HomeMy WebLinkAbout2019-08-27; City Council; ; Authorizing the Legally Responsible Official to re-certify the Sewer System Management Plan and submit to the State Water Resources Control Board~ CITY COUNCIL
~ Staff Report
Meeting Date:
To:
From:
Staff Contact:
Aug. 27,2019
Mayor and City Council
Scott Chadwick, City Manager
Stephanie Harrison, Utilities Asset Manager
stephanie.harrison@carlsbadca.gov or 760-603-7338
Vicki Quiram, Utilities Director
vicki.quiram@carlsbadca.gov or 760-438-2722
CA Review ~ L&
Subject: Authorizing the Legally Responsible Official to re-certify the Sewer System
Management Plan and submit to the State Water Resources Control Board
Recommended Action
Adopt a Resolution authorizing the Legally Responsible Official (LRO) to re-certify the Sewer
System Management Plan (SSMP) and submit to the State Water Resources Control Board
(SWRCB).
Executive Summary
The purpose of the SSMP is to protect public health and safety, and the environment. The SSMP
is a document that the city submits to the SWRCB with its plan to manage, operate and
maintain all portions of the city's wastewater collection system in a manner that meets all state
and federal regulations, minimizes sanitary sewer overflows, provides adequate capacity to
convey wastewater flows, cost effectively manages infiltration and inflow (1/1) and minimizes
the impacts of wastewater discharge into the environment. The 2019 SSMP is in full compliance
with SWRCB's Waste Discharge Requirements (State Board WDRs) for sanitary sewer systems.
Revisions to the SSMP were recently completed and several elements were updated. Section
D.14 of Order No. 2006-0003-DWQ (Order), the Statewide General Waste Discharge
Requirements for Sanitary Sewer Systems, requires the City Council, as the governing board of
the city's wastewater division, to approve the updated SSMP and to authorize staff to re-certify
and submit the SSMP to the SWRCB.
Discussion
On May 2, 2006, the SWRCB promulgated the Order to comply with Section 13267 of the
California Water Code. All public agencies that own or operate sanitary sewer systems greater
than one mile in length or which collect and/or convey wastewater to a publicly-owned
treatment works, are required to comply with the Order.
The Order required that the city develop an SSMP and make it available to the public, to the
SWRCB and the San Diego Regional Water Quality Control Board (Regional Board). On July 21,
August 27, 2019 Item #2 Page 1 of 63
2009, City Council adopted Resolution No. 2009-192, approving the city's first SSMP. The Order
further required that the SSMP be audited at least every two years, and re-certified by the
governing board at least every five years from adoption. On Nov. 21, 2014, City Council adopted
Resolution No. 2014-251, approving the first update to the city's SSMP.
The Order requires the city to request City Council approval when there are significant changes
to the plan. The SSMP was updated to be more specific and reflect the significant program
improvements that have been implemented by the wastewater division over the last five years.
The wastewater division has implemented progressive asset man_agement programs, utilizes
performance management with metrics that inform operations, collects data using mobile
devices and performs analyses to identify issues and make improvements, has a comprehensive
sewer cleaning and condition inspection program, and recently updated its sewer master plan.
The SSMP continues these efforts and moves the utility forward for continuous improvement. A
summary of the revisions to the SSMP is attached as Exhibit 3. The revised SSMP is included to
Attachment A to the Resolution.
Based on analysis of the sanitary sewer overflow (SSO} trends between Jan. 1, 2016 through
Dec. 31, 2019 and the results of the SSMP audit, the city's overall program for managing the
sewer systems is very effective and continues to operate at a high level of performance.
The updated SSMP is ready for approval and submission to the state. The SWRCB Order
requires that all reports be certified and submitted electronically by either a principal executive
officer, a ranking elected official, or a duly authorized representative of the city that has
responsibility for the overall operation of the regulated activity, the LRO. On October 21, 2014,
City Council adopted Resolution 2014-251, which authorized the Utilities Director and Utilities
Manager to serve as LROs for the City of Carlsbad.
Staff recommends that City Council approve the SSMP and authorize the previously designated
LROs to re-certify the SSMP and submit to the SWRCB.
Fiscal Analysis
Preparation and implementation activities for the SSMP are funded in the wastewater
operating budget. There are no additional fiscal impacts associated with the SSMP updates and
audit.
Next Steps
After City Council approval and authorization, the SSMP will be re-certified and submitted to
. the SWRCB and posted on the city's website.
Environmental Evaluation (CEQA)
The proposed action qualifies as a Class 1 Categorical Exemption pursuant to Section 15301(b}
of the California Environmental Quality Act (CEQA} Guidelines. This exemption applies to the
operation, repair, maintenance, or minor alteration of existing public or private structures,
facilities, and the mechanical equipment involving negligible or no expansion of use beyond
that existing at the time of the lead agency's determination. Section b lists existing facilities that
August 27, 2019 Item #2 Page 2 of 63
are publicly-owned that are used to provide sewer services as being exempt from
environmental review.
Public Notification and Outreach
This item was noticed in accordance with the Ralph M. Brown Act and was available for public
viewing and review at least 72 hours prior to the scheduled meeting date. Copies of the SSMP
are available in the City Clerk's office.
Exhibits
1. City Council Resolution.
2. Prior City Council Actions.
3. Summary of Revisions to the SSMP.
August 27, 2019 Item #2 Page 3 of 63
RESOLUTION NO.
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF CARLSBAD,
CALIFORNIA, AUTHORIZING THE LEGALLY RESPONSIBLE OFFICIAL (LRO) TO
RE-CERTIFY THE SEWER SYSTEM MANAGEMENT PLAN (SSMP) AND SUBMIT
TO THE STATE WATER RESOURCES CONTROL BOARD (SWRCB)
EXHIBIT 1
WHEREAS, the City Council of the City of Carlsbad, California has determined it necessary,
desirable and in the public interest to update the SSMP; and
WHEREAS, on May 6, 2006, the SWRCB adopted a permit called Order No. 2006-0003 -
Statewide General Waste Discharge Requirement for Sanitary Sewer Systems (Statewide WDR), which
requires public agencies that own or operate sanitary sewer systems to comply with the permit; and
WHEREAS, on Nov. 6, 2007, City Council adopted Resolution No. 2007-282, approving the
Development Plan and Schedule for the SSMP; and
WHEREAS, on Sept. 9, 2013, the SWRCB adopted Order No. WQ2013-0058-EXEC -amending
Monitoring and Reporting Program for Statewide General Waste Discharge Requirement for Sanitary
Sewer Systems; and
WHEREAS, on July 21, 2009, City Council adopted Resolution No. 2009-192, approving updates
to the SSMP and authorizing staff to certify the city's Program to Implement the SSMP and to submit
the report to the SWRCB; and
WHEREAS, staff has recently reviewed, updated and audited the city's SSMP.
NOW, THEREFORE, BE IT RESOLVED by the City Council of the City of Carlsbad, California, as
follows:
1.That the above recitations are true and correct.
2.That the City Council approves the updated SSMP (Attachment A).
3.That the City Council authorizes the Utilities Director and Utilities Manager, serving as
the Legally Responsible Official (LRO), to certify the city's program, implement the SSMP and submit
applicable reports to the SWRCB.
August 27, 2019 Item #2 Page 4 of 63
EXHIBIT 1
PASSED, APPROVED AND ADOPTED at a Regular Meeting of the City Council of the City of
Carlsbad on the_ day of ___ ~ 2019, by the following vote, to wit:
AYES:
NAYS:
ABSENT:
MATT HALL, Mayor
BARBARA ENGLESON, City Clerk
(SEAL)
August 27, 2019 Item #2 Page 5 of 63
1-)~
City of Carlsbad
Sewer System
Management Plan
2019 SSMP Update
Carlsbad, CA
July 10, 2019
Attachment A
August 27, 2019 Item #2 Page 6 of 63
Sewer System Management Plan ~
2019 SSMP Update 'VJl/
Contents
1 Goal and Overview .............................................................................................................................. 1
1.1 Goal ........................................................................................................................................... 1
1.2 SSMP Overview ..................................................................................................................... : .. 1
1.3 System Overview ...................................................................................................................... 2
1.4 Regulatory Context .................................................................................................................... 2
1.4.1 Summary of State Board WDRs .................................................................................. 3
1.4.2 Summary of Regional Board WDRs ............................................................................. 3
1.5 Application for Coverage Under the State Board WDRs .......................................................... 4
2 Organization ........................................................................................................................................ 5
2.1 Overview .................................................................................................................................... 5
2.2 Authorized Representative ........................................................................................................ 5
2.3 Positions Responsible for Implementing SSMP Program ......................................................... 6
2.4 Chain of Communication for Reporting SSOs ........................................................................... 7
3 Legal Authorities .................................................................................................................................. 9
3.1 Municipal Code .......................................................................................................................... 9
3.1.1 Authority to Prevent I Ilic it Discharges ......................................................................... 10
3.1.2 Authority to Ensure Access for Maintenance, Inspection or Repairs for
Portions of Lateral Owned or Maintained by the City ................................................. 11
3.1 .3 Authority to Limit Discharge of Fats, Oils and Grease or Other Debris ..................... 11
3.2 Authority to Require Proper Design and Construction of Sewers and Connections ............... 11
4 Operations and Maintenance Program ..................................................................................... : ....... 12
4.1 Sanitary Sewer System Mapping ............................................................................................ 12
4.2 Preventive Maintenance Program ........................................................................................... 12
4.2.1 Preventive Maintenance Program .............................................................................. 12
4.2 .2 Information Management ........................................................................................... 16
4.3 Rehabilitation and Replacement Planning .............................................................................. 16
4.3.1 Risk-Based Prioritization ............................................................................................ 16
4.3.2 Condition Assessment and Remediation Decision-Making ....................................... 17
4.3.3 Capital Improvement Plan .......................................................................................... 17
4.4 Training Program ..................................................................................................................... 17
4.5 Equipment and Replacement Part Inventories ........................................................................ 18
5 Design and Performance Provisions ................................................................................................. 19
5.1 Design and Construction Standards and Specifications ......................................................... 19
5.1.1 Standards for Gravity Sewers .................................................................................... 19
5.1 .2 General Guidelines for Sewer Force Mains ............................................................... 19
5.1.3 General Guidelines for Sewer Lift Stations ................................................................ 20
5.1.4 Standard Drawings ..................................................................................................... 20
5.2 Procedures and Standards for Inspection and Testing ........................................................... 20
6 Overflow Emergency Response Plan ............................................................................................... 22
6.1 Summary of the Overflow Emergency Response Plan Sections ............................................ 22
6.2 Contractor Spill Prevention and Emergency Response Plans ................................................ 25
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Sewer System Management Plan
2019 SSMP Update
7 Fats, Oils, and Grease Control Program ........................................................................................... 26
7 .1 Public Education Outreach Program ....................................................................................... 26
7.2 Acceptable Disposal Locations ............................................................................................... 26
7.3 FOG Legal Authorities ............................................................................................................. 26
7.3.1 Authority to Prohibit FOG Discharges ........................................................................ 27
7.3.2 Authority to Inspect Grease Producing Facilities ....................................................... 27
7.3.3 Enforcement Authorities ............................................................................................. 27
7.4 FOG Program Requirements .................................................................................................. 28
7.4.1 Best Management Practice, Record-Keeping and Reporting Requirements ............. 28
7.4.2 Grease Control Device Requirements ....................................................................... 28
7.5 Preventive Maintenance Program to Address FOG Accumulation ......................................... 28
7 .6 Source Control Measures for All Sources of FOG Discharged ............................................... 29
7.7 FOG Program Staffing ............................................................................................................. 29
8 System Evaluation and Capacity Assurance Plan ............................................................................ 30
8.1 Evaluation to Identify Potential Hydraulic Deficiencies ................................................ : .......... 30
8.2 Design Criteria ......................................................................................................................... 31
8.3 Capacity Enhancement Measures .......................................................................................... 31
8.4 Schedule for Completion of Capital Program .......................................................................... 31
9 Monitoring, Measurement, and Program Modifications .................................................................... 33
9.1 Collection and Management of Relevant Data ....................................................................... 33
9.2 Active Performance Management of SSMP Program Effectiveness ...................................... 34
9.3 Assessment of Preventive Maintenance Program Success and SSO Trends ....................... 35
9.4 Program Updates Driven by Performance Monitoring ............................................................ 36
10 SSMP Program Audit and SSMP Updates ....................................................................................... 37
10.1.1 SSMP Program Audit Process ................................................................................... 37
10.1.2 Audit Implementation and Tracking of Results .......................................................... 37
10.2 SSMP Update Process ............................................................................................................ 38
11 Communication Plan ......................................................................................................................... 39
11.1 Communication with the Public ............................................................................................... 39
11 .2 Communication with Tributary or Satellite Systems ................................................................ 39
Tables
Table 1-1 : Summary of State Board WDRs and Monitoring and Reporting Program Requirements ........... 3
Table 3-1: Summary of Legal Authorities ...................................................................................................... 9
Table 6-1: Linkage between Overflow Response Requirements and Overflow Emergency
Response Plan ............................................................................................................................... 22
Table 7-1 : Summary of FOG Source Control and Enforcement Legal Authorities ..................................... 26
Table 9-1: Information Systems Used to Collect, Store and Analyze Relevant SSMP Program
Data ................................................................................................................................................ 34
Table 9-2: Multi-Layered Performance Management Framework .............................................................. 35
Table 10-1: SSMP Audit and Update Schedule .......................................................................................... 37
ii I July 10, 2019
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Figures
Sewer System Management Plan
201 9 SSMP Update
Figure 2-1 : SSMP Program Implementation Organization Chart .................................................................. 6
Ell
A1
A2
A3
C
E
F2
H
Attachments
Attachment Title
State Board's Order No. 2006-003, Statewide General Waste Discharge Requirements for Sanitary
Sewer Systems
State Of California Water Resources Control Board, Order No. WQ 2013-0058-EXEC, Amending
Monitoring And Reporting Program for Statewide General Waste Discharge Requirements for Sanitary
Sewer Systems
California Regional Water Quality Control Board, Region 9, Order R9-2007-0005 entitled Waste
Discharge Requirements for Sewage Collection Agencies in the San Diego Region
SSO Response, Notification and Reporting Workflow
Reserved
Reserved
Overflow Emergency Response Plan ----
Example Spill Prevention and Emergency Response Plan
Reserved
Reserved
J SSMP Program Audit Report, April 2019
July 10, 201 9 I iii
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Sewer System Management Plan
2019 SSMP Update
Acronym or Abbreviation
BMP
BOD
CCTV
CIP
CIPP
.CIPP
City
CIWQS
CM
DnMH
EWA
FOG
GBMP
GCD
GCDI
GIS
HOA
LRO
MAM
Muni Code
NASSCO
PACP ----~--~
PM
R9
·scADA
SSMP
sso
Table of Acronyms and Abbreviations
Best Management Practice
Closed-circuit television
Capital improvement program
Cured-in-place pipe
City of Carlsbad
Corrective maintenance
Encina Wastewater Authority
Definition
Grease best management practices
Grease control device
Grease control device inspection
Homeowner's Association
Member Agency Meeting
National Association of Sewer Service Companies
Preventive maintenance
San Diego Regional Water Quality Control Board
Supervisory Control and Data Acquisition
Sanitary sewer overflow
State Board State Water Resources Control Board .. ---~---~-~--'""·~-"---------------~----
State Board WDRs State Water Resources Control Board Waste Discharge
Requirements
SWRCB
UpMH
WDID
WDRs
iv I July10,2019
State Water Resources Control Board -------~-~--
Upstream manhole
Waste Discharge Requirements
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2019 SSMP Update
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Sewer System Management Plan Q._., ..
2019 SSMP Update 'fif/ff:I
1 Goal and Overview
1.1 Goal
The goal of this Sewer System Management Plan (SSMP) is to provide a plan and
schedule to properly manage, operate, and maintain all parts of the City of Carlsbad's
sewer system. The overall goal of the City's SSMP program implementation is to prevent
and minimize sewer overflows and mitigate SSOs that do occur. Specific goals of our
SSMP program implementation are as follows:
• Protect public health and safety, and the environment
• Properly manage, operate and maintain all portions of the City's wastewater
collection system to minimize SSOs
• Provide adequate capacity to convey peak wastewater flows associated with the
City's design storm event
• Cost effectively manage infiltration/inflow (1/1)
• Involve employees involved in collection system program implementation in the
strategic planning process for the collection system
• Perform all operation and maintenance activities in a safe manner
1.2 SSMP Overview
This SSMP is in full compliance with the State Water Resources Control Board's Waste
Discharge Requirements (State Board WDRs)1 for sanitary sewer systems and meets
the following objectives:
a) Properly fund, manage, operate and maintain, with adequately trained staffs
and/or contractors possessing adequate knowledge, skills, and abilities, all parts
of the collection system owned and/or operated by the City.
b) Provide adequate capacity to convey base flows and peak flows, including flows
during wetweather events, to the minimum design criteria as defined in the City's
System Evaluation and Capacity Assurance Plan (a required component of the
SSMP), for all parts of the collection system owned and/or operated by the City.
c) Take all feasible steps to stop and mitigate the impact of SSOs in the collection
system owned and/or operated by the City.
The City achieves these objectives by implementing a comprehensive sewer
infrastructure asset management program that is documented in the following 11 SSMP
elements:
1. Goal and Overview
1 This refers to State Board's Order No. 2006-003, Statewide General Waste Discharge Requirements for
Sanitary Sewer Systems. ·
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2019 SSMP Update
2. Organization
3. Legal Authority
4. Operation and Maintenance Program
5. Design and Performance Provisions
6. Overflow Emergency Response Plan
7. FOG Control Program
8. System Evaluation and Capacity Assurance Plan
9. Monitoring, Measurement, and Program Modifications
10. SSMP Program Audits
11. Communication Program
This SSMP integrates documentation of numerous collection system management
programs into one formal document. These programs are described in greater detail in a
variety of documents, which are referenced in this SSMP when appropriate.
1.3 System Overview
The City of Carlsbad sanitary sewer system consists of:
• 265 miles of gravity mains
• 3.9 miles of force mains
• 11 sewer lift stations
Carlsbad is located in North County, San Diego County. The City is 87 miles south of Los
Angeles and 35 miles north of downtown San Diego and is part of the San Diego-
Carlsbad, CA Metropolitan Statistical Area. It is a tourist destination referred to as "The
Village by the Sea" by locals. The City contains three (3) lagoons, one (1) lake and
borders over 3 miles of Pacific Ocean coastline.
1.4 Regulatory Context
The City is required to comply with the State Board WDRs adopted May 2, 2006. The
Order, and associated Monitoring and Reporting Program (MRP) requirements are
included as Attachment A1 (Order) and Attachment A2 (MRP) and additional
information can be found at:
https://www.waterboards.ca.gov/water issues/programs/sso.
The City is also required to comply with California Regional Water Quality Control Board,
Region 9, Order R9-2007-0005 entitled Waste Discharge Requirements for Sewage
Collection Agencies in the San Diego Region (Regional Board WDRs). The Regional
Board WDRs are included as Attachment A3. Additional information regarding the
Region 9 Regional Board WDRs can be found at:
.https://www.waterboards.ca.gov/sandieqo/publications forms/general orders.html.
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1.4.1
Sewer System Management Plan ~-_·-
2019 SSMP Update 'IJJfftl
Summary of State Board WDRs
Table 1-1 summarizes the State Board WDRs and associated monitoring and reporting
requirements under which the collection system operates and that are addressed by this
SSMP2. All agencies that own and operate collection systems greater than one mile in
length must comply with these requirements. In addition, Section C of the State Board
WDRs prohibits sanitary sewer overflows (SSOs) to waters of the United States and
SSOs that cause a nuisance per the California Water Code Section 13050(m).
Table 1-1: Summary of State Board WDRs and Monitoring and Reporting Program
Requirements
1.4.2
Provisions
D.3-5, 7
D.8-9
D.10
D.11 , 13-14
D.12
Monitoring and
Reporting
Requirements
Description
SSO prevention, response, and
' control
System operations and
maintenance, adequate resource
allocation, appropriate training,
knowledge, and abilities
Aaequate capacity for base,
1?.eak, and wet weather flows
SSMP requirement, content,
update and certification
Use of qualified professionals for
engineering and geological
evaluations and judgments
SSO reporting and notification;
water quality monitoring; phange
log
Summary of Regional Board.WDRs
Applies to
Element 4, Operation and Maintenance
Program;
Element 6, Overflow Emergency
Response Plan; Element 7, FOG Control
Program; Element 8, System Evaluation
and Q.aP.acity Assurance Pla_n
Element 4, Operation and Maintenance
Program
All Elements of SSMP
Element 5, Design and Performance
Provisions
Element 6, Overflow Emergency
Response Plan; Water Quality Monitoring
Plan; SSMP Revision Log
On February 14, 2007, the San Diego Regional Water Quality Control Board issued the
Regional Board WDRs, which include additional requirements more stringent than the
State Board WDRs. The Regional Board WDRs reaffirms the prohibition of all SSOs
upstream of a sewage treatment plant. The Regional Board WDRs also references the
Water Quality Control Plan (Basin Plan), adopted by the Regional Board, which
designates beneficial uses, narrative, and numerical water quality objectives, and
prohibitions which are applicable to the discharges prohibited in the Regional Board
WDRs. The Regional Board WDRs also requires notification and reporting of Private
Lateral Sewage Discharges.
2 Summarized from the SWRCB Order No. 2006-0003-DWQ Statewide General Waste Discharge
Requirements for Sanitary Sewer Systems, Section D
"Provisions".https://www.waterboards.ca.gov/board_decisions/adopted_orders/water_quality/2006/wqo/
wqo2006_0003.pdf
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Sewer System Management Plan
2019 SSMP Update
1.5 Application for Coverage Under the State Board WDRs
The City applied for coverage under the general Waste Discharge Requirements (WDRs)
in 2006 for one collection system and was assigned a Wastewater Discharger
Identification Number (WDID) of 9S$O11209 in the California Integrated Water Quality
System (CIWQS).
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_Sewer System Management Plan
2019 SSMP Update
2 Organ ization
2.1 Overview
The City of Carlsbad is a charter city operating with a "Council-Manager" system. The
City Council sets policy guidelines for the city and those guidelines are carried out under
the supervision of the City Manager. The sanitary sewer system is managed by the
Wastewater Manager in the Utilities section of the Public Works Department.
2 .2 Authorized Representative
The City has designated a primary Legally Responsible Official (LRO) pursuant to
Section J., REPORT DECLARATION, of the State General Waste Discharge
Requirements (Order No. 2006-0003).
Primary LRO
Mr. Don B. Wasko, Wastewater Manager
5950 El Camino Real
Carlsbad, CA 92028
(760) 438-2722
Don.Wasko@carlsbadca.gov
Secondary LRO
Mr. Jesse Castaneda, Operations Supervisor
5950 El Camino Real
Carlsbad, CA 92028
(760) 438-2722
Jesse.Castaneda@carlsbadca.gov
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2019 SSMP Update
2 .3 Positions Responsible for Implementing SSMP
Program
Figure 2-1 is an organization chart showing the lines of authority for key positions
responsible for implementing various elements of the SSMP program.
Figure 2-1: SSMP Program Implementation Organization Chart
Finance
lnfonnation
Technology
Denotes SSO
Reporting
Responsibility
Management Analyst
City Council
City Manager
Chief Operations Officer
Utilities Manager
Primary LRO
Operations Supervisor
Secondary LRO
Wastewater
Oper~tors
Utility Workers
Utilities Asset Manager
·-Planner/Scheduler
Data Submitter
SSMP Program Implementation
Organization Chart
6/29/2019
A summary for key positions, including the personnel responsible for responding to and
reporting SSOs, is presented below.
• City Council -responsible for approval of funding requests and the Sewer System
Management Plan.
• City Manager -responsible for establishing and communicating high level policy
relating to the outcomes of the SSMP.
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2019 SSMP Update
• Chief Operations Officer -responsible for direct oversight of operating departments
responsible for SSMP development and implementation.
• Public Works Director -work as liaison between Carlsbad senior management and
Utilities.
• Utilities Director -responsible for establishing and communicating high level policy
relating to the outcomes of the SSMP.
• Utilities Manager -responsible for the development and implementation of the
SSMP as well as planning, organizing and directing the activities of the work units
through the Superintendents and Supervisors.
• Operations Supervisor-notifies the Sanitation System Operator 1-111, Utility Worker
1-111 or Wastewater Duty Operator when alerted to a potential SSO. During working
hours, oversees reporting and notification of SSOs, manages field operations and
maintenance activities, provides relevant information to agency management,
prepares and implements contingency plans, leads emergency response,
investigates and reports SSO, and trains field crews.
• Wastewater Operator 1-111 and Utility Worker 1-111 (may also be the Wastewater
Duty Operator) -responsible for the day-to-day work activities to clean and maintain
the collections system. If after hours, notifies the Supervisor and Superintendent
when alerted to a potential SSO.
• Utilities Asset Manager-responsible for implementing assessment, evaluation,
decision-making and controls processes for asset monitoring, repair, rehabilitation
and replacement. Responsible for specifying mid-term and long-term asset
monitoring, repair, rehabilitation and replacement. Responsible for project
management for sewer system condition assessment and rehabilitation activities.
• Utilities Maintenance Planner/Scheduler -responsible for planning and
scheduling sewer system maintenance activities including sewer cleaning, closed
circuit television inspection, sewer repair and pump station maintenance.
Responsible for reviewing and modifying maintenance frequency and methods.
• Engineering Manager -responsible for managing the execution of the City's capital
improvement program including the development of design standards, specifications,
construction inspection and construction management ofsewer system capital
improvements.
• Management Analyst -has an understanding of the City's services, policies and
procedures, and in multiple areas of federal, state and local laws, codes and
regulations affecting multiple, complex areas. Knowledge of principles of
organization, administration, budgeting and human resources management.
2.4 Chain of Communication for Reporting SSOs
The chain of communication for reporting and notification of sanitary sewer overflows is
documented in detail in the Overflow Emergency Response Plan. A detailed workflow for
the sanitary sewer overflow response is provided as Attachment B. Key positions
described in the workflow include:
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2019 SSMP Update
Utilities Receptionist: The Utilities Receptionist receives complaint calls during Normal
Working Hours and forwards these calls to the Utilities Admin.
Utilities Admin: The Utilities Admin receives SSO complaints during Normal Working
Hours and contacts the Utilities Supervisor to determine the appropriate crew to dispatch
to investigate.
First Responder: The First Responder is the first crew dispatched to investigate the
SSO. Once the First Responder verifies an SSO is occurring, the First Responder
requests additional resources, if needed.
Spill Response Crew Lead: The Spill Response Crew Lead is the most senior collection
system maintenance crew member on-site at the spill event. The Spill Response Crew
Lead is responsible for leading spill response activities and documentation of the spill
event.
Police Department Dispatch: The Police Department Dispatch is responsible for
receiving customer complaints during After Hours and will contact the Construction
Maintenance Duty when notified of a spill during After Hours.
Construction Maintenance Duty: The Construction Maintenance Duty is responsible for
investigating spill complaints during After Hours and will request support from the
Collections Duty when an SSO is verified.
Collections Duty: The Collections Duty will respond to an SSO during After Hours when
requested by the Construction Maintenance Duty or Utilities Supervisor.
Wastewater Operations Crew: The Wastewater Operations Crew responds to pump
station alarms and pump station-related SmartCover alarms. The Wastewater
Operations Crew will notify the Wastewater Operations Lead when an alarm occurs.
Wastewater Operations Lead: The Wastewater Operations Lead notified the Utilities
Supervisor when a pump station alarm occurs.
Utilities Supervisor: The Utilities Supervisor designates the SSO response crew during
the day. The Utilities Supervisor is responsible for draft SSO reporting in CIWQS. The
Utilities Supervisor is responsible for SSO notifications to OES, Regional Board, and
other stakeholders. The Utilities Supervisor is designated as an Onsite Manager in
CIWQS and can certify SSO reports.
Utilities Manager: The Utilities Manager is responsible for certifying SSO reports in
CIWQS.
Normal Working Hours are 8:00 a.m. to 5:00 p.m. on Monday through Friday, except
holidays. After Hours are 5:00 p.m. to 8:00 a.m. on Monday through Friday as well as
weekends and holidays.
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3 Legal Authorities
Sewer System Management Plan
2019 SSMP Update
The City's legal authorities are primarily contained in the City's municipal code and the
City's engineering standards. Table 3-1 summarizes the source of the City's legal
authorities for each of the legal authorities required by the WDRs.
Table 3-1: Summary of Legal Authorities
Requirement Source of Authority
GENERAL
Prevent illicit discharges into the wastewater collection system
Limit the discharge of fats, oils, and grease and other debris Muni Code 13.04.050; 13.06.010
that may cause blockages
Require that sewers and connection be properly designed and Engineering Standards, Volume1 ,
constructed Chapter 6 -Design Criteria for Gravity
Sewer Line and Appurtenances
Require proper installation, testing, and inspection of new and Engineering Standards, Volume 3,
rehabilitated sewers Chapter 6 -Construction
Specifications
LATERALS
Clearly define City lateral responsibility and policies Muni Code 13.04.45
Ensure access for maintenance, inspection, or repairs for City does not own any portion of the
portions of the service lateral owned or maintained by the City laterals.
Control infiltration and inflow (1/1) from private service laterals Muni Code13.040.050
FOG SOURCE CONTROL
Installation of grease removal device (GRE)
Design standards for GRE
Maintenance and BMP requirements
Record keeping and reporting
Authority to inspect grease producing facilities
ENFORCEMENT
Enforce any violations of sewer ordinances
3.1 Municipal Code
Muni Code 13.06.040
Muni Code 13.06.090 (Interceptor)
Muni Code 13.06.100 (Trap)
Muni Code 13.06.100; 13.06.120; and
13.06.130
Muni Code 13.06.140
Muni Code 13.06.150; and 13.06.160
Muni Code 13.04.080
City of Carlsbad, Municipal Code, Chapter 13 (Sewers) provides the City with the
majority of the legal authorities required by the WDRs and can be found on the City's
webpage at:
http://www.carlsbadca.gov/cityhall/clerk/municipalcode/municipalcode.asp
This Municipal Code sets conditions and limitations on the use of the City's sewer
system and outlines provisions for enforcement for noncompliance with the City's
Municipal Code. The provisions of the Municipal Code apply to sewer construction, use,
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3.1.1
maintenance, discharge, deposit, or disposal of wastewater into and through the City's
collection systems and the issuance of fees, fines and penalties thereof. This Chapter of
the Municipal Code applies to all users of the City's sewer system and specifies herein
that all users of the City's sewer system are subject to regulation and enforcement.
Authority to Prevent Illicit Discharges
Section 13.04.050 of the City's municipal code prohibits illicit discharges. Key
prohibitions impacting sewer system operation include: ·
• Discharge of storm water, surface water, groundwater, unpolluted industrial
process water, roof runoff, subsurface drainage, or any waters from an
uncontaminated cooling system, swimming pool, decorative fountain or pond,
into any public sewer or any private sewer which is connected to the public sewer
without written permission in conformance with adopted regulations.
• No person shall enter, obstruct, uncover or tamper with any portion of the public
sewer, or connect to it, or dispose anything into any sewer and/or sewer manhole
without the written permission of the utilities director.
• No person shall fill or backfill over, or cause to cover, or obstruct access to, any
sewer manhole.
Key prohibitions of illicit discharges that could potentially impact sewer system operation
include:
• Liquid or vapor having a temperature higher than 140 degrees Fahrenheit;
·-• Water or waste containing substances which may solidify or become viscous at
temperatures between 32 degrees and 150 degrees Fahrenheit;
• Gasoline, benzene, naphtha, fuel oil, or other flammable or explosive liquid, solid
or gas;
• Toxic, noxious or malodorous liquid, solid, or gas deemed a public hazard and
nuisance;
• Garbage that has not been properly shredded to a size of one-fourth inch or less
so that all particles will be carried freely under normal flow conditions in the
public sewers;
• Ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar,
plastics, wood, paunch manure, paper substances or normally dry, solid wastes
capable of causing obstruction to the flow in or damage to sewers or other
interference with the proper operation of the sewerage works;
• Water or wastes having a pH lower than 5.5 or higher than 9.5 or having any
other corrosive property capable of causing damage or hazard to structures,
equipment, and personnel of the sewerage works;
• Water or wastes containing any substance in sufficient quantity to discolor, injure,
disrupt or interfere with the normal operation of any sewage treatment process,
constitute a hazard to human or animal life, create a public nuisance, or
significantly lower the quality of the receiving waters;
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Authority to Ensure Access for Maintenance, Inspection or Repairs
for Portions of Lateral Owned or Maintained by the City
The City does not own any portion of the sewer laterals connecting to the public sewer
mains. Section 13.04.45 of the City's municipal code clearly states maintenance of sewer
laterals is the responsibility of the property owner or parcel occupant/user.
Authority to Limit Discharge of Fats, Oils and Grease or Other
Debris
Section 13.04 .050 of the City's municipal code prohibits the discharge of fats, oils and
grease and other debris through the following general prohibitions:
• \/Vater or waste containing substances which may solidify or become viscous at
temperatures between 32 degrees and 150 degrees Fahrenheit;
• Garbage that has not been properly shredded to a size of one-fourth inch or less
so that all particles will be carried freely under normal flow conditions in the
public sewers;
• Ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar,
plastics, wood, paunch manure, paper substances or normally dry, solid wastes
capable of causing obstruction to the flow in or damage to sewers or other
interference with the proper operation of the sewerage works;
Furthermore, Section 13.06.010 of the City's municipal code prohibits any food service
facility to discharge or cause to be discharged any fats, oils or grease to the sewer
system in concentrations that may result in separation from effluent and adherence to
sewer structures and appurtenances, accumulate and/or cause or contribute to
blockages in the sewer system or at the sewer system lateral which connects the food
service facility to the sewer system.
3.2 Authority to Require Proper Design and Construction
of Sewers and Connections
Section 13.04.050 of the City's municipal code states that "No person shall enter,
obstruct, uncover or tamper with any portion of the public sewer, or connect to it, or
dispose anything into any sewer and/or sewer manhole without the written permission of
the utilities director." All connections to the sewer system require City permission and are
managed and inspected by City of Carlsbad Public Works Construction Management
and Inspection .
All public improvements constructed within the City are required to comply with the City's
Engineering Standards. The City's Engineering Standards provide a comprehensive set
of standards and design criteria to ensure quality and uniformity of the public
improvements constructed in Carlsbad. The City posts these standards on the City
website at:
http://www.carlsbadca.gov/services/building/codes/lde.asp
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4 Operations and Maintenance Program
4.1 Sanitary Sewer System Mapping
4.2
4.2.1
The City of Carlsbad's Utilities Wastewater Program includes an up-to-date map of the
sewer system, showing all gravity fine segments and manholes, pumping facilities,
pressure pipes, as well as a map of all gravity main problem areas. The City of Carlsbad
Utilities field crews have access to up-to-date GIS mapping of stormwater conveyance
infrastructure to help expedite environmental protection in the event of a sewer overflow.
The Utilities Asset Manager oversees the upkeep of sewer system mapping. New capital
improvement projects under development are identified during the planning or permitting
process and input into the geographical information system (GIS) database as a "future"
project. Once capital improvements are constructed, Public Works Engineering provides
"As-Built" drawings to Utilities GIS for final update of the GIS mapping.
Utilities Wastewater field employees also submit corrections to the GIS using mobile
computing devices. The Utilities Operations Supervisor and Utilities Planner/Scheduler
provide requested changes to GIS based on discrepancies identified during CCTV
inspection.
The GIS has a facility identification number (Facility ID) for each individual pipe segment
in the sewer system. Utilities staff track maintenance history by upstream manhole to
downstream manhole (i.e., UpMH-DnMH) and has developed a protocol for splitting
maintenance history in the case a specific asset is divided (e.g., a new manhole is
constructed on an existing pipe segment).
Preventive Maintenance Program
Preventive Maintenance Program
Gravity Sewer Main Cleaning
The City of Carlsbad routinely cleans all gravity mains 12 inches in diameter and smaller
on a four year rotation. In addition, the City has identified specific sewer pipe segments
with a history of maintenance issues as high priority area gravity mains. High priority
area gravity mains are cleaned either quarterly or semi-annually.
Sewer mains larger than 12 inches in diameter are inspected using closed circuit video
(CCTV) inspection on a five-year rotation and cleaned if operations staff determine the
operation of the system might be impacted by material deposited in the pipe.
Sewer Manhole Visual Inspection
Crews tasked with daily cleaning activities perform visual inspections of each manhole
accessed during work activities. The protocol for sewer cleaning is to open both the
upstream and downstream manhole when cleaning a pipe segment. A work order is
documented for each manhole visual inspection including a rating of the condition of
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components of the manhole and an overall manhole condition score of 1 to 5. The
condition scoring scale ranges from 1 (Excellent) to 5 (Very Poor) The Operations
Supervisor, Planner/Scheduler and Utilities Asset Manager review the results of manhole
visual inspections monthly and flag specific manholes with "poor" or "very poor"
conditions for potential follow-up. Follow-up activities include additional reconnaissance,
repair, or rehabilitation.
Chemical Root Control
The City uses chemical root control on select pipe segments known to have significant
root intrusion. The City evaluates maintenance history to make sure root intrusion is the
sole maintenance risk factor for the pipe segment, will determine where the roots are
intruding into the pipe segment, and will evaluate remediation options with the goal of
choosing the most cost effective maintenance approach. The City applies root control
chemical using in-house crews as needed to control root growth.
Sewer Manhole Flow Level Monitoring
The City uses flow level monitoring at select manhole locations to provide an additional
level of system monitoring and failure detection. The City has several use cases for flow
level monitoring, including: -,.
• Secondary Failure Detection for a Lift Station: The monitor is located upstream of
a lift station and will alarm if flow to the lift station is backing up into the upstream
manhole.
• Monitoring Past Problem Locations: The monitor is placed upstream of past
problem locations that may still pose a failure risk.
• Strategic Monitoring of Sewer Mains in Extended Cleaning Area: The flow level
monitor is strategically located upstream of areas in the extended cleaning area
with suspected overflow risk. This includes monitors in areas near lagoons and
waterways to provide an additional level of monitoring of sewer mains with
potential for high impact failures.
All of the flow-level monitors have intrusion alarms providing a time-stamped log of when
the manhole location of the flow-level monitor is accessed. The data collected by the
flow-level monitors is transmitted via cellular technology to a Cloud database. The data is
accessible by City staff via phone or internet. The City contracts with the flow-level
monitoring vendor to analyze the data and send alarms if the flow level as a specific
location violates the criteria set for that location. The Operations Supervisor, or designee,
is responsible for receiving alarms from the flow-level monitors and dispatching
operations and maintenance staff to investigate the alarm.
Gravity Main Closed Circuit Television Inspection
The City of Carlsbad began a system-wide closed-circuit television (CCTV) inspection of
the gravity main sewer system in 2008 and collected inspection data in CUES defect
coding format for small diameter gravity sewers (12-inch diameter and less) and some
large diameter gravity sewers (greater than 12-inch diameter). In 2017, the City
converted to National Association of Sewer Service Companies (NASSCO) Pipeline
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Assessment Certification Program (PACP) system for gravity sewer inspection.
Inspection of large diameter gravity mains is performed on five-year rotation. The
inspection frequency for small diameter gravity sewer mains is based on risk and
inspection is performed over an 8-year period for the lowest risk pipe. Higher risk pipe,
as determined by inclusion on a high priority cleaning area or based on pipe material, are
planned for inspection more frequently. The City has inspected over 90 percent of the
small diameter sewers and the majority of the large diameter sewers. City staff and
contractors are utilized to perform CCTV inspection. Additionally, the City of Carlsbad
field staff will request CCTV inspection of pipe segments if an issue of concern is
encountered during cleaning activities. Issues of concern include:
• Pieces of pipe wall found during cleaning indicating the possibility of a severe
pipe barrel defect;
• Locations in the pipe where the crew had difficulty in passing with the cleaning
equipment indicating the possibility of a severe offset joint, protruding lateral or
other obstruction.
A CCTV crew may conduct localized video inspections when the cleaning crews'
observations warrant such further investigation.
Lift Station Preventive Maintenance
The City owns, operates and maintains eleven (11) lift stations. Utilities is responsible for
operations and maintenance of the lift stations and performs these duties using three
types of activities: operational inspection, SCADA review, and preventive maintenance.
Lift Station Operational Inspections and SCADA review: Utilities lift station crews
perform sewer lift station checks five days per week for larger lift stations and two days
per week for smaller lift stations by visual inspection, physical inspection and by using
the existing SCADA System for inspection. The visual inspections include a survey of the
station area, log hours and/or flow meter reads. The physical inspections include
checking and hand operating pumps, checking alarms, ventilation, odor chemicals and
scrubbers. The Mission SCADA system monitors for alarm set points. Utilities field crews
review SCADA data regularly to look for trends and identify proactive work. The City is
currently planning a SCADA Master Plan project to plan the upgrade and replacement of
the existing SCADA system with the vision that the future SCADA system will have more
monitoring capabilities and be more useful in detecting deteriorating performance of
equipment.
Lift Station Preventive Maintenance: The Utilities Planner/Scheduler and Operations
Supervisor have implemented an extensive schedule of preventive maintenance
activities with the intent of ensuring lift station equipment perform at acceptable levels
throughout the useful life of the equipment. The Utilities Asset Manager, Utilities
Planner/Scheduler and Operations Supervisor review monthly data collected by lift
station crews and will identify a corrective action if there are indications of potential
maintenance issues. All wet wells are cleaned when the need is identified by lift station
maintenance crews and/or the Operations Supervisor.
Lift Station Corrective Maintenance: Lift station maintenance crews identify the need
for potential corrective maintenance activities during lift station operational inspection
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and while performing preventive maintenance activities. The Utilities Planner/Scheduler
and Operations Supervisor will prioritize corrective maintenance work to address pump
station issues. In general, Utilities lift station crews will perform minor repairs and
rehabilitation, while larger scale pump station issues and needs are delivered using
capital improvements projects.
Force Main Inspection and Maintenance
Force mains are pressurized sewer mains that convey wastewater from lift stations to a
manhole where it can flow by gravity. The City owns approximately 3.9 miles of force
mains. Utilities field crews review SCADA data regularly to identify operational trends
and changes in performance. Issues with force main operation, such as a partial
blockage, are detectable using trending analysis and SCADA review. In some cases it
may also be possible to detect a force main failure if a step change in pumping pressure
or run-time is detected. Utilities field crews also visually inspect the alignment of these
pipelines annually to identify any signs of leakage from the system.
When possible, the City designs force mains to have a continuous uphill slope without
high points so that air-release valves are not required on the force mains. If this is not
possible, the City requires air-release valves on high points of a force main. Utilities field
crews inspect air-release valves quarterly and perform additional maintenance as
needed.
The City has initiated a program to evaluate new methods for assessing force main
condition. The City performed inspections of all force mains using either "smart ball"
technology or CCTV inspection between 2017 and 2018.
Inflow and Infiltration Program
Rainfall results in additional water flows into the sewer system through inflow and
infiltration. Water entering from illicit connections is called inflow. Typical sources include
sump pumps, roof drains, surface runoff and unauthorized storm drain connections.
Inflow also includes flows entering at sewer manholes through pick holes or around the
edges of the manhole cover in cases where stormwater flooding covers a manhole.
Infiltration is when water flows through the soil and enters into a pipeline through pipe
joints, cracks, fractures or other pipeline defects. Infiltration typically occurs for some
period after rainfall events when the soil become saturated, yet can also occur during dry
weather conditions in locations where the groundwater elevation is higher than the sewer
pipe.
The City has an on-going program to detect and address inflow and infiltration issues in
the system. The City uses a combination of staff operational knowledge and hydraulic
modeling of the sewer system to identify potential areas in the system with elevated
inflow and infiltration . This process results in the identification of sewer sub-basins that
are targeted for inflow/infiltration evaluation. This evaluation can include targeted flow
monitoring to further isolate the issue and area of concern, as well as to further
characterize the type of problem. Inflow will result in a near-term and short-lived increase
in flows on the order of hours, while infiltration results in a longer-term increase in flow on
the order of days.
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4.3
4 .3.1
Flow monitoring can use used to identify the magnitude of inflow versus infiltration, which
is used to determine the approach to further evaluation or corrective action. In some
cases, Utilities will perform smoke testing to determine potential inflow sources, if flow
monitoring identifies inflow as an issue. CCTV inspection is the primary means to
evaluate whether pipeline defects are the cause of potential infiltration if flow monitoring
identifies infiltration as an issue.
Corrective actions for inflow and infiltration include:
• Outreach: Utilities will perform outreach to property owners to correct illegal
connections. Utilities will notify the property owners of the issue and will check to
confirm the illicit connection is disconnected.
• Small Pipeline Repair: Utilities will perform small repairs to correct acute defects
found to be the source of significant infiltration.
• Pipeline Lining or Replacement: In some cases, Utilities will rehabilitate an
entire pipe segment using cured-in-place pipe lining (GIPP), sliplining, or in some
cases will replace the entire pipe segment.
Information Management
Maintenance Work Management
Utilities maintains a log of all cleaning activities by its 40 cleaning zones in its work
management system. The current work management system interfaces with the GIS
attributes and details the size, material and location of each pipe cleaned, as well as the
equipment utilized, and any relevant remarks observed during the cleaning. The City of
Carlsbad utilizes lnfor IPS software for preventative maintenance and work orders.
Inspection Data Management
Utilities captures CCTV inspection observations using the National Association of Sewer
Service Companies (NASSCO) Pipeline Assessment and Certification Program (PACP)
inspection coding standard and maintains CCTV inspection data in GraniteNet software
which provides easy access for review. Granite Net has a GIS interface which makes it
easy to see problem sewer pipes on a map. Issues found during CCTV inspection are
evaluated and solutions developed on a case-by-case basis. In the past, Utilities
captured CCTV inspection data using the CUES inspection coding system. Ninety
percent (90%) of small gravity sewers currently have CCTV inspection data coded using
the CUES inspection coding system format.
Rehabilitation and Replacement Planning
Risk-Based Prioritization
The City developed the Asset Management Master Plan in 2018-19, included as
Attachment D, which includes a risk model for prioritization and decision logic to identify
repair, rehabilitation and replacement recommendations for condition defects in gravity
sewers and manholes. The risk score for gravity sewers includes quantity and severity
of condition defects, cleaning frequency, pipe capacity, spill volume potential, public
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health and environmental impact, and emergency response impact. The risk score for
manholes includes condition assessment scores from City staff inspections, spill volume
potential, public health and environmental impact, and emergency response impact. The
risk model and decision logic are built in lnnovyze lnfoMaster software which provides a
single GIS based platform for City staff to review CCTV video inspections, manhole
condition assessment scores, risk and decision logic recommendations.
Condition Assessment and Remediation Decision-Making
The City conducts workshops to review CCTV data and make remediation decisions for
large diameter gravity sewers and small diameter gravity sewers with NASSCO PACP
CCTV data format.
Capital Improvement Plan
Asset Management Master Plan
The Asset Management Master Plan recommended a 5-year GIP program for repairs,
rehabilitation and replacement for manholes and gravity sewers based on all CCTV
inspection data available at that time. The GIP recommendations will be updated
annually as new condition assessments are done and evaluated.
Annual Capital Replacement Program Planning
Utilities updates the GIP and project priorities annually through workshops with
engineering and operations staff based on current operating conditions including recent
data such as inspections or flow monitoring. The GIP includes rehabilitation and
replacement projects, as well as repair projects developed by a collaboration of the
Utilitie§,Asset·Manager, Operations Supervisor and Utilities Maintenance ,
Planner/Scheduler. In the future, Utilities intends to use decision support software (i.e.
lnfoMaster) to analyze sewer main and manhole data and make recommendations that
are prioritized by risk.
The City's capital improvement program can be found on the City Budget webpage at:
http://www.carlsbadca.gov/services/depts/finance/budget.asp
Long-Range Capital Financing
The City maintains a 15-year GIP and regularly conducts a cost of service study to
finance the recommended projects. Wastewater replacement revenues are generated by
user fees eq ual to approximately 30 percent of total revenues, and are used to pay for
replacement of existing sewer facilities. The City of Carlsbad's Capital Improvement
Program uses replacement funding, which is set aside annually, to fund Capital
Improvement and Replacement Programs.
4.4 Training Program
The City of Carlsbad staff currently participates in th e Cal ifornia Water Environment
Association (CWEA) certification program for Collection System Maintenance and for
Mechanical Technologist. The City provides on-going in house technical, job skills and
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safety training for its staff and participates in local and regional training events. The City
of Carlsbad has been and continues to conduct training of Waste Discharge
Requirements (WDR) awareness including an SSO Response Training, internal training
programs for sewer line cleaning, combination truck operations, sewer grit removal and
dumping, station valve repair and pump replacement operations and maintenance, and
other related tasks.
4 .5 Equipment and Replacement Part Inventories
The City of Carlsbad maintains a rental pump plan for each sewer lift station and
maintains a portable generator for its sewer lift stations that do not have ~xed emergency
generators.
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5 Design and Performance Provisions
5.1
5.1.1
5.1 .2
The City of Carlsbad requires that all new sewer systems, pump stations and other
appurtenances, as well as the rehabilitation and repair of existing sewer facilities, be
designed and constructed in accordance with the City of Carlsbad's Engineering
Standards:
• Engineering Standards Volume 1 -General Design Standards
• Engineering Standards Volume 3 -Standard Drawings & Specifications.
Both are available on the internet on the City's Codes, Standards & Policies webpage at:
http://www.carlsbadca.gov/services/depts/landev/landdev.asp
Design and Construction Standards and Specifications
Standards for Gravity Sewers
The City's Engineering Standards Volume 1 -General Design Standards, Chapter 6 -
Design Criteria for Gravity Sewer Lines and Appurtenances includes design criteria
applying to both new, repaired and rehabilitated assets. The following are key design
standards included in Chapter 6 -Design Criteria for Gravity Sewer Lines and
Appurtenances:
• Sewer main depth and size
• Sewer lateral depth and size
• Pipeline material types
• Design parameters for gravity sewer main slope, flow and demand
• Horizontal and vertical layout
• Laterals shall be bedded, backfilled and compacted in the same manner as the
sewer main to which they are connected
• Connection to existing manholes shall be core drilled when stubs have not been
provided. Special care shall be used to facilitate the flow when forming the
tributary channel into the existing channel
• Miscellaneous requirements
o The City will only maintain sewer mains located in dedicated right-of-
ways and easements which have all weather vehicular access
o Maintenance of sewer laterals from the main to the building shall be
the responsibility of the property owner
General Guidelines for Sewer Force Mains
The City's Engineering Standards Volume 1 -General Design Standards, Chapter 6 -
Design Criteria for Gravity Sewer Lines and Appurtenances contains general guidelines
for sewer force main design. Key guidelines for force mains include:
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5.1.3
5.1.4
• Minimum clearances per the State of California Department of Public Health
"Guidance Memo No. 2003-02: Guidance Criteria for the Separation of Water
Mains and Non-Potable Pipelines"
• Constructed of High Density Polyethylene or Ductile Iron with polyethylene liner
and external corrosion control
• Dual force mains may be required at discretion of City Engineer where frequent
maintenance is required or due to environmental constraints
General Guidelines for Sewer Lift Stations
The City's Engineering Standards Volume 1 -General Design Standards, Chapter 6 -
Design Criteria for Gravity Sewer Lines and Appurtenances contains general guidelines
for sewer lift station design. The City avoids incorporating sewer lift stations into the
City's sewer system unless deemed essential by the City Engineer. The design
standards provide guidelines for sewer lift stations smaller than 3 million gallons per day
(MGD). All sewer lift stations larger than 3 MGD are designed in close coordination with
City engineering staff.
Standard Drawings
The City of Carlsbad's Engineering Standards Volume 3 -Standard Drawings and
Specifications, Chapter 1 -City of Carlsbad Standard Drawing contains standard
drawings for standard sewer improvements, including:
• S-1 : Standard Sewer Manhole
• S-1A: PVC Lined Manhole
• S-2: Drop Manhole
• S-3: Shallow Manhole
• S-4: Manhole Frame and Cover
• S-5: Pipe Bedding and Trench Backfill for Sewers
• S-6: Sewer Main Cleanout
• S-7: Sewer Lateral
• S-8: Sewer Lateral (Deep Cut)
• S-9: Manhole Marker Post
5.2 Procedures and Standards for Inspection and Testing
The City of Carlsbad's Engineering Standards Volume 3 -Standard Drawings and
Specifications, Chapter 6 -Construction Specifications contains specifications for
inspecting and testing the installation of new sewers, pumps and other appurtenances
and for rehabilitation and repair projects. The City has construction inspection staff
assigned to sewer system improvement projects who are responsible for using
inspection and testing specifications to manage and control quality installation of sewer
system improvements. In addition to frequent contact and oversight of construction
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activities, the construction inspector tests gravity and pressurized sewer pipelines
following:
Division 15, Mechan ical, 15043 -Testing of Gravity Sewer Pipelin es
Gravity sewer pipes are tested for exfiltration and/or infiltration and deflection. Testing
includes a water infiltration test, air pressure test, and a deflection test using a mandeL
The pipe is also inspected using CCTV with all evidence of re reverse slope by ponding
of water or dips in pipe alignment revealed by the closed circuit television inspection shall
be repaired to the satisfaction of the City Engineer at the Contractor's expense.
Division 15, Mechanical, 15044 -Hydrostatic Testing of Pressure Pipelines
Pressurized sewer pipes are tested for leakage by applying and maintaining a test
pressure by means of a hydraulic pump.
Lift Station Inspection and Testing
Lift stations undergo testing throughout the construction phase starting with factory
testing of equipment and fin ishing with field testing of the fu lly constructed lift station prior
to acceptance by the City.
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6 Overflow Emergency Response Plan
The City's Overflow Emergency Response Plan documents the protocols City staff follow
in the event of a sewer overflow and is included as Attachment F1. Table 6-1 provides a
summary of the WDR requirements for an Overflow Emergency Response Plan and the
relevant section of the City's Overflow Emergency Response Plan addressing the WDR
requirement.
Table 6-1: Linkage between Overflow Response Requirements and Overflow
Emergency Response Plan
OERP Requirement
Prompt Initial Notification
Procedures
Appropriate Response to
SSOs
Prompt Notification of SSO
Reaching Waters of the
State
Procedures for Awareness
and Training for Emergency
Response Plan
Procedures to Address
Emergency Operations
Program to Ensure
Reasonable Steps Taken to
Contain and Prevent
Discharge
OERP Section
Section 3 -Overflow Detection and Initial Response
Section 3-Overflow Detection and Initial Response;
Section 4 -Mitigation;
Section 6 -Recovery and Clean Up;
Section 7 -Water Quality Monitoring and Sampling Procedures;
Section 8 -Investigation and Overflow Estimation
Section 10 -Equipment --~~~----,---,-----------,------1
Section 5 -Public Access and Warning;
Section 7 -Water Quality Monitoring and Sampling Procedures
Section 9 -Regulatory Notification and Reporting
Section 12 -Training
Section 11 -Safety
Section 6 -Recovery and Clean Up
SSMP Chapter 4 -Operations and Maintenance Program
6.1 Summary of the Overflow Emergency Response Plan
Sections
The City's Overflow Emergency Response Plan contains the following sections:
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Section 1 -Purpose
This section states that the SewerOverflow Response Plan has been developed to
ensure an appropriate standardized response in the event of a sewer overflow. The Plan
also ensures that the City of Carlsbad is adequately prepared to respond to SSO events
by:
• Reducing or eliminating public health hazards,
• Preventing unnecessary property damage,
• Ensuring thorough recovery and cleanup efforts,
• Properly documenting, notifying and reporting overflow spill events,
• Minimizing the inconvenience of service interruptions, and
• Ensuring staff and contracted personnel are properly trained to respond to such
events.
Section 2 -General
The General Section of the Plan describes the Orders and permits from the-Regional
Board, Carlsbad's obligation to comply, the re lationship between the City of Carlsbad
and the Encina Wastewater Authority, prohibitions, civil and monetary penalties for
enforcement and the definition of a sewer overflow.
Section 3 -Overfl ow Detection and Initial Response
Describes the methods in which overflows may be discovered or detected as well as the
responsibilities of City of Carlsbad personnel to respond to overflows, what a preliminary
assessment and response might consist of, and how to respond to overflows in the
collection system, at lift stations and on private property. This section also describes the
SEMS/lncident Command structure.
Section 4 -Mitigation
Mitigation describes the concept of reducing spill severity and the sensitivity of the
coastal waters and the environment to SSOs.
Section 5 -Pub lic Access and Warning
This section describes procedures to protect the public from a public nuisance by posting
signage.
Section 6 -Recovery and Cleanup
The Recovery and Cleanup section of the Plan describes procedures to be followed for
clean-up of spills into concrete lined storm drains, catch basins, under sidewalk drains,
streets, curbs, gutters and other storm water conveyance structures. The section also
describes procedures to be followed for clean-up of spills into waterways, into lawns or
landscaping, into natural vegetation or environmentally sensitive areas, indoors or from
private lateral spills.
The City of Carlsbad (City) has a Sanitary Sewer Overflow (SSO) Remediation Protocol
for SSOs of 1,000-gallons or more spilled to surface waters. For the purposes of the
SSO Remediation Plan, an SSO is defined as any overflow, spill, release, discharge or
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diversion of untreated or partially treated wastewater from a sanitary sewer system.
SSOs can contain suspended solids, pathogenic organisms, nutrients and other
pollutants that may impact surface and ground waters, threaten public health, or
adversely affect aquatic life. The SSO Remediation Protocol integrates the City's sanitary
sewer infrastructure, Sanitary Sewer Management Plan (SSMP) overflow emergency
response plan(s), adjacent watershed configuration and water quality monitoring
information, sewage spill remediation techniques and other relevant information specific
to SSO response procedures. The SSO Remediation Protocol also includes reference to
existing initial response strategies, an SSO evaluation and adaptive monitoring
remediation approach and identify a suite of potential SSO remediation actions
applicable to potential SSO scenarios.
Section 7 -Water Quality Monitoring and Sampling Procedures
This section describes procedures to be followed for sampling after a SSO has occurred.
Water quality sampling and testing will take place when SSO's of 50 gallons or more
enter receiving waters. These waters include; Buena Vista Creek/Lagoon, Agua
Hedionda Creek/Lagoon, San Marcos Creek and Batiquitos Lagoon. Tests will the
following; Ammonia, Fecal Coliform, E. Coli, Total Coliform, Dissolved Oxygen, Copper,
Zinc and Biochemical Oxygen Demand or BOD.
Section 8 -Investigation and Overflow Estimation
Ensures that overflow quantification is accurate and lists several means of quantifying
overflow. The section also describes what is contained in an overflow events record and
describes an after action report.
Section 9 -Regulatory Notification and Reporting
Describes the different category of spills and the reporting protocol for the various spill
types.
Section 10 -Equipment
Includes a description of vehicles and equipment to support the daily needs, routine
maintenance and emergency situation for the wastewater division.
Section 11 -Safety
Stresses the criticality of resolving a spill incident safely and competently. Describes
typical safety procedures that personnel may be required to implement during spill
responses including; lockout/tagout of equipment for repairs, confined space entry
procedures, traffic and crowd control procedures at site, equipment and/or vehicle
operation, use of personnel protective equipment. This section also outlines safety
training goals.
Section 12 -Training
The Training section outlines reviewing and amending the Overflow Emergency
Response Plan as well as an annual training schedule.
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Lists contact numbers for personnel, outside Districts and Utilities, outside agencies,
lagoon contacts, emergency contractors, general contractors, welding contractors,
electrical contractors, and various suppliers and specialty contracting services.
6.2 Contractor Spill Prevention and Emergency Response
Plans
The City requires all construction contractors performing work on the collection system to
develop, submit and implement a Spill Prevention and Emergency Response Plan as
part of their construction contracts. The contractor Spill Prevention and Emergency
Response Plans include:
• Emergency contact information
• Contact information for notifying impacted parties
• Spill prevention measures and protocols
• Employee training plan and records
• Hazardous substance inventory
• Spill response equipment inventory
• Sewer bypass protocols
• Spill cleanup and disposal protocols
• Spill reporting protocols
City staff review the contractor Spill Prevention and Emergency Response Plan for
approval prior to construction activities. The plan is a formal submittal signed by both the
City's Engineer and Construction Manager responsible for overseeing construction
activities. Attachment F2 includes an example Spill Prevention and Emergency
Response Plan .
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7 Fats, Oils, and Grease Control Program
The City has implemented a FOG source control program to reduce the amount of Fats,
Oils and Grease discharged to the City's sewer system. The City identifies all food
preparation and service locations within its service area. Food preparation and service
locations must keep annual records of maintenance of grease control device(s).
Customers with a history of contributing FOG to the sewer system are sent a letter of
correction. The City maintains an active listing of all food preparation and service
locations and permits are not required at this time.
7 .1 Public Education Outreach Program
Facilities are provided with a FOG binder consisting of an educational video, posters and
other materials educating them on proper FOG disposal. Utilities Wastewater Division
staff, as well as consultants, have met with each food service facility owner to distribute
the FOG binder. The FOG binder contains:
• A list of independent vendors which can provide collection and disposal services in
the service area
• A link to an information video on proper FOG disposal
• A FOG poster promoting best management practices
The City also held a series of workshops in 2008-09 focused on FOG disposal,
interceptor requirements and implementation of Best Management Practices. The City
plans to update public outreach materials in the next two years including:
• FOG program rebranding to increase outreach effectiveness;
• Use of social media to spread FOG messaging;
• Update of the FOG binder used to educate food service facility owners; and,
• Development and sharing of training videos on FOG best management practices.
7.2 Acceptable Disposal Locations
The City provides food service facilities with a list of independent vendors which can
provide collection and disposal services in the service area.
7.3 FOG Legal Authorities
The City possesses the legal authority to prohibit discharges to the system and identify
measures to prevent SSOs and blockages caused by FOG through the City of Carlsbad,
Municipal Code, Chapter 13 (Sewers), Section 13.06.
Table 7-1: Summary of FOG Source Control and Enforcement Legal Authorities
Requirement
GENERAL
Limit the discharge of fats, oils, and grease and other debris
that may cause blockages
26 I July 10, 2019
Source of Authority
Muni Code 13.06.010
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FOG SOURCE CONTROL
Installation of grease control device (GCD)
Design standards for GCD
Muni Code 13.06.040
Muni Code 13.06.090 (Interceptor)
Muni Code 13.06.100 (Trap)
Maintenance and BMP requirements Muni Code 13.06.100; 13.06.120; and
13.06.130
Record keeping and reporting Muni Code 13.06.140
Authority to inspect grease producing facilities
ENFORCEMENT
Enforce any violations of i;;ewer ordinances Muni Code 13.04.080
7.3.1
7.3.2
7.3.3
Authority to Prohibit FOG Discharges
Section 13.06.010 of the Municipal Code prohibits FOG discharge by food service
facilities.
Authority to Inspect Grease Producing Facilities
Section 13.06.150 of the Municipal Code provides authority to inspect and sample a food
service facilities wastewater discharges. The City has the authority to inspect grease
producing facilities through City of Carlsbad, Municipal Code, Chapter 13 (Sewers),
Section 13.06.160 Right of Entry.
Enforcement Authorities
Enforcement of food service facilities for violations of Chapter 13.06 requires an
administrative decision from the Utilities Director through the following steps:
1. Utilities Wastewater Division staff or contractors identify a violation of Chapter 13.06
of the municipal code.
2. Utilities Wastewater Division staff notify the food service facility of the violation and
issue a decision, action or determination for how the food service facility can address
the violation.
3. The food service facility can either choose to address the violation or can file a
written request for appeal hearing with Utilities. The written request must be received
within 10 calendar days of the mailing of Utilities Wastewater Division decision,
action or determination.
4. If Utilities receives an appeal, the Utilities Director will, within 15 days of receipt,
designate a representative to hear the appeal.
5. The appellant meets with the representative to present information supporting their
position concerning the decision, action, or determination.
6. After the hearing, the representative will document their findings in a formal report
with recommendations.
7. The Utilities Director will then issue a written determination, which shall be final.
8. The food service facility can choose to appeal further to the City Council. If the food
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7.4
7.4.1
7.4.2
seNice facility representative fails to appeal or the City Council fails to reverse or
modify the decision, the Utilities Director decision is deemed final.
Once a Utilities Director decision is deemed final, if a food seNice facility fails to rectify
the issue, the City has the authority to issue an administrative citation following the City's
Administrative Code Enforcement Remedies in Chapter 1.10 of the municipal code.
FOG Program Requirements
Best Management Practice , Record-Keeping and Reporting
Requirements
The maintenance requirements, BMP requirements, record keeping and reporting
requirements are found in the following sections of the municipal code:
• Section 13.06.130 Grease interceptor maintenance requirements;
• Section 13.06.030 Best management practices required;
• Section 13.06.130 Grease interceptor maintenance requirement, and;
• Section 13.06.140 Monitoring and reporting conditions.
Food seNice facilities undergo annual Grease Best Management Practices (GBMP)
inspection where the following is evaluated: exhaust hoods, documentation, existing
FOG fixtures, review of best management practices in the food preparation area and
grease control device (GCD) inspection. The inspection is performed by Utilities
Wastewater Division staff or using an inspection contractor.
Grease Control Device Requirements
The City's requirements to install grease control devices are discussed in the following
sections of the City of Carlsbad, Municipal Code, Chapter 13 (Sewers):
• Section 13.06.040 FOG pretreatment required;
• Section 13.06.090 Grease interceptor requirements, and;
• Section 13.06.100 Grease trap requirements.
The City has a standard drawing for the grease interceptor. Utilities Wastewater Division
staff, or the inspection contractor, performs an annual Grease Control Device Inspection
(GCDI) to ensure that interceptors are routinely seNiced to minimize FOG discharges to
the sewer system. The City performs more frequent inspections of those facilities
experiencing inconsistent maintenance practices.
7 .5 Preventive Maintenance Program to Address FOG
Accumulation
The City has identified the pipe segments of the sewer system subject to higher levels of
FOG and has assigned these pipe segments to either a quarterly or semi-annual
cleaning schedule. As sewer lines are cleaned, the severity of the FOG accumulation is
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documented in the lnfor Public Section (IPS) work management system and the cleaning
program is updated based on the most recent data collected by field staff.
7 .6 Source Control Measures for All Sources of FOG
Discharged
The City addresses all known locations of FOG accumulation through either FOG source
control inspections of food service facilities and/or preventive maintenance cleaning on
pipe segments with known propensity for FOG accumulation. The City's Utilities
Wastewater Division cleans pipe segments with excessive FOG accumulation issues
quarterly.
7.7 FOG Program Staffing
Utilities Wastewater Division staff are responsible for performing food service facility
inspections. In some cases, Utilities Wastewater Division contracts with an inspection
service provider for support with performing the annual food service facility inspections.
All follow-up inspections and enforcement interactions with food service facilities is
performed by City staff.
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8 System Evaluation and Capacity Assurance
Plan
The City has implemented a program to assure system capacity to convey peak dry
weather flows as well as peak wet weather flows generated during a 10-year design
storm event. The City updated the Sewer Master Plan in 2019. The plan includes wet
weather monitoring, evaluation of peak flow including rainfall derived infiltration and
inflow, updated unit sewer flows, projected build-out wastewater flows, and a hydraulic
model of the entire collection system.
8.1 Evaluation to Identify Potential Hydraulic Deficiencies
In 2018, the City updated capacity analyses of the existing and build-out scenarios to
determine if there are any potential capacity deficiencies. The plan aligned flow
monitoring data with the lnfoSWMM hydraulic model, incorporated flows from other
regional member agencies and updated flows for seasonal demand changes due to
tourism in the summer.
Flow monitoring was used to evaluate the monitoring of regional flows from member
agencies. System flows identified through flow monitoring in the 2019 Sewer Master Plan
are less than flows identified in the previous master plan and this reduction in flow is
primarily attributed to water conservation. The City is evaluating odor complaints and
cleaning frequencies due to the low flows.
The capacity assessment utilizes a 10-year design storm event that aligns with a
member agency design storm that shares sewer interceptor systems with the City so the
hydraulic analysis is aligned and easier to evaluate between the two systems.
Dynamic Hydraulic Model
The hydraulic model is fully dynamic and is utilized to evaluate surcharge, backflow and
SSO conditions in addition to pipe flows and capacity. Water billing data was used to
update unit sewer flows used in the hydraulic model to reflect current conditions.
The pipe capacity and flow information from the hydraulic model is used in the City's risk
model which identifies pipes with less capacity and higher flows as higher risk.
Communication and Coordination with Neighboring Agencies
The City jointly owns an outfall interceptor sewer, two lift stations, and associated force
mains with the City of Vista. The outfall interceptor routes sewage appr-oximately 7.5
miles through these two (2) lift stations and associated force mains to the Encina Water
Pollution Control Facility. Both jointly-owned lift stations are operated and maintained by
Encina Wastewater Authority under various MOUs and agreements. The City of
Carlsbad coordinates closely with both the City of Vista and Encina Wastewater Authority
on issues impacting the jointly-owned infrastructure through regular Member Agency
Meetings hosted by Encina Wastewater Authority. As part of ongoing system evaluation
the City meets regularly with Encina Wastewater Authority member agencies to discuss
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ongoing interagency issues (e.g. flow monitoring, l&I, future development projects). This
includes potential future development impacting jointly-owned infrastructure.
8.2 Design Criteria
The City's sewer system design criteria is located in the 2019 Sewer Master Plan and
Chapter 6 of Volume 1 of the City's Engineering Standard. Design criteria for Carlsbad
for designing pipe is d/D of less than or equal to 0.75 for pipe greater than 12-inch
diameter, and 050 for pipe less than or equal to 12 inch diameter. Trigger criteria for
upsizing a pipe was developed in the 2019 Sewer Master Plan which is d/D of 0.90 or
greater and q/Q of 1.0 or greater.
8.3 Capacity Enhancement Measures
The 2019 Sewer Master Plan utilizes the results of the evaluation and trigger criteria to
recommend short-and long-term CIP projects for existing and system build out
scenarios. A few minor deficiencies were identified in the existing system scenario which
are identified for short-term projects. There were a few deficiencies identified in the
build-out scenario that are identified for longer-term projects. The 2019 Sewer Master
Plan includes cost estimates, schedule and prioritization for improvement of existing
wastewater collection and treatment facilities. The City conducts smoke testing and
temporary flow monitoring when potential inflow and infiltration issues are identified and
takes steps, such as CIP projects or customer notification, to address issues. The 2019
Sewer Master Plan capacity projects are coordinated with condition related projects
identified in the Asset Management Master Plan. The City regularly conducts a cost of
service study to finance the recommended projects. Water and wastewater replacement
revenues are generated by user fees equal to approximately 30 percent of total
revenues, and are used to pay for replacement of existing water and sewer facilities.
8.4 Schedule for Completion of Capital Program
The 2019 Sewer Master Plan identifies completion dates and trigger criteria for CIP
projects related to hydraulic deficiencies. The City updates the CIP and project priorities
annually through workshops with engineering and operations staff based on current
operating conditions including recent data such as inspections or flow monitoring. The
City maintains a 15-year CIP.
SUPPORTING DOCUMENTS
The following documents, support the City's System Evaluation and Capacity Assurance
Plan , thereby allowing the City to comply with the System Evaluation and Capacity
Assurance Plan requirements of the WDR:
City of Carlsbad Engineering Standards, Volume 1 -Chapter 6
http://www.carlsbadca.gov/services/depts/landev/landdev.asp
2019 Sewer Master Plan
http://www. carlsbadca. gov /services/depts/landev /landdev. asp
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Capital Improvement Program
http://www.carlsbadca.gov/services/depts/finance/budget.asp
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9 Monitoring, Measurement, and Program
Modifications
The City has developed a leading edge performance management system to monitor
and measure the effectiveness of the SSMP program implementation and to perform
data analytics to diagnose the root causes of issues impacting SSMP program
effectiveness. The City uses this system to monitor the performance of the collection
system on an on-going basis through monthly performance management system reviews
performed at the operating unit level, and annually during Utilities business planning,
goal setting and the annual budget review.
9.1 Collection and Management of Relevant Data
Table 9-1 lists the information systems the City uses to collect, store and analyze SSMP
program data. Key data collected by City staff includes:
• Pipe, manhole and pump station asset attribute data
• Pipe, manhole and pump station asset failure history
• Pipe, manhole and pump station maintenance schedule and work history
• Pipe, manhole and pump station asset inspection data
• Pipe, manhole and pump station asset remediation decisions
The data collected in these information systems provides the source data for the City's
performance management system.
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Table 9-1: Information Systems Used to Collect, Store and Analyze Relevant
SSMP Program Data
Information
I System
ESRI GIS
lnfor Public
Sector-
Hansen
Cues
GraniteNet
lnfoMaster
Tableau
System Type
Geographical
information
system
Maintenance
management
system
Asset inspection
software
Asset decision
support software
Visual analytics
Data or Information Stored
Pipe and manhole geospatial and attribute
data; pump station location
Pump station asset attribute data; Pipe,
manhole, pump station maintenance schedule
and work history; manhole inspection data;
remediation history
Pipeline inspection data
Pipe and manhole remediation decision ; pipe
risk assessment data
Business intelligence. Used for the
performance management system to see and
understand the data.
9.2 Active Performance Management of SSMP Program
Effectiveness
The City actively monitors SSMP program effectiveness using a multi-layer performance
management framework that incorporates the types of performance measurement
described in Table 9-2. This multi-layered performance management system is linked to
the live information systems providing timely data analysis. The City spent several years
building and perfecting this system and it is proving to be an invaluable tool for assessing
SSMP program effectiveness, drilling down into the root causes of sewer overflows and
the process breakdowns that may be impacting the overall performance of the SSMP
program implementation.
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Table 9-2: Multi-Layered Performance Management Framework
Measurement
Type
Failure analysis
Productivity
analysis
System flows
conveyed
System condition
monitoring
Production
monitoring
Field staff
utilization tracking
Unplanned work
volume tracking
Measurement Description
The City reviews reported SSOs, prevented SSOs, and lift station equipment.
failures. These events drive root cause analysis. Failure events are visualized
on charts to show monthly or seasonal changes and on maps to show
geographical trends.
The City is tracking the unit cost of routine cleaning, frequency cleaning , and
routine filming to provide insight into work efficiency as well as insight into
potential work capacity issues that may be arising.
The City compiles data from EWA reporting to track average flows from the six
EWA owners into Water Pollution Control Facility. The City is also tracking the
ratio of gravity flows versus pumped flows and the ratio of the flow conveyed to
EWA from the City versus the overall flow.
The City is closely monitoring the type and severity of material found during
cleaning activities; manhole condition ratings; and CCTV inspections
surpassing condition threshold. This data is charted and mapped to support
root cause analysis drill downs. System condition monitoring is also used to
change preventive maintenance frequencies for sewer cleaning.
Production of key SSMP program activities are monitored including preventive
maintenance cleaning production and average daily footage; preventive
maintenance filming production and daily footage; ratio of scheduled versus
completed lift station preventive maintenance; the number of scheduled lift
station preventive maintenance work orders by priority; and the number of
incomplete lift station work orders. These are visualized in various charts for
analysis. ·
The City tracks the available time of collection system and lift stations
operators. This provides insights into why production may be impacted.
The City is tracking the volume and types of service requests; the volume of
unscheduled lift station work orders; and the costs of unscheduled work
activities by lift station.
9.3 Assessment of Preventive Maintenance Program
Success and SSO Trends
The success of the preventive maintenance program is evaluated monthly using both
leading and lagging indicators built into the performance management system. Lagging
indicators include analysis of failures such as SSOs and private lateral sewage
discharges as well as potential failures such as blockages and lift station alarms. Leading
indicators include productivity analysis, production monitoring, system condition
monitoring and unplanned work volume tracking. The City works towards maximizing
planned work and minimizing failures. Each failure or potential failure is monitored to
determine if a trend is forming. Based on the analysis, corrective actions may include
localized preventive maintenance program modifications (i.e., changes to a small number
of pipe segments), such as a change to maintenance method or frequency, or, if a trend
appears to be forming, a programmatic maintenance program change to address
problems impacting a geographical area or specific asset class. The City's SSO rate has
averaged below 1 SSO per 100 miles of sewer pipelines since October 2015, which is
well below the regional average. This SSO rate is a strong indicator of the success of our
preventive maintenance program.
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9.4 Program Updates Driven by Performance Monitoring
The majority of program updates driven by performance monitoring affect a small
number of assets with a change occurring at the asset level with the modification being a
maintenance method or frequency change. The City is continually optimizing the
maintenance program to perform inspection and maintenance activities at the right
frequencies, using efficient methods and tools, and balancing cost with benefit derived.
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10 SSMP Program Audit and SSMP Updates
The City uses the SSMP audit process to identify actions for improving how it manages,
operates, and maintains the collection system. This process identifies the tasks and
actions that are required to meet SSMP goals and defines and prioritizes them. In
addition, the City formally updates and recertifies the SSMP at a minimum of every five
years. Table 10-1 shows the timeline for SSMP audits and updates for the last five years
and the anticipated schedule for the next five years. The City's most recent SSMP
Program Audit Report is included as Attachment J.
2016
2019
2019
2021
2023
2024
Table 10-1: SSMP Audit and Update Schedule
Year Audit
Bien ial self-audit completed in Janua[Y 2016
Biennial third-party audit completed in April 2019
5-year SSMP UJ:>date comi:>leted in October 2019
Biennial self-audit planned in early 2021
Biennial self-audit planned in early 2023
5-year SSMP update planned in late 2024
10.1.1 SSMP Program Audit Process
A team of experienced personnel is formed once every two years to perform biennial
self-audits in accordance with regulatory requirements for SSMP Program Audits. The
team consists of representatives from relevant city departments and is led or assigned by
the Primary LRO. In a series of in-person meetings over the course of approximately
three months, the audit team evaluates the effectiveness of each SSMP element,
identifies any deficiencies, and makes recommendations for improvements and updates.
This is done by answering a set of questions developed specifically for the purpose of
the audit for each element of the SSMP. It also includes referencing and reviewing
performance reports and measures monitored throughout the year using the SSMP
program performance management system. These findings are documented in an audit
report. Once the audit is complete, a QC review of the audit report is performed, with a
focus on consistency, completeness, and inclusion of references and attachments as
appropriate. The final audit report is reviewed by the Primary LRO before final
acceptance. Audit reports and related materials are maintained in a hard copy and an
electronic file is stored on the City's server.
10.1.2 Audit Implementation and Tracking of Results
Once audit report findings and corrective actions are finalized, City staff responsible for
the various elements of the SSMP program implementation review the SSMP program
audit findings to determine an appropriate course of action. City staff will inform the
Primary LRO if plans to address an audit finding deviates from the corrective action
identified in the SSMP program audit report. The implementation progress of SSMP
program audit corrective action are measured and reported on an ongoing basis to
ensure timely completion of corrective actions. Any deficiencies in meeting the schedule
are identified or anticipated and mitigation measures developed and implemented to
ensure the corrective actions from the audit are addressed. Each subsequent audit
update begins with a review of the previous audit to identify any corrective actions that
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10 .2
have been not been addressed. As described in Element Error! Reference source not f
ound. Error! Reference source not found., any updates necessary to enhance the
SSMP performance are included as a part of the following year's budgeting process
and/or the formal SSMP program audit.
SSMP Update Process
The Utilities Manager is responsible for ensuring the SSMP is updated when major
changes occur to the SSMP program implementation or at a minimum of five years from
the previous SSMP update, approval and recertification. The results of the prior SSMP
program audit reports are factored into the SSMP update process.
References for Further Information
• SSMP Program Audit Report, 2019 kept on file at City Public Works Utilities as required
per the General Waste Discharge Requirements ·
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11 Communication Plan
11.1
11.2
The City communicates with the public and neighboring agencies on an on-going basis.
The following sections describes the processes the City uses to communicate with the
public and neighboring agencies.
Communication with the Public
The City communicates with the public on a continual basis through the City website and
City Council meetings, which are open to the public. The updated SSMP is discussed
and approved at a City Council meeting. The last 5-year SSMP update was approved at
a City Council meeting on October 21, 2014, providing the public with the opportunity to
review the .SSMP, as part of the City Council meeting attachments, and to comment on
the SSMP at the City Council meeting.
The City website also provides a continual link for the public to download the Sewer
System Management Plan at:
http://www.carlsbadca.gov/services/depts/pw/utils/sewer/default.asp
The webpage also invites the public to send any comments on how the City is operating
and maintaining the sewer system to wastewater@carlsbadca.gov or to call at 760-438-
2722. These modes of communication can occur at any time during development and
implementation of the SSMP.
Communication with Tributary or Satellite Systems
The City has no public systems tributary and/or satellite to the City of Carlsbad's sanitary
sewer system. The City has two large private systems discharging into the City's
collection system:
• Rancho Carlsbad HOA
• Lakeshore Gardens Mobile Home Park
The City jointly owns an outfall interceptor sewer, two lift stations, and associated force
mains with the City of Vista. The outfall interceptor routes sewage approximately 7.5
miles through these two (2) lift stations and associated force mains to the Encina Water
Pollution Control Facility. Both jointly-owned lift stations are operated and maintained by
Encina Wastewater Authority under various MOUs and agreements.
All flows from the City are conveyed to the Encina Water Pollution Control Facility,
owned by Encina Wastewater Authority (EWA), for treatment and disposal. The Utilities
Director participates in monthly Member Agency Meetings hosted by EWA, which is
owned by six public agencies governed by a Joint Powers Agreement. Under this
agreement, owners share in the operational and management costs of EWA. The six
owners are:
• City of Carlsbad,
• City of Vista,
• City of Encinitas,
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• Vallecitos Water District,
• Buena Sanitation District, and
• Leucadia Wastewater District.
The City of Carlsbad Utilities Director attends monthly Member Agency Meetings (MAM)
hosted by EWA to discuss and resolve issues impacting all parties. The MAM is primarily
focused on issues related to the Water Pollution Control Facility, yet can be utilized as a
forum to discuss sewer system issues and WDR compliance if necessary. EWA also
hosts a Collection Managers Meeting, which is attended by the City of Carlsbad
Wastewater staff. This forum provides direct access to the various collection system
managers of nearby agencies when needed.
Through these mechanisms, the City is able to communicate with both the public on an
on-going basis as well as with collection system managers of nearby agencies when
needed to address issues impacting the City's sewer system.
40 I July 10, 2019
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Sewer System Management Plan O,
2019 SSMP Update •
At tachmen ts
IEII
A1
List of Attachments
Title
State Board's Order No. 2006-003, Statewide General
Waste Discharge Requirements for Sanitary Sewer
Systems
Owner
Wasko
State Of California Water Resources Control Board, Order Wasko
No. WQ 2013-0058-EXEC, Amending Monitoring And
Reporting Program for Statewide General Waste
Discharge Requirements for Sanitary Sewer Systems
A3 California Regional Water Quality Control Board, Region 9, Wasko
Order R9-2007-0005 entitled Waste Discharge
Requirements for Sewage Collection Agencies in the San
Diego Region
SSO Response, Notification and Reporting Workflow
C Reserved
D Asset Management Master Plan
E Reserved
F2 Example Spill Prevention and Emergency Response Plan
Reserved
H Reserved
Reserved
J SSMP Program Audit Report, April 2019
K Reserved
Casteneda
Harrison
Casteneda
Wasko
Last Updated
N/A
N/A
N/A
July 2019
November 2018
April 2019
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Sewer System Management Plan
2019 SSMP Update
Attachment A 1
State Board's Order No. 2006-003, Statewide
General Waste Discharge Requirements for
Sanitary Sewer Systems
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Sewer System Management Plan O,
2019 SSMP Update •
Attachment A2
State Of California Water Resources Control
Board, Order No. WQ 2013-0058-EXEC,
Amending Monitoring And Reporting Program
for Statewide General Waste Discharge
Requirements for Sanitary Sewer Systems
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Sewer System Management Plan
2019 SSMP Update
Attachment A3
California Regional Water Quality Control
Board, Region 9, Order R9-2007-0005 entitled
Waste Discharge Requirements for Sewage
Collection Agencies in the San Diego Region
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Sewer System Management Plan O.,
2019 SSMP Update •
Attachment B
SSO Response, Notificatior:, and Reporting
Workflow
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Sewer System Management Plan
2019 SSMP Update
Attachment D
Asset Management Master Plan
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Attachment F1
Sewer System Management Plan
2019 SSMP Update
Overflow Emergency Response Plan
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Sewer System Management Plan .
2019 SSMP Update
Attachment F2
Example Spill Prevention and Emergency
Response Plan
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EXHIBIT 2
PRIOR CITY COUNCIL ACTIONS
1. On Oct. 21, 2014, City Council adopted Resolution No. 2014-251, authorizing the Legally
Responsible Official to re-certify the Sewer System Management Plan (SSMP) and submit the
SSMP to the State Water Resources Control Board (SWRCB).
2. On July 21, 2009, City Council adopted Resolution No. 2009-192, approving the City SSMP and
authorizing staff to certify the City's Program to implement the SSMP and to submit the report
to the SWRCB.
3. On Sept. 23, 2008, City Council adopted Ordinance No. CS-010, amending Title 13, regulating
Fats, Oil and Grease Program (FOG).
4. On Nov. 6, 2007, City Council adopted Resolution No. 2007-282, approving the Development
Plan and Schedule for the SSMP.
5. On July 24, 2007, City Council adopted Ordinance No. NS-851, amending Title 13, Chapter 13.04,
of the Carlsbad Municipal Code pertaining to Sewer Laterals.
RELEVANT STATE REGULATIONS
1. SWRCB Order No. WQ2013-0058-EXEC, amending Monitoring and Reporting Program for
Statewide General Waste Discharge Requirements for Sanitary Sewer Systems
2. SWRCB Order No. 2006-0003-DWQ, Statewide General Waste Discharge Requi rements for
sanitary sewer systems.
3. Porter-Cologne Water Quality Control Act, California Water Code, Division 7, section 13267.
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EXHIBIT 3
Summary of Revisions to the Sewer System Management Plan (SSMP)
SSMP Section Description of Changes
'
Section 1-Goal Updated to include:
and Overview
• the City's sewer system management goals and their relationship to the City's overall
goals and values
• specific operating objectives moved into the relevant SSMP sections for operation and
maintenance, capacity assurance and Sanitary Sewer Overflow (SSO) response
• a new subsection providing an overview of the sewer system
Section 2 -Updated to include:
Organization
• an organizational chart for the SSMP program showing key positions responsible for
implementation of elements of the program and lines of authority
• designation of the Wastewater Supervisor to serve as a backup Legally Responsible
Official (LRO) when the primary LRO (Wastewater Manager) is not available
• removal of sections related to SSO reporting, as they are covered in the Overflow
Emergency Response Plan section
Section 4-Updated to include:
Operations and
Maintenance • the processes the City employs to keep system mapping up to date
Program • additional detail regarding the City's use of manhole inspection data to identify
manhole repair needs and the force main inspection and preventive maintenance
program
• a description of the rehabilitation planning processes including the use of decision
logic and risk assessment
Section 6-Updated to include:
Overflow
Emergency • a definition for Private Lateral Sewage Discharge
Response Plan • additional detail for initial response activities
• distinctions between response actions during regular work hours and after work hours
• procedures for cleaning pipes upstream and downstream of blocked pipe segments
• protocols for post-SSO closed caption television (CCTV) inspection
• update of water quality monitoring protocols
• update of Post-SSO Review protocols
• update of contact information
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EXHIBIT 3
SSMP Section Description of Changes
Section 8-Updated to include:
System
Evaluation and • reference to the SSMP assessment criteria
Capacity • recent efforts to update the hydraulic model
Assurance Plan
• outcomes of the recent master plan update process
Section 9-Updated to include:
Monitoring,
Measurement, • highlights of the City's best practices in collection system performance management
and Program
Modifications
Section 10-
SSMP Program
Updated to include:
Audits • description of current Program Auditing practices
• Program Audit schedule for future audits
Section 11-Updated to include:
Communication
Program • description of the local Member Agency Managers meeting and Collection Managers
Meeting, which provide opportunities for communicating issues with neighboring
agencies and fostering collaboration and interagency assistance
• description of the current outreach practices employed by the City
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