SEWER SYSTEM MANAGEMENT PLAN

Transcription

1 SEWER SYSTEM MANAGEMENT PLAN City of San Mateo Updated December 2015 Prepared by

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3 TABLE OF CONTENTS SANITARY SEWER MANAGEMENT PLAN INTRODUCTORY OVERVIEW 1 i Introduction 1 ii Document Organization 1 iii City Service Area and Collection System 3 iiii 8 ELEMENT 1: GOALS Collection System Management Goals 1-1 ELEMENT 2: ORGANIZATION Department of Public Works Organizational Chart Environmental Services Organizational Chart Environmental Services Personnel and Responsibility Chain of Communication for SSO Reporting Emergency Contact Personnel 2-8 ELEMENT 2 APPENDIX ITEMS 2.1 Public Works Business Plan ELEMENT 3: LEGAL AUTHORITY General Sewer Code Required Elements 3-1 i. Prevent Illicit Discharges 3-1 ii. Require Proper Design and Construction of Sewers and Connections 3-1 iii. Ensure Access for Maintenance and Inspection 3-2 iv. Limit Flows from Connected Sources 3-2 v. Ban New Connections 3-2 vi. Limit the Discharge of FOG and other Debris 3-3 vii. Enforce Violations of Sewer Ordinances & Collect Penalties 3-3 viii. Ownership and Maintenance of Sewers Sewer Use Fees 3-4 ELEMENT 3 APPENDIX ITEMS 3.1 Sewer Use Code 3.2 Sewer Fees 3.3a Estero Owners Agreements 3.3b Minor Partners Agreement 3.3c City of Belmont Agreement ELEMENT 4: OPERATIONS AND MAINTENANCE PROGRAM Collection System Maps and Information Information Management AutoCAD Utility Undeground Map Books GIS Computer Mapping Program CMMS Azteca Cityworks Map Update Procedures Preventative Operation and Maintenance Overview Citywide Sewer District Cleaning 4-6 Last Update: City of San Mateo SSMP TABLE OF CONTENTS

4 TABLE OF CONTENTS Target Cleaning of Problem Areas Cleaning Procedures Collection System Performance Rehabilitation and Replacement Plan Condition Assessment and Inspection Prioritization of Rehabilitation Five Year and Two Year Replacement and Rehabilitation Program Pumpstation Maintenance Private Lateral Replacement Program Sewer Staff Maintenance Training 4-12 ELEMENT 4 APPENDIX ITEMS 4.1 AutoCAD Standards 4.2 CCTV Standards 4.3 Sewer Mainline Cleaning Procedures 4.4 Pumpstation Maintenance 4.5 Sewer Maintenance Crew Training 4.6 Manhole Inspection Program 4.7 Targeted Cleaning of Problem Areas Hot-Spots & Leak Detection Program 4.8 Sewer Maintenance Dedicated Equipment and Personnel to Current Annual Sewer Cleaning Schedule Maps 4.10 Collection System Maps and Information 4.1.A.i Underground Utilities Map Page 4.1.A.ii Sewer Pumpstations and Trunklines Map 4.1.A.iii Sewer Collection System Pipe Sizes 4.1.A.iv Sewer Collection System Terrain Map 4.1.A.v Sewer Collection System Basin Map 4.1.A.vi Sewer Collection System Subbasin Map 4.1.A.vii Sewer Collection System Cleaning Areas Map (Current Snapshot) 4.1.A.viii Sewer District Cleaning Schedule Maps (Current Snapshot) ELEMENT 5: DESIGN AND PERFORMANCE PROVISIONS Standards for Installation, Rehabilitation, and Repair Standards for Inspection & Testing of New, Rehabilitated, and Repaired Facilities 5-1 ELEMENT 5 APPENDIX ITEMS 5.1 City of San Mateo Sanitary Sewer Details and Appurtenances ELEMENT 6: OVERFLOW AND EMERGENCY RESPONSE PLAN Purpose Statewide WDR Requirement SSO Categories Incident Notification Role of Responders Designated Emergency Responders Spill Response Equipment Field Procedures Sewage Estimation Water Quality Sampling Water Quality Monitoring Program SSO Technical Report 6-9 Last Update: City of San Mateo SSMP TABLE OF CONTENTS

5 TABLE OF CONTENTS 6.13 Investigation and Documentation Procedure Failure Analysis Investigation Documentation Regulatory Reporting SSO Response Training Initial Refresher Training SSO Response Drills SSO Training Record Keeping SSO Response within Private Property 6-18 ELEMENT 6 APPENDIX ITEMS 6.1 Contingency Equipment 6.2 SSO Field Procedures 6.3 Investigation and Documentation Forms 6.4 Spill Calculation and Estimation 6.5 Signage and Posting Procedures 6.6 Public Notification Procedures 6.7 Water Quality Monitoring Program 6.8 SSO Technical Report ELEMENT 7: FATS, OILS, AND GREASE (FOG) CONTROL PROGRAM Background Public Outreach Program FOG Disposal Legal Authority Grease Removal Device Requirements Best Management Practices Inspection and Enforcement Procedures Service Area FOG Evaluation 7-5 ELEMENT 7 APPENDIX ITEMS 7.1 FOG Supporting Materials 7.1.A Outreach Materials (commercial & residential) 7.1.B Waste Discharge Permit (WDP) 7.1.C WDP Standard Terms, Conditions & Requirements 7.1.D Best Management Practices for Food Services Facilities 7.1.E Pretreatment System Maintenance Log 7.1.F Waste Discharge Permits Q & A s 7.1.G Inspection Form Food Service Facility 7.1.H Preventative Maintenance: FOG Hot Spots (Schedule and Map) ELEMENT 8: SYSTEM EVALUATION AND CAPACITY ASSURANCE PLAN Background Project Drivers and Capacity Assessment Criteria Capital Improvement Program Budget And Schedule 8-2 ELEMENT 8 APPENDIX ITEMS 8.1 Historic Capacity Assurance Efforts 8.2 Capacity Analysis Technical Memorandum 8.3 Draft 20-Year Integrated Wastewater Master Plan Executive Summary Last Update: City of San Mateo SSMP TABLE OF CONTENTS

6 TABLE OF CONTENTS 8.4 CIP Budget and Schedule ELEMENT 9: MONITORING, MEASUREMENT, AND PROGRAM MODIFICATIONS Data Collection Data Reporting Sanitary Sewer Overflows (SSOs) 9-2 ELEMENT 10: SSMP PROGRAM AUDITS Summary 10-1 ELEMENT 10 APPENDIX ITEMS 10.1 SSMP Change Log 10.2 SSMP Audit Blank Form 10.3 Recent SSMP Audit Report ELEMENT 11: COMMUNICATION PROGRAM 11.1 Sewer Fees and Sewer Fund Private Lateral Replacement Program Sewer Maintenance Public Outreach FOG Program Outreach 11-2 ELEMENT 11 APPENDIX ITEMS 11.1 Proposition 218 Sewer Fee Public Notifications 2009 to Current 11.2 Private Lateral Replacement Program (PLRP) Handouts 11.3 Sewer Maintenance Public Outreach Last Update: City of San Mateo SSMP TABLE OF CONTENTS

7 SSMP INTRODUCTORY OVERVIEW SSMP INTRODUCTORY OVERVIEW i. INTRODUCTION The purpose of the City of San Mateo s Sewer System Management Plan (SSMP) is to document activities that the City utilizes to manage its wastewater collection system effectively. Effective management of a collection system includes: Minimizing the number and impact of sanitary sewer overflows (SSOs). Providing adequate sewer capacity to convey peak flows. Maintaining and improving the condition of the collection system infrastructure in order to provide reliable service into the future. ii. DOCUMENT ORGANIZATION This SSMP has been prepared by City of San Mateo Department of Public Works staff in compliance with requirements of the San Francisco Bay Regional Water Quality Control Board (RWQCB) pursuant to Section of the California Water Code. The SSMP is intended to meet the requirements of the Statewide General Waste Discharge Requirements (GWDR), amended by Order No , Amended Monitoring and Reporting Program. The SSMP includes eleven elements as listed below. Each of these elements forms a section of this document. SSMP ELEMENTS 1. Goals. Collection System Management Goals. 2. Organization. Organization of Personnel, including the chain of command and communications. 3. Legal Authority 4. Operations and Maintenance Program 5. Design and Performance Provisions 6. Overflow Emergency Response Plan 7. FOG Control Program 8. System Evaluation and Capacity Assurance Plan 9. Monitoring, Measurement and Plan Modifications 10. SSMP Program Audits 11. Communication Plan Last Update: City of San Mateo SSMP INTRODUCTORY OVERVIEW

8 SSMP INTRODUCTORY OVERVIEW Table ii.1. SSMP Required Elements and Dates of Original Submittal/Adopted SSMP Update REQUIRED SSMP ELEMENTS REQUIRED DATE OF SUBMITTAL RWQCB STATEWIDE SSMP WDR S ACTUAL COMPLETION DATE 1. Goals Aug. 31, 2006 Nov. 1, 2007 June 1, Organization Aug. 31, 2006 Nov. 1, 2007 June 1, Legal Authority Aug. 31, 2007 May 1, 2009 Aug. 1, Operations and Maintenance Program 5. Design and Construction Standards and Performance Provisions 6. Overflow Emergency Response Plan 7. FOG Control Program 8. System Evaluation and Capacity Assurance Aug. 31, 2007 May 1, 2009 Aug. 1, 2007 Aug. 31, 2007 Aug. 1, 2009 June 1, 2006 Aug. 31, 2006 May 1, 2009 March 2005 Aug. 31, 2006 May 1, 2009 Aug. 1, 2006 Aug. 31, 2008 Aug. 1, 2009 PH 1 6/05 PH2 12/07 UPDATES Dec June 2009 March 2012 September 2014 August 2015 Dec June 2009 April 2010 April 2012 December 2014 August 2015 Dec May 2009 April 2011 April 2012 November 2014 August 2015 Dec July 2009 June 2011 April 2012 November 2014 August 2015 Aug. 1, 2009 Sept August 2015 Aug Oct Nov May 2009 Feb May 2011 April 2012 April 2014 August 2015 July 2009 May 2012 September 2014 August 2015 July 25, 2009 Nov. 15, 2009 March 2010 August 2015 Last Update: City of San Mateo SSMP INTRODUCTORY OVERVIEW

9 SSMP INTRODUCTORY OVERVIEW REQUIRED SSMP ELEMENTS 9. Monitoring, Measurement, and Plan Modifications 10. SSMP Program Audits 11. Communication Program REQUIRED DATE OF SUBMITTAL RWQCB STATEWIDE SSMP WDR S ACTUAL COMPLETION DATE Aug. 31, 2008 Aug. 1, 2009 Aug. 29, 2008 Aug. 31, 2008 Aug. 1, 2009 Aug. 22, 2008 Aug. 1, 2009 July 25, 2009 UPDATES July 2009 Jan Feb September 2014 August 2015 July 2009 Jan April 2012 December 2014 August 2015 July 2009 May 2012 December 2014 August 2015 iii. CITY SERVICE AREA AND COLLECTION SYSTEM San Mateo is located in San Mateo County at the crossroad of Highway 101 and Highway 92. San Mateo and is situated with San Francisco to the north, San Jose to the south, and the San Francisco Bay to the east, as shown in Figure 2-1 on the following page. San Mateo at a glance: The San Francisco to San Jose railroad track was completed in 1864 with its first service through San Mateo on October 17, 1863 The first volunteer fire department was officially organized on March 18, 1889 San Mateo was incorporated on September 3, 1894 The wastewater treatment plant (WWTP) has been operating since 1935 Incorporated area is 13 square miles Current population (2010) is 94,650 residents San Mateo is a built-out City that is mostly residential, single and multi-family, with some commercial business areas and a small amount of light industrial uses Temperatures vary from a mean average of 49 degrees Fahrenheit in January to a mean average of 72 degrees Fahrenheit in July. San Mateo has a mean annual rainfall of 13.4 inches. Last Update: City of San Mateo SSMP INTRODUCTORY OVERVIEW

10 SSMP INTRODUCTORY OVERVIEW Figure 1. Service Area Map The City of San Mateo Department of Public Works (DPW) Environmental Services Division (Division) provides stewardship of the City s sanitary sewer assets, including a 15.7 MGD Wastewater Treatment Plant (WWTP) serving more than 130,000 people, 234 miles of collection system mainlines, 5,711 manholes, and 26 sewer lift stations. A map of the City s service area is shown in figure 2-1. The Division is responsible for meeting the required level of service, including all permit requirements, in the most cost effective way through engineering, construction, maintenance, operation and rehabilitation of sanitary sewer assets to provide for present and future customers. The sanitary sewer collection system is predominantly made of vitrified clay pipe and the majority of the system was built in the mid-1900 s. The collected water is conveyed to the WWTP for treatment and disposal. San Mateo s WWTP is a jointly owned facility. San Mateo owns approximately 75% and Foster City Estero Municipal Improvement District (EMID) owns approximately 25% of the Last Update: City of San Mateo SSMP INTRODUCTORY OVERVIEW

11 SSMP INTRODUCTORY OVERVIEW facility. The ownership agreement is through a joint powers agreement (JPA) that is included in the SSMP Appendix as Appendix 3.3. San Mateo s 75% facility ownership is jointly used by San Mateo and four partners which include: the Town of Hillsborough (4.16%), Crystal Springs County Sanitation District (4.93%), the County of San Mateo (.37%), and the City of San Mateo (65.54%). This Sanitary Sewage Agreement between San Mateo and its Minor Partners was entered into on July 18, The agreement sets forth the arrangements and relationships regarding the use of sewage conveyance and treatment facilities. This Minor Partners Agreement is also included in Appendix 3.3. Sanitary Sewer Collection System Assets Tables iii.1 through iii.6 provide information about the City s sewer collection system assets. Pipe Size Table iii.1. Size and Distribution of Active Sewers Gravity Sewer Length (feet) Forcemain Length (feet) Total Length (feet) Total Length (miles) Percentage of Total 4 2,685 1,691 4, % 6 706, , % 8 276,545 2, , % 10 60,918 5,572 66, % 12 37,153 2,283 39, % ,490 7, % 15 31,420 31, % 18 36,795 36, % 21 7,162 4,118 11, % 24 15,607 15, % 27 5,304 5, % 30 6,547 4,797 11, % 33 4,061 2,522 6, % 36 4, , % 39 5,016 5, % % 54 (outfall) 3,382 3, % 1,200,206 36,190 1,236, % Notes: (1) Quantities were taken from City s GIS maps. It should be noted that while the forcemain quantities exactly match Tables iii.2-4 of the SSMP, the gravity sewer lengths differed by 8,866 feet due to discrepancies in 6-, 10-, and 36-inch diameter lengths. This table was taken from the 2014 Master Plan. (2) Total length includes gravity sewer, forcemains, and outfall owned by the City. Last Update: City of San Mateo SSMP INTRODUCTORY OVERVIEW

12 SSMP INTRODUCTORY OVERVIEW Table iii.2. Distribution of Gravity and Forced Sewers Pipe Length (feet) Length (miles) Percentage of System (by length) Forced 35, Gravity 1,209, TOTAL 1,245, % Table iii.3. Distribution of Sewer Mainlines in a Right-of-Way Versus Easement Pipe Length (feet) Length (miles) Percentage of System (by length) Right-of-way 864, % Easement 380, % TOTAL 1,245, % Table iii.4. Breakdown of Sewer Collection System by Age Pipe Age Length (feet) Length (miles) Percentage of System present 14, , , , , , Before TOTAL 1,245, % Table iii.5. Breakdown of Sewer Collection System by Age & Type, & Pumpstations Pipe Age Length (miles) Length (feet) Length (feet) Number of Gravity Sewer Gravity Sewer Forcemain Pumpstations present , ,674 2, ,966 11, ,873 13, ,103 8, , Before TOTAL 229 1,209,257 35, Last Update: City of San Mateo SSMP INTRODUCTORY OVERVIEW

13 SSMP INTRODUCTORY OVERVIEW Station Table iii.6. Sanitary Sewer Pumpstation Names and Capacity Address # Pumps Est. Capacity: GPM per Pump Total Dynamic Head Est. Daily Flow* (GPD) Est. Daily Capacity (Gallons w/ One Pump) 01 Mongini 2005 Pacific ,600 1,296, Arroyo 20 Arroyo , , Parkwood 1932 Parkwood ,350 72, Toyon 1629 Toyon ,400 72, th Ave 3796 El Camino Real ,000 1,152, nd Ave 1 42 nd Ave , , Laurie Meadows 08 Woodbridge 95 Laurie Meadows 101 Woodbridge Circle , , , , Santa Clara 404 Santa Clara ,000 1,440, Los Prados # Los Prados ,800 1,094, Los Prados # Los Prados , , Los Prados # Los Prados , , Flint & Norfolk 2413 S. Norfolk ,000 1,008, Kehoe & Kelly 2223 Kehoe , , Kehoe & Scott 2444 Kehoe , , nd & Quebec 203 S. Quebec , , Chatham East 205 N. Quebec ,400 43, Mariners Island #1 Mariners Island #2 Mariners Island #3 Mariners Island #4 Mariners Island #5 408 Anchor , , Mariners Island 3 1, ,044,0 00 2,016, Neptune , ,000 Mariners Island Blvd / W. Cape 1659 Vista Del Mar (1801 M.I. Blvd) ,000 1,440, , ,000 Last Update: City of San Mateo SSMP INTRODUCTORY OVERVIEW

14 SSMP INTRODUCTORY OVERVIEW Station Address # Pumps Est. Capacity: GPM per Pump Total Dynamic Head Est. Daily Flow* (GPD) Est. Daily Capacity (Gallons w/ One Pump) 23 Mariners Island # Winward Way (2001 Gateway) , , st Ave 3971 Pacific Blvd ,000 1,296, Dale Ave Dale Ave / Patricia 5 10, ,023, ,400, th Ave/ 26 Bay Meadows , ,000 Saratoga Dr * Estimated Daily flow is based on pump run-times, gpm of station, in dry weather (24 hr period). The first 24 sanitary sewer pumpstations (operated by Sewer and Storm Maintenance) are located mostly in the eastern (flatter) half of the City to assist in the conveyance of wastewater to the WWTP. Pumps alternate automatically and there are no lead / lag pumps. Wet well operations are set to limit pump starts and stops and in-line storage of wet weather flows occurs automatically. Power outages occur infrequently and average about eight a year. Three portable generators (exercised under load annually) are assigned specifically to the pump crew for use in power outage situations. Flint & Norfolk, Dale, and Bay Meadows receive most of the flow from the City of San Mateo sewer collection system. Pumpstation 25, Dale Avenue was operated and maintained by the wastewater treatment plant. An operations and maintenance manual was prepared and maintained by WWTP personnel for this pumpstation. Flows received by Dale Avenue pumpstation west of the Marina Lagoon are delivered to the influent junction box (IJB) at the WWTP via one 30 and one 33 forcemain. The pumpstation is connected to the WWTP SCADA system and controlled by PLC. It has a 1200KW dedicated automatic standby generator. The pumpstation has two wet wells that are combined in the summer for energy efficiency and operated separately during the rainy season to ensure high flows from west of HWY101 do not inundate the flat areas east of HWY101. The operation of this pumpstation impacts both the volume of flow into the WWTP and the potential for collection system SSOs upstream. iv. ENVIRONMENTAL SERVICES DIVISION The (ESD) was created in 2001 to bring all of the activities involved in wastewater collection and treatment, including planning, engineering, construction and operations, into one Division within the Department of Public Works to improve coordination and information flow and provide a consistent mission and vision. The organizational structure was modified in Details about the Division s current structure can be found in Element 2, Organization, of this SSMP. Last Update: City of San Mateo SSMP INTRODUCTORY OVERVIEW

15 SSMP INTRODUCTORY OVERVIEW Environmental Services is responsible to update and modify the SSMP plan on an ongoing basis. Last Update: City of San Mateo SSMP INTRODUCTORY OVERVIEW

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17 GOALS ELEMENT 1: COLLECTION SYSTEM MANAGEMENT GOALS SWRCB Waste Discharge Requirement: The goal of the Sewer System Management Plan (SSMP) is to provide a plan and schedule to properly manage, operate, and maintain all parts of the sanitary sewer system. This will help reduce and prevent SSOs, as well as mitigate any SSOs that do occur. 1.1 COLLECTION SYSTEM MANAGEMENT GOALS The Sewer Operations and Maintenance Section (Sewer Maintenance) utilizes preventative maintenance practices in their efforts to maintain and operate the sanitary sewer collection system. Sewer Maintenance works in tandem with Sewer Engineering in efforts to improve the condition of and extend the life of collection system assets. The has developed this SSMP to achieve the following collection system management goals and objectives listed below. These goals and objectives have been adopted into the budget. Proper maintenance, operations and management all parts of the wastewater collection system Provision of adequate capacity in the collection system to convey peak flows Minimize the frequency of sanitary sewer overflows (SSOs) Mitigate the impact of SSOs Objectives of Sewer Maintenance Preventative Maintenance Program include: 1. Implement Preventative Maintenance on the collection system to address SSOs. a. Clean all sewer mainlines within the identified required maintenance period b. Continue with monthly, quarterly, bi-annual and annual preventative maintenance hydro-cleaning and power-rod cleaning of identified sewer mainline target (problem) areas c. Maintain a video condition assessment program d. Maintain Root Control Program and root-foam identified areas on a rotating basis e. Refer mainlines with repeat non-scheduled maintenance to sewer engineering for evaluation f. Conduct appropriate analysis/evaluation of SSOs utilizing historical maintenance and activity data and records and provide recommendations to reduce future risk Last Update: City of San Mateo SSMP Element 1: GOALS

18 GOALS 2. Identify collection system blockages due to fats, oil and grease (FOG) and develop strategies to decrease backups. 3. Mitigate the impact of SSOs on public health and the environment. 4. Operate all pumpstations efficiently and perform required preventive maintenance on equipment at all sanitary sewer pumpstations. 5. Maintain records of the sanitary sewer system and respond to inquiries. 6. Assist with the development of a capital improvement program directed at maintaining the current sewer assets, improving system reliability and providing adequate future capacity. 7. Be available and responsive to the needs of the public and work cooperatively with local, state, and federal agencies to reduce, mitigate impacts of, and properly report SSOs. Last Update: City of San Mateo SSMP Element 1: GOALS

19 ORGANIZATION ELEMENT 2: ORGANIZATION SWRCB Waste Discharge Requirement: The Sewer System Management Plan (SSMP) must identify The name of the responsible or authorized representative as described in Section J of the SSO WDR. The names and telephone numbers for management, administrative, and maintenance positions responsible for implementing specific measures in the SSMP program. The SSMP must identify lines of authority through an organization chart or similar document with a narrative explanation; and The chain of communication for reporting SSOs, from receipt of a complaint or other information, including the person responsible for reporting SSOs to the State and Regional Water Board and other agencies if applicable (such as County Health Officer, County Environmental Health Agency, Regional Water Board, and/or State Office of Emergency Services (OES)). 2.1 ENVIRONMENTAL SERVICES DIVISION In 2012, the DPW was re-organized to consolidate all engineers under the City Engineer into an Engineering Division, and to consolidate operations and maintenance functions of the collection system, wastewater treatment plant, and a new Regulatory Compliance Section into the. The Division includes operations and maintenance personnel and facilitates communication between and management of the collection and treatment of sewage. 2.2 DEPARTMENT OF PUBLIC WORKS (DPW) ORGANIZATIONAL CHART Figure 2-1 on the following page shows the Department of Public Works Organizational Chart as of July Last update: City of San Mateo SSMP Element 2: ORGANIZATION

20 ORGANIZATION Figure 2-1. Public Works Organizational Chart City Council City Manager Public Works Department Director of PW Admin/Analysts *Environmental Services Deputy Director Public Works Deputy Director Clean Water Program Manager Engineering Services Manager Facility & Fleet Services Manager *The organizational chart is described in the following section. 2.3 ENVIRONMENTAL SERVICES DIVISION ORGANIZATIONAL CHART Figure 2-2 on the following page shows the Organization Chart as of July 2015 Last update: City of San Mateo SSMP Element 2: ORGANIZATION

21 ORGANIZATION Figure 2-2. Environmental Services Organizational Chart *Position funding and staffing charts contained in the City s Budget can be found in the SSMP Appendix 2.1. Last update: City of San Mateo SSMP Element 2: ORGANIZATION

22 ORGANIZATION 2.4 ENVIRONMENTAL SERVICES PERSONNEL AND RESPONSIBILITY The following descriptions define the role of the Council and staff as related to the SSMP. CITY COUNCIL Establishes policy. CITY MANAGER Assists in the development, planning and implementation of goals and objectives related to the overall administrative activities and operations of the City; Administers City policies and procedures. Reports to the City Council. CITY ENGINEER Performs professional engineering work in the design, investigation, and construction of public works and related projects; acts as project manager in assigned capital projects and does related work as required. Participates in the planning, checking, review, and processing of plans. Develops revised design and construction standards. Administers and enforces City Codes and standards on engineering projects. Reports to the Engineering Manager. DIRECTOR OF PUBLIC WORKS Assists in the development, planning and implementation of goals and objectives related to the.. Administers Departmental policies and procedures. Reports to the City Manager. DEPUTY DIRECTOR OF ENVIRONMENTAL SERVICES DEPARTMENT, Manages the sanitary sewer and storm drainage collection systems, the operations and maintenance of the wastewater treatment plant, and the Regulatory Compliance Section. Plans O&M strategy, leads staff, allocates resources, and delegates responsibility. Reports to the Director of Public Works. SENIOR. PROJECT MANAGER, Responsible for management of the computerized maintenance management system (CMMS) and ensures sewer maintenance activities are captured electronically in the CMMS. Reports to the Deputy Director of Environmental Services. REGULATORY COMPLIANCE MANAGER, Coordinates permits, laws, and regulations related to stormwater management and pretreatment programs; manages FOG program. Reports to the Deputy Director of Environmental Services. FIELD MAINTENANCE MANAGER, Manages collection system field operations and maintenance activities, provides relevant information to management; prepares contingency plans. Investigates SSOs and plans strategy to minimize non-capacity related repeat SSOs. Last update: City of San Mateo SSMP Element 2: ORGANIZATION

23 ORGANIZATION Responsible for implementing, managing and updating the SSMP. Reports to the Deputy Director of Environmental Services. PUBLIC WORKS SUPERVISOR / SEWER MAINTENANCE SUPERVISOR, Recommends and assists in the implementation of program goals and objectives and standard operating procedures. Organizes and supervises crews of skilled and semi-skilled personnel. Reports to the Field Maintenance Manager. SAFETY COORDINATOR Coordinates safety training and supports Department safety programs. Reports to the Deputy Director of Environmental Services. SEWER LEADWORKER, or Directs preventative maintenance activities, trains field crews, and prepares and implements contingency plans. Reports to the Public Works Supervisor. PUMP MECHANIC, or Responsible for maintenance and operations of the City s lift stations; implements preventative maintenance at pumpstations and provides 24 hour emergency response. Reports to the Public Works Supervisor. MAINTENANCE WORKER Operates maintenance equipment and tools. Installs and repairs underground pipes and removes blockages from sewer. Performs routine preventative maintenance on equipment used for sewer operations. Assists pump crew when needed. Performs emergency response on sewer related issues. Reports to the Sewer Leadworker. SSO FIRST RESPONDERS Rotating assignment among crew and leadworkers. Mobilize and respond to notification of SSOs, ensure proper containment, blockage removal and clean-up activities. Contact appropriate staff and agencies in response to an SSO and submit initial report online to the CIWQS website. Investigate SSOs and report findings to Public Works Supervisor and Senior Project Manager. Report to the Public Works Supervisor. Table 2-1 on the following page lists the responsible staff person for each of the SSMP Elements. Last update: City of San Mateo SSMP Element 2: ORGANIZATION

24 ORGANIZATION Table 2-1. List of City Staff Responsible for SSMP Elements SSMP Element Responsible Position I. Goals The City Manager leads staff in the implementation of the City s goals. The Environmental Services Deputy Director leads Division staff in meeting SSMP goals. II. Organization III. Legal Authority IV. Operations & Maintenance V. Design and Construction Standards VI. Overflow Emergency Response Plan VII. FOG Control Program VIII. System Evaluation and Capacity Assurance The Environmental Services Deputy Director recommends updates to the Public Works Director and City Manager related to the Division organizational structure. City Council approves any organizational changes. The City Manager upholds the City Ordinance. The Environmental Services Deputy Director manages the City s sewer-related resources and budget. The Field Maintenance Manager, under direction of the Deputy Director, manages outreach program; prioritizes preventive maintenance; maintains a current collection system map; and schedules inspections and condition assessments. The Public Works/Sewer Maintenance Supervisor maintains contingency equipment and replacement inventories and schedules sewer-related training. The City Engineer reviews design and construction documents to ensure that all construction projects meet the City s standards, and also updates standards for installation, rehabilitation and repair, as needed. The City Engineer manages the inspection of all construction projects to ensure the City s construction standards have been followed. The Field Maintenance Manager maintains the Overflow Emergency Response Plan. The Public Works/Sewer Maintenance Supervisor implements the plan, makes revisions, and oversees regular training for maintenance crew members. The Field Maintenance Manager identifies grease hot spots and maintains an effective cleaning program for grease problem sewers with the assistance of the Regulatory Compliance Manager. Regulatory Compliance Manager and/or Environmental Compliance inspectors enforce discharge regulations, as needed. The City Engineer establishes and assesses capacity requirements for the City s collection system and manages preparation and implementation of the City s System Evaluation and Capacity Assurance Plan. The Environmental Services Deputy Director and City Engineer develop and implement the City s long-term Last update: City of San Mateo SSMP Element 2: ORGANIZATION

25 ORGANIZATION SSMP Element IX. Monitoring, Measurement and Program Modifications Responsible Position Capital Improvement Plan including updating budgets and schedules. The Environmental Services Deputy Director monitors implementation and assesses success of the overall SSMP program elements. X. SSMP Audits The Field Maintenance Manager with the assistance of the Regulatory Compliance Manager performs biennial audit of the sections of the SSMP. XI. Communication Plan The City Council, City Manager, Director of Public Works, and Environmental Services Deputy Director communicate with the public and nearby agencies of the City s SSMP. 2.5 CHAIN OF COMMUNICATION FOR SSO REPORTING To facilitate consistent reporting procedures for the public, the Department of Public Works has implemented a one-stop call center. Emergency sewer calls are directly dispatched to the sewer response crew. Off-hours, the emergency sewer telephone number rolls over to dispatch. The DPW has a process for receiving, responding to and reporting SSOs. The Sewer Response Crew arrives first and assesses the situation. If the event is an SSO, the response crew calls the SSO First Responder/SSO Response Crew. After the event, the SSO First Responder is responsible for communicating the details of the event to management, ensuring all necessary paperwork is completed in full. Additional information about the Chain of Communication for SSO Reporting is as follows: The Public Works customer service phone line ( ) is staffed Monday through Friday 8am to 5pm to receive all incoming calls. After normal business hours, the Public Works general number is forwarded to Police Dispatch staffed to receive all incoming calls. Emergency Response Crew (Utility 5) receives call from DPW staff or dispatch and arrives on site. If SSO is confirmed, Emergency Response Crew calls: Normal working hours Sewer Leadworker During off hours On call leadworker and PW Supervisor Contact information is provided in Table 2-2. At site, SSO Response Crew will call a PW Supervisor and the Sr. Project Manager. Additional crews and/or the pump crew will be dispatched if necessary for assistance with mitigation, blockage clearing, water sampling and clean-up. Last update: City of San Mateo SSMP Element 2: ORGANIZATION

26 ORGANIZATION The PW Supervisor will immediately contact the Field Maintenance Manager if the SSO is CAT1. SSO First Responder contacts appropriate agencies, completes appropriate forms, submits online report within required timeframes, and compiles all information and photos for submittal to Public Works Supervisor. SSO First Responder is responsible for contacting OES at (800) within 2 hours for a CAT1 SSO. Public Works Supervisor enters data in CIWQS, certifies the online SSO Report to the Water Board, and updates electronic asset management/cmms information and GIS data. 2.6 EMERGENCY CONTACT PERSONNEL EMERGENCY CONTACT PHONE NUMBERS Collection System Responsible Parties Table 2-2. Utility 5 - Emergency Response Crew Phone # (650) Mobile # (Area Code 650) Group Staff Position Work # (Area Code 650) PW Ray Jackson Manager Steve PW Camilleri Supervisor Environmental Services Supervisors Sewer Lead Workers Pump Crew PW Supervisor Ed Vigil Rob Learmonth Leadworker Rick Piña Leadworker Tony Baltodano Noel Padilla Pump Mechanic Pump Mechanic APPENDIX 2 SUPPORTING DOCUMENTS FOR ELEMENT 2 Appendix 2.1 Public Works Business Plan Last update: City of San Mateo SSMP Element 2: ORGANIZATION

27 LEGAL AUTHORITY ELEMENT 3: LEGAL AUTHORITY SWRCB Waste Discharge Requirement: 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: Prevent illicit discharges into its sanitary sewer system (examples may include I/I, stormwater, chemical dumping, unauthorized debris and cut roots, etc.); Require that sewers and connections be properly designed and constructed; Ensure access for maintenance, inspection, or repairs for portions of the lateral owned or maintained by the Public Agency; Limit the discharge of fats, oils, and grease and other debris that may cause blockages, and Enforce any violation of its sewer ordinances. 3.1 GENERAL The City of San Mateo s Municipal Code has a comprehensive sewer use ordinance. Chapter 7.38 of Title VII, Health and Sanitation, pertains to Sanitary Sewer Use. This Chapter is available at the City of San Mateo website ( and in Appendix 3.1 of this SSMP. Chapter 3.54 of Municipal Code Title III, Taxation and Finance, pertains to Sewer Service Charges and Connection Fees. This Chapter is also available via the web or in Appendix 3.2 of this SSMP. 3.2 SEWER USE CODE REQUIRED ELEMENTS The following sections provide requirements related to sewer system management. i. Prevent illicit discharges into its sanitary sewer system (examples may include I/I, storm water, chemical dumping, unauthorized debris and cut roots, etc.). Illicit discharges are controlled through requirements established in the following sections of the Municipal Code: Pretreatment+ Requirements General Discharge Prohibition Specific Discharge Prohibitions Limitations on Point of Discharge Prohibition against Dilution ii. Require that sewers and connections be properly designed, constructed and maintained. Last Update: City of San Mateo SSMP Element 3: LEGAL AUTHORITY

28 LEGAL AUTHORITY Approval of Plans for Sewer Construction This section requires that all construction or alteration of any building sewer, sanitary sewer, public sewer, side sewer, or other facility shall require approval by the City. This approval is accomplished by requiring an encroachment permit and/or building permit. The permit requires that the work be done in accordance with City standards or as specifically approved by the Director of Public Works or his or her designee. iii. Ensure access in easements, right-of-ways, and any other areas sanitary sewer system facilities are installed for maintenance, inspection, and repairs of the sanitary sewer system and for any portions of the service lateral owned or maintained by the Enrollee Access to Sanitary Sewer System This section requires that property owners must provide unobstructed access to sewer lines and manholes located in easements on their property. For further information on easement access procedures, refer to Chapter 6, Overflow Emergency Response Plan, Section 6 Spill Response Field Procedures. iv. Limit flows to the sanitary sewer system from connected sources including service laterals and satellite collection systems. Satellite wastewater collection systems are included in these prohibitions by reference. Person is defined as any individual, partnership, firm, associations, or public agency. Satellite agencies that contribute flow to the San Mateo collection system include; Crystal Springs County Sanitation District Town of Hillsborough County of San Mateo City of Belmont There is one four-party agreement that establishes the legal obligations of these parties and a separate agreement for the City of Belmont. The agreements are included in SSMP Appendix 3.3. v. Ban new connections The following sections establish requirements governing new connections: Approval of Plans for Sewer Construction New Sources General Discharge Prohibitions Limitations on Point of Discharge Last Update: City of San Mateo SSMP Element 3: LEGAL AUTHORITY

29 LEGAL AUTHORITY Waste Discharge Permits Modification, Suspension or Revocation of Permit Emergency Termination of Service vi. Limit the discharge of roots, fats, oils, and grease and other debris that may cause blockages. The following sections of the Municipal Code limit discharge of fats, oils, and grease into the sewer system: Definition of Food Service Facility and Grease Pretreatment of Industrial Facilities (Food Service) Specific Discharge Prohibitions Requirements for Food Service Facilities See Element 7 of this Sewer System Management Plan for a more detailed discussion of the City s FOG program. vii. Enforce any violation of its sewer ordinance and, if applicable, collect penalties. Authority to enforce violations of the sewer ordinance is provided through the following sections: Authority to Inspect and Monitor Compliance with Chapter Administrative Remedies Violations deemed a Public Nuisance Civil Penalties Injunctive Relief Criminal Penalties California Code of Civil Procedure Emergency Termination of Services viii. Ownership and Maintenance of Sewers The WDR states that, The Enrollee shall specify whether they own and maintain service laterals, and the portion(s) owned and/or maintained including pipe, clean-outs, and backflow prevention devices. Any policies and procedures related to requirements for sewer easements shall also be addressed in this section. Section establishes ownership requirements for service laterals. Last Update: City of San Mateo SSMP Element 3: LEGAL AUTHORITY

30 LEGAL AUTHORITY PRIVATE SEWER LATERALS. (a) Sewer Lateral Responsibility for Repair, Replacement and Maintenance. The owner of the property(ies) serviced shall be responsible for any portion of the private sewer lateral extending from a building to the public sewer main, including the wye connection which joins the private sewer lateral to the public sewer main. Any repairs, replacement or maintenance, such as the clearing of pipes using common industry hydro or mechanical cleaning tools, will not be provided by the City on private sewer laterals or in private sewer systems. Responsibility for such repairs, replacement and maintenance is that of the owner of the property(ies) serviced by the lateral. (b) Mandatory Installation of Cleanout. When installing or replacing a sewer lateral connection from a building to the public main sewer, if not already present, the property owner shall install a cleanout near the property structure in accordance with the requirements of the Uniform Building Code, the California Plumbing Code, and any other applicable regulations adopted by the City, City standards, or plans and specifications approved by the City Engineer. (Ord , 2011). 3.3 SEWER USE FEES 3.54 Sewer Service Charges Every parcel of land within the City of San Mateo connected to the sewer collection system by a service lateral is charged a sewer service fee for the privilege to use the system and to fund the operations and maintenance of the sewer collection system. Fees are based on winter water usage and base sewer service charge rates are reviewed and adopted by City Council annually through the Ordinance process. Appendix 3.2 provides further information on the rate structure and fee calculations. 3.4 APPENDIX 3 SUPPORTING DOCUMENTS FOR ELEMENT 3 Appendix 3.1 Sewer Use Code Chapter 7.38 of the Municipal Code Appendix 3.2 Sewer Use Fees Chapter 3.54 of the Municipal Code Appendix 3.3a Estero Owner Agreement Appendix 3.3b Minor Partners Agreement Appendix 3.3c City of Belmont Agreement Last Update: City of San Mateo SSMP Element 3: LEGAL AUTHORITY

31 OPERATIONS AND MAINTENANCE PROGRAM ELEMENT 4: OPERATIONS AND MAINTENANCE PROGRAM SWRCB Waste Discharge Requirement: The Sewer System Management Plan (SSMP) must include those elements listed below that are appropriate and applicable to the Enrollee s system Maintain an up-to-date map of the sanitary sewer system, showing all gravity line segments and manholes, pumping facilities, pressure pipes and valves, and applicable stormwater conveyance facilities; Describe routine preventive operation and maintenance activities by staff and contractors, including a system for scheduling regular maintenance and cleaning of the sanitary sewer system with more frequent cleaning and maintenance targeted at known problem areas. The Preventative Maintenance (PM) program should have a system to document scheduled and conducted activities, such as work orders; Develop a rehabilitation and replacement plan to identify and prioritize system deficiencies and implement short-term and long-term rehabilitation actions to address each deficiency. The program should include regular visual and TV inspections of manholes and sewer pipes, and a system for ranking the condition of sewer pipes and scheduling rehabilitation. Rehabilitation and replacement should focus on sewer pipes that are at risk of collapse or prone to more frequent blockages due to pipe defects. Finally, the rehabilitation and replacement plan should include a capital improvement plan that addresses proper management and protection of the infrastructure assets. The plan shall include a time schedule for implementing the short- and long-term plans plus a schedule for developing the funds needed for the capital improvement plan; Provide training on a regular basis for staff in sanitary sewer system operations and maintenance, and require contractors to be appropriately trained; and Provide equipment and replacement part inventories, including identification of critical replacement parts. 4.1 COLLECTION SYSTEM MAPS AND INFORMATION Information Management The Department of Public Works strives to maintain accurate electronic records of our inventory of sewer assets as well as all work performed on those assets. This section describes the software programs utilized to maintain this information. A.i AutoCAD Utility Underground Map Books AutoCAD (CAD) is the graphics program used for construction design work and to print citywide underground utility map books. Map books are hard-bound sets of over 285 map tiles that display parcels and streets along with sewer and storm assets. Each sewer and storm maintenance vehicle carries a citywide underground map book. Maps are Last Update: City of San Mateo SSMP Element 4: OPERATIONS AND MAINTENANCE PROGRAM

32 OPERATIONS AND MAINTENANCE PROGRAM referenced for maintenance activities as well as for determining how storm drainage networks can be blocked in the event of a sewage spill. A sample page from the underground map book is attached in Appendix 4.10 Exhibit 4.10.A.i. AutoCAD Sewer Layer Structure Sanitary sewer collection system information is maintained in a Master AutoCAD sewer file (Sewer.dwg). This drawing file contains the following layers: SS-MANHOLES: SS-MAINLINES: SS-LATERALS: SS-PUMPSTATIONS: Point features identifying the location of sewer manholes, abandoned manholes, clean-outs, wetwells, valves and plugs Line features identifying the location of sewer mainlines, forcemains, and abandoned gravity mainlines and forcemains Line features representing sewer service lines Polygon features identifying the location of sewer pumping station buildings In AutoCAD, information pertaining to sewer features (such as manhole number, rim and invert elevations, mainline size and length) is displayed as text annotation layers. CAD feature layers (non-text layers) are exported into an ArcSDE Geodatabase (geodatabase) as GIS feature classes. In GIS, these features have the CAD text information stored as data in layers attribute tables along with other pertinent data. A.ii GIS Computer Mapping Program GIS is a computer mapping system that links graphic features on a map to databases of related information. The City has converted all of its sanitary sewer assets into a GIS system. While AutoCAD is used primarily for design work, GIS is utilized for storage/retrieval of asset information. Maps created using GIS ArcView software are attached in Appendix 4.10 (Exhibit 4.1.A.ii 4.1.A.vii). ArcSDE Sewer Layer (Feature Class) Structure Sanitary sewer collection system information is maintained in an ArcSDE Geodatabase that contains the following sewer GIS layers and attribute data: SS-MANHOLES: SS-MAINLINES: Point features identifying the location of sewer manholes, abandoned manholes, clean- outs, wet-wells, valves and plugs Line features identifying the location of sewer gravity mainlines, forcemains, and abandoned gravity mainlines and forcemains In 2011, in preparation for sharing GIS information with CCTV contractors, staff added upstream and downstream manhole numbers as separate fields, added upstream manhole address, use of sewer, owner and pipe shape to the SS_MAINLINES layer. SS-LATERALS: Line features representing sewer service lines - not an exact representation of the location of the lateral in the field but a Last Update: City of San Mateo SSMP Element 4: OPERATIONS AND MAINTENANCE PROGRAM

33 OPERATIONS AND MAINTENANCE PROGRAM SS-PUMPSTATIONS: SS-BASINS: SS-SUBBASINS: SS-CLEANINGAREAS: line providing linkage between the parcels, with ownership information, and the receiving sewer mainline Polygon features identifying the location of sewer pumping station buildings, as well as data regarding wet wells, pumps and maintenance information Polygon layer for the City s five major sewer basins Polygon layer outlining small sub-sections within each sewer basin Polygons further dissecting sub-basins. Cleaning areas identify how flow is carried from peripheral lines to major trunklines to help maintenance crews plan cleaning of the pipe networks. Polygons are snapped to the outside boundaries of parcels served at each small network to identify property owners within each cleaning area A.iii CMMS Azteca s Cityworks The City utilizes Azteca s Cityworks computerized maintenance management (CMMS)/asset management system for planning and scheduling preventative maintenance work and for tracking maintenance history on sewer assets. This GIS-based application provides access to information pertinent to each asset (pipe diameter, length, material, etc.) as well as to maintenance activities (work orders), resident complaints and requests for work (service requests). The primary functions of the Azteca Asset Management Program are: Maintain service request and maintenance history for each collection system asset Produce regularly updated maintenance schedules based on feedback from the operators Generate reports that support data analysis and decision making Provide documentation for use in regulatory compliance reporting Record line segments or structures that may be candidates for replacement or rehabilitation under the capital improvement program The CMMS program functions with the maintenance of key fields throughout GIS Layers. Key Fields: HANDLE CAD Handles are unique alpha-numeric character strings automatically assigned by CAD to each map feature in a drawing file. Public Works uses this unique identifier (ID) to maintain linkages between CAD graphical elements and geodatabase records LEGACYID A Cityworks required field (20 characters). This field contains asset feature ID s (i.e. Manhole #s or Sewer Mainline ID s, which are the alpha-numeric upstream manhole # followed by the alpha-numeric downstream manhole #) Last Update: City of San Mateo SSMP Element 4: OPERATIONS AND MAINTENANCE PROGRAM

34 OPERATIONS AND MAINTENANCE PROGRAM FACILITYID A Cityworks required field (20 characters) that is no longer used. Originally, feature classes in the geodatabase had a FacilityID populated using a concatenation of letters ( SS for sanitary sewer, SD for storm drainage) plus the CAD Handle. However, since this time, the FacilityID has been replaced with the all-numeric manhole # s and for mainlines, the all-numeric upstream manhole number and all-numeric downstream manhole #. LOCATION A Cityworks required field (100 characters). This field is populated with an associated address or nearest address/intersection. CONDITION & CONDITIONDATE Cityworks required fields (30 characters & a date field). This field is populated with the overall condition index rating following CCTV inspection of a mainline or inspection of a manhole (utilizing the NASSCO coding systems) along with the date on which the inspection was performed WARRANTYDATE - A Cityworks required field (date field). This field is populated when new assets are installed and have manufacture warranty periods Map Update and Maintenance Procedures Updating of sewer collection system maps is coordinated through the Engineering Technician assigned to the Asset Management Project Manager. The following actions are part of the program. - Field personnel note discrepancies or errors on field maps. Mark ups are submitted to the Engineering Technician and Project Manager for verification and map updates. When required, the master underground utilities AutoCAD map is modified and updated underground utilities map book pages are distributed. AutoCAD updates are transferred to the GIS system, attribute information is updated and associated maps (Sewer Cleaning District Maps, etc.) are re-printed reflecting new information. With the purchase of POSM CCTV inspection software in 2012, the Project Manager can more readily identify and correct inaccuracies in the electronic versions of the sewer collection system as manholes are found and mainline lengths verified through CCTV. - In-house AutoCAD (CAD) drawings for all capital improvement and system rehabilitation projects are sent to the Engineering Technician as part of project close-out. The master underground utilities AutoCAD map is modified and updated underground utilities map book pages are distributed. The Project Manager transfers the AutoCAD updates into the GIS system and updates GIS layer attribute information. Associated maps (Sewer Cleaning District Maps, etc.) are re-printed reflecting new information and capital improvement details are entered in the Cityworks CMMS system. - Developers submit as-builts of final sewer system construction to the City Engineer. These mark ups are submitted to the Engineering Technician for map updates. The master underground utilities AutoCAD map is modified and updated underground utilities map book pages are distributed. AutoCAD updates are transferred to the GIS system, attribute information is updated and Last Update: City of San Mateo SSMP Element 4: OPERATIONS AND MAINTENANCE PROGRAM

35 OPERATIONS AND MAINTENANCE PROGRAM CAD STANDARDS associated maps (Sewer Cleaning District Maps, etc.) are re-printed reflecting new information. Improvement details are entered in the Cityworks CMMS system. To ensure that all plan information, both generated within the Department and developed by consultants or private owners can be seamlessly incorporated into electronic maps, staff developed a set of AutoCAD standards. The standards condition AutoCAD work to be performed utilizing a copy of the AutoCAD project file legend.dwg. This drawing file and associated plot style table files contain standardized map layer attributes, legend, and title blocks for submitting project plans & profiles. The CAD Standards document can be found in Appendix 4.1 of this document. The Engineering Technician performing edits to the master AutoCAD underground utility map files (e.g. the Sewer.dwg file located in the Q\PW\PWENG\MASTER CAD folder) follow editing rules that are maintained along with the CAD standards, see Appendix 4.1 for a list of editing rules. 4.2 PREVENTIVE OPERATIONS AND MAINTENANCE Overview The Sewer Operations and Maintenance Section (Sewer Maintenance) implements several maintenance approaches for the sewer collection system. Citywide mainline cleanings, ongoing preventative maintenance of problem areas, use of closed circuit camera inspections (CCTV) of mainlines, along with coordination with sewer engineering efforts and activities to minimize FOG entering the collection system all support the goals and objectives of Sewer Maintenance. Sewer Maintenance is responsible for these collection system management goals: 1. Properly maintain, operate and manage the wastewater collection system. 2. Provide adequate capacity in the collection system to convey peak flows. 3. Minimize the frequency of sanitary sewer overflows (SSOs). 4. Mitigate the impact of SSOs. Summary objectives of Sewer Maintenance Preventative Maintenance Program include: 1. Reduce SSOs through cleaning, video condition assessment, root control, and post-sso analysis/evaluation. 2. Identify collection system blockages due to fats, oil and grease (FOG) and develop strategies to decrease backups. Last Update: City of San Mateo SSMP Element 4: OPERATIONS AND MAINTENANCE PROGRAM

36 OPERATIONS AND MAINTENANCE PROGRAM 3. Operate pump stations at peak efficiency and perform scheduled preventive maintenance. 4. Maintain records of the sanitary sewer system and respond to inquiries. 5. Assist with the development of a capital improvement program directed at maintaining the current sewer assets, improving system reliability and providing adequate future capacity. Tables listing the equipment and personnel dedicated to maintenance of the sewer collection system can be found in Appendix 4.8 of this document Citywide Sewer District Cleaning One goal of the Sewer Division is to clean every sewer mainline within an identified required time period. A system has been developed to schedule and track these efforts, and to document the problems found in the system. The collection system is divided into five major sewer basins and then further divided into subbasins that identify how pipe networks converge into trunk lines and flow is carried to the wastewater treatment plant. Basin and subbasin boundaries were created in a GIS program and are currently stored as GIS layers. Snapshots of the layers are shown below. BASINS SUBBASINS Staff uses information from the overall collection system basin map, previous cleaning results, terrain of the city, crew knowledge, and the history of logged calls, to develop a cleaning frequency for each collection system basin. Cleaning crews focus on one basin each year as part of a 5 year routine cleaning cycle. Cleaning for pipes that are 24-inch and larger are contracted out by the City and are cleaned once every 10 years. The order of pipe cleaning is shown below. Last Update: City of San Mateo SSMP Element 4: OPERATIONS AND MAINTENANCE PROGRAM

37 OPERATIONS AND MAINTENANCE PROGRAM Order by basin cleaning: 1. Basin E 2. Basin A 3. Basin D 4. Basin C 5. Basin B The cleaning frequencies are dynamic and cleaning map is updated and maintained by City staff. The cleaning maps follow flow so that crews can clean outlying pipes and work down as mainlines converges into trunk lines. Individual cleaning area maps are utilized to manage crew activities. These maps provide space for crews to note the dates, time spent, vehicles used, type of cleaning performed (jet, powerrod, hydrosaw, etc.) and the names of the operators as well as document the problem found in each pipe segment. A snapshot of this map is shown below. SAMPLE CLEANING AREA MAP 2011 PROGRAM UPDATES In 2011, sewer maintenance crews (crews) incorporated cleaning of larger pipes into the preventive maintenance program. Crews purchased and were trained on equipment used to clean the larger lines. During 2011, in addition to regularly-planned cleaning, crews cleaned all pipes with diameters of 14- to 21-inches. Last Update: City of San Mateo SSMP Element 4: OPERATIONS AND MAINTENANCE PROGRAM