Sewer System Management Plan 2014 Update
Sewer SystemManagement Plan2014 UpdateActivities to Manage the Wastewater CollectionSystem EffectivelyCity of Milpitas455 East Calaveras Blvd.Milpitas, CA 95035www.Milpitas.ca.gov(408) 586-3000
Sewer SystemManagement Plan2014 UpdateRevised by City of MilpitasUtility Engineering StaffApproved by Milpitas City Council on August 18, 2009Updated June 2014City of Milpitas455 East Calaveras Blvd.Milpitas, CA 95035www.Milpitas.ca.gov(408) 586-3000ii
Sewer System Management PlanCity of MilpitasCertificate of ComplianceThis certification is included to ensure compliance with the State Water Resource Control Board, GeneralOrder 2006-0003-DWQ and Order No. WQ 2013-0058-EXEC.I certify under penalty of law that this document and all attachments were prepared under my direction orsupervision. The information submitted is to the best of my knowledge and belief, true, accurate, andcomplete.Name:Jeff MonedaTitle: Public Works Director/City EngineerDate:
TABLE OF CONTENTSElement 1Goals1Element 2Organization32.1Roles & Responsibilities32.2Chain of Communication: SSO Reporting7Element 3Legal Authority9Element 4Operation & Maintenance Program104.1Collection System Maps114.2Preventative Maintenance114.3Rehabilitation & Replacement Plan124.4Training Schedule144.5Contingency Equipment & Replacement Inventories14Element 5Design & Performance Provisions15Element 6Overflow Emergency Response Plan16Element 7FOG Control Program297.1Outreach307.2FOG Disposal307.3Legal Authority307.4Grease Removal Devices317.5Restaurant Inspections317.6Sanitary Sewer System FOG Blockages327.7FOG Source Control Measures32Element 8System Evaluation and Capacity Assurance Plan338.1Capacity Assessment338.2Capacity Enhancement Measures348.3System Evaluation & Capacity Assurance Plan348.4Schedule of Completion35i
Element 9Monitoring, Measurement & Program Modification369.1SSMP Activity Prioritization369.2Implementation & Effectiveness379.3Assessment of Preventive Maintenance Program379.4Program Updates379.5Trends: Frequency, Location & Volume37Element 10SSMP Program Audits39Element 11Communication Program40AppendicesAppendix AState Water Resource Control Board General Order 2006-0003-DWQ &Order No. WQ 2013-0058-EXECAppendix BUtility Maintenance Standard Operating Procedures: SSO Responding & ReportingAppendix CABAG Sanitary Sewer Overflow and Backup Response Plan - DRAFTAppendix DMilpitas Municipal Code ExcerptsAppendix ESanitary Sewer System MapAppendix FSanitary Sewer Pipe Ages MapAppendix GSanitary Sewer Pipe Materials MapAppendix HStorm Drain Facilities MapAppendix IFive-Year Capital Improvement ProgramAppendix JExcerpt from City of Milpitas Engineering Plans and Map Procedures and GuidelinesAppendix KExcerpt from City of Milpitas Standard Specifications for Sanitary SewersAppendix LExcerpt from City of Milpitas Standard DrawingsAppendix MAudit RecordAppendix NEquipment-Material Vendor ListAppendix OSSO Location MapAppendix PPreventative Maintenance LogAppendix QMilpitas Manhole Flowrate ChartTables and FiguresTable 2-1: City SSO Contact List6Table 2-2: SSMP Elements & Responsibilities7Table 9-1: Causes of SSOs, 2009 - 201338Figure 2-1: SSMP Organization Flowchart5Figure 2-2: SSO Chain of Communication Flow Chart8Figure 9-1: Annual Volume of SSOs, 2009 -201338ii
ABBREVIATIONSABAGAssociation of Bay Area GovernmentsBACWABay Area Clean Water AgenciesBAWQABay Area Water Quality AssociationBMPBest Management PracticeCACaliforniaCCTVClosed-Circuit TelevisingCal OESCalifornia Office of Emergency ServicesCIPCapital Improvement ProgramCIWQSCalifornia Integrated Water Quality SystemCWEACalifornia Water Environment AssociationDES(San Jose) Department of Environmental ServicesFOGFat, Oils, and GreaseGISGeographical Information SystemGRDGrease Removal DeviceGWDRGeneral Waste Discharge RequirementsI/IInflow/InfiltrationLROLegally Responsible OfficialMRPMonitoring & Reporting ProgramNOINotice of IntentNPDESNational Pollution Discharge Elimination SystemsRWQCBSan Francisco Bay Regional Water Quality Control BoardSCADASupervisory Control and Data AcquisitionSOPStandard Operating ProcedureSSMPSewer System Management Planiii
SSOSanitary Sewer OverflowSWRCBState Water Resources Control BoardUSUnited StatesWARNWater Agency Response NetworkWDRWater Discharge RequirementsWPCPSan Jose/Santa Clara Water Pollution Control Plantiv
GLOSSARYBay Area Clean Water Agencies(BACWA)The San Francisco Bay Area Joint Powers Authority is comprised of wastewater treatmentand collection system agencies. The BACWA vision is to: Develop a region-wideunderstanding of the watershed protection and enhancement needs through reliance onsound scientific, environmental and economic information, and ensure that thisunderstanding leads to long-term stewardship of the San Francisco Bay Estuary.BlockageA build up of debris in the sewer that stops the flow of wastewater and allows the water toback up behind the blockage, sometimes causing an overflow. Also called a stoppage.CityThe City of Milpitas.Geographical Information System(GIS)A database linked with mapping, which includes various layers of information used bygovernment officials. Examples of information found on a GIS can include a sewer map;sewer features such as pipe location, diameter, material, condition, last date cleaned orrepaired. The GIS also typically contains base information such as streets and parcels.Inflow/Infiltration (I/I)Inflow is generally considered to be extraneous water that enters the system as a direct resultof a rain event, such as through improper connections to the sanitary sewer, through floodedmanhole covers, or through defects in the sewer. Infiltration is generally considered to beextraneous water that enters the sewer system over longer periods of time, such asgroundwater seepage through cracks in the sewer. While it is impossible to control all I/I, itis certainly desirable to reduce I/I when cost-effective.LateralThe portion of sewer that connects a home or business with the main line in the street.Laterals are owned and maintained by the property owner.Legally Responsible Official(LRO)The Legally Responsible Official is responsible for reporting all spills to the applicableregulatory agencies within the prescribed timelines.LegaRegional Water Quality ControlBoard (RWQCB)The San Francisco Bay Regional Water Quality Control Board (also known as RWQCB). Itsmission is to preserve, enhance and restore the quality of California’s water resources, andensure their proper allocation and efficient use for the benefit of present and futuregenerations.Sanitary Sewer Overflow (SSO)Any overflow, spill, release, discharge or diversion of untreated or partially treatedwastewater from a sanitary sewer system. SSOs include:Overflows or releases of untreated or partially treated wastewater that reach waters ofthe United States;Overflows or releases of untreated or partially treated wastewater that do not reachwaters of the United States; andWastewater backups into buildings and on private property that are caused by blockagesor flow conditions within the publicly owned portion of a sanitary sewer system.State Water Resource ControlBoard (SWRCB)The umbrella agency responsible for implementation of State laws.v
1GOALSElement1SWRCB Requirements:The goal of the SSMP is to provide a plan and schedule to properly manage, operate, and maintain allparts of the sanitary sewer collection system. This will help reduce and prevent SSOs, as wells as mitigateany SSOs that do occur.RWQCB Requirements:Each wastewater collection system agency shall, at a minimum, develop goals for the Sewer SystemManagement Plan as follows: To properly manage, operate, and maintain all parts of the wastewater collection system To provide adequate capacity to convey peak flows To minimize the frequency of SSOs To mitigate the impact of SSOsThe City of Milpitas is located in northeastern Santa Clara County between the Cities of San Jose andFremont. It comprises 13 square miles of residential, commercial, industrial, agricultural and recreational landuses, roughly oriented around the intersections of SR 237 with I-880 on the west and I-680 on the east. It hasa residential population of just over 70,000 and hosts a number of High Tech electronic research,development and manufacturing facilities typical of the Silicon Valley.The City of Milpitas owns and operates its municipal sewer collection system consisting of 175 miles ofgravity pipe and 5 miles of force main. The system also includes two pump stations: the Venus Station whichlifts sewer out of a low-lying Pines neighborhood and the Main Sewer Pump Station which pumps all Citysewage through dual 2.5 mile force mains to the San Jose/Santa Clara Water Pollution Control Plant (WPCP)located in San Jose at 700 Los Esteros Road for treatment.The City of Milpitas has prepared this Sewer System Management Plan (SSMP) to comply with the StateWater Resource Control Board (SWRCB) General Order 2006-0003-DWQ and WQ 2013-0058-EXEC. (seeAppendix A). The SSMP provides a plan and schedule to properly manage, operate, and maintain allcomponents of the municipal sanitary sewer system. Since the City has proactively planned for adequatecapacity and performed aggressive preventive maintenance over the past several years, it already has a lowincidence rate of sanitary sewer overflows (SSOs), averaging approximately two incidences per year, withthree SSOs in 2009, zero in 2010, one in 2011, four in 2012 and two 2013. This SSMP documents pastactivities and provides guidance to maintain a low SSO rate, as well as mitigate any SSOs that do occur.The provisions of the SSMP were developed and updated to ensure that the City is able to meet its goals by: Implementing a collection system maintenance program to minimize the frequency of sanitary seweroverflows.Respond to sanitary sewer overflows quickly and mitigate the impact of the SSO.Mitigating the impact of sewer overflows that do occur as well as follow up investigations to identify thecause of the overflow event and using that information to either adjust the maintenance schedule orschedule a repair/replacement.1
Properly manage, operate and maintain all elements of the wastewater collection system to better allocateresources and manpower.Develop and maintain design construction standards and specifications for the installation and repair ofthe collection system and its associated infrastructure.Maintain comprehensive and up-to-date maps of the wastewater collection system.Provide training on a regular basis for staff in collection system maintenance and operations.Maintain a Fats, Oils, and Grease (FOG) program to limit fats, oils, and grease, and other debris thatmay cause blockages in the sewage collection system.Develop a closed-circuit televising (CCTV) program for the collection system.The City has implemented policies and procedures for the systematic inspection and continued maintenance ofits infrastructure. The City personnel are utilizing the procedural training available through organizations such asBay Area Water Quality Association (BAWQA) and California Water Environment Association (CWEA).2
22.1ORGANIZATIONSSMP Roles & ResponsibilitiesElement2SWRCB Requirements:SSMP must identify:A. Name of the responsible or authorized representative as described in section J (pg. 19) of thisorder;B. Names & numbers for management, administrative, and maintenance positions responsible forimplementing specific measures of SSMP. SSMP must identify lines of authority through anorganization chart or similar document with a narrative explanation; andC The chain of communication for reporting SSOs, from receipt of a complaint or otherinformation, including the person responsible for reporting SSOs to the Health and RegionalWater Board and other agencies if applicable (such as County Health Officer, CountyEnvironmental Health Agency, Regional Water Board, and/or Cal OES.RWQCB Requirements:Each wastewater collection system agency shall, at a minimum, provide information regardingorganization Identify agency staff responsible for implementing, managing, and updating the SSMP Identify chain of communication for responding to SSOs Identify chain of communication for reporting SSOsThe Public Works Director/City Engineer, Principal Utility Engineer, and Public Works Manager, all with theCity of Milpitas Department of Public Works, are authorized to serve as Legally Responsible Officials (LROs)for the purposes of certifying the component of this plan and for reporting SSOs in the California IntegratedWater Quality System electronic database.Figure 2-1 shows the City’s organization chart and City staff who manage all sanitary sewer activities withinthe City, whether it be reporting SSOs, analyzing capacities of the sanitary sewer system, or maintainingsanitary sewer facilities.City Council – Approves operating budgets and capital improvement program enters agreements on behalf ofthe City.City Manager – City’s executive officer. Oversees and coordinates works of all departments.City Attorney – City’s legal counsel. Advises on content of sewer ordinances, coordinates ordinanceadoption, provides legal interpretations, and serves in enforcement actions.Public Works Director/City Engineer (Contingent LRO) – Establishes sewer system plans strategy, leads andassigns duties of engineering staff, prepares budgets and serves as the spokesperson for SSO related events.(See section 2.2: Chain of Communication: SSO Reporting).3
Principal Utility Engineer (Secondary LRO) – Oversees and prepares wastewater collection system planningdocuments, documents new and rehabilitated assets, proposes rate analysis reports and staffrecommendations, and coordinates development and implementation of SSMP.Public Works Manager (Primary LRO) – Manages field operations and maintenance activities, providesrelevant information to management, prepares and implements contingency plans, leads emergency response,investigates and reports SSOs, and trains field crews. (See section 2.2: Chain of Communication: SSOReporting).Public Works Maintenance Crew/Standby Crew – Perform preventive maintenance activities, mobilize andrespond to notification of stoppages and SSOs (mobilize sewer cleaning equipment, by-pass pumpingequipment, and portable generators).WPCP – Provides pre-treatment program inspection and permitting to ensure compliance of the WPCPoperations with its NPDES discharge permit.4
Figure 2-1: SSMP Organization FlowchartCity CouncilCity ManagerPublic WorksDirector/City Engineer(Contingent LRO)Fire ChiefDPW rDesign &ConstructionEngineeringWPCPPretreatmentInspection &PermitsCity AttorneyPrincipal Utility Engineer(Secondary LRO)Public Works Manager(Primary LRO)Public WorksMaintenanceCrew/Standby CrewDispatchFireAdministrationFire MarshalFire PreventionServicesPolice municationsDispatcherAssistant ChiefEmergencyResponse ServicesFirefighters &Paramedics5
Table 2-1: City SSO Contact ListNamesPublic Works Call CenterGlen Campi,Public WorksManager(Primary LRO)Steven MachidaPrincipal Utility Engineer(Secondary LRO)Jeff Moneda,Public WorksDirector/City Engineer(Contingent LRO)Public Works MaintenanceCrew/Standby Crew PagerBusiness Hours408-586-2600After Hours(8:00 a.m. – 5:00 p.m.)911 -27256
The Principal Utility Engineer has primary responsibility for the SSMP to ensure it is current. The PrincipalUtility Engineer and Public Works Manager are responsible for implementation of various elements withinthis SSMP as delineated in Table 2-2 below.Table 2-2: SSMP Elements & Responsibilities GoalsOrganizationLegal AuthorityOperations and MaintenanceProgramDesign and PerformanceProvisionsOverflow Emergency ResponsePlanFOG (Fats, Oils, Grease) ControlProgramSystem Evaluation and CapacityAssurance PlanMonitoring, Measurement, andPlan ModificationsSSMP AuditsCommunication Program2.2SSMPChp.123PrincipalUtilityEngineer 45Public WorksManager 67 8 9 1011 Chain of Communication: SSO ReportingThe SSMP must identify:C. Chain of communication for reporting SSOs, from receipt of complaint or other information,including persons responsible for reporting SSO to the State and Regional. Water Board and otheragencies if applicable (such as County Health, County Environmental Health Agency, Reg. WaterBoard &/or Cal OES).SSO reports are routed to the City’s Public Works call center during normal business hours. After hoursreporting comes through the City’s 9-1-1 emergency system. The Utility Maintenance Standard OperatingProcedures (SOP) (Appendix B) describes roles and responsibilities of City personnel when responding to,and reporting SSOs. The Public Works Maintenance crew is using the Association of Bay Area Governments(ABAG) Overflow and Back-up Response Plan (Appendix C), which incorporates the City’s SSO ResponseSOP, for detailed response and clean-up guidelines for sanitary sewer overflows. This plan identifies the chainof communication for responding to, and reporting SSOs. The Public Works Manager has primary7
responsibility to insure that the City responds appropriately and all reports to all regulatory agencies are madewithin the pre-designated timeline. The table of contents and selected excerpts from the ABAG Overflowand Back-up Response Plan are included in Appendix C and are discussed in Element 6. Figure 2-2 identifiesthe City’s Chain of Communication in the event of an SSO. Information on notification of outside agencies isshown in Appendix B.Figure 2-2: SSO Chain of Communication Flow ChartReport of SSOPublic Works Call Center (business hours) or MilpitasPolice Department 911 (after hours)Public Works Maintenance Crew/ StandbyCrew*Public Works Manager (Primary LRO)Principal UtilityEngineer(Secondary LRO)Public WorksDirector/CityEngineer(Contingent LRO)City ManagerCal OESState WaterResource ControlBoardS.F. Regional WaterQuality Control BoardFish & WildlifeSanta Clara CountyEnvironmental HealthDepartment*The Public Works Manager has primary responsibility to make the electronic reports of SSOs to CIWQSwithin the State’s reporting timeline. These are within 2 hours, or as soon as practicable without impedingthe SSO response for a Category 1 or 2 spill of any amount reaching surface waters or 1,000 gallons or greaterthat does not reach surface waters, respectively If less than 1,000 gallons and fully captured, reporting mustbe certified within 30 days after the end of the calendar month in which the SSO occurs. In the Public WorksManager’s absence, the Principal Utility Engineer will make the necessary reports, or if both staff are absent,the Public Works Director/City Engineer will make the reports. In the event the SSO cannot be reportedonline, the reporting LRO is to submit via fax. Fax information can be found in the SSO Response Envelope.8
Responsibility for SSMP Implementation The Public Works Manager is responsible for developing,implementing, and maintaining all elements of the City’s SSMP.9
3LEGAL AUTHORITYElement3The City has enrolled in the State’s general sanitary sewer overflow program for itssewer collection system as required by Order 2006-0003-DWQ and WQ 2013-0058EXEC (see Appendix A). Use of the City’s sanitary sewer system is regulated by theMilpitas Municipal Code, Title VIII, Chapter 2 (see Appendix D), which is sufficientto comply with the General Order. The Principal Utility Engineer is responsible to establish design criteria,and implement and enforce use regulations.SWRCB Requirements:Demonstrate, through sanitary sewer system use ordinances, service agreements, or other legally bindingprocedures, that it possesses the necessary legal authori
9.5 Trends: Frequency, Location & Volume 37 Element 10 SSMP Program Audits 39 Element 11 Communication Program 40 Appendices Appendix A State Water Resource Control Board General Order 2006-0003-DWQ & Order No. WQ 2013-0058-EXEC Appendix B Utility Maintenance Standard Operating Procedures: SSO Responding & Reporting
SECTION 6: SANITARY SEWER SERVICE LINES 6.1 Scope SEWER-26 6.2 Quality Assurance SEWER-26 6.3 Job Conditions SEWER-26 6.4 Pipe SEWER-26 6.5 Flexible Couplings SEWER-27 6.6 General SEWER-27 6.7 Trenching, Backfilling and Compaction SEWER-27 6.8 Taps SEWER-27
1 Introduction: There are two types of public sewer systems used in the United States for collecting and conveying sanitary sewage, combined sewer systems (CSS) and sanitary sewer systems (SSS). Combined sewer systems collect and convey sanitary sewage and urban runoff in a common piping system.
2.Tysons West Pump Station, Force Main, and gravity sewer 115.4M 3.Enlarge Accotink Interceptor from 30" sewer to 42" 33.0M 4.Lakevale sewer project 2.2M 5.Enlarge 12" sewer to 18" sewer in Merrifield 2.3M 6.Enlarge and relocate gravity sewers along Route 1 BRT 29.5M Project in Construction: Upsize Alexandria Renew line 58/615M
Sewer Processes and Design Bimlesh Kumar E-mail: bimk@iitg.ernet.in. Department of Civil Engineering Indian Institute of Technology Guwahati Introduction Sewer System Fundamental Hydrology for Sewer Design Fundamental Hydraulics for Sewer Design. Department of Civil Engineering
37. Sewer, Collector - A line that receives wastewater directly from property sewer laterals and transports the wastewater to tmnk sewers. 38. Sewer, Lateral - A line from a single user to the collector sewer. A lateral is a sewer that has no other common sewers discharging into it. 39
CITY OF HAYWARD BUILDING SEWER MAINTENANCE The City of Hayward does not service lateral sewers. The City will check the sewer main if a plumber or Roto-Rooter service verifies that the sewer main (Public Sewer, see Municipal Code Section 11-3.000 bb) is plugged or causing the stoppage.
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What is a Combined Sewer Overflow (CSO)? NYC’s sewer system is approximately 60% combined, which means it is used to convey both sanitary and storm flows. When the sewer system is at full capacity, a mixture of rain water and sewage may be released into local waterways. This is called a combined sewer overflo
