2025/06/10 City Council Resolution 2025-037 RESOLUTION NO. 2025-037
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF ROHNERT PARK
APPROVING THE UPDATE AND RECERTIFICATION OF THE SEWER SYSTEM
MANAGEMENT PLAN PURSUANT TO STATE WATER RESOURCES CONTROL
BOARD ORDER WQ 2022-0103-DWQ
WHEREAS, the State Water Resources Control Board ("SWRCB") adopted the
Statewide Sanitary Sewer Systems Order No. WQ 2022-0103-DWQ ("Order"), which requires
publicly owned sanitary sewer systems greater than one mile in length to develop, implement,
and maintain a Sanitary Sewer Management Plan ("SSMP"); and
WHEREAS, the City of Rohnert Park("City") owns and operates a publicly owned
sanitary sewer system and is subject to the requirements of the Order; and
WHEREAS, the City is required to update its SSMP to incorporate changes and
requirements outlined in the Order, including but not limited to updated goals, organizational
structure, legal authority, operations and maintenance procedures, design and performance
provisions, overflow emergency response plan, fats, oils, and grease ("FOG") control program,
system evaluation and capacity assurance, SSMP audits, and communication programs; and
WHEREAS,an updated SSMP has been prepared in compliance with the Order and
reflects current best management practices, operational procedures, and response protocols.
NOW, THEREFORE,BE IT RESOLVED by the City Council of the City of Rohnert
Park that it does hereby approve and recertify the updated Sanitary Sewer Management Plan,
prepared pursuant to the requirements of State Water Resource Control Board Order No. WQ
2022-0103-DWQ and attached hereto as Exhibit A.
BE IT FURTHER RESOLVED that the City Manager or designee is hereby authorized
and directed to execute documents pertaining to same for and on behalf of the City of Rohnert
Park.
DULY AND REGULARLY ADOPTED BY THE C 1 UNCIL OF THE CITY
OF ROHNERT PARK ON this 10th day of June, 2025.
CITY O ' I I '
ra
!._•.
ATTEST: w' d Gius'ce, Mayor
Sylvia Lopez Cuevas, City Clerk
APR S TO FORM:
Mich lle . enyon, City Attorney
Attachments: Exhibit A j
ADAMS: ( i( EL WARD: ODRIGLEZ: SANBORN: /U .GICDICE: J
ES: ( ) NOES: ) ABSENT: ( ) ABSTAIN: (
City of Rohnert Park
Sewer System Management Plan
WDID# 1SSO10016
Originally Prepared: April 2009
Updated 2014, 2019, and 2025
EXHIBIT A
Table of Contents
City of Rohnert Park, Sewer System Management Plan, June 2025 i
Table of Contents
1.0: Element 1 – Goals ................................................................................................................. 1
1.1: Regulatory Context .......................................................................................................... 1
1.2: Sewer System Asset Overview ........................................................................................ 2
1.3: References ........................................................................................................................ 6
2.0: Element 2 – Organization .................................................................................................... 7
2.1: Organization Chart and Contact Information ................................................................... 7
2.1.1: Public Works Department ................................................................................. 8
2.2: Responsible and Authorized Representatives ................................................................ 12
2.3: Chain-of-Communication for Reporting and Responding to Spills ............................... 13
2.4: References ...................................................................................................................... 14
3.0: Element 3 – Legal Authority.............................................................................................. 15
3.1: Agreements ..................................................................................................................... 16
3.1.1: Sonoma State University ................................................................................. 16
3.1.2: Canon Manor West .......................................................................................... 16
3.1.3: Federated Indians of Graton Rancheria ........................................................... 17
3.2: References ...................................................................................................................... 17
4.0: Element 4 – Operations and Maintenance Program ....................................................... 18
4.1: Collection System Map .................................................................................................. 18
4.2: Preventive Maintenance Program .................................................................................. 18
4.2.1: Prioritized Preventive Maintenance................................................................. 18
4.2.2: Non-Routine Maintenance ............................................................................... 20
4.2.3: Preventive Maintenance Scheduling and Tracking ......................................... 20
4.2.4: Corrective Maintenance/Point Repairs ............................................................ 20
4.2.5: Root Control .................................................................................................... 20
4.2.6: SMART Covers ............................................................................................... 20
4.2.7: Manhole Inspections ........................................................................................ 20
4.2.8: Lift Station Inspections .................................................................................... 21
4.2.9: Lift Station Force Mains and Siphon ............................................................... 21
4.3: Training .......................................................................................................................... 21
4.3.1: The CWEA Certification of Competency Standard ........................................ 21
4.4: Contingency Equipment and Replacement Inventories ................................................. 22
4.5: References ...................................................................................................................... 22
4.6: Supplemental Table 4-1: Contingency Equipment ........................................................ 23
5.0: Element 5 – Design and Construction Standards ............................................................ 24
5.1: Standards for Installation, Rehabilitation, and Repair ................................................... 24
5.2: Standards for Inspection and Testing of New Facilities ................................................ 24
5.3: References ...................................................................................................................... 24
6.0: Element 6 – Spill Emergency Response Plan ................................................................... 25
6.1: Existing Documentation ................................................................................................. 25
6.2: Purpose ........................................................................................................................... 26
6.3: Training .......................................................................................................................... 26
Table of Contents
City of Rohnert Park, Sewer System Management Plan, June 2025 ii
6.3.1: Initial and Annual Refresher Training ............................................................. 26
6.3.2: Spill Response Drills ....................................................................................... 27
6.3.3: Spill Training Record Keeping ........................................................................ 28
6.4: Policy .............................................................................................................................. 28
6.5: References ...................................................................................................................... 28
7.0: Element 7 – Sewer Pipe Blockage Control Program ....................................................... 29
7.1: FOG Source Control Program ........................................................................................ 29
7.2: Public Education and Outreach Program ....................................................................... 30
7.3: Plan and Schedule for Disposal of Pipe-Blocking Substances ...................................... 30
7.4: Legal Authority .............................................................................................................. 30
7.5: Authority to Inspect and Regulate Grease Producing Facilities .................................... 31
7.6: Identification of Grease Problem Areas and Sewer Cleaning ........................................ 31
7.7: Implementation of Source Control Measures ................................................................. 31
7.8: References ...................................................................................................................... 31
8.0: Element 8 – System Evaluation and Capacity Assurance Plan ...................................... 33
8.1: Routine Evaluation and Assessment of System Conditions ........................................... 33
8.1.1: Scheduled Pipeline Condition Assessment...................................................... 33
8.1.2: Manhole Condition Assessments..................................................................... 33
8.1.3: Lift Station Assessment ................................................................................... 33
8.1.4: Force Mains and Siphons ................................................................................ 34
8.2: Capacity Assessment and Design Criteria ..................................................................... 34
8.2.1: Hydraulic Analysis .......................................................................................... 34
8.2.2: System Evaluation and Capacity Assurance ................................................... 35
8.2.3: Prioritization of Corrective Actions ................................................................ 36
8.2.4: Capital Improvement Program (CIP) .............................................................. 36
8.2.5: Annual CIP Budget .......................................................................................... 36
8.2.6: Project Funding ............................................................................................... 37
8.3: Joint Coordination .......................................................................................................... 37
8.4: References ...................................................................................................................... 37
9.0: Element 9 – Monitoring, Tracking and Reporting System ............................................. 38
9.1: Adaptive Management ................................................................................................... 38
9.2: Effectiveness .................................................................................................................. 38
9.3: Performance Monitoring and Program Changes ............................................................ 39
9.4: References ...................................................................................................................... 39
10.0: Element 10 – SSMP Audits .............................................................................................. 40
10.1: Audit Responsibilities .................................................................................................. 40
10.2: SSMP Updates .............................................................................................................. 40
10.3: References .................................................................................................................... 41
11.0: Element 11 – Communication Program ......................................................................... 42
11.1: Communication Program ............................................................................................. 42
11.2: Public Communications ............................................................................................... 42
Appendix A: Plan City Council Adoption Documents ........................................................... 43
Appendix B: Plan Internal Audit Reports ............................................................................... 48
Table of Contents
City of Rohnert Park, Sewer System Management Plan, June 2025 iii
Appendix C: Plan Change Log ................................................................................................. 49
Appendix D: Spill Emergency Response Plan ......................................................................... 50
Appendix E: Spill and Operational Performance Graphs ..................................................... 52
Spill Performance Results ..................................................................................................... 52
Operational Performance Results .......................................................................................... 55
Table of Tables
City of Rohnert Park, Sewer System Management Plan, June 2025 iv
Table of Tables
Table 1 – 1: Percentage of Service Connections in the City Service Area .............................. 2
Table 1 – 2: Gravity Pipeline Asset Information by Pipe Size ................................................. 4
Table 1 – 3: Gravity Pipeline Asset Information by Pipe Material ......................................... 4
Table 1 – 4: Gravity Pipeline Asset Information by Pipe Age ................................................. 5
Table 1 – 5: Sewer Lift Station Asset Information ................................................................... 5
Table 1 – 6: Pressure Force Main Asset Information ............................................................... 5
Table 1 – 7: Sewer System Siphon Assets .................................................................................. 6
Table 2 – 1: Responsible Officials for Sewer System Management Plan............................. 12
Table 3 – 1: Summary of Legal Authorities ............................................................................ 15
Table of Figures
Figure 1 – 1: City of Rohnert Part Sewer Service Area ........................................................... 3
Figure 2 – 1: Rohnert Park Public Works Organization Chart .............................................. 7
Figure 2 – 2: Chain of Communication for Reporting and Responding to Spills ................ 13
List of Abbreviations and Acronyms
City of Rohnert Park, Sewer System Management Plan, June 2025 v
List of Abbreviations and Acronyms
Acronym Definition
AC Asbestos Cement Pipe
ADWF Average Dry Weather Flow
BMP Best Management Practice
BRE Business Risk Exposure
CCTV Closed Circuit Television
CIP Capital Improvement Plan
City City of Rohnert Park
CIWQS California Integrated Water Quality System
CIP Capital Improvement Program
CMMS Computerized Maintenance Management System
County County of Sonoma
CSMP Sewer Collection System Master Plan
CWEA California Water Environment Association
DS Data Submitter
DWQ State Department of Water Quality
FOG Fats, Oils, Grease
FSE Food Service Establishment
GIS Geographical Information System
GWDR General Waste Discharge Requirements
HDPE High Density Polyethylene
I/I Inflow / Infiltration
LoS Level of Service
LRO Legally Responsible Official
KVA Kilovolt-amperes
KW Kilowatts
MRP Monitoring and Reporting Program
O&M Operation and Maintenance
PDWF Peak Dry Weather Flow
PWWF Peak Wet Weather Flow
List of Abbreviations and Acronyms
City of Rohnert Park, Sewer System Management Plan, June 2025 vi
Acronym Definition
PVC Polyvinyl Chloride Pipe or SDR35
RCP Reinforced Concrete Pipe
RPMC Rohnert Park Municipal Code
RWQCB Regional Water Quality Control Board
SCADA Supervisory Control and Data Acquisition
SERP Spill Emergency Response Plan
SOP Standard Operating Procedure
Spill SSO or Sanitary Sewer Overflow
SSMP Sewer System Management Plan
SSO See Spill
SSU Sonoma State University
State California State University
SWRCB State of California Water Resources Control Board
Unk Unknown
UPC Uniform Plumbing Code
UWMP Urban Water Management Plan
V&A Villalobos & Associates
VCP Vitrified Clay Pipe
VFD Variable Frequency Drive
WDID Waste Discharge Identification Number Rohnert Park 5SSO10016
WDR Waste Discharge requirements for Sanitary Sewer Systems WQ-2022-0103-DWQ
WQMP Water Quality Monitoring Plan
Element 1 – Goals
City of Rohnert Park Sewer System Management Plan, June 2025 1
1.0: Element 1 – Goals
The goal of the Sewer System Management Plan (SSMP) is to provide a plan and schedule to:
(1) properly manage, operate, and maintain all parts of the Enrollee’s sanitary sewer
system(s), (2) reduce and prevent spills, and (3) contain and mitigate spills that do occur.
The Plan must include a narrative Introduction section that discusses the following items:
a. Regulatory Context
b. Sewer System Management Plan Update Schedule
c. Sewer System Asset Overview
1.1: Regulatory Context
This Sewer System Management Plan (Plan) describes the City of Rohnert Park’s (City’s)
wastewater collection system management activities. The purpose of these activities is to:
1. Maintain and improve the condition of the collection system infrastructure,
2. Control infiltration/inflow (I/I) and provide appropriate sewer capacity, and to
3. Minimize the number and impact of sanitary sewer spills that occur.
The State Water Resources Control Board (SWRCB) has previously issued statewide waste
discharge requirements for sanitary sewer systems which include requirements for
development of an SSMP. The State Water Board requirements were outlined in Order No.
2006-0003-DWQ, Statewide General Waste Discharge Requirements for Sanitary Sewer
Systems, dated May 2, 2006 (SWB SSO WDR) and the Monitoring and Reporting Plan
(MRP) WQ 2013-0058-Exec. These two SWRCB requirements were replaced on December 6,
2022, by SWRCB Order WQ 2022-0103-DWQ Statewide Waste Discharge Requirements,
General Order for Sanitary Sewer Systems, which became effective for all enrolled agencies
on June 5, 2023. The City of Rohnert Park is an enrolled agency under the WDR with a
wastewater identification number (WDID) of 1SSO10016.
The reissued WDR for sanitary sewers has been revised and defined new requirements for the
auditing and updating of the enrollees SSMP including the preparation of internal audits of the
SSMP. Audits must be completed, and an Internal Audit Report prepared, covering a three-
year period ending August 2, 2024. The Audit Report must then be completed, certified, and
uploaded to the CIWQS system no later than February 2, 2025. Upon completion of the audit,
the City must update the SSMP along with readoption by the City Council no later than
August 2, 2025.
The next three-year audit period covers the period from August 3, 2024, thru August 2, 2027.
The Internal Audit Report must be completed, certified, and uploaded to CIWQS no later than
February 2, 2028. Thereafter, the internal audits shall be completed every three years on the
same schedule. The first SSMP revision under the reissued WDR shall be publicly considered
Element 1 – Goals
City of Rohnert Park Sewer System Management Plan, June 2025 2
and approved by the City Council and uploaded and LRO certified to CIWQS no later than
August 2, 2025. Thereafter, the updates must be completed every six years from August 2,
2025. Failure by the City in complying with the new audit schedules requires the City to
update the CIWQS system, notify the SWRCB and the RWQCB with a justification for the
failure to conduct the timely audit and a schedule for the completion of the audit. This does
not change the required audit schedules for the future.
1.2: Sewer System Asset Overview
The City of Rohnert Park (City) is located in southern Sonoma County with the cities of Santa
Rosa and Petaluma to the south. As of 2024, The City has a population of approximately
43,821 based on estimates from the California Department of Finance. The City covers
approximately 6.36 square miles with a population density of 6,890 persons per square mile.
Rohnert Park is situated within the Russian River watershed, which covers an area of 1,485
square miles that extends southward to San Pablo Bay. A significant amount of the city is in
the river's flood plain and subject to the 13383 Technical Report order.
The City’s sewer system consists of approximately 1,845 manholes, 322 clean-outs and 95
miles of pipe, ranging from 6 inches to 42 inches in diameter, and 3 sewage lift stations
including 9 miles of pressure force mains. Rohnert Park’s wastewater utility provides 24-hour
collection, treatment, disposal and reuse of domestic, commercial and industrial wastewater
generated by Rohnert Park, portions of unincorporated Sonoma County, and the community of
Penngrove. The City is not responsible for operations, maintenance, repair and replacement of
the sewer service laterals from the property to the City public sewers. Figure 1 – 1 below
provides a map of the sanitary sewer service area. All sewage discharged to city sewer lines
are transported to the City of Santa Rosa Subregional Water Reclamation System for
treatment and disposal. The estimated number of service connections as of February 26, 2025,
in the City service area displayed in the Table 1 – 1 below.
Table 1 – 1: Percentage of Service Connections in the City Service Area
Service Connection Type Number of Service Connections Percent of Total
Residential
Single Family 9,251 91.4%
Multiple Family 347 3.4%
Mobile Home 7 0.001%
Commercial 524 5.2%
Total 10,123 100.0%
Element 1 – Goals
City of Rohnert Park Sewer System Management Plan, June 2025 3
Figure 1 – 1: City of Rohnert Part Sewer Service Area
The following tables provide information on the sewer program assets under management by
the City’s Department of Public Works Staff.
Element 1 – Goals
City of Rohnert Park Sewer System Management Plan, June 2025 4
Table 1 – 2: Gravity Pipeline Asset Information by Pipe Size
Diameter, inches Number of Line
Segments
Pipe Length,
linear feet
Portion of Sewer
System, %
6 1079 248,489 49.10%
8 705 159,673 31.55%
10 100 20,219 4.00%
12 60 12,895 2.55%
14 9 2,464 0.49%
15 47 10,902 2.15%
16 13 3,319 0.66%
18 73 18,129 3.58%
21 28 8,818 1.74%
24 43 11,010 2.18%
27 8 2,711 0.50%
30 7 1,886 0.37%
42 34 5,603 1.10
Total 506,083
Total Miles 95.85
Table 1 – 3: Gravity Pipeline Asset Information by Pipe Material
Material Number of
Line Segments Pipe Length, LF Percent of Sewer
System
AC 1080 25,4954 50.38%
HDPE 3 524 0.10%
PVC 775 16,8025 33.20%
RCP 34 6,053 1.20%
VCP 39 1,0481 2.07%
Unknown 263 6,6044 13.05%
Total, Linear Feet 2,194 506,083 100.00%
Total, miles 95.85
Element 1 – Goals
City of Rohnert Park Sewer System Management Plan, June 2025 5
Table 1 – 4: Gravity Pipeline Asset Information by Pipe Age
Age, Years Construction Period Percent of System Linear Feet of Main
0-15 2000 – Current 15.83% 80,098
16 – 35 1980 – 1999 12.45% 62,988
36 – 55 1960 – 1979 53.98% 273,162
56 – 75 1940 – 1959 17.75% 89,833
76 – 95 1920 – 1939 15.83% 80,098
95 – 115 1900 – 1119 0 0
>115 Before 1900 0 0
Unknown Unknown 0 0
Total, linear feet 100.00 506,083
Total Miles 95.85
Table 1 – 5: Sewer Lift Station Asset Information
Pump Station
Name Location
Construction
or Upgrade
Date
No.
Pumps
Pump
Capacity
gpm
Pump
Manufacturer
Pump
HP
Standby
Generation
KW
Lift Station 1
201 J.
Rodgers
Lane
1957 4 250
Lift Station 2
201 J.
Rodgers
Lane
1992 3 600
Lift Station 3 8661 Camino
Colegio 2008 2 Flygt 30 60
Table 1 – 6: Pressure Force Main Asset Information
Lift Station Name Construction or
Upgrade Date
Length
Linear Feet
Size
Inches Material
Pump Station 1 2003 21,120 30" AC
Pump Station 2 1992 21,120 27" HDPE
Pump Station 3 – pipe 1 2003-2007 10,560 10" SDR35
Pump Station 3 – pipe 2 2016 10,560 8” PVC
Total Pressure Mains, linear feet 63,360
Total Pressure mains, Miles 12.0
Element 1 – Goals
City of Rohnert Park Sewer System Management Plan, June 2025 6
Table 1 – 7: Sewer System Siphon Assets
Siphon Location Construction
Date
Length
Linear Feet
Size
Inches Pipe Material
Hillview @ Coleman 1979 217.4 8 Unk
State Farm @ Hinebaugh 1979 146.4 8 Unk
Country Club @ Copeland 1967 230 10 ACP or VC
Liman 1972 33 8 ACP or VC
Evonne @ Five Creeks 1984 147 6 Unk
Redwood @ Hinebaugh 1968 167.4 10 ACP or VC
Commerce @ Hinebaugh 1965 95.0 8 ACP
Lancaster 1972 32.0 8 ACP
Fairview @ Coleman 1977 209.0 14 ACP or ABS
Snyder @ Coleman 1964 325.25 18 Unk
Dawn Ct @ Hinebaugh 1964 211.34 21 Unk
Executive Court 1964 307.77 27 Unk
101 Ramp @ Hinebaugh 1956 358.38 21 VCP
Commerce @ Copeland 1956 325.0 18 Unk
San Mateo @ Hinebaugh 1984 292.78 6 Unk
Lunar Court @ RR 1996 248.03 12 PVC?
Fauna @ Bellvue 1978 394.82 6 ACP or ABS
Total. Linear feet 773.8
Total, miles 0.15
1.3: References
• WDR Attachment D1
Element 2 – Organization
City of Rohnert Park Sewer System Management Plan, June 2025 7
2.0: Element 2 – Organization
The Sewer System Management Plan (Plan) must identify:
a. The name of the Legally Responsible Official as in Section 5.1 of this General Order;
b. The position titles, telephone, and email addresses for management, administrative,
and maintenance positions responsible for implementing specific SSMP Element;
c. Organizational lines of authority; and
d. Chain of communication for reporting spills, from receipt of complaint or other
information, including the person responsible for reporting spills to the State and
Regional Water Board and other agencies as applicable. For example, County Health
Officer, County Health Agency, and State Office of Emergency Services.
2.1: Organization Chart and Contact Information
City staff responsible for implementing the Plan are included on the Public Works Department
organization chart in Figure 2 – 1.
Figure 2 – 1: Rohnert Park Public Works Organization Chart
Element 2 – Organization
City of Rohnert Park Sewer System Management Plan, June 2025 8
2.1.1: Public Works Department
The Department of Public Works is responsible for all of the City's water related functions.
These functions include the City's water, wastewater/sewer, flood control, storm drain and
related engineering services. The objective of combining all water related functions allows for
a more comprehensive and coordinated approach to management of water resources by the
City. The following positions are included within this City department.
Positions responsible for management and implementation of the Plan are discussed below:
• Director of Public Works (LRO) – Under administrative direction, plans, organizes,
manages, and provides administrative direction and oversight for all functions and
activities of the Public Works Department; areas of responsibility include public works
and land development engineering, infrastructure operations and maintenance, water
and wastewater utilities, environmental compliance, Capital Improvement Program
(CIP), property management; coordinates assigned activities with other City
departments, officials, outside agencies, and the public; fosters cooperative working
relationships among City departments and with intergovernmental and regulatory
agencies and various public and private groups; provides highly responsible and
complex professional assistance to the City Manager in areas of expertise; and
performs related work as required. Serves as the City Engineer for capital projects and
manual of standards updates, upon possession and maintenance of a Registered
Professional Civil Engineer license in the State of California. Serves as the City Traffic
Engineer. May also serve as the City’s Americans with Disabilities Act Coordinator as
it relates to program accessibility, communications, and architectural barrier removal.
• Operations Manager – Utilities (LRO) – Under general direction, plans, organizes,
directs, and coordinates activities of the Utilities Division within the Public Works
Department; provides managerial oversight of the operation, maintenance and
improvement the City's utility systems including potable water production and
distribution, storm water collection and outfall, wastewater collection, pumping and
outfall, and recycled water distribution and service connections; designated as the
City's Chief Plant Operator by the State of California Water Resources Control Board;
coordinates operations activities with other divisions and departments; participates in
the planning, development and implementation of the operating and capital budgets;
reviews maps and improvement plans, ensures compliance with utility system and
environmental regulations and mandates; provides highly complex staff assistance to
the Director of Public Works and Community Services; and performs related duties, as
assigned.
• Management Analysist II (DS) – Under general direction, performs a wide variety of
professional, administrative and technical analysis in support of assigned
department(s) within the City; performs administrative, budgetary, economic
development, and statistical analysis including coordinating and conducting needs
Element 2 – Organization
City of Rohnert Park Sewer System Management Plan, June 2025 9
analyses, performs research and feasibility studies, and evaluations for assigned
projects and programs including special studies; develops departmental procedures,
methods and systems, implementing and administering projects and programs such as
economic development and public information, and administering contracts and
budgets; maintains administrative and fiscal records; fosters cooperative working
relationships among City departments and acts as liaison with various community,
public, and regulatory agencies; and performs related work as required.
• Collection System Supervisor – Under general direction, performs, plans, schedules,
and assigns the work of wastewater collection systems maintenance staff within the
Public Works Department; supervises, plans, and coordinates the construction,
installation, maintenance, and repair of wastewater collection systems, facilities, and
related appurtenances; administers, monitors, and provides technical input for assigned
maintenance, operations, and related projects and programs; provides responsible
technical assistance to the Public Works Operations Manager – Utilities; performs a
variety of technical and hands-on tasks relative to the assigned functional area; and
performs related duties as assigned.
• GIS Technician – Performs a wide variety of functions that support the ongoing
maintenance and dissemination of data and applications. Under general supervision,
prepares, revises, and maintains a variety of maps and mapping related records,
documents, and reports; creates, revises, manipulates, and maintains spatial database
records in the computer based geographic information systems environment. Works
with various municipal departments; provides spatial analysis under direction; and
explains and interprets maps as requested to ensure that their needs for GIS
Information are met on a day-to-day basis.
• Collection System Operator I/II – Under direct or general supervision, learns to
perform and performs a variety of semi-skilled and skilled activities and functions
related to the operation, maintenance, and repair of the City’s sewer collection
facilities and appurtenances; and performs related work as assigned.
• Senior Management Analyst – Under general direction, plans, organizes, leads and
may supervise staff engaged in complex, sensitive, and detailed analytical work
including quantitative analysis in the areas of accounting, budget, contracts, grant-
writing, financial/fiscal, economic, legislative and administrative policies and
reporting; analyzes practices and procedures and makes recommendations for
organizational, operational, policy, and procedural improvements; conducts needs
analyses, feasibility studies, and program evaluation; develops and reviews council
reports; coordinates assigned activities with other City departments, officials, outside
agencies, and the public; fosters cooperative working relationships among City
departments and with intergovernmental and regulatory agencies and various public
and private groups; performs related work as required.
Element 2 – Organization
City of Rohnert Park Sewer System Management Plan, June 2025 10
• CIP Program Manager – Under general direction, manages, directs, coordinates, and
monitors Public Works programs and related activities; performs a variety of
specialized technical work; supervises development and implementation of the City’s
Capital Improvement Program (CIP); oversees engineering/construction project
management work for capital projects, non-capital projects, and facility upgrades;
ensures that project schedules, cost, and overall quality performance objectives are met
across a diverse range of capital improvement projects; provides professional
assistance and strategy guidance to staff regarding assigned project/programmatic
area(s); fosters cooperative working relationships with state and federal agencies,
business and community groups, and the public; provides responsible and complex
administrative support to the Public Works Director; and performs related duties, as
assigned.
• Environmental and Sustainability Manager – Under general direction, plans,
organizes, directs, and coordinates sustainability and environmental activities city-
wide, including activities related to energy, water, and natural resource conservation,
refuse, fleet, climate action planning and healthy community initiatives; develops
public outreach strategies in support of local and regional energy efficiency and
greenhouse gas reduction efforts; serves as a liaison and leader to promote, provide
direction, and assist residents, community groups, business organizations, internal
departments, and the public in the development and implementation of sustainability
efforts; manages highly complex projects, programs and contracts; provides highly
complex staff assistance to the Director of Public Works and performs related duties,
as assigned.
• Senior Engineer – Under general supervision, plans, organizes, oversees, and reviews
the activities and forecasted operations of utility-related infrastructure within the
Public Works Department, including long- and short-range project planning,
environmental programs/planning and compliance, design, construction, permitting,
right-of-way, and other programs; coordinates divisional activities with other City
departments and outside agencies; attends and reports back to supervisor on regional
technical and policy advisory committees; provides administrative support to the
Director of Public Works; and performs related duties, as assigned.
• Associate Engineer – Under direct or general supervision, performs various
professional field and office engineering work related to the management, financial
budgeting, planning, design, construction, and maintenance of the City’s Capital
Improvement Program (CIP), land development, traffic engineering, public works
infrastructure, and daily departmental operations; provides project management and
administration; confers with developers, contractors, and representatives of other
agencies regarding facility and infrastructure development; administers professional
services and construction contracts; administers Federal and State grant funds
Element 2 – Organization
City of Rohnert Park Sewer System Management Plan, June 2025 11
associated with construction projects; provides professional staff assistance to the
Director of Public Works or CIP Program Manager, other divisions and departments,
and the public in areas of expertise; performs a variety of studies and prepares and
presents staff reports; and performs related duties as assigned.
• Project Manager – Under general direction, manages, directs, coordinates, and
monitors Public Works programs and related activities; performs a variety of
specialized technical work; supervises development and implementation of the City’s
Capital Improvement Program (CIP); oversees engineering/construction project
management work for capital projects, non-capital projects, and facility upgrades;
ensures that project schedules, cost, and overall quality performance objectives are met
across a diverse range of capital improvement projects; provides professional
assistance and strategy guidance to staff regarding assigned project/programmatic
area(s); fosters cooperative working relationships with state and federal agencies,
business and community groups, and the public; provides responsible and complex
administrative support to the Public Works Director; and performs related duties, as
assigned.
• Project Coordinator – Under general supervision, performs contract administration
involving City facilities; supervises, coordinates, and implements assigned projects and
activities; coordinates projects and activities with other City divisions, developers, and
outside agencies from inception through and including final construction; performs
budgetary, fiscal, organizational, and administrative studies; and performs related
duties, as assigned.
• Public Works Inspector – Under general direction, plans, organizes, assigns,
supervises and coordinates the inspection of publicly and privately constructed
improvements in the City. In the Development Services Department, the position
focuses on the inspection of development projects and encroachment in the City’s
right-of-way. In the Public Works Department, the position focuses on the inspection
of projects included in the City’s Capital Improvement Program. Coordinates contract
inspectors and reviews and resolves difficult and complex inspection and conflicts;
provides technical staff assistance and direction; and performs related duties, as
assigned.
• Public Works Inspector I/II – Under direct or general supervision, performs a variety
of duties involved in inspecting the workmanship and materials used in a variety of
public works construction and capital improvement projects of City infrastructure,
such as encroachment, grading, landscaping, traffic control, water quality, and public
safety; ensures conformance with applicable Federal and State laws, codes, ordinances,
plans, specifications, and departmental regulations; and performs related duties as
assigned.
Element 2 – Organization
City of Rohnert Park Sewer System Management Plan, June 2025 12
• Administrative Assistant I/II – Under general supervision, performs a variety of
administrative, secretarial, and office support duties of considerable complexity
requiring thorough knowledge of the department, its procedures, and operational
details; provides administrative support to management, departmental staff,
commissions, and committees; composes and prepares correspondence using
considerable judgment in content and style; performs skilled word processing, data
entry, and typing; provides information to the public and staff; provides assistance for
a wide variety of assignments related to administration of budgets, contracts, research
projects, and department programs; and performs related work as required.
2.2: Responsible and Authorized Representatives
The Director of Public Works is the City’s authorized representative registered with the
California Integrated Water Quality System (CIWQS) to certify spill reports. The Director has
authorized the Operations Manager – Utilities to prepare and submit electronic reports. The
designated Data Submitters are authorized to enter spill data and other WDR required
information into the CIWQS system prior to LRO approval and certification.
Table 2 – 1: Responsible Officials for Sewer System Management Plan
Element Element Name Responsible
Official Phone Email
1 Introduction and Goals Vanessa Garrett (707) 588-2251 vgarrett@rpcity.org
2 Organization Vanessa Garrett (707) 588-2251 vgarrett@rpcity.org
3 Legal Authority Vanessa Garrett (707) 588-2251 vgarrett@rpcity.org
4 O&M Program Mark Hendersen (707) 588-3316 mhendersen@rpcity.org
5 Design and
Performance Provisions
Senior Engineer
Julian De Anda (707) 588-3311 jdeanda@rpcity.org
6 Spill Emergency
Response Plan Mark Hendersen (707) 588-3316 mhendersen@rpcity.org
7 Sewer Pipe Blockage
Control Program
City of Santa Rosa
Martin St. George 707-543-3409 mstgeorge@srcity.org
8
System Evaluation,
Capacity Assurance,
CIP
Senior Engineer
Julian De Anda (707) 588-3311 jdeanda@rpcity.org
9
Monitoring,
Measurement and
Program Modifications
Mark Hendersen (707) 588-3316 mhendersen@rpcity.org
10 Internal Plan Audit Mark Hendersen (707) 588-3316 mhendersen@rpcity.org
11 Communications Mark Hendersen (707) 588-3316 mhendersen@rpcity.org
Appendix
A
Plan Adoption
Documents Vanessa Garrett (707) 588-2251 vgarrett@rpcity.org
Element 2 – Organization
City of Rohnert Park Sewer System Management Plan, June 2025 13
Element Element Name Responsible Official Phone Email
Appendix
B
Plan Internal Audit
Reports Mark Hendersen (707) 588-3316 mhendersen@rpcity.org
Appendix
C Plan Change Log Mark Hendersen (707) 588-3316 mhendersen@rpcity.org
Appendix
D
Spill Emergency
Response Plan Mark Hendersen (707) 588-3316 mhendersen@rpcity.org
Appendix
E
Spill and Operational
Performance Graphs Mark Hendersen (707) 588-3316 mhendersen@rpcity.org
2.3: Chain-of-Communication for Reporting and Responding to Spills
Figure 2 – 2: Chain of Communication for Reporting and Responding to Spills
Element 2 – Organization
City of Rohnert Park Sewer System Management Plan, June 2025 14
2.4: References
• WDR Attachment D2
Element 3 – Legal Authority
City of Rohnert Park Sewer System Management Plan, June 2025 15
3.0: Element 3 – Legal Authority
Each Enrollee must demonstrate, through sanitary sewer system use ordinances, service
agreements, or other legally binding procedures, that it possesses the necessary legal authority
to:
a. Prevent illicit discharges into its sanitary sewer system (examples may include I/I;
unauthorized stormwater, chemical dumping; unauthorized debris; roots, fats, oils, and
grease; and trash, including rags and other debris that may cause blockages);
b. Obtain easement accessibility agreements for locations requiring sewer system
operations and maintenance, as applicable;
c. Require that sewer system components and connections be properly designed and
constructed;
d. Ensure access for maintenance, inspection, and/or repairs for portions of the service
lateral owned or maintained by the Enrollee;
e. Enforce any violation of its sewer ordinances, services agreements, or other legally
binding procedures; and
f. Obtain easement accessibility agreements for locations requiring sewer system
operations and maintenance, as applicable.
The City’s legal authority to prevent illicit discharges into the collection system require proper
design and construction of sewers and connections, and require proper installation, testing,
and inspection of sewers is provided by the City’s Municipal Code, Title 13. The specific
sections applicable to the requirements of the Sewer System Management Plan (Plan) are
outlined below.
Table 3 – 1: Summary of Legal Authorities
Legal Authority Issue Rohnert Park Municipal
Code Reference
Prevent illicit discharges into the wastewater collection system. 13.16.040
13.36.020
Limit the discharge of fats, oils, and grease and other debris that may
cause blockages. 13.36.020.B
Require that sewers and connections be properly designed and
constructed. 13.08 to 13.52
Clearly define City responsibility. 13.26
Ensure access for maintenance, inspection, or repairs for portions of
the service lateral owned or maintained by the City.
13.26 et seq.
13.48.320
Element 3 – Legal Authority
City of Rohnert Park Sewer System Management Plan, June 2025 16
Legal Authority Issue Rohnert Park Municipal
Code Reference
Control infiltration and inflow (I/I) from private service laterals. 13.16.030
13.36.020(18)
Requirements to install grease removal devices (such as traps or
interceptors), design standards for the grease removal devices,
maintenance requirements, BMP requirements, record keeping and
reporting requirements.
13.48.30 0
Authority to inspect grease producing facilities. 13.18.20
Enforce any violation of its sewer ordinances. 13.52
3.1: Agreements
The City has agreements with the Regents of the California State University (State), Sonoma
County (County) to serve three satellite collection systems: Sonoma State University (SSU),
Canon Manor West, and Federated Indians of Graton Rancheria.
3.1.1: Sonoma State University
The City first signed an agreement with the State to serve Sonoma State University with
sanitation facilities and sewage treatment and disposal in 1964. The agreement was most
recently updated in 1980. Under this agreement, the City accepts sewage collected at SSU for
treatment but does not provide design, operations, or maintenance of sanitation facilities on
SSU property. The 1980 agreement states that the State agrees to collect and convey sewage
to the City in such a manner as to comply with all applicable laws, rules, and regulations
(Section 6, Page 5). The 1980 agreement also includes specific limitations and prohibitions to
minimize infiltration and inflow (I&I) including:
• Identification and abatement of inflow from storm and surface waters, land and roof
drainage, and cooling water (Section 8, Page 5);
• Proper design, construction, and testing of new sewer (Section 8, Page 5); and
• Utilizing at least 5 percent of the annual Operations and Maintenance identification
and elimination of I/I (Section 8, Page 6).
The agreement also includes an affirmation that all sewage discharged from SSU will meet
City requirements for quality, characteristics, and prohibited substances contained in the
City’s Sanitary Code (including FOG) and applicable regulations (Section 8, Page 6).
3.1.2: Canon Manor West
The City signed an agreement with the County to serve Canon Manor West in 2001. Canon
Manor West is an unincorporated area of the County located adjacent to the City’s eastern
boundary and within the City’s sphere of influence. The agreement allows the City to apply
service rules, regulations, and standards for the Canon Manor West wastewater system
Element 3 – Legal Authority
City of Rohnert Park Sewer System Management Plan, June 2025 17
(Section 8, Page 5) reviews construction plans, operates and maintains the wastewater
collection system, and accepts sewage collected at Canon Manor West for treatment.
3.1.3: Federated Indians of Graton Rancheria
The City signed an agreement with the Federated Indians of Graton Rancheria in 2012. The
Graton Rancheria is an unincorporated area of the County located adjacent to the City’s
western boundary and within the City’s sphere of influence. Under this agreement, the Graton
Rancheria constructed the facilities to City standards and is responsible for the maintenance of
the wastewater collection system on their property. The City accepts sewage collected at
Graton Rancheria that is pumped through a City owned and maintained force main to the
City’s pumping facility located at 201 J. Rogers Lane.
3.2: References
• WDR Attachment D3
• City of Rohnert Park Municipal Code Chapter 13 -
https://library.municode.com/ca/rohnert_park/codes/code_of_ordinances?nodeId=TIT1
3WASE
• Agreement with the State of California (Sewer Service for Sanoma State University
• Agreement with the County of Sonoma to Provide Public Westwater Services to the
Canon Manor West Area
• Joint Exercise of Powers Agreement for Wastewater Services with the Federated
Indians of Graton Rancheria
Element 4 – Operations and Maintenance Program
City of Rohnert Park Sewer System Management Plan, June 2025 18
4.0: Element 4 – Operations and Maintenance Program
The Sewer System Management Plan (Plan) must include the items listed below that are
appropriate and applicable to the Enrollee’s system:
a. Updated map of the sanitary sewer system
b. Preventative Operations and Maintenance
c. Training
d. Equipment Inventory
4.1: Collection System Map
The City has paper-based maps of its sewer system. The paper-based maps are produced from
a master base map first drafted from 1:300 photographs in 1975. The master base map has
been updated numerous times, most recently in 2024.
The City has an ArcGIS Geographical Information System (GIS) database of their sewer
system facilities to generate sewer maps. The maps include gravity sewers (including pipe
diameter), the direction of sewage flow, manholes, cleanouts, pump stations, force mains,
streets names, and right-of-way’s. Field staff are responsible for marking up paper maps or
computerized maintenance management system (CMMS) indicating discrepancies or errors
identified through field verification. Field supervisors review discrepancies and errors
identified and transmit requested changes to the GIS staff.
The City’s engineering department is responsible for updating GIS maps as facilities are
added, rehabilitated, and as corrections are identified through field work. High priority
changes (changes that could result in a spill) will be incorporated into the GIS within 60 days.
Low priority changes will be incorporated into the GIS on an annual basis. Sewer system map
sheets for field use will be printed and distributed to the field crews as they are updated.
The City GIS database also contains the same asset information for the City storm water
conveyance system and other storm water conveyance facilities in the service area. All
sanitary and storm asset information is available to City staff in the field during operations
activities and spill emergency events.
4.2: Preventive Maintenance Program
4.2.1: Prioritized Preventive Maintenance
4.2.1.1: Gravity Sewers
The City performs preventive cleaning of its gravity sewers. The City has a goal of cleaning or
inspecting gravity sewer lines 12 inches or smaller every six years. Problem sewer line
segments are cleaned monthly, quarterly, semi-annually, or annually. Problem sewer lines can
be identified during routine cleanings, manhole inspections, and from customer calls. The
frequency of line cleaning is subject to increase or decrease on a case-by-case basis,
Element 4 – Operations and Maintenance Program
City of Rohnert Park Sewer System Management Plan, June 2025 19
dependent on the field crew’s feedback from observations during cleaning. Lines 15 inches or
smaller in diameter (representing 93% of the total system length) can be cleaned by the City
using its high velocity combination cleaner. Lines greater than 15 inches in diameter
(representing 7% of the total system length) are inspected by the City (using visual or CCTV
inspection methods) and they will be cleaned by contractors if needed. Cleaning of gravity
sewers is tracked in the field on paper log sheets or in Mobile MMS.
4.2.1.2: Manholes
Currently, minor repairs on manholes are performed at the time of detailed manhole
inspection. Major repair issues are noted and added to a list to be fixed at a future date.
Manhole inspection records are tracked in the field on paper log sheets or CMMS. City
cleaning crews document the existence of manhole maintenance defects (e.g., roots, grease,
debris) found during sewer cleaning activities and identify whether an additional condition
assessment inspection needs to be performed (e.g., structural defects). Through this process,
every manhole in the system will be inspected by either a cleaning crew, manhole inspection
crew, or both in a six year-year cycle in conjunction with the system-wide sewer cleaning
program. The manhole condition assessment inspections focus on recording the severity of
manhole issues in a code-based format. Manhole inspection records are compiled, and all
repairs are prioritized based on severity.
4.2.1.3: Force Mains
The City has two major force mains that connect the City’s collection system to the Santa
Rosa Subregional System. Air relief valves are inspected and maintained bi-monthly. Force
mains are cleaned when conditions are warranted. The City’s newer force main conveying the
City’s flows to the Santa Rosa Subregional System is equipped with a pig launcher to allow
for cleaning. Cleaning and inspection of the City’s older force main conveying the City’s
flows to the Santa Rosa Subregional Treatment Plant is conducted every two to four years, or
as conditions warrant. Force main maintenance is currently recorded on paper log sheets that
are stored at the pump stations.
4.2.1.4: Pump Stations
The City performs daily inspections of Pump Station No. 1, Pump Station No. 2, and Pump
Station No. 3 (pump stations at the two major force mains that connect the City’s system to
the Santa Rosa Subregional System). Between inspections, the City monitors pump station
performance using a Supervisory Control and Data Acquisition (SCADA) system, which
sends notification of pump station alarms to the Public Safety Dispatch Center (see Element
2). Pump station maintenance is completed as needed based on the inspections. Pump station
maintenance activities include preventive and corrective maintenance activities. Pump station
maintenance is currently recorded on paper log sheets that are stored at the pump stations later
inserted to Mobile MMS.
Element 4 – Operations and Maintenance Program
City of Rohnert Park Sewer System Management Plan, June 2025 20
4.2.2: Non-Routine Maintenance
Non-routine maintenance activities include investigation and response to any complaints
regarding an overflowing manhole, missing, loose, or noisy manhole covers, private
residential plumbing issues, pump station malfunctions, sewer odor complaints, etc.
Non-routine maintenance activities are recorded in the service request system Mobile MMS or
in hard copy files.
4.2.3: Preventive Maintenance Scheduling and Tracking
The City maintains a database which contains information about each pipe segment and
manhole in the collection system. Pipe segment information includes pipe identification
number, diameter, length, material, basin number, street name and block number (e.g., 5400
block of Holly St.). Manhole information includes manhole number, rim and invert elevations,
X-Y coordinates, and nearest street address (e.g., 5420 Holly St.). Cleaning frequency and
manhole inspection information are recorded Mobile MMS. The database also contains links
to As-Built drawings for each pipeline segment and manhole. The City uses Mobile MMS to
schedule line cleaning.
Mobile MMS will be used for gravity sewer, manhole, pump station, and force main
maintenance activities. The City has also purchased iPads which are available in vehicles in
the field for staff to directly input operational information directly into Mobile MMS.
4.2.4: Corrective Maintenance/Point Repairs
System defects, as identified, are documented and prioritized in the City’s computerized
maintenance management system (Mobile MMS). Based on project size and complexity, City
staff and/or private contractors are issued work orders to repair/replace the identified
deficiency. Where short sections of pipe have been identified as defective, City staff may
rehabilitate the pipe to near new conditions. The City staff also makes infrequent repairs
found in the system from condition assessment of cleaning results.
4.2.5: Root Control
Monthly, City staff conducts root cutting or root foaming that is identified from the cleaning
operation or in areas previously identified with root problems.
4.2.6: SMART Covers
The City sewer system includes the use of fourteen (14) SMART covers placed strategically
in the system to provide early warning of potential spills. These assets report directly to the
cloud based system and also report to city designated sewer staff phones. The smart covers
communicate directly 24 hours per day/365 days per year.
4.2.7: Manhole Inspections
Inspections conducted for manholes involve a visual assessment of the overall manhole
condition and observed deficiencies that could result in I&I. As part of the focused and cyclic
Element 4 – Operations and Maintenance Program
City of Rohnert Park Sewer System Management Plan, June 2025 21
cleaning programs, City maintenance staff visually-inspect manholes for corrosion, debris or
damage around the base, cracks or holes, and condition of manhole steps.
Detailed investigations of manhole condition follows at a time when a connecting line
segment is defined as a rehab project, and corrections needed to the manhole structure are then
included as part of the project work. Improvements to manhole inspections and the manhole
inspection program will be further evaluated and revised to prioritize the asset classes.
4.2.8: Lift Station Inspections
Lift stations are inspected on a daily basis. Daily inspections include visual check of the
equipment, manual cycling of pumps, checking and cleaning floats, recording hour meter
readings, and cleaning off debris.
Lift stations are inspected every year including thorough inspection and maintenance of
pumps. Wet wells are dewatered and cleaned as needed. In addition, lift stations are also
inspected and assessed during master planning efforts.
4.2.9: Lift Station Force Mains and Siphon
The City visually inspects force main above ground alignments and discharge manhole
assessments only. The City will develop a prioritized pressure pipe and siphon condition
assessment program in the next two years. These programs will be prioritized for the pressure
pipeline and siphon assets within the 1000-foot of waters of the State.
4.3: Training
Employees of the Public Works Department, which includes wastewater collection, are
continually encouraged to acquire, renew, and increase their California Water Environment
Association (CWEA) Operation and Maintenance of Wastewater Collection Systems
certifications.
4.3.1: The CWEA Certification of Competency Standard
The basic standard of CWEA certification is that certificate holders have, and continue to
perform at, a level of basic competence that enables them to perform the essential duties of the
job safely, effectively, without close supervision, and without further training.
The standard is determined by the following factors:
• Meeting minimum experience and education requirements.
• Passing the appropriate written examination.
• Demonstrating continuing competence through education, training, and/or re-testing.
• Continuing to perform the Essential Duties at, or above, the minimal level of
competency described by the basic standard of CWEA certification (see above
paragraph).
Element 4 – Operations and Maintenance Program
City of Rohnert Park Sewer System Management Plan, June 2025 22
The Public Works Department regularly, based upon its size and complexity of the sewer
system, conducts regular training of its personnel on the WDR requirements, the Sewer
System Management Plan, the City Spill Emergency Response Plan, and spill volume
estimation techniques. In addition, separate training on the SWRCB CIWQS system will be
regularly conducted for all LROs and DSs.
4.4: Contingency Equipment and Replacement Inventories
The City of Rohnert Park has the following equipment available for emergency operations and
collection system maintenance.
All of the City’s lift stations incorporate a two-pump design at a minimum, to provide for
seamless operation in the event of a pump failure. Most of the lift stations are part of a
SCADA network and all have remote alarm capability.
The City’s Critical Equipment is listed in Supplemental Table 4-1 below. The City’s
inventory of critical replacement and spare parts are tracked monthly on the City’s CMMS to
ensure effective maintenance of the sewer system. The City stocks an assortment of materials
including pipes, couplings, main line plugs, and submersible pumps.
4.5: References
• WDR Attachment D4
Element 4 – Operations and Maintenance Program
City of Rohnert Park Sewer System Management Plan, June 2025 23
Supplemental Tables
4.6: Supplemental Table 4-1: Contingency Equipment
Description Location
Vac-Con truck: Combination truck, dual axle Main Pump Station
Harben truck: Jetter cleaner with high pressure steam cleaner
(single axle) Main Pump Station
3 in. trash pump (2) with suction hose and discharge hose 400
ft. each Main Pump Station
4 in. trash pump with suction hose and 400 ft. discharge hose Main Pump Station
Crane trailer Main Pump Station
Utility trucks (5) Main Pump Station
Confined space equipment Main Pump Station
Forklift Main Pump Station
225 KVA trailer mounted generator Main Pump Station
Spare VFD pump station #1 Main Pump Station
Spare VFD pump station #3 Main Pump Station
Spare grinder Main Pump Station
Caterpillar 250 KW generator pump station #1 Main Pump Station
Onan 900 KW generator pump station #2 Main Pump Station
Kohler 50 KW generator pump station #3 Main Pump Station
Spare pump station controller – multi smart Main Pump Station
Backhoe Main Pump Station
6 in. Bypass Pump Main Pump Station
Element 5 – Design and Construction Standards
City of Rohnert Park Sewer System Management Plan, June 2025 24
5.0: Element 5 – Design and Construction Standards
The SSMP must include the following items as appropriate and applicable to the Enrollee’s
system:
a. Updated design criteria, and construction standards and specifications, for the
construction, installation, repair, and rehabilitation of existing and proposed system
infrastructure components, including but not limited to pipelines, pump stations, and
other system appurtenances.
b. Procedures and standards for the inspection and testing of newly constructed, newly
installed, repaired, and rehabilitated system pipelines, pumps, and other equipment and
appurtenances.
5.1: Standards for Installation, Rehabilitation, and Repair
The City’s 2023 Manual of Standards, Details and Specifications are available to contractors
on the City Standards portion of the City’s website. Sewer Design Standards are included in
Volume 1 of the manual. Conformance to the City Standards are required, and the criteria are
considered a minimum.
5.2: Standards for Inspection and Testing of New Facilities
Standards for the construction and testing of sewers is included in the 2023 Manual of
Standards, Details and Specifications Volume 3, Section 71-1/09 – Testing of Sewers.
5.3: References
• WDR Attachment D9
• 2023 Manual of Standards, Details and Specifications -
https://www.rpcity.org/city_hall/departments/development_services/engineering/manu
al_of_standards
Element 6 – Spill Emergency Response Plan
City of Rohnert Park Sewer System Management Plan, June 2025 25
6.0: Element 6 – Spill Emergency Response Plan
The SSMP must include an up-to-date Spill Emergency Response Plan to ensure prompt
detection and response to spills to reduce spill volumes and collect information for prevention
of future spills. The Spill Emergency Response Plan must include procedures to:
a. Notify primary responders, appropriate local officials, and appropriate regulatory
agencies of a spill in a timely manner;
b. Notify other potentially affected entities (for example, health agencies, water suppliers,
etc.) of spills that potentially affect public health or reach waters of the State;
c. Comply with the notification, monitoring and reporting requirements of this General
Order, State law and regulations, and applicable Regional Water Board Orders;
d. Ensure that appropriate staff and contractors implement the Spill Emergency Response
Plan and are appropriately trained;
e. Address emergency system operations, traffic control and other necessary response
activities;
f. Contain a spill and prevent/minimize discharge to waters of the State or any drainage
conveyance system;
g. Minimize and remediate public health impacts and adverse impacts on beneficial uses
of waters of the State;
h. Remove sewage from the drainage conveyance system;
i. Clean the spill area and drainage conveyance system in a manner that does not
inadvertently impact beneficial uses in the receiving waters;
j. Implement technologies, practices, equipment, and interagency coordination to
expedite spill containment and recovery;
k. Implement pre-planned coordination and collaboration with storm drain agencies and
other utility agencies/departments prior, during, and after a spill event;
l. Conduct post-spill assessments of spill response activities;
m. Document and report spill events as required in this General Order; and
n. Annually, review and assess effectiveness of the Spill Emergency Response Plan, and
update the Plan as needed.
6.1: Existing Documentation
The City, pursuant to the reissued WDR, completed and updated the original Overflow
Emergency Response Plan to a Spill Emergency Response Plan (SERP). The SERP includes
Element 6 – Spill Emergency Response Plan
City of Rohnert Park Sewer System Management Plan, June 2025 26
all new requirements and the revised sampling and testing requirements formally contained in
the City Water Quality Monitoring Plan (WQMP).
6.2: Purpose
The purpose of the City of Rohnert Park Spill Emergency Response Plan (SERP) is to support
a prompt, orderly and effective response to spills (sanitary), reduce spill volumes, and collect
information for prevention of future spills. A “spill” in this document is defined, by State
Water Board Order No. WQ 2022-0103-DWQ as a discharge of sewage from any portion of a
sanitary sewer system due to a sanitary sewer system overflow, operational failure, and/or
infrastructure failure.
The SERP provides guidelines for City personnel to follow in responding to, cleaning up,
reporting, and properly documenting spills that may occur within the City’s service area. This
SERP satisfies the State Water Board Order No. WQ 2022-0103-DWQ, which require
wastewater collection agencies to have a SERP.
Additionally, the SERP outlines procedures for responding to sanitary sewer backups into
structures as required by the City’s insurer. See definitions. “Backup” is a term typically used
by insurers to describe property damage resulting from exposure and contact to untreated or
partially treated sewage.
6.3: Training
6.3.1: Initial and Annual Refresher Training
All City personnel who may have a role in responding to, reporting, and/or mitigating a sewer
system spill will receive training on the contents of this SERP. All new employees will
receive training before they are placed in a position where they may have to respond. Current
employees will receive annual refresher training on this SERP and the procedures to be
followed. The City will document all training.
Affected employees will receive annual training on the following topics by knowledgeable
trainers:
• The requirements of State Water Board Order No. WQ 2022-0103-DWQ (WDR),
Element 6.
• The City’s Spill Emergency Response Plan procedures and practice drills.
• Containment and cleanup methods.
• Researching and documenting Sanitary Sewer Spill Start Times.
• Skilled estimation of spill volume for field operators.
• Electronic CIWQS reporting procedures for staff submitting data.
• State Water Resources Control Board Employee Knowledge Expectations.
Element 6 – Spill Emergency Response Plan
City of Rohnert Park Sewer System Management Plan, June 2025 27
• Water quality sampling and testing procedures and recordkeeping (See Spill Workbook
Section 9.2).
Through SWRCB Employee Knowledge Expectations training, the employee will be able to
answer the following:
1. Please briefly describe your name and job title.
2. Please describe for us approximately when you started in this field and how long you
have worked for your agency.
3. Please expand on your current position duties and role in responding in the field to any
spill complaints.
4. Please describe your SOPs used to respond/mitigate spills when they occur.
5. Describe any training your agency provides or sends you to for conducting spill
volume estimates.
6. We are interested in learning more about how your historical spill response activities
have worked in the field. We understand from discussions with management earlier
that you use the SERP from the SSMP. Please elaborate on how you implement and
utilize the procedures in the plan.
7. Historically, before any recent changes, can you please walk us through how you
would typically receive and respond to any spill complaints in the field?
8. Can you tell us who is responsible for estimating spill volumes discharged? If it is you,
please describe how you go about estimating the spill volume that you record on the
work order/service request forms?
9. What other information do you collect or record other than what is written on the work
order form?
10. Describe if and when you ever talk with people that call in spills (either onsite or via
telephone) to further check out when the spill might have occurred based on what they
or others know? If you do this, can you tell us where this information is recorded?
11. We understand you may be instructed to take pictures of some sewer spills/backups
into structures. Other than these spills, when else would you typically take any pictures
of a spill?
12. Please walk us through anything else you would like to add to help us better
understand how your field crews respond and mitigate spill complaints.
6.3.2: Spill Response Drills
Periodic training drills or field exercises will be held to ensure that employees are up-to-date
on these procedures, equipment is in working order, and the required materials are readily
available. The training drills will cover scenarios typically observed during sewer related
Element 6 – Spill Emergency Response Plan
City of Rohnert Park Sewer System Management Plan, June 2025 28
emergencies (e.g., mainline blockage, mainline failure, and lateral blockage). The results and
the observations during the drills will be recorded and action items will be tracked to ensure
completion.
6.3.3: Spill Training Record Keeping
Records will be kept of all training that is provided in support of this SERP for 5 years. The
records for all scheduled training courses and for each overflow emergency response training
event will include date, time, place, content, name of trainer(s), names and titles of attendees,
brief narrative description of the training, including training method(s) and training materials
and/or equipment used.
6.4: Policy
The City’s employees are required to report all spills from agency owned sewer mains and
publicly owned laterals found and to take the appropriate action to secure the spill area,
properly report to the appropriate regulatory agencies, relieve the cause of the spill, and ensure
that the affected area is cleaned as soon as possible to minimize health hazards to the public
and protect the environment. The City’s goal is to respond to sewer system spills as soon as
possible following notification. The City will follow reporting procedures regarding sewer
spills as set forth by the North Coast Regional Water Quality Control Board (RWQCB) and
the State Water Board Order No. WQ 2022-0103-DWQ (SSSWDR).
The full Spill Emergency Response Plan document is included in the Appendix D and
includes a Sewer Spill/Backup Response Workbook that contains all documents used to
properly document the City response activities to all spill events.
6.5: References
• WDR Attachment D6
• Spill Emergency Response Plan
Element 7 – Sewer Pipe Blockage Control Program
City of Rohnert Park Sewer System Management Plan, June 2025 29
7.0: Element 7 – Sewer Pipe Blockage Control Program
The Sewer System Management Plan must include procedures for the evaluation of the
Enrollee’s service area to determine whether a sewer pipe blockage control program is needed
to control fats, oils, grease, rags, and debris. If the Enrollee determines that a program is not
needed, the Enrollee shall provide justification in its Plan for why a program is not needed.
The procedures must include, at minimum:
a. An implementation plan and schedule for a public education and outreach program that
promotes proper disposal of pipe-blocking substances;
b. A plan and schedule for the disposal of pipe-blocking substances generated within the
sanitary sewer system service area. This may include a list of acceptable disposal
facilities and/or additional facilities needed to adequately dispose of substances
generated within a sanitary sewer system service area;
c. The legal authority to prohibit discharges to the system and identify measures to
prevent spills and blockages;
d. Requirements to install grease removal devices (such as traps or interceptors), design
standards for the removal devices, maintenance requirements, best management
practices requirements, recordkeeping, and reporting requirements;
e. Authority to inspect grease producing facilities, enforcement authorities, and whether
the Enrollee has sufficient staff to inspect and enforce the fats, oils, and grease
ordinance;
f. An identification of sanitary sewer system sections subject to fats, oils, and grease
blockages and establishment of a cleaning schedule for each section; and
g. Implementation of source control measures for all sources of fats, oils, and grease
reaching the sanitary sewer system for each section identified above.
7.1: FOG Source Control Program
The City and City of Santa Rosa (Santa Rosa) have signed an Inspection Services Agreement
(City Council Resolution No. 91-146, authorized in 1991) that Santa Rosa will provide
Commercial/Industrial Inspection Services including notification to users of non-compliance,
issuing and renewing discharge permits, interviews, sampling and monitoring, reporting,
record keeping, and related services. Under this agreement, the City of Santa Rosa provides
the FOG Source Control Program in the City’s service area. The program is focused on the
City’s ninety-four (94) food service establishments (FSE) and includes plan review and
specification of grease removal equipment (based on Uniform Plumbing Code, (UPC) sizing
criteria), permitting, compliance inspections, and enforcement. Santa Rosa requires food
service establishments to employ Best Management Practices.
Element 7 – Sewer Pipe Blockage Control Program
City of Rohnert Park Sewer System Management Plan, June 2025 30
7.2: Public Education and Outreach Program
Rohnert Park relies on the City of Santa Rose for public education and outreach for residential
and commercial dischargers. The FOG Source Control Program objectives include:
• Reducing the amount of FOG entering the Regional System.
• Protecting public health and the environment by reducing FOG related sanitary sewer
overflows.
• Eliminating storm water pollution associated with non-permitted outdoor food service
establishment activities such as washing kitchen mats and restaurant equipment and
other maintenance activities in outdoor areas to avoid discharges to storm drains.
• Continuing to comply with all applicable federal, state, and local regulatory
requirements and fulfilling other goals and objectives to prevent sanitary sewer
overflows due to FOG from food establishments).
Grease scrapers, cutting mats, and can lids serve as a reminder for residential users to pour
their used cooking oil into a can instead of down the drain. Grease scrapers have continued to
be provided upon request to all food service facilities within the Regional service area and
when a new Food Service Permit is issued. Santa Rosa also attends public events in the
County and provides scrapers and outreach materials to the public at multiple events. Sonoma
County also participates in the Bay Area Pollution Prevention Group which also utilizes
several strategies for protecting water of the State for sewage spills.
7.3: Plan and Schedule for Disposal of Pipe-Blocking Substances
The City of Santa Rosa accepts waste streams at the Laguna Treatment Plant such as FOG and
liquid food processing wastes by permit only. Santa Rosa also has several websites
(https://www.srcity.org/1233/Sewerman) available for the public and commercial dischargers
for the discharge to sewer lines.
Local grease haulers can dispose of grease at a variety of regional locations including
wastewater treatment plants (e.g., East Bay Municipal Utility District Treatment Facility in
Oakland, Laguna Treatment Plant in Santa Rosa) and rendering facilities (e.g., Ukiah, South
San Francisco, Sacramento, Chico). Sonoma County provides disposal of other materials that
should not be discharged to the sewer system. They have developed outreach materials and a
“Zero Waste Guide” that provides broad coverage for the disposal of materials that should not
be placed in sewers.
7.4: Legal Authority
The City has the legal authority to prohibit discharges of FOG to the wastewater collection
system. See Element 3 Legal Authority for additional discussion of the City’s legal authority
relating to FOG control. The City by agreement utilizes the City of Santa Rosa for all FOG
related activities and enforcements. Requirements to Install Grease Removal Devices Section
Element 7 – Sewer Pipe Blockage Control Program
City of Rohnert Park Sewer System Management Plan, June 2025 31
13.48.300 of the City’s Municipal Code requires the installation of a grease interceptor, when
necessary, as decided by the City Engineer. Santa Rosa, who issues the Non-Residential Food
Service Discharge Permits in the City’s service area as part of the Source Control program,
has an Interceptor Policy that specifies the requirements for interceptor sizing. The Santa Rosa
Discharge Permit specifies the maintenance, record keeping, and reporting requirements the
permit holder has to meet relative to their grease removal device.
7.5: Authority to Inspect and Regulate Grease Producing Facilities
The Inspection Services Agreement and the City’s Sanitary Code provide Santa Rosa’s
inspectors with the right of entry onto properties in Rohnert Park. The Inspection Services
Agreement establishes that Santa Rosa shall refer dischargers who are in violation of the
Rohnert Park Sanitary Code to the Sonoma County District Attorney for prosecution. Prior to
prosecution, Santa Rosa and the City work collectively to bring the discharger into
compliance. Santa Rosa, working with City staff, will 1) provide a verbal warning of
violation, 2) send a Notice of Violation to the discharger, 3) hold an administrative hearing
with the Discharger, and 4) send an Order to Cease and Desist Sewer Discharge contingent
upon installation of a grease interceptor. If a Discharger does not comply after all four of these
actions have been tried, prosecution can be sought against the Discharger.
7.6: Identification of Grease Problem Areas and Sewer Cleaning
Sewer lines with excessive grease are identified during routine cleaning, from customer calls,
or during manhole inspections. When a line is identified as having a grease-related problem, it
is put on a monthly, quarterly, or annual sewer cleaning cycle as appropriate to manage grease
buildup.
7.7: Implementation of Source Control Measures
The City’s source control program has been contracted with the City of Santa Rose. The City
relies on Santa Rosa for the implementation of all source control measures discharges
reaching the City sewer system. The City does provide information to Santa Rosa from the
cleaning program when significant FOG issues are identified.
7.8: References
• WDR Attachment D7
• City of Santa Rosa, Interceptor Policy, August 1, 1991
• The City and City of Santa Rosa (Santa Rosa) have signed a Commercial/Industrial
Inspection Services Agreement (City Council Resolution No. 91-146, authorized in
1991
• Rohnert Park Municipal Code Title 13 -
https://library.municode.com/ca/rohnert_park/codes/code_of_ordinances?nodeId=TIT1
3WASE
Element 7 – Sewer Pipe Blockage Control Program
City of Rohnert Park Sewer System Management Plan, June 2025 32
• Uniform Plumbing Code
• Bay Area Pollution Prevention Group - https://bacwa.org/bappg-fog/
Element 8 – System Evaluation and Capacity Assurance Plan
City of Rohnert Park Sewer System Management Plan, June 2025 33
8.0: Element 8 – System Evaluation and Capacity Assurance
Plan
The SSMP must include procedures and activities for:
a. Routine evaluation and assessment of system conditions;
b. Capacity assessment and design criteria;
c. Prioritization of corrective actions; and
d. A capital improvement plan.
8.1: Routine Evaluation and Assessment of System Conditions
8.1.1: Scheduled Pipeline Condition Assessment
The City has performed periodic Closed-Circuit Television (CCTV) inspections over the past
several years on gravity sewer lines as part of Infiltration and Inflow (I/I) investigations (see
Section 8.1.3. in Element 8). The City has an ongoing I/I reduction program as part of an
overall regional effort for the Santa Rosa Subregional Wastewater Reclamation System. In
addition to flow monitoring, flow analysis, and modeling, described above, the City has
conducted I/I source detection field work, including manhole inspections and closed-circuit
television (CCTV) inspection, to identify specific sources of I/I in sewer basins identified as
having the highest I/I contributions. This information has been used to estimate the amount of
I/I that could be reduced through I/I correction projects.
8.1.2: Manhole Condition Assessments
Manhole inspection records are tracked in the field on paper log sheets or Mobile MSS. City
cleaning crews document the existence of manhole maintenance defects (e.g., roots, grease,
debris) found during sewer cleaning activities and identify whether an additional condition
assessment inspection needs to be performed (e.g., structural defects). Through this process,
every manhole in the system will be inspected by either a cleaning crew, manhole inspection
crew, or both in a six year-year cycle in conjunction with the system-wide sewer cleaning
program. The manhole condition assessment inspections focus on recording the severity of
manhole issues in a code-based format. Manhole inspection records are compiled, and all
repairs are prioritized based on severity.
8.1.3: Lift Station Assessment
The 2021 Sewer Collection System Master Plan (CSMP) included a condition assessment of
the City’s three stations and determine that several operation changes were warranted, but that
minor mechanical and electrical capital improvements were required during the 10-year
project projections.
Element 8 – System Evaluation and Capacity Assurance Plan
City of Rohnert Park Sewer System Management Plan, June 2025 34
8.1.4: Force Mains and Siphons
The City has a well-defined condition assessment program for the three force mains and those
assessments occur every five (5) years. Cleaning and inspection of the City’s force main
conveying the City’s flows to the Santa Rosa Subregional Treatment Plant are conducted
every five years, or as conditions warrant. The fifteen sewer siphons have no formally defined
condition assessment program. The City will be developing processes, procedures and
schedules for the condition assessment of the siphons before the next SSMP audit in 2028.
8.2: Capacity Assessment and Design Criteria
8.2.1: Hydraulic Analysis
A hydraulic model is a critical part of the sewer master planning process as it provides the
basis for understanding existing peak flows within the collection system and the impacts of
future development on the capacity of the system. For this master plan, Innovyze H2OMap
Sewer (10.5 SP1 Update #7) was selected to construct an all-pipes model. The physical
geometry (i.e., pipe diameter, pipe inverts, pipe length, and manhole rim elevations) came
from the City’s GIS data (updated by GHD based on record drawings).
Once the hydraulic backbone was built in the model, flow simulations were used to evaluate
system performance. The performance of the City’s sewer collection system was analyzed
using static flow simulations under peak dry weather flow (PDWF) and peak wet weather flow
(PWWF) scenarios for the existing and future conditions. The goal of the hydraulic analysis
was to identify system improvements that would be required to address current and future
system flow inadequacies.
Flow meter data provides the basis for the cumulative base and peak flows in each collection
system sewer basin for the existing condition scenario. I/I flow is based on a synthetic
hydrograph analysis for a 10-year return frequency, 24-hour duration design storm event, with
NOAA data providing the basis for the 10-year, 24-hour rainfall total. Having established the
normal dry weather diurnal flow patterns in each basin, the peak wet weather I/I component
for the design storm is added to the PDWF to establish the PWWF. Water billing records
provide the basis for distributing the average dry weather flow (ADWF) within each basin.
For the future conditions, sewer flows are calculated using unit flows for specific
developments for which there is known information about type (i.e., residential, commercial,
industrial, etc.) and number of units, while vacant parcels are assumed to be developed in
accordance with the 2040 General Plan Update land use categories.
The City has an ongoing I/I reduction program as part of an overall regional effort for the
Santa Rosa Subregional Wastewater Reclamation System. In addition to flow monitoring,
flow analysis, and modeling, described above, the City has conducted I/I source detection
field work, including manhole inspections and closed-circuit television (CCTV) inspection, to
identify specific sources of I/I in sewer basins identified as having the highest I/I
Element 8 – System Evaluation and Capacity Assurance Plan
City of Rohnert Park Sewer System Management Plan, June 2025 35
contributions. This information has been used to estimate the amount of I/I that could be
reduced through I/I correction projects.
8.2.2: System Evaluation and Capacity Assurance
The 2021 Sewer Collection System Master Plan resulted in a complete update of the hydraulic
model, and full evaluation of system capacity issues including the impacts of inflow and
infiltration into the system. Hydraulic evaluation of the sewer collection system was based on
the City resident’s water billing records from 2012 to August of 2017 and flow metering data
recorded by V&A in 2016 within the service area. The measured flows were used in a
hydraulic model to assess the performance of the collection system under various flow
conditions including ADWF, PDWF, and PWWF. ADWF is the average flow rate over a 24-
hour period during dry weather months, and PDWF is the peak flow rate occurring within that
same 24-hour period. The PWWF is the peak dry weather flow plus the peak infiltration and
inflow (I/I) rate resulting from a 24-hour, 10-year return frequency design storm.
The master planning effort builds upon previous City planning documents for the sanitary
sewer collection system, including the Sewer System Management Plan (SSMP) adopted in
August 2019. Many of the best management practices identified in the SSMP are currently
being carried out by the City for management of its collection system and associated
resources. The master planning effort does not replace information presented in those previous
planning documents, but rather, provides further context for recommendations and
conclusions presented therein.
8.2.2.1: Flow Projections
GHD reviewed the City’s current General Plan Land Use element for build-out conditions for
use in preparing the hydraulic model. The current condition model uses water billing records
and assumes the land use described in the City’s current Urban Water Management Plan
(UWMP). Land use mapping will be incorporated into the hydraulic model to enable
wastewater flow distribution. The hydraulic model requires accurate flow monitoring data to
provide the City with a planning tool that estimates flow conditions within the collection
system. The City provided five years of monthly water billing records and land use data for its
service area and flow data for its Main Pump Stations.
GHD used water billing records and zoning GIS land use data provided by the City to
calculate baseline flows for the hydraulic model evaluation and unit flows for various land use
categories. The ADWF and PWWF for existing conditions were based on the flow monitoring
work performed by V&A with the PWWF scaled for the design storm. The ADWF for each
basin was distributed throughout each basin based on the distribution of indoor potable water
demand established from water billing records. Estimated I/I was then distributed by inch-
diameter-mile of pipe in each basin or weighted to specific pipelines. This information was
based on field reconnaissance efforts conducted by V&A during the Sewer Flow Monitoring
Element 8 – System Evaluation and Capacity Assurance Plan
City of Rohnert Park Sewer System Management Plan, June 2025 36
and Inflow/Infiltration Study (V&A 2016a), the Inflow/Infiltration Reconnaissance Study
(V&A 2016b), and additional information provided by the City.
Having the base and peak flows established for existing conditions, estimated base flows for
future development were then added to simulate the buildout conditions based on the unit
flows, the General Plan Update land uses, information on vacant lots, and anticipated
development project information from the City’s Planning Department. The General Plan
Update had not been released at the time of the report preparation; however, GHD received
pertinent General Plan Update information from the City for this evaluation.
8.2.3: Prioritization of Corrective Actions
The level of service (LoS) and business risk exposure (BRE) provide a process by which risk
can be categorized, and activities to mitigate risk can be prioritized (maintenance and capital
improvements). The LoS framework includes an assessment for determining physical, service,
efficiency, and capacity useful lives used for evaluation of the conveyance system. A BRE
framework provides a set of rules for determining the direct and indirect consequences of the
failure of an asset and helps management teams focus on high-risk assets and related issues.
8.2.4: Capital Improvement Program (CIP)
The City CIP Planning Division is responsible for the development of and schedules for
capital asset additions and replacements. The Division, every two years, prepares both a long-
term project schedule and a five-year funding project request that is included in the City
budget approved by the City Council. The capital budget is based upon the findings from the
Collection System Master Plan adjusted annually for new operation information and any
condition assessment results, using the BRE described above.
The objective of master planning and asset management is to plan for the mix of management
strategies in maintenance and capital improvements that sustains organizational performance
over a long-term horizon, while minimizing lifecycle costs. The financial investment plan is
broken into three types of expenditures:
• Capital Improvement Plan (CIP)
• Renewal and Rehabilitation Program (ongoing)
• Operations & Maintenance Costs (ongoing)
8.2.5: Annual CIP Budget
The City maintains a Five-Year Capital Improvement Program (CIP). The CIP includes the
list of funding sources and schedule of expenditures for each project. The budget for the CIP
was adopted in July 2024. The City’s CIP includes manhole repairs to reduce I/I, pipe linings,
pump station upgrades, and sewer mains and lateral repair and replacements (including
condition assessment for pre-design). The City will incorporate a separate project for
condition assessment into the CIP in the future.
Element 8 – System Evaluation and Capacity Assurance Plan
City of Rohnert Park Sewer System Management Plan, June 2025 37
8.2.6: Project Funding
The sanitary sewer program is funded primarily thru sewer service charges. The last Sewer
Rate Study was completed in July 2024 and provided a five-year schedule of rate increases for
sewer customers. The new sewer rates were effective October 1, 2024. The Rate Study also
provided a ten-year financial plan which included substantial I/I study and improvements,
pump station upgrades, capacity improvements, force main and siphon rehabilitation and an
updated Sewer Master plan in FY 2032.
All capital improvement plan project expenditures are funded from the City Sewer CIP Fund.
8.3: Joint Coordination
The development of the CIP is coordinated by the CIP Program Manager who receives input
from the operations staff, Operations Utilities Manager, senior engineer and the Public Works
Director. CIP Division conducts extensive meetings with collection systems operations staff,
pump station operations, and other City division staffs at all stages from planning, design,
implementation, and construction. The City also requests input and comments on all project
plans by other utilities and agencies in the service area.
8.4: References
• WDR Attachment D8
• City of Rohnert Park Collection System Master Plan, February 2023
• City of Rohnert Park 2024 Sewer Rate Study -
https://www.rpcity.org/services/utility_biling/sewer_rate_update_information
• Rohnert Park Fiscal Year 2024-25 Adopted Budget -
https://www.rpcity.org/city_hall/administration/city_manager/public_information/budg
et
Element 9 – Monitoring, Tracking and Reporting System
City of Rohnert Park Sewer System Management Plan, June 2025 38
9.0: Element 9 – Monitoring, Tracking and Reporting
System
The SSMP must include an Adaptive Management section that addresses Plan-implementation
effectiveness and the steps for necessary Plan improvement, including:
The Enrollee shall:
a. Maintain relevant information, including audit findings, to establish and prioritize
appropriate Plan activities;
b. Monitor the implementation and measuring the effectiveness of each element of the
Plan;
c. Assess the success of the preventative maintenance activities;
d. Updating Plan procedures and activities, as appropriate, based on monitoring and
performance evaluations; and
e. Identifying and illustrating spill trends, including spill frequency, locations, and
estimated volumes.
9.1: Adaptive Management
The City regularly tracks and updates the performance results of the sanitary sewer program
and reports the findings in March of each year to the CIWQS database in the Annual Report.
In addition, the SERP is also reviewed for effectiveness and any changes are made to assure
proper and timely responses prior to the annual report certification requirement. The City also
pursues and evaluates the SSMP Audit Report corrective actions to determine when and how
the program should be modified and changed. Finally, the sewer program uses the historical
performance results, post spill assessments, and operation and maintenance results during the
development of the Annual Sewer Report to assess the need for further adaption of the
program to reduce spills to Waters of the State and to review and consider implementing
technology changes to further improve operations of the program. All modifications and
changes to the SSMP are then included in the SSMP Change Log.
9.2: Effectiveness
The effectiveness of each SSMP element is measured through the use of selected performance
indicators. These indicators are tracked and reported regularly and include the annual
performance requirements in the SSMP Annual Report submitted to the CIWQS system.
Performance indicator data are incorporated into historical graphs and provided in Appendix
E, Spill and Operation Performance Graphs.
Some of the historical performance indicators used by the City to evaluate effectiveness
includes the following:
Element 9 – Monitoring, Tracking and Reporting System
City of Rohnert Park Sewer System Management Plan, June 2025 39
• Total number of spills
• Spills by category
• Total volume of spills
• Total volume recovered
• Total volume to waters
• Annual gravity line cleaning, linear feet
• Annual CCTV, linear feet
• Annual Root foaming, linear feet
• Manhole inspections, each
9.3: Performance Monitoring and Program Changes
The City will evaluate the performance of its wastewater collection system regularly using the
performance monitoring information and measures identified in Sections 9.1 and 9.2. The City
will update the data and analysis in Section 9.3 and place revised graphs into Appendix E.
The City will prioritize its actions and initiate changes to the SSMP Elements and the related
programs based on the results of the evaluation and consistent with the requirements and
timing of SSMP Audits and Updates (See Element 10 SSMP Audits). Any and all changes
resulting will be included in the SSMP Change Log.
9.4: References
• WDR Attachment D9
• Appendix E Spills and Operational Performance Graphs
Element 10 – SSMP Audits
City of Rohnert Park Sewer System Management Plan, June 2025 40
10.0: Element 10 – SSMP Audits
The SSMP shall include internal audit procedures, appropriate to the size and performance of
the system, for the Enrollee to comply with section 5.4 (Sewer System Management Plan
Audits) of the 2022 General Order.
10.1: Audit Responsibilities
The City will audit its SSMP at least every three years from August 2, 2024. The audit will
determine whether the SSMP:
• Meets the current requirements of the WDR;
• Reflects the City’s current practices and procedures; and
• Is being followed by the City.
The audit report will be completed on or before February 2 of the following year of the three-
year audit period and will cover the previous two calendar years. The audit will be conducted
by a team of City Public Works Department staff. The audit team may also include members
from other areas of the City (e.g., Engineering), outside agencies, and/or contractors or
consultants.
The scope of the audit will cover each of the sections of the SSMP, the SSMP Change Log
and any sewer program support procedures. The results of the audit, including the
identification of any deficiencies and the steps taken or planned to correct them, will be
included in an Audit Report.
The Audit Report will be completed, LRO certified, and uploaded to the State CIWQS System
and filed within six-months of the end of the three-year audit period. Copies of the Audit
Reports will be retained for City for five years. Failure to upload the Audit Report by the
deadlines requires notification to the RWQCB along with a schedule to comply with the audit.
Failure to complete the Audit Report timely will not change the scheduled date for the next
and future audit periods and Audit Reports.
10.2: SSMP Updates
The City will update its SSMP at least every six years. The first update will be completed on
or before August 1, 2025. The City may determine the need to update the SSMP more
frequently based on the results of the three-year SSMP audit and the performance of its
sanitary sewer system using information from the Monitoring and Measurement Program (See
Element 9). If it is determined that an update is warranted, the process to complete the update
will be identified.
Consistent with the SSMP re-certification requirements, the City Staff will seek approval from
the City Council for any significant changes to the SSMP. The authority for approval of minor
changes (e.g., employee names, contact information, limited procedural changes) is delegated
Element 10 – SSMP Audits
City of Rohnert Park Sewer System Management Plan, June 2025 41
to the Public Works Director or Utilities Operations Manager and will be tracked and
identified in the SSMP Change Log.
10.3: References
• WDR Attachment D11
• Appendix B Sewer System Management Plan Audit Reports
Element 11 – Communication Program
City of Rohnert Park Sewer System Management Plan, June 2025 42
11.0: Element 11 – Communication Program
11.1: Communication Program
The Plan must include procedures for the Enrollee to communicate with:
• The public for:
o Spills and discharges resulting in closures of public areas, or that enter a source
of drinking water, and
o The development, implementation, and update of its Plan, including
opportunities for public input to Plan implementation and updates.
• Owners/operators of systems that connect into the Enrollee’s system, including
satellite systems, for:
o System operation, maintenance, and capital improvement-related activities.
11.2: Public Communications
The City regularly agendizes issues and sewer program reports and capital improvement
projects for Council consideration and adoption. In addition, at least every six years or when
major policy changes are required in the SSMP, the SSMP revisions will be agendized for
consideration and adoption of the changes.
The City regularly meets with representatives from Sonoma State University, Sonoma County
(Canon Manor), and Federated Indians of Graton Rancheria, respectively. Information on the
development, implementation and performance of the wastewater collection system will be
communicated to the representatives of the satellite sewer systems at these annual meetings.
Appendix A: Plan City Council Adoption Documents
City of Rohnert Park Sewer System Management Plan, June 2025 43
Appendix A: Plan City Council Adoption Documents
Appendix A: Plan City Council Adoption Documents
City of Rohnert Park Sewer System Management Plan, June 2025 44
Appendix A: Plan City Council Adoption Documents
City of Rohnert Park Sewer System Management Plan, June 2025 45
Appendix A: Plan City Council Adoption Documents
City of Rohnert Park Sewer System Management Plan, June 2025 46
Appendix A: Plan City Council Adoption Documents
City of Rohnert Park Sewer System Management Plan, June 2025 47
Appendix B: Plan Internal Audit Reports
City of Rohnert Park Sewer System Management Plan, June 2025 48
Appendix B: Plan Internal Audit Reports
Appendix C: Plan Change Log
City of Rohnert Park Sewer System Management Plan, June 2025 49
Appendix C: Plan Change Log
PLAN CHANGE LOG
Date SSMP
Element # Description of Change / Revision Made
Person
Authorizing
Change
Appendix D: Spill Emergency Response Plan
City of Rohnert Park Sewer System Management Plan, June 2025 50
Appendix D: Spill Emergency Response Plan
Appendix D: Spill Emergency Response Plan
City of Rohnert Park Sewer System Management Plan, June 2025 51
Appendix E: Spill and Operational Performance Graphs
City of Rohnert Park Sewer System Management Plan, June 2025 52
Appendix E: Spill and Operational Performance Graphs
Spill Performance Results
2
0
3
0
2
0 0
1 1
4
1
2
1
0
1
0
2
0
1
2
3
4
5
2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
Total Annual Spills
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
Annual Spills by Category
Cat 1 Cat 2 Cat 3 Cat 4
Appendix E: Spill and Operational Performance Graphs
City of Rohnert Park Sewer System Management Plan, June 2025 53
0
1
2
3
4
5
2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
Annual Spills by Cause
Debris Grease Roots Other
0
100
200
300
400
500
600
2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
Annual Spill Volume, Recovered and to Waters
Spill Vol Recovered Vol Vol to Waters
Appendix E: Spill and Operational Performance Graphs
City of Rohnert Park Sewer System Management Plan, June 2025 54
2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
Recovered Vol 100 0 26 0 100 0 0 100 66 38 0 50 100 0 27 0 0
Vol to waters 0 0 73 0 0 0 0 0 33 37 100 50 0 0 72 0 50
0
20
40
60
80
100
120
Pe
r
c
e
n
t
a
g
e
Annual Percentage of Recovered Vol vs Volume to Waters
Recovered Vol Vol to waters
0.00
2.00
4.00
6.00
8.00
10.00
12.00
2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
Comparison of SSO Rates/100 miles
City State RWQCB
Appendix E: Spill and Operational Performance Graphs
City of Rohnert Park Sewer System Management Plan, June 2025 55
Operational Performance Results
76,072 80,400 84,267 83,075
147,317
-
20,000
40,000
60,000
80,000
100,000
120,000
140,000
160,000
2020 2021 2022 2023 2024
Annual Gravity Pipe Cleaning, Linear Feet/Year
13.10%13.84%14.51%14.30%
25.36%
0.00%
5.00%
10.00%
15.00%
20.00%
25.00%
30.00%
2020 2021 2022 2023 2024
System Cleaning as Percent of System, 110 Miles
Appendix E: Spill and Operational Performance Graphs
City of Rohnert Park Sewer System Management Plan, June 2025 56
2655
17,853
54,351
80,417
49,193
9,903
0
10000
20000
30000
40000
50000
60000
70000
80000
90000
2019 2020 2021 2022 2023 2024
Annual CCTV, Linear Feet/Year
0.46%
3.07%
9.36%
13.85%
8.47%
1.71%
0.00%
2.00%
4.00%
6.00%
8.00%
10.00%
12.00%
14.00%
16.00%
2019 2020 2021 2022 2023 2024
CCTV as Percent of the System,110 Miles
Appendix E: Spill and Operational Performance Graphs
City of Rohnert Park Sewer System Management Plan, June 2025 57
22
261
20
63 66
0
50
100
150
200
250
300
2020 2021 2022 2023 2024
Annual Manhole Inspections
0.94%
11.18%
0.86%
2.70%2.83%
0.00%
2.00%
4.00%
6.00%
8.00%
10.00%
12.00%
2020 2021 2022 2023 2024
Manhole Inspections as Percent of System. 2335 Manholes
Appendix E: Spill and Operational Performance Graphs
City of Rohnert Park Sewer System Management Plan, June 2025 58
750
0
750
0
750
00
100
200
300
400
500
600
700
800
900
1000
2019 2020 2021 2022 2023 2024
Annual Root Foaming, Linear Feet