Belmont City Council
July 8, 2025

Legal Authority
This SSMP Element outlines the City Municipal Code Chapters and Ordinances that provide the City with the legal authority to:
a. Prevent illicit discharges into its sanitary sewer system from inflow and infiltration (I&I); unauthorized stormwater; chemical dumping; unauthorized debris; roots; fats, oils, and grease; and trash, including rags and other debris that may cause blockages;
b. Collaborate with storm sewer agencies to coordinate emergency spill responses, ensure access to storm sewer systems during spill events, and prevent unintentional cross connections of sanitary sewer infrastructure to storm sewer infrastructure;
c. Require that sewer system components and connections be properly designed and constructed;
d. Ensure access for maintenance, inspection, and/or repairs for portions of the service lateral owned and/or operated by the Enrollee;
e. Enforce any violation of its sewer ordinances, service agreements, or other legally binding procedures; and
f. Obtain easement accessibility agreements for locations requiring sewer system operations and maintenance, as applicable.

Operation and Maintenance Program
City operation and maintenance of its collection system ensures that the system is kept in good working condition, and this SSMP Element outlines the work that is conducted to accomplish the optimal operation and maintenance of the City collection and conveyance system. This SSMP Element details a:
a. Up-to-date maps of the sanitary sewer system, and procedures for maintaining and providing State and Regional Water Board staff access to the maps. The maps must show gravity line segments and manholes, pumping facilities, pressure pipes and valves, and applicable stormwater conveyance facilities within the sewer system service area boundaries.;
b. A scheduling system and a data collection system for preventive operation and maintenance activities conducted by staff and contractors. a. The scheduling system includes:
i. Inspection and maintenance activities;
ii. Higher-frequency inspections and maintenance of known problem areas, including areas with tree root problems;
iii. Regular visual and closed-circuit television (CCTV) inspections of manholes and sewer pipes.

The data collection system documents data from system inspection and 142
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August 2025

maintenance activities, including system areas/components prone to rootintrusion potentially resulting in system backup and/or failure. c. In-house and external training provided on a regular basis for sanitary sewer system operations and maintenance staff and contractors. The training covers:
i. The requirements of this General Order;
ii. The Enrollee’s Spill Emergency Response Plan procedures and practice drills;
iii. Skilled estimation of spill volume for field operators; and iv. Electronic CIWQS reporting procedures for staff submitting data. d. An inventory of sewer system equipment, including the identification of critical replacement and spare parts.

Design and Performance Provisions
The Design and Performance Provisions Element describes the standards and specifications for new construction, repair of the existing sanitary sewer system, and the inspection and testing of these items.

Spill Emergency Response Plan
The Spill Emergency Response Plan (SERP) contains the following information in order to protect public health and the environment in the event of a sewer spill:
a. Notify primary responders, appropriate local officials, and appropriate regulatory agencies of a spill in a timely manner;
b. Notify other potentially affected entities (for example, health agencies, water suppliers, etc.) of spills that potentially affect public health or reach waters of the State;
c. Comply with the notification, monitoring and reporting requirements of this General Order, State law and regulations, and applicable Regional Water Board Orders;
d. Ensure that appropriate staff and contractors implement the Spill Emergency Response Plan and are appropriately trained;
e. Address emergency system operations, traffic control and other necessary response activities;
f. Contain a spill and prevent/minimize discharge to waters of the State or any drainage conveyance system;
g. Minimize and remediate public health impacts and adverse impacts on beneficial uses of waters of the State;
h. Remove sewage from the drainage conveyance system;
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i. Clean the spill area and drainage conveyance system in a manner that does not inadvertently impact beneficial uses in the receiving waters; j. Implement technologies, practices, equipment, and interagency coordination to expedite spill containment and recovery;
k. Implement pre-planned coordination and collaboration with storm drain agencies and other utility agencies/departments prior, during, and after a spill event; l. Conduct post-spill assessments of spill response activities; m. Document and report spill events as required in this General Order; and n. Annually, review and assess effectiveness of the Spill Emergency Response Plan, and update the Plan as needed.

Pipe Blockage Control Program
The goal of the Pipe Blockage Control Program is to reduce and/or eliminate the amount of pipe blocking materials such as fats, oils and grease wipes, roots, etc., that may be discharged to the sanitary sewer system. This is implemented through public outreach, operations and maintenance activities, investigations and FOG Program inspections.

System Evaluation, Capacity Assurance, and Capital Improvement Plan The City completed a Sanitary Sewer Master Plan Update (SSMPU) in 2024 to assess the existing, near term and long-term capacity needs and the condition of the system to safely collect and convey wastewater. The SSMPU identified capital improvement projects which included staff O&M based projects, hydraulicly deficient projects, lift station evaluation projects and ongoing CCTV data. The City prioritized these projects based on the following criteria:
o Size
o 2043 Peak Wet Weather Flow Projections
o Proximity to Critical Facilities
o Proximity to Water Bodies
o Nearest Street Type
These analyses identify areas that are capacity deficient and/or structurally deficient under existing and future conditions. Recommended capital improvement projects are prioritized as a result of this analysis. An additional Vulnerability Assessment will be required to meet some of the additional (2022) requirements included in the WDRs.

Monitoring, Measurement, and Program Modifications
The City monitors the implementation of the SSMP Elements in order to measure the effectiveness of the City SSMP program in reducing sewer spills. This SSMP Element outlines the manner in which each SSMP Element is monitored and evaluated and the schedule with which the City completes this monitoring and evaluation.

Sewer System Management Plan Program Audits
The SSMP Program Audits Element outlines the audit process and identifies City Staff responsible for conducting or participating in SSMP Program Audits and generating the 144
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August 2025

required SSMP Program Audit Report. SSMP Program Audits must occur at a minimum of every three (3) years and are required to evaluate the City SSMP Program, identify program deficiencies, and provide an improvement schedule based on the audit findings.

Communication Program
This SSMP Element describes the manner in which the City communicates the development, implementation, and performance of its SSMP with the public in order to provide them with the opportunity to provide input as the SSMP program is developed and implemented.
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Element 1 – Goal
City of Belmont
August 2025

ELEMENT 1 - GOALS, REGULATORY CONTEXT, ASSET OVERVIEW AND

SCHEDULE
The City of Belmont (City) has the following goals for the management and maintenance of the industrial sanitary sewer collection system. These goals provide focus for City Staff to continue high-quality work to operate and maintain City facilities and to implement improvements for management of the collection system to prevent sanitary sewer spills (Spills). The role of the SSMP in supporting these goals is discussed below.

These goals will be evaluated annually in Element 9: Monitoring, Measurement and Program Modification to assess the City’s success in implementing and meeting the objectives of these goals.

1.1 Regulatory Requirement
WDR Order No. 2022-0103-DWQ Attachment D1 states:

The goal of the Sewer System Management Plan (Plan) is to provide a plan and schedule to: (1) properly manage, operate, and maintain all parts of the Enrollee’s sanitary sewer system(s), (2) reduce and prevent spills, and (3) contain and mitigate spills that do occur.

1.2 Sanitary Sewer System Goals
The City seeks to provide high quality and reliable wastewater collection and conveyance for its residents and businesses.

City SSMP Goals:
▪ Properly manage, operate, and maintain the wastewater collection system; ▪ Demonstrate legal authority through the use of ordinances for enforcement of violations to effectively manage the sewer system;
▪ Minimize the frequency and severity of sanitary sewer overflows. ▪ Protect public health, prevent hazards and unnecessary damage to public and private property;
▪ Respond quickly and respectfully to public notifications of sanitary sewer spills;
▪ Provide adequate capacity to convey peak flows to the wastewater treatment plant;
▪ Perform routine system inspections to effectively maintain and identify problem areas of the sewer system and address these areas through the Capital Improvement Plan for scheduling and funding proposed projects; ▪ Conduct regular cleaning of sewer main lines and more frequent cleaning of high maintenance areas until permanent repairs can be made; ▪ Perform all operations in a safe manner to avoid personal injury and property damage.
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1.3 Regulatory Context and Schedule for Audits and Updates As required by Statewide Sanitary Sewer Systems General Order 2022-0103-DWQ, the SSMP contains several elements which are referenced in the table of contents that will help the City accomplish the goals mentioned in this element. The City is dedicated to implementing each Element of the SSMP and tracking any revisions that may be necessary as program implementation progresses. The current 2025 SSMP update was completed prior to the due date of August 2, 2025.

The City will begin their next SSMP Audit after August 2, 2027, Audit Period End Date with an identified Audit period of August 2, 2025, through August 2, 2028, for completion by February 2, 2028. The Audit will evaluate how the SSMP meets regulatory requirements, implementation of the SSMP, success of preventative maintenance program, and sewer spill trends. A plan and schedule will be developed for the correction of any deficiencies identified in the audit and any necessary updates or general plan changes that may be required.

The City will annually review and evaluate the SSMP, Preventative Maintenance Program, and Spill Trends to identify areas of their sewer operations that may need to be modified to comply with existing regulatory requirements and reduce the number of sewer spills occurring in a calendar year.

The SSMP 6-Year Update will begin on or before March 2031 for completion, adoption and recertification by August 2, 2031.

In addition to the SSMP Update and SSMP Audit discussed above, the City has identified additional near-term compliance dates as required by General Order WQ-2022-0103-DWQ:
• Annual Report of Category 4 Non-Lateral Spills: February 1st of each calendar year • Annual Report: April 1st of each calendar year
• Electronic Sanitary Sewer System Service Area Boundary Map: December 31, 2025

1.4 System Asset Overview and Service Area
The City sewer collection and conveyance system is located in San Mateo County, serving a population of approximately 25,500 customers in an 4.7 square mile service area with 7690 lateral connections. The City’s wastewater collection system is divided into 15 sewer basins with approximately 80 miles of gravity mains, 10 lift stations, and approximately 3.4 miles of force mains. Currently, the majority of the City’s wastewater flows are carried by two parallel trunk sewer lines along Ralston Ave, herein referred to as “Ralston Trunk Lines”, and discharged into the Belmont Pump Station (BPS) that is owned and operated by Silicon Valley Clean Water (SVCW) and subsequently treated at the SVCW Wastewater Treatment Plant (WWTP). A small portion of wastewater flows are discharged into the wastewater collection systems of the City of San Mateo (San Mateo) and a small portion of wastewater flows are flowing from and to the City of San Carlos (San Carlos). SVCW recently completed the construction of Belmont Gravity Pipeline (BGP) project and is planning to demolish the BPS. The City’s wastewater will be discharged into BGP and carried to the San Carlos Pump Station by gravity once BGP is in service. Gravity pipelines vary in diameter from 6-inch to 27-inches. There are no air/vacuum relief valves associated with these force mains.
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The following table shows the age of the system sewer lines:

Construction Period Percent of
System
Footage (feet)
2020 - current 1.36% 5,737
2000 - 2019 42.32% 178,383
1980 – 1999 20.64% 87,003
1960 – 1979 14.52% 61,190
1940 – 1959 14.91% 62,846
1920 – 1939 5.84% 24,615
Unknown 0.41% 1.722
TOTAL 100% 421,498
There are 2,564 manholes throughout the system. The sewer system is restricted to providing sanitary sewer flows only with no diversion of stormwater into the sewer system.

The following table shows the various pipeline sizes:

Pipe Diameter (Inches) Length (Feet)
Percent of Sewer
System
6 328,931 78.0%
8 52,332 12.4%
10 10,914 2.6%
12 7,610 1.8%
15 3,276 0.8%
16 360 0.1%
18 8,113 1.9%
21 5,412 1.3%
24 1,580 0.4%
27 2,970 0.7%
Total 421,498 100.0%
The following table shows pipeline materials:

Material Length (Feet) Percent of Sewer
System
Vitrified Clay Pipe (VCP) 148,837 35.32%
Lined VCP 99,672 23.65%
Polyvinyl Chloride (PVC) 70,127 16.64%
High Density
Polyethylene (HDPE)
100,077 23.75%
Reinforced Concrete
Pipe (RCP)
2,660 0.63%
Unknown (UNK) 125 0.03%
Total 421,373 100.00%
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Force Main data is also provided in the table below:

Force Main Year Built Size
(inches)
Material Length
(ft)
Length (miles)
Ralston Ranch 1996 6 PVC 650 0.12
Naughton 1994 6 PVC 450 0.09
Hastings 1970 6 ACP 1,200 0.23
Hiller 1953 10 ACP 1,300 0.25
1998 10 HDPE 500 0.09
Island Park 1989 8 PVC/CIP 3,484 0.66
Sports Complex 1988 2 PVC 250 0.05
San Juan 1977 12 DIP 5,000 0.95
North Road 2021 12 HDPE 3,100 0.59
Haskins 1982 6 DIP/ACP 1,600 0.30
El Camino 2021 4 HDPE 160 0.03
Total 17,694 3.35
The City serves a population of approximately 27,000¹ people. Sewer system customers are broken down as follows:

Type of Connection % of Total Connections
Residential 97%
Commercial 3%
Industrial 0%
Total 100%
A general overview showing the service area boundaries and assets is provided below. ¹ Population data from CIWQS Operational Report 2024.
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Data management for the operations and maintenance of the sewer systems is provided utilizing City Microsoft Outlook to schedule O&M tasks with hard copy records of maintenance activities archived in the Public Works computer system. These tasks and records includes map updates, sewer inspections, and maintenance. Additionally, the City utilizes “One View Notification” software to address inquiries and concerns identified from the public. This system is found on the City’s website: https://www.belmont.gov/services/report/report-a-problem.

Sewer laterals are owned, operated and maintained by individual property owners from the wye connection at the sewer main, back to each building. The City does not own or maintain any sewer laterals within the service area other than laterals on City owned property. 150
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ELEMENT 2 - ORGANIZATION
The Organization Element of the SSMP identifies City of Belmont (City) staff that are responsible for the management and implementation of this SSMP. This Element identifies staff’s responsibilities responding to sewer spill events, and meeting sewer spill reporting requirements.

The Legally Responsible Officials (LRO) are designated below to meet SWRCB requirements for completing and certifying sewer spill reports in the California Integrated Water Quality System (CIWQS).

This SSMP Element outlines the City organization, SSMP responsibilities of personnel, authorized representatives, and chains of communication for sewer spill response and reporting.

2.1 Regulatory Requirements
WDR Order No. 2022-0103-DWQ Attachment D 2 states:

The collection system agency’s SSMP must identify:
a) The name of the Legally Responsible Official defined in this Order; b) The position titles, telephone numbers, and email addresses for management, administrative, and maintenance positions responsible for implementing specific Sewer System Management Plan elements;
c) Organizational lines of authority; and
d) Chain of communication for reporting spills from receipt of complaint or other information, including the person responsible for reporting spills to the State and Regional Water Boards and other agencies, as applicable. (For example, county health officer, county environmental health agency, and State Office of Emergency Services.) WDR Order No. 2022-0103-DWQ Section 5.1 states:

The Enrollee shall designate a Legally Responsible Official that has authority to ensure the enrolled sanitary sewer system(s) complies with this Order and is authorized to serve as a duly authorized representative. The Legally Responsible Official must have responsibility over management of the Enrollee’s entire sanitary sewer system and must be authorized to make managerial decisions that govern the operation of the sanitary sewer system, including having the explicit or implicit duty of making major capital improvement recommendations to ensure long-term environmental compliance. The Legally Responsible Official must have or have direct authority over individuals that:
• Possess a recognized degree or certificate related to operations and maintenance of sanitary sewer systems, and/or
• Have professional training and experience related to the management of sanitary sewer systems, demonstrated through extensive knowledge, training and experience.

2.2 Responsible and Authorized Representatives
The name of the authorized representatives described in WDR Section 5.1 above is listed in Table 2-1:
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Table 2-1: City of Belmont Authorized Representatives
Name Title CIWQS Database
Nisha Patel Public Works Director Legally Responsible Official Brandon Tyler Public Works Services Manager Legally Responsible Official Tim Murray Sewer and Storm Field Supervisor Data Submitter

2.3 SSMP Program Implementation
An organization table showing the lines of authority for the City is described below in Table 2-2 and updated City Organization Chart which show lines of authority can be found in Appendix 2A.
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Table 2-2: City of Belmont Staff and Contract Staff with SSMP Responsibilities and Contact Information
Name and Title SSMP Responsibilities Contact Information City Council
Julia Mates
Mayor
Robin PangMaganaris
Vice Mayor
Tom McCune
Councilmember
Gina Latimerlo
Councilmember
Cathy Jordan
Councilmember
The City Council annually adopts a
budget in which funding would be
allocated for SSMP related tasks.

The City Council is also responsible
for considering and approving
updates to the City’s SSMP.

[email protected]
Nisha Patel
Public Works
Director
The Public Works Director directs
City Staff who manage all eleven (11)
SSMP Elements.

Office: (650) 595-7459
[email protected]
Scott Rennie
City Attorney
The City Attorney assists in the
management of Element 3, Legal
Authority.

Office: (650) 595-7408
[email protected]
Bozhena Palatnik
Senior Civil Engineer
The Senior Civil Engineer is
responsible for the overall
management of the SSMP and
specifically directs the implementation
of:
• Element 1 – Goal;
Office: (650) 595-7463
[email protected]
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Name and Title SSMP Responsibilities Contact Information • Element 2 – Organization;
• Element 3 – Legal Authority;
• Element 4 - Operation and
Maintenance Program;
• Element 5 – Design and
Performance Provisions;
• Element 6 – Spill Emergency
Response Plan;
• Element 7 – Pipe Blockage
Control Program;
• Element 8 – System
Evaluation, Capacity
Assurance and Capital
Improvement Plan;
• Element 9 – Monitoring,
Measurement, and Program
Modifications;
• Element 10 – SSMP Audits;
and
• Element 11 – Communication
Program
The Public Works Director is assisted
by Public Works Services Manager,
Field Supervisor and Operators to
manage and implement these
Elements. Names and contacts are
provided in this table.

Brandon Tyler Public Works
Services Manager (650) 595-
7464, [email protected]
Tim Murray – Sewer and Storm
Field Supervisor
(650) 637-2932,
[email protected]
Ryan Talavera – Public Works
Sewer Lead Worker (650) 830-
1526, [email protected]

2.4 Chain of Communication for Responding to Sewer Spills Sewer Spill reports typically begin with a call from an observer to the City Office or 911 dispatchers.

City of Belmont
Office Business Hours: (650) 595-7425,
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8am – 5:00, Monday through Friday, except Legal Holidays After Hours: 911
During the process of responding to a sewer spill, the following actions are taken as outlined in Figure 3-1 and described below to verify the report and ensure the safety of the public:

1. During business hours, Wastewater Operators receive the call from an observer, or after hours dispatch and obtains the location of concern and a description of the problem. The name and phone number of the caller is requested and documented if not anonymous for follow-up information.

2. After hours, On-Call Staff proceeds to the location to verify the report.

3. If a sewer spill is verified, the On-Call Staff notifies the Field Supervisor and proceeds to the described location. The Spill Emergency Response Plan (SERP) is initiated.

4. California Office of Emergency Services (CalOES) must be contacted within two (2) hours of a Category 1 or Category 2 Spill, when the Spill is over 1,000 gallons and reaches a drainage channel or surface water. The Central Coast Regional Water Quality Control Board (RWQCB) may also be notified as a courtesy or if warranted due t complications contacting OES.

Figure 2-1: Sewer Spill Response Chain of Command
Additional contact information for sewer spill response is provided in the table below:

After-hours
Contacts
Observer
Notifies City Office
(650) 595-7425
After Hours
Observer directed
to Call 911
Emergency Phone #
911
Wastewater Staff
Responds
On Call Staff is
contacted
Wastewater Staff
Mitigates Spill
Field Supervisor
(650) 830-1526
Compile CIWQS
Data:

On Call Staff and
Field Supervisor
Spill Notification & Reporting to
Appropriate Agencies
If additional
resources are
necessary
If no
additional
resources
are
necessary
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Call Location Contact Telephone Number
City Hall Public Works (650) 595-7425
Police Department Dispatch Center – (After Hours) (650) 595-7400 On-Call Personnel (24/7) – (After Hours)
(650) 678-0468 (primary cell) or
(650) 678-0486 (secondary cell)
On-call Sewer Service Truck (650) 222-4925
Field Supervisor (650) 637-2932 or (650) 222-6460
Public Works Services Manager (650) 595-7464 or (650) 222-5240 Public Works Director (650) 595-7459
SSMP Element 6 – Spill Emergency Response Plan contains a chain of communication for reporting Spills for use in the field by the Operations Staff in Figure 6—1 which is the same as Figure 2-1 above.

Sewer Spill notification is outlined in the City’s – Spill Emergency Response Plan. The contact information and notification requirements associated with notifying Cal OES and other applicable agencies, such as San Mateo County Environmental Health Division, are included in that SSMP Element.

Upon completion of containment and clean-up, the Field Supervisor initiates the Draft Sewer Spill Report in CIWQS.
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ELEMENT 3 - LEGAL AUTHORITY
The City of Belmont (City) maintains the legal authority for the sanitary sewer system in the City Municipal Code sections listed below. These Codes are on file at the City Office and can also be located on the City Website:
https://library.municode.com/ca/belmont/codes/code_of_ordinances?nodeId=CICO_CH21 SESEDI.

3.1 Regulatory Requirements
WDR Order No. 2022-0103-DWQ Attachment D 3 states:

The wastewater collection system agency must include copies or an electronic link to the Enrollee’s current sewer system use ordinances, service agreements and/or other legally binding procedures to demonstrate the Enrollee possesses the necessary legal authority to:
(a).Prevent illicit discharges into its sanitary sewer system from inflow and infiltration (I&I); unauthorized stormwater; chemical dumping; unauthorized debris; roots; fats, oils, and grease; and trash, including rags and other debris that may cause blockages;
(b).Collaborate with storm sewer agencies to coordinate emergency spill responses, ensure access to storm sewer systems during spill events, and prevent unintentional cross connections of sanitary sewer infrastructure to storm sewer infrastructure; (c). Require that sewer system components and connections be properly designed and constructed;
(d).Ensure access for maintenance, inspection, and/or repairs for portions of the service lateral owned and/or operated by the Enrollee;
(e).Enforce any violation of its sewer ordinances, service agreements, or other legally binding procedures; and
(f). Obtain easement accessibility agreements for locations requiring sewer system operations and maintenance, as applicable.

3.2 SSMP Sanitary Sewer System Legal Authority [WDR D 3 (a) – (f)] Table 3-1 below provides the mechanisms by which the City maintains the legal authorities required by the WDRs for public and private sewer systems. 157
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Table 3-1: City Legal Authority References
WDR Requirement City Code
D 3 (a) Prevent illicit
discharges into its sanitary
sewer system (examples
may include Inflow &
Infiltration (I/I), storm water,
chemical dumping,
unauthorized debris and cut
roots, etc.).

Chapter 21: Sewage and Sewage Disposal
o Section 21-7: Unpolluted Waste Prohibited
o Prohibitions: Section 21-151 through 21-160
D 3 (b) Collaborate with
storm sewer agencies to
coordinate emergency spill
responses, ensure access to
storm sewer systems during
spill events, and prevent
unintentional cross
connections of sanitary
sewer infrastructure to storm
sewer infrastructure
The City coordinates internally as necessary for any sewer spills that may impact any stormwater facilities as it has jurisdiction over sewer and stormwater systems. Cross
connections between sewer and stormwater are not allowed and are monitored by the City.

D 3 (c) Require that sewers
and connections be properly
designed and constructed;
Chapter 21: Sewage and Sewage Disposal
o Connection Permits, Fees and Expansion
Fund: 21-20 through 21-37
o Sewer Laterals: 21-210 through 21-217
Design and construction standards for public sewers are not incorporated into the City Codes; but are incorporated into contracts for rehabilitation and replacement of public sewers.

These standards are referenced in Element 5: Design and Performance Provisions.

D 3 (d) Ensure access for
maintenance, inspection, or
repairs for portions of the
lateral owned or maintained
by the Public Agency;
Chapter 21: Sewage and Sewage Disposal
o Property Owner Responsible for Installation
and Maintenance of Sewer Lateral: 21-210
o Regulations governing Connections
Authorized: 21-6
o Inspection and Sampling: 21-122
D 3 (e) Enforce any violation
of its sewer ordinances.

Chapter 21: Sewage and Sewage Disposal
o 21-133 through 21-144
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WDR Requirement City Code
Chapter 30 Administrative Enforcement
o 30-3 General Enforcement Authority
D 3 (f) Obtain easement
accessibility agreements for
locations requiring sewer
system operations and
maintenance, as applicable
Chapter 21: Sewage and Sewage Disposal
Article I – General
o 21-5 Easement Required to Connect Main
to City System
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Element 4 – Operation and Maintenance Program
City of Belmont
August 2025

ELEMENT 4 - OPERATION AND MAINTENANCE PROGRAM
The City of Belmont (City) provides sanitary sewer collection and conveyance services the City’s sewer system. The City service area consists of approximately 80 miles of gravity pipelines, which vary in diameter from 6-inch to 27-inches, 10 City-owned lift stations and 3.4 miles of force mains.

Approximately half of the existing collection system piping material is Vitrified Clay Pipe (VCP) or Lined VCP. The remaining portions of the system are a combination of PVC, HDPE, and RCP.

The majority of day-to-day operations and maintenance activities are conducted by City Staff.

This SSMP Element 4 outlines the work that is conducted to accomplish the optimal operation and maintenance of the City’s collection system.

A general overview of the City Sewer System is provided in Figure 4-1: Collection System Overview Map. Indexed pages to this map are located at City Public Works Office, Corporation Yard and in Service Trucks.

Figure 4-1: Collection System Overview Map
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The City owns and maintains ten (10) wastewater lift stations. Lift Stations locations are identified in the Sewer Atlas Map maintained at the City Public Works Office and illustrated on Figure 4-1 and in more detail in Figure 4-2 below.

Figure 4-2: Lift Station Location Map
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4.1 Regulatory Requirements
Attachment D 4. states:

The SSMP must include those sections listed below that are appropriate and applicable to the Enrollee’s system:
(a) Up-to-date map(s) of the sanitary sewer system, and procedures for maintaining and providing State and Regional Water Board staff access to the map(s). The map(s) must show gravity line segments and manholes, pumping facilities, pressure pipes and valves, and applicable stormwater conveyance facilities within the sewer system service area boundaries.;
(b) A scheduling system and a data collection system for preventive operation and maintenance activities conducted by staff and contractors. a. The scheduling system must include:
i. Inspection and maintenance activities;
ii. Higher-frequency inspections and maintenance of known problem areas, including areas with tree root problems;
iii. Regular visual and closed-circuit television (CCTV) inspections of manholes and sewer pipes.

The data collection system must document data from system inspection and maintenance activities, including system areas/components prone to root-intrusion potentially resulting in system backup and/or failure.
(c) In-house and external training provided on a regular basis for sanitary sewer system operations and maintenance staff and contractors. The training must cover:
i. The requirements of this General Order;
ii. The Enrollee’s Spill Emergency Response Plan procedures and practice drills;
iii. Skilled estimation of spill volume for field operators; and iv. Electronic CIWQS reporting procedures for staff submitting data. (d) An inventory of sewer system equipment, including the identification of critical replacement and spare parts.

4.2 Collection System and Storm Water Maps
The City has a Geographic Information System (GIS) that includes the information for its wastewater collection system assets. The GIS (ArcGIS) is managed by the City's Engineering Division, who is responsible for all appropriate updates, including adding any new system infrastructure constructed or accepted for maintenance by the City. The City also has information in its GIS for the storm drainage system, and all storm drains are included on hard copies of system maps utilized by staff. GIS information is not currently available in City maintenance vehicles other than in the service truck and CCTV van, but system maps are available in all field vehicles as well as in the office. GIS information is available on Lead Workers and Field Supervisors smart phones. City maps contain information about size, type, slope, condition, depth, age, and recent rehabilitation of the public sewer system. The City also has a database of older maps in hard copy, and digitized format of the wastewater collection system assets. The GIS is managed through IT and Public Works Departments who are responsible for all appropriate 162
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updates, including adding any new system infrastructure constructed or accepted for maintenance by the City.

Currently the field crews use hard copy maps that are produced from the GIS. The hard copy maps are updated as changes are identified upon acceptance of new facilities. Corrections that are identified by field crews are given verbally and by marked up paper maps to City Engineering, who in turn transmits the corrected maps to the field crews when the corrections are completed.

New facilities are incorporated into the maps during these updates.

The City owns and operates storm water conveyance facilities within their service area.

Stormwater system map information is also maintained in the GIS system. City staff is evaluating the need for and costs and benefits of using smart phones and tablet type equipment in all collection system vehicles to provide instant access to all maps of both the sanitary and storm water sewer systems. Stormwater maps can be printed as hard copy maps to be utilized by City maintenance staff in the event of a Sanitary Sewer Spill (Spill) to identify storm water inlets and outlets and isolate/capture wastewater that may enter the storm drain system. An overview map of the City MS4 System is provided in Figure 4-2 below:

Figure 4-2: Storm Drain Map

4.3 Preventative Maintenance Program
The City manages, schedules, and tracks preventative maintenance activities in an Microsoft Outlook based scheduling system with maintenance records reviewed and stored on the City’s internal server. The system covers the following:
o Sewer Line Cleaning
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o High Priority Area Cleaning and Inspections
o Manhole Inspections and Maintenance
o Lift Station Inspection and Maintenance
o Customer Complaints
o Work Orders
o CCTV Inspections
o FOG Program Inspections
Routine maintenance that requires follow up is flagged in the Outlook system with a “Follow up Maintenance Needed” code in the system. In addition to this preventative maintenance system, the City has a “One View Notification” system to receive and respond to customer inquiries and/or complaints regarding the sewer system.

4.3.1. CCTV Inspection
The City conducts CCTV inspections utilizing two (2) methods:
1) City Staff conducts reactive CCTV investigations on an ongoing basis as an investigative tool to identify problems identified in the field such as flow restriction, customer complaints, or as a result of line cleaning or sewer spill follow up investigations. 2) The City also conducts CCTV investigations as part of a planned system-wide CCTV investigation which is expected to be completed in the next five (5) years. This CCTV work is conducted monthly with approximately 20,000 linear feet of CCTV completed each month in different areas or basins within the City system as part of the systemwide ongoing condition assessment.

CCTV information will be one of the primary methods to identify sewer line rehabilitation and replacement projects in the future. Data will be evaluated on an ongoing basis to help develop City Capital Projects.

As CCTV investigations are completed, they will be analyzed to: identify, rank and prioritize areas of the sewer system that require rehabilitation and replacement. A summary of these CCTV investigations will be on file at the Public Works office when completed. A decision tree informing CCTV reinspection after initial inspection is provided below in Figure 4-2:
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Figure 4-2 CCTV Grades above based on NASSCO defect ranking codes Bridge and aerial crossings of gravity and force main lines are visually inspected on a quarterly basis. The findings of these inspections and any necessary preventive maintenance are reported to supervisorial staff.

4.3.2 Line Cleaning
The City implements a three (3) year schedule to clean the entire system. Staff is dedicated to cleaning the system five (5) days per week and documents line cleaning conditions on a Routine Sewer Line Cleaning and Manhole Inspection form. The line cleaning crew evaluates cleaning results and places line segments on these higher frequency schedules based upon past cleaning results, history of sewer spill events, history of cleaning results, video inspections, and professional judgment. Cleaning crews operate hydro jetting cleaning units and less frequently, hand rodding, to accomplish cleaning of lines.

The City also utilizes chemical root control to address root control issues in sewer mains. If roots are determined to be an issue during the annual sewer CCTV inspections, cleaning, or response to complaints, the City’s maintenance staff performs root cutting, and areas with a history of significant roots are placed into the root foaming program. The City currently spends about 165
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$75,000 annually on root foaming, treating these lines on a cycle of about once every three years.

This program involves approximately 55,000 linear feet of the City's sewer system.

The City evaluates the frequency at which the entire system is cleaned based on the results of sewer line cleaning logs, sewer spill history and the results of CCTV data. Changes in sewer line cleaning and prioritization of sewer repairs based on sewer line cleaning observations follow the following protocol in Figure 4-3 below:

Figure 4-3: Sewer Line Cleaning Flow Chart
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4.3.3 Manhole Inspection
City manholes are inspected in conjunction with routine sewer line cleaning activities, during CCTV inspections, and as part of the High Priority List inspections. The City utilizes a Manhole Inspection Form for routine documentation of manhole conditions when they are not inspected as part of CCTV investigations when conditions warrant documentation. When significant issues are observed during these routine manhole inspections, a more detailed inspection and assessment is conducted by maintenance staff. Relevant information from these sheets is maintained in a City computer server for consideration in future rehabilitation and/or CIP.

4.3.4 High Priority Areas
The Public Works Department goal is to service high priority problem areas on a three (3) and six (6) month schedule dependent on the nature of the specific section of the sewer system. The City’s sewer line cleaning crew maintains “high priority” lists of problem areas needing additional maintenance and cleaning. This list, developed over several years, identifies problem locations for blockages that may potentially lead to overflows. This list was developed and is based on the required frequency of maintenance to avoid blockages. These lists are based on sewer spill data and staff field observations. The list have been effective to minimize sanitary sewer spills. The locations are grouped by fifteen (15) different basins within the City’s sewer system.

4.3.5 Lift Station Operation and Maintenance
As previously mentioned in the introduction to this SSMP Element, the City operates ten (10) Cityowned lift stations within the City service area. Stations are provided with duplex and triplex pumping systems depending on the size of the station for redundancy and reliability. These redundant systems allow for continued operation of a lift station in the event of pump failure.

Several of the City’s lift stations have backup generator power. In addition, the City maintains two (2) portable (towable) diesel powered generators to provide emergency power to those stations not equipped with permanent on-site electrical generators. These portable generators are tested monthly to ensure reliability in an emergency. This gives effective coverage of all sanitary lift stations and reduces the potential for overflows during power outages.

To ensure redundancy in the system, City lift stations are equipped with receptacles for mobile generator hookups in the unlikely event of a permanent generator failure. Personnel from every division of maintenance have also been cross trained to deliver and connect emergency power to the pump stations. Stations are monitored remotely through a SCADA system which contacts “oncall” staff in the event of an emergency. Operational parameters and alarms for each station can be adjusted manually as necessary.

All pump stations are inspected on a weekly basis to ensure uninterrupted service. Such inspections include testing pumps, checking batteries and battery chargers, exercising valves and standby generators, cleaning wet well, clearing bar screens, lubricating locks and hardware, visual evaluation of the pump station elements.

Site visits for maintenance activities are logged in the Lift Station Log kept on file at the City’s Public Works office.

Table 4-2 lists City-owned lift stations and components in the City collection and conveyance system.
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Table 4-2 Lift Stations
City Owned Lift Stations
Name and
Location
Pumps &
GPM
Pump
Manufacturer
Pump
Horsepower
Generator
(kw)
Wet Well
Capacity
Ralston Ranch,
Ralston Ranch
Rd
2 pumps,
250 gpm
230
Paco 10 None 4,265 gallons
Naughton,
E. Naughton
Avenue
2 pumps:
1 spare pump,
230 gpm
Flygt 5 None 1,480 gallons
Hastings,
2600 block
Hastings Ave
2 pumps:
1 spare pump,
550 gpm
Homa 29 100 3,595 gallons
Hiller,
600 block Hiller
St
2 pumps:
1 spare pump,
850 gpm
Flygt 20 None 9,574 gallons
Island Park,
550 Island Pkwy
2 pumps:
1 spare pump,
300 gpm
Homa 10.4 33 6,333 gallons
Sports Complex,
301 Island Pkwy
2 pumps,
55 gpm
Flygt 2 None 2,872 gallons
San Juan,
3118 E. Laurel
Creek Rd.
2 pumps:
1 spare pump,
1000 gpm
ABS Sulzer 139.4 400 17,655
gallons
North Road,
North Rd. & El
Camino
3 pumps,
1400 gpm Flygt 20 100 8,210 gallons
Haskins,
Haskins Dr. & E.

Laurel Creek Rd.
2 pumps:
1 spare pump,
600 gpm
Homa 20 50 3,807 gallons
El Camino Real,
SE corner of El
Camino Real &
Harbor
2 pumps:
1 spare pump,
105 gpm
Myers 0.5 100 1,175 gallons

4.3.6 Customer Requests/Complaints
The City utilizes “One View Notification”, an online notification system to address customer inquiries and concerns. Staff investigates and completes associated sewer related tasks as appropriate in response to these notifications. If staff investigations result in significant discoveries in the field (ex: sewer line restriction or spill) relevant data is reported to the Supervisor for followup. 168
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4.4 Training
Training programs include formal classroom, tailgate training, and on-the-job training. Training is facilitated by both City staff and outside training workshops. On-the-job cross training is pursued to ensure staff has a proficient working knowledge of the sanitary sewer system and that critical tasks can be performed without interruption. Task proficiency is a requirement for all job positions and promotions. Operations and Maintenance (O&M) related training is conducted on an ongoing and as needed basis. O&M staff are initially trained in the proper operation and maintenance of all major new mobile equipment and facilities by the respective contractor or manufacturer.

The City highly recommends its wastewater collection system employees be certified in Collection System Maintenance by the California Water Environment Association (CWEA) and provides training opportunities to enable all sewer maintenance staff to become and remain certified. The City assists with certification by paying for the preparation course, certification exams, and required continuing education. Training programs that the City uses are listed below:
o CWEA
o APWA
o NASSCO PACP
o Vendor sponsored training
o In-house training by supervisor and lead workers
o Cross training exercises related to emergency responses during power outages and spills
o Training exercises with neighboring cities
o City Standard Operation Procedures (SOPs) for Operations and Maintenance:
• Manhole Cover Removal Procedure
• Temporary Traffic Control - Traffic Flagger
• Gas Meter
• USA Alerts - Utility Locating
• Altec Boom Truck Operation
• Backhoe Operation
The City also conducts regular training in the following areas:
o The requirements of General Order WQ 2022-0103-DWQ;
o Spill Emergency Response Plan procedures and practice drills; o Estimation of spill volume and spill response/mitigation; and o Electronic CIWQS reporting procedures for staff submitting data.

The City’s standard service and construction contract language requires all contractors working in the wastewater collection system to submit the Contractors SERP for City review prior to starting work on or near the wastewater collection system. The City is considering changes to its standard specifications to ensure these requirements are met and fully in place prior to commencing construction.

Training records are maintained at the Public Works Office. 169
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4.5 Equipment and Replacement Parts Inventory
Equipment and replacement parts inventories are provided as discussed below.

4.5.1 Critical Parts and Equipment
The City maintains an inventory of critical parts and equipment which are utilized for both routine and emergency operations. A critical parts and equipment list is maintained in the office of the Public Works Department. In the event of an emergency, local retailers and contractors are available to supply additional equipment and parts on short notice.

The following is a list of current contingency parts and equipment. This is a dynamic list which changes regularly.

The City of Belmont sewer department contains the following equipment:
o 12-yard combination sewer cleaner truck with spill response kit o 9-yard combination sewer cleaner truck with spill response kit o Service truck equipped for sewer call/spill response
o CCTV camera van – 4” to 36” inch pipe diameter capability o Backhoe
o 1 Excavator
o Skid steer
o Truck with 4,000-pound crane (221 sewer/storm truck)
o Truck with 6,000-pound crane (217 boom truck)
o Pipe locator
o Two lateral line cameras
o Portable sewer jetting machine
o 500 feet of hand rods
o Various size cutting augers for hand rods
o Various size and style cleaning/cutting nozzles for combination sewer cleaner trucks o Various size pipe plugs 6”- 30”
o Portable bypass pumps ranging from 2” to 6” including one trailer mounted bypass pump. o Bypass pump suction and discharge hose of various diameter and length o Trailer mounted 800 GPM bypass pump capable of running all but one of our sewer pump stations and can for run for 24 hours straight on one tank of fuel o Portable Emergency generators, one Kohler 80 kw and one Kohler 33 kw o Emergency response trailer equipped with spill response kits, pumps, maps, pipe plugs, lights
o Confined space equipment
o Shoring equipment
o Spill containment kits
o Water sampling test kit
o Supply of pipe, fittings, and bands
o Pipe patch kits (cure in place)
o Manholes lids and rings
o Various small hand and power tools
o Gantry crane for pumps
o Spare pumps for 8 sewer pump stations and pump repair kits for all sewer stations o Spare soft starts, fuses, circuit breakers, relays, check valves, Milltronics controller, transducer, floats, and power supplies for pump stations 170
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o 9-yard dump truck
o 9-yard dump truck
o Smoke testing equipment
All sewer maintenance equipment and spare replacement parts are stored at the City’s Municipal Corporation Yard. Equipment and parts are periodically replaced based on condition and remaining life. The City maintains an inventory of spare/replacement parts to minimize system downtime in the event of an unplanned failure. In addition to these parts, the City maintains an emergency list of vendors for parts and services in Appendix 4A. 171
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ELEMENT 5 - DESIGN AND PERFORMANCE PROVISIONS
The standards and specifications for new construction and repair of the existing sanitary sewer system described in this SSMP Element are utilized to ensure a high quality, well designed, and functioning sanitary sewer system.

5.1 Regulatory Requirements
WDR Order No. 2022-0103-DWQ Section D 5 states that the SSMP must identify:
(a) Updated design criteria, and construction standards and specifications, for the construction, installation, repair, and rehabilitation of existing and proposed system infrastructure components, including but not limited to pipelines, pump stations, and other system appurtenances. If existing design criteria and construction standards are deficient to address the necessary componentspecific hydraulic capacity as specified in section 8 (System Evaluation, Capacity Assurance and Capital Improvements), the procedures must include componentspecific evaluation of the design criteria.; (b) Procedures, and standards for the inspection and testing of newly constructed, newly installed, repaired, and rehabilitated system pipelines, pumps, and other equipment and appurtenances

5.2 Design and Construction Standards and Specifications The City has established standards for both new construction and renewal and replacement work associated with the sewer collection and conveyance system. These standards are commonly referred to in the industry as the “Green Book” and are referenced on the City's website at: https://www.belmont.gov/departments/public-works/standard-details.

The standards apply to both new construction and rehabilitation and repair of all main lines sewers, trunk sewers, manholes, pump stations and other collection system appurtenances.

The Green Book standards are revised every three years and the most recent edition currently in effect is the 2024 edition.

In 2022, the City adopted Details for the sewer system to provide minimum standards for the design, methods of construction, kinds and uses of materials, and the preparation of plans for construction, sewer appurtenances, road repair and facilities within the City service area.

The 2022 Design Standards include:
▪ Sewer Laterals
▪ Manholes
▪ Manhole Sealants
▪ Grade Rings, Covers and Frames
▪ Backflow Device
▪ Drop Manholes
▪ Lampholes/Cleanouts
▪ Manhole Abandonment
▪ Pipe Bursting: laterals
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▪ Force Main Access Structures
▪ Spot Repairs
All work must be completed based on the above standards. Any alterations to this must be approved by the City Engineer. All new and rehabilitated lift stations are required to be designed by a registered engineer in accordance with Greenbook Standards.

5.3 Inspection and Testing Procedures and Standards
The City’s Wastewater Collection System Inspection and Testing Criteria are based on the Green Book standards. All new gravity sewers will be periodically inspected during construction to ensure that the sewer is constructed using the specified materials and methods, and in accordance with Green Book standards, Parts 1, 2, 3 and 5. Inspection during construction, leakage, deflection, CCTV inspection, functional and performance testing are all inspection and testing methods utilized by the City.
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ELEMENT 6 - SPILL EMERGENCY RESPONSE PLAN
Sanitary Sewer Spills (Spills), or spills, can occur due to unforeseen accidents, unusual equipment failures, or other events not controllable by the City. A Spill response plan is maintained by the City Public Works Office and Maintenance Yard for City maintenance personnel to use as guidance in responding to Spills. The Spill response plan defines procedures to:
▪ protect public health and the environment
▪ comply with local, state, and federal regulatory agency requirements ▪ protect City personnel, the wastewater collection system, and private and public properties
The Spill Emergency Response Plan (SERP) is summarized in this SSMP Element. The City has developed a comprehensive Spill Emergency Response Plan to address emergency response and follow activities for Spills experienced in the City’s collection and conveyance system. The City also maintains a separate Emergency Response Plans for the individual Lift Stations. These response plans are kept on file at the City Public Works office. These documents are the primary references for staff to use during all Spills.

6.1 Regulatory Requirements
WDR Order No. 2022-0103-DWQ Attachment D 6 states:

The Plan must include an up-to-date Spill Emergency Response Plan to ensure prompt detection and response to spills to reduce spill volumes and collect information for prevention of future spills. The Spill Emergency Response Plan must include procedures to:
a) Notify primary responders, appropriate local officials, and appropriate regulatory agencies of a spill in a timely manner;
b) Notify other potentially affected entities (for example, health agencies, water suppliers, etc.) of spills that potentially affect public health or reach waters of the State;
c) Comply with the notification, monitoring and reporting requirements of this General Order, State law and regulations, and applicable Regional Water Board Orders;
d) Ensure that appropriate staff and contractors implement the Spill Emergency Response Plan and are appropriately trained;
e) Address emergency system operations, traffic control and other necessary response activities;
f) Contain a spill and prevent/minimize discharge to waters of the State or any drainage conveyance system;
g) Minimize and remediate public health impacts and adverse impacts on beneficial uses of waters of the State;
h) Remove sewage from the drainage conveyance system;
i) Clean the spill area and drainage conveyance system in a manner that does not inadvertently impact beneficial uses in the receiving waters; 174
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j) Implement technologies, practices, equipment, and interagency coordination to expedite spill containment and recovery;
k) Implement pre-planned coordination and collaboration with storm drain agencies and other utility agencies/departments prior, during, and after a spill event; l) Conduct post-spill assessments of spill response activities; m) Document and report spill events as required in this General Order; and n) Annually, review and assess effectiveness of the Spill Emergency Response Plan, and update the Plan as needed.

6.2 Initial Spill Notification Procedures
If a member of the public witnesses a Spill, they contact City On Call Staff by way of the City Office at (650) 595-7425 during normal business hours. Calls to the City after hours or on weekends and holidays are directed to Police Dispatch (650) 595-7400 which contacts staff responsible for “On-Call” duty. If office personnel are not available during normal work hours, a voicemail directs the caller to call the sewer truck directly at (650) 222-4925.

6.2.1 The City Staff as the First Responder
If City Staff is contacted during normal business hours Monday through Friday, excluding legal holidays, administrative staff at the City Office, calls the Supervisor or the next available Wastewater Staff to investigate the situation utilizing the contact information found in the SERP.

If City Staff needs assistance responding to the Spill, the first responder calls additional Wastewater staff utilizing the information found in Table 6-1.

Table 6-1: Maintenance Staff Contact Information
Title Contact Number
Public Works Services
Manager Brandon Tyler (650) 595-7464 or (650) 222-5240
Field Supervisor Tim Murray (650) 637-2932 or
(650) 222-6460
Lead Maintenance Worker Ryan Talavera (650) 830-1526
Maintenance Staff / On Call
Responder
On-Call Personnel (24/7 After hours)
Primary:
(650) 678-0468
Secondary:
(650) 678-0486
On Call Phone Sewer Service Truck (650) 222-4925
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If City staff are contacted after normal business hours, on a holiday, or during the weekend, On-Call maintenance staff are contacted by dialing the City Office or 911. The call will be routed to Belmont Police Dispatch who contacts the City On-Call phone, and staff responds accordingly.

After normal operating hours, one member of the Wastewater Staff is on-call as a primary oncall wastewater emergency responder.

The Sewer Spill Reporting Chain of Command follows the flowchart shown in the Belmont Public Works Department Organization Chart and the SERP Sewer Backup Response Flowchart (B-1). Reporting process and responsibilities are described in detail in the Spill Emergency Response Plan.

6.3 Spill Response Program
The City SERP documents provide a comprehensive Emergency Response Program consisting of the following:
o Spill Detection and Notification
o Spill Response Procedures
o Spill Recovery and Cleanup
o Water Quality Monitoring/Sampling
o Private Property Spill Response Procedures
o Notification, Reporting and Record Keeping Requirements o Post Spill Debriefing / Failure Analysis Investigation o Spill Response Training (training records maintained at City office) o Spill Response Workbook
Additionally, the City maintains Lift Station Emergency Response Procedures for each of the City’s Lift Stations which are kept on file at the City Maintenance Yard Office.

6.4 Spill Notification and Reporting Procedures
This section of the SERP ensures proper notification and reporting of Spills, which occur in the City’s sanitary sewer system, to protect public and environmental health.

An overview of the notification and reporting process is illustrated on the following page in Table 6-1. This overview is not inclusive of all the notification and reporting requirements and procedures. The following section of this SSMP Element corresponding to each Spill category for notifications and reporting must be referenced and followed. 176
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Spill Category 1:

Spills to Surface Waters and/or SW Conveyance System
Spill
Requirement Schedule Method
Notification
Within two (2) hours of the Enrollee’s knowledge of a
Category 1 spill of 1,000 gallons or greater, discharging or threatening to discharge to surface waters:

Notify the California Office of Emergency
Services and obtain a notification control
number.

California
Office of
Emergency
Services at:
(800) 852-
7550
Reporting
• Submit Draft Spill Report within three (3) business
days of the Enrollee’s knowledge of the spill;
• Submit Certified Spill Report within 15 calendar
days of the spill end date;
• Submit Technical Report within 45 calendar days after the spill end date for a Category 1 spill in which 50,000 gallons or greater discharged to surface waters; and
• Submit Amended Spill Report within 90 calendar days
after the spill end date.

CIWQS
Spill Category 2:

Spills of 1,000 Gallons of Greater That Do Not Discharge to Surface Waters Spill
Requirement Schedule Method
Notification
Within two (2) hours of the Enrollee’s knowledge of a
Category 2 spill of 1,000 gallons or greater, discharging or threatening to discharge to waters of the State:

Notify California Office of Emergency Services and obtain a notification control number.

California Office
of Emergency
Services at:
(800) 852-7550
Reporting
• Submit Draft Spill Report within three (3) business
days of the Enrollee’s knowledge of the spill;
• Submit Certified Spill Report within 15 calendar
days of the spill end date; and
• Submit Amended Spill Report within 90 calendar
days after the spill end date.

CIWQS
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Spill Category 3:

Spills of Equal or Greater than 50 Gallons and Less than 1,000 Gallons That Does Not Discharge to Surface Waters
Spill
Requirement Schedule Method
Notification

Not Applicable Not Applicable
Reporting
• Submit monthly Certified Spill Report to the online
CIWQS Sanitary Sewer System Database within 30
calendars days after the end of the month in which
the spills occur; and
• Submit Amended Spill Reports within 90 calendar
days after the Certified Spill Report due date.

CIWQS
Spill Category 4:

Spills Less Than 50 Gallons That Do Not Discharge to Surface Waters Spill
Requirement Schedule Method
Notification Not Applicable Not Applicable
Reporting
• If, during any calendar month, Category 4 spills occur, certify monthly, the estimated total spill volume exiting the sanitary sewer system, and the total number of all
Category 4 spills into the online CIWQS Sanitary
Sewer System Database, within 30 days after the end
of the calendar month in which the spills occurred.
• Upload and certify a report, in an acceptable digital format, of all Category 4 spills to the online CIWQS
Sanitary Sewer System Database, by February 1st
after the end of the calendar year in which the spills
occur.

CIWQS
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Enrollee Owned and/or Operated Lateral Spills That Do Not Discharge to Surface Waters Spill
Requirement Schedule Method
Notification
Within two (2) hours of the Enrollee’s knowledge of a spill of 1,000 gallons or greater, from an enrollee- owned and/or operated lateral, discharging or threatening to discharge to waters of the State:

Notify California Office of Emergency Services and
obtain a notification control number.

Not applicable to a spill of less than 1,000 gallons.

California
Office of
Emergency
Services at:
(800) 852-
7550
Reporting
• Upload and certify a report, in an acceptable digital format, of all lateral spills (that do not discharge to a surface water) to the online CIWQS Sanitary Sewer
System Database, by February 1st after the end of the
calendar year in which the spills occur.
• Report a lateral spill of any volume that discharges to a surface water as a Category 1 spill.

CIWQS
Table 6-1: Spill Notification and Reporting Overview

6.4.1 Spill Notification Procedure
Spill notification procedures vary based on whether the Spill is classified as a Category 1, Category 2, Category 3, Category 4 or Enrollee Owned Lateral and are the SERP: Spill Notification section.

Notification of Spills of 1,000 Gallons or Greater to the California Office of Emergency Services
Per Water Code section 13271, for a spill that discharges in or on any waters of the State, or discharges or is deposited where it is, or probably will be, discharged in or on any waters of the State, the City shall notify the California Office of Emergency Services and obtain a California Office of Emergency Services Control Number as soon as possible but no later than two (2) hours after:
• The City has knowledge of the spill; and
• Notification can be provided without substantially impeding cleanup or other emergency measures.

The notification requirements in this section apply to individual spills of 1,000 gallons or greater, from an Enrollee-owned and/or operated laterals, to a water of the State.
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Spill Notification Information
The Enrollee shall provide the following spill information to the California Office of Emergency Services before receiving a Control Number, as applicable:
• Name and phone number of the person notifying the California Office of Emergency Services;
• Estimated spill volume (gallons);
• Estimated spill rate from the system (gallons per minute); • Estimated discharge rate (gallons per minute) directly into waters of the State or indirectly into a drainage conveyance system; • Spill incident description:
o Brief narrative of the spill event, and
o Spill incident location (address, city, and zip code) and closest cross streets and/or landmarks;
• Name and phone number of contact person on-scene;
• Date and time the Enrollee was informed of the spill event; • Name of sanitary sewer system causing the spill;
• Spill cause or suspected cause (if known);
• Amount of spill contained;
• Name of receiving water body receiving or potentially receiving discharge; and
• Description of water body impact and/ or potential impact to beneficial uses.

Notification of Spill Report Updates
Following the initial notification to the California Office of Emergency Services and until such time that the Enrollee certifies the spill report in the online CIWQS Sanitary Sewer System Database, the Enrollee shall provide updates to the California Office of Emergency Services regarding substantial changes to:
• Estimated spill volume (increase or decrease in gallons initially estimated);
• Estimated discharge volume discharged directly into waters of the State or indirectly into a drainage conveyance system (increase or decrease in gallons initially estimated); and
• Additional impact(s) to the receiving water(s) and beneficial uses. 180
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6.4.1.1 Category 1 Spills (Spills to Surface Waters)
Within two (2) hours of the City’s knowledge of a Category 1 spill of 1,000 gallons or greater, discharging or threatening to discharge to surface waters:
o Notify the California Office of Emergency Services and obtain a notification control number.

Table 6-2: Regulatory Agency Notification Information for a Spill to Surface Water Regulatory Agency Contacts
California Office of
Emergency
Services (Cal OES)
Within two (2) hours of the City’s knowledge of a Category 1 spill of 1,000 gallons or greater, discharging or threatening to discharge to surface waters notify the California Office of Emergency Services and obtain a notification control number at (800) 852-7550 Regional Water
Quality Control
Board (RWQCB)
Optional – If spill is over 1,000 gallons, reaches waterway, or occurred in area with likely public contact, call (510) 622-2300.

San Mateo County
Environmental
Health
Optional- If spill reaches waterway, call (888) 442-2666. Give the spill information.

California
Department of Fish
and Wildlife
Optional -If spill reaches waterway, call state office (707) 428-2002 or (209) 234-3420.

6.4.1.2 Category 2 Spills
(Spills of 1,000 Gallons or Greater That Do Not Discharge to Surface Waters) Within two (2) hours of the City’s knowledge of a Category 2 spill of 1,000 gallons or greater, discharging or threatening to discharge to waters of the State:
o Notify California Office of Emergency Services and obtain a notification control number.

6.4.1.3 Category 3 Spills
(Spills of Equal or Greater than 50 Gallons and Less than 1,000 Gallons That Does Not Discharge to Surface Waters)
o Not Applicable

6.4.1.4 Category 4 Spills
(Spills Less Than 50 Gallons That Do Not Discharge to Surface Waters) o Not Applicable

6.4.1.5 Enrollee Owned and or Operated Lateral Spills that do not Discharge to Surface Waters
Within two (2) hours of the City’s knowledge of a spill of 1,000 gallons or greater, from an enrollee- owned and/or operated lateral, discharging or threatening to discharge to waters of the State:
o Notify California Office of Emergency Services and obtain a notification 181
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control number.
o Not applicable to a spill of less than 1,000 gallons.

6.4.2 Spill Reporting Procedure
Spill reporting procedures vary based on whether the Spill is classified as Category 1, Category 2, Category 3, Category 4 or City Owned Lateral. A full description of Spill reporting requirements is found in the City SERP.

Category 1 Spills
• Submit Draft Spill Report within three (3) business days of the City’s knowledge of the spill;
• Submit Certified Spill Report within 15 calendar days of the spill end date; • Submit Technical Report within 45 calendar days after the spill end date for a Category 1 spill in which 50,000 gallons or greater discharged to surface waters; and • Submit Amended Spill Report within 90 calendar days after the spill end date.

Spill Technical Report
Category 2 Spills
• Submit Draft Spill Report within three (3) business days of the City’s knowledge of the spill;
• Submit Certified Spill Report within 15 calendar days of the spill end date; and • Submit Amended Spill Report within 90 calendar days after the spill end date.

Category 3 Spills
• Submit monthly Certified Spill Report to the online CIWQS Sanitary Sewer System Database within 30 calendars days after the end of the month in which the spills occur; and
• Submit Amended Spill Reports within 90 calendar days after the Certified Spill Report due date.

Category 4 Spills
• If, during any calendar month, Category 4 spills occur, certify monthly, the estimated total spill volume exiting the sanitary sewer system, and the total number of all Category 4 spills into the online CIWQS Sanitary Sewer System Database, within 30 days after the end of the calendar month in which the spills occurred.
• Upload and certify a report, in an acceptable digital format, of all Category 4 spills to the online CIWQS Sanitary Sewer System Database, by February 1st after the end of the calendar year in which the spills occur.
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Enrollee Owned and/or Operated Lateral Spills That Do Not Discharge to Surface Waters
• Upload and certify a report, in an acceptable digital format, of all lateral spills (that do not discharge to a surface water) to the online CIWQS Sanitary Sewer System Database, by February 1st after the end of the calendar year in which the spills occur. • Report a lateral spill of any volume that discharges to a surface water as a Category 1 spill.

6.5 SERP Training
The City implements a formal training program which will include annual training of City Staff on this SSMP Element and SERP. The City will also require contractor personnel to train on and follow SERP through their contracts. The City will maintain a log of SERP Training as training is completed.

6.6 Spill Impact Mitigation Program
The Spill Mitigation Program is comprised of the mitigation practices contained in the SERP, which is on file at the City Public Works Office.

The SERP includes Water Quality Monitoring, Beneficial Uses identification and Spill Impact Mitigation section providing information to post water body warning and closure signs in the event that a spill reaches a surface water, and City Department of Public Works conducts water quality sampling for the spill impact assessment.

6.7 Spill Coordination with Stormwater Management Agencies and Public Water Systems
City Public Works manages the MS4 Stormwater Program which includes the entire City service area. Maps of the stormwater collection and conveyance system are available to City staff which allows them to isolate any areas impacted by a sewer spill, recover this wastewater and return it to the sewer system. Municipal water system contacts are identified for notification of spills that may occur within 1000 ft of a surface water intake in the City SERP.

6.8 Post Spill Investigations
The City conducts Post Spill Investigations for Cat 1, 2, 3, and 4 spills as warranted per instructions in Section 11 of the 2023 SERP.
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ELEMENT 7 – PIPE BLOCKAGE CONTROL PROGRAM
The City of Belmont has identified a significant number of commercial facilities that contribute fats, oils and grease (FOG) into the City’s sewer system. FOG has been a contributing factor in sanitary sewer spills and requires the City to conduct additional maintenance. Roots and disposable wipes have also been identified as pipe blocking sources.

7.1 Regulatory Requirements
WDR Order No. 2022-0103-DWQ Attachment D 7 states:

The Sewer System Management Plan must include procedures for the evaluation of the Enrollee’s service area to determine whether a sewer pipe blockage control program is needed to control fats, oils, grease, rags and debris. If the Enrollee determines that a program is not needed, the Enrollee shall provide justification in its Plan for why a program is not needed. The procedures must include, at minimum:
(a).An implementation plan and schedule for a public education outreach program that promotes proper disposal of pipe blocking substances; (b).A plan and schedule for the disposal of FOG generated within the sanitary sewer system service area. This may include a list of acceptable disposal facilities and/or additional facilities needed to adequately dispose of FOG generated within a sanitary sewer system service area;
(c). The legal authority to prohibit discharges to the system and identify measures to prevent spills and blockages;
(d).Requirements to install grease removal devices (such as traps or interceptors) and the development of design standards for such devices, maintenance requirements, BMP requirements, record keeping and reporting requirements; (e).Authority to inspect grease producing facilities, enforcement authorities, and whether the City has sufficient staff to inspect and enforce the FOG ordinance; (f). An identification of sewer system sections subject to FOG blockages and establishment of a cleaning maintenance schedule for each section; and Implementation of source control measures for all sources of fats, oils, and grease reaching the sanitary sewer system for each section identified above

7.2 Pipe Blockage Control Program Public Education and Outreach The City of Belmont service area includes a variety of residential and commercial facilities. The focus of an effective Pipe Blockage Control Program includes residential customers and commercial facilities.

The City conducts outreach and educational efforts utilizing the following documents which can be found on the City website:
o FOG Program Outreach Packet which consists of the following information for commercial facilities:
▪ FOG Program Description
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▪ FOG Best Management Practices
▪ FOG Application
▪ Grease Hauling Companies
o Residential FOG Outreach regarding how to properly dispose of FOG: “Don’t Let Your Sewer Turn On You or Your Neighbors”.
o “Wipes Clog Pipes Flyer” educating all facilities on items that cause problems in the City sewer system and are prohibited from being discharged to the City sewer system o “Don’t Let Roots Wipes and FOG Cause Sewer Problems” information on Website Copies of educational outreach documents for food service establishments are posted and available on the City’s website https://www.belmont.gov/departments/public-works/operationsmaintenance/sewer. The City refers the appropriate businesses to the available information, to assist them with FOG compliance.

7.3 FOG Disposal Facilities
The City does not own nor operate a FOG disposal facility; however, licensed FOG hauling contractors are identified as part of the City’s FOG Pipe Blockage Control Program, and the City provides a list of these licensed haulers to each food service establishment (FSE).

A list of grease trap and interceptor vendors, pumping and waste hauling contractors in the City service area that haul FOG to licensed facilities for disposal is available in Table 7-1 below.

Table 7-1: FOG Pumping Contractors

7.4 Discharge Prohibition Legal Authority and Spill Prevention Measures The legal authority to prohibit discharges to the collection system and identify measures to prevent FOG-caused sewer spills is found in the City’s Municipal Code, Chapter 21, Sewage and Sewage Disposal.

Table 7-1 summarizes where the City has established the legal authorities to prohibit FOG discharges and where measures are identified to prevent sewer spills and blockages caused by FOG.

Grease Haulers Servicing San Mateo County
Liquid Environmental Solutions (866) 694-7327
Caccia Plumbing (650) 294-8596
Ramos Environmental (850) 456-7745
The Grease Company (562) 999-2015
A1 Tank Service (510) 886-4455
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Table 0-1: City of Belmont FOG Legal Authority
WDR Requirement City of Belmont Municipal Code Section
Prohibit illicit discharges
to collection system
▪ Chapter 21 Sections:
o Section 21-7: Unpolluted Waste Prohibited
o Prohibitions: Section 21-151 through 21-160
Identify measures to
prevent Spills and
blockages caused by
FOG
▪ Chapter 21 Sections:
o Prohibitions: Section 21-151 through 21-160
▪ Division 3 Enforcement
o Sections 21-133 through 21-144

7.5 Requirements to Install Grease Removal Devices
The table below summarizes where the City has established the legal authorities to meet the above FOG Program requirements.

Table 0-2: Grease Removal Device Design, Installation, and Maintenance Requirements WDR Requirement City of Belmont Municipal Code Section
FSE to Install Grease
Removal Device
Division 6 – Plumbing Code
Grease Removal
Devices – Design
Standards
Division 6 – Plumbing Code
Authority to inspect
grease producing
facilities, enforcement
authorities,
Chapter 21: Section 21-122 Inspection and Sampling

7.6 FOG Control Program Inspection, Enforcement, and Staffing The City recently reestablished their Fats, Oils and Grease (FOG) Control Program in 2025. The FOG Program is planned to consist of the following:
o FOG Program Database Development
o Commercial and Residential Outreach
o Commercial Food Service Establishment FOG Program Applications and Permitting o FOG Program Inspections and Reinspection for facilities that are out of compliance with the City’s FOG Program requirements
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The City plans to utilize contracted and in-house inspection staff for food service facility inspection. These inspections are planned to start in the second half of 2025. The City will maintain records of inspections, permits and an ongoing database to support this program.

7.7 Problem Area Identification and Sewer Cleaning
Locally, grease from both residential areas and food preparation facilities have been found to be contributing factors to grease related blockages in the sanitary sewer system. System blockages are generally attributable to issues of grease, roots or an accumulation of system solids and debris.

The City has a proactive maintenance program to meet the WDR requirement to identify sections of the sewer system subject to grease blockages and establish a cleaning maintenance schedule for these locations.

The Public Works Department performs daily maintenance activities to the system. The City has developed a proactive maintenance program with the goal of performing routine maintenance five (5) days each week and High Priority List locations on a three (3) and six (6) month schedule.

The “High Priority List” referenced in Element 4 is the maintenance schedule that the City of Belmont uses for ongoing maintenance of areas that have a history of blockages, buildup or overflows. The list is a dynamic document that changes as problems in some pipeline sections and other sections are identified for additional maintenance. The list consists of both semiannual and quarterly maintenance locations to prevent the potential for sanitary sewer spills.

The criteria for being on the list varies depending on the history of grease buildup, root intrusion, hydraulic deficiencies or other causes. Each location/pipe segment has been placed on a schedule of semi-annual or quarterly cleaning based on spill history or other system problems.

Other maintenance activities include routine maintenance to sewer lines, manhole inspections, and system repairs when needed. The city also operates a pipeline inspection video truck to assist with identifying system problems.
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ELEMENT 8 SYSTEM EVALUATION, CAPACITY ASSURANCE AND

CAPITAL IMPROVEMENT PLAN

8.1 Regulatory Requirements
Attachment D 8 states:

The Plan must include procedures and activities for:
• Routine evaluation and assessment of system conditions; • Capacity assessment and design criteria;
• Prioritization of corrective actions; and
• A capital improvement plan.
(a).System Evaluation & Condition Assessment: The Plan must include procedures to:
o Evaluate the sanitary sewer system assets utilizing the best practices and technologies available;
o Identify and justify the amount (percentage) of its system for its condition to be assessed each year;
o Prioritize the condition assessment of system areas that:
▪ Hold a high level of environmental consequences if vulnerable to collapse, failure, blockage, capacity issues, or other system deficiencies; ▪ Are located in or within the vicinity of surface waters, steep terrain, high groundwater elevations, and environmentally sensitive areas; o Are within the vicinity of a receiving water with a bacterial-related impairment on the most current Clean Water Act section 303(d) List;
o Assess the system conditions using visual observations, video surveillance and/or other comparable system inspection methods;
o Utilize observations/evidence of system conditions that may contribute to exiting of sewage from the system which can reasonably be expected to discharge into a water of the State;
o Maintain documents and recordkeeping of system evaluation and condition assessment inspections and activities; and
o Identify system assets vulnerable to direct and indirect impacts of climate change, including but not limited to: sea level rise; flooding and/or erosion due to increased storm volumes, frequency, and/or intensity; wildfires; and increased power disruptions.
(b).Capacity Assessment & Design Criteria: The Plan must include procedures to identify system components that are experiencing or contributing to spills caused by hydraulic deficiency and/or limited capacity, including procedures to identify the appropriate hydraulic capacity of key system elements for:
o Dry-weather peak flow conditions that cause or contributes to spill events; o The appropriate design storm(s) or wet weather events that causes or contributes to spill events;
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o The capacity of key system components; and
o Identify the major sources that contribute to the peak flows associated with sewer spills.
o The capacity assessment must consider:
▪ Data from existing system condition assessments, system inspections, system audits, spill history, and other available information; ▪ Capacity of flood-prone systems subject to increased infiltration and inflow, under normal local and regional storm conditions;
▪ Capacity of systems subject to increased infiltration and inflow due to larger and/or higher-intensity storm events as a result of climate change; ▪ Increases of erosive forces in canyons and streams near underground and above- ground system components due to larger and/or higher-intensity storm events;
▪ Capacity of major system elements to accommodate dry weather peak flow conditions, and updated design storm and wet weather events; and ▪ Necessary redundancy in pumping and storage capacities. (c). Prioritization of Corrective Action: The findings of the condition assessments and capacity assessments must be used to prioritize corrective actions. Prioritization must consider the severity of the consequences of potential spills. (d).Capital Improvement Plan: The capital improvement plan must include the following items:
o Project schedules including completion dates for all portions of the capital improvement program;
o Internal and external project funding sources for each project; and o Joint coordination between operation and maintenance staff, and engineering staff/consultants during planning, design, and construction of capital improvement projects; and Interagency coordination with other impacted utility agencies.

8.2 System Evaluation & Condition Assessment
In 2024 the City completed the Sanitary Sewer Master Plan Update (SSMPU) was completed that included evaluation of the entire City sanitary sewer system. The condition assessment consisted of the following:
o Flow monitoring wet and dry weather,
o Evaluations of the City’s ten (10) lift stations was conducted based on record drawings, maintenance records, prior lift station condition assessment studies, O&M staff field observations, and a previous 2017 lift station condition assessment.
o City staff observations and recommendations for sewer system repairs. o Force Main assessments were conducted based on; record drawing, maintenance records, force main condition assessment studies, and operation staff knowledge.

The most recent force main condition assessment (2015 FMCA) was conducted by Pure Engineering Services Inc. in April 2015, which included documentation of the City’s force main inventory, engineering analysis, condition assessment, and 189
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rehabilitation recommendations. The 2015 FMCA was made based on findings from various field investigation techniques including leak and gas pocket detection survey, hydrogen sulfide monitoring, pressure transient monitoring, hydraulic evaluation, pipe wall assessment for selected mains, soil corrosion, and fatigue analysis.
o The condition assessment includes CCTV data for approximately 98% of the City sewer system. Pipelines were ranked with a condition score of 1-5, with a ranking of 5 being most severe. Other criteria were also used to rank pipeline status as part of a Risk Analysis that considered; structural rating, inspection condition, service rating, pipe age, pipe material, and sewer spill history. Pipelines were also scored based on five criteria:
▪ Size
▪ 2043 Peak Wet Weather Flow Projections
▪ Proximity to Critical Facilities
▪ Proximity to Water Bodies
▪ Nearest Street Type
A final gravity main rehabilitation plan was developed considering the condition assessment and risk assessment results which resulted in the development of a decision tree for final recommendations on pipeline rehabilitation and/or replacement:

Figure 8-1 Pipeline Rehabilitation/Replacement Decision Tree 190
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Manhole inspections were not conducted as part of this condition assessment; however a 30% replacement rate was assumed as part of the final CIP list. Capital improvement projects were identified as part of the condition assessment. These projects are identified in Section 8.5 of this Element.

8.3 Capacity Evaluation & Design Criteria
The main trunk sewer system was analyzed using the Innovyze InfoSWMM hydraulic modeling program to evaluate performance of the wastewater collection system under both existing and future flow conditions.

Design criteria, as shown in Table 8-1 below, were applied in the analysis of the trunk sewer collection model. Gravity pipe performance was analyzed based on maximum percent full depth over diameter (d/D) ratio, defines as the depth of flow in a pipe divided by the diameter of the pipe.

Table 8-1: Hydraulic Criteria for Existing Systems
Standard Criteria
Velocity
Minimum: 2.0 ft/s when flowing half full
Maximum: 10 fps
Friction
Factor
Manning’s n (gravity)=0.013
Minimum
Pipe Size 8-inch
Maximum
Allowable
Flow Depth
Existing gravity mains 12-inch or less: d/D=0.70
Existing gravity mains 12-inch to 24-inch: d/D=0.85
New gravity mains 12-inces or less d/D=0.50
New gravity mains 12-inch or greater: d/D=0.75
All criteria above represent PWWF flow conditions
Surcharging Allowed as long as the Hydraulic Grade Line (HGL) remains at least 5-Feet Below the rim elevation
Forcemain
Hydraulics
Hazen-William’s “C” factor of 130 is used for the
hydraulic analysis of the force mains. Force mains
are recommended to be sized to provide minimum
velocity of at least 3 fps at Peak Dry Weather Flow
(PDWF) condition and maximum velocities not
exceeding 8 fps under PWWF condition
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Where improvements were recommended to the collection system, worst case d/D values were provided for reference. These d/D values represent a snapshot of the system under either;
o existing conditions, or
o proposed conditions with all improvements in place.

Through the digital sewer model, maximum d/D was analyzed for the system as a whole, ensuring that recommended updates did not trigger additional downstream or upstream improvements.

Inline flow monitoring was completed to capture dry and wet weather hydraulic conditions and evaluate hydraulic conditions through year 2043.

Capital improvement projects were identified as part of this hydraulic evaluation for existing and future conditions. Projects are included in Section 8.5 of this Element.

8.4 Prioritization of Corrective Actions
The SSMPU identified capital improvement projects which included staff O&M based projects, hydraulic deficient projects, lift station improvement projects and CCTV data.

The City prioritized these projects based on the following criteria:
o Size,
o 2043 Peak Wet Weather Flow Projections,
o Proximity to Critical Facilities,
o Proximity to Water Bodies,
o Nearest Street Type.

Each of these categories was provided a weighted importance factor and each project received an overall ranking score as generated by Information Asset Planner software.

The City reviews these projects to assess if rankings require adjustment regularly.

Lift Station CIP Ranking
Lift Station CIPs were ranked based on the following:
o Critical improvements on lift stations that were the most problematic and have immediate issues,
o Recommended for completion to mitigate risk and/or replace aging facilities, o Low priority improvements that can be addressed in the long- term future phase.

8.5 Capital Improvement Plan
The City developed a ranked Capital Improvement List which is included in Appendix 8A.

This CIP includes the following types of projects for gravity mains, force mains, lift stations, and manholes:
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o Facilities that are Capacity Deficient (current or future), o Facilities that require upgrade due to poor condition, o Facilities that require additional assessments.

Funding for Projects
The City utilizes a combination of sewer user fees, sewer connection fees, sewer bonds, and developer contributions to fund sewer capital projects.

The status of these projects is shown in Appendix 8A with current and anticipated sources of funding. Full project descriptions are provided in the 2024 SSMPU.

The City continues to evaluate additional sources of funding for Capital Projects and will amend project information pertaining to schedules and sources of funding included in Appendix 8A.

8.6 Additional WDR Requirements
The City plans to conduct a Vulnerability Assessment to address the following WDR requirements as applicable:
o Prioritize the condition assessment of system areas that:
▪ Hold a high level of environmental consequences if vulnerable to collapse, failure, blockage, capacity issues, or other system deficiencies; ▪ Are located in or within the vicinity of surface waters, steep terrain, high groundwater elevations, and environmentally sensitive areas; o Are within the vicinity of a receiving water with a bacterial-related impairment on the most current Clean Water Act section 303(d) List;
o Assess the system conditions using visual observations, video surveillance and/or other comparable system inspection methods;
o Utilize observations/evidence of system conditions that may contribute to exiting of sewage from the system which can reasonably be expected to discharge into a water of the State;
o Identify system assets vulnerable to direct and indirect impacts of climate change, including but not limited to: sea level rise; flooding and/or erosion due to increased storm volumes, frequency, and/or intensity; wildfires; and increased power disruptions. o Outline how capacity assessment considers:
▪ Data from existing system condition assessments, system inspections, system audits, spill history, and other available information; ▪ Capacity of flood-prone systems subject to increased infiltration and inflow, under normal local and regional storm conditions;
▪ Capacity of systems subject to increased infiltration and inflow due to larger and/or higher-intensity storm events as a result of climate change; ▪ Increases of erosive forces in canyons and streams near underground and above- ground system components due to larger and/or higher-intensity storm events;
o Capital Improvement Plan that includes:
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▪ Project schedules including completion dates for all portions of the capital improvement program;
▪ Internal and external project funding sources for each project; and ▪ Joint coordination between operation and maintenance staff, and engineering staff/consultants during planning, design, and construction of capital improvement projects; and Interagency coordination with other impacted utility agencies.

The Vulnerability Assessment is planned for completion by 2029. Capital Projects associated with this Vulnerability Assessment will be incorporated into the Capital Projects list included in Appendix 8A.
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ELEMENT 9 - MONITORING, MEASUREMENT & PROGRAM MODIFICATIONS The City monitors the implementation of the SSMP elements in order to measure the effectiveness of the City’s SSMP program in reducing sewer spills. The manner in which each SSMP element is monitored and evaluated and the schedule with which the City completes this monitoring and evaluation is described in this SSMP Element.

9.1 Regulatory Requirements
WDR Order No. 2022-0103-DWQ Section D 9 states:

The Plan must include an Adaptive Management section that addresses Planimplementation effectiveness and the steps for necessary Plan improvement, including:
(a).Maintaining relevant information, including audit findings, to establish and prioritize appropriate Plan activities;
(b).Monitoring the implementation and measuring the effectiveness of each Plan Element;
(c). Assess the success of the preventative maintenance activities; (d).Updating Plan procedures and activities, as appropriate, based on results of monitoring and performance evaluations; and
(e).Identifying and illustrating spill trends, including spill frequency, locations and estimated volumes.

9.2 Data Management
The City manages, schedules, and tracks preventative maintenance activities in their Outlook based Maintenance and Management System. The system covers the following:
o Sewer Line Cleaning
o High Priority Area Cleaning and Inspections
o Manhole Inspections and Maintenance
o Lift Station Inspection and Maintenance
o Customer Complaints
o Work Orders
o CCTV Inspections
o FOG Program Inspections
Triennial SSMP Audit Reports are maintained at the City’s Public Works office. Corrective actions from Audit Reports are generally addressed in updates of the City’s SSMP or more immediate actions are completed per the recommended corrective action schedule in each triennial audit.

9.3 Establishing and Prioritizing SSMP Activities
Table 9-1 outlines the relevant information maintained by the City to establish and prioritize appropriate sewer collection system activities and the title of staff in the City who are responsible for monitoring implementation and measuring the effectiveness of each element when appropriate.
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Table 9-1: SSMP Implementation Management
SSMP Element SSMP Relevant Information Responsible Party

1. Goal This SSMP Element contains the City’s goals for the operation, maintenance, and management of
the sanitary sewer collection system, which
provide focus to reduce Spills and mitigate Sewer
Spills that do occur.

Senior Civil Engineer

2. Organization A table containing names, job titles, roles, responsibilities, and contact information is
contained in this SSMP Element, which identifies
the person most knowledgeable for each aspect
of the SSMP Program. An organization chart
shows lines of authority.

Senior Civil Engineer

3. Legal Authority Web Links in this SSMP Element contain the sections of City Policies & Ordinances governing
the sewer collection and conveyance system.

Senior Civil Engineer and
City Legal Counsel

4. Operation and
Maintenance
Program
Information in the SSMP Element document the
sanitary sewer system operation and maintenance
activities.

Senior Civil Engineer &
Public Works Services
Manager

5. Design and
Performance
Provisions
City Website links in this SSMP Element include
City Design Standards/Specifications and Testing
requirements.

Senior Civil Engineer

6. Spill Emergency
Response Plan
The City updated a Spill Emergency Response
Plan in 2023 which include staff contact
information, mandatory Spill reporting information,
and response and mitigation programs.

Senior Civil Engineer &
Public Works Services
Manager

7. Pipe Blockage
Control Program
Monitor any changes in system that may require
modification to the City’s program.

Senior Civil Engineer &
Public Works Services
Manager

8. System Evaluation,
Capacity
Assurance, and
Capital
Improvements
The City will review and update this element as
applicable to update project schedules, status of
projects and sources of funding for associated
projects.

Senior Civil Engineer

9. Monitoring,
Measurement, and
Program
Modifications
This SSMP Element will be updated annually with
the data in Tables 9-2 and 9-3 in a calendar year.

Senior Civil Engineer

10. SSMP Program
Audits
SSMP Audit Reports are required triennially.

Corrective actions should be implemented and
tracked.

Senior Civil Engineer

11. Communication
Program
Examples of public outreach materials and
pertinent City website addresses, as well as
meeting agendas, pertinent Council reports and
minutes are found on the City Website and City
office.

Senior Civil Engineer
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9.3 Preventative Maintenance Program Assessment
The City’s Preventative Maintenance Program includes CCTV inspection, line cleaning, visual manhole inspection, Lift Station maintenance, and High Priority Area identification and maintenance. The City will review these operation and maintenance practices annually and compare them with annual Spill records. A summary of performance metrics of monitoring and measurement to inform corrective actions for operations and maintenance will be developed annually using Table 9-2 below.

Table 9-2: Sanitary System Performance Metrics for Monitoring and Measurement Performance Measure Source
System Statistics Total Miles of Gravity Sewer Atlas Maps/Master Plan Total Miles of Pressure Sewer Atlas Maps/Master Plan
Total Number of Manholes Atlas Maps/Master Plan
Total Number of Sewer Lift Stations Atlas Maps/Master Plan Operations and
Maintenance
Linear Feet of Sewer Line Cleaned Work Order Requests
and Staff Field Notes
Linear Feet of High Priority Lines Cleaned Work Order Requests and Staff Field
Notes/Inspection Forms
Number of Blockages/Backups not
resulting in sewer spill
Work Order Requests
and Staff Field
Notes/Inspection Forms
Linear Feet of CCTV Work Order Requests,
Staff Field Notes, CCTV
Reports
Number of Manholes Inspected Work Order Requests
and Staff Field
Notes/Inspection Forms
Lift Station Inspections Field Notes/Inspection
Forms
FOG Inspections # of Inspections and
Reinspection’s
Inspection Forms &
FOG Database
Root Control Linear Feet Root Control Invoices
and Reports
Measures Based on
Sewer Spill Numbers
Number and Percentage of dry weather
vs. wet weather Spills
CIWQS
Number of Spills by cause (Operational, CIWQS
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Performance Measure Source
Capacity, System, Other)
Number of Spills per 100 miles per Year CIWQS
Total Volume of Spills CIWQS
Average Spill Volume CIWQS
Total volume recovered and percentage of
overall total Spill Volume
CIWQS
Net volume of Spills (total minus
recovered) and percentage of overall total
Spill volume
CIWQS
Total volume reaching storm drainage
channel that is not recovered or reaching
surface waters and percentage of overall
total Spill volume.

CIWQS
Spill Response Time Average response time during business hours
CIWQS
Average response time outside of
business hours.

CIWQS
Condition
Assessment,
Rehabilitation, and I/I
Control
Amount of CCTV inspection performed
(Linear Feet)
CCTV Reports
Number of manholes inspected Field Notes/Inspection
Forms
Number of inflow sources detected and
corrected.

Field Notes/Inspection
Forms & Studies
Capital Projects Summary of short- and long-term projects, sources of funding and status of each
project.

Capital Projects
Schedule
Outreach Pipe Blockage Control Program summary
of outreach efforts.

City Outreach Materials
and distributions
Goals Summary of how Goals are being met and
areas of improvement where Goals have
not been achieved.

Element 1 Goals and
Supporting data to
demonstrate
performance.

Training Summary of Training to meet Element 4
training requirements and other City
training programs.

Training Records
199
Sewer System Management Plan – Revision 02
Element 9 – Monitoring, Measurement, and Program Modifications City of Belmont
August 2025

9.4 SSMP Updates
The City will use the SSMP for management, training, planning and regular maintenance of the collection system. As the document is utilized, any deficiencies or discrepancies will be corrected. Program elements will be updated based on performance evaluations, organizational, operational, and maintenance changes, new regulatory requirements, repairs, replacements, and upgrades made to the collection system.

At a minimum, the City will review and revise the SSMP annually as warranted. The Public Works Director is responsible for revising and maintaining the SSMP.

A revision record will be maintained to track changes.

9.5 Spill Trends
The trends in the City Sewer Spills for a three-year period utilizing the criteria in Table 9-3. The cause categories identified in Table 9-3 are the causes available for use in the Sewer Spill Report provided in California Integrated Water Quality System (CIWQS). City Staff are responsible for determining which cause category is appropriate for each Spill when the Spill is reported in CIWQS.

Table 9-3 City of Belmont per Indicator per Year
Criteria Indicator
Spills No. of Spills
Multiple Spills at Same
Location # of Locations with Multiple Spills
Spill Volume (gal)
Volume
Volume Recovered
Volume Reached Surface Water
Spill Causes
Debris - Construction
Debris – General
Debris – Rags
Flow Exceeded Capacity
FOG
Operator Error
Other
200
Sewer System Management Plan – Revision 02
Element 9 – Monitoring, Measurement, and Program Modifications City of Belmont
August 2025

Criteria Indicator
Pipe Structural Problem/Failure
Pump Station Failure
Rainfall Exceeded Design
Root Intrusion
Vandalism
Comparison with
Regional and State
Averages
Average Spill Volume
Average # of Spills
The City will continue to plan and adjust operation and maintenance practices so that the number of Spills experienced on an annual basis remains low. 201
Sewer System Management Plan – Revision 02
Element 10 – Sewer System Management Plan Program Audits City of Belmont
August 2025

ELEMENT 10 - SEWER SYSTEM MANAGEMENT PLAN PROGRAM AUDITS SSMP audits are required to identify and correct deficiencies in the most current revision of the City’s SSMP and provide a schedule to correct identified deficiencies. This SSMP Element outlines the audit process and identifies staff responsible for conducting or participating in SSMP audits and generating the required SSMP Audit Report.

10.1 Regulatory Requirements
WDR Order No. 2022-0103-DWQ Section D 10 requires:

The Plan shall include internal audit procedures, appropriate to the size and performance of the system. Additionally, the General Order requires;
The internal audit shall be appropriately scaled to the size of the system(s) and the number of spills. The Enrollee’s sewer system operators must be involved in completing the audit. At minimum, the audit must:
o Evaluate the implementation and effectiveness of the Enrollee’s Sewer System Management Plan in preventing spills;
o Evaluate the Enrollee’s compliance with this General Order; o Identify Sewer System Management Plan deficiencies in addressing ongoing spills and discharges to waters of the State; and
o Identify necessary modifications to the Sewer System Management Plan to correct deficiencies.

The Enrollee shall submit a complete audit report that includes:
o Audit findings and recommended corrective actions;
o A statement that sewer system operators’ input on the audit findings has been considered; and
o A proposed schedule for the Enrollee to address the identified deficiencies.

10.2 SSMP Program Audits
The Senior Civil Engineer or their designee is responsible for assuring the SSMP audit is conducted and complete based on the schedule outlined on the SWRCB lookup website which requires audits to be conducted at a three-year interval from the prior audit. Audits should be conducted with the cooperation of the City staff responsible for sewer system operations and maintenance, administrative staff, and engineering staff. When conducting the SSMP audit, City staff must evaluate the effectiveness of each SSMP Element. A comprehensive, effective review of the City’s SSMP must be documented in a SSMP Audit Report.

10.2.1 Summary of Procedure:

1. Gather appropriate documents using the SSMP Audit Data & Records Request, which is provided in Appendix 10A.

2. Interview City staff responsible for the administration, operations, maintenance and engineering associated with system performance information. 202
Sewer System Management Plan – Revision 02
Element 10 – Sewer System Management Plan Program Audits City of Belmont
August 2025

3. Develop Audit Report and reference all documents reviewed and used as evidence of compliance with the WDR. Create a plan and schedule for updates to the SSMP based on changes in operational strategies or deficiencies found in the SSMP.

4. Evaluate the effectiveness of the City’s SSMP and compliance with each WDR requirement using the ranking methodology outlined in Table 10-1.

Table 10-1: SSMP Audit Ranking Criteria
Ranking Ranking Basis
In Compliance All requirements specified in the element are met.

Substantial Compliance The majority of requirements in the element are met.

Partial Compliance Half of the requirements in the element are met.

Marginal Compliance Less than half of the requirements in the element are met.

Out of Compliance None of the requirements in the element are met.

The SSMP Audit Report must be signed and certified by the Legally Responsible Official (LRO).

The SSMP Audit Report must be certified using the language provided below:
“I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.”
Subsequent SSMP audits must be conducted continuously on a three-year interval following the schedule outlined below which is based on the dates required by the 2022 WDR:
• SSMP Audit Period: August 2, 2024 - August 2, 2027 (Audit report due 2/2/27) • SSMP Update: Update due 8/2/31.

Additional SSMP Audit and SSMP Update regulatory schedules required after the dates shown above should be identified in the following link:
https://www.waterboards.ca.gov/water_issues/programs/sso/lookup/ To assist in the audit process, the City should consider quarterly or semiannual reviews and revisions to specific SSMP Elements and associated supporting documents. These reviews and revisions will help ensure current operational practices and procedures are reflected in the 203
Sewer System Management Plan – Revision 02
Element 10 – Sewer System Management Plan Program Audits City of Belmont
August 2025

SSMP and documentation on these activities is readily available during an audit by the Regional Water Quality Control Board, and/or State Water Resources Control Board.

SSMP Audit Reports must be kept on file and submitted to the online CIWQS Sanitary Sewer Database within six (6) months after the end of the 3-year audit period. 204
Sewer System Management Plan – Revision 2
Element 11 – Communication Program
City of Belmont
August 2025

ELEMENT 11 - COMMUNICATION PROGRAM
Communicating the objectives of the SSMP and the importance of sanitary sewer system management practices to the public is essential. An informed public can assist and support the City by reducing customer caused blockages, which will potentially decrease sewer spills.

11.1 Regulatory Requirements
WDR Order No. 2022-0103-DWQ Section D 11 states:

The Plan must include procedures for the Enrollee to communicate with:
o The public for:
▪ Spills and discharges resulting in closures of public areas, or that enter a source of drinking water, and
▪ The development, implementation, and update of its Plan, including opportunities for public input to Plan implementation and updates.
o Owners/operators of systems that connect into the Enrollee’s system, including satellite systems, for:
▪ System operation, maintenance, and capital improvement-related activities.

11.2 Communication Program
The purpose of the City sanitary sewer system communication program is to educate stakeholders, which include residential and commercial users of the collection system, about the SSMP. Public awareness of different components of the SSMP is accomplished through different mediums and may reach different audiences. The following are activities that the City practices to increase awareness and education about the importance of having a properly constructed, maintained, and operated sewer collection system.

Table 11-1: City Communication Program Overview
Activity Frequency Stakeholders
City Website:
https://www.belmont.gov/ Year-round All
City Council Meetings Tuesdays @ 6:00 pm All
Social Media – Facebook,
Instagram Year-round All
City Office Year-round All

11.2.1 City Website
Information is posted on the City website, https://www.belmont.gov/ and includes reports, documents, maps, links, City meeting minutes, and agendas, educational material, and public service announcements. The City SSMP can be found on the City website. Sewer spill emergency contact information is also provided on the City website. 205
Sewer System Management Plan – Revision 2
Element 11 – Communication Program
City of Belmont
August 2025

Updates and revisions to the SSMP will be posted and maintained on the City website when completed.

11.2.2 City Council Meetings
City Council Meetings are generally held on second and fourth Tuesdays of each month at the City Hall. Sewer capital improvement projects, sewer studies, SSMP updates, significant revisions, audits and SSMP status reports are presented at the Council meetings to receive input.

11.2.3 Social Media
The City uses social media (Facebook, Nextdoor, X, LinkedIn, Youtube, and Instagram) to post information about utility projects, public education and outreach, and highlight items on the Council agenda.

11.2.4 City Public Works Office
The City Office located at 1 Twin Pines Lane, has copies of educational material, public service announcements, and staff that provide assistance and education to the public. Office hours are Monday- Friday from 8:00am to 5:00pm.

11.2.5 Public Notices for Spills – Public Areas
The public is notified of spills and discharges that result in closures of public areas (including streets and surface waters) by erecting cones and barricades, and by posting warning signs in accordance with the Spill Emergency Response Plan. The necessary equipment and signage are kept in the City’s emergency response vehicles.

11.2.6 Public Notices for Spills – Public Areas
The City has identified one water purveyor who would be notified in the event of a sewer spill in the vicinity of a source of drinking water. This purveyor is listed below:
o Mid-Peninsula Water District
3 Dairy Lane, Belmont CA 94002
(650) 591-8941
Superintendent: Michael Anderson [email protected]

11.3 Satellite and Tributary Systems
The City of San Carlos is tributary to the Belmont sanitary sewer system, and the City of Belmont is tributary to the City of San Carlos and the City of San Mateo. Communication with the San Mateo and San Carlos is conducted on an as needed basis when conditions are warranted. Typical scenarios that require communication are:
o FOG Control Programs
o Capital Improvement Projects
o Sewer Spills
o Required Sewer System Maintenance and/or Capital Projects 206
Sewer System Management Plan – Revision 02
Element 2 – Organization
City of Belmont
August 2025

APPENDIX 2
2A City Sewer Organization Chart
207
Assistant PW Director/
City Engineer
Public Works Director
Administration
Management Analyst
Admin. Assistant
Admin. Assistant
Public Works
Services Manager
Environmental
Field Supervisor

C I T Y O F B E L M O N T

D E P A R T M E N T O F P U B L I C W O R K S
Engineering
Assistant Civil Engineer
Senior Civil Engineer
Senior Civil Engineer
Senior Civil Engineer
Assistant Civil Engineer
Assistant Civil Engineer
Engineering Tech
Construction Inspector
Construction Inspector
Streets & Traffic
Field Supervisor
Fleet Maintenance
Senior Mechanic
Mechanic
Lead
Maintenance
Worker
Drainage and Water
Pollution Control
Equipment
Operator
Street Sweeper
Operator
Lead
Maintenance
Worker
Sewer
Maintenance
Worker
Maintenance
Worker
Maintenance
Worker
Lead
Maintenance
Worker
Streets
Equipment
Operator
Maintenance
Worker
Electrician /Lead
Maintenance
Worker
Maintenance
Worker
Maintenance
Worker
Maintenance
Worker
208
Sewer System Management Plan – Revision 04
Element 2 – Operations and Maintenance
City of Belmont
August 2025

APPENDIX 4
4A City Emergency Contact Information and Vendors
209
City of Belmont Sewer System Emergency Staff Contact Information and Vendors City of Belmont Public Works
City of Belmont Corporate Yard
110 Sem Lane, Belmont, CA 94002
(650) 595-7425 Monday – Friday 8am – 5pm
(650) 595-7400 After Hours
Emergency Call Out List Contact
Tim Murray (Field Supervisor) (650) 759-0422 / (650) 222-6460 (Cell) Ryan Moran (Field Supervisor) (650) 787-1418 / (650) 222-6405 (Cell) Marcus Escobedo (City Electrician) (510) 648-4655 / (650) 222-6459 (Cell) Brandon Tyler ( Public Works Manager) (650) 504-7494 / (650) 222-5240 (Cell) Kuuipo Unga ( Lead Worker) (650) 464-5288 (Cell)
Ryan Talavera (Lead Worker) (650) 533-2761 / (650) 830-1562 (Cell) Vendor Contact
Telstar (Electrical Repairs) (501) 693-8043
All Industrial Electrical Supplies (650) 777-0060
DW/Hertz (Bypass Pumping) (510) 566-8542
Koffler Electrical/Mechanical Repairs (510) 567-0630
Shape Inc. (Flygt Pumps) (209) 234-5909
Pump Repair Service (415) 467-2150
Flo-Line Technology (ABS/Sulzer Pumps) (530) 887-2240
Electro-Motion (Emergency Generator Rentals) (650) 321-5227 A-1 Tank Service (510) 714-8110
Hertz Equipment Rentals (408) 451-9320
Royal Wholesale Electric (650) 591-5571
Consolidated Electrical Distribution (650) 369-2954
Casey Construction (Emergency Repairs) (650) 222-4455
Underground Republic (Pipe & Couplings) (650) 455-7473
210
Sewer System Management Plan – Revision 02
Element 8 – System Evaluation, Capacity Assurance, and Capital Improvement Projects City of Belmont
August 2025

APPENDIX 8
8A City CIP Living Project Schedule
211
City of Belmont Sewer System CIP (See SSMPU Table 9-7 for project details) Updated 5/28/25 Project Name CIP Type Facility Type Project Status Source of Funding CIP 1 Capacity Gravity Main and Manhole Completed Developers contributions and sewer bonds.

CIP 2 Capacity Gravity Main and Manhole Completed Developers contributions and sewer bonds.

CIP 3 Capacity Gravity Main and Manhole Design and construction 2025/2026
Developers contributions
and sewer bonds.

CIP 4 Capacity Gravity Main and Manhole Design and construction 2030/2031
Developers contributions
and sewer bonds.

CIP 5 Capacity Gravity Main and Manhole Design and construction 2030/2031
Developers contributions
and sewer bonds.

CIP 6 Capacity Gravity Main and Manhole Design and construction 2026/2027
Developers contributions
and sewer bonds.

CIP 7 Capacity Gravity Main and Manhole Design and construction 2027/2028
Developers contributions
and sewer bonds.

CIP 8 Capacity Gravity Main and Manhole Design and construction 2028-2030
Developers contributions
and sewer bonds.

CIP 9 Capacity Gravity Main and Manhole Design and construction 2032/2033
Developers contributions
and sewer bonds.

CIP 10 Capacity Gravity Main and Manhole Design and construction 2034/2035
Developers contributions
and sewer bonds.

CIP 11 Capacity Gravity Main and Manhole Design and construction 2034/2035
Developers contributions
and sewer bonds.

CIP 12 Capacity Gravity Main and Manhole Design and construction 2033/2034
Developers contributions
and sewer bonds.

CIP 13 Capacity Gravity Main and Manhole Design and construction 2035/2036
Developers contributions
and sewer bonds.

CIP 14 Capacity Gravity Main and Manhole Design and construction 2036/2037
Developers contributions
and sewer bonds.

CIP 15 Capacity Gravity Main and Manhole Design and construction 2037/2038
Developers contributions
and sewer bonds.

CIP 16 Capacity Gravity Main and Manhole Design and construction 2038/2039
Developers contributions
and sewer bonds.

San Juan Lift Station Capacity
Lift Station Design started 2024,
Construction to happen in
2026/27
Developers contributions
and sewer bonds.

Rehabilitation Batch 1 Condition Gravity Main and Manhole Construction in 2025 Sewer rates and bonds Rehabilitation Batch 2 Condition Gravity Main and Manhole Design and Construction 2025-2026
Sewer rates and bonds
Rehabilitation Batch 3 Condition Gravity Main and Manhole Design and Construction 2026-2027
Sewer rates and bonds
212
Rehabilitation Batch 4 Condition Gravity Main and Manhole Design and Construction 2027-2028
Sewer rates and bonds
Rehabilitation Batch 5 Condition Gravity Main and Manhole Design and Construction 2028-2029
Sewer rates and bonds
Rehabilitation Batch 6 Condition Gravity Main and Manhole Design and Construction 2029-2030
Sewer rates and bonds
Rehabilitation Batch 7 Condition Gravity Main and Manhole Design and Construction 2030-2031
Sewer rates and bonds
Hiller Lift Station Condition Lift Station Construction 2024/2025 Developers contributions and sewer bonds.

Island Park Lift Station Condition Lift Station Design 2026, Construction 2028
Developers contributions
and sewer bonds.

Ralston Lift Station Condition Lift Station Design 2029, Construction 2030 Sewer rates and bonds
Sports Complex Force
Main Condition Force Main Design 2026, Construction
2028 Sewer rates and bonds
Island Park Force Main Condition Force Main Design 2026, Construction 2028
Developers contributions
and sewer bonds.

San Juan Force Main Condition
Force Main Design started 2024,
Construction to happen in
2026/27
Developers contributions
and sewer bonds.

Hiller Force Main Condition
Assessment Condition Others Design in 2028 Sewer rates and bonds 213
Sewer System Management Plan – Revision 02
Element 10 – SSMP Audits
City of Belmont
August 2025

APPENDIX 10
10A Audit Data and Records Request
214

SSMP AUDIT DATA & RECORDS REQUEST
A. SSMP ADMINISTRATIVE YES LOCATED
WHERE? NO N/A COMMENTS
A1 a.

Has your agency enrolled in the State-wide GWDR and designated the responsible or authorized representative (LRO)?
b. Provide a copy of the SSMP Certification in CIWQS.
c.

Provide a copy of the CIWQS print-out for all LROs and Data Submitters.
d. Provide a copy of your Operational Report(s) from CIWQS. e.

Does the SSMP include a narrative that discusses; summary of plan and associated schedules, sewer system asset overview, updated maps?
A2 a. Has your agency adopted a SSMP?
b. Provide a copy of the SSMP.
c.

Provide a copy of the Meeting Minutes for the agency
governing body's meeting during which the SSMP was
adopted.

A3 a.

Does your agency have a copy of the GWDRs available to agency staff? Where is it kept?
A4 a.

How does agency ensure revenues and expenditures related to sanitary sewer system are available to; comply with General Order, fully implement the SSMP, conduct O&M and necessary repairs, ensure proper spill response?
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B. GOALS YES LOCATED
WHERE? NO N/A COMMENTS
B1 a. Has your agency developed SSMP and Spill reduction goals? b.

Provide documentation that your agency has made progress toward meeting these goals.

C. ORGANIZATION YES LOCATED
WHERE? NO N/A COMMENTS
C1 a.

Does your SSMP clearly identify the names and job titles the LROs?
C2 a.

Does your SSMP have an organizational chart or table showing individual roles and responsibilities for implementation of the SSMP?
b. Are names, titles, and telephone numbers provided in this chart or table?
C3 a.

Is the chain of communication for reporting Spills included in the SSMP?
b. Are names, titles, and telephone numbers provided in this chain of communication?
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SSMP AUDIT DATA & RECORDS REQUEST
D. LEGAL AUTHORITY YES LOCATED
WHERE? NO N/A COMMENTS
D1 a.

Provide the sanitary sewer system use ordinances, service agreements, or other legally binding procedures or documents, which demonstrates the agency's legal authority:
b. Prohibit illicit discharges
c.

Collaborate w/ Stormwater Agencies for sewer spill response and prevent cross connections of sanitary sewer and storm sewer infrastructure.
c.

Require that sewers and connections be properly designed and constructed
d.

Ensure access for maintenance, inspection, or repairs for portions of the lateral owned or maintained by the Public Agency
e. Enforce any violation of its sewer ordinances
f.

Obtain easement accessibility agreements for locations
requiring sewer system operations and maintenance, as
applicable.

E. OPERATIONS AND MAINTENANCE (O&M) YES LOCATED
WHERE? NO N/A COMMENTS
E1 a. Provide the following documents:
b. An updated map of the agency's sanitary sewer system and storm drain system.
c.

A schedule for maintenance and cleaning of the sanitary sewer system.

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SSMP AUDIT DATA & RECORDS REQUEST
d. How do O&M and R&R schedules enhance System Resilience? e.

Documentation for maintenance and cleaning of the sanitary sewer system.
f. Documentation for scheduled and conducted activities, such as work orders and/or reports and invoices from contractors. g.

The O&M contract if the agency's collection system is operated and maintained by a contract operations firm.
h. The agency's Rehabilitation and Replacement Plan
i. » Summary of the agency's CCTV program and schedule.

Include samples of inspections and summary of findings. j. » List of current and planned projects
k. » Time schedule for planned projects
l. » Schedule for developing the funds needed for
rehabilitation and replacement projects
m.

Standard Operating Procedures for Sewer System Operations and Maintenance activities.
n.

Training records for staff operations and maintenance
activities and contractor operations and maintenance
activities. Training records for CIWQS reporting, Spill volume estimation, Spill response training.

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SSMP AUDIT DATA & RECORDS REQUEST
o.
» All applicable licenses and certifications required for agency or contract staff. Provide documents stating this requirement.
p.

Assessment of O&M Staff "Core Competencies" (Skills,
Knowledge and Abilities)
q.

Equipment and replacement part inventories, including
identification of critical replacement parts.
r.
» If critical replacement parts are not kept in stock,
identify and provide method in which these parts are
acquired when needed (List of emergency contractors
and/or suppliers).
s.
» If critical replacement parts are not kept in stock,
provide applicable mutual aid agreements.
q.

Equipment and replacement part inventories, including
identification of critical replacement parts.
r.
» If critical replacement parts are not kept in stock,
identify and provide method in which these parts are
acquired when needed (List of emergency contractors
and/or suppliers).
s.
» If critical replacement parts are not kept in stock,
provide applicable mutual aid agreements.

F. DESIGN & PERFORMANCE PROVISIONS YES LOCATED
WHERE? NO N/A COMMENTS
F1 a. Provide the following documents:
b. Design and construction standards and specifications for:
c. » the installation of new sanitary sewer systems
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d. » pump stations and other appurtenances specific to the agency's collection and conveyance system
e.
» the rehabilitation and repair of existing sanitary sewer systems
f.

Procedures and standards for inspecting and testing the installation of new sewers, pumps, and other appurtenances specific to the agency's collection and conveyance system and for rehabilitation and repair projects.

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SSMP AUDIT DATA & RECORDS REQUEST
G. SPILL EMERGENCY RESPONSE PLAN YES LOCATED
WHERE? NO N/A COMMENTS
G1 a. Provide the agency's Spill Emergency Response Plan b.

Notification procedures ensuring that the primary responders, regulatory agencies, and potentially affected entities are informed of all Spills in accordance with the Monitoring and Reporting Program, Order No. 2022-0103.
c. A program to ensure an appropriate response to all spills. d.

Procedures to ensure that appropriate staff and contractor personnel are aware of and follow the Spill Emergency
Response Plan and are appropriately trained.
e.

Procedures to address emergency operations, such as traffic and crowd control and other necessary response activities. f. Procedures to address spill volume estimation.
g.

A program to ensure that all reasonable steps are taken to contain and prevent the discharge of untreated and partially treated wastewater to waters of the United States.
h.

A program to ensure that all reasonable steps are taken to minimize or correct any adverse impact on the environment resulting from the Spills, including such accelerated or additional monitoring as may be necessary to determine the nature and impact of the discharge.
i.

Plan to coordinate with storm drain agencies and other
impacted utilities in the event of a Spill. Plan to conduct Post Spill Assessments.

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SSMP AUDIT DATA & RECORDS REQUEST
H. SEWER PIPE BLOCKAGE CONTROL PROGRAM YES LOCATED
WHERE? NO N/A COMMENTS
H1 a.

Public Education and Outreach Program for pipe blocking substances.
b. Disposal facilities for pipe blocking substances.
c.

Ordinance demonstrating the agency's legal authority to prohibit discharges to the sewer system and prevent spills and blockages.
d.

Requirements to install grease removal devices, design
standards for these devices, maintenance requirements, BMPs, recordkeeping and reporting requirements.
e.

Ordinance demonstrating the agency's legal authority to prohibit FOG discharges to the system and inspect FOG
producing facilities.
f. Evidence of FOG Control Program inspection and enforcement activities.
g.

Documentation of hot spots in the collection system, which are caused by FOG.

I. SYSTEM EVALUATION, CAPACITY ASSURANCE, AND CIP YES LOCATED WHERE? NO N/A COMMENTS
I1 a. Provide procedures to evaluate the sanitary sewer system assets. b. Percentage of system assessed annually and rationale for this frequency.

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c.

Provide information that demonstrates condition assessment prioritizes areas that: 1) Have high level of environmental consequences if vulnerable to failure or are deficient for any reason; 2) Are located in or within the vicinity of surface waters, steep terrain, high groundwater elevations, and environmentally sensitive areas; 3) Are within the vicinity of a receiving water with a bacterial-related impairment on the most current Clean Water Act section 303(d) List
d.

Provide information demonstrating system is assessed using visual observations, video surveillance and/or other
comparable system inspection methods.
e.

Provide information demonstrating corrective actions for areas that may contribute to exiting of sewage from the system which can reasonably be expected to discharge into a water of the State.
f.

Provide information that demonstrates you have identified system assets vulnerable to direct and indirect impacts of climate change, including but not limited to: sea level rise; flooding and/or erosion due to increased storm volumes, frequency, and/or intensity; wildfires; and increased power disruptions
g.

Provide analysis and procedures to identify system
components that are experiencing or contributing to spills caused by hydraulic deficiency and/or limited capacity, including procedures to identify the appropriate hydraulic capacity of key system elements for:
• Dry-weather peak flow conditions that cause or contributes to spill events;
• The appropriate design storm(s) or wet weather events that causes or contributes to spill events;
• The capacity of key system components; and
• Identify the major sources that contribute to the peak flows associated with sewer spills.

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SSMP AUDIT DATA & RECORDS REQUEST
h.

Information that demonstrates the capacity assessment
considers: •
Data from existing system condition assessments, system inspections, system audits, spill history, and other available information; · Capacity
of flood-prone systems subject to increased infiltration and inflow, under normal local and regional storm conditions; · Capacity of systems subject to increased infiltration and inflow due to larger and/or higher-intensity storm events as a result of climate change;
· Increases of erosive forces in canyons and streams near underground and above- ground system components due to
larger and/or higher-intensity storm events;
· Capacity of major system elements to accommodate dry
weather peak flow conditions, and updated design storm and wet weather events; and
· Necessary redundancy in pumping and storage capacities. i.

Demonstrate how corrective actions are prioritized based on these condition assessments based on the severity of the consequences of potential spills.
j.

Capital Improvement Plans: based on the results of these condition assessments provide the following:
1) project schedules, including completion dates for all rehabilitation and replacement projects or CIP;
2) Internal and External project funding sources for each project; 3) Information demonstrating coordination between operations and maintenance staff, engineering staff, and consultants during the planning, design and construction of CIP. If other utility agencies are impacted,
document coordination efforts.

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SSMP AUDIT DATA & RECORDS REQUEST
J. MONITORING, MEASUREMENT & PROGRAM MODIFICATIONS YES LOCATED WHERE? NO N/A COMMENTS
J1 a. Adaptive Management strategies
b. · Provide relevant information, including audit findings, to establish and prioritize appropriate Plan activities;
c.
· Provide relevant information demonstrating the
implementation and measuring the effectiveness of each Plan Element;
d. · Provide relevant information demonstrating the success of the preventive operation and maintenance activities;
e.
· Provide relevant information demonstrating update of plan procedures and activities, as appropriate, based on results of monitoring and performance evaluations;
f. Identification of SSO trends.

K. SSMP PROGRAM AUDITS YES LOCATED
WHERE? NO N/A COMMENTS
K1 a. Provide historical SSMP Program Audit Reports.

L. COMMUNICATION PROGRAM YES LOCATED
WHERE? NO N/A COMMENTS
L1 a.

Provide the agency's Communication Program and evidence of its implementation.

WG SSMP Audit Data Records Request
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Sanitary Sewer Master Plan Update
Executive Summary Page 1
2024 Sanitary Sewer Master Plan Executive Summary
This Sanitary Sewer Master Plan Update (Master Plan) presents an evaluation of the City of Belmont (City)’s wastewater collection system under existing and future conditions, and recommendations for a 16-year Capital Improvement Program (CIP) based on findings from capacity evaluation and condition assessment studies. This Master Plan is a tool to help the City proactively make decisions on implementing and budgeting for CIP projects to provide reliable and resilient sewer services to its existing and future customers. This Master Plan has a 20-year planning horizon till year 2043.

Existing Wastewater Collection System
The City’s sewer service area encompasses approximately 4.6 square miles (sq. mi.) serving a population of approximately 28,335.1
The City’s wastewater collection system is divided into 15 sewer basins with approximately 80 miles of gravity mains, 10 lift stations, and approximately 3.4 miles of force mains. Under current condition, the majority of the City’s wastewater flows are carried by two parallel trunk sewer lines along Ralston Ave, herein referred to as “Ralston Trunk Lines”, and discharged into the Belmont Pump Station (BPS) that is owned and operated by Silicon Valley Clean Water (SVCW), and subsequently treated at the SVCW Wastewater Treatment Plant (WWTP). A small portion of wastewater flows are discharged into the wastewater collection systems of the City of San Mateo (San Mateo) and a small portion of wastewater flows are flowing from and to the City of San Carlos (San Carlos). SVCW recently completed the construction of Belmont Gravity Pipeline (BGP) project and is planning to demolish the BPS. The City’s wastewater will be discharged into BGP and carried to the San Carlos Pump Station by gravity once BGP is in service.

The City has also planned to annex a small collection system south of the City limit called the Harbor Industrial Sewer Maintenance District (HISMD) that is in the unincorporated part of San Mateo County, and is currently owned and operated by the County.

Wastewater Flows
Based on the historical BPS influent data, water consumption data, and temporary flow monitoring data, the City’s existing average dry weather flow (ADWF) is estimated to be 1.44 million gallons per day (mgd) with 1.38 mgd discharged into the BPS, 0.017 mgd discharged into San Mateo’s wastewater collection system, and 0.036 mgd discharged into San Carlos’s wastewater collection system. The City’s maximum dry day flow (MDDF) between 2016 and 2021 was 1.91 mgd, approximately 1.38 times the ADWF. With anticipated future developments and population growth, the City’s ADWF is projected to increase to 2.65 mgd by 2043.

The City is subject to high rainfall dependent infiltration and inflow (RDII) during storm events. A temporary flow monitoring study was performed between November 2021 and April 2022 as part of the Master Plan. During the rain event that occurred between December 12, 2021 and December 17, 2021, 1 Source: U.S. Census Bureau, 2020 Census of Population and Housing (https://www.census.gov/quickfacts/fact/table/belmontcitycalifornia/POP010220) 226
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Executive Summary Page 2
observed peak flow at BPS influent was 10.92 mgd which occured on December 13, 2021, and was approximately 7.9 times the existing ADWF. Details on the City’s wastewater flow characteristics are provided in Section 5.

Capacity Evaluation
The City’s wastewater collection Geographic Information System (GIS) database has been updated as part of the Master Plan project. In addition, a field survey of approximately 200 manholes was performed as part of the Master Plan. Based on the updated GIS database, survey data, flow monitoring data, and other supporting information, the City’s hydraulic model was updated and recalibrated to reflect current flow characteristics observed in the system. System RDII responses to storm events were analyzed by sewer basin using the RTK method described in Section 6. Based on the calibrated results, Sewer Basins 8,12, and 14 have the highest RDII responses and Sewer Basin 9 has the lowest RDII responses. These RDII responses may change with the City’s on-going rehabilitation and maintenance program as rehabilitating and replacing aged and defective pipes and manholes can reduce RDII into the collection system. Therefore, a temporary flow monitoring study is recommended to be performed every three to five years as part of future model updates.

Capacity evaluation was performed using the calibrated model under existing (2023), near-term future (2028), and long-term future (2043) Peak Wet Weather Flow (PWWF) conditions. The PWWF scenarios account for a 10-year recurrence frequency, 24-hour duration storm event with a total precipitation of 3.64 inches based on the National Oceanic and Atmospheric Administration (NOAA) Atlas 14 Volume 6 Version 2 Point Precipitation Frequency Estimates at the San Mateo Station with Site ID 04-7864. Temporal distribution of the 10-year 24-hour design storm was derived based on the storm event that occurred on March 5, 2016. The design storm has a peak intensity of 0.97 inches per hour. The existing PWWF was estimated to be approximately 11.3 mgd at BPS inlet, the 2028 PWWF was estimated to be approximately 13.2 mgd discharging into BGP, and the 2043 PWWF was estimated to be approximately 16.3 mgd discharging into BGP. System capacity evaluation details are provided in Section 7.

Model results were checked against the established planning criteria. Most of the deficient pipelines identified under the 2043 PWWF condition are deficient under 2023 PWWF condition. There are 16 capacity-related gravity main improvement projects identified based on the capacity evaluation results.

Capacity-related Improvement CCIP_8 is considered a vital improvement for the City as it is an improvement proposed at the most downstream segments of the trunk lines that collect almost the entire system’s wastewater flows. CCIP_8 proposed upsizing of existing 21-inch line in Karen Rd to 27- inch, upsizing the downstream 27-inch line in Harbor Blvd to 30-inch, adding a new 27-inch parallel line crossing Hwy 101 connecting to the existing 18-inch line in Shoreway, and upsizing the 18-inch line in Shoreway bewteen the new 27-inch parallel line and the exisitng 27-inch line.

This proposed improvement will eliminate capacity deificiencies of the existing trunk lines and will accommodate wastewater flows from HISMD, so it is recommended be completed before the annexation of the HISMD wastewater collection system and is phased in the near-term (2024-2029) CIP.

San Juan Lift Station is also identified to be upsized to meet the recommended lift station capacity criteria. Proposed capacity-related projects have been prioritized into three phases: near-term (2024- 2029), intermediate-term (2029-2033), and long-term (2034-2038). 227
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Condition Assessments
A desktop gravity main condition assessment was performed with the closed-circuit television (CCTV) inspection data provided by the City using InfoAsset Planner (by Autodesk). According to the inspection data, vitrified clay pipes (VCP) and lined VCP were observed to have higher structural defect scores and rating indexes than polyvinyl chloride (PVC) pipes and high-density polyethylene (HDPE) pipes.

Structural defect scores and rating indexes generally increase as pipes age. Rehabilitation actions were assigned to observed defects based on the type of defects.

In addition to evaluating the physical conditions of the pipes, a risk analysis was performed on the gravity mains based on Likelihood of Failure (LOF) criteria such as pipe structural condition, pipe age, pipe material, etc., and Consequence of Failure (COF) criteria such as pipe sizes, carried PWWF, proximity to water bodies, etc. A risk score was assigned to each pipe segment on a scale of 1 to 5.

The final rehabilitation method of a gravity main segment was determined based on a customized decision tree with additional considerations. For example, 6-inch pipelines are not good candidates for lining as it will reduce the inner diameter of the pipes and can lead to future maintenance issues. Thus, 6-inch pipelines which were determined to be fully lined based on defects were recommended to be replaced instead. Proposed rehabilitation methods for the gravity mains include CCTV inspection, cleaning/heavy cleaning/root removal, point repair, partial lining, point repair plus partial lining, investigation, and replacement. The City can perform CCTV inspection, cleaning, and heavy cleaning in-house. The City has also contracted out root removal service to some local vendors. Thus, pipelines proposed with these rehabilitation methods are not included in the CIP cost estimations. Conditionrelated improvement projects are grouped by rehabilitation methods. Pipelines with risk scores of 3 and above are included in the 16-year CIP. The City concurrently developed a pavement plan for street improvements throughout 2029 (2024-2029 Pavement Plan). This Master Plan proposed gravity main rehabilitation to align with the proposed pavement plan. Rehabilitation of pipelines in the streets proposed in the pavement plan between 2025 and 2029 are phased as near-term CIP and the remaining ones are phased as intermediate-term CIP and long-term CIP based on risk scores and locations.

Manhole assessments were not performed as part of this project scope. For CIP budgeting purposes, 30% of the manholes connected to the pipelines which are proposed to be repaired or replaced are assumed to be rehabilitated as well. Lift station (LS) and force main (FM) rehabilitation projects were identified based on previous condition assessment studies as well as interviews with City staff. Hiller LS, San Juan FM, Island Park LS and its force main, as well as the Sports Complex FM are proposed to be rehabilitated in 2024-2028, and Ralston Ranch LS is proposed to be rehabilitated in 2030-2034.

Condition assessment results are discussed in Section 8.

Capital Improvement Program (CIP)
Based on the findings from capacity evaluation and condition assessment and discussions with City staff, a recommended CIP was developed for a 16-year planning horizon that is phased in near-term CIP(2024 – 2029), intermediate-term CIP (2030-2034), and long-term CIP (2035-2039), as presented in Table ES-1. Costs estimations presented in Tables ES-1 were estimated based on unit costs developed from recent local bid results between 2018 and 2023 and the City’s adopted budget plans for 2020 to 2022 and are presented in the 2023 U.S. Dollars. Total CIP costs for near-term CIP, 228
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Executive Summary Page 4
intermediate-term CIP, and long-term CIP are $35.9 Million Dollars, $21.5 Million Dollars, and $11.4 Million Dollars, respectively. CIP cost and phasing details are provided in Section 9. 229
Sanitary Sewer Master Plan Update

Table ES-1. Capital Improvement Cost Estimates Summary
Phase Improvement
Type Facility Type Capital Cost ($)
Total Baseline
Capital Costs ($)
2024-2029 Capacity-Related Gravity Main & Manhole 6,803,460 35,948,000 Lift Station 5,000,000
Condition-Related Gravity Main & Manhole 14,574,504
Lift Station 4,590,000
Force Main 4,779,980
Others 200,000
2030-2034 Capacity-Related Gravity Main & Manhole 5,448,771 21,526,000 Condition-Related Gravity Main & Manhole 14,757,457
Lift Station 1,320,000
2035-2039 Capacity-Related Gravity Main & Manhole 2,247,400 11,381,000 Condition-Related Gravity Main & Manhole 9,133,505
Total ($) 68,855,000
Notes:

1. Costs are rounded to the nearest thousands.
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