Drainage Area
Management Plan
Table of Contents
SECTION 8.0 CONSTRUCTION
8.1 INTRODUCTION
8.2 REGULATORY REQUIREMENTS
8.3 EXISTING CONSTRUCTION PRACTICES
8.4 EXISTING SEDIMENT CONTROL PROGRAMS
8.5 PROGRAM DEVELOPMENT
8.6 PROGRAM IMPLEMENTATION
8.7 ENFORCEMENT
8.8 STORMWATER POLLUTANT CONTROL PLAN
SECTION 9.0 INDUSTRIAL DISCHARGER IDENTIFICATION
9.1 INTRODUCTION
9.2 REGULATORY REQUIREMENTS
9.3 PROGRAM DEVELOPMENT
9.4 PROGRAM IMPLEMENTATION
SECTION 10.0 ILLICIT CONNECTION/DISCHARGE IDENTIFICATION
AND ELIMINATION
10.1 INTRODUCTION
10.2 REGULATORY REQUIREMENTS
10.3 PROGRAM DEVELOPMENT
10.4 PROGRAM IMPLEMENTATION
SECTION 11.0 WATER QUALITY MONITORING
11.1 INTRODUCTION
11.2 REGULATORY REQUIREMENTS
11.3 PROGRAM DEVELOPMENT
11.4 PROGRAM IMPLEMENTATION
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Drainage Area
Management Plan
Table of Contents
PAGE
TABLES
Table 1 NPDES Permit Progress Report Schedule 2-3
Table 2 Summary of Existing Best Management Practices 3-4
FIGURES
Figure 1 New Development Schedule
Figure 2 Construction Schedule
APPENDICES
Appendix 1 DAMP Implementation and Reporting Schedule
GLOSSARY
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EXECUTIVE SUMMARY
This document details the Drainage Area Management Plan (DAMP) to be implemented
by the Cities and the County of Orange and the Orange County Flood Control
District. Orange County's Drainage Area Management Plan was prepared in
compliance with the specific requirements of NPDES Stormwater Permits No. CA
8000180 and No. CA 0108740.
This baseline DAMP is presented as the first step of a comprehensive planning
process rather than the culmination. The plan will therefore undergo revision
as new information, particularly water quality data, becomes available.
The County and many of the cities have already been performing practices and
procedures which protect the quality of stormwater runoff, such as monitoring to
identify problems, implementing construction site and agriculture erosion and
sediment control programs, implementing a watershed sediment control program on
San Diego Creek and Upper Newport Bay, sweeping streets, managing solid waste,
initiating residential recycling programs, maintaining storm drains and catch
basins, enforcing prohibitions on illegal discharges, controlling spills,
supervising industrial waste discharges through permitting, and enforcing
ordinances prohibiting certain discharges. Through this DAMP, the co -permittees
intend to improve existing stormwater quality management practices and, where
necessary, to address identified problems and to implement new practices.
This DAMP has been formulated with the following objectives in mind:
o Meet the requirements of NPDES stormwater permits CA 0108740 and CA 8000180;
o Insure effective public participation and support;
o Focus on problems prioritized through monitoring;
o Utilize available resources effectively;
o Implement public education BMPs early;
o Detect and eliminate illegal discharges
o Evaluate opportunities for retrofitting existing structures;
o Verify Best Management Practices (BMPs) designs through experience; and
o Develop plans on a watershed basis.
Private and public sector representatives participated in developing the storm
water pollutant control programs described within this DAMP. Throughout the
DAMP's evolution, the document will be available for public review and comment.
Overall program guidance will be provided by the NPDES Technical Advisory
Committee (TAC).
This DAMP includes a glossary of technical terms, abbreviations, and acronyms
related to the stormwater pollution control -program.
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SECTION 1.0
1.0 INTRODUCTION
This document outlines Orange County's Drainage Area Management Plan to be
implemented by the cities of Anaheim, Brea, Buena Park, Costa Mesa,
Cypress, Dana Point, Fountain Valley, Fullerton, Garden Grove, Huntington
Beach, Irvine, Laguna Beach, Laguna Niguel, La Habra, La Palma, Los
Alamitos, Mission Viejo, Newport Beach, Orange, Placentia, San Clemente,
San Juan Capistrano, Santa Ana, Seal Beach, Stanton, Tustin, Villa Park,
Westminster, and Yorba Linda; the County of Orange; and the Orange County
Flood Control District within the Orange County storm water drainage
system. Newly incorporated cities and other agencies will be included in
the implementation process if they choose to participate in the National
Pollutant Discharge Elimination System (NPDES) storm water program.
The stormwater pollution control effort, of which this DAMP is a part, is
the result of twenty years of legislative effort beginning with the 1972
Water Pollution Control Act, subsequently known as the Clean Water Act.
The Clean Water Act established the NPDES and required the Environmental
Protection Agency (EPA) to issue regulations to be effective by 1983, that
include stormwater runoff from rainfall. The program was called the
National Pollutant Discharge Elimination System (NPDES).
As a result of concerns that urban stormwater runoff can carry pollutants
from diverse sources, Congress passed the Water Quality Act of 1987 which
required EPA to bring stormwater discharges into the NPDES program. These
regulations were issued on November 16, 1990.
1.1 OBJECTIVES OF THE DRAINAGE AREA MANAGEMENT PLAN
The immediate objective of this DAMP is to fulfill the commitment of the
co -permittees to present a plan that satisfies NPDES requirements. In
addition, however, there are a number of important public policy issues
which have influenced the co -permittees in framing this plan and which
consequently define the objectives of the DAMP. Resources, both public and
private, are limited. Public support•is essential. In implementing this
program it is the intent of the co -permittees to proceed in a measured,
deliberate way designed to obtain the maximum benefit for the resources
expended and to secure maximum public awareness, understanding, and
support.
The co -permittees intend to proceed with the public participation,
education, and information program immediately to raise the level of public
awareness and at the same time improve the protection of runoff water
quality. It is therefore an objective to develop and implement a
countywide program of educational BMPs as an early priority.
The co -permittees want a stormwater quality management program which
focuses resources on water quality problems, wherever identified within the
County. They also intend to have a priority system to assure that water
quality problems receive the available resources and attention. It is
10 -Dec -1991
1-1
therefore planned to analyze and evaluate the existing and future.
monitoring data to identify those watersheds exhibiting the most urgent
need for attention.
The co -permittees are aware that a successful stormwater quality management
program will depend on the awareness, commitment, cooperation, and support
of the various segments of the public, including businesses, industry,
development, utilities, environmental groups, institutions, homeowners, and
the general public. Accordingly, it is an objective of this plan to assure
an open planning process, with ample opportunity for public participation
and meaningful consideration of the input obtained. Accomplishment of this
objective will be furthered by the management structure provided herein and
by public meetings, hearings, and workshops as part of the planning and
decision-making process.
The co -permittees presently own and operate an extensive system of flood
control, drainage, recreational, habitat, and greenbelt corridor
facilities. Some of these have already been modified to yield regional
water quality benefits while still safely and reliably performing their
primary function. It is the intent of the co -permittees to evaluate
opportunities to incorporate stormwater quality features into existing
flood control structures in each Orange County watershed.
The co -permittees have considerable experience and expertise in the
planning, design and operation of flood control and drainage systems. They
are familiar with the regional watershed approach to drainage planning and
they are aware of the economic benefit of regional flood control
facilities. The co -permittees therefore intend to approach the runoff
water quality management program on the same regional watershed basis,
guided by the priorities identified through the monitoring program.
Research, technical, and engineering design data indicate that source term
quantification and design parameters are still in a developmental phase.
"This finding tends to support the need for local data before making what
may be far-reaching and expensive water quality management decisions."*
The co -permittees intend to investigate the relative cost-effectiveness of
the various structural BMP designs through a program of experimental
construction and observation.
It is an objective of the co -permittees to vigorously detect and eliminate
illegal discharges into the storm drain system. The co -permittees are
committed to the pursuit of equity in distributing the cost of
implementating of this program.
*Stormwater Detention for Drainage, Water Quality, and CSO Management, Peter-
Stahre*& Ben Urbonas, Prentice -Hall, 1990
10 -Dec -1991 1-2
Orange County's Drainage Area Management Plan was prepared in compliance
with the specific requirements of NPDES Stormwater Permits (No. CA 8000180
and No. CA 0108740). The plan proposes a wide range of Best Management
Practices (BMPs) and control techniques which will be implemented over the
term of the current permits. For planning purposes, these Best Management
Practices are organized into seven program components. The goals of these
seven components are:
I. Public Agency Activities (Section 5.0)
Improve existing city and county pollution prevention activities and
implement appropriate new practices to further reduce the amount of
pollutants entering the storm drain system. Municipal government
activities include housekeeping practices such as hazardous materials
management in maintenance yards/facilities and community services such
as street -sweeping, facility maintenance, trash removal, waste -oil
disposal, and spill response and enforcement activities_
Implement the steps described in this DAMP:
° Initiate educational BMPs throughout the County:
° Detect and eliminate illegal discharges;
° Conduct stormwater monitoring program;
° Priortize watersheds based on evaluation of monitoring data;
° Evaluate the possibility of modifying existing stormwater facilities
and/or stormwater maintenance programs to reduce pollutants in
stormwater discharges.
° Evaluate appropriate BMP candidates; and
° Implement proven cost-effective BMPs.
2. Public Education (Section 6.0)
Educate the public about the issue of nonpoint source pollution and the
practices' they can adopt that will assist in pollution prevention.
3. New Development Controls (Section 7.0)
Ensure that all new development incorporates appropriate
postconstruction nonstructural and structural BMPs, and equitably
participates in the implementation of watershed structural BMPs as
described herein.
4. Construction Site Controls (Section 8.0)
Ensure that construction sites implement pollutant -control practices
that address control of construction -related pollutants including
erosion control and on-site hazardous materials management.
10 -Dec -1991 1-3
5. Industrial Discharger Identification (Section 9.0)
Develop identification records of industrial dischargers in Orange
County.
6. Illicit Discharge/Connection Identification and Elimination
(Section 10.0)
Identify and eliminate non -permitted discharges and illicit connections
to the storm drain system.
7. Monitoring (Section 11.0)
Conduct water quality monitoring county -wide to identify areas with
i
particular water -quality problems to assist n the prioritization of
watersheds for analysis and planning, and to assist in the prioriti-
zation of pollutants to facilitate the development of specific controls
to address these problems.
Each of the seven program components is an integral pparat� f thewill tDrainage
Area Management Plan. The success of the overall program
reflect the combined impact of all program components.
1.2 "MAXIMUM EXTENT PRACTICABLE"
The federal regulations indicate that ptoposed management programs uchinvolveas
this DAMP "shall include a comprehensive planning process
whichpublic participation and where necessary intergovernmental
rcoordination,
le to
reduce the discharge of.pollutants to the maximum e entp
management practices, control techniques and systems, design and
engineering methods, and such other provisions which are appriopriate."
The Permit defines "maximum extent practicable" as follows: "Maximum
extent -practicable (MEP) means to the maximumextent possible,
takincompegiinto
account equitable considerations of synergistic, additive,
andfactors, including but not limited to, gravity of the problem,
rb em,bfiscals."
feasiblity, public health risks, societal concern, and social
Its presence places upon the co -permittees the responsibility ofweighing
economic, societal, and equity issues as they define the policies
and
standards to be employed in implementing the program.
1.3 DESCRIPTION OF DRAINAGE AREA AND CLIMATE
Orange County has an area of 500,000 acres, beginning on a coastal plain
and rising to an elevation of over 5,000 feet in the Puente
Hillsch and Sagan innta
Ana Mountains to the north and east. Before urbanization
hemeral streams and
the early 19501s, Orange Countwndrwas drainebmost of the year and carried
agricultural drainage ditches hich were y
measurable flow primarily during short duration flash floods and longer
duration general winter storms.
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As urbanization progressed, man-made agricultural drainage ditches were
enlarged to flood control channels and the few natural streams such as,
Santa Ana River and San Juan Creek were constrained within levees to
provide flood protection. Ephemeral flows in some of the man-made and
natural channels have been replaced with continuous low flows from urban
and agricultural irrigation.
Orange County's climate has hot dry summers and mild winters. Nearly all
the annual precipitation falls in only a few storm events between November
and May. During times of drought, it is not unusual for years to pass
between major rainfalls. Precipitation results from three distinct
mechanisms. The most important is the convergence mechanism associated
with general winter storms originating in Alaska and picking up moisture as
they travel south and east. The second major precipitation mechanism is
orographic lifting where moist air masses are deflected upward by local
mountains, releasing rain. Orographic rainfall is also associated with
winter rainfall. The third precipitation mechanism, which can cause
extremely intense local precipitation, is the convective thunderstorm. One
of the most intense convective rainfall events of record in Southern
California dropped 11 inches of rainfall in about 80 minutes. On occasion,
unstable tropical air masses move in from the south and produce rainfall.
These tropical air masses combine convergence mechanisms with convective
mechanisms to produce intense thunderstorms.
It is common for successive storms of varying durations and intensities to
compound their effects, with the heavy rainfall of the second or third
storm creating the most severe flood conditions. Regardless of the source
of precipitation, rainfall in Orange County is a rare event. The present
urban and former agricultural lifestyles are made possible only by large
quantities of water imported from the Colorado River and Northern
California.
1.4 IMPLEMENTATION OF THE DRAINAGE AREA MANAGEMENT PLAN
The Co -permittees will gather information from the monitoring program and
other sources to identify the source of pollutants for each identified
problem. The purpose of this effort is to assist in the investigation and
development of funding souces which equitably assess existing communities
and areas of new development in proportion to their relative contribution
to the problem. Such a policy is essential to the establishment• and
maintenance of.a broad base of community support for the program.
Since existing developed areas are on the tax rolls, any implementation
program for financing improvements and activities assessable to developed
areas will consider allocating a portion of the ad valorem tax revenue and
other municipal and County revenues for program support. Should program
requirements exceed available revenues from these sources the co -permittees,
will investigate other funding mechanisms.
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BMPs will be required for both existing developed areas and areas of new
development. The co -permittees will consider such options and will conduct
public discussions to hear the views of various members of the community.
There is ample precedent for the determination of a particular
development's share of public plan facilities, such as sewer capacity,
roads, and parks. These precedents will be considered by the TAC in its
development of the appropriate mechanism for implementing the program on a
fair share basis in areas of new development.
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SECTION 2.0
2.0 PROGRAM MANAGEMENT
2.1 INTRODUCTION
The Program's management activities include providing administrative
support for the NPDES Technical Advisory Committee (TAC); developing and
executing inter -governmental agreements necessary for program
implementation; developing reports and other materials required by NPDES
permits; developing budgets and fiscal analyses; reviewing and developing
Policy positions and representing the Program before appropriate agencies;
developing Best Management Practices (BMPs); planning activities needed to
direct the program; and program coordination with all affected local
government agencies.
A more detailed discussion of these management tasks is provided below.
2.2 MAJOR MANAGEMENT ACTIVITIES
2.2.1 DECISION MAKING
The steering group for program development and implementation is the NPDES
Technical Advisory Committee (TAC). The TAC comprises one City Engineer,
or selected representative, from each of the County Supervisorial Districts
and a representative from the County of Orange Environmental Management
Agency. This committee's mission is to provide a forum for debate on all
aspects of the NPDES Storm dater Program, and make decisions regarding
program development and implementation.
Administrative support for this committee includes maintenance of mailing
lists of participating and interested parties, reserving meeting venues,
preparing agendas and notifying participants, and preparation of minutes.
The County has established a Stormwater Section to coordinate countywide
compliance activities and submittals to the Regional Water Quality Control
Boards under policy direction of the TAC.
2.2.2 AGREEMENT FOR PROGRAM IMPLEMENTATION
The agreement underpinning County and city cooperation is the NPDES Storm
Water Permit Implementation Agreement which establishes the responsibi-
lities of each party (County, Flood Control District, and cities) with
respect to compliance with the NPDES Storm Water Permits issued by the
Regional Water Quality Control Boards (RWQCBs). This Agreement also
establishes a funding mechanism for the shared costs of the Program based
on each municipality's area and resident population.
Specific program responsibilities are as follows:
The CITIES shall, to the maximum extent practicable:
o Implement a facility inspection program in accordance with the uniform
criteria developed by the DISTRICT, for all municipal separate storm
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sewers as defined by the stormwater permit and within the jurisdictional
boundaries of that city.
o Submit storm drain maps to the COUNTY.
o Prepare watershed characterizations, including:
a. Zoning designations and
b. Identification of areas where hazardous materials are stored,
manufactured or disposed of.
o Review approve, and implement system -wide BMP's
o Eliminate or.have eliminated, illegal/illicit connections to the storm
drain system.
o Identify the legal authority for control of discharges to the storm
drain system.
o Provide the COUNTY with annual reports and any other information needed
to satisfy NPDES permit reporting requirements.
o Evaluate existing water pollution control ordinances, which prohibit non
NPDES permitted discharges to the municipal separate storm sewer system.
If legal counsel determines that new or amended ordinances are needed,
submit these in acccordance with each co-permitee's procedures.
The COUNTY and the DISTRICT shall be responsible for:
o Preparing implementation and annual operating budgets.
o Preparing compliance reports to the Regional Water Quality Control
Boards (RVQCBs).
o Preparing a draft system -wide BMP Program Report.
o Monitoring the implementation of system -wide BMP's, to evaluate
structural and procedural BMP's and preparation of an annual report
detailing results for presentation to the RYQCB.
o Performing the water quality and hydrographic monitoring for permit
compliance.
o Administering the water pollution control program.
o Developing uniform criteria for annual inspection of drainage
facilities.
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In addition, the COUNTY -will also undertake, in the unincorporated areas,
all the activities required of the cities.
The DISTRICT will also perform inspections, at no cost to the cities or the
county, on those facilities owned by the District and on municipal separate
storm sewers in unincorporated County. Contracts for such inspections
within the cities may be undertaken at the sole expense of the requesting
city.
2.2.3 NPDES PERMIT REPORTING REQUIREMENTS
The following reports will be produced under the auspices of the NPDES
Technical Advisory Committee and submitted to the Boards. The report
submittal dates are the dates that the compliance reports are due at the
Boards.
TABLE 1
NPDES PERMIT PROGRESS REPORT SCHEDULE
PROGRAM
REPORT SUBMITTAL
Water Quality Monitoring Annually 11/30
Reconnaissance Survey Annually 1/31
Drainage Area Management Plan Status Annually 8/31
Fiscal Analysis Annually 8/31
Data Analysis Annually 1/31
Program Analysis Annually 3/31
2.2.4 DAMP IMPLEMENTATION AND REPORTING SCHEDULE
The reports and tasks required by this DAMP•are listed in Appendix 1.
2.2.5 BUDGET
The County will be responsible for preparing draft annual budgets for
shared program costs. In addition, the County will track shared program
cost expenditures and prepare financial reports which will be distributed
to all the co -permittees.
2.2.6 PROGRAM REPRESENTATION
The County is a member of the State Water Resources Control Board Storm
Water Quality Task Force which assists the SWRCB in developing the NPDES
Storm Water Permit Program. The County will continue participating in the
Task Force and will report activities to the co -permittees on a regular
basis.
2.2.7 PLANNING
In accordance with the Implementation Agreement the County will administer
and coordinate Program Planning and Development.
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SECTION 3.0.
3.0 PLAN DEVELOPMENT
3.1 REGULATORY REQUIREMENTS
Section 101-Declaration.of Goals and Policy -of the Clean Water Act, as
amended .by the Water Quality Act of 1987 states:
"It is the national policy that programs for the control of nonpoint source
pollution be developed and implemented in an expeditious manner so as to
enable the goals of this Act to be met through the control of both point
and nonpoint sources of pollution."
EPA regulations require that storm water quality management plans include
programs that address four types of pollutant sources (1) Runoff from
commercial and residential areas; (2) Runoff from industrial sites;
(3) Runoff from construction sites; and (4) Non -storm water discharges.
According to the regulations, an overall drainage area management program
shall include a comprehensive planning process incorporating public
participation and intergovernmental cooperation. The drainage area
management program shall also meet the "Maximum Extent Practicable" (MEP)
standard of pollutant control. The proposed program shall also describe
priorities for implementing controls on a system wide basis, a watershed
basis, a jurisdiction basis, or on individual outfalls.
The regulations also identify specific elements for addressing runoff from
commercial and residential areas. These elements are:
o A program for maintenance activities for structural controls.
o Planning procedures to assess stormwater quality and to implement
appropriate controls to reduce pollutant discharges from areas of new
development and significant redevelopment.
o Planning procedures,to assess flood water management project impacts on
the water quality of receiving water bodies.
o A program to _evaluate the possibility of modifying existing stormwater
facilities and/or stormwater maintenance programs to reduce pollutants
in stormwater discharges.
o A program to monitor runoff from municipal waste treatment, storage, and
disposal facilities.
o A program to monitor municipal storm drain water quality.
o A program to reduce pollution associated with the application of ,
pesticides, herbicides, and fertilizer.
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The NPDES permits require development and implementation of best management
practices to control the discharge of pollutant's to waters of the United
States. The vehicle for this BMP implementation is the Drainage Area
Management Plan (DAMP) which shall include modifications to existing BMPs
and other storm water system management programs to reduce pollutants in
the storm water discharges from industrial, commercial, and residential
areas to the maximum extent practicable. Specific requirements are:
o Structural controls.
o Nonstructural controls such as education programs, management practices,
and regulatory approaches.
o Enforcement programs.
In addition, an implementation plan is required in the DAMP for site
specific structural and non-structural BMPs at construction sites
(Commercial/Industrial construction sites disturbing one acre or more of
total land area and residential construction sites disturbing 5 acres or
more). An implementation plan is also required to assure that runoff from
all new development or significant re -development is appropriately managed
to the maximum extent practicable.
3.2 PLAN DEVELOPMENT
3.2.1 APPROACH TO PLAN DEVELOPMENT
This DAMP has been developed to accomplish the objectives summarized in the
Executive Summary and in Section 1.1.
The DAMP elements fall in to two general categories: prevention of
pollutant introduction into the drainage system and removal of pollutants
from the drainage system. The prevention -oriented elements include
identification and elimination of illegal discharges, continued supervision
of permitted industrial discharges, the early implementation of
non-structural BMPs throughout the County in new developments and existing
communities, and the continued use of structural and non-structural on-site
BMPs for construction projects.
The removal -oriented element is a watershed planning program for structural
BMPs. Water quality► problems will be identified through the monitoring
program. Watersheds will be considered using the principles of MEP.
Watersheds determined to require additional BMPs will be surveyed for
potential retrofitting. Existing flood control, retarding, sediment
control, water conservation, recreation, habitat, and greenbelt facilities
will be evaluated in terms of their potential for modification to provide
water quality benefits. Where retrofitting opportunities are not found,
new structural BMPs will be considered, using the principles of MEP.
New structural BMPs will be selected from candidate BMPs which have been
field-tested and evaluated as to their pollutant removal efficiency and
cost effectiveness. New structural BMPs will be planned and located to
maximize their cost-effectiveness.
10 -Dec -1991 3-2
Structural BMP program costs will be distributed among existing developed
communities and newly developing areas in proportion to their
responsibility for the recognized water quality problem, as far as
possible. This is not intended to preclude the use of structural BMP's
within new developments to address problems identified in the watershed
planning process.
3.2.2 BMP SELECTION
Candidate non point source (NPS) control measures will be selected from
review of technical literature, review of existing NPS control programs,
and input from consulting firms and municipalities already involved in NPS
control program implementation.
A summary of existing BMP's within Orange County is presented in Table 2.
Collectively these existing BMPs provide a significant level of control for
the target NPS pollutants identified in the federal regulations and the
Region 9 NPDES permit. Furthermore, these existing BMPs include the
-permit-required structural and.non-structural controls and function as
pollutant controls in industrial, commercial and residential areas. The
DAMP focuses on improving these BMPs and setting out a timetable for
countywide implementation (see Section 5.0).
The DAMP also considers new residential and commercial/industrial sites
(Section 7.0) and construction sites (Section 8.0). Recognizing the need
for a coordinated effort to insure the successful implementation of
structural controls for storm water quality management, Sections 7.0 and
8.0 provide for development and implementation under the guidance of
steering groups that will include both public and private sector
representation.
10 -Dec -1991 3-3
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3.2.3 PLAN REVISION
The NPDES Technical Advisory Committee will review, and submit to the
co -permittees for local approval, the DAMP and admendments to the DAMP.
The documents will then be submitted to the Regional Water Quality Control
Boards
3.2.4 PUBLIC PARTICIPATION
Public participation in the preparation and amendment of the DAMP will be
encouraged in accordance with the NPDES Stormwater Permits.
3.3 FINANCING
3.3.1 WATERSHED STRUCTURAL BMPs
Financial requirements for construction, operation and maintenance of
watershed structural BMPs will be studied. Appropriate financing programs
will be proposed, including consideration of means to assure appropriate
participation by land developers and project proponents.
3.3.2 OPERATION AND MAINTENANCE
Those structural BMPs which are retrofitted existing structures will
continue to be operated and maintained by the present owners. The planning
process will include consideration and determination of maintenance
responsibility for each new structure. A funding source for the operation -
and maintenance will be developed by the TAC with the support and
discussion of the co -permittees.
NJ:lt/spPWF02-047
10 -Dec -1991 1092621283429 3-5
SECTION 4.0
4.0 EXISTING LEGAL AUTHORITY
4.1 INTRODUCTION
The NPDES Storm water Permits require implementation of a program to reduce
pollutants in storm water discharges from commercial, industrial and
residential areas to the "maximum extent practicable." Central to this
program is the establishment, by each municipality, of adequate legal
authority to regulate the discharge of pollutants to the municipal separate
storm sewer.
4.2 REGULATORY REQUIREMENTS
Section 402(p) of the Federal Water Pollution'Control Act, as amended by
the Water Quality Act of 1987, requires that municipal NPDES storm water
Permit include:
1. A requirement to effectively prohibit non -storm water discharges into
the storm sewer.
2. Controls to reduce the discharge of pollutants to the maximum extent
practicable, including management practices, control techniques and
system, design and engineering methods and -such other provisions as the
Administrator or the State determines appropriate for the control of
such pollutants.
Regulations, promulgated by EPA on November 16, 1990 (40 CFR 122.26 (d)(2))
require municipal NPDES Storm Water Permit applicants to demonstrate that
they have adequate legal authority.
4.3 AUTHORITY TO CONTROL POLLUTANT DISCHARGE
The County of Orange obtains its authority to control pollutants in storm
water discharges, to prohibit illegal discharges, to control spills, and
carry out flood control facility inspections from the Orange County Flood
Control Act and the County's Water Pollution Ordinance.
The Orange County Water Pollution Ordinance regulates discharges associated
with industrial activity by prohibiting the dumping or discharge of
"industrial waste" by any individual in a manner that "will or may cause or
result in the pollution of any underground or surface waters..." The
ordinance also establishes the -requirement for an industry to obtain a
permit from the County if it intends to discharge. A permit may be issued
if it is found that discharges will not result in pollution of ground or
surface waters if it is found necessary to dispose of wastes in such a
manner.
The county has the authority to enforce and to administer the provisions
- contained in the ordinance, including the authority to inspect any
violation. The county also has the right to revoke a permit if it sees
fit.
f-'
09 -Dec -1991 4-1
Of the county's twenty-nine constituent cities, eighteen have adopted a
similar or share the same water pollution ordinance.
In addition to the Water Pollution Ordinance, the Orange County Code
establishes its authority to regulate various discharges in other
ordinances.
° The County Solid Waste Management Ordinance regulates where solid and
liquid wastes, including hazardous and industrial wastes may and may not
be deposited or discharged.
° The Harbor Sanitation Ordinance prohibits discharge of any refuse matter
of any description from shore or sea into the "navigable waters of a
harbor."
° The Uniform Fire Code prohibits the discharge of any waste liquid
containing crude petroleum or its products "into or upon" any drainage
canal or ditch, storm drain,.sewer, ... or upon the ground."
4.4 SUMMARY
Under existing codes, Orange County and eighteen of the twenty-nine cities
have adequate legal authority to regulate (control, inspect, and enforce)
discharges of pollutants to the municipal storm drains. The County's
Water Pollution Ordinance, in particular, establishes authority of the
County of Orange to inspect any violations.
4.5 RECOMMENDATIONS
Prepare a study for review and consideration by the NPDES TAC and
co -permittees which:
° Details existing legal authority of each co -permittee.
° Drafts amendments to existing regulations, if necessary, to adequately
regulate and control pollutants in stormwater discharges as required by
NPDES regulations.
After review and consideration of existing legal authority, the TAC will
make recommendations to co -permittees regarding necessary actions they must
take to comply with NPDES regulations.
4.6 IMPLEMENTATION SCHEDULE
° Select consultant to complete study by July 1, 1992.
° TAC recommendations to co -permittees by July 1993.
NJ:ltPWF02-047
09 -Dec -1991 1092621210811 4-2
SECTION 5.0
5.0 PUBLIC AGENCY ACTIVITIES
5.1 INTRODUCTION
All of the municipal NPDES Storm Water Permit co -permittees routinely
conduct preventive maintenance activities that are widely recognized as
effective Best Management Practices for nonpoint source pollutant control.
One objective of this component of the Drainage Area Management Plan is to
evaluate these existing public agency activities and, where necessary,
implement improvements or new practices to reduce the amount of pollutants
entering the storm drain system to the maximum extent practicable within
financial and staffing constraints.
Other objectives are set forth in Section 1 including implementing the
steps described herein leading to development and implementation of
priority watershed plans, and operating and maintaining the watershed plan
structures. Information required from the co -permittees will be submitted
to County staff for compilation into progress reports. All co -permittees
will be responsible for implementing the Public Agency Activities. '
5.2 EXISTING MUNICIPAL GOVERNMENT ACTIVITIES
5.2.1. Litter Control
1. Recommendations
o Evaluate the need for litter control regulation amongst
co -permittees and propose draft ordinance or changes to existing
ordinances if necessary.
o Include trash collection in routine maintenance of recreational
facilities such as City/County parks and document materials
collected.
2. Schedule
o Report existing litter control regulations by July 31, 1993.
o Report frequency of routine trash collection at public facilities
and evaluate the effectiveness of routine collection. The volume of
trash collected per month through routine maintenance of public
facilities will be included. Submit this information by July 31,
1993, and every year thereafter for use in the annual Progress
Report.
5.2.2 Recycling
Community programs for collection and recycling of.non-hazardous solid
wastes have already been initiated statewide in response to the California
Integrated Waste Management Act of 1989.._.
09 -Dec -1991 5-1
Municipal programs to collect recyclable materials are currently conducted
in twenty-seven of Orange County's twenty-nine cities. In addition,
collection centers, as required by California Law, are operated countywide
in public places such as shopping centers so that recyclables can be
deposited on a daily basis.
No improvements to these programs are proposed as part of the Drainage Area
Management Plan. A reporting procedure will be implemented so that the
volume of potential pollutants diverted from.the storm drain system can be
recorded. The specific information to be recorded, will be in accordance
with the existing requirements of AB 939.
1. Recommendations
o Identify constituent materials (Article 2, Section 41030).
- Volume
- X by weight or volume
- Material type
- Source of generation (residential, commercial, industrial etc.)
o Describe methods used to determine the amount and categories of
solid wastes (Article 4, Section 41071).
2. Schedule
o Submit a copy of the information required for AB939 (and a brief
description of the programs). Include any public education fliers.
Submit this information by July 31, 1993 and every year thereafter
for use in the annual Progress Reports.
5.2.3 Drainage Facility Maintenance
All of the Orange County co -permittees clean out the storm drain inlets,
catchbasins, and lines within their jurisdictions. Generally this work is
performed on an as -needed basis.
1. Recommendations
o Inspect facilities regularly to determine if service is required.
- Open Channels: Inspect annually before storm season; remove
debris as necessary.
- Underground facilities 39" and larger diameter: Inspect every
two years; remove debris as necessary.
- All facilities: Remove debris and sediment either manually or by
mechanical methods; use flushing in emergency situations only.
o Special catch basins and other storm drain inlets.
- Refer to Section 5.2.4.
09 -Dec -1991 5-2
2. Schedule
o Provide sample copies of inspection and maintenance logs. Submit by
July 1, 1992.
o Submit data tables that document the number of drains cleaned,
amount of debris/sediment collected, length of channel/pipe
cleaned per year by July 31, 1993 and every year thereafter for the
annual Program Report.
5.2.4 Catch Basin Stenciling
The goal of the stenciling program is to label and subsequently maintain
labels on stormdrain inlets throughout Orange County. Initially the
label will comprise NO DUMPING - DRAINS TO OCEAN written in 3" black
letters on either the top of the curb or the curb face adjacent to the
inlet. Each co -permittee, however, may implement its own variation of
this catchbasin stenciling program.
1. Establish stenciling program and complete by 1995.
2. Schedule
o Complete catchbasin stenciling by the end of the permit in 1995.
Submit number of catchbain stenciled to date on July 31, 1993 and
every year thereafter for the annual progress reports.
5.2.5 Street Sweeping
Currently, all the Orange County co -permittees maintain street -cleaning
programs which sweep residential, commercial and industrial areas at least
once a month. Most sweep on a weekly basis using rotating brush sweepers.
A method for evaluating the effectiveness of street sweeping county -wide is
not currently available. It is recommended that a procedure for detailed
record keeping of street cleaning operations be implemented.
1. Recommendations
o Implement documentation of street sweeping activities.
Quantify amount of material collected each month.
- Use log sheets to document miles of street swept, sweeping
schedule, and sweeper type.
o Consider vacuum sweepers when purchasing new equipment because
they are more efficient at fine particle removal and can
additionally be used for leaf collection and catch basin
maintenance.
o Review, implement and enforce parking controls to coincide with
sweeper schedule.
09 -Dec -1991 5-3
2. Schedule
o Submit in table form the areas (specify land use) swept, total
miles covered, and the amount of trash collected in each area per
month. Also include sample copies of any other log sheets used for
internal documentation of the program. Provide this information
by July 31, 1993, and every year thereafter for use in the annual
Program Reports.
5.2.6 Hazardous Materials Management
The activities at various City and County facilities involve the use of
hazardous materials and the generation of hazardous wastes. These
materials include paints, solvents, pesticides, fertilizers and motor oil.
All municipalities will review.and where appropriate implement improvements
to hazardous materials management practices. These practices may be
structural, such as covering storage/transfer areas and construction of
secondary containment structures, and non-structural such as improved
inspection procedures.
1. Schedule
o Prepare a list of improvements made to the facility hazardous
material storage site to reduce potential discharge of pollutants to
the stormdrain. Submit updated list by July 31, 1993 and every year
thereafter for the annual Progress Reports.
5.2.7 Household Hazardous Waste Collection
Orange -County has an effective household hazardous waste collection program
administered by the Integrated Waste Management Department. Refer to
Section 6.3.2 for a detailed description of this program.
5.2.8 Facility Oil Recycling
Recycling oil is one way of preventing improper disposal and reducing the
amount of hazardous waste generated.
1. Schedule
o Provide a log sheet or data table quantifying the amount of oil
collected each month and submit by July 31, 1993 and every year
thereafter to include in the annual Progress Reports.
5.2.9 Fertilizer Management
Fertilizer management is the most effective means of controlling nutrient
loss from landscaped areas. The development of proper fertilizer
management is thus an important element of the Drainage Area Management
Plan. Specific recommendations focus on the implementation of guidelines
for public agency activities.
09 -Dec -1991 5-4
1. Recommendations
o Establish guidelines for fertilizer application and landscape
maintenance.
- Specify the appropriate type and amount of fertilizer by using
soil testing or other techniques.
- Apply only what is needed or appropriate for the type of plants
being grown.
- To minimize surface runoff incorporate fertilizer into the soil
and do not overwater after application
- Use compost, peat, or mulch where applicable to increases soil
porosity and thus water retention
- Immediately clean up any fertilizer spilled on roads or
sidewalks.
2. Schedule
Submit by July 31, 1992 Fertilizer Management Guidelines which would
include application frequencies, types of fertilizer used, and
concentration per unit area and location of sites where fertilizer is
applied.
5.2.10 Pesticide and Herbicide Management
A Pesticide and Herbicide Management Plan will be developed. This plan
will address both acute toxicity concerns and chronic exposure concerns.
1. Acute toxicity problems normally occur when concentrated pesticide and
herbicides are being improperly stored, transported or mixed. Specific
management procedures that address acute toxicity concerns are:
o Secure pesticides, herbicides, and application equipment to prevent
tipping or excess jarring. Carry these materials in a part of the
vehicle totally isolated from people, food and clothing during
transportation.
o Bring to the work site only the amount of pesticide needed for the
days use.
o Inspect daily for leaks, equipment used to store, transport, mix, or
apply pesticides and herbicides.
o Do accident pre -planning. In the unlikely event of a spill, take
the following immediate actions:
09 -Dec -1991 e- 5-5
Stop the spill
Warn others
Isolate thetarea
Minimize your own and others, risk.
2. Consideration of long term chronic toxicity requires much broader
program evaluation. OCEMA Public Works Operations, for example, uses
new equipment and careful scheduling to maximize the Pacific Flyaway
habitat value of the Santa Ana River. The framework for that
evaluation is detailed below and will be applied in this DAMP:
o Maintain a list of pesticides, herbicides and their specific uses.
This information should already be documented through Hazardous
Material Disclosure Requirements.
o Establish proper application methods and procedures
- Always follow label instructions.
- Note hazards related to the physical form of pesticide or
herbicide (dust, granular, spray).
- Apply pesticides and herbicides in the quantities and
frequencies recommended.
- Maintain application equipment.
- Consider factors that may influence -the type and amount of
pesticide or herbicide used, such as weather/soil conditions,
area drainage patterns, and non -target organisms.
o Establish controls to prevent surface and groundwater contamination.
Use only what is needed to prevent excess runoff.
Equipment and containers should be cleaned only in areas
registered for use of pesticide or herbicide and where
accidental spills will not pollute water resources or
contaminate the soil. Water used for cleaning equipment and
triple -rinsing pesticide containers should be collected and used
to dilute the next pesticide mixture. Triple -rinsed containers
can be disposed as trash.
o Establish storage and disposal procedures.
o Evaluate less toxic alternatives to pesticides and herbicides
(eliminate carcinogens, teratogens).
o Consider whether broad spectrum or single specific use materials
might be more appropriate in a given situation.
09 -Dec -1991 5-6
o Consider pesticides that degrade more quickly, bind more strongly
to soil particles, and have low water solubility.
o Pesticide/Herbicide use must be supervised or performed by an
individual with a California Pesticide Applicators Certificate.
o A pest control advisor must provide a signed recommendation to an
applicator describing the proper methods (e.g., - application
rate) for using a specific pesticide or herbicide.
o Each co -permittee should review State (CCR Title 26) and Federal
(40 CFR 162-180) pesticide storage and labeling requirements.
3. Schedule
o Submit a model Pesticide/Herbicide Evaluation & Management Plan
incorporating the BMPs by July 31, 1992.
NJ:ltPWF02-047
09 -Dec -1991 1092621020491 5-7
SECTION 6.0
6.0 PUBLIC INFORMATION
6.1 INTRODUCTION
Public education is an essential part of a BMP program. Developing
programs to inform and involve the public can be an effective method for
controlling nonpoint source pollution. When a community has a clear idea
where the pollution comes from, how it can affect them and what they can
do to prevent those affects, it will be more willing to support and
participate in program implementation.
6.2 REGULATORY REQUIREMENTS
The federal regulations specifically require, as part of the drainage
area management plan, a description of educational activities, public
information activities, and other appropriate activities to facilitate
the proper management and disposal of used oil and toxic materials
(Federal Register/Vol. 55, No. 222, p. 48071).
In addition, the regulations also specify education programs for
construction site operators and a program to facilitate public reporting
of illicit discharges.
The NPDES permits similarly follow federal requirements and specify as a
component of the Drainage Area Management Plan education programs to
educate the public on proper disposal of hazardous/toxic wastes. These
may include public workshops, meetings notifications by mail, collection
programs for household hazardous wastes.
6.3 PUBLIC INFORMATION AND EDUCATION
The primary goal of the public education programs is to inform the
community about the origins and causes of nonpoint source pollution and
to constructively involve the public, municipalities, businesses,
industries and development community in the Storm Water Program's
objective of controlling nonpoint source pollution at its source.
Achievement of this goal will require development of materials to explain
the nature of nonpoint source pollution and its significant contribution
to water quality impairment and to identify and promote behavioral
changes that will contribute to controlling pollutants at the source.
In addition, the program will coordinate activities with other agencies
running public information programs such as water districts, sanitation
districts, fire departments and community and environmental groups.
6.3.1 Nonpoint Source Pollution Awareness
Raising public awareness of nonpoint source pollution and Orange County's
stormwater program will entail development of informational materials
aimed at local officials, public agency personnel and the general public.
09 -Dec -1991 6-1
The County of Orange will coordinate a County -wide public awareness
program for the benefit of all co -permittees. This will he a regional
public outreach program addressing storm water quality problems and
solutions applicable to all co -permittees. Individual co -permittees, at
their option and expense, may choose to enhance the regional information
to address specific storm water quality problems.
The County -wide public awareness program will include placing storm water
quality articles in EMA's existing Flood Awareness program newsletters;
preparing and distributing a stormwater pollution brochure and poster;
and incorporating a storm water pollution features into EMA's County fair
booth, community fair booths, and speaking engagements.
Regional public information materials will be distributed to each of the
co -permittees who will in turn make the materials available at the Orange
County, community and industrial fairs, disaster preparedness fairs,
community facilities, and public libraries.
6.3.2 Household Hazardous Waste Collection
Orange County has an active and effective household hazardous waste
collection program. This program is administered by the Orange County
Integrated Waste Management Department. The goals of the program are to
educate residents about household hazardous materials, influence buying
habits to decrease the amount of hazardous materials used, and offer a
safe and proper method to dispose of hazardous materials.
The program consists of four fixed collection sites and a Community
Awareness Program (CAP). The CAP has made numerous public presentations,
by staff and trained volunteers, to schools, civic organizations, and
private industries. A "Healthy Home" video and a 24-hour hotline are
used to promote program awareness.
In addition, many public information strategies are used to inform the
public of .the availability of household hazardous materials collection
.centers. These strategies include fact sheets in utility bills, radio
and television public service announcements, and newspaper
advertisements.
The existing household hazardous materials program fulfills NPDES
requirements.
NJ:ltPWF02-047
09 -Dec -1991 1092620545449 6-2
SECTION 7.0
7.0 NEW DEVELOPMENT
7.1 REGULATORY REQUIREMENTS
The federal regulations specify that drainage area management programs
include "a description of planning procedures including a comprehensive
master plan to develop, implement, and enforce controls to reduce the
discharge of pollutants... from areas of new development and significant
redevelopment."
The RWQCBs have indicated that the need for individual storm water
quality management plans applies equally to private and public works
projects (Adelson pers. comm.). Transportation corridors, schools,
parks, flood control projects and other public facilities will thus be
subject to the same requirements as planned communities and mini -malls.
The Government Code prevents city/county regulation of other public
entities such as school, sanitation, and water districts. The NDPES
permits, however, identify these entities as potential dischargers of
storm water to the Orange County drainage area and the expectation is
that these entities will work cooperatively with the co -permittees to
manage urban Storm Water runoff. These entities include: Caltrans,
Universities and Colleges, Metropolitan Water District, Department of
Defense, School Districts, Sanitation Districts, Water Districts, and
Railroads.
7.2 PROGRAM DEVELOPMENT
The program will be developed using the principle of Maximum Extent
Practicable, and the following application of.BMPs.
7.2.1 Each new development will be required to implement appropriate
non-structural BMPs in keeping with the size and type of
development, to minimize the introduction of pollutants into the
drainage system.
7.2.2 Each new development will also be required to implement
appropriate "routine" structural BMPs in keeping with the size and
type of development. "Routine" structural BMP's are economical,
practicable, small scale -measures which can be feasibly applied at
the smallest unit•of development, using standard plans to be
developed by the New Developments Task Force. Routine structural
BMP's may function either to minimize the introduction of
pollutants into the drainage system or to remove pollutants from
the drainage system. Routine structural BMP's are intended to
address drainage water quality impacts inherent in development,
and need not be related to any identified water quality problem.
09 -Dec -1991 7-1
7.2.3 "Special" structural BMPs will be installed in new development
to address specific water quality problems identified in the
watershed planning process. This requirement may be addressed by
providing an on-site "special" structural BMP, or by contributing
to the implementation of a structural BMP specified in the
watershed plan.- "Special" structural BMP's are engineered
facilities designed to address specific 'pollutant problems
identified in the watershed planning process, runoff management
plan, CEQA process, or similar watershed planning. However, it is
not the intent of this program to restrict city or county planning
commissions or their governing bodies from imposing additional
stormwater management requirements as a condition of development.
Compliance with these requirements necessitates development of a program
to ensure that storm water quality management is considered during a
project's planning phase, implemented during construction, and ultimately
maintained for the life of the project. In addition, the program must be
adopted and uniformly enforced by all municipalities.
As described in Section 1, this DAMP is comprised of preventive and
corrective (removal) measures. Applying this concept to new development,
it is intended that each new development will implement an approved
program of BMPs in the new community to minimize the amount of pollution
entering the drainage system. The TAC, through its New Development Task
Force, will develop guidelines for use by co -permittees and developers.
Guidelines may include items such as conditions of approval, homeowner
association conditions and covenants, ordinances, and community education
and information.,
7.3 PROGRAM PLANNING
The requirement for a post construction storm water quality management
plan will be specified in each co-permittee's.standard conditions of
approval. These conditions will require project proponents to submit for
approval a proposal identifying the BMPs that will be incorporated into
the project to control non -point source pollutants after construction.
Standard Conditions of Approval will be developed and implemented
countywide as particular areas of concern are identified. Specific
conditions will also be developed, with industry involvement, for certain
types of new development such as gas stations, automotive centers, and
food outlets.
In order to'pzocess storm water pollutant control proposals, planning
approval procedures will have to be modified to ensure that these
proposals represent "maximum extent practicable" levels of
implementation. This modification may include formulation of procedures
and guidelines for staff review of submittals, creation of guidance
documents or checklists for the reviewing staff,'and development of a
program to communicate municipal control plan expectations to contractors
and developers requiring guidance.
09 -Dec -1991 7-2
The final planning phase consideration is education, specifically, the
need to inform developers and contractors of pollutant control
requirements for construction of all new developments irrespective of
size.
7.4 PROGRAM FINANCING
Each developer will finance and implement the construction site controls
specified in this program and will institute the appropriate BMPs. To
the extent the completed area of new development with the non-structural
BMPs in place can reasonably be expected to contribute to the watershed
problem identified=in the monitoring and watershed prioritization
programs (applying the criterion of MEP) the developer will be required
to contribute to the watershed program. This can be accomplished by
establishing for each watershed a drainage water quality plan and funding
program.
7.5 PROGRAM IMPLEMENTATION
o Refer to New Development Program Schedule in Figure 1.
o Establish a New Developments Task Force representing Co -Permittees
and the BIA to provide program guidance in all aspects of its
development and county -wide implementation.
o Develop and implement "non-structural" BMPs and submit initial
report.
o Develop and implement "routine" structural BMPs and submit initial
report.
o Finalize standard conditions of approval.
o Develop evaluate, and implement cost-effective "special"
structural BMPs as indicated by the watershed planning process.
o Develop and adopt site specific conditions of approval for special
developments such as gas stations, automotive repair facilities,
food outlets, and other potentially significant sources of urban
pollutants.
o Develop a guidance document to ensure the uniform processing of
storm water quality control plan proposals. This manual would
provide checking guidelines, criteria for determining appropriate
BMPs and MEP level of implementation, routing procedures,
schedules, and a tracking system. This manual may be
"personalized" by individual co -permittees.
o Identify organizational responsibility for processing storm water
quality control plan proposals.
09 -Dec -1991 7-3
o Develop an education program for developers and contractors.
Educational materials and program may include:
- Brochures
- coordination with construction and development organizations such
as the BIA.
- providing speakers for seminars and conferences.
.GN/NJ:ltPWF02-047
09 -Dec -1991 1092620441171 7-4
SECTION 8.0
8.0 CONSTRUCTION
8.1 INTRODUCTION
Concern over construction sites as a major source of sediment and other
pollutants is addressed in the federal regulations, which require a
description of a program to implement and maintain structural and
nonstructural BMPs to reduce pollutants in storm water runoff from
construction sites. Specific components of the program are to include a
description of procedures for site planning that incorporate
consideration of potential water -quality impacts; a description of
requirements for nonstructural and structural BMPs; a description of
procedures for identifying priorities for inspecting sites and enforcing
control measures that consider the nature of the construction activity,
topography, and the characteristics of soils and receiving water quality;
and a description of appropriate educational and training measures.
In addition to sediment, construction sites may be a source of pollutants
such as paints, lacquers, and primers; herbicides and pesticides;
landscaping and soil stabilization residues; soaps and detergents; wood
preservatives; equipment fuels, lubricants, coolants, and hydraulic
fluids; and cleaning solvents. .
These pollutants can leak from heavy equipment, be spilled, or can be
eroded by rain from exposed stockpiles. Once released, they may adsorb
onto sediment particles and can be transported into the aquatic
environment, where they may become available to enter aquatic food
chains, cause fish toxicity problems, contribute to algal blooms, impair
recreational uses, and degrade the water as a drinking source.
Sediment controls for construction activity directly impacting a
watercourse should address sediment transport issues in the watercourse
so that the natural quantity of sediment is not significantly changed.
Contaminated sediment must be prevented from reaching the watercourse.
8.2 REGULATORY REQUIREMENTS
The municipal NPDES permits state that ... "industrial/commercial
construction operations that result in a disturbance of one acre or more
of total land area ... and residential construction sites that result in
the disturbance of five acres or more ... shall be required to develop and
implement BMPs... to control erosion and siltation and contaminated runoff
from the construction sites."
Construction activities disturbing five acres or more of land will also
be required to comply with a general Industrial NPDES Storm Water Permit
from the State Water Resources Control Board. It is probable, however,
that local government agencies will continue to be at the front of
construction site regulation.
09 -Dec -1991 8-1
8.3. EXISTING CONSTRUCTION PRACTICES
All public works construction contracts administered by the co -permittees
are governed by "Standard Specifications for Public Works Construction"
(the "Green Book"). Green Book Section 7 - "Responsibilities of the
Contractor" imposes specific construction practices which are hereby
included as Best Management Practices for public works construction. In
general, the Green Book requires the Contractor to keep informed of, and
at all times observe and comply with, State and National laws and County
and Municipal ordinances and regulations.
The Green Book requires contractors, among other things, to: keep
equipment in good condition (i.e., no fluid leaks) and insure that
equipment and facilities meet requirements of ordinances and laws; keep
the work site clean and free from rubbish and debris; use a street
sweeper to keep paved areas clean; clear the work.site of equipment and
unused materials; prevent spillage on haul routes, and immediately remove
spillage and clean the area; remove excavated material from catch basins
or similar structures; comply with air pollution regulations; provide
sanitation and control wastewater; provide water pollution, mud, and silt
control to protect channels, storm drains, and bodies of water; and
maintain drainage within and through the work site.
In addition, certain public works construction contracts administered by
the co -permittees may include Special provisions and approved Standard
Plans. Applicable Special Provisions and Standard Plans are hereby
included as Best Management Practices for public works construction.
8.4 EXISTING SEDIMENT CONTROL PROGRAMS
8.4.1 Grading Codes
The co -permittees enforce
from erosion and failure.
watercourses and adjacent
blowing dust.
8.4.2 "208" Program
strict grading codes designed to protect slopes
These codes are also designed to protect
property from the effects of eroded soil or
The 208 Areawide Waste Treatment Management Plan, mandated by
Section 208 of the Clean Water Act of 1972, was prepared by the Southern
California Association of Governments (SCAG), eight participating local
agencies, and the Los Angeles, Santa Ana, and San Diego Regional Water
Quality Control Boards. The 208 Plan was adopted in 1979 as a
management plan for nonpoint source waste and associated water quality
degradation.
The Plan addressed nonpoint sources of waste associated with urban,
agricultural and construction activities. Agriculture and construction
activities were identified as significant sources of sediment to the
Upper Newport Bay through direct rainfall and drainage across such lands
and established drainage channels.
09 -Dec -1991 8-2
As part of the 208 Plan, the Water Quality Action Plan gives priority to
the restoration and protection of the Newport Bay. The Action Plan
consists of land management practices to reduce sediment at its source
and structural measures to localize sediment deposition and facilitate
its removal. This is proposed through channel stabilization and use of
retarding basins. Sediment control activities continue in the Newport
Bay Watershed, together with a sediment monitoring program.
8.4.3 Agricultural Best Management Practices
The purpose of the Agricultural Best Management Practices (AgBMP)
Program is to reduce the rate of sedimentation in Upper Newport Bay
using erosion control measures within the agricultural areas of the San
Diego Creek Watershed.
The role of the Orange County Envirolhmental Management Agency (OCEMA),
in the AgBMP Program, is to ensure the voluntary implementation of
erosion control measures, based on AgBMPs, by The Irvine Company (TIC),
the major agricultural land owner, and to report to the Regional Water
Quality Control Board (RWQCB).
This role is defined in a Memorandum of Agreement (MOA), of June 1983,
between Orange County and the RWQCB. The MOA obliges OCEMA to request
landowners in the unincorporated areas of the watershed to develop and
implement Resources Conservation Plans. OCEMA is also obliged to submit
tri -annual reports, to the RWQCB, detailing the status of AgBMP
implementation.
Since the inception of the AgBMP Program, OCEMA has been fulfilling its
obligations, under the MOA, with technical assistance from the
Riverside -Corona Resource Conservation District.
8.5 PROGRAM DEVELOPMENT
The problem of construction site erosion and sediment loss has long been
recognized by the co -permittees. Consequently City and County grading
ordinances and codes, the Green Book, and Public Works construction
specifications already contain adequate requirements for construction
practices for erosion control.
Full compliance with NPDES permit requirements, however, will require
changes in grading practices to recognize sediment balance concepts,
control of regulated materials used on the job site, and control of
sediments polluted by contaminants.
Control of stormwater pollution associated with construction will be
handled through the existing grading, building permit, and public works
contracting process.
8.6 PROGRAM IMPLEMENTATION
8.6.1 Refer to Construction Program Schedule in Figure 2.
09 -Dec -1991 8-3
8.6.2 Establish a Construction Site Task Force under the direction of the
NPDES Technical Advisory Committee to provide program guidance in all
aspects of implementing a construction stormwater pollution program.
8.6.3 Verify to what extent existing codes, ordinances, and public works
construction 'specifications can be applied to stormwater pollution
problems. Refer to Section 4.0 for a detailed description of existing
legal authority and actions to be taken to comply with Federal
regulations.
8.7 ENFORCEMENT
Grading and building inspectors will insure compliance with NPDES
regulations as part of their present jobs.. Inspection program elements
specifically addressing stormwater pollution will include:
o Inspection at the beginning of construction to•verify that required
nonstructural or structural stormwater pollution control measures
are in place.
o Inspection during storm events.
o Inspection shortly before notice of completion is filed.
8.8 STORMVATER POLLUTANT CONTROL PLAN
Preparation of a stormwater pollutant control plan will be the
responsibility of the project proponent. The stormwater pollutant
control plan may be incorporated into the erosion control plan. The
proponent may delegate the authority to prepare the plan to the
contractor. The plan will include as a minimum:
o Limits of disturbance (e.g. grading, clearing and grubbing, or
pavement removal limits).
o An estimation of sources and quantities of stormwater pollutants. On
large projects, hydrologic routing of stormwater runoff may be,
required.
o For construction affecting a natural or unlined watercourse, a
description of sediment or other controls to prevent erosion or
silting of the watercourse.
o Appropriate Best Management Practices to reduce stormwater pollutants
to the maximum extent practicable.
NJ :1 t PWF02-047
09 -Dec -1991 1092620360018 8-4 .
SECTION 9.0
9.0 INDUSTRIAL DISCHARGER IDENTIFICATION
9.1 INTRODUCTION
The objective of the Industrial Discharger Identification Program is to
identify industrial stormwater dischargers in Orange County and notify
them of State industrial stormwater permitting requirements. This
program is designed to provide coordination between the co -permittees and
industrial dischargers in order to comply with the separate requirements
of municipal and industrial stormwater discharger regulations.
9.2 REGULATORY REQUIREMENTS
Code of Federal Regulations Part 40 Section 122.26 (a) (4) requires
industrial stormwater dischargers to notify operators of municipal storm
drain systems receiving industrial stormwater discharges. Industrial
stormwater dischargers will notify the co -permittee owning the storm
drain into which the industrial stormwater flows. Municipal storm water
permits issued by the San Diego (No. CA 0108740) and Santa Ana (No. CA
8000180) Regional water Quality Boards state that industrial dischargers
are required to cooperate with the County, and are further required to
obtain individual industrial stormwater discharge permits from the
Regional Boards.
Regulations proposed after the municipal storm water permits were issued
will require industries to apply for coverage under a general regulatory
permit issued by the State Water Resources Control Board.
In either case, the regulatory intent is for the co -permittees to
maintain records of notifications submitted by industrial dischargers.
Regulation of industrial discharges will be a Region or State
responsibility.
9.3 PROGRAM DEVELOPMENT
A central database will be developed which will consolidate the 40 CFR
122.26 (a) (4) notifications, the current NPDES permit holders, and
industries whose SIC codes are identified by the State Water Resources
Control Board as requiring coverage under the State's General Industrial
NPDES Storm Water Permit. The database will provide the basis for a
single notification to all the identified industrial facilities informing
facilities' staff.of the existence of the NPDES storm water program and
possible state general permit application requirements. This countywide
notification will be undertaken by county staff on behalf of all the
co -permittees.
9.4 PROGRAM IMPLEMENTATION
o Define and compile database.
09 -Dec -1991 9-1
o Prepare information pack for industry.
o Complete one-time distribution of information materials by July 1992.
NJ:1tPWF02-047
09 -Dec -1991 1092620314365 9-2
SECTION 10.0
10.0 ILLICIT CONNECTION/DISCHARGE IDENTIFICATION AND ELIMINATION
10.1 INTRODUCTION
Major sources of contamination in urban and stormwater runoff are
illicit connections and illegal discharges. An example of an illicit
connection is a pipe discharging sewage into the storm drain system.
An illegal discharge would include dumping waste materials such as
motor oil, antifreeze, paints or pesticides directly into a catchbasin
or flood control facility. In order to reduce the pollutant load from
these sources, a facility inspection and documentation program has
been developed by the Co -permittees.
10.2 REGULATORY REQUIREMENTS
The Orange County NPDES Permits, as mandated by Federal regulation,
require a reconnaissance survey be conducted to identify illicit
connections and illegal discharges to the storm drain systems. On
January 31, 1991, a proposed field manual was submitted to the Santa
Ana and San Diego Regional Water Quality Control Boards outlining
general procedures for inspecting the drainage facilities and
detecting contamination. The permits also include requirements for:
o Ordinances prohibiting illegal drainage entries and improper
disposal (see Section 4).
o An implementation plan for prosecuting violators and eliminating
illegal discharges, to be submitted by January 31, 1992.
10.3 PROGRAM DEVELOPMENT
Draft inspection procedures were prepared by the Orange County
Environmental Management Agency/Public Works Department and presented
to the co -permittees for review. The proposal submitted to the Water
Quality Control Boards establishes facility inspection frequencies,
documentation requirements, and pollution reporting procedures.
Open storm channels, retention basins and other above ground
facilities will be inspected on an annual basis. Underground storm
drains with diameters of 39 inches or greater will be inspected
biannually. Facility inspection frequencies will be re-evaluated in
cooperation with the Cities and the RWQCB's after all co -permittees
have completed the first round of inspections. Based on this review,
the frequencies may be modified.
Inspectors will be responsible for maintaining the proper program
documentation. Any suspected•7'illegal discharge discovered during
inspections must be recorded on a field log and reported to the
appropriate water pollution response/enforcement agency for further
investigation. All undocumented drainage entries will also be logged,
identified on a map and forwarded to the appropriate local agency for
09 -Dec -1991 10-1
verification of permit status. Action will be taken to approve
undocumented connections into the municipal storm drain system by
permitting or pursue abatement of those entries if determined to be
illegal.
10.4 PROGRAM IMPLEMENTATION
The County and the City •of Huntington Beach have implemented facility
inspection programs. The remaining Cities will be submitting
implementation schedules to be included in the January 31, 1992
Reconnaissance Survey progress report. The progress report will also
contain the following information:
o Analysis of the inspection results.
o Information used to identify illegal discharges/illicit connections
(i.e., - visual observations, land use).
o A list of identified or suspected illegal dischargers.
o Identify large industrial facilities where hazardous/toxic substances
are stored and/or used.
o Provide a list of local landfills, hazardous waste disposal,
treatment, and recovery facilities and any known spills, leaks or
other problems in the area.
o A discussion on all activities, related to the survey, conducted
during the past year.
NJ :1 t PWF02-047
09 -Dec -1991 1092620255116 10-2
SECTION 11.0
11.0 WATER QUALITY MONITORING PROGRAM
11.1 INTRODUCTION
A water monitoring program has been developed and implemented to
detect and control illicit/illegal discharges to municipal separate
storm drain systems. The monitoring program includes field
screening, storm sampling and; dry -weather sampling to identify
sources and concentrations of pollutants.
The identification of sources which contribute pollutants to storm
sewers is a critical step in characterizing the nature and extent of
pollutants in discharges and in developing appropriate control
measures.
11.2 REGULATORY REQUIREMENTS
Federal regulations require operators of municipal storm sewers to
develop a "proposed monitoring program for representative data
collection for the term of the permit that describes the location of
outfalls or field screening points to -be sampled (or the location of
instream stations), why the location is representative, the frequency
of sampling, parameters to be sampled, and a description of sampling
equipment."
The objectives of the monitoring program as stated in the Permit are:
11.2.1 To define the type, magnitude (concentration.and mass load) and
sources of pollutants in the storm water system discharges within
each permittees respective jurisdiction so that appropriate pollution
prevention and correction measures can be identified;
11.2.2 To evaluate the effectiveness of pollution prevention and correction
measures; and
11.2.3 To evaluate the compliance with water quality objectives established
for the storm water system or its components.
11.3 PROGRAM DEVELOPMENT
From 1973 to 1990, the Environmental Resources Division of the County
of Orange Environmental Management Agency conducted routine water
quality monitoring on drainage facilities which are tributary to
water bodies identified as waters of the state by the San Diego and
Santa Ana Regional Quality Control Boards. The receiving waters were
also monitored routinely to assess the chronic effects on established
beneficial uses.
09 -Dec -1991 11-1
When the storm channel monitoring program was initiated in 1973,
monthly nutrient and trace element sampling was performed at several
locations. Sediment samples were collected semiannually to assess
the impact of contaminant deposition and adsorption. Additional
constituents such as mercury, selenium, DDT, PCBs and radioactivity
were also evaluated on a semiannual basis to address public concerns
regarding the pollution threat from these constituents.
In order to bring the existing program in full compliance with new
federal NPDES regulations, field screening to detect gross
contamination was added to the program. The number of sampling sites
in the channels and receiving waters were also increased in order to
better assess the amount and type of contamination in storm water and
urban runoff.
In addition, it is proposed that the program assess the impact of
selected, permitted NPDES discharges including the runoff from
nurseries in he San Diego Creek watershed. Information gathered
during the life of the permit will be used in developing future
monitoring programs.
11.4 PROGRAM IMPLEMENTATION
The monitoring program for storm channels and receiving waters
consists of field screening (channels only); dry -weather,
flow -composite, sampling; and storm sampling.
Field screening will be used to detect gross contamination which may
be indicative of illegal disposal of pollutants. Monitoring
locations were sited on channels which have drainage areas greater
than one square mile or which have industrial (manufacturing) land
uses in the drainage areas. Reports exhibiting elevated
concentrations of field -screening -constituents will be referred to
the EMA Water Pollution Section for further investigation.
Data from dry -weather and storm sampling will be used to estimate the
total annual volume of contaminants discharged by each monitored
channel. These monitoring locations will be in channels which are
identified in the permits as "Waters of the State", or will be in
major tributaries to "Waters of the State".
Monitoring locations include 90 field screening stations, 34 channel
sampling stations, and 20 sampling stations within the harbors and
bays throughout the County.
Storm monitoring of channels will also be used to evaluate the level
of contamination during and after storm events. Samples will be
analyzed from the first 4 hours of the storm (first flush), the next
20 hours, and from two consecutive 36 hour periods (after the first
day). These data will be used to compute four-day average,
contaminant concentrations.
09 -Dec -1991 11-2
The receiving water monitoring program includes stations in the
Huntington Harbor; Sunset, Anaheim, and Bolsa Bays; Upper and Lower
Newport Bays; and Dana Point Harbor. These stations will also be
monitored during and subsequent to storms for the same contaminants
as in the channel monioring program.
In the channel and receiving water monitoring programs semiannual
sampling of bed sediment will also be conducted to determine the
chronic effects of storm water runoff.
NJ:ltPWF02-047
09 -Dec -1991 1110619590730 11-3
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APPENDIX 1
DAMP IMPLEMENTATION AND REPORTING SCHEDULE
REFERENCE SECTION 2.2.4
SCHEDULE
The tasks included in this Plan will be accomplished in accordance with the
following schedule.
RECONNAISSANCE SURVEY
Progress
Report
January
31,
1992
Progress
Report
January
31,
1993
Progress
Report
January
31,
1994
PLAN FOR PROSECUTING ILLEGAL DISCHARGES
July 31,
1991
Fiscal Report
Plan
1992
January
31,
1992
Progress
Report
January
31,
1993
Progress
Report
January
31,
1994
DRAINAGE AREA MANAGEMENT PLAN
Progress
Report
August
31,
1992
Progress
Report
August
31,
1993
Progress
Report
August
31,
1994
STORMWATER SYSTEM MONITORING PROGRAM
Progress
Report
November 30, 1991
Progress
Report
November 30, 1992
Progress
Report
November 30, 1993
Progress
Report
November 30, 1994
RECEIVING WATER MONITORING PROGRAM
Progress Report
November
30, 1991
Progress Report
November
30, 1992
Progress Report
November
30, 1993
Progress Report
November
30, 1994
ANNUAL FISCAL ANALYSIS
Fiscal Report
July 31,
1991
Fiscal Report
July 31,
1992
Fiscal Report
July 31,
1993
Fiscal Report
July 31,
1994
DATA/PROGRAM ANALYSIS
Data Report
January
31, 1991
Data Report
January
31, 1992
Data Report
January
31, 1993
Data Report
January
31, 1994
NJ:ltPWF02-047
09 -Dec -1991 1111815444110
GLOSSARY
TECHNICAL TERMS, ABBREVIATIONS, ACRONYMS
RELATED TO
STORMWATER POLLUTION
Ad valorem tax revenue
Tax dollars raised by the imposition of a tax based on the assessed valuation of
property.
Agricultural Best Management Practices (AgBMP)
See Best Management Practices
Best Management Practices (BMPs)
Schedules of activities, prohibitions of practices, maintenance procedures, and
other management practices to prevent or reduce the pollution of "waters of the
United States." BMPs also include treatment requirements, operating procedures,
and practices to control plant site runoff, spillage or leaks, sludge or waste
disposal, or drainage from raw material storage. As used in the Drainage Area
Management Plan, BMPs are classified as follows:
1. Nonstructural BMPs
Administrative, operational, educational, and similar practices not
requiring existing or new structures. Also called Procedural BMPs.
2. Routine structural BMPs
Structural BMPs of proven effectiveness that may function either to minimize
the introduction of pollutants into the drainage system or to remove
pollutants from the drainage system. These BMPs may be included in Standard
Plans issued by public agencies.
3. Special structural BMPs
Engineered facilities designed to address specific pollutant problems in a
watershed. Special structural BMPs are anticipated to require major capital
investments, engineered design on a case-by-case basis, and a commitment for
long-term operation and maintenance. When constructed to address pollutant
problems over a large watershed or group of watersheds, called a System -Wide
BMP.
4. Agricultural BMPs
Farming practices such as contouring plowing, fertilizer and irrigation
control, and crop selection designed to minimize erosion and runoff.
Community Avareness Program (CAP)
A nonstructural BMP designed to educate the public about nonpoint pollution.
Catch Basins
See also Stormwater Inlet. An older
may be mistaken for other stormwater
chamber intended to retain the heavy
be carried into the storm drain. The
substantial maintenance operation and
style, specialized stormwater inlet which
inlets. A catch basin is a form of grit
debris in stormwater which otherwise would
periodic cleaning of catch basins is a
in the intervals between storms the
09 -Dec -1991 G-1
retained water may cause odor and mosquito nuisances. It now is considered
generally that the disadvantages of catch basins outweigh their benefits (ASCE
Manuals and Reports on Engineering Practice No. 37).
Co -permittee
A permittee to a NPDES permit that is only responsible for permit conditions
relating to the discharge for which it is operator. As used in the Stormwater
Permit Implementation Agreement, co -permittees are the County of Orange, its
incorporated Cities, and the Orange County Flood Control District.
Code of Federal Regulations (CFR)
A compilation of all Federal regulations implementing the various Federal acts.
Drainage Area Management Plan (DAMP)
A document required by the Drainage Area Management Program in the municipal
stormwater permits issued by the San Diego and Santa Ana Regional Water Quality
Control Boards.
EPA - Environmental Protection Agency
Federal agency responsible for enforcing the requirements of the Clean dater Act
and NPDES regulations. For California, this authority has been delegated to the
State Water Resources Control Board.
Ephemeral flows, ephemeral streams
Flows of stormwater that are truly seasonal, with stormwater flowing only during
the wettest months of the year.
Federal Register
A daily publication of the U.S. Government that provides a uniform system for
making available to the public regulations and legal notices issued by Federal
Agencies.
Green Book
See Standard Specifications for Public Works Construction.
Hazmat Disclosure Requirements
The requirement for persons or companies having hazardous materials.to notify a
fire department or other agency.
HMPO - Hazardous Material Program Office
Part of -the Orange County Fire Department responsible for hazardous materials
safety and household hazardous waste collection program.
Illicit Discharge
Any discharge to a municipal separate storm sewer that is not composed entirely
of storm water, except discharges pursuant to a National Discharge Elimination
System (NPDES) permit.
Industrial Discharger Identification Program ,
A program mandated by 40 CFR 122.26(a)(4) whereby industrial stormwater
dischargers are required to notify owners of municipal separate storm drain
systems.
09 -Dec -1991 G-2
Integrated Waste Management Department
A functional division of the County of Orange responsible for solid waste
collection and disposal, sanitary landfill operation, recycling, materials
recovery, and hazardous waste.
MEP
Maximum extent practicable (treatment standards for municipal separate storm
sewer point sources). Maximum extent practicable (MEP) means to the maximum
extent possible, taking into account equitable considerations of synergistic,
additive, and competing factors, including but not limited to, gravity of the
problem, fiscal feasibility, public health risks, societal concern, and social
benefits.
Municipal Separate Storm Sever
Conveyance or system of conveyances (including public conveyances and public
roads with drainage systems) that is owned or operated by a city, town, borough,
county, parish, district, association, or other public body created by or
pursuant to State law and having jurisdiction over disposal of sewage,
industrial wastes, or other wastes, or an Indian tribe or an authorized Indian
tribal organization, or a designated and approved management agency under
Section 208 of the Clean Water Act (CWA) that discharges to waters of the United
States and that is designed solely for collecting or conveying storm water that,
is not part of a publicly owned treatment works (POTW) as defined by 40 CFR
122.2.
Nonpoint source of pollution
Pollution source that is diffuse, from many locations, and cannot be traced to
any single point of discharge. Fertilizer washing off an over -watered lawn is a
nonpoint pollutant.
National Pollutant Discharge Elimination System (NPDES)
The national program for controlling discharges from point source discharges
directly into waters of the U.S. under the Clean Water Act.
NPDES Technical Advisory Committee
A six -member committee established by the co -permittees in the Stormwater Permit
Implementation Agreement to more efficiently handle technical and administrative
details of the NPDES program.
OCEMA - Orange County Environmental Management Agency
A functional division of the County of Orange. The Regulation and Public Works
functions have been assigned the NPDES tasks for the County of Orange.
Standard Industrial Classification (SIC)
A method used by the Office of Management and Budget to classify industries
according to type and method of production. Each industry is assigned a 4 -digit
code. The major industrial categories are indicated by the first two digits.
Special structural BMPs
See Best Management Practices
09 -Dec -1991 G-3
Standard Conditions of Approval
Condition of approval of development adopted and issued by County or City
planning authorities.
Standard Plans
Engineering Plans adopted and issued by the Orange County Environmental
Management Agency, the incorporated Cities, and other public agencies. Standard
Plans are also issued by the American Public Works Association (APWA). The
users of standard plans should be aware that the APWA Standard Plans are
unsigned. Where Standard Plans (either public agency or APWA) have been
approved by a public agency, the agency's approval is an approval that the .
adopted standard plan is suitable for general public agency use. The project
proponent, by including the standard plans (by reference or reproduction) in
project plans, assumes a professional engineer's responsibility for their use.
Standard Specifications for Public Vorks Construction
The "Green Book." A book adopted by OCEMA, Orange County Cities, and other
public agencies. The Standard Specifications represents the best professional
thinking of the leading public works officials as well as contractor, vendor and
utility members of the construction industry and was written to answer a need
for uniform specifications governing public works construction performed for the
many cities, counties and public agencies in the Southern California area.
(APWA).
State Vater Resources Control Board
State agency which has the authority to enforce EPA regulations within the
state.
Stormwater Inlet or Storm Drain Inlet
Stormwater inlets admit surface waters to the underground conduits and comprise
an important part of the storm drainage system. Their location and design
should, therefore, be given careful consideration.
Inlets can be classified into three major groups, each having several varieties
which may be set either depressed or flush with the pavement surface.
1. Curb Inlets
Curb inlets have a vertical opening in the curb piece through which the
gutter flow passes. This type of inlet offers little or no obstruction to
the even flow of traffic since the tops of these deflectors lie in the plane
of the pavement.
2. Gutter Inlets
A horizontal opening in the gutter covered by one or more grates through
which the gutter flow passes is called a gutter inlet.
3. Combination Inlets
A curb and a gutter inlet acting as a unit is known as a combination inlet.
Usually a gutter inlet is placed directly in front of a curb inlet, but it
may be displaced in an overlapping or end-to-end position either upstream or
downstream. A multiple inlet is made up of two contiguous or closely spaced
inlets acting as a unit.
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Engineering judgment must be used to evaluate the relative importance of
clogging, nuisance to traffic, convenience, safety, and cost, for which
hydraulic considerations sometimes may have to be sacrificed (ASCE Manuals and
Reports on Engineering Practice No. 37).
Storm Drain
Pipe or channel structure designed to convey only stormwater runoff for purposes
of flood protection. Federal regulations use the term "Storm Sewer". Use of
the word "sewer" for a stormwater conveyance structure should be discouraged,
since the word "sewer" also includes sanitary sewers and combined sewers which
carry human wastes.
Storm Water or Stormwater
Storm water runoff, snow melt runoff, and surface runoff and drainage.
Structural and procedural BMPs
See Best Management Practices.
System -wide BMPs
See Best Management Practices.
TAC - Technical Advisory Committee
See NPDES Technical Advisory Committee.
Waters of the United States or Waters of the U.S.
(a) All waters which are currently used, were used in the past, or may be
susceptible to use in interstate or foreign commerce, including all waters
which are subject to the ebb and flow of the tide;
(b) All interstate waters, including interstate "wetlands";
(c) All other waters such as intrastate lakes, rivers, streams (including
intermittent streams), mudflats, sandflats, "wetlands," sloughs, prairie
potholes, wet meadows, playa lakes, or natural ponds the use, degradation,
or destruction of which would affect interstate or foreign commerce,
including any such waters:
(1) Which are or could be used by interstate or -foreign travelers for
recreational or other purposes;
(2) From which fish or shellfish are or could be taken and sold in
interstate or foreign commerce; or
(3) Which are used or -could be used for industrial purposes by industries
. in interstate commerce;
(d) All impoundments of waters otherwise defined as waters of the United States
under this definition;
(e) Tributaries of waters identified in paragraphs (a) through (f) of this
definition;
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(f) The territorial sea; and
(g) "Wetlands" adjacent to waters (other than waters that are themselves
wetlands) identified in paragraphs (a) through (f) of this definition.
Waste treatment systems, including treatment ponds or lagoons designed to meet
the requirements of the Clean Water Act (other than cooling ponds as defined in
40 CFR 423.11(m) which also meet the criteria of this definition) are not waters
of the United States.
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