cc/bsd 2025 AR 04/22 sewer system management plan certification

ACTION:

____________________________
Clerk/Secretary

Department: Engineering Item No: C8
Prepared by:

Ken Knatz, Sewer Engineering Manager
Erin Adams, Admin Programs Manager Meeting Date: April 22,2025 Approved by:

Greg Mayer, Engineering Director
John Conley, City Manager Agenda Location: Consent Calendar

SUBJECT: SEWER SYSTEM MANAGEMENT PLAN CERTIFICATION

RECOMMENDATION: Receive and file a combined City of Vista and Buena Sanitation District Sewer System Management Plan.

CORRELATION TO CITY COUNCIL GOALS: Routine operational item not corresponding to a specific City Council goal.

PRIOR ACTION: On May 28, 2019, received a combined City of Vista and Buena Sanitation District Sewer System Management Plan and directed staff to file the report (Vote: 5-0).

On May 13, 2014, received a combined City of Vista and Buena Sanitation District Sewer System Management Plan and directed staff to file the report (Vote: 5-0).

On June 23, 2009, received a combined City of Vista and Buena Sanitation District Sewer System Management Plan and directed staff to file the report (Vote: 5-0).

On October 30, 2007, adopted City Council Resolution No. 2007-183, and Buena Sanitation District Resolution No. 2007-13, approving the Development Plan for the Sanitary Sewer Manager Plan (Vote: 4-0, Campbell absent).

STATEMENT ON THE SUBJECT: On December 6, 2022, the State Water Resources Control Board (SWRCB) adopted Order Number 2022-0103-DWQ (Order). The new Order requires updates to Waste Discharge Requirements (WDR) for all publicly owned and operated sanitary sewer collection systems. City of Vista and Buena Sanitation District’s sewer collection systems were previously regulated under SWRCB Order Number 2006-0003-DWQ. The new Order includes changes to the WDR that require updates to our combined agencies’ Sewer System Management Plan (SSMP) to establish proper funding, management, operation, maintenance, and spill response procedures. Implementation of the SSMP ensures effective sewer collection system operation while minimizing risk to public and environmental health.

The SSMP is required to be received by the governing body and certified by a Legally Responsible Official whenever significant updates are made or at least every six years. To comply with the immediate requirements of the new Order that became effective 180 days from SWRCB adoption / June 5, 2023, a combined City of Vista and Buena Sanitation District Spill Emergency Response Plan was included as part of currently approved SSMP (certified May 2019) prior to the June 2023 deadline. Additional updates to

AGENDA
REPORT

CITY COUNCIL

COMMUNITY DEVELOPMENT COMMISSION

SUCCESSOR AGENCY

BUENA SANITATION DISTRICT

JOINT POWERS FINANCING AUTHORITY
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SUBJECT: SEWER SYSTEM MANAGEMENT PLAN CERTIFICATION
that incorporate WDR of the new Order have since been made and are due for certification to the SWRCB in May 2025. Program audits are designated every three years with changes required to be documented continuously.

The 20
25 SSMP (Exhibit 1) was prepared to meet the WDR compliance requirements and has been updated to reflect current plans and industry practices including the following:
• R
eview of the document by staff in Public Works and Engineering. • Update of key agency stakeholder contact directory.
• Inclusion of a Sewer Emergency Response Plan (SERP) and quick reference flow charts for incident management and notifications.
• Update of organizational structure of the City/District organization. • Updates to GIS system mapping procedures.
• Updates reflecting in-house and external training for staff covering Order requirements. • Updates reflecting Cityworks Re-implementation workflow changes to CCTV, Manhole Inspection and other efficiency improvements to preventive maintenance cyclical work. • Update of software systems used to manage collection system. • Update reflecting system evaluation, capacity assurance, and capital improvements through completion of recent projects and incorporation of information from the draft 2025 Sewer Master Plan.
• Update reflecting pump station maintenance and redundancy information. • Updates to reflect legal authority to ensure access to storm sewer systems during spills.

S
taff recommends the City Council receive, file, and direct staff to certify the City of Vista and Buena Sanitation District Sewer System Management Plan with the SWRCB to remain in compliance with State permit requirements.

F
ISCAL IMPACT: There is no fiscal impact associated with the staff recommendation.

E
XHIBITS:

1. 2025 City of Vista and Buena Sanitation District Sewer System Management Plan 04/22/2025
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City of Vista – WDID 9SSO10660
Buena Sanitation District – WDID 9SSO10700
Vista, CA
April 22, 2025
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EXHIBIT 1
Sewer System Management Plan
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Table of Contents
1 Goal and Introduction .......................................................................................................................... 1

1.1 Regulatory Context .................................................................................................................... 1

1.1.1 Prohibitions ................................................................................................................... 2

1.1.2 State Regulations ......................................................................................................... 2

1.1.3 Specifications ............................................................................................................... 3

1.2 SSMP Goal and System Management Objectives ................................................................... 4

1.2.1 Goals – City of Vista ..................................................................................................... 4

1.2.2 Goals – Buena Sanitation District ................................................................................ 4

1.3 SSMP Update Schedule............................................................................................................ 5

1.4 Sewer System Asset Overview ................................................................................................. 6

1.4.1 Access to Up-to-Date Mapping .................................................................................. 11

1.5 SSMP Overview ...................................................................................................................... 11 2 Organization ...................................................................................................................................... 13

2.1 Overview.................................................................................................................................. 13

2.2 Authorized Representatives .................................................................................................... 13

2.3 Positions Responsible for Implementing Specific SSMP Elements ........................................ 14

2.3.1 Positions Responsible ................................................................................................ 14

2.3.2 Lines of Authority ........................................................................................................ 14

2.3.3 Roles and Responsibilities ......................................................................................... 17

2.4 Spill Reporting Chain of Communication ................................................................................ 19

2.4.2 Spill Notification and Reporting Guidelines ................................................................ 20 3 Legal Authority .................................................................................................................................. 25

3.1 Overview.................................................................................................................................. 25

3.2 Authority to Prevent Illicit Discharge and Infiltration/Inflow ..................................................... 27

3.3 Authority to Collaborate with Storm Sewer Agencies ............................................................. 28

3.4 Authority to Require Proper Design and Construction of Sewers ........................................... 28

3.5 Authority to Ensure Access to Publicly Owned Portion of Lateral .......................................... 29

3.6 Authority to Limit the Discharge of FOG and other Debris ...................................................... 30

3.7 Authority to Enforce Violations of Sewer Ordinances ............................................................. 31

3.8 Authority to Obtain Easement Accessibility Agreements When Applicable ............................ 31 4 Operation and Maintenance Program ............................................................................................... 33

4.1 Up-to-Date Map of the Collection System ............................................................................... 33

4.1.1 Access to Up-to-Date Mapping .................................................................................. 33

4.2 Operation and Maintenance Program Activities ...................................................................... 33

4.3 Training.................................................................................................................................... 35

4.4 Equipment Inventory ............................................................................................................... 36

4.4.1 Gravity Pipelines ........................................................................................................ 37

4.4.2 Pump Station Equipment and Replacement Part Inventory....................................... 37 5 Design and Performance Provisions ................................................................................................. 39

5.1 Design and Performance Summary ........................................................................................ 39

5.2 Procedures and Standards for Inspecting and Testing System Improvements ...................... 39 04/22/2025
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6 Spill Emergency Response Plan ....................................................................................................... 41

6.2 Annual Review and Update ..................................................................................................... 42 7 Sewer Pipe Blockage Control Program ............................................................................................. 43

7.1 Program Overview ................................................................................................................... 43

7.2 Implementation Plan and Schedule for Public Outreach ........................................................ 45

7.3 Plan and Schedule for FOG Disposal within the Service Area ............................................... 47

7.4 Authority to Prohibit FOG Discharges and Identify Measures to Prevent FOG Spills and Blockages ......................................................................................................................... 47

7.5 FOG Program Requirements and Design Standards ............................................................. 48

7.5.1 Requirements to Install Grease Removal Devices .................................................... 48

7.5.2 Design Standards for Grease Removal Devices ....................................................... 48

7.5.3 Best Management Practices Requirements ............................................................... 49

7.5.4 Maintenance Requirements ....................................................................................... 49

7.5.5 Record Keeping and Reporting Requirements .......................................................... 50

7.6 Inspection and Enforcement Program ..................................................................................... 50

7.7 Maintenance Program to Address FOG Issues ...................................................................... 51

7.8 Implementation of Source Control Measures to Address FOG Issues ................................... 52 8 System Evaluation, Capacity Assurance, and Capital Improvements .............................................. 55

8.1 System Evaluation and Condition Assessment ...................................................................... 55

8.1.1 Best Practices and New Technology ......................................................................... 55

8.1.2 Evaluation of Sanitary Sewer System Assets ............................................................ 55

8.1.3 Condition Assessment Strategy ................................................................................. 56

8.1.4 Inspection and Condition Assessment Methods ........................................................ 57

8.1.5 Inspection and Assessment Recordkeeping .............................................................. 57

8.1.6 Assessing Assets Vulnerable to Climate Change ...................................................... 57

8.2 Capacity Assessment and Design Criteria .............................................................................. 58

8.2.1 Procedures for Identifying and Addressing Hydraulic Deficiencies and Capacity Limits ........................................................................................................... 58

8.2.2 Capacity Assessment Considerations ........................................................................ 59

8.3 Prioritization of Corrective Actions .......................................................................................... 60

8.3.1 Sewer Condition Remediation Prioritization ............................................................... 60

8.4 Capital Improvement Plan ....................................................................................................... 60

8.4.1 Funding ...................................................................................................................... 61 9 Monitoring, Measurement, and Program Modifications .................................................................... 63

9.1 Maintenance Information to Prioritize SSMP Activities ........................................................... 63

9.2 Monitoring Implementation and Effectiveness of the SSMP ................................................... 63

9.2.1 Performance Monitoring and Program Changes ....................................................... 63

9.3 Assessment of Preventive Maintenance Program .................................................................. 64

9.4 Identification and Illustration of Spill Trends............................................................................ 64

9.5 Approach to Program Modifications and Plan Updates .......................................................... 65 10 SSMP Program Audits ...................................................................................................................... 67

10.1 Schedule of Program Audits and Updates .............................................................................. 67

10.2 SSMP Audit Process ............................................................................................................... 67

10.3 SSMP Audit Report ................................................................................................................. 68

10.4 Audit Implementation and Tracking of Results........................................................................ 68 04/22/2025
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11 Communication Program ................................................................................................................... 69

11.1 Procedures to Communicate with Public for Spills and Discharges ....................................... 69

11.2 Procedures to Provide Opportunities for Public Input on SSMP Development, Implementation, and Update ................................................................................................... 69

11.3 Procedures to Communicate with Collection Systems Connecting to City System ................ 70

Tables
Table 1-1. Summary of General Order Requirements .................................................................................. 1 Table 1-2. SSMP Audit and Update Schedule .............................................................................................. 5 Table 1-3. Planned SSMP Implementation Milestones Addressing Prevention of Sewer Spills .................. 6 Table 1-4. Summary of Collection System Assets ........................................................................................ 6 Table 2-1. Authorized Representative ........................................................................................................ 14 Table 2-2. Positions Responsible for Specific SSMP Elements ................................................................. 15 Table 2-3. Notification and Reporting Guidelines ....................................................................................... 21 Table 2-4. Contact Information for Notification and Reporting .................................................................... 23 Table 3-1. Summary of City Legal Authorities ............................................................................................ 26 Table 4-1. Summary of Operation and Maintenance Activities ................................................................... 34 Table 4-2. Summary of Collection System Program Training Activities ..................................................... 36 Table 9-1. Monitoring Summary Table ........................................................................................................ 64 Table 10-1. SSMP Audit and Update Schedule .......................................................................................... 67

Figures
Figure 1-1. City of Vista Service Boundaries ................................................................................................ 9 Figure 1-2. Buena Sanitation District Service Boundaries .......................................................................... 10 Figure 2-1. Organization Chart Identifying Positions and Staff Responsible for Implementing Specific Elements of the SSMP Program ...................................................................................... 16 Figure 2-2. Spill Chain of Communication .................................................................................................. 20 Figure 7-1. FOG Program Development Overview ..................................................................................... 44 Figure 7-2. Education and Outreach Schedule ........................................................................................... 46

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Attachments
Attachment A1. Actions Certifying SSMP ................................................................................................... 71 Attachment A2. State Water Resources Control Board General Order for Sanitary Sewer Systems ........ 73 Attachment B. Organization Names and Contact Information .................................................................... 75 Attachment F1. Spill Emergency Response Plan ........................................................................................ 77 Attachment F2. Spill Response Quick Reference Guide .......................................................................... 115 Attachment F3. Sample Templates for Spill Volume Estimation .............................................................. 120 Attachment F4. Encina Wastewater Authority Environmental Laboratory Accreditation Program Certification ..................................................................................................................................... 129 Attachment J. SSMP Change Log ............................................................................................................ 132

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Acronyms
Acronym Definition
AMP Asset Management Plan
BMP Best Management Practice
BSD or District Buena Sanitation District
Cal-OES California Office of Emergency Services
CAP Climate Action Plan
CCTV Closed-Circuit Television
CIP Capital Improvement Program
CIPP Cured-In-Place Pipe
City City of Vista
CIWQS California Integrated Water Quality System
CMMS Computerized Maintenance Management System
CMOM Capacity Management, Operations, and Maintenance
CPC California Plumbing Code
EMA Enhanced Maintenance Area
EWA Encina Wastewater Authority
EWPCF Encina Water Pollution Control Facility
FOG Fats, Oils, and Grease
FSE Food Service Establishment
General Order Statewide Sanitary Sewer Systems General Order 2022-0103-DWQ GHG Greenhouse Gas
GIS Geographic Information System
H₂S Hydrogen Sulfide
I&I Inflow and Infiltration
IAPMO International Association of Plumbing and Mechanical Officers KPI Key Performance Indicator
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Acronym Definition
LRO Legally Responsible Official
MOU Memorandum of Understandings
NASSCO National Association of Sewer Service Companies
NIMS National Incident Management System
NPDES National Pollution Elimination Discharge System
O&M Operations and Maintenance
PACP Pipeline Assessment Certification Program
POTW Publicly Owned Treatment Works
ROW Right-of-Way
SEMS Standardized Emergency Management System
SERP Spill Emergency Response Plan
SSMP Sewer System Management Plan
SWRCB State Water Resources Control Board
VC Vista-Carlsbad Interceptor
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1 Goal and Introduction

1.1 Regulatory Context
The City of Vista (City) operates and maintains its own sanitary collection system as well as that of the Buena Sanitation District (BSD or District). As the administering agency for the District, the City has prepared this updated Sewer System Management Plan (SSMP) pursuant to the State Water Resources Control Board’s (SWRCB’s) December 6, 2022, Statewide Sanitary Sewer Systems General Order 2022-0103-DWQ (General Order). This SSMP serves as a comprehensive management plan for both the City’s and the District’s collection systems.

Table 1-1 summarizes the General Order requirements addressed by this SSMP. These requirements are defined by General Order specifications and associated General Order attachments. All agencies that own and operate collection systems greater than 1 mile in length must comply with these requirements.

Table 1-1. Summary of General Order Requirements
Specification Description Linkage to SSMP

5.2 SSMP Development and
Implementation
Requires development and
implementation of a SSMP
Entire SSMP

5.3 Certification of SSMP and Plan
Updates
Requires the City to certify and
upload the SSMP to CIWQS
Entire SSMP

5.5 Six-Year SSMP Update Requires update of the SSMP every 6 years, at a minimum. Requires
governing board approval of SSMP.

Requires City to certify and upload
SSMP to CIWQS.

Entire SSMP

5.6 System Resilience Requires City to include and
implement system-specific
procedures to proactively prioritize
operations and maintenance,
condition assessments and repair
and rehabilitation to address
system resilience
D.4 Operations and Maintenance
D.8 System Evaluation, Capacity
Assurance and Capital Planning

5.10 System Capacity Requires City to maintain system
capacity to convey dry weather and
forecasted wet weather flows
D.8 System Evaluation, Capacity
Assurance and Capital Planning

5.19 Operation and Maintenance Requires City to maintain in good working order and operate as
design any facilities, treatment or
control systems design to contain
and convey sewer.

D.4 Operations and Maintenance
D.8 System Evaluation, Capacity
Assurance and Capital Planning

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This document serves as the City and District’s 2025 update to the SSMP approved by the City Council and Buena Sanitation District Board of Directors at a public meeting on April 22, 2025. Attachment A1 includes the Agenda Report Summary and Consolidated Actions from the meeting. Attachment A2 includes the General Order.

A PDF copy of this SSMP is available on the internet at:
https://www.vista.gov/home/showpublisheddocument/24059/637563288510470000.

1.1.1 Prohibitions
To meet the provisions contained in Division 7 of the California Water Code and regulations adopted thereunder, the discharger is required to comply with the following prohibitions:
• Any Spill that results in a discharge of untreated or partially treated wastewater to waters of the United States is prohibited.
• Any Spill that results in a discharge of untreated or partially treated wastewater that creates a nuisance is defined in California Water Code Section 13050(m) is prohibited.

1.1.2 State Regulations
On December 6, 2022, the SWRCB adopted the General Order, which became effective on June 5, 2023. This General Order supersedes the previous SWRCB Order 2006- 0003-DWQ and amendments thereafter. The intent of the General Order is to regulate all collection systems in the State with the goal of reducing or eliminating the number of sewer spills which, by their nature, pollute the environment. The General Order is applicable for all publicly owned sewage collection systems with more than 1 mile of sewer pipe. Both the City and the District are approved for regulatory coverage under the General Order as Enrollees.

The General Order requires public agencies that own or operate sanitary sewer systems to develop and implement SSMPs and report all sewer spills to the SWRCB’s online sewer spill database. The General Order requires each local or regional sewer agency to appoint a legally responsible official (LRO) and establish a monitoring and reporting organization to monitor and report all sewer spills in accordance with the requirements of the Order and to have the LRO certify the sewer spill report using the California Integrated Water Quality System (CIWQS) website in the timeframe required by the Order. If no sewer spills occur during the course of any given month, the LRO is required to fill out, certify, and send via the CIWQS website a “No Spill Certification” documenting that there were no sewer spills for the month reported.

Order No. R9-2007-0005, adopted by the San Diego Regional Water Quality Control Board on February 14, 2007, requires additional Waste Discharge Requirements (WDR) for sanitary sewer systems within their respective jurisdiction. Because Private Lateral Sewage Discharges are numerous and are a potential threat to public health and the environment, there is a need to have a reliable reporting system for Private Lateral Sewage Discharges for similar reasons as the public spills. Although sewage collection agencies are not responsible for the cause, cleanup, or repair of Private Lateral Sewage Discharges, sewage collection agencies are typically notified and/or are the first 04/22/2025
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responders to Private Lateral Sewage Discharges. Consequently, requiring the sewage collection agencies to report all known Private Lateral Sewage Discharges is reasonable and a first step toward development of a regulatory approach for reducing Private Lateral Sewage Discharges in the San Diego Region.

The City performs the management, operation, and maintenance for both collection systems as one system. This SSMP reflects the ongoing day-to-day activities of the City for the management, operation, maintenance, and funding of the City’s sanitary collection system and the sanitary collection system of the Buena Sanitation District. As such, this SSMP becomes a living document subject to review and revision as conditions and needs of the collection systems change. This SSMP relies on numerous supporting documents, also subject to change, that form the basis for how the City conducts its collection system operation for both the City and District. The most current version (although it may be subject to update at any time) will be found at the City of Vista’s Engineering and Public Works offices.

1.1.3 Specifications
The discharger must comply with the following eighteen specifications of the General Order. These specifications are detailed in Attachment A2:

1. Designation of an LRO

2. Sewer System Management Plan Development and Implementation

3. Certification of Sewer System Management Plan and Plan Updates

4. Sewer System Management Plan Audits

5. Six-Year Sewer System Management Plan Update

6. System Resilience

7. Allocation of Resources

8. Designation of Data Submitters

9. Reporting Certification

10. System Capacity

11. System Performance Analysis

12. Spill Emergency Response Plan and Remedial Actions

13. Notification, Monitoring, Reporting and Recordkeeping Requirements

14. Electronic Sanitary Sewer System Service Area Boundary Map

15. Voluntary Reporting of Spills from Privately-Owned Sewer Laterals and/or Private Sanitary Sewer Systems

16. Voluntary Notification of Spills from Privately-Owned Laterals and/or Systems to the California Office of Emergency Services

17. Unintended Failure to Report

18. Duty to Report to Water Boards
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19. Operation and Maintenance
The mandatory elements of the SSMP are specified below in Section 1.5; however, if the Enrollee believes that any element of this section is not appropriate or applicable to the Enrollee’s sanitary sewer system, the SSMP program does not need to address that element. The Enrollee must justify why that element is not applicable. For purposes of this SSMP, the term “Enrollee” refers to both the City and the District.

1.2 SSMP Goal and System Management Objectives
The goal of the SSMP is to provide a documented plan that describes all collection system activities and programs employed by an Enrollee to ensure proper management of all collection system assets. Implementing an SSMP will ensure proper management, operation, and maintenance of all parts of the sanitary sewer system, ultimately helping reduce and prevent spills, as well as mitigate any spills that do occur, including meeting all applicable regulatory notification and reporting requirements. Commitment to continual improvement will also ensure that the SSMP is both a living and sustainable document that is continually updated, revised, and tailored towards the City’s and District’s needs.

1.2.1 Goals – City of Vista
The SSMP outlines the City’s plan to achieve the goal of properly managing, operating, and maintaining the sanitary sewer system to prevent and reduce spills and mitigate any spills that may occur. More specifically, the goals of the City’s SSMP are to:

1. Properly manage, operate, and maintain all portions of the wastewater collection system

2. Provide adequate capacity to convey the peak wastewater flows

3. Minimize the frequency of spills

4. Mitigate the impacts associated with any spills that might occur

5. Meet all applicable regulatory notification and reporting requirements As required by the General Order, a copy of the SSMP is maintained at the City, is available to the public, State, and RWQCB upon request (in accordance with Section

6.3), and is available to the sanitary collection system operating and maintenance personnel at all times.

The City will also comply with Order No. R9-2007-0005 and 2022-0103-DWQ and all future revisions, included by reference in the General Order.

1.2.2 Goals – Buena Sanitation District
The City and the District’s sanitary collection systems are managed, operated, and maintained as a single sanitary collection system by the City. Unless otherwise specified, the goals of the District are identical to those of the City. The goals of the District are to:

1. Properly manage, operate, and maintain all portions of the wastewater collection system
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2. Provide adequate capacity to convey the peak wastewater flows.

3. Minimize the frequency of spills.

4. Mitigate the impacts associated with any spills that may occur.

5. Meet all applicable regulatory notification and reporting requirements.

As required by the General Order, a copy of the SSMP is maintained at the City, is available to the public, State, and RWQCB upon request (in accordance with Section

6.3), and is available to the sanitary collection system operating and maintenance personnel at all times.

The District will also comply with Order No. R9-2007-005 and 2022-0103-DWQ and all future revisions, include by reference in the General Order.

Compliance with the Spill Monitoring and Reporting Program is conducted by City staff on behalf of the District.

1.3 SSMP Update Schedule
Pursuant to the General Order, the City conducts program monitoring and triennial audits of its SSMP, prepares SSMP updates, and implements planned activities to achieve City collection system program objectives. The City has met all the mandatory elements of the SSMP and completed milestones for the incorporation of activities addressing the prevention of sewer spills. The SSMP must be updated every 6 years and must include any significant program changes. Program changes that are not significant are captured in the change log included in Attachment J.

Re-certification by the Vista City Council is required when significant updates to the SSMP are made. The certification is available in Attachment A1.

The schedule for auditing and updating this SSMP is provided in Table 1-2. Element 10 of the SSMP includes a longer-term schedule for SSMP audits and updates.

Table 1-2. SSMP Audit and Update Schedule
Activity Due Date
2027 SSMP Audit November 2, 2027
2030 SSMP Audit November 2, 2027
2031 SSMP Update May 2, 2031

The City plans to complete implementation of several significant initiatives addressing the prevention of sewer spills. Table 1-3 provides a schedule for incorporation of these activities into the City’s SSMP program implementation. 04/22/2025
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Table 1-3. Planned SSMP Implementation Milestones Addressing Prevention of Sewer Spills
Element Milestone Milestone Due Date Relevance to Spill Prevention
D.4 Operation and
Maintenance
Migrate all closed-circuit
television (CCTV) data to
WinCan’s cloud-based
platform. City plans to
leverage WinCan’s
advanced features such
as heat mapping and
other visualization tools to
guide operation and
maintenance activities.

December 31, 2025 Supports identification of
maintenance and structural
issues.

D.4 Operation and
Maintenance
The City is in the process
of optimizing the use of
CityWorks. This includes
updating work order
management processes,
enhancing data
visualizations and
reporting, and using other
key capabilities from the
software.

December 31, 2026 Improves preventative
maintenance scheduling
and asset condition
monitoring to prioritize
repairs and replacements,
reducing the risk of
potential sewer spills.

D.8 System Evaluation,
Capacity Assurance and
Capital Improvements
Utilize Replacement
funding to address
significant structural
deficiencies.

December 31, 2025 Removes structural
deficiencies causing risk of
potential sewer spill.

1.4 Sewer System Asset Overview
The City owns and operates over 216 miles of sewer collection pipelines and one small capacity pump station, the Raceway Pump Station. The City of Vista and the City of Carlsbad jointly own and operate two additional large capacity pump stations (Agua Hedionda and Buena Vista Pump Stations) and associated pipelines. The District, which is an entity of the City, owns and operates 96 miles of sewer collection pipelines and one large capacity pump station, Buena Creek Pump Station. Both collection systems convey sewage to the Encina Water Pollution Control Facility (EWPCF) in the City of Carlsbad for treatment. Table 1-4 provides a summary of the collection system assets for each collection system. Figure 1-1 shows the geographic service area boundary of the City’s collection system and Figure 1-2 shows the geographic service area boundary of the District’s collection system.

Table 1-4. Summary of Collection System Assets
Collection System Assets City of Vista Buena Sanitation District CIWQS WDID 9SSO10660 9SSO10700
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Collection System Assets City of Vista Buena Sanitation District Population (count) 90,000 41,000
Total Mains (miles) 216 96
Gravity Mains (miles) 213 93
Siphon Locations (Count) 1 0
Force Mains (miles) 3 3
Pump Stations (count) 3 1
Wastewater Conveyed (MGD) 5.3 1.8
Treatment Facility EWPCF EWPCF

Other relevant information regarding the City and District’s collection systems and management program includes:
• Location: City of Vista and Sanitation Buena District • Service Area Boundary: Figure 1-1 and Figure 1-2 show the geographic service area boundary of each collection system.
• Community Served: The City’s sanitary collection system consists of approximately 216 miles of public pipelines, serving approximately 16,700 parcels, and conveys an annual average flow of 5.3 MGDs. The Cities of Vista and Carlsbad share ownership of the outfall interceptor sewer, which routes sewage approximately 7.5 miles through two pump stations and force mains to EWPCF. The District’s sanitary collection system consists of approximately 96 miles of public mains and trunk sewers, serving approximately 6,400 parcels, and conveys an annual average flow of 1.8 MGDs. The Buena Outfall routes sewage approximately 5.5 miles through the Buena Creek Pump Station to EWPCF. • Data Management Systems: The City uses the following data management systems:
o Geographic Information System (GIS): Software used for managing and mapping City geographically referenced data.
o WinCan: Closed-circuit television (CCTV) inspection software. o CityWorks: A computerized maintenance management system (CMMS) used for managing maintenance activities that is GIS-centric. CityWorks stores the history of past maintenance events, including maintenance frequencies and schedules for future maintenance activities. 04/22/2025
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o Aquanuity: Hydraulic modeling software used for planning capacity improvements, system expansions, emergency scenarios, and other hydraulic network elements.
• Lateral Ownership and Operational Responsibilities: The City does not own any portion of the service lateral. The private property owner is responsible for lateral maintenance and repair from the building connection to the wye connection at the sewer mainline.
• Breakdown of Service Connections: The breakdown of the Buena Sanitation service connections is roughly 28 percent residential, 8 percent commercial, and 64 percent industrial. The breakdown of the City of Vista service connections is roughly 72 percent residential, 92 percent commercial, and 36 percent industrial. • Unique Service Boundary Conditions and Challenges: The Cities of Vista and Carlsbad share ownership of the outfall interceptor sewer, which routes sewage approximately 7.5 miles through two pump stations and force mains to EWPCF.
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Figure 1-1. City of Vista Service Boundaries

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Figure 1-2. Buena Sanitation District Service Boundaries 04/22/2025
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1.4.1 Access to Up-to-Date Mapping
SWRCB or Regional Water Board staff can gain access to system mapping by contacting the LRO for the City, using the contact information provided in Table 2-1.

1.5 SSMP Overview
This SSMP complies with the General Order and meets the following General Order objectives:
a. Properly fund, manage, operate, and maintain, with adequately trained staffs and/or contractors possessing adequate knowledge, skills, and abilities as demonstrated through a validated certification program at all times, all parts of the collection system owned and/or operated by the discharger. b. Provide adequate capacity to convey base flows and peak flows, including flows during wet weather events, to the minimum design criteria as defined in the discharger’s System Evaluation and Capacity Assurance Plan (a required component of the SSMP), for all parts of the collection system owned and/or operated by the discharger.
c. Take all feasible steps to stop and mitigate the impact of spills in the collection system owned and/or operated by the discharger.

The City, on behalf of the District, has prepared this SSMP to ensure compliance with the General Order. As the City of Vista and the Buena Sanitation District’s sanitary collection systems are operated as one system by the City of Vista, this SSMP pertains to the management, operation, and maintenance of both collection systems. This was done to facilitate document management and provide a program that is easier to understand for the general public and for City staff.

This SSMP document is divided into chapters with each chapter dedicated to a specific element of the General Order. Within each chapter the City is listed separately from the District, unless noted otherwise. Each chapter contains the plan the City utilizes to comply with that requirement. Any references to documents are included in each chapter, where applicable. The Roles and Responsibilities section (located only in Chapter 2) contains the title and description of duties for the City staff positions responsible for developing and/or implementing the elements of the SSMP. Actual contact information for the listed job titles is located in Attachment B.

The City achieves objectives specified by the General Order by implementing a comprehensive sewer infrastructure asset management program that is documented in the following 11 SSMP elements:

1. Goal and Introduction

2. Organization

3. Legal Authority

4. Operation and Maintenance Program

5. Design and Performance Provisions
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6. Spill Emergency Response Plan

7. Sewer Pipe Blockage Control Program

8. System Evaluation, Capacity Assurance and Capital Improvements

9. Monitoring, Measurement, and Program Modifications

10. SSMP Program Audits

11. Communication Program
When appropriate, the SSMP references other program documentation for greater detail.

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2 Organization

2.1 Overview
The City operates and maintains both its own sanitary collection system and the District’s sanitary collection system. Each sewer collection system is a distinct legal entity and both convey sewage for treatment at the EWPCF, which is operated by Encina Wastewater Authority (EWA). Both are primarily gravity systems, although there are four lift stations between the City and the District. These are:
• Raceway Pump Station, located at 2685 South Melrose Drive • Buena Creek Pump Station, located at 2080 South Melrose Drive • Buena Vista Pump Station, located at Buena Vista Lagoon at 2140 Jefferson Street in Carlsbad
• Agua Hedionda Pump Station, located at Agua Hedionda Lagoon northeast of the NRG power plant at 4698 Carlsbad Boulevard in Carlsbad
All lift stations are operated and maintained by EWA under various Memorandums of Understanding (MOU) and agreements. The Buena Vista and Agua Hedionda Pump Stations are under shared ownership with the City of Vista and the City of Carlsbad.

The City’s organization and chain of communication requires the following:
a. The name of the responsible or authorized representative as described in Specification 5.1, Designation of a Legally Responsible Official, of the General Order.
b. The names and telephone numbers for management, administrative, and maintenance positions responsible for implementing specific measures in the SSMP program. The SSMP must identify lines of authority through an organization chart or similar document with a narrative explanation. c. The chain of communication for reporting spills, from receipt of a complaint or another information, including the person responsible for reporting spills to the State and Regional Water Board and other agencies if applicable (such as County Health Officer, County Environmental Health Agency, Regional Water Board, and/or California Office of Emergency Services (Cal-OES).

2.2 Authorized Representatives
The City has designated an LRO for both the City and District pursuant to General Order Specification 5.1, Designation of a Legally Responsible Official. Contact information for the City’s LRO is provided in Table 2-1 below.
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Table 2-1. Authorized Representative
Contact Information
LRO Kenneth Knatz, Sewer Engineering Manager
200 Civic Center Drive
Vista, CA 92084
(760) 643-5416
[email protected]

2.3 Positions Responsible for Implementing Specific
SSMP Elements

2.3.1 Positions Responsible
The General Order requires the names and telephone numbers for management, administrative, and maintenance positions responsible for implementing specific measures in the SSMP program. Table 2-2 identifies the various positions responsible for the development and implementation of the SSMP for the City and District. Current names and contact information for all positions are located in Attachment B.

All divisions will maintain relevant tracking data as required to assist with the Monitoring, Measurement, and Program Modifications.

2.3.2 Lines of Authority

CITY OF VISTA
Figure 2-1 includes the titles of all responsible officials in hierarchal format. The City’s organization is revised as necessary to meet changing conditions. Organizational charts are periodically modified to reflect changes in the organization with updated organizational charts available at the City. Names and contact information for all City of Vista staff are available at the City. A narrative description of each position’s involvement in the development and implementation of the SSMP is included in the Roles and Responsibilities section of this chapter.

BUENA SANITATION DISTRICT
As the City is responsible for the management, operation, and maintenance of the District’s sanitary collection system, the included organizational chart and the narrative of each position’s responsibility in the development and implementation of the SSMP applies to both the City and the District. Because the City’s organization is revised from time to time, updated organizational charts are maintained at the City of Vista.

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Table 2-2. Positions Responsible for Specific SSMP Elements General Order
Reference SSMP Element/Measure Responsible Positions
D Overall SSMP Development and Implementation Sewer Engineering Manager D.1 SSMP Goal and Introduction Sewer Engineering Manager D.2 Organization Sewer Engineering Manager
D.3 Legal Authority Sewer Engineering Manager
D.4.1 Update Map of Sanitary Sewer System CMMS Specialist D.4.2 Preventative Operation and Maintenance Activities Operations Manager D.4.3 Training Operations Manager
D.4.4 Critical and Replacement Part inventory Operations Manager D.5 Design and Performance Provisions Sewer Engineering Manager D.6 Spill Emergency Response Plan Operations Manager
D.7 Sewer Pipe Blockage Control Program Operations Manager D.8 System Evaluation, Capacity Assurance and Capital
Improvements Sewer Engineering Manager
D.8.1 System Evaluation and Condition Assessment Operations Manager D.8.2 System Evaluation, Capacity Assurance and Capital Improvements Sewer Engineering Manager
D.8.3 System Evaluation and Capacity Assurance Plan –
Prioritization of Correction Action Sewer Engineering Manager D.8.4 System Evaluation and Capacity Assurance Plan –
Capital Improvement Plan Sewer Engineering Manager
D.9 Monitoring, Measurement, and Program Modifications Sewer Engineering Manager D.10 Internal Audits Sewer Engineering Manager
D.11 Communication Program Sewer Engineering Manager
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Figure 2-1. Organization Chart Identifying Positions and Staff Responsible for Implementing Specific Elements of the SSMP Program

Note: BSD BOD is the Buena Sanitation District Board of Directors 04/22/2025
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2.3.3 Roles and Responsibilities
• The U.S. Environmental Protection Agency is authorized under the Clean Water Act to enforce the Capacity Management, Operations, and Maintenance (CMOM) requirements on the states. In response, the SWRCB and R9WRCB have adopted various orders. Relevant to this SSMP Development Plan are the SWRCB Order 2022-0103-DWQ and R9WQCB Order 2007-0005.
• The City Council, which also serves as the Buena Sanitation District Board of Directors, is responsible for adopting each article of compliance with orders issued by the SWRCB and the Region 9 Water Quality Control Board. • The Encina Wastewater Authority (EWA) operates and manages the Publicly Owned Treatment Works (POTW) processing the wastewater for the member agencies, including the City of Vista and the Buena Sanitation District. Certain agreements provide for EWA to manage remote facilities on behalf of its member agencies. Under these agreements EWA staff manages all pump stations. Part of managing these pump stations includes keeping current emergency response plans, maintenance schedules, equipment inventories, and other duties as may be required. These will be incorporated in the relevant sections of the SSMP. • Outside the City jurisdictional area, NON-City Land Development, Engineering, Building, and Planning Departments are responsible for Land Development Engineering, Building, and Planning approvals. These include work over and around the sewer facilities, grease trap, and lateral connection standards that affect the public system. Sewer Engineering Staff handle the day- to-day administration of the relevant agreements. Any changes are submitted for approval by governing bodies. A listing of these agreements is part of the Sewer Master Plan (SMP) Updates.
• The State and Regional Boards are responsible for providing direction, support, and enforcement of their respective orders, which are based on the Clean Water Act, Porter-Cologne Act, and other specific regulations. They work to coordinate orders to eliminate redundancy and enforcement of the orders. • The City Attorney/District Counsel is appointed by the City Council and Board of Directors and is responsible for legal services for the City and District. The City Attorney is assigned to review all orders, regulations, and statues; development of local ordinances for implementation of WDR orders; handling of code compliance cases requiring legal assistance; as well as coordinating with the City Manager and staff to ensure enforcement of all local ordinances to reduce and eliminate spills.
• The City Manager/District General Manager is responsible for interdepartmental authorization and coordination, delegation of responsibility, and general oversight.
• The Code Enforcement Manager has a minor role in supporting the Engineering Code Enforcement Officers with proper training, badging, handling citations and appeals, and other requirements.
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• The Director of Finance is responsible for managing the budgeting and funding processes required to support the WDR program. These include preparation of the Operating Budget, Capital Improvement Program (CIP) Budget, and any adjustments and modifications, as well as managing any bond programs that may be required to fund needed improvements, all in coordination with and supporting the relevant departments. The Sewer Billings are also managed under the direction of this director.
• The Director of Engineering is responsible for providing overall direction, delegating authority, and facilitating coordination between the departmental divisions of Stormwater, Inspection, ROW, and Sewer Engineering, as well as other City departments. They also support lateral coordination between other City Departments and other jurisdictions involved in WDR compliance activities. • The Communications Officer helps with the required outreach and education components, including, but not limited to, publications, press releases, and workshops. Additionally, this person will be in charge of developing the Communication Program to communicate interactively with the service population.
• The Director of Public Works is responsible for providing overall direction, delegating authority, and providing other needed resources to the Wastewater Operations Division. This position also supports lateral coordination between other City Divisions and other jurisdictions involved in WDR compliance activities.

The Public Works Operations Manager is responsible for supporting the overall Public Works operations including those of the wastewater operations division. • The Director of Community Development provides overall direction and interdepartmental and interagency coordination in the setting of project conditions of approval for projects within the City. Additionally, this position oversees building plan review processes.
• The Building Official is responsible for reviewing any building plans for conformance to current building codes. Specifically, this position will be requiring that any grease interceptors, backflow preventers, or other onsite private sewer systems be designed and built according to the currently adopted building department requirements.
• Due to the similarity with the stormwater quality program, the Stormwater Program Manager will be responsible for managing the FOG inspections of the WDR compliance program. Parallel inspections and code compliance activities are anticipated to be pursued in parallel as much as possible to eliminate redundancy and increase efficiency. Several Environmental Specialist positions assist in stormwater and WDR compliance activities and will be authorized to enforce stormwater and WDR codes.
• The Sewer Engineering Manager in the Sewer Engineering division is the LRO, and is responsible for all aspects of sewer engineering, including private development review, standards, planning, designing, and construction engineering for CIP projects, budgeting, interagency coordination, and maintaining flow agreements. This person will periodically collect and analyze all 04/22/2025
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General Order tracking data in preparing tri-annual program audits and 6-year reauthorizations of the SSMP. Additionally, this person is responsible for creation of and maintenance of the sewer and stormwater GISs and for communicating routinely with satellite systems.
• The Wastewater Supervisor is responsible for all aspects of sewer system operations and maintenance, divided into Maintenance, Cleaning, CCTV Pipeline Assessment (Inspection), and Administration. This person is responsible for managing all maintenance and pipeline condition assessment work orders, along with all required monitoring, measurement, and program modifications that may be required to keep the program efficient.
• The Program Assistant is responsible for overseeing the City collection system Asset Management program to include the management of data in the computerized maintenance management system and data management for activities such as Cleaning, CCTV Pipeline Assessment, renewal decisions, repair coordination, spill response, and coordination of GIS updates. The Program Assistant is also responsible for coordinating with various internal and external organizations for other WDR activities such as training, reporting, and equipment inventories.
• The CMMS Specialist coordinates Sewer Engineering by mapping newly constructed or rehabilitated assets, preparing reports, and identifying and implementing continuous improvement processes.
• All divisions will maintain relevant tracking data as required to assist with the Monitoring, Measurement, and Performance Program.

2.4 Spill Reporting Chain of Communication

CITY OF VISTA
The City has procedures that provide for effective notification of each category of sewer spills through a clear, step-by-step method of communication by City staff at different levels of the organization. The policies and procedures for sewer spill reporting are reviewed and updated as needed to ensure that they are in full compliance with all regulatory and legal requirements. Figure 2-2 shows the chain of communication for reporting spills. The detailed procedures utilized by the City for spill reporting is in the City of Vista Spill Emergency Response Plan (SERP) located in Attachment F1.

BUENA SANITATION DISTRICT
All spills that occur within the District are responded to and reported by the City staff.

Figure 2-2 and the City’s SERP are applicable to both the City and the District. 04/22/2025
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Figure 2-2. Spill Chain of Communication

2.4.2 Spill Notification and Reporting Guidelines
The General Order requires notification and reporting of all unauthorized discharges from the City or District’s sanitary sewer collection systems. The City and District shall notify and report in compliance with the General Order. See Attachment F1 for the complete SERP and Spill Category Breakdown.

Table 2-3 summarizes the required reporting and reporting time frames the City utilizes to comply with the General Order. These reporting procedures are detailed in Attachment F1.
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Table 2-3. Notification and Reporting Guidelines
Type of Spill Agency(s) to notify Notification Timeframe Report Timeframe Category 1 – Any volume discharge of sewage resulting from a failure or flow condition in the City or District’s sanitary sewer collection system that results in discharge to:
• A surface water, including a surface water body that
contains no flow or volume of water; or
• A drainage conveyance system that discharges to
surface waters when the sewage is not fully captured
and returned to the sanitary sewer system or disposed
of properly.

Cal-OES
RWQCB
For spills over 50,000
gallons notify
Stormwater Program
Manager during
business hours, after
hours notify San Diego
County DEH.

Within 2 hours of City
staff becoming aware of
any Category 1 Spill,
notify the Cal-OES and
obtain a notification
control number.

Submit draft report on CIWQS within 3
business days of becoming aware of the
spill.

Certify within 15 calendar days of the spill
end date.

Technical Report: Submit within 45
calendar days after the end date of any
Category 1 spill in which 50,000 gallons or
greater is spilled to surface waters.

Submit Amended Spill Report within 90
calendar days after the spill end date.

Annual Report

Category 2 – Discharges of untreated or partially treated wastewater of 1,000 gallons or greater that do not reach surface water.

Cal-OES

Within 2 hours of City
staff becoming aware of
any Category 2 Spill
greater than or equal to
1,000 gallons, notify the
Cal-OES and obtain a
notification control
number.

Submit draft report on CIWQS within 3
business days of becoming aware of the
spill.

Certify within 15 calendar days of the spill
end date.

Submit Amended Spill Report within 90
calendar days after the spill end date.

Annual Report
Category 3 – Discharges equal to or greater than 50 gallons and less than 1,000 gallons, from or caused by a sanitary sewer system that does not discharge to a surface water.

N/A N/A 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.

Annual Report
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Type of Spill Agency(s) to notify Notification Timeframe Report Timeframe Category 4 – Discharges less than 50 gallons, from or caused by a sanitary sewer system that does not discharge to a surface water.

N/A N/A 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.

There are additional Annual Reporting
Requirements for Category 4.

Private lateral sewage discharges that are caused by
blockages or other problems within a privately owned lateral or other private sewer assets.

RWQCB Within 24 hours for
discharges that exceed
1,000 gallons, result in
a discharge to a
drainage channel
and/or surface water;
and/or discharge to a
storm drain pipe that
was not fully captured
and returned to the
sanitary sewer system.

Private lateral sewage discharges are
encouraged to be reported to the online
CIWQS Sanitary Sewer System Database
based upon the SDRWQCB order. The
Enrollee must identify the sewage
discharge as occurring and caused by a
private lateral, and a responsible party
should be identified, if known.

No Spill or Category 4 Spill Report CIWQS Monthly “No Spill” or “Category 4 Spill” Certification:

Certify that no spills occurred within 30
calendar days of the end of the month in
which no spills occurred or certify that only
Category 4 spills occurred.
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Table 2-4 lists the contact information for the various agencies that may require notification of a spill.

Table 2-4. Contact Information for Notification and Reporting Normal Hours After Hours
SDCDEH – (858) 505-6900 (Duty Specialist) or (858) 505-6903 (Complaint Line) 24 hours RWQCB – San Diego Region 9 (619) 516-1990 or (858) 467-2952 24 hours Cal-OES – (800) 852-7550 24 hours
Vista Sheriff’s Department – Watch Commander (760) 940-4551 24 hours

References for Further Information
• Attachment B – Organization Names and Contact Information • Attachment F1 – Spill Emergency Response Plan

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3 Legal Authority

3.1 Overview
The City and District’s Legal Authorities satisfy the requirements of the General Order and are included in the City’s Municipal and Development Codes, as well as the District’s Sewer Code of Regulations. This chapter describes the legal authority to implement the SSMP plans and procedures.

CITY OF VISTA
The primary statute governing the authority of the City to operate and maintain a sewer system is in California Government Code Section 38900. The City has adopted local ordinances governing all aspects of the use and operation of its sewer systems.

In addition to the ordinances adopted by the City, use of the sewerage system is also regulated by EWA. Wastewater generated by users within the jurisdiction of the City ultimately flows to EWPCF for treatment prior to discharge into the ocean outfall. EWA has adopted pre-treatment ordinances which apply to all City industrial users and EWA has assumed the lead in enforcing its ordinance through the issuance of Industrial Waste Discharge Permits. The City cooperates with EWA in the enforcement process.

Additionally, the City may prosecute violations of its Municipal Code by criminal complaint, and such violations constitute a misdemeanor under Chapter 13.08 of the Vista Municipal Code.

The City, EWA, and County have a number of legal tools to prevent illegal discharges; authority to collaborate with storm sewer agencies; authority to require proper design and construction of sewers; authority to ensure access to publicly owned portions of laterals; authority to limit the discharge of FOG and other debris; authority to enforce violations of sewer ordinances; and authority to obtain easement accessibility agreements when applicable.

To be in full compliance with the General Order, the City has revised and adopted Title 14, Sewer System of the City’s Municipal Code. These revisions have clarified and strengthened the City’s Municipal Code providing the required legal authority to efficiently manage, operate, maintain and fund its sanitary sewer system. Additionally, the City has adopted the current version of the California Plumbing Code (CPC).

Table 3-1 identifies linkages to the City of Vista Municipal and Development Code. The remainder of this section details the legal authorities the City has in place to support management, operation, and maintenance of the sewer system.

BUENA SANITATION DISTRICT
The District is organized and operated under the authority of the County Sanitation District Act, being Chapter 3 of Part 3, Division 5 of the California Health and Safety Code, commencing with Section 4700. The District has adopted local ordinances governing all aspects of the use and operation of its sewer systems.

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District ultimately flows to EWPCF for treatment prior to discharge into the ocean outfall.

EWA has adopted pre-treatment ordinances which apply to all industrial users and EWA has assumed the lead in enforcing its ordinance through the issuance of Industrial Waste Discharge Permits. The District cooperates with EWA in the enforcement process.

Additionally, the District may prosecute violations of its Sewer Code of Regulations by criminal complaint.

The District, EWA, and County have a number of legal tools to prevent illegal discharges; authority to collaborate with storm sewer agencies; authority to require proper design and construction of sewers; authority to ensure access to publicly owned portions of laterals; authority to limit the discharge of FOG and other debris; authority to enforce violations of sewer ordinances; and authority to obtain easement accessibility agreements when applicable.

To be in full compliance with the General Order, the District has revised and adopted Chapters 1 through 16 of the Buena Sanitation District Sewer Code of Regulations.

These revisions have clarified and strengthened the District’s Sewer Code of Regulations providing the required legal authority to efficiently manage, operate, maintain, and fund its sanitary sewer system.

Table 3-1 identifies linkages to the Buena Sanitation District’s Sewer Code of Regulations. The remainder of this section details the legal authorities the City has in place to support management, operation, and maintenance of the sewer system.

Table 3-1. Summary of City Legal Authorities
Requirement Reference in City Municipal
and Development Code
Reference in District
Sewer Code of
Regulations
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
Municipal Code Title 14, Chapter

14.02, Section 14.02.090 Chapter 2, Section 2.090
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 Engineering
Department is also responsible
for stormwater system
maintenance. These business
units share resources and
coordinate closely.

The City’s permit, design review,
and construction inspection
processes are the primary
means for preventing
unintentional cross connections.

All sewers and
connections designed
and constructed in the
District are overseen by
the City. The City's
permit, design review,
and construction
inspection processes are
the primary means for
preventing unintentional
cross connections.

Require that sewers and connection be properly
designed and constructed

Municipal Code Title 14, Chapter

14.14; Title 14, Chapter

14.08.040; Development Code
Title 16, Chapter 16.32; Title 16,
Chapter 16.04

Chapter 8, Section 8.040;
Chapter 14
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Requirement Reference in City Municipal
and Development Code
Reference in District
Sewer Code of
Regulations
Ensure access for maintenance, inspection, or
repairs for portions of the service lateral owned or
maintained by the Agency
City of Vista does not own any
portion of a private house
connection (i.e., sewer lateral)
constructed for the sole use of
private property. State
Constitution and Law of
Easements.

Buena Sanitation District
does not own any portion
of a private house
connection (i.e., sewer
lateral) constructed for
the sole use of private
property. Chapter 14,
Section 14.080
Enforce any violations of its sewer ordinances,
service agreements, or other legally binding
procedures
Municipal Code Title 14, Chapter

14.01, Section 14.01.40; Title
14, Chapter 14.01, Section

14.01.110
Chapter 1, Section

01.040; Chapter 1,
Section 01.110
Obtain easement accessibility agreements for
locations requiring sewer system operations and
maintenance, as applicable
See Section 3.8 below See Section 3.8 below
Limit the discharge of FOG and other debris that
may cause blockages
Municipal Code Title 14, Chapter

14.12; Title 14, Chapter 14.12,
Section 14.12.030
Chapter 12, Section

12.030
Control infiltration and inflow (I/I) from private
service laterals
Municipal Code Title 14,
Chapter 14.14, Section

14.14.040; Title 14, Chapter

14.14, Section 14.14.050
Chapter 14, Section

14.14.040; Chapter 14,
Section 14.14.050
Requirements to install grease removal devices
(such as traps or interceptors)
Municipal Code Title 14, Chapter

14.12, Section 14.12.060
Chapter 12, Section

12.090
Design standards for the grease removal devices Municipal Code Title 14, Chapter

14.12, Section 14.12.090
Chapter 12, Section

12.090
Maintenance requirements, BMP requirements,
record keeping and reporting requirements for
grease removal devices
Municipal Code Title 14, Chapter

14.12, Section 14.12.100; Title
14, Chapter 14.12, Section

14.12.100; Title 14, Chapter

14.12, Section 14.12.110; Title
14, Chapter 14.12, Section

14.12.120
Chapter 12, Section

12.100; Chapter 12,
Section 12.110; Chapter
12, Section 12.120
Authority to inspect grease producing facilities Municipal Code Title 14, Chapter

14.12, Section 14.12.140
Chapter 12, Section

12.130; Chapter 12,
Section 12.170

3.2 Authority to Prevent Illicit Discharge and
Infiltration/Inflow

CITY OF VISTA
Title 14, Chapter 14.02, General Sewer Regulations, Section 14.02.090, Restrictions Relating to Use of Public Sewers of the City’s Municipal Code, specifically prohibits illicit discharges into the City’s sanitary sewer system.
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Additionally, EWA has also enacted ordinances regulating the discharges to the sewerage system. Businesses are required to obtain an Industrial Waste Discharge Permit and comply with all EWA regulations.

BUENA SANITATION DISTRICT
Chapter 2, General Sewer Regulations, Section 2.090, Restrictions Relating to Use of Public Sewers of the District’s Sewer Code of Regulations, specifically prohibits illicit discharges into the District’s sanitary sewer system.

Additionally, EWA has also enacted ordinances regulating the discharges to the sewerage system. Businesses are required to obtain an Industrial Waste Discharge Permit and comply with all EWA regulations.

3.3 Authority to Collaborate with Storm Sewer Agencies
0The City owns all storm sewer infrastructure and collaborate internally with staff when accessibility is needed. All internal agencies are expected to keep open lines of communication and access support with the City and District to ensure effective collaboration during spill events. If a spill does discharge into the unincorporated County of San Diego or a neighboring agency served by the District, the District has the means to enter and begin spill responses activities as described in Attachment F1. The City or District will notify the infrastructure owner accordingly.

3.4 Authority to Require Proper Design and Construction of Sewers

CITY OF VISTA
Chapter 16.32 of the City of Vista Development Code is the adoption of the California Plumbing Code that establishes specifications for the design and construction of sewer facilities. Chapter 16.04 – Standards for Public Works Construction (Greenbook) requires new sewer construction to meet State and local standards. Design standards are enforced during the review of sewer construction drawings based on standard sewer notes, conditions of approval, and other locally published design standards.

Title 14, Chapter 14.14 prescribes how private sewer laterals are to be designed, constructed, and connected to the public collection system. Completed private sewer laterals and privately constructed sewer mains for public use are required to be inspected prior to final permit approval. Chapter 14.14 also establishes standards for maintenance of private laterals. Failure to maintain a private sewer lateral may constitute a public nuisance and may be enforced as set forth in Chapter 14.14.

Title 14, Chapter 14.08 Extension and Enlargement of Sewer Mains, Section 14.08.040 requires that sewer mains shall be designed and constructed to public standards according to the current version of the City of Vista Sewer Design Manual.

BUENA SANITATION DISTRICT
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Construction (Greenbook) that requires new sewer construction to meet State and local standards. Design standards are enforced during the review of sewer construction drawings based on standard sewer notes, conditions of approval, and other locally published design standards.

Chapter 8, Extension and Enlargement of Sewer Mains, Section 8.040 requires that sewer mains shall be designed and constructed to public standards according to the current version of the City of Vista Sewer Design Manual.

Chapter 14 prescribes how private sewer laterals are to be designed, constructed, and connected to the public collection system. Completed private sewer laterals and privately constructed sewer mains for public use are required to be inspected prior to final permit approval. Chapter 14 also establishes standards for maintenance of private laterals.

Failure to maintain a private sewer lateral may constitute a public nuisance and may be enforced as set forth in Chapter 14.

3.5 Authority to Ensure Access to Publicly Owned Portion of Lateral

CITY OF VISTA
Private laterals are the responsibility of the private property owner to the point of connection (including the connection) to the public sewer main per City ordinances.

Therefore, public access to these laterals is not necessary. The City maintains only those sewer laterals connecting City facilities or buildings. Such facilities are located on publicly owned land or within publicly owned easements and are thereby legally accessible. In the rare case that a private property owner fails to repair a damaged sewer lateral and the damage poses a danger to the community, the City has enforcement power authority granted to them under the State constitution to enter the property and take such actions to protect the community.

Since approximately 1980, the City intends all-weather, 24-hour, drivable access to all public manholes and cleanouts in the system for new and existing systems as part of all new construction as a condition of project approval. Most of the City’s sewer mains are located in the public ROW or in private roads encumbered with a clear public utility easement allowing access for inspection and maintenance.

Some older public sewer mains located on private property were constructed in public sewer easements following a natural drainage swale to take advantage of the topography. Over time, some private property owners have encroached into the public sewer easements with fences and landscaping obstructing the City access to the sewer mains. When such problems have been discovered, the City has been proactive in working with property owners to reopen public access and prevent further encroachments.

The City has completed an inventory to plot all available easements using GIS from record maps, drawings, and recorded easements. Easement deficiencies are identified and corrected as part of any CIP project with such an easement within the project boundaries or during the course of maintenance scheduling. A process is in place for field personnel to report access restrictions to the Engineering department for inventory and easement expansion. Engineering will inform property owners of easement 04/22/2025
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requirements to address deficiencies, and work with the Code/City Attorney office as needed to enforce compliance of access requirements / removal of private improvements causing restrictions.

Ultimately, the City has the necessary legal authority under the law of easements to remove any encroachment from a public sewer easement by civil action if the property owner is uncooperative.

BUENA SANITATION DISTRICT
Private laterals are the responsibility of the private property owner to the point of connection (including the connection) to the public sewer main per the District’s Sewer Code of Regulations. Therefore, public access to these laterals is not necessary. The District maintains only those sewer laterals connecting District facilities or buildings.

Such facilities are located on publicly owned land or within publicly owned easements and are thereby legally accessible. In the rare case that a private property owner fails to repair a damaged sewer lateral and the damage poses a danger to the community, the District may enact enforcement as provided in Chapter 14, Section 14.080 of the Sewer Code of Regulations to protect the community.

The District intends all-weather, 24-hour, drivable access to all public manholes and cleanouts in the system for new and existing systems as part of all new construction and as a condition of project approval. Most of the District’s sewer mains are located in the public ROW or in private roads encumbered with a clear public utility easement allowing access for inspection and maintenance.

There are some older public sewer mains located on private property which were constructed in public sewer easements following a natural drainage swale to take advantage of the topography. Over time, some private property owners have encroached into the public sewer easements with fences and landscaping, obstructing District access to the sewer mains. When such problems have been discovered, the District has been proactive in working with property owners to reopen public access and prevent further encroachments.

The District has completed an inventory to plot all available easements in the GIS from record maps, drawings, and recorded easements. Easement deficiencies are identified and corrected as part of each CIP project. A process is in place for field personnel to report access restrictions to the City of Vista Engineering Department for inventory and easement expansion.

Ultimately, the District has the necessary legal authority under the law of easements to remove any encroachment from a public sewer easement by civil action if the property owner is uncooperative.

3.6 Authority to Limit the Discharge of FOG and other
Debris
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CITY OF VISTA
Title 14, Sewers and Sewer Systems of the City’s Municipal Code, Chapter 14.12 Control and Regulation of Fats, Oils, and Grease establishes the legal authority for the City’s FOG Control Program. FOG discharges that cause or contribute to a blockage are prohibited (Section 14.12.030).

Food service establishments (FSEs) are required to control their FOG discharge through the use of grease control devices and best management practices (BMPs). Section

14.12.090 Grease Control Device Design Requirements establishes the requirements with Section 14.12.100 establishing maintenance requirements. Compliance is enforced through Section 14.12.130 utilizing onsite inspections and sampling with Section

14.12.170 providing penalties for violations.

BUENA SANITATION DISTRICT
Chapter 12, Control and Regulation of Fats, Oils, and Grease (FOG) establishes the legal authority for the City’s FOG Control Program. FOG discharges that cause or contribute to a blockage are prohibited (Section 12.030). FSEs are required to control their FOG discharge through the use of grease control devices and BMPs. Section

12.090, Control Device Design Requirements, establishes the requirements, with Section

12.100 establishing maintenance requirements. Compliance is enforced through Section

12.130, utilizing onsite inspections and sampling with Section 12.170, providing penalties for violations.

3.7 Authority to Enforce Violations of Sewer Ordinances

CITY OF VISTA
Title 14, Chapter 14.01, General Provisions provides the City with the legal authority to enforce the regulations for its sanitary sewer system. Section 14.01.040, Administration:

Enforcement grants the City Engineer the responsibility to administer, implement, and enforce the provisions of Title 14. Additionally, the Code Enforcement Manager shall have the authority to enforce the provisions of Title 14. Section 14.01.110, Penalties for Violation: Reimbursement of City Costs discusses the penalties for violations including termination of service, administrative citations, and criminal prosecution.

BUENA SANITATION DISTRICT
Chapter 1, General Provisions, provides the City with the legal authority to enforce the regulations for its sanitary sewer system. Section 01.040, Administration: Enforcement grants the District Engineer the responsibility to administer, implement, and enforce the provisions of the Sewer Code of Regulations. Section 01.110, Penalties for Violation:

Reimbursement of District Costs discusses the penalties for violations including termination of service and criminal prosecution.

3.8 Authority to Obtain Easement Accessibility
Agreements When Applicable
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easements. Easement deficiencies are identified and corrected as part of each CIP projects or during the course of maintenance scheduling. A process is in place for field personnel to report access restrictions to the Engineering department for inventory and easement expansion. The City has the necessary legal authority under the law of easements to remove any encroachment from a public sewer easement by civil action if the property owner is uncooperative.

In addition, easement accessibility agreements are in place for locations requiring operations and maintenance. Operations have special equipment for difficult to reach locations and maintains informal agreements with property owners where needed that adequately allow maintenance. Operations is not aware of any locations where easement accessibility is an issue.

References for Further Information

CITY OF VISTA
City ordinances have been codified into Title 14 of the Municipal Code and Title 16 of the Development Code to provide the City with the legal authority to manage, operate, maintain, and fund its sanitary sewer system. These Titles and other Ordinances adopted to amend existing ordinances may be reviewed at the City of Vista, located at 200 Civic Center Drive in Vista, California, or on the internet at the City’s websites below:
• City of Vista Municipal Code (TITLE 14 SEWER SYSTEM)
• City of Vista Development Code (TITLE 16 BUILDING)

BUENA SANITATION DISTRICT
The Buena Sanitation District Sewer Code of Regulations has been revised and adopted to provide the District with the legal authority to manage, operate, maintain, and fund its sanitary sewer system. The Sewer Code of Regulations and other ordinances adopted to amend existing ordinances may be reviewed at the City of Vista, located at 200 Civic Center Drive in Vista, California, or on the internet at the City’s website below:
• Buena Sanitation District Sewer Code of Regulations (BSD CODE OF

REGULATIONS)

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4 Operation and Maintenance Program
The following sections reference the City; however, since the City is also responsible for District assets, the sections apply to both.

4.1 Up-to-Date Map of the Collection System
The City maintains a comprehensive set of sewer maps that document all features of the sanitary system. These maps have been converted into GIS, allowing staff to keep them up to date and readily accessible for field operations. Crews use GIS to locate pipelines, maintenance holes, service connections, and other critical infrastructure. A major GIS update was completed at the end of 2023, improving data accuracy and system usability.

To provide redundancy and accessibility, hard copies of updated GIS maps are regularly maintained and posted at Wastewater Operations and the Engineering Department.

Additionally, all City sewer response vehicles carry updated hard copy GIS maps. A continuous update process is in place to incorporate system modifications into GIS, which will be further refined with the CityWorks reimplementation. All wastewater operations crews are equipped with tablets with cellular data access, allowing real-time digital GIS viewing through CityWorks in the field.

The Wastewater Division collects and tracks data on access restrictions to determine where improvements are most needed. Engineering uses access condition assessments along with spill data from Public Works to guide easement acquisitions and update the CIP.

Each year, the Engineering Division reviews and updates priorities for system improvements and ROW acquisitions, aligning them with the City's CIP budget cycles.

This approach helps direct resources to locations that require better access and operational improvements.

4.1.1 Access to Up-to-Date Mapping
SWRCB or Regional Water Board staff can gain access to system mapping by contacting the LRO for the City, using the contact information provided in Section 2.2

4.2 Operation and Maintenance Program Activities
The City employs several sewer maintenance program strategies to manage the collection system, and uses a CMMS and Standard Operating Procedures, along with equipment-specific manuals, to guide the frequency of sewer cleaning and pump station maintenance. Task schedules are based on operational experience, past performance, manufacturer recommendations, and site-specific conditions.

The City’s maintenance program includes preventive, proactive, and corrective maintenance. Table 4-1 outlines operation and maintenance program activities, the three bullets specified in the General Order, and the scheduling and data collection system used. The following sections describe each operation and maintenance program activity in more detail.
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Table 4-1. Summary of Operation and Maintenance Activities Operation and Maintenance Program
Activity
Inspection
and
Maintenance
Activity
Higher-
Frequency
Activities of
Problem
Areas
Regular
Visual and
CCTV
Inspections
Scheduling and
Data Collection
System
Gravity Main Cleaning - Small Diameter ✓ CityWorks
Gravity Main Cleaning - Larger Diameter
(>15 inches): ✓ CityWorks
Root Control Strategy for Areas with
Heavy Roots
✓ CityWorks
Enhanced Maintenance Area Program
Cleaning ✓ ✓ CityWorks
CCTV Inspections ✓ ✓ CityWorks and
WinCan
Flow Level Monitoring ✓ ✓ CityWorks

The City employs several sewer maintenance program strategies to manage collection system performance. These strategies include:

Gravity Main Cleaning – Small Diameter: The City utilizes three combination jetter/vacuum trucks and crews to clean and maintain small diameter gravity mains. A fourth combination jetter/vacuum truck is used for miscellaneous maintenance support roles and is rotated into the routine cleaning and maintenance schedule when one of the other combination jetter/vacuum trucks is out for service. The City follows a basin-based cleaning approach. Cleaning crews systematically clean all collection pipelines with a diameter of 15 inches or less within an 18-month cycle.

Gravity Main Cleaning – Large Diameter (Greater than 15 inches): The City follows a 5-year cleaning cycle for large-diameter pipelines (greater than 15 inches). In general, the City utilizes contractors to clean pipelines 21 inches and larger. Cleaning is typically scheduled based on findings from CCTV inspections, ensuring targeted maintenance for optimal system performance.

Root Control Strategy for Areas with Heavy Roots: The City’s root control strategy is ongoing, with known root-intrusion areas identified throughout the system and placed on Enhanced Maintenance Areas (EMA). Pipelines affected by root intrusion and other structural defects are prioritized within the CIP for rehabilitation or replacement. The CIP list includes these pipelines, ensuring a proactive approach to mitigating root-related blockages and system deterioration.

Enhanced Maintenance Area Program Cleaning: The City has implemented an EMA Program to address sewer lines prone to blockages caused by FOG or root intrusion.

These areas prone to blockages are actively monitored, with work orders generated at increased frequencies to prevent service disruptions. EMAs are cleaned on a quarterly basis or more frequently as needed to maintain system reliability.

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Siphon Cleaning and Inspection: The City cleans its sole double barrel siphon as part of its 18-month city-wide cleaning cycle. The siphon is currently on the City’s 15-year CCTV inspection interval which is being re-evaluated for enhanced preventive maintenance activities through the Cityworks re-implementation effort.

CCTV Inspection: The City uses CCTV inspection to evaluate sewer pipelines and stores all data in WinCan. Pipeline inspection observations are documented using the National Association of Sewer Service Companies (NASSCO) Pipeline Assessment Certification Program (PACP) coding system. The City has one in-house CCTV crew focused on investigative inspections and quality control inspections of sewer cleaning activities.

Additionally, the City has one mobile CCTV unit that can be transported on various vehicles and used by any crew when needed.

Flow Level Monitoring: The City utilizes flow level monitoring sensors strategically placed in high-priority areas where there is an increased risk of surcharging, infiltration, or structural deterioration. These sensors help identify pipes requiring rehabilitation, and once repairs are completed, the sensors are relocated to other critical locations.

Currently, the City operates 16 flow level monitoring devices and 2 hydrogen sulfide (H₂S) meters to track sewer conditions. While H₂S is present in certain areas, it is monitored to mitigate potential corrosion and odor issues.

Per agreements with the City and District, EWA operates and maintains the City’s and District’s pump stations. The City has entered into a revised Memorandum of Understanding (MOU) for operation and maintenance of each of the pump stations. The revised MOU includes development of an Operations and Maintenance (O&M) Manual, Asset Management Plan (AMP), Pump Station Quarterly Report that list all operation and maintenance activities and pump station performance, and an Annual Report summarizing the Pump Station Quarterly Report with recommendations for capital improvements and major equipment replacements for the next 5 years.

4.3 Training
The City supports staff advancement through training and certification pathways, quarterly staff meetings and collection system program trainings. • Crew Training and Certification Paths – The City maintains a list of the training completed by staff. Included is CWEA Operator Certification Program Training is part of various City programs and includes formal classroom and informal on-the- job and hands-on training. Qualified City staff and outside training workshops are utilized. Training courses are added or existing courses revised to comply with new requirements or to incorporate changing technologies, including computer aided or online training programs.
• Quarterly Staff Meetings – The City is committed to reducing the impacts of spills on the community and environment and with maintaining spill response readiness through quarterly staff training. These meetings serve as a platform to review recent spill events, evaluate response efforts, and address any operational challenges encountered. In addition to spill-related discussions, staff review planned maintenance activities, assess the use of data collection tools 04/22/2025
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such as CityWorks and WinCan, and discuss broader City-wide issues that may impact field operations.
• Collection System Program Trainings – Table 4-2 summarizes the collection system program training activities.

Table 4-2. Summary of Collection System Program Training Activities Training
Type
Description Recurrence
General
Order
Requirements
Internal review with staff. Annual
Spill
Emergency
Response
All crews responsible for responding to sewer spills
receive training on response and reporting protocols, and volume estimation methods. Re-training is provided when significant updates to standard procedures are made.

After action reviews on spill response are conducted
when a spill has occurred.

On-boarding for new employees,
annually for all staff
Spill Volume
Estimation
All crews responsible for responding to sewer spills
participate in table top spill response training, which includes response and reporting protocols, and volume
estimation methods.

On-boarding for new employees,
annually for all staff
Electronic
CIWQS
Reporting
The primary method for electronic CIWQS reporting
training is through on-the-job training with experienced data submitters showing new data submitters how to
enter reporting data.

As needed
Pump Station
Spill
Response
The City and District conduct annual pump station spill response drills in collaboration with EWA. These
exercises are designed to coordinate interagency
responsibilities, improve communication, and ensure a
unified and effective response to potential spill events.

Annual
Safety Safety training is integral to City’s training program. All staff receive formal classroom training on important
safety topics. (e.g. hazardous material management).

Crews are not allowed to begin work until proficiency is demonstrated. Training on a variety of safety topics is performed monthly
On-boarding for new employees,
and monthly for all staff
Equipment Crews are initially trained in the proper operation and maintenance of all new major mobile equipment and
facilities by the contractor/manufacturer.

During Onboarding and On-the-Job
SOPs On-the-job and classroom training for standard operating procedures is provided for the following functions: Sewer Cleaning, CCTV, and Repair.

During Onboarding and On-the-Job.

Additional trainings performed as-
needed at tailgate trainings.

4.4 Equipment Inventory
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4.4.1 Gravity Pipelines
The City and District sewer systems are comprised of various standard sized gravity pipelines and do not contain any other unique facilities. The Vista Wastewater Operations Department maintains an electronic inventory of mobile equipment necessary for day-to-day operations and emergency response. This up-to-date inventory of equipment and replacement parts is maintained in an area easily accessible to all crews and is on hand for their specific duties. Replacement parts and supplies are maintained at the District’s Buena Yard Facility. Parts that are needed for preventive maintenance are identified and secured ahead of time for each specific maintenance task.

The City maintains trash pumps and hoses for bypassing flow during emergencies, which are among the most critical pieces of equipment for spill response. All bypass equipment is managed in-house, with the City's Fleet Department responsible for maintaining the trash pumps.

4.4.2 Pump Station Equipment and Replacement Part Inventory EWA separately maintains equipment inventories for the pump stations they operate and maintain on behalf of the City and District. Major pump station components are itemized as part of their Remote-Comprehensive Asset Management Plan (R-CAMP) document.

Additionally, EWA utilized a CMMS system that includes a warehousing module for inventory management of all pump station replacement parts.

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5 Design and Performance Provisions

5.1 Design and Performance Summary
City of Vista
The City has developed the City of Vista Standard Specifications and Procedures for Privately Constructed Wastewater Facilities to ensure consistency in the design and construction of collection system facilities within the City of Vista and the Buena Sanitation District. Referred to as the Vista Standard Spec, this document is based upon and is in reference to the latest edition of the Standard Specification for Public Works Construction (Greenbook), as prepared and published by Public Works Standards, Inc.

The Vista Standard Spec provides a supplement to the Greenbook adopted by the City and provides the specifications to be used to establish standards of work, material and construction procedures for improvements to the sanitary collection system within jurisdiction of the City of Vista and the Buena Sanitation District.

All design work for City must be done by a professional California registered engineer and all contractors must be licensed and insured.

Buena Sanitation District
All construction, repair and rehabilitation work performed for the Buena Sanitation District must be in strict compliance with the City of Vista Standard Specifications and Procedures for Privately Constructed Wastewater Facilities and the Greenbook.

Construction and repair or rehabilitation work performed for the District is conducted under the oversight of the City of Vista.

All design work for the District must be done by a professional California-registered engineer, and all contractors must be licensed and insured.

5.2 Procedures and Standards for Inspecting and Testing System Improvements

CITY OF VISTA
All construction and repair or rehabilitation projects must be completed in accordance with the Vista Standard Spec prior to dedication or acceptance by the City. Detailed instructions and methodologies for the inspection of construction, repair and rehabilitation projects are provided in the Vista Standard Spec.

All contractors responsible for installing new pipelines or rehabilitating existing pipelines must perform a CCTV inspection to verify proper installation. The inspection should document the condition of the pipeline and confirm compliance with project specifications. Any defects or deficiencies identified during the inspection must be addressed before final acceptance.
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BUENA SANITATION DISTRICT
All construction and repair or rehabilitation projects must be completed in accordance with the Vista Standard Spec prior to dedication or acceptance by the City. Detailed instructions and methodologies for the inspection of construction, repair and rehabilitation projects are provided in the Vista Standard Spec.

Construction and repair or rehabilitation work performed for the District is conducted under the oversight of the City of Vista, which includes overseeing and accepting all work performed by contractors.

References for Further Information
The documents used for design and performance evaluations include the following:
• City of Vista Design Standard and Procedures for Wastewater Facility Projects • Standard Specification for Public Works Construction (Greenbook) 04/22/2025
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6 Spill Emergency Response Plan

CITY OF VISTA
The City has developed a SERP documenting response protocol from call receipt through clean-up and reporting. The City’s SERP meets the requirements of the General Order. The SERP is updated with current information on a regular, ongoing basis. The latest version is included in 0 of this SSMP.

The City’s SERP works in conjunction with the City’s Standardized Emergency Management System (SEMS) and the National Incident Management System (NIMS) programs. When responding to a spill the first crewperson on scene assumes the responsibility of Incident Commander, evaluates the situation and communicates with the supervisor (Incident Coordinator) to ensure adequate resources are dispatched. The City can dispatch up to three jet-vacuum trucks to remediate the spill. As additional crews arrive on scene, the Incident Commander will assign them to remediating the cause of the spill, spill recovery or clean up. This approach is designed to provide the most efficient use of available resources to quickly remediate the spill and its impact on the environment. When applicable, spill areas are cordoned off to prevent public contact, If needed, local law enforcement is requested and dispatched for additional traffic or crowd control.

The City’s SERP provides detailed procedures for City employees responding to spills during or after normal working hours. Contact information is included for all agencies and personnel that require notification in the event of a sewage spill. Posting of warning signs and sampling procedures are covered. Notification and reporting are an important aspect of the City’s response procedures. Compliant with the General Order, the City notifies the Office of Emergency Services, San Diego County Department of Environmental Health and the San Diego Regional Water Quality Control Board of any spills that discharge to a drainage channel or surface waters within 2 hours of becoming aware of the spill.

The City certifies within 24 hours to the San Diego Regional Water Quality Control Board that the appropriate notifications have been completed. The City reports all spills, public and private, as required by the General Order and SDRWQCB Order R9-2007-0005, to the CIWQS Sanitary Sewer System Database. All Category 1 spills or spills greater than or equal to 1,000 gallons are reported to the San Diego County Department of Environmental Health.

The City provides training on spill response consisting of classroom and field activities.

Additionally, the City participates in annual spill drills with both the City of Carlsbad and EWA. These spill drills focus on training for spills that might occur at lift stations or force mains that are owned or joint owned by the City of Vista but maintained by EWA or Carlsbad. The City’s role is supportive as depending upon where the spill occurred; EWA would be the first responder to all pump stations and Carlsbad would be first responder to all Vista-Carlsbad Interceptor (VC) downstream of VC-1 reach. 04/22/2025
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A copy of the SERP is provided to each crew person and a copy is kept in each of the response vehicles. The City has developed a Spill Response Quick Reference Guide that highlights the key issues of the SERP for easy reference by response crews.

BUENA SANITATION DISTRICT
The SERP is a joint document and covers the City of Vista and the Buena Sanitation District. All spill response, notification, and reporting is the responsibility of the City of Vista staff for all spills, public and private, that occur within the District.

6.2 Annual Review and Update
The City reviews and assesses the effectiveness of the SERP annually and updates the Plan as needed. In addition to these annual reviews, Engineering and O&M teams meet quarterly to review past spill events, assess standard work practices and procedures, and identify potential improvements. Meeting minutes are documented, and any necessary procedural updates are implemented accordingly.

References for Further Information
• SERP – Located in Attachment F1
• Spill Response Quick Reference Guide – Located in Attachment F2 • Training Records – Located at the Wastewater Operations Division and documented in CityWorks

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7 Sewer Pipe Blockage Control Program

7.1 Program Overview

CITY OF VISTA
To comply with the General Order and establish a sound legal authority for the control of FOG generated within the City, the City has revised and adopted Title 14, Sewers and Sewer Systems, of the City’s Municipal Code in April 2009. Chapter 14.12 Control and Regulation of FOG establishes the legal authority for the City’s FOG Control Program.

Most recently, the City updated the Municipal Code in January 2014 to align its FOG program with the most recent California Plumbing Code.

The revised ordinance requires new and existing FSEs who are applying a plumbing permit to install grease control devices, implement kitchen BMPs, and provides for inspections and enforcement.

The City’s FOG Control Program is designed in accordance with Chapter 14.12 of the City’s Municipal Code and is implemented under the direction of the City’s Sewer Engineering Division Manager in the Sewer Engineering division. The City’s Stormwater Program Manager coordinates all inspection of FSEs. The Sewer Engineering Division Manager in Sewer Engineering works closely with the Stormwater Program Manager to develop an inventory of FSEs for inspections, review inspection reports, and develop any enforcement actions. The Sewer Engineering Manager in Sewer Engineering also works closely with the Wastewater Supervisor to coordinate FOG-related maintenance activities.

Currently, the Wastewater Division is cleaning all collection system pipelines at least once every 18 months with pipelines in EMAs being cleaned every 3 months. Some of the pipe segments included in the EMAs are prone to FOG accumulation and the enhanced cleaning reduces the potential for FOG-related blockages. The City contracts on-site FOG inspections of FSEs. Inspections are being conducted in conjunction with the City’s Stormwater Program which has its own FOG component as part of the City’s Stormwater National Pollution Elimination Discharge System (NPDES) permit. All FSEs have been identified and included on a GIS layer. Currently, the City has approximately 600 FSEs. Figure 7-1 is an overview of the FOG Program implementation schedule. 04/22/2025
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Figure 7-1. FOG Program Development Overview

BUENA SANITATION DISTRICT
To comply with the General Order and establish a sound legal authority for the control of FOG generated within the District, the District has revised and adopted the Buena Sanitation District Code of Regulations in April 2009. Chapter 12, Control and Regulation of Fats, Oils, and Grease, establishes the legal authority for the District’s FOG Control Program. This change to the District’s Code of Regulations occurred in April 2009.

Most recently, the District updated a revised Code of Regulations to align its FOG program with the most recent California Plumbing Code.
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The revised ordinance requires new and existing FSEs that apply for a plumbing permit to install grease control devices, implement kitchen BMPs, and provides for inspections and enforcement. The District’s FOG Control Program is designed in accordance with Chapter 12 of the District’s Code of Regulations and is implemented under the direction of the City of Vista’s Sewer Engineering Division Manager the Sewer Engineering division. The City of Vista’s Stormwater Program Manager coordinates all inspection of FSEs. The Sewer Engineering Division Manager in the Sewer Engineering division works closely with the Stormwater Program Manager to develop an inventory of FSEs for inspections, review inspection reports and develop any enforcement actions. The Sewer Engineering Division Manager in Sewer Engineering also works closely with the City of Vista’s Wastewater Supervisor to coordinate FOG-related maintenance activities. The City of Vista contractors on-site FOG inspections of FSEs. FOG-related maintenance is performed by the City of Vista’s Wastewater Division.

7.2 Implementation Plan and Schedule for Public Outreach

CITY OF VISTA
An education and outreach program has been implemented as part of the FOG control program and is shown in Figure 7-2. Target audiences include applicable City and District staff, FOG-generating businesses and facilities, and residents. Educational materials and presentations may contain information on the State regulations, revised City ordinance and compliance requirements, sanitary sewer system overview, FOG impacts to the system, business and residential BMPs, disposal options, and source control measures.

Materials will be developed in English and Spanish as needed. Many of the City’s existing educational materials contain BMP information and may be updated to include specific FOG control BMPs. Additionally, the City will compile a list of potential FOG hauling and disposal companies to assist businesses and residents in contracting these services.

General information about eliminating fats, oils, grease, rags and debris discharges into the sewer system is among the information provided on the following website:
https://www.vista.gov/departments/engineering/construction-projects/sewer/fats-oils- grease-fog.

The City will use various methods to disseminate program information. Printed materials may be distributed via sewer billings, direct mail, newsletters, and inspections, at local community events and FOG business forums (e.g., the Restaurant Association), and posted on the City website. Information on specific design standards will be provided to project proponents at the planning and submittal phases of their projects and posted on the website. All public information will be coordinated with the City’s Communications Officer.

As part of the program, all FSEs are required to sign an “Acknowledgement of Control and Regulation of Fats, Oil, and Grease” form, which permits unannounced, periodic inspections to verify compliance with the City’s municipal code or the District Sewer Code of Regulations.

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opportunity for education, as they allow one-on-one interactions and deal directly with specific requirements and practices for the business.

Additional educational opportunities exist through the City’s website, press releases, and City Council sessions (e.g., the State of City address, ordinance readings, etc.). These will be coordinated with the City Communications Officer.

Figure 7-2. Education and Outreach Schedule

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BUENA SANITATION DISTRICT
Public outreach and education is conducted by the City of Vista within the District’s jurisdiction using the same strategies and approaches employed within the City service area.

7.3 Plan and Schedule for FOG Disposal within the
Service Area

CITY OF VISTA
The City does not provide FOG disposal services for private businesses and property owners. It is the responsibility of the private business and property owner to hire a licensed grease hauler as needed. However, the City will keep a list of licensed grease haulers and will provide this information to FSEs and residents as needed during inspections and site visits.

All companies doing business in California that transport inedible kitchen grease must obtain a registration sticker for each of their trucks from the Department of Food and Agricultural pursuant to provisions of the Food and Agriculture Code as well as the vehicle code. Those companies doing business within Vista must also obtain a business license from the City.

The City requires FSEs to keep records of where the grease hauler disposes of the waste and that it is disposed of properly. EWA currently accepts hauled FOG waste for disposal at EWPCF’s digester to assist with methane production.

BUENA SANITATION DISTRICT
The District does not provide FOG disposal services for private businesses and property owners. It is the responsibility of the private business and property owner to hire a licensed grease hauler as needed. However, the City of Vista will keep a list of licensed grease haulers and will provide this information to FSEs and residents of the District as needed during inspections and site visits. The City requires FSEs to keep records of where the grease hauler disposes of the waste and that it is disposed of properly. EWA currently accepts hauled FOG waste for disposal at EWPCF’s digester to assist with methane production.

7.4 Authority to Prohibit FOG Discharges and Identify
Measures to Prevent FOG Spills and Blockages

CITY OF VISTA
Title 14, Chapter 14.12, Control and Regulation of Fats, Oils, and Grease, establishes the legal authority for the City’s FOG Control Program. FOG discharges that cause or contribute to a blockage are prohibited (Section 14.12.030).

FSEs are required to control their FOG discharge through the use of grease removal devices and BMPs. Section 14.12.090, Grease Control Device Design Requirements, establishes the requirements with Section 14.12.100 establishing grease maintenance 04/22/2025
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requirements. Compliance is enforced through Section 14.12.130 and 14.12.140, utilizing onsite inspections and sampling with Section 14.12.170 providing penalties for violations.

BUENA SANITATION DISTRICT
Chapter 12, Control and Regulation of Fats, Oils, and Grease, establishes the legal authority for the District’s FOG Control Program. FOG discharges that cause or contribute to a blockage are prohibited (Section 12.030). FSEs are required to control their FOG discharge through the use of grease removal devices and BMPs. Section 12.090, Grease Control Device Requirements, establishes the requirements with Section 12.100 establishing maintenance requirements. Compliance is enforced through Section 12.130 utilizing onsite inspections and sampling with Section 12.170 providing penalties for violations.

7.5 FOG Program Requirements and Design Standards

7.5.1 Requirements to Install Grease Removal Devices

CITY OF VISTA
Section 14.12.060, FOG Pretreatment Required of the City Municipal Code, specifically requires all new FSEs to install, operate, and maintain an approved type and adequately sized gravity grease interceptor necessary to maintain compliance with the objectives Chapter 14.12. Existing FSEs with no grease control device shall install, operate, and maintain an approved type and adequately sized gravity grease interceptor upon change of ownership or if a FSE undergoes remodeling or a change in operations as defined in Section 14.12.020.

BUENA SANITATION DISTRICT
Section 12.060 FOG Pretreatment Required of the Buena Sanitation District Code of Regulations specifically require all new FSEs to install, operate and maintain an approved type and adequately sized gravity grease interceptor necessary to maintain compliance with the objectives of Chapter 12.

7.5.2 Design Standards for Grease Removal Devices

CITY OF VISTA
Section 14.12.090, Grease Control Device Design Requirements of the City of Vista Municipal Code, specifically sets forth the design standards for grease interceptors installed within the City. All grease interceptors must be certified by the International Association of Plumbing and Mechanical Officers (IAPMO), or another listing agency approved by the director, and plumbed according to the California Plumbing Code.

BUENA SANITATION DISTRICT
Section 12.090 Grease Control Device Design Requirements of the Buena Sanitation District Code of Regulations specifically sets forth the design standards for grease interceptors installed within the District. All grease interceptors must be certified by the 04/22/2025
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IAPMO, or another listing agency approved by the director, and plumbed according to the California Plumbing Code.

7.5.3 Best Management Practices Requirements

CITY OF VISTA
Section 14.12.090, Grease Control Device Design Requirements of the City of Vista Municipal Code, also establishes kitchen BMPs that FSEs are required to implement.

BMPs include installation of drain screens on all drains, recycling of waste cooking oil, disposal of food waste in the trash and not in the sewer, and mandatory employee training. Employees are to be trained in FOG reduction practices such as dry wiping pots, pans and utensils, grease spill cleanup, disposal of food waste, and the proper disposal of cooking oils and grease. Employee training is to be documented and available for inspection. BMPs are to be conspicuously posted in the food preparation and dishwashing areas at all times.

BUENA SANITATION DISTRICT
Section 12.110, Best Management Practices of the Buena Sanitation District Code of Regulations, also establishes kitchen BMPs that FSEs are required to implement. BMPs include installation of drain screens on all drains, recycling of waste cooking oil, disposal of food waste in the trash and not in the sewer, and mandatory employee training.

Employees are to be trained in FOG reduction practices such as dry wiping pots, pans and utensils, grease spill cleanup, disposal of food waste, and the proper disposal of cooking oils and grease.

Employee training is to be documented and available for inspection. BMPs are to be conspicuously posted in the in the food preparation and dishwashing areas at all times.

7.5.4 Maintenance Requirements

CITY OF VISTA
Interceptors for FSEs shall be sized and designed in compliance with the California Plumbing Code and must be adequately maintained at the owners expense. Section

14.12.100, Gravity Grease Interceptor Maintenance Requirements of the City of Vista Municipal Code, states that any FSE required by the City Engineer or the ordinance codified shall adequately maintain the grease control deice at the user’s expense, so that the grease control device is in proper working order at all times.

Maintenance should include the complete removal of all contents, including floating materials, wastewater, sludge, and solids. Decanting or discharging of removed waste back into the grease control device from which the waste was removed or into any other grease control device, for the purpose or reducing the volume to be hauled is prohibited.

A maintenance log indicating each pumping of an interceptor for the previous 12 months and any other pertinent information shall be maintained by each establishment. This log shall include, but not be limited to, date, time, amount pumped, hauler, and disposal site, and the log shall be kept in a conspicuous location for inspection by the City Engineer or an authorized inspector during normal business hours.
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Interceptors for FSEs shall be sized and designed in compliance with the California Plumbing Code and must be adequately maintained at the owner’s expense. Section

12.100, Grease Control Device Maintenance Requirements, states that any FSE who is required by the District Engineer, or the ordinance codified in Chapter 12 of the Buena Sanitation District Code of Regulations to install or operate a grease control device shall be required to adequately maintain the grease control device at user’s expense, so that the grease control device is in proper working order at all times.

A maintenance log indicating each pumping of an interceptor for the previous 12 months and any other pertinent information shall be maintained by each establishment. This log shall include, but not be limited to, date, time, amount pumped, hauler, and disposal site, and the log shall be kept in a conspicuous location for inspection by the District Engineer or an authorized inspector during normal business hours.

7.5.5 Record Keeping and Reporting Requirements

CITY OF VISTA
Section 14.12.120, Monitoring, Reporting, and Record Keeping Requirements of the City of Vista’s Municipal Code, defines requirements for monitoring, reporting, and record keeping requirements of all FSEs. Additionally, all FSE inspections and activities are documented and tracked in CityWorks by City staff.

BUENA SANITATION DISTRICT
Section 14.12.120, Monitoring, Reporting, and Record Keeping Requirements of the Buena Sanitation District Code of Regulations, defines requirements for monitoring, reporting and record keeping requirements of all FSEs. Additionally, all FSE inspections and activities are documented and tracked in CityWorks by City staff.

7.6 Inspection and Enforcement Program

CITY OF VISTA
Title 14, Chapter 14, Section 14.12.130 of the City of Vista Municipal Code provides the City with the legal authority to inspect grease control devices, reviewing the manifests, receipts and invoices relating to the cleaning, maintenance, and inspection of the grease control devices. Title 14, Chapter 14, Section 14.12.140 provides that FSEs shall be open and available for inspection by an authorized inspector at all times during normal business hours to ensure that the operation and maintenance of the FSE complies with the requirements of this chapter. FSEs are required to maintain all appropriate records of their FOG-related activities including the maintenance of their grease control devices for a minimum of 5 years.
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To assist with FSE inspections and other FOG-related activities, the City contracts with an outside contractor to assist City staff. To aid in inspections, all FSEs have been added to the City’s GIS-based maintenance management system, CityWorks. Inspections are conducted in coordination with the City’s Stormwater NPDES inspections for FOG control.

Enforcement of the City’s FOG regulations is provided by Title 14, Chapter 14, Section

14.12.170, which includes administrative citations, misdemeanor complaint, or discontinuance of service.

BUENA SANITATION DISTRICT
Chapter 12, Section 12.130 of the Buena Sanitation District Code of Regulations provides the District with the legal authority to inspect grease control devices, reviewing the manifests, receipts and invoices relating to the cleaning, maintenance, and inspection of the grease control devices. Chapter 12, Section 12.140 requires FSEs to be open and available for inspection by an authorized inspector at all times during normal business hours to ensure that the operation and maintenance of the FSE complies with the requirements of this chapter. FSEs are required to maintain all appropriate records of their FOG-related activities including the maintenance of their grease control devices for a minimum of 5 years.

To assist with FSE inspections and other FOG-related activities, the City of Vista contracts with an outside contractor to assist City staff with FOG inspections within the District. To aid in inspections, all District FSEs have been added to the City’s maintenance management system, CityWorks. Enforcement of the City’s FOG regulations is provided by Chapter 12, Section 12.170, which includes administrative citations, misdemeanor complaint or discontinuance of service.

7.7 Maintenance Program to Address FOG Issues

CITY OF VISTA
Pipe segments prone to grease accumulation and blockages are included in the Wastewater Division’s EMA Program to reduce the likelihood of blockages. EMAs are cleaned every 3 months, or more frequently if required. The City maintains this program in CityWorks that tracks when maintenance is required. The reason the area or facility is part of the enhanced maintenance program (i.e., FOG, roots, etc.) is also noted. The EMA Program is planned for inclusion into CityWorks for tracking and generation of work orders.

BUENA SANITATION DISTRICT
Pipe segments prone to grease accumulation and blockages are included in the Wastewater Division’s EMA Program to reduce the likelihood of blockages. EMAs are cleaned every 3 months, or more frequently if required. The City maintains this program in CityWorks that tracks when maintenance is required. The reason the area is part of the EMA (i.e., FOG, roots, etc.) is also noted. The EMA Program is planned for inclusion into the CMMS for tracking and generation of work orders.
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7.8 Implementation of Source Control Measures to
Address FOG Issues

CITY OF VISTA
The City is aware of the location of all FSEs and FOG generators within the City service area. The relationship between FOG-related EMAs and FOG generators has been established. The City has the legal authority to conduct inspections of FSEs who are generating or are suspected of generating FOG. These inspections are conducted by City staff or an outside contractor and are done in conjunction with the City’s Stormwater Program. During the inspections, inspectors instruct FSE staff on the use of grease control devices and BMPs designed to reduce FOG generation. Inspectors will also review the FSEs FOG reduction practices including review of records, manifests or invoices for grease disposal, and maintenance on any installed grease removal devices.

All FSEs are required to implement BMPs designed to minimize the generation of FOG during the food preparation and cleanup process. FSE employees are required to receive documented training on the implementation of the BMPs from their employers. New or remodeled FSEs may be required to install and properly maintain an approved grease removal device.

In the event of a FOG-related spill occurring within an EMA (or anywhere within the sewer collection system) and the subsequent investigation shows evidence that a discharger caused or contributed to the spill, the City may request repayment of all associated costs, issue an administrative or misdemeanor complaint, or discontinue service.

BUENA SANITATION DISTRICT
The FOG Source Control Program developed by the City of Vista includes FSEs and FOG EMAs within the Buena Sanitation District, employing the same set of strategies and approaches within the District service areas as employed within the City service area.

References for Further Information

CITY OF VISTA
• City of Vista Municipal Code Title 14, Chapter 14.12:
https://portal.laserfiche.com/Portal/DocView.aspx?id=1044650&repo=r-3f0b2553 • City of Vista FOG Program Website:
https://www.vista.gov/departments/engineering/construction-projects/sewer/fats- oils-grease-fog
• City of Vista Design Standard and Procedures for Wastewater Facility Projects:

Located at the City of Vista

BUENA SANITATION DISTRICT
• Buena Sanitation District Sewer Code of Regulations:
https://portal.laserfiche.com/Portal/Browse.aspx?id=1343057&repo=r-3f0b2553 04/22/2025
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• City of Vista Design Standard and Procedures for Wastewater Facility Projects

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8 System Evaluation, Capacity Assurance,
and Capital Improvements
The following sections reference the City; however, since the City is also responsible for District assets, the sections apply to both.

8.1 System Evaluation and Condition Assessment

8.1.1 Best Practices and New Technology
The City currently uses WinCan for CCTV inspections and is planning to migrate all data to a cloud-based platform. As part of this transition, the City will leverage WinCan’s advanced features, including heat mapping and other visualization tools, integrating them directly into CCTV trucks for real-time field applications. In parallel, the City is expanding the use of CityWorks to optimize maintenance activities, streamline workflows, and optimize key performance indicators (KPIs) and dashboards that align with the objectives outlined in Chapter 9 of the SSMP. The CityWorks implementation and optimization is planned to be completed by the end of calendar year 2026.

To maximize the effectiveness of existing technologies, the City is refining work processes to eliminate technology challenges and establish best practices. These improvements will facilitate onboarding of new staff and enhance organizational resilience amid operational changes.

8.1.2 Evaluation of Sanitary Sewer System Assets
The City uses the following procedures to evaluate sanitary sewer pipelines and manholes.

Sewer Pipelines
The City uses CCTV inspection to evaluate sewer pipelines and stores all data in WinCan. Pipelines are coded in the NASSCO PACP system. The City has one in-house CCTV crew focused on investigative inspections and quality control inspections of sewer cleaning activities. Additionally, the City has one mobile CCTV unit that can be transported on various vehicles when needed.

Following recommendations from the 2017 Asset Management Plan, the City transitioned to a risk-based CCTV inspection schedule, prioritizing pipelines based on structural risk scores. This approach established initial inspection frequencies for pipelines across both the City and District. However, with the software used to generate structural risk scores set to sunset by the end of 2025, the City will shift to adjusting inspection frequencies based on observed defect severity. Additionally, the City plans to fully leverage existing tools within WinCan once all data has been migrated to the cloud, alongside the expanded use of CityWorks after optimization has been complete. The current inspection frequencies are as follows:
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• Pipelines greater than 15 inches in diameter that are not identified for remediation are grouped in a 5-year inspection frequency.
• Pipelines 15 inches or less in diameter that are not identified for remediation are grouped in a 5-year inspection frequency.
• Small-diameter pipelines with no defects are grouped in a 15-year inspection frequency.
• All other pipelines are grouped in a 10-year inspection frequency. • All new pipelines are grouped in a 15-year inspection frequency.

Sewer Manholes
City cleaning crews open and visually inspect the upstream and downstream manhole when a sewer pipe segment is cleaned. Manholes are scored on a 1 to 5 scale, with 1 being the best condition and 5 being the worst. When a significant structural defect is observed, the sewer cleaning crew will refer the manhole for repair. The manhole condition score is planned to be entered into CityWorks as part of its reimplementation, and will be used to support development of future agency-wide manhole focused rehabilitation contracts. In addition, Engineering will inspect all manholes included within a sewer pipeline rehabilitation and replacement project to determine if sewer manhole repair, rehabilitation or replacement needs to be included within the project scope.

Moving forward, the City plans to utilize CityWorks to develop key performance indicators (KPI) and dashboards to assist in establishing the amount of CCTV to perform per year based on the previously mentioned criteria. Currently, the City CCTVs approximately 40 miles of pipeline per year.

8.1.3 Condition Assessment Strategy
In the City’s and District’s system, the hydraulic modeling efforts from the 2025 SMP have identified high-risk areas that are prioritized. Based on the General Order, the City and District must incorporate additional factors into condition assessment prioritization. These include 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 • Are within the vicinity of a receiving water with a bacterial-related impairment on the most current Clean Water Act section 303(d) List
Through the development of structural risk scoring, the City has incorporated elements of these factors and have either addressed the highest-scoring projects or scheduled them to be completed in the future. The City is also leveraging GIS spatial queries to enhance inspections at all creek crossings, with plans to complete these assessments annually.

This initiative, along with broader considerations of the factors from the General Order, will be fully implemented by 2026.
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8.1.4 Inspection and Condition Assessment Methods
The primary driver of CCTV inspection prioritization includes past failure events, known maintenance issues, age, and material. The City will review the CCTV inspection data and will prioritize evaluation and planning activities on areas with pipe segments with past failure events, known maintenance issues, and significant structural issues.

Assessment of System Conditions
The 2017 Asset Management Plan established a decision logic framework to guide the monitoring, repair, and rehabilitation of deficient pipelines based on a structural risk score assessment. This assessment considers factors such as defect severity, defect count, cleaning frequency, pipe diameter, and proximity to Waters of the State to prioritize system improvements.

In 2021, the City further analyzed previously unavailable CCTV inspection data, refining the risk assessment process. The results generated a prioritized list of pipelines based on risk scores, which the City has since incorporated into its CIP.

Moving forward, the City will continue leveraging CCTV inspection data to identify defects and inform the strategic packaging and rehabilitation of pipelines, ensuring a proactive approach to system maintenance and asset management.

8.1.5 Inspection and Assessment Recordkeeping
CCTV inspection observations and videos are all maintained in WinCan. WinCan is a cloud-based CCTV software giving City staff access from any computer in the City.

WinCan is also GIS-based, enabling results to be easily linked with the City’s GIS-based computerized maintenance management system (i.e., CityWorks). Results from CCTV are easily accessed and viewed by staff.

8.1.6 Assessing Assets Vulnerable to Climate Change
The City’s Climate Action Plan (CAP) provides a comprehensive roadmap to reduce greenhouse gas (GHG) emissions and address the challenges of climate change in the city. The City first adopted a CAP in 2012 and was updated most recently in 2021.

The City performed a high-level review of assets vulnerable to climate change as part of the 2025 SSMP update. The high-level review resulted in the following findings:
• Sea level rise: The City and District are located inland several hundred feet above sea level and is not impacted by sea level rise.
• Flooding: The City is not aware of any areas of their system prone to flooding.

Recent improvements of the City’s storm drain system have been completed through funding from the American Recovery and Reinvestment Act. • Erosion Due to Intense Rain Events: Most of the City's pipeline crossings are perpendicular to streams, minimizing the pipe length exposed to erosive forces. • Wildfires: The City completes easement clearings of the gravity sewer system the mediate potential wildfire risks.
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• Power Disruption: EWA manages all pump stations and has emergency procedures in place with backup power generation when needed.

8.2 Capacity Assessment and Design Criteria
In 2025, the City completed an update to their SMP, which included the development of a computerized hydraulic model for the City’s wastewater system. This model was used to perform hydraulic analyses to assess the performance of the existing wastewater system under dry and wet weather conditions, evaluate the impact of future growth, and recommend improvements that may be needed to provide the needed capacity under both existing and future conditions. The goal of the hydraulic model development and system evaluation was to:
• Determine additional infrastructure requirements for resolving current model- predicted hydraulic capacity limitations
• Evaluate the system under both dry weather and wet weather flows for the current conditions and future planning horizons
• Identify infrastructure needed to resolve limitations

8.2.1 Procedures for Identifying and Addressing Hydraulic Deficiencies and Capacity Limits
Dry-Weather Peak Flow Conditions that Cause or Contribute to Spill Events Extensive flow monitoring was performed in conjunction with the SMP’s development.

The City deployed 20 temporary flow meters in key areas and used permanent ADS flow meters flow histories to develop and updated hydraulic model. This data was used to update wastewater flow factors for different land uses and determine the average dry weather flows (ADWF). Peak dry weather flows (PDWF) were calculated from the ADWF.

Appropriate Design Storm or Wet Weather Event Criteria
The City’s SMP, currently in development and scheduled to be finalizing in the summer of 2025, will establish the appropriate design storm and wet weather event criteria for the collection system. This plan will include an analysis of recent storm events to determine peak wet weather flows and define the design parameters necessary for system capacity planning.

Capacity of Key System Components
Through hydraulic condition assessment, population forecast, and modeling, the City identifies current capacity needs, predicts future capacity requirements, and develops capital improvement projects to address identified capacity deficiencies.

Capacity restoration may be provided by constructing larger replacement pipes or by reducing extraneous defect flows by pipeline rehabilitation. By estimating the rehabilitation costs associated with I&I reduction and the effects on pipeline capacity, the 04/22/2025
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SMP identified a recommended set of CIP projects necessary to address identified capacity restrictions and condition-related problems.

Major Sources Contributing to Peak Flows Associated with Sewer Spills As part of the 2025 SMP, the City identified major confluence points and trunk systems where peak flows were significantly higher. Additionally, flow meter data revealed unexpected areas of high flow, which were subsequently incorporated into the City's rehabilitation program to mitigate potential sewer spills.

8.2.2 Capacity Assessment Considerations
Data from Existing Condition Assessments, Maintenance, and Other Available Information
During capacity assessments, the City reviews data from sewer pipeline condition assessments, system inspections, spill history, and other available information to support a comprehensive understanding of system performance. This information is used to inform overall capacity evaluations and guide any necessary adjustments or improvements to the collection system.

Capacity of Systems Subject to Flooding and Increased Infiltration and Inflow Due to Larger and/or Higher-Intensity Storm Events As a Result of Climate Change
The City performed flow monitoring in 2024 and measured site-specific flows, including areas impacted by flooding or I&I, to establish new peak flows within the sewer system.

The City used these new peak flows to update and calibrate the City’s hydraulic model, which was then used to perform system capacity analysis to identify potential capacity deficiencies and areas of high I/I that the City plans to address that is documented in the 2025 SMP. The draft plan is under review and scheduled to be finalized by early summer 2025.

Sewer System Vulnerability to Erosive Forces in Canyon and Streams Most of the City’s pipelines in canyon and stream areas are positioned perpendicularly to the water flow. Moving forward, the City plans to develop a preventative maintenance program for pipelines at creek crossings, with a primary focus on ductile iron pipes.

Currently, these pipelines are addressed only when capacity issues arise. The City is in the process of developing cyclical preventive maintenance inspection work orders to ensure system integrity and continuous safe operation at these locations.

Necessary Redundancy in Pumping and Storage Capacities
EWA oversees operation and maintenance of the four pump stations in the City and District’s system. The pump stations are equipped with either standby backup pumps and/or site contained emergency overflow storage to mitigate the risk of environmental discharge in the event of a system failure. A full backup redundant system exists at the Agua Hedionda Lift Station since it conveys majority of the City’s flows to the EWPCF. 04/22/2025
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8.3 Prioritization of Corrective Actions
Corrective actions are prioritized based on the following classes:
• Capacity Projects: These are capacity-related improvement projects identified in the Wastewater Master Plan. The City derived these projects using the hydraulic model to evaluate the response of the wastewater system under existing and future peak wet weather conditions.
• Pipeline Replacement and Renewal Projects: These rehabilitation projects and programs are identified by Engineering to remediate pipelines with known condition deficiencies to establish a condition assessment and pipeline renewal program to promote long-term system reliability.

8.3.1 Sewer Condition Remediation Prioritization
Pipelines
The 2017 Asset Management Plan provided a 5-year roadmap for the rehabilitation and replacement of sewer pipelines. The City has been addressing these pipelines based on priority and is currently reviewing and reprioritizing the list to guide future projects.

In 2020, the City completed a package of prioritized pipeline rehabilitations and opened bids in March 2025 for another set of projects to be addressed in the calendar year.

Moving forward, the City will continue to rehabilitate and replace pipelines, prioritizing projects based on defects identified through CCTV inspections to ensure a proactive and data-driven approach to asset management.

The City also utilizes as-needed emergency contractors for urgent situations. In the event of a sewer spill, the City can deploy an emergency team within days to perform Cured-In- Place Pipe (CIPP) rehabilitation or excavated point repairs beyond the ability of the in- house crews. Numerous repairs have been conducted through this process in parallel with system failures that caused reported sanitary sewer overflows reported to CIWQS.

For spot lining repairs, the City has a quarterly meeting between Engineering the Operations and Maintenance to review repair needs, generate work orders, and route them efficiently. The process includes identifying issues that could first be addressed by the Service and Repair Team and, if beyond their capabilities, escalated Engineering for further action.

Manholes
The City rehabilitated 43 manholes along the Buena Outfall pipeline in 2024. As the City enhances its manhole inspection program, additional manholes will be rehabilitated or replaced based on field condition assessments and coordinated with other pipeline projects to ensure efficient infrastructure improvements.

8.4 Capital Improvement Plan
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The CIP is a 6-year planning tool, developed and updated biennially, to add new appropriations and/or projects and evaluate priorities, while taking into account new requirements and new sources of funding. Biennial budgeting refers to the practice of developing a budget every 2 years. Two-year budgeting allows the City to use its human resources more efficiently and also reinforces the City’s commitment to long-term fiscal health by looking beyond a 1-year period when funding operating activities and capital improvements. Under 2-year budgeting, the City will continue to operate on a July to June annual fiscal year, retaining the fiscal control currently provided by annual budgets. The public and City Council will continue to receive quarterly financial updates as well as a mid-cycle review approximately 12 months after the initial adoption of the 2-year budget.

The City’s CIP budget is available on the City of Vista website:
https://www.vista.gov/departments/finance/city-budget.

Project schedules are established and prioritized based on current and future capacity needs, condition assessment, and potential risks of spill. Project budgets and schedules are routinely reviewed and adjusted biannually by the Director of Engineer, Sewer Engineering Manager, and Project Engineers/Project Managers.

The CIP list is available for review on the City of Vista website:
https://www.vista.gov/business/bids-rfp-s.

8.4.1 Funding
To support the management, operation, and maintenance of the collection system, the City has established multiple funding sources. The City and District each have separate O&M funds of $1.5 million per year, staggered to ensure continuous financial support.

Capital improvements are funded through the City Capital Fund and District Capital Fund, which include both the Replacement Fund and the Capacity Fund. The Replacement Fund is sustained through annual billing revenue, while the Capacity Fund is financed by fees collected from new connections.

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9 Monitoring, Measurement, and Program
Modifications
The following sections reference the City; however, since the City is also responsible for District assets, the sections apply to both.

9.1 Maintenance Information to Prioritize SSMP Activities As the City of Vista and Buena Sanitation District collection systems are managed, operated, and maintained as a single collection system, the monitoring, measurement, and program modification efforts of the City extend to the District. The same processes and procedures utilized by the City to measure the effectiveness of their SSMP are used to measure the effectiveness of the District’s SSMP.

The City uses the following databases to capture and maintain the relevant information used to establish and prioritize appropriate SSMP activities:
• GIS
• Computerized maintenance management system CityWorks
• Reports and studies

9.2 Monitoring Implementation and Effectiveness of the
SSMP
The City monitors sewer spill performance to accomplish the following:
• Establish and prioritize appropriate SSMP activities
• Monitor the implementation and effectiveness of the SSMP • Assess the success of the preventive maintenance program • Identify and illustrate sewer spill trends including frequency, volume, and location The City’s CMMS and sewer spill database contains information used to determine the effectiveness and success of the preventive maintenance activities and allows for historical review of work order history to adjust maintenance and repair priorities. The City performs a failure cause analysis of individual sewer spill events and, based on this review, identifies corrective actions to prevent future sewer spill events.

9.2.1 Performance Monitoring and Program Changes
The City evaluates the performance of its wastewater collection system using the performance measures identified in Table 9-1 and updates SSMP programs, process, and systems as needed. Sewer spill metrics are used to evaluate performance. The City is in the process of a CityWorks update and reimplementation that will be used for tracking many performance metrics and continuously evaluates additional performance 04/22/2025
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metrics maintained by the City. The City plans for this to be completed by the end of calendar year 2026.

Table 9-1. Monitoring Summary Table
Program Activities
Type Performance Measure Source
System Statistics
Total miles of gravity sewer GIS
Total miles of pressure sewer GIS
Total number of manholes GIS
Inspection Activities
Miles of system CCTV'd per year CityWorks
Miles of system Cleaned per year CityWorks
Number of FOG control inspections per year CityWorks
Sewer Spill Data
Type Performance Measure Source
Measures Based on Sewer
Spill Number
Number of Sewer Spills by cause CIWQS and CityWorks
Number of Sewer Spills per 100 miles of sewer per
year CIWQS and CityWorks
Map of Sewer Spills locations per year CIWQS
Measures Based on Sewer
Spill Volume
Total volume of Sewer Spills per year CIWQS and CityWorks Total Sewer Spill volume recovered and percentage of
overall total Sewer Spill volume CIWQS and CityWorks
Total volume of Sewer Spills released (total minus
recovered) CIWQS and CityWorks

9.3 Assessment of Preventive Maintenance Program
The City has a number of tools available to monitor and measure the progress of its SSMP. Most data is housed and tracked in GIS-integrated databases that can be analyzed as needed for ongoing system management. The manager of each component of the SSMP is responsible to identify relevant information to establish and prioritize SSMP activities. Data from the systemwide CCTV inspection is integrated into the GIS system and will be used for comparison with future CCTV inspection data.

CityWorks is used by the Public Works Wastewater Division to manage and document all work orders for cleaning, maintenance, and inspection. A separate EMA Program is in place for more frequent maintenance of sewers prone to blockage due to FOG or root intrusion.

9.4 Identification and Illustration of Spill Trends
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The City reports all public and private property spills. Spill reports are maintained at the City and on the California Integrated Water Quality System’s (CIQWS) Sanitary Sewer System Database. Spill reports are analyzed by management to determine strategies to prevent future occurrences. Spill response efforts are also analyzed by management to determine their efficiency and effectiveness. Spill data along with on-site inspection data is utilized to monitor the progress of the City’s FOG Reduction Program.

9.5 Approach to Program Modifications and Plan Updates
Program elements are updated as appropriate based on monitoring or performance evaluations. The main drivers of updates to SSMP program elements are program issues or opportunities identified through the following performance evaluation processes:
• Program issues identified as a result of post sewer spill analysis • Program issues or opportunities identified through the course of the year • Program issues or opportunities identified during the SSMP program audit Additionally, the City routinely conducts an update to its SSMP. The SSMP Update reviews multiple aspects of the City’s management, operation, maintenance, funding, and CIP progress for the collection system. This document was last updated in 2025.

References for Further Information
• Wastewater Operations Division – Spill Reports
• Wastewater Operations Division – CityWorks CMMS
• City of Vista – Sewer Engineering Division Sewer GIS

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10 SSMP Program Audits
The City uses the SSMP audit process to identify actions for improving how it manages, operates, and maintains the collection system. This process focuses on evaluating the effectiveness of the SSMP and the City’s compliance with the SSMP requirements, including identification of any deficiencies in the SSMP and steps to correct them. As both the City and the District’s collection systems are operated as a single system, audits for the District will be conducted in conjunction with the City’s SSMP audits. Completed audits will be maintained at the City. The following sections apply to both the City and District.

10.1 Schedule of Program Audits and Updates
The City audits the SSMP and program implementation on a 3-year cycle. Audits focus on a review the City’s SSMP activities from the time of the last audit and summarize the data accumulated through its monitoring, measuring, and program modification efforts.

Particular attention is paid to each program’s effectiveness in meeting its goals, objectives, and priorities while ultimately being tied into the budgetary process.

Completed audits are retained on file by the City. Every 6 years, the City formally updates and recertifies the SSMP. Table 10-1 shows the anticipated schedule for SSMP audits and updates for the next 6 years.

Table 10-1. SSMP Audit and Update Schedule
Year Audit
2024 Three-year audit planned in mid-2024, complete by November 2, 2024 2025 Six-year SSMP update planned in early 2025, complete by May 2, 2025 2027 Three-year self-audit planned in early 2027, complete by November 2, 2027 2030 Three-year self-audit planned in early 2030, complete by November 2, 2030 2031 Six-year SSMP update planned in early 2031, complete by May 2, 2031

10.2 SSMP Audit Process
The audit process includes the review of additions or improvements made to the collection system during the current audit period and describes planned additions and improvements for the upcoming audit period. Supporting documents are reviewed to ensure that they are up-to-date and the most recent documents are available and referenced.

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Training includes on-the-job requirements, safety, required licenses and/or certificates, and professional development.

10.3 SSMP Audit Report
The findings from the SSMP audit are documented in an audit report. The audit report includes the following elements:
• Audit findings and recommended corrective actions
• A statement that the sewer system operators’ input on the audit findings has been considered
• A proposed schedule to address identified deficiencies Once the audit report is complete, a QC review of the audit report is performed, with a focus on consistency and completeness. The final audit report is reviewed by the City’s LRO before final acceptance. Audit reports and related materials are maintained in a hard copy and an electronic document tracking and management system.

Complete audits will be retained on file by the City.

10.4 Audit Implementation and Tracking of Results
The SSMP program audit recommended corrective actions are incorporated into the operating and capital budgeting process to provide the necessary resources to implement audit corrective actions and recommendations. Each subsequent audit update begins with a review of the previous audit to determine if the corrective action remains relevant and, if so, to reiterate the program deficiency and recommended corrective action in the current SSMP audit report.

References for Further Information
• SSMP Program Audit Report, 2023

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11 Communication Program
The City employs a variety of means for communicating with the public and contract agencies on the development, implementation, and update of the SSMP. The following sections describe the City’s procedures for:
• Communicating with the public for spills and discharges resulting in closures of public areas, or that enter a source of drinking water
• Communicating with the public on the development, implementation, and update of its SSMP, including opportunities for public input to Plan implementation and updates
• Owners/operators of systems the City has flow transfer agreements with, such as Carlsbad, Oceanside, the Vallecitos Water District, and the City of San Marcos, as well as with the Buena Sanitation District

11.1 Procedures to Communicate with Public for Spills and Discharges

CITY OF VISTA
The City’s procedures for spill emergency response are included in Attachment F1. If a spill affects a waterway or ocean requiring posting of signage, contact the County of San Diego’s Department of Food and Housing. The County will inform personnel where and when to post and remove signage for waterways and beach closures as required and will not remove the signs until the effects of the spill have been mitigated.

Major spills may warrant broader public notice. The Collection Systems Operations Manager and/or Collection System Operations Supervisor will contact the City of Vista’s Communications Officer. They will create and execute the outreach plan for media. If media crews show up at a job site, the crews will ask media personnel to wait and will contact the Communications Officer immediately. The approval of the Communications Officer is required prior to contacting local media when significant areas may have been contaminated by sewage.

BUENA SANITATION DISTRICT
As the overseeing entity, the City manages the District’s collection system; therefore, all information outlined above applies equally to the District.

11.2 Procedures to Provide Opportunities for Public Input on SSMP Development, Implementation, and Update

CITY OF VISTA
The Vista City Council encourages public participation in City activities. Time is allotted at each open City Council meeting for public comment, and the City maintains a website where information about the collection system and SSMP is publicly available. The City 04/22/2025
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also posts collection system documents, such as this SSMP, for public review. The City’s Municipal and Development codes, which provide the legal authority to manage, operate, and maintain the sanitary collection system, are also online, as is the Sanitation CIP Schedule.

The City utilizes email alerts, newsletters, specialized publications, and participation in community events and local community groups to disseminate information and solicit feedback on its programs. Outside public relations consultants are used, as with the initiation of the FOG Reduction Program, to develop folders, door hangers, logos, catchy phrases, and so on to inform the public of new or ongoing programs. These activities are coordinated through the City’s Communications Officer.

BUENA SANITATION DISTRICT
The Buena Sanitation District’s Board meetings are held at the same time as the Vista City Council Meetings, with the Board comprising members of the Vista City Council.

Public input is encouraged at these meetings.

11.3 Procedures to Communicate with Collection Systems
Connecting to City System

CITY OF VISTA
The City of Vista has flow transfer agreements with Carlsbad, Oceanside, the Vallecitos Water District, and the City of San Marcos, as well as with the Buena Sanitation District.

Coordination meetings will be held at least annually with each of these communities for the specific purpose of managing these agreements. In addition, there are monthly meetings with the Encina Member Agency Managers, at which the agreements are discussed.

BUENA SANITATION DISTRICT
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Attachment A1. Actions Certifying SSMP

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Attachment A2. State Water Resources Control
Board General Order for Sanitary Sewer Systems

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Attachment B. Organization Names and Contact
Information

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Organization Names and Contact Information
Position Name Phone Number
City Manager (District General Manager) John Conley 760.643.5200 City Attorney (District Counsel) Walter C. Chung 760.639.6119 City Engineer (District Engineer) Greg Mayer 760.639.6111 Sewer Engineering Division Manager –
Legally Responsible Official (LRO) Kenneth Knatz 760.639.6111 Public Works Operations Manager Cirilo Mariscal 760.639.6177 Public Works Wastewater Supervisor Mario Serrato 760.643.5471 Building Official Nabil Chehade 760.639.6105
Code Enforcement Manager Clarence Rich 760.639.6141
Communication Officer Fred Tracy 760.643.5217
Director of Community Development Patsy Chow 760.639.6100 Director of Finance Michael Sylvia 760.643.5366
Public Works Director Chris Arce 760.639.6177
Stormwater Program Manager Juan Magdarog 760.643.5425
Management Assistant Moises Verdin 760.643.5470

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Attachment F1. Spill Emergency Response Plan

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CITY OF VISTA & BUENA SANITATION

DISTRICT

Spill Emergency Response Plan
(SERP)

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1 Introduction
The purpose of the Spill Emergency Response Plan (SERP) is to support an orderly and effective detection and response to spills to reduce spill volumes and collect information for prevention of future spills. This plan provides guidelines for personnel to follow in responding to, cleaning up, and reporting spills that may occur within the City of Vista and Buena Sanitation District (City) service areas. The City owns and operates the Buena Sanitation District which includes incorporated areas of San Diego County and parts of San Marcos.

This Spill Emergency Response Plan (SERP) details only pipeline incidents. Encina Wastewater Authority (EWA) operates and maintains the sewer pump stations on behalf of the City. EWA maintains a separate SERP for each of the sewer pump station which include Raceway, Buena Vista, and Agua Hedionda Pump Stations (City of Vista), and Buena Creek Pump Station (Buena Sanitation District)

1.1 Regulatory Requirements
This section summarizes the regulatory requirements for SERP.

WDR Requirements
The General Waste Discharge Requirements (WDR) was adopted by the State Water Resources Control Board requires agencies to develop and implement an overflow emergency response plan that identifies measures to protect public health and the environment. In addition, Region 9 Water Resources Control Board includes requirements for the San Diego Region. At a minimum, this plan must include the following:
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

1.2 Goals
The City’s goals with respect to responding to spills are:
• Work safely;
• Minimize public contact with the spilled wastewater;
• Respond quickly to minimize the volume of the spill;
• Eliminate the cause of the spill;
• Contain the spilled wastewater to the extent feasible; • Prevent sewage system overflows or leaks from entering the storm drain system or receiving waters to the maximum extent practicable;
• Mitigate the impact of the spill; and
• Meet the regulatory reporting requirements.

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2 Spill Detection
The City has adopted a procedure requiring immediate response to minimize or eliminate an overflow. The processes that are employed to notify the City of the occurrence of an spill include: observation by the public, receipt of an alarm, or observation by the City staff during the normal course of their work.

2.1 Public Observation
Public observation is the most common way that the City is notified of blockages and spills. Contact information for reporting sewer spills is located on the City’s website at www.cityofvista.com. The main phone number for the Public Works Department is (760) 643-5454. Additional phone number includes (760) 639-6177.

2.2 Normal Work Hours
The normal working hours for City office staff, including Customer Service staff responsible for answering emergency calls, is from 6:30 a.m. to 4:00 p.m. Monday through Thursday. The office is open every other Friday from 6:30 a.m. to 3:00 p.m. The normal working hours for City’s Wastewater Operation and Maintenance (WOM) crews are Monday through Thursday from 6:30 a.m. to 4:00 p.m. and every other Friday from 6:30 a.m. to 3:00 p.m., except holidays. When a report of a sewer spill or backup is made, the Customer Service representative receives the call, takes the information from the caller and communicates this information to a Wastewater lead worker and/or the Wastewater Public Works Supervisor (herein “Supervisor”) who will dispatch a field crew to the site. The Customer Service representatives are instructed not to leave a voice mail and must communication verbally with a Supervisor or a Wastewater lead worker.

2.3 After-Hours
After-hours emergency calls go to the after-hours answering service, Answer California.

The after-hours answering service staff are trained to gather basic information regarding a customer complaint and relay this information to the Primary and Secondary Standby Responders who simultaneously receive a text and/or phone call. The Primary Responder is trained to investigate the emergency and is responsible for addressing the issue and contacting the secondary standby responder or other personnel, if required.

The Office Specialist in the Public Works Department is responsible for maintaining the Standby List for the Public Works Department which contains the names, phone numbers, and responsibilities for standby employees and distributing distributes an updated list weekly via e-mail.

The City’s after hours approach to sewer overflow response is to include employees with different skill sets on the Standby List enabling the City to respond quickly and effectively to a variety of emergencies The Standby List includes the following designations for standby employees:

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Table 2-1. Standby List Positions and Roles
Position Roles
Wastewater Primary Standby Responder Through a process of investigating and/or experience of the primary responder, either addresses the service
call or calls for secondary support from standby
personnel as needed.

Wastewater Secondary Standby Responder Provide backup support to primary responder as requested.

Wastewater Public Works Supervisor /
Operations Manager
Supervises and manages all spill incidents.

Responds onsite if needed.

Sewer Engineering Division Manager Provides engineering and technical support if needed.

Stormwater Quality Control Manager Responds to service call involving quality issues.

2.4 Record Keeping
All emergency call information is stored in the CityWorks database and is entered by the Wastewater Primary Responder and/or the Wastewater Public Works Supervisor.

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3 Spill Response Procedures

3.1 Dispatch
Sewer service calls are high priority events that demand a prompt response to the location of the problem. Upon notification of a potential sewer overflow, a City Responder shall be dispatched onsite within 45 minutes during normal working hours and during standby. During normal working hours, the first responder called will be the Wastewater maintenance crew chief and/or the crew designated to the Sub Area located within the City of Vista or Buena Sanitation District, if available. During after hours, the Primary Standby Responder will be contacted and will investigate the service call to determine the appropriate response. The response procedures for spills are shown in Figure 3-1.

3.2 Primary Responder Priorities
The Primary Responder’s priorities, as the first person to respond to the call, are:
• To follow safe work practices;
• To respond promptly with appropriate equipment;
• To restore the flow as soon as practicable;
• To contain the spill wherever feasible;
• To minimize public access to and/or contact with the spilled sewage; • To return the spilled sewage to the wastewater collection system; and • To restore the area to its original condition (or as close as possible).

3.3 Safety
The Primary Responder is responsible for following safety procedures at all times.

Special consideration should be given for confined space, traffic, and other safety procedures.

Traffic Control
Traffic control requirements vary by location which will dictate the type of control and the speed risk to necessary to protect personnel and the public in accordance with the California Manual on Uniform Traffic Control Devices (Cal-MUTCD). Caltrans standards are the minimum for congested and/or high- speed streets and highways. The minimum traffic controls for low-speed/low-traffic-density streets should conform to the Federal Highway Administration (MUTCD), the California Department of Transportation MUTCD.

In the case where there are no local standards, the minimum traffic control should be:
• Warning signs (signs with the symbol for person working are preferred); • Directional arrow signs on rear of the truck;
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• One or more flaggers utilized to control and direct traffic where visibility is limited or the possibility of collision exists.

3.4 Initial Response
Clarify that the Primary Responder during standby will perform initial assessment either through phone call interview or initial site assessment.

The Primary Responder is responsible for contacting the reporting party to clarify the situation and collect any additional information that may allow City personnel to respond in an efficient manner. The Primary Responder will notify the Secondary Responder and respond to the site. When the Primary Responder comes to the site, they first will:
• Field verify the address and nearest cross street to determine whether the spill or backup is located in the service area. If spill/backup, Primary Responder will notify the Secondary Responder to arrive to the site.
o If the location of the spill is not in the service area or not caused by the City’s sewer system, call the responsible agency, provide them with the service call information, and notify the caller that the responsible agency has been notified. The City’s Emergency Directory contains contact information for surrounding agencies.
o If the spill/backup is caused by another agency’s sewer system, the responding crew will standby until representatives of the responsible party arrive and are fully operational unless an emergency within the City’s sewers requires the team to respond to another location.
• Notify the Public Works Wastewater Supervisor when a spill is verified. The Supervisor will work with crew to determine if additional resources are needed and level of response.
• If the spill/backup reaches a drainage conveyance, Public Works Wastewater Supervisor will notify Stormwater quality personal.
• Respond with the appropriate spill response equipment that has spill containment tools, materials and any additional equipment that may be needed based on the details provided by the caller.
o Note arrival time at spill site.
• If the spill/backup is caused by a private lateral, the responding crew should contain/mitigate the spilled sewage to prevent sewage from entering the public ROW without City staff going on private property.
• Check upstream and downstream manholes to identify location of issue • Set up traffic and pedestrian control as necessary for safety of the public and the response crew.
• Identify and assess the affected area and extent of spill using photography, global positioning system (GPS), and other best available tools. Document the critical spill locations, including:
o Photography and GPS coordinates for:
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▪ The system location where spill originated. For multiple appearance points of a single spill event, the points closest to the spill origin. o Photography for:
▪ Drainage conveyance system entry locations,
▪ The location(s) of discharge into surface waters, as applicable ▪ Extent of spill spread, and
▪ The locations(s) of clean up
▪ If the spill appears to be too large for the response crew to handle or is in an area that may cause danger to human health (e.g. impacting a school, hospital, park, etc.), then document conditions upon arrival with photographs.
• Use best judgment to determine whether to proceed immediately with blockage removal versus containment. The guidance for this decision is:
o Small spills – proceed with immediate containment measures near the appearance point followed by blockage removal.
o Moderate or large spill where containment is anticipated to be simple – proceed with immediate containment measures near the appearance point followed by blockage removal.
o Moderate or large spills where containment is anticipated to be difficult – proceed with clearing the blockage; however, call for additional assistance immediately to focus on implementing containment measures.

3.5 Restore Flow
Using the appropriate cleaning tools, set up downstream of the blockage and hydro clean upstream from a clear manhole. Attempt to remove the blockage from the system and observe the flows to ensure that the blockage does not recur downstream. • If the blockage cannot be cleared within a reasonable time (15 minutes), or the sewer requires construction repairs to restore flow, then initiate additional containment measures and/or bypass pumping.
• If assistance is required, contact other employees, contractors, and equipment suppliers.

3.6 Initiate Spill Containment Measures
The responding crew should attempt to contain as much of the spilled sewage as possible using the following steps:

Determine the immediate destination of the overflowing sewage and impacts to the stormwater system.
• Implement immediate containment measures consisting of plugging storm drains using sandbags, sewer plugs, plastic sheeting, and/or other dam construction material to contain the spill, whenever appropriate.
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• Additional containment measures include containing/directing the spilled sewage using dike/dam, sandbags, or earthen berms in landscaped or undeveloped areas.
• Bypass Pump around the blockage/pipe failure to convey the wastewater to the nearest downstream manhole or facility.
• If the spill is caused by a private sewer lateral, City staff may call building inspection staff to red- tag or declare property uninhabitable when the wastewater endangers the public health.

3.7 Water Quality Sampling and Testing
For sewage spills in which an estimated 50,000 gallons or greater are discharged into a surface water, the City will conduct the following water quality sampling no later than 18 hours after knowledge of a potential discharge to a surface water:

Stormwater quality personnel will be contacted during normal hours, or the County of San Diego Department of Environmental Health team personnel will be contacted after- hours for contamination to any water body.

The City of Vista Supervisor, Wastewater staff, or First Responder will collect one water sample, each day of the duration of the spill to be analyzed by lab to determine contamination, at:
• The DCS-001 location as described in Table 3-1 if sewage discharges to a surface water via a drainage conveyance system; and/or
• Each of the three receiving water sampling locations in Table 3-2.

If the receiving water has no flow during the duration of the spill, the City will report “No Sampling Due To No Flow” for its receiving water sampling locations.

The City will contact the Regional Water Board Executive Officer or designee to determine additional samples to collect and analyze. (619) 516-1990.

Table 3-1. Sampling of Flow in Drainage Conveyance System (DCS) Prior to Discharge Sample Location Sampling Location Description
DCS-001 A point in a draining conveyance system before the drainage conveyance system flow discharges into a receiving water.

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Table 3-2. Receiving Surface Water Sampling (RSW)
Sample Location Sampling Location Description
RSW-001 Point of
Discharge
A point in the receiving water where sewage initially enters the receiving water.

RSW-001U: Upstream
of Point of Discharge
A point in the receiving water, upstream of the point of sewage discharge, to capture ambient conditions absent of sewage discharge impacts.

RWS-001D:

Downstream of Point
of Discharge
A point in the receiving water, downstream of the point of sewage discharge, where the spill material is fully mixed with the receiving water.

The water samples shall be taken to Encina Wastewater Authority (EWA) to analyze the samples to determine the nature and impact of the discharge. EWA is an Environmental Laboratory Accreditation Program (ELAP) accredited laboratory as documented in Attachment F4. The basic analyses will include:
• Total Coliform
• Fecal Coliform
• Enterococcus
• Nitrates and
• Ammonia Hatch.
• Testing for dissolved oxygen and/or biochemical oxygen demand (BOD) could be added for testing if deemed necessary.

If the City encounters access restrictions or unsafe conditions that prevents the ability to sample, the City shall provide documentation of access restrictions and/or safety hazards in the required report submitted to CIWQS.

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Figure 3-1. Spill Response Flow Chart
Spill calls to City of Vista and Buena
Sanitation District
Routed to City of Vista Customer
Service Main Line (760 -643-5454)
Call from Public to City of Vista Main Phone
Number (760 -643-5454)
During Normal Working Hours Calls answered by City of Vista Customer Service
During After -Hours, calls routed to Answer California Answering Service
Operator requests the following information:

Reporting party s name and phone number
Address of Spill (intersection, approx. location)
Manhole, clean -out, or other
Estimated volume or magnitude
Traffic impacted
Damage
Normal Working Hours
• Customer Service notifies Collection
System Crew Chief and Collection
System Supervisor
• Dispatch Collection System Crew
Chief
After-Hours
• Answering Service notifies Primary Responder who
proceeds to site
• Investigate location of complaint
• If sewer-related, requests support from Secondary
Responder
Respond
Primary Responder notifies Secondary Responder
Primary Responder responds to Spill site, notes arrival time If spill, Primary Responder notifies the Secondary Responder to arrive
Investigate

1. Investigate Spill Site, take photo, begin checking upstream and downstream manholes to identify location of issue

2. Work with Managers on mitigation (Contain Spill and prevent Spill from reaching storm drain or water body)

3. Set up Hydro -Jetter at the downstream manhole for blockage removal (30 mins).

Set up bypass if blockage not cleared

4. Determine Ownership of Sewer

5. Categorize Spill Event (Cat 1, Cat 2, Cat 3, Cat 4, Private Lateral SD) City of Vista or BSD Sewer System Spill
or Private Lateral Sewage Discharge
(PLSD)
Other Agency Sewer
System Spill or PLSD. Work with
Wastewater Supervisor, Public Works
Operation Manager, or Sewer Engineering
Division Manager to contact neighboring
agencies and determine next steps.

Spill
Detected
First Responder or
Spill Response Crew
Customer Service, Wastewater
Supervisor or Public Works
Operation Supervisor
Encina Water Authority
Mike Sumner: 760-801-9104
Octavio Navarrete: 760-801-9110
Carlsbad
Jesse Castenada: 760-802-8200
Collections Duty Operator: 760-802-4634
Vallecitos Water District
Justin Woodard: 760-855-3629
Ed Pedrazzi: 760-420-5752
Oceanside
Jeremy Kemp: 760-535-0040
Mike Dumas: 760-497-0137
Neighboring Agency Contact List

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4 Recovery and Clean Up
The recovery and clean up phase begins when the flow has been restored and the spilled sewage has been contained to the extent possible. The spill recovery and clean up procedures include the steps below.

4.1 Estimate the Volume of Spilled Sewage
Use the methods outlined in the Spill Emergency Response Plan, or other methods as deemed necessary, to estimate the volume of the spilled sewage. If possible, utilize available information such as pump station run times and Supervisory Control and Data Acquisition (SCADA) data to support or validate volume estimates. Wherever possible, document the estimate using photos of the spill site before and during the recovery operation.

4.2 Recovery of Spilled Sewage
Vacuum up spilled sewage using the hydro/combo unit or pump the spilled sewage and any water used to flush the area and discharge it back into the wastewater collection system or pumped back to system.

4.3 Clean Up and Disinfection
Implement clean up and disinfection procedures to reduce the potential for human health issues and adverse environmental impacts that are associated with a spill event. The procedures described are for dry weather conditions and should be modified as required for wet weather conditions. Where clean-up is beyond the resources or capabilities of City of Vista and Buena Sanitation District staff, the City of Vista and Buena Sanitation District may use a contractor to support clean-up operations.

Stormwater Conveyance System
Notify the City’s Stormwater Quality Control staff in the event a spill impacts any waterways. Clean the spill area and drainage conveyance system in a manner that does not inadvertently impact beneficial uses in the receiving waters. Contain contaminated creeks where feasible. Remove all contaminated water by pumping to the collection system or vacuuming by means of vacuum truck and return all collected water to the sewer system. Introduce additional wash water as needed to flush contaminated areas towards the containment area.

Hard Surface Areas
Take reasonable steps to contain and vacuum up the wastewater and return it to the wastewater collection system. Collect all signs of sewage solids and sewage-related material either by hand or with the use of rakes and brooms. Wash down the affected area with high pressure water using nozzles on provided on the hydro/combo unit and vacuum the wash water utilizing the hydro/combo unit. Allow area to dry. Repeat the process if additional cleaning is required.
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Landscaped and Unimproved Natural Vegetation
• Collect all signs of sewage solids and sewage-related material either by hand or with the use of rakes and brooms.
• Wash down the affected area with clean water until the water runs clear. The flushing volume should be approximately three times the estimated volume of the spill.
• Either contain or vacuum up the wash water so that none is released. Return the wastewater to the wastewater collection system to the extent possible. • Allow the area to dry. Repeat the process if additional cleaning is required.

Natural and Man-Made Waterways
Notify the City’s Stormwater Quality Control staff in the event a spill impacts any waterways. Clean the spill area and drainage conveyance system in a manner that does not inadvertently impact beneficial uses in the receiving waters. Contain contaminated creeks where feasible. Remove all contaminated water by pumping to the collection system or vacuuming by means of vacuum truck and return all collected water to the sewer system. Introduce additional wash water as needed to flush contaminated areas towards the containment area.

4.4 Wet Weather Modifications
Omit flushing and sampling during heavy storm events with heavy runoff where flushing is not required and sampling would not provide meaningful results.

4.5 Follow Up Activities
If sewage has reached the storm drain system, the hydro/combo unit should be used to vacuum/pump out the catch basin. Flush the storm drain system with wash water and capture all residual wash water at a point of containment downstream.

In the event that an overflow occurs at night, inspect the location early on the following morning. The operator should look for any signs of sewage solids and sewage-related material that may warrant additional cleanup activities.

If the City of Vista and Buena Sanitation District sewer causes an overflow on a private property, restore flow and notify the Supervisor or Operations Manager and they will notify the Director of Public Works and the Risk Manager to determine if any immediate steps to rectify the issue are required. Provide the customer with the contact information for the Collections Systems Supervisor and the Risk Manager to make a claim, pending investigation

4.6 Traffic And Crowd Control
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Place barricades, cones, traffic arrow board, and caution tape and other traffic control devices as needed to keep vehicles and pedestrians away from contact with spilled sewage.

4.7 Public Notification
If a spill affects a waterway or ocean requiring posting of signage, contact the County of San Diego, Department of Food & Housing. The County will inform personnel where and when to post and remove signage for waterways and beach closures as required and will not remove the signs until the effects of the spill have been mitigated.

Major spills may warrant broader public notice. The Collection Systems Operations Manager and/or Collection System Operations Supervisor will contact the City of Vista’s Communications Officer. He will create and execute the outreach plan for media. If media crews show up at a job site the crews will ask media personnel to wait and will contact the Communications Officer immediately. Do not respond to questions from the media or interview requests unless the Communications Officer or the Operations Manager or Supervisor provides direction and permission. The approval of the Communications Officer is required prior to contacting local media when significant areas may have been contaminated by sewage.

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5 Spill Event Investigation
The objective of the spill event investigation is to determine the cause of the spill and to identify corrective action(s) needed that will reduce or eliminate potential for the spill to recur.

The investigation includes reviewing all relevant data to determine appropriate corrective action(s) for the line segment. The investigation will be conducted by the Supervisor and reported to the Director of or his/her designee. The investigation should include:
• Reviewing and completing/correcting the Sanitary Sewer Overflow Report Form; • Reviewing available photographs;
• Reviewing historical maintenance activities
• Conducting a CCTV inspection to determine the condition a portion of the line segment immediately following the spill and reviewing the video and logs; and • If FOG related, reviewing the results of a FOG source control investigation • Debrief with staff who responded to the spill.

The goal of the spill event investigation is to determine the cause of the spill event and to identify appropriate corrective actions. The City of Vista and Buena Sanitation District’s standard practice is, at a minimum, to perform additional cleaning of the pipe containing the blockage that caused the spill event along with the pipes immediately upstream and downstream.

All spills should be thoroughly investigated and documented for use in managing the wastewater collection system and meeting established reporting requirements.

5.1 Spill Categories
The California State Water Resources Control Board (SRWCB) has established guidelines for classifying and reporting spills. Reporting and documentation requirements vary based on the type of spill. Categories of spills as defined by the SWRCB:
• Category 1 – A spill of any volume of sewage from or caused by a sanitary sewer system regulated under this General Order that results in a discharge to:
o A surface water, including a surface water body that contains no flow or volume of water; or
o A drainage conveyance system that discharges to surface waters when the sewage is not fully captured and returned to the sanitary sewer system or disposed of properly.

Any spill volume not recovered from a drainage conveyance system is considered a discharge to surface water, unless the drainage conveyance system discharges to a dedicated stormwater infiltration basin or facility. • Category 2 – A spill of 1,000 gallons or greater, from or caused by a sanitary sewer system regulated under this General Order that does not discharge to a surface water. A spill of 1,000 gallons or greater that spills out of a lateral and is 04/22/2025
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caused by a failure or blockage in the sanitary sewer system, is a Category 2 spill.
• Category 3 – A spill of equal to or greater than 50 gallons and less than 1,000 gallons, from or caused by a sanitary sewer system regulated under the WDR that does not discharge to a surface water. A spill of equal to or greater than 50 gallons and less than 1,000 gallons, that spills out of a lateral and is caused by a failure or blockage in the sanitary sewer system is a Category 3 spill. • Category 4 – A spill of less than 50 gallons, from or caused by a sanitary sewer system regulated under this General Order that does not discharge to a surface water. A spill of less than 50 gallons that spills out of a lateral and is caused by a failure or blockage in the sanitary sewer system is a Category 4 spill. • Private Lateral Sewage Discharges – Sewage discharges of untreated or partially treated wastewater resulting from blockages or other problems within a privately-owned lateral connected to the enrollee’s sanitary sewer system or from other private sewer assets. PLSDs that the enrollee becomes aware of can be reported to the California Integrated Water Quality System (CIWQS) Online Sanitary Sewer System Database.

5.2 Internal Spill Reporting Procedures
The Collection Systems Primary Responder will fill out the Standby Incident Report Form located in the CityWorks database and submit it to the Supervisor. The Supervisor will review the report and will send a copy to necessary staff documenting all field activities.

Necessary staff includes Wastewater Division administrative personnel, operations management, and/or executive management. The Program Assistant is required to enter all required information into the State Water Resources Control Board (SWRCB) California Integrated Water Quality System (CIWQS) Online Sanitary Sewer System Database. The Legally Responsible Official (LRO) has the responsibility of certifying the Spill Reports.

5.3 External Spill Reporting Procedures
CIWQS is used for reporting spill information to the SWRCB whenever possible. A summary of external reporting requirements and contact information is included in Table 5-1 and Figure 5-1.

Category 1 Spills
If a Category 1 spills results in a discharge to a drainage channel or surface waters, the following reporting requirements apply:

Draft Spill Report for Category 1 Spills
Within three (3) business days of the Enrollee’s knowledge of a Category 1 spill, the Enrollee shall submit a Draft Spill Report to the online CIWQS Sanitary Sewer System Database. The Draft Spill Report must, at minimum, include the following items:
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2. Contact information: Name and telephone number of Enrollee contact person to respond to spill-specific questions;

3. Spill location name;

4. Date and time the Enrollee was notified of, or self-discovered, the spill;

5. Operator arrival time;

6. Estimated spill start date and time;

7. Date and time the Enrollee notified the California Office of Emergency Services, and the assigned control number;

8. Description, photographs, and GPS coordinates of the system location where the spill originated;
• If a single spill event results in multiple appearance points, provide GPS coordinates for the appearance point closest to the failure point and describe each additional appearance point in the spill appearance point explanation field;

9. Estimated total spill volume exiting the system;

10. Description and photographs of the extent of the spill and spill boundaries;

11. Did the spill reach a drainage conveyance system? If Yes:
• Description of the drainage conveyance system transporting the spill; • Photographs of the drainage conveyance system entry location(s); • Estimated spill volume fully recovered from the drainage conveyance system; • Estimated spill volume remaining within the drainage conveyance system;

12. Description and photographs of all discharge point(s) into the surface water;

13. Estimated spill volume that discharged to surface waters; and

14. Estimated total spill volume recovered.

Certified Spill Report for Category 1 Spills
Within 15 calendar days of the spill end date, the Enrollee shall submit a Certified Spill Report for Category 1 spills, to the online CIWQS Sanitary Sewer System Database.

Upon completion of the Certified Spill Report, the online CIWQS Sanitary Sewer System Database will issue a final spill event identification number.

The Certified Spill Report must, at minimum, include the following mandatory information in addition to all information in the Draft Spill Report per the previous section (Draft Spill Report for Category 1 Spills) above:

1. Description of the spill event destination(s), including GPS coordinates if available, that represent the full spread and reach of the spill;

2. Spill end date and time;

3. Description of how the spill volume estimations were calculated, including at a minimum:
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• The methodology, assumptions and type of data relied upon, such as supervisory control and data acquisition (SCADA) records, flow monitoring or other telemetry information used to estimate the volume of the spill discharged, and the volume of the spill recovered (if any volume of the spill was recovered), and • The methodology(ies), assumptions and type of data relied upon for estimations of the spill start time and the spill end time;

4. Spill cause(s) (for example, root intrusion, grease deposition, etc.);

5. System failure location (for example, main, lateral, pump station, etc.);

6. Description of the pipe material, and estimated age of the pipe material, at the failure location;

7. Description of the impact of the spill;

8. Whether or not the spill was associated with a storm event;

9. Description of spill response activities including description of immediate spill containment and cleanup efforts;

10. Description of spill corrective action, including steps planned or taken to reduce, eliminate, and prevent reoccurrence of the spill, and a schedule of major milestones for those steps;

11. Spill response completion date;

12. Detailed narrative of investigation and investigation findings of cause of spill;

13. Reasons for an ongoing investigation (as applicable) and the expected date of completion;

14. Name and type of receiving water body(s);

15. Description of the water body(s), including but not limited to:
• Observed impacts on aquatic life,
• Public closure, restricted public access, temporary restricted use, and/or posted health warnings due to spill,
• Responsible entity for closing/restricting use of water body, and • Number of days closed/restricted as a result of the spill.

16. Whether or not the spill was located within 1,000 feet of a municipal surface water intake; and

17. If water quality samples were collected, identify sample locations and the parameters the water quality samples were analyzed for. If no samples were taken, Not Applicable shall be selected
Spill Technical Report for Individual Category 1 Spills For any spill in which 50,000 gallons or greater discharged into a surface water, within 45 calendar days of the spill end date, the Enrollee shall submit a Spill Technical Report to the online CIWQS Sanitary Sewer System Database. The Spill Technical Report, at minimum, must include the following information:
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18. Spill causes and circumstances, including at minimum:
• Complete and detailed explanation of how and when the spill was discovered; • Photographs illustrating the spill origin, the extent and reach of the spill, drainage conveyance system entrance and exit, receiving water, and post-cleanup site conditions;
• Diagram showing the spill failure point, appearance point(s), the spill flow path, and ultimate destinations;
• Detailed description of the methodology employed, and available data used to calculate the discharge volume and, if applicable, the recovered spill volume; • Detailed description of the spill cause(s);
• Description of the pipe material, and estimated age of the pipe material, at the failure location; Description of the impact of the spill; • Copy of original field crew records used to document the spill; and • Historical maintenance records for the failure location.

19. Enrollee’s response to the spill:
• Chronological narrative description of all actions taken by the Enrollee to terminate the spill;
• Explanation of how the Sewer System Management Plan Spill Emergency Response Plan was implemented to respond to and mitigate the spill; and • Final corrective action(s) completed and a schedule for planned corrective actions, including:
o Local regulatory enforcement action taken against an illicit discharge in response to this spill, as applicable,
o Identifiable system modifications, and operation and maintenance program modifications needed to prevent repeated spill occurrences, and o Necessary modifications to the Emergency Spill Response Plan to incorporate lessons learned in responding to and mitigating the spill.

20. Water Quality Monitoring, including at minimum:
• Description of all water quality sampling activities conducted; • List of pollutant and parameters monitored, sampled and analyzed; as required in Section 3.7 (Receiving Water Monitoring) of Attachment B; • Laboratory results, including laboratory reports;
• Detailed location map illustrating all water quality sampling points; and • Other regulatory agencies receiving sample results (if applicable).

21. Evaluation of spill impact(s), including a description of short-term and long-term impact(s) to beneficial uses of the surface water.
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Amended Certified Spill Reports for Individual Category 1 Spills The Enrollee shall update or add additional information to a Certified Spill Report within 90 calendar days of the spill end date by amending the report or by adding an attachment to the Spill Report in the online CIWQS Sanitary Sewer System Database.

The Enrollee shall certify the amended report.

After 90 calendar days, the Enrollee shall contact the State Water Board at [email protected] to request to amend a Spill Report. The Legally Responsible Official shall submit justification for why the additional information was not reported within the Amended Spill Report due date.

Category 2 Spills
If a Category 2 spill occurs, the following reporting requirements apply:

Draft Spill Report for Category 2 Spills
Within three (3) business days of the Enrollee’s knowledge of a Category 2 spill, the Enrollee shall submit a Draft Spill Report to the online CIWQS Sanitary Sewer System Database. The Draft Spill Report must, at minimum, include the following items:

1. Contact information: Name and telephone number of Enrollee contact person to respond to spill-specific questions;

2. Spill location name;

3. Date and time the Enrollee was notified of, or self-discovered, the spill;

4. Operator arrival time;

5. Estimated spill start date and time;

6. Date and time the Enrollee notified the California Office of Emergency Services, and the assigned control number;

7. Description, photographs, and GPS coordinates of the system location where the spill originated;
• If a single spill event results in multiple appearance points, provide GPS coordinates for the appearance point closest to the failure point and describe each additional appearance point in the spill appearance point explanation field;

8. Estimated total spill volume exiting the system;

9. Description and photographs of the extent of the spill and spill boundaries;

10. Did the spill reach a drainage conveyance system? If Yes:
• Description of the drainage conveyance system transporting the spill; • Photographs of the drainage conveyance system entry location(s); • Estimated spill volume fully recovered from the drainage conveyance system; • Estimated spill volume remaining within the drainage conveyance system; • Estimated spill volume discharge to a groundwater infiltration basin or facility, if applicable; and
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11. Estimated total spill volume recovered.

Certified Spill Report for Category 2 Spills
Within 15 calendar days of the spill end date, the Enrollee shall submit a Certified Spill Report for the Category 2 spill, to the online CIWQS Sanitary Sewer System Database.

Upon completion of the Certified Spill Report, the online CIWQS Sanitary Sewer System Database will issue a final spill event identification number.

1. Description of the spill event destination(s), including GPS coordinates if available, that represent the full spread and reach of the spill;

2. Spill end date and time;

3. Description of how the spill volume estimations were calculated, including at a minimum:
• The methodology, assumptions and type of data relied upon, such as supervisory control and data acquisition (SCADA) records, flow monitoring or other telemetry information used to estimate the volume of the spill discharged, and the volume of the spill recovered (if any volume of the spill was recovered), and • The methodology(ies), assumptions and type of data relied upon for estimations of the spill start time and the spill end time;

4. Spill cause(s) (for example, root intrusion, grease deposition, etc.);

5. System failure location (for example, main, pump station, etc.);

6. Description of the pipe/infrastructure material, and estimated age of the pipe material, at the failure location;

7. Description of the impact of the spill;

8. Whether or not the spill was associated with a storm event;

9. Description of spill response activities including description of immediate spill containment and cleanup efforts;

10. Description of spill corrective action, including steps planned or taken to reduce, eliminate, and prevent reoccurrence of the spill, and a schedule of major milestones for those steps;

11. Spill response completion date;

12. Detailed narrative of investigation and investigation findings of cause of spill;

13. Reasons for an ongoing investigation (as applicable) and the expected date of completion; and

14. Whether or not the spill was located within 1,000 feet of a municipal surface water intake.

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Amended Certified Spill Reports for Individual Category 2 Spills The Enrollee shall update or add additional information to a Certified Spill Report within 90 calendar days of the spill end date by amending the report or by adding an attachment to the Spill Report in the online CIWQS Sanitary Sewer System Database.

The Enrollee shall certify the amended report.

Category 3 Spills
If a Category 3 spill occurs, the following reporting requirements apply:

Monthly Certified Spill Reporting for Category 3 Spills The Enrollee shall report and certify all Category 3 spills to the online CIWQS Sanitary Sewer System Database within 30 calendar days after the end of the month in which the spills occurred. After the Legally Responsible Official certifies the spills, the online CIWQS Sanitary Sewer System Database will issue a spill event identification number for each spill. The monthly reporting of all Category 3 spills must include the following items for each spill:

1. Contact information: Name and telephone number of Enrollee contact person to respond to spill-specific questions;

2. Spill location name;

3. Date and time the Enrollee was notified of, or self-discovered, the spill;

4. Operator arrival time;

5. Estimated spill start date and time;

6. Description, photographs, and GPS coordinates where the spill originated:
• If a single spill event results in multiple appearance points, provide GPS coordinates for the appearance point closest to the failure point and describe each additional appearance point in the spill appearance point explanation field;

7. Estimated total spill volume exiting the system;

8. Description and photographs of the extent of the spill and spill boundaries;

9. Did the spill reach a drainage conveyance system? If Yes:
• Description of the drainage conveyance system transporting the spill; • Photographs of the drainage conveyance system entry locations(s); • Estimated spill volume fully recovered from the drainage conveyance system; an • Estimated spill volume discharged to a groundwater infiltration basis or facility, if applicable.

10. Estimated total spill volume recovered;
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11. Description of the spill event destination(s), including GPS coordinates, if available, that represent the full spread and reaches of the spill;

12. Spill end date and time;

13. Description of how the spill volume estimations were calculated, including, at minimum:
• The methodology and type of data relied upon, including supervisory control and data acquisition (SCADA) records, flow monitoring or other telemetry information used to estimate the volume of the spill discharged, and the volume of the spill recovered (if any volume of the spill was recovered), and • The methodology and type of data relied upon to estimate the spill start time, on- going spill rate at time of arrival (if applicable), and the spill end time;

14. Spill cause(s) (for example, root intrusion, grease deposition, etc.);

15. System failure location (for example, main, pump station, etc.);

16. Description of the pipe/infrastructure material, and estimated age of the pipe/infrastructure material, at the failure location;

17. Description of the impact of the spill;

18. Whether or not the spill was associated with a storm event;

19. Description of spill response activities including description of immediate spill containment and cleanup efforts;

20. Description of spill corrective actions, including steps planned or taken to reduce, eliminate, and prevent reoccurrence of the spill, and a schedule of the major milestones for those steps; including, at minimum:
• Local regulatory enforcement action taken against an illicit discharge in response to this spill, as applicable, and
• Identifiable system modifications, and operation and maintenance program modifications needed to prevent repeated spill occurrences at the same spill event location, including:
o Adjusted schedule/method of preventive maintenance,
o Planned rehabilitation or replacement of sanitary sewer asset, o Inspected, repaired asset(s), or replaced defective asset(s), o Capital improvements,
o Documentation verifying immediately implemented system modifications and operating/maintenance modifications,
o Description of spill response activities,
o Spill response completion date, and
o Ongoing investigation efforts, and expected completion date of investigation to determine the full cause of spill;

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Amended Certified Spill Reports for Category 3 Spills
Within 90 calendar days of the certified Spill Report due date, the Enrollee may update or add additional information to a certified Spill Report by amending the report or by adding an attachment to the Spill Report in the online CIWQS Sanitary Sewer System Database.

The Enrollee shall certify the amended report.

After 90 calendar days, the Legally Responsible Official shall contact the State Water Board at [email protected] to request to amend a certified Spill Report. The Legally Responsible Official shall submit justification for why the additional information was not reported within the 90-day timeframe for amending the certified Spill Report, as provided above.

Category 4 Spills
If a Category 4 spill occurs the following reporting requirements apply:

Monthly Certified Spill Reporting for Category 4 Spills The Enrollee shall report and certify the estimated total spill volume exiting the sanitary sewer system, and the total number of all Category 4 spills to the online CIWQS Sanitary Sewer System Database, within 30 calendar days after the end of the month in which the spills occurred.

Annual Certified Spill Reporting of Category 4 Spills
For all Category 4 spills that are caused by a failure or blockage in the lateral and that do not discharge to a surface water, the Enrollee shall:

Maintain records that will be provided upon request by State Water Board or Regional Water Board staff;
Annually upload and certify a report, in an appropriate digital format, of all recordkeeping of spills to the online CIWQS Sanitary Sewer System Database, by February 1st after the end of the calendar year in which the spills occurred.

An Enrollee will maintain the following records for each individual Category 4 spill:

1. Contact information: Name and telephone number of Enrollee contact person to respond to spill-specific questions;

2. Spill location name;

3. Description and GPS coordinates for the system location where the spill originated;

4. Did the spill reach a drainage conveyance system? If Yes:

5. Description of drainage conveyance system location,
• Estimated spill volume fully recovered within the drainage conveyance system, and
• Estimated spill volume remaining within the drainage conveyance system;

6. Estimated total spill volume exiting the sanitary sewer system;

7. Spill date and start time;
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8. Spill cause(s) (for example, root intrusion, grease deposition, etc.);

9. System failure location (for example, main, pump station, etc.);

10. Description of spill response activities including description of immediate spill containment and cleanup efforts;

11. Description of how the volume estimation was calculated, including, at minimum:
• The methodology and type of data relied upon, including supervisory control and data acquisition (SCADA) records, flow monitoring or other telemetry information used to estimate the volume of the spill discharged, and the volume of the spill recovered (if any volume of the spill was recovered), and • The methodology and type of data relied upon to estimate the spill start time, on- going spill rate at time of arrival (if applicable), and the spill end time;

12. Description of implemented system modifications and operating/maintenance modifications
Private Lateral Sewage Discharges
Private lateral sewage discharges that exceed 1000 gallons, result in a discharge to a drainage channel and/or surface water; and/or discharge to a storm drainpipe that was not fully captured and returned to the sanitary sewer system, shall be reported to the Regional Board by phone or fax or email within 24 hours of the City becoming aware per Order R9-2007-0005.

Within 24 hours of becoming aware of a spill from a private sewer lateral or private sanitary sewer system that is not owned/operated by the City, the City is encouraged to report the following observations to the online CIWQS Sanitary Sewer System Database at the following link: https://ciwqs.waterboards.ca.gov:
• A spill equal or greater than 1,000 gallons that discharges (or has a potential to discharge) to a water of the State, or a drainage conveyance system that discharges to waters of the State; or
• Any volume of sewage that discharges (or has a potential to discharge) to surface waters.

In the CIWQS module, the City is encouraged to identify:
• Time of observation;
• Description of general spill location (for example, street name and cross street names);
• Estimated volume of spill;
• If known, general description of spill destination (for example, flowing into drainage channel, flowing directly into a creek, etc.); and • If known, name of private system owner/operator.

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only. The CIWQS database will only make information regarding the actual spill, accessible to the public.

5.4 No Spill Certification Or Category 4 Spills And/Or Non - Category 1 Lateral Spills (Monthly)
If either (1) no spills occur during a calendar month or (2) only Category 4 occur during a calendar month, the Enrollee shall certify, within 30 calendar days after the end of each calendar month, either a “No-Spill” certification statement, or a “Category 4 Spills” certification statement, in the online CIWQS Sanitary Sewer System Database, certifying that there were either no spills, or Category 4 spills that will be reported annually for the designated month.

If a spill starts in one calendar month and ends in a subsequent calendar month, and the City has no further spills of any category, in the subsequent calendar month, the City shall certify “no-spills” for the subsequent calendar month.

If the City has no spills from its systems during a calendar month, but the City voluntarily reported a spill from a private lateral or a private system, the City shall certify “no-spills” for that calendar month.

5.5 Certified Spill Reporting Of Category 4 and/or Lateral Spills (Annually)
For all Category 4 spills and spills from private laterals that are caused by a failure or blockage in the lateral and that do not discharge to a surface water, the City will:
• Maintain digital records of Category 4 containing information provided in Section

5.3.4 of the Spill Emergency Response Plan and lateral spills; The City shall provide records upon request by State Water Board or Regional Water Board staff.
• Annually upload and certify a report, in an appropriate digital format, of all recordkeeping of spills to the online CIWQS Sanitary Sewer System Database, by February 1st after the end of the calendar year in which the spills occurred.

5.6 CIWQS Not Available
In the event that the CIWQS Sanitary Sewer System Database is not available, the Legally Responsible Official or his/her designee will provide all required information to the appropriate RWQCB office in accordance with the time schedules identified above. In such event, the City of Vista and Buena Sanitation District will submit the appropriate reports using the CIWQS Sanitary Sewer System Database as soon as practical.

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Figure 5-1. Spill Report Flow Chart
Wastewater Supervisor, Public
Works Operations Manager, or
Sewer Engineering Division Manager
First Responder or Spill
Response Crew
Notify Wastewater Division
Standby Personnel, Wastewater Supervisor, and Public
Works Operations Manager.

If above are not available, notify Sewer Engineering
Division Manager, Public Works DirectorEmergency Regulatory Notifications (For Category 1 and 2 Spills, verbal notification within 2 hours the enrollee becomes aware and obtain OES incident number)
California Office of Emergency Services (Cal OES)
(Call Cal OES at 1-800-852-7550)
(For Category 1 Spills, notify) Regional Water Quality Control Board, Region 9
(Call 619-516-1990 or 858-467-2952)
(For Category 1 spills over 50,000 gallons, notify) Stormwater Program Manager (Call 760-643-2804 or 760-420-6819) and County of San Diego, Department of Environmental Health and Quality (Call 858-565-6903) (For Private Lateral Sewer Discharges over 1,000 gallons, notify within 24 hours) Regional Water Quality Control Board, Region 9
(Call 619-516-1990 or 858-467-2952)
Spill Field Documentation
Complete Incident Report in Cityworks
Document Spill Volume & Flow Measurement Methodology
Photograph Spill Event
Water Quality Samples for Cat 1 Spills 50,000 or greater within 18 hours of becoming aware of spill
Document Bypass Operations/Containment Efforts
Document Construction Activities
Clean-up Activities
Document Impacted Water Systems
Response Staff/Equipment
Staff/Hydro Combination Equipment
Mobile Bypass Pumps & Hose
Containment Materials/Mobile Unit
Traffic Control/Notify Contractor
Mutual Aid Request
EOC Activation
Mitigation of Spill
Contain Spill/Capture Sewage
Prevent Spill from Reaching Storm Drain or Water Body
Look for Opportunities to Plug Storm Drains (If Needed) Check Upstream and Downstream Manholes to Identify
Location of Issue
Set Up Hydro -Jetter Downstream for Blockage Removal
Return Sewage to Collection System
Determine Contaminated Area
Clean-up Contaminated Area (Vacuum, Collect all Debris by Hand/Rake/Broom, Wash -Down, Vacuum)
Identify Impacted Water Systems
Request Water Quality Samples
Return the Following Day to Confirm Spill Clean -Up has been Completed
CIWQS Spill Online Reporting
(Information provided by the first responder)
Sewer Eng. Manager (LRO/Report Certification)
PW Operations Manager (LRO Delegate/Report Review)
Wastewater Supervisor (Report Review/Data Submitter)
Sewer Admin., Program Assistant (Data Submitter)
eFile Spill Documentation
File Incident Report
Document Spill Volume & Flow Measurement
Methodology
File Photograph Spill Event
File Water Quality Sample Results
Documented Bypass Operations/Containment Efforts
Documented Construction Activities
Documented Clean -up Activities
Documented Impacted Water Systems
File Required Technical Report, if required

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Table 5-1. Reporting and Certification Checklist
Type of Spill Agency(s) to
notify
Notification Timeframe Report Timeframe
Category 1 – Any volume discharge of sewage
resulting from a failure or flow condition in the City
or District’s sanitary sewer collection system that
results in discharge to:
• A surface water, including a surface water body
that contains no flow or volume of water; or
• A drainage conveyance system that discharges to
surface waters when the sewage is not fully
captured and returned to the sanitary sewer
system or disposed of properly.
• Any spill volume not recovered from a drainage
conveyance system is considered a discharge to
surface water, unless the drainage conveyance
system discharges to a dedicated stormwater
infiltration basin or facility
Cal-OES
RWQCB
For spills over
50,000 gallons
notify Stormwater
Program Manager
during business
hours, after hours
notify San Diego
County DEH.

Within 2 hours of City staff
becoming aware of any
Category 1 Spill, notify the
Cal-OES and obtain a
notification control number.

Submit draft report on CIWQS within 3 business days
of becoming aware of the spill.

Certify within 15 calendar days of the spill end date.

Technical Report: Submit within 45 calendar days after
the end date of any Category 1 Spill in which 50,000
gallons or greater is spilled to surface waters.

Submit Amended Spill Report within 90 calendar days
after the spill end date.

Category 2 – Discharges of untreated or partially
treated wastewater of 1,000 gallons or greater that
do not reach surface water.

Cal-OES

Within 2 hours of City staff
becoming aware of any
Category 2 Spill greater
than or equal to 1,000
gallons, notify the Cal-OES
and obtain a notification
control number.

Submit draft report on CIWQS within 3 business days
of becoming aware of the spill.

Certify within 15 calendar days of the spill end date.

Submit Amended Spill Report within 90 calendar days
after the spill end date.

Category 3 – Discharges equal to or greater than 50
gallons and less than 1,000 gallons, from or caused
by a sanitary sewer system that does not discharge
to a surface water.

N/A N/A 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
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Type of Spill Agency(s) to
notify
Notification Timeframe Report Timeframe
Category 4 – Discharges less than 50 gallons, from
or caused by a sanitary sewer system that does not
discharge to a surface water.

N/A N/A 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. There are additional Annual Reporting
Requirements for Category 4.

Private lateral sewage discharges that are caused
by blockages or other problems within a privately
owned lateral or other private sewer assets.

RWQCB Within 24 hours for
discharges that exceed
1,000 gallons, result in
discharge to a drainage
channel and/or surface
water; and/or discharge to
a storm drain pipe that was
not fully captured and
returned to the sanitary
sewer system.

Private lateral sewage discharges are encouraged to
be reported to the online CIWQS Sanitary Sewer
System Database based upon the SDRWQCB order.

The Enrollee must identify the sewage discharge as
occurring and caused by a private lateral, and a
responsible party should be identified, if known.

No Spill or Category 4 Spill Report CIWQS Monthly “No Spill” or “Category 4 Spill” Certification: Certify that no spills occurred within 30 calendar days of the end of the month in which no spills occurred or certify that only Category 4 spills occurred.
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Type of Spill Agency(s) to
notify
Notification Timeframe Report Timeframe
CIWQS Two-Hour Notification
SWRCB Reporting Timeframes Depend on the Size
and Final Destination of the spill.

CIWQS must be used for reporting if the website is
available (https://ciwqs.waterboards.ca.gov). The
spill database will automatically generate an email
notification with customized information about the
spill upon initial reporting and final certification for all Category 1 Spills.

Fax or call RWQCB (only if website is down).

1. California Office of Emergency Services (Cal OES)
Phone: (800) 852-7550 – ask for an “OES Control Number” (for RWQCB)

2. County of San Diego, Department of Environmental Health Phone: (858) 565-6903 E-mail: [email protected]

3. RWQCB (Region 9 – San Diego; Region 9 – San Diego)
Option of phoning in the 2-hour notification and follow up within 24 hours using the online certification or utilize the online feature for both.

RWQCB, Region 9
Mireille Garcia: (619) 521-3356 Primary Phone: (619) 516-1990 Fax: (619) 516-1994 Email: [email protected]
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5.7 Annual Report
Refer to WDR order number 2022-0103-DWQ for annual reporting requirements of Category 4 spills and other annual report requirements. The City will certify in its annual report that the SERP is up to date.

5.8 Internal Spill Documentation
The Collection Systems Primary Responder will complete the Spill Response Field Report Form and provide a draft report to the Supervisor or his/her designee. The Supervisor will assemble all available documentation and review, complete, and submit an internal report of all available information to appropriate City of Vista and Buena Sanitation District staff via e-mail.

The Legally Responsible Official or his/her designee will prepare an electronic file for each individual spill. The electronic file should include the following information if available:
• Initial service call information;
• Spill Response Field Report;
• Online Spill Reporting System form;
• Volume estimate;
• Map showing the spill location;
• Photographs of spill location;
• CCTV inspection data, if applicable;
• Water quality sampling and test results, if applicable; • Spill event investigation results; and
• Any other forms or data related to the spill.

Private Lateral Sewer Discharges
The Collection Systems Primary Responder will complete the Spill Response Field Report Form and provide a draft report to the Supervisor or his/her designee. The Supervisor will assemble all available documentation and review, complete, and submit an internal report of all available information to appropriate City of Vista and Buena Sanitation District staff via e-mail.

A separate electronic file will be prepared for each individual PLSD, at the discretion of the Legally Responsible Official. The file will include any relevant information from the above list.

5.9 External Spill Record Keeping Requirements
The WDR requires that individual spill records be maintained for a minimum of five years from the date of the spill. This period may be extended when requested by a Regional 04/22/2025
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Water Quality Control Board Executive Officer. All records shall be made available for review upon State or Regional Water Board staff's request. Records shall be retained for all spills, including but not limited to the following when applicable:
• Spill event complaint, including but not limited to records documenting how the Enrollee responded to notifications of spills. Each complaint record must, at a minimum, include the following information:
o Date, time, and method of notification
o Date and time the complainant first noticed the spill, if available, o Narrative description of the complaint, including any information the caller provided regarding whether the spill has reached surface waters or a drainage conveyance system, if available,
o Complainant’s contact information, if available, and
o Final resolution of the complaint;
• Records documenting the steps and/or remedial action(s) undertaken by the Enrollee, using all available information, to comply with this General Order • Records documenting how estimate(s) of volume(s) and, if applicable, volume(s) of spill recovered were calculated;
• All California Office of Emergency Services notification records, as applicable; and
• Records, in accordance with the Monitoring Requirements in this Attachment.

For water quality samples required by spills of 50,000 gallons or greater as a result of any spill, records of monitoring information shall include:
• The date, exact place, and time of sampling or measurements; • The individual(s) who performed the sampling or measurements; • The date(s) analyses were performed;
• The individual(s) who performed the analyses;
• The analytical technique or method used;
• Photos taken; and
• The results of such analyses.

5.10 Post Spill Event Debriefing
As soon as possible after major spill events, all of the participants, from the person who received the call to the last person to leave the site, should meet to review the procedures used and to discuss what worked and where improvements could be made in responding to and mitigating future spill events.

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6 Equipment
This section provides a list of specialized equipment that should be used to support this Sanitary Sewer Overflow Emergency Response Plan.
• Camera -- A digital or disposable camera to record the conditions upon arrival, during clean up, and upon departure.
• Closed Circuit Television (CCTV) Inspection Unit – A CCTV Inspection Unit to determine the cause for all spills from gravity sewers. • Combination Sewer Cleaning Truck -- A combination high velocity sewer cleaning truck with vacuum tank to clear blockages in gravity sewers, vacuum spilled sewage, and wash down the impacted area following the spill event. • Emergency Response Trailer -- A trailer to store and transport the equipment needed to effectively respond to sewer emergencies. The equipment and tools should include containment and clean up materials: sandbags, barricades, cones, caution tape, signs, rakes, drop-inlet mats, and plastic sheeting. • Portable Generators, Portable Pumps, Piping, and Hoses -- Portable equipment used to support this plan is available at the Operations Facility.

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7 Spill Response Training
This section provides information on the training that is required to support this Spill Emergency Response Plan.

7.1 Initial And Annual Refresher Training
All City of Vista and Buena Sanitation District personnel who may have a role in responding to, reporting, and/or mitigating a wastewater collection system overflow receive annual training on the contents of this SERP. All new employees receive training before they are placed in a position where they may have to respond.

7.2 Spill Training Record Keeping
The City of Vista and Buena Sanitation District maintains records for all SERP training provided in support of this plan. The records for all scheduled training courses and for each overflow emergency response training event include date, time, place, content, name of trainer(s), and names of attendees.

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8 Contractors Working on Public Sewer
Facilities
All contractors working on City of Vista and Buena Sanitation District sewer facilities are required to develop an overflow response plan, which identifies who the contractor will contact at the City of Vista and Buena Sanitation District and any actions a contractor is required to perform in the event of a spill.

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9 Annual Review and Update of the SERP
Annually, the City and District will review and assess effectiveness of the Spill Emergency Response Plan, and update the Plan as needed.

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Attachment F2. Spill Response Quick Reference
Guide

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Attachment F3. Sample Templates for Spill
Volume Estimation

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TABLE 'A'

ESTIMATED SPILL FLOW OUT OF M/H WITH COVER IN PLACE
24" COVER 36" COVER

Disclaimer:

This sanitary sewer overflow table was developed by Ed Euyen, Civil Engineer, P.E. No. 33955, California, for County Sanitation District 1. This table is provided as an example.

Other Agencies may want to develop their own estimating tables.

Height of
spout above
M/H rim
H in inches

SPILL
Q

FLOW
Min. Sewer
size in which
these flows
are possible in gpm in MGD
1/4 1 0.001
1/2 3 0.004
3/4 6 0.008
1 9 0.013
1 1/4 12 0.018
1 1/2 16 0.024
1 3/4 21 0.030
2 25 0.037
2 1/4 31 0.045
2 1/2 38 0.054
2 3/4 45 0.065
3 54 0.077
3 1/4 64 0.092
3 1/2 75 0.107
3 3/4 87 0.125
4 100 0.145
4 1/4 115 0.166
4 1/2 131 0.189
4 3/4 148 0.214
5 166 0.240
5 1/4 185 0.266
5 1/2 204 0.294
5 3/4 224 0.322 6"
6 244 0.352
6 1/4 265 0.382
6 1/2 286 0.412
6 3/4 308 0.444
7 331 0.476
7 1/4 354 0.509
7 1/2 377 0.543
7 3/4 401 0.578 8"
8 426 0.613
8 1/4 451 0.649
8 1/2 476 0.686
8 3/4 502 0.723
9 529 0.761

Height of
spout above
M/H rim
H in inches

SPILL
Q

FLOW
Min. Sewer
size in which
these flows
are possible in gpm in MGD
1/4 1 0.002
1/2 4 0.006
3/4 8 0.012
1 13 0.019
1 1/4 18 0.026
1 1/2 24 0.035
1 3/4 31 0.044
2 37 0.054
2 1/4 45 0.065
2 1/2 55 0.079
2 3/4 66 0.095
3 78 0.113
3 1/4 93 0.134
3 1/2 109 0.157
3 3/4 127 0.183
4 147 0.211
4 1/4 169 0.243
4 1/2 192 0.276
4 3/4 217 0.312 6"
5 243 0.350
5 1/4 270 0.389
5 1/2 299 0.430
5 3/4 327 0.471
6 357 0.514
6 1/4 387 0.558 8"
6 1/2 419 0.603
6 3/4 451 0.649
7 483 0.696
7 1/4 517 0.744
7 1/2 551 0.794
7 3/4 587 0.845 10"
8 622 0.896
8 1/4 659 0.949
8 1/2 697 1.003
8 3/4 734 1.057
9 773 1.113

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The formula used to develop Table A measures the maximum height of the water coming out of the maintenance hole above the rim. The formula was taken from hydraulics and its application by A.H. Gibson (Constable & Co. Limited).

Example Overflow Estimation:

The maintenance hole cover is unseated and slightly elevated on a 24” casting. The maximum height of the discharge above the rim is 5 ¼ inches. According to Table A, these conditions would yield a spill of 185 gallons per minute.

FLOW OUT OF M/H WITH COVER IN PLACE

Height to be measured

This sanitary sewer overflow drawing was developed by Debbie Myers, Principal Engineering Technician, for Ed Euyen, Civil Engineer, P.E. No. 33955, California, of County Sanitation District

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TABLE 'B'

ESTIMATED SPILL FLOW OUT OF M/H WITH COVER REMOVED
24" FRAME 36" FRAME

Disclaimer:

This sanitary sewer overflow table was developed by Ed Euyen, Civil Engineer, P.E. No. 33955, California, for County Sanitation District 1. This table is provided as an example.

Other Agencies may want to develop their own estimating tables.

Water
Height above
M/H frame
H in inches

SPILL
Q

FLOW
Min. Sewer
size in which
these flows
are possible in gpm in MGD
1/8 28 0.04
1/4 62 0.09
3/8 111 0.16
1/2 160 0.23
5/8 215 0.31 6"
3/4 354 0.51 8"
7/8 569 0.82 10"
1 799 1.15 12"
1 1/8 1,035 1.49
1 1/4 1,340 1.93 15"
1 3/8 1,660 2.39
1 1/2 1,986 2.86
1 5/8 2,396 3.45 18"
1 3/4 2,799 4.03
1 7/8 3,132 4.51
2 3,444 4.96 21"
2 1/8 3,750 5.4
2 1/4 3,986 5.74
2 3/8 4,215 6.07
2 1/2 4,437 6.39
2 5/8 4,569 6.58 24"
2 3/4 4,687 6.75
2 7/8 4,799 6.91
3 4,910 7.07

Water
Height above
M/H frame
H in inches

SPILL
Q

FLOW
Min. Sewer
size in which
these flows
are possible in gpm in MGD
1/8 49 0.07
1/4 111 0.16
3/8 187 0.27 6"
1/2 271 0.39
5/8 361 0.52 8"
3/4 458 0.66
7/8 556 0.8 10"
1 660 0.95 12"
1 1/8 1,035 1.49
1 1/4 1,486 2.14 15"
1 3/8 1,951 2.81
1 1/2 2,424 3.49 18"
1 5/8 2,903 4.18
1 3/4 3,382 4.87
1 7/8 3,917 5.64 21"
2 4,458 6.42
2 1/8 5,000 7.2 24"
2 1/4 5,556 8
2 3/8 6,118 8.81
2 1/2 6,764 9.74
2 5/8 7,403 10.66
2 3/4 7,972 11.48 30"
2 7/8 8,521 12.27
3 9,062 13.05
3 1/8 9,604 13.83
3 1/4 10,139 14.6
3 3/8 10,625 15.3 36"
3 1/2 11,097 15.98
3 5/8 11,569 16.66
3 3/4 12,035 17.33
3 7/8 12,486 17.98
4 12,861 18.52
4 1/8 13,076 18.83
4 1/4 13,285 19.13
4 3/8 13,486 19.42

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The formula used to develop Table B for estimating spill’s out of maintenance holes without covers is based on discharge over curved weir -- bell mouth spillways for 2” to 12” diameter pipes. The formula was taken from hydraulics and its application by A.H. Gibson (Constable & Co. Limited).

Example Overflow Estimation:

The maintenance hole cover is off and the flow coming out of a 36” frame maintenance hole at one inch (1”) height will be approximately 660 gallons per minute.

FLOW OUT OF M/H WITH COVER REMOVED (TABLE "B")
Height to be measured

This sanitary sewer overflow drawing was developed by Debbie Myers, Principal Engineering Technician, for Ed Euyen, Civil Engineer, P.E. No. 33955, California, of County Sanitation District

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TABLE 'C'

ESTIMATED SPILL FLOW OUT OF M/H PICK HOLE

Note: This chart is based on a 7/8 inch diameter pick hole Disclaimer: This sanitary sewer overflow table was developed by Ed Euyen, Civil Engineer, P.E.

No. 33955, California, for County Sanitation District 1. This table is provided as an example.

Other Agencies may want to develop their own estimating tables.

Height of
spout above
M/H cover
H in inches
SPILL
FLOW
Q
in gpm
1/8 1.0
1/4 1.4
3/8 1.7
1/2 1.9
5/8 2.2
3/4 2.4
7/8 2.6
1 2.7
1 1/8 2.9
1 1/4 3.1
1 3/8 3.2
1 1/2 3.4
1 5/8 3.5
1 3/4 3.6
1 7/8 3.7
2 3.9
2 1/8 4.0
2 1/4 4.1
2 3/8 4.2
2 1/2 4.3
2 5/8 4.4
2 3/4 4.5
2 7/8 4.6
3 4.7
3 1/8 4.8
3 1/4 4.9
3 3/8 5.0
3 1/2 5.1
3 5/8 5.2
3 3/4 5.3
3 7/8 5.4
4 5.5
4 1/8 5.6
4 1/4 5.6
4 3/8 5.7
4 1/2 5.8
4 5/8 5.9
4 3/4 6.0
4 7/8 6.0
5 6.1

Height of
spout above
M/H cover
H in inches
5 1/8
5 1/4
5 3/8
5 1/2
5 5/8
5 3/4
5 7/8
6 6 1/8
6 1/4
6 3/8
6 1/2
6 5/8
6 3/4
6 7/8
7 7 1/8
7 1/4
7 3/8
7 1/2
7 5/8
7 3/4
7 7/8
8 8 1/8
8 1/4
8 3/8
8 1/2
8 5/8
8 3/4
8 7/8
9 9 1/8
9 1/4
9 3/8
9 1/2
9 5/8
9 3/4
9 7/8
10 SPILL
FLOW
Q
in gpm

6.2 6.3

6.3 6.4

6.5 6.6

6.6 6.7

6.8 6.8

6.9 7.0

7.0 7.1

7.2 7.2

7.3 7.4

7.4 7.5

7.6 7.6

7.7 7.7

7.8 7.9

7.9 8.0

8.0 8.1

8.1 8.2

8.3 8.3

8.4 8.4

8.5 8.5

8.6 8.7
Unrestrained
M/H cover will
start to lift
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The formula used to develop Table C is Q=CcVA, where Q is equal to the quantity of the flow in gallons per minute, Cc is equal to the coefficient of contraction (.63), V is equal to the velocity of the overflow, and A is equal to the area of the pick hole. 2 If all units are in feet, the quantity will be calculated in cubic feet per second, which when multiplied by 448.8 will give the answer in gallons per minute. (One cubic foot per second is equal to 448.8 gallons per minute, hence this conversion method).

Example Overflow Estimation:

The maintenance hole cover is in place and the height of water coming out of the pick hole seven- eighths of an inch in diameter (7/8") is 3 inches (3”). This will produce a spill flow of approximately

4.7 gallons per minute.

FLOW OUT OF VENT OR PICK HOLE (TABLE "C")

Height to be measured

This sanitary sewer overflow drawing was developed by Debbie Myers, Principal Engineering Technician, for Ed Euyen, Civil Engineer, P.E. No. 33955, California, of County Sanitation District

1. 2 Velocity for the purposes of this formula is calculated by using the formula h = v squared / 2G, where h is equal to the height of the overflow, v is equal to velocity, and G is equal to the acceleration of gravity.

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Flow Estimation Pictures

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Attachment F4. Encina Wastewater Authority
Environmental Laboratory Accreditation Program
Certification

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Attachment J. SSMP Change Log

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SSMP Change Log
Revision
Number
Date Description of Changes Author
1 5/22/2023 Update of SERP to incorporate changes to be in compliance with new Order 2022-0103-DWQ.

Address deficiencies identified in 2022 SSMP
audit in the body of the SSMP.

HDR/City of Vista
2 5/2/2025 Update of SSMP to incorporate changes to be
in compliance with Order 2022-0103-DWQ.

HDR/City of Vista

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Vista City CouncilApril 22, 2025

Vista City Council
April 22, 2025