Sewer System Management Plan

Transcription

1 Sewer System Management Plan University of California, Davis April 2018

2 Sewer System Management Plan University of California, Davis Waste Discharge ID: 5SSO11071 Original SSMP Adoption Date: June 10, 2009 Prepared By: UC Davis Facilities Management, Utilities Division Courtney Hall Associate Civil Engineer Brad Butterfield Wastewater Superintendent Mike Fan Director

3 TABLE OF CONTENTS INTRODUCTION... 1 REGULATORY BACKGROUND... 1 SYSTEM DESCRIPTION GOAL ORGANIZATION... 8 ORGANIZATIONAL STRUCTURE SSMP Responsibility... 9 MONITORING SYSTEM AND REPORTING SSOS LEGAL AUTHORITY OPERATION AND MAINTENANCE PROGRAM COLLECTION SYSTEM MAPS PREVENTATIVE MAINTENANCE PROGRAM REHABILITATION AND REPLACEMENT TRAINING EQUIPMENT AND REPLACEMENT PARTS INVENTORY DESIGN AND PERFORMANCE PROVISIONS STANDARDS FOR INSTALLATION, REHABILIATION AND REPAIR STANDARDS FOR INSPECTION AND TESTING OF NEW AND REHABILITATED FACILITIES OVERFLOW EMERGENCY RESPONSE PLAN SSO DETECTION AND NOTIFICATION FIRST RESPONDER ASSESSMENT OF SSO SSO CORRECTION, CONTAINMENT, AND CLEAN UP REGULATORY NOTIFICATION PROCEDURES WATER QUALITY SAMPLING PROCEDURES TRAINING REQUIREMENTS FOG CONTROL PROGRAM FOG CONTROL INFRASTRUCTURE FOG SOURCE CONTROL PROGRAM Public Education Outreach FOG Disposal Procedures Installation of New Grease Removal Devices Identification of FOG Blockages SYSTEM EVALUATION AND CAPACITY ASSURANCE PLAN MONITORING, MEASUREMENT, AND PROGRAM MODIFICATIONS PERFORMANCE MONITORING Baseline Performance Number of SSOs SEWER SYSTEM MANAGEMENT PLAN Page i

4 9.1.3 Cause of SSOs Spill Volume and Portion of SSOs Recovered SSMP PROGRAM AUDITS BIENNIAL AUDIT RECORD KEEPING COMMUNICATION PROGRAM COMMUNICATION PLAN SATELLITE SYSTEMS REFERENCES LIST OF FIGURES Figure I 1. Wastewater Collection System, Central Campus... 4 Figure I 2. Wastewater Collection System, South Campus... 5 Figure I 3. Wastewater Collection System, West Campus... 6 Figure 2 1. Administrative Responsibility for the Wastewater Collection System... 9 Figure 2 2. SSO Reporting Flow Chart Figure 6 1. SSO Reporting Procedures Figure 6 2. Water Quality Sampling Procedures Figure 7 1. Grease Interceptor Locations Figure 9 1. UC Davis versus State School Average SSO Rate Figure 9 2. Number of SSOs per Year by Location Figure 9 3. Number of SSOs per Year by Cause LIST OF TABLES Table I 1. Existing Wastewater Collection System Facilities... 2 Table I 2. Wastewater Lift Station Facilities... 2 Table I 3. Age of Wastewater Collection System Facilities... 3 Table 2 1. Administrative Responsibility for the SSMP... 9 Table 4 1. Equipment Inventory Table 7 1. Grease Interceptors Table 9 1. Spill Volume Recovered per SSO LIST OF APPENDICES Appendix A. SSMP Contact Information Appendix B. SSMP Audits Appendix C. SSMP Change Log SEWER SYSTEM MANAGEMENT PLAN Page ii

5 DEFININITIONS, ACRONYMS, AND ABBREVIATIONS ADWF ASUCD BMP BMS CCTV CIP CIWQS CM CS&DG DCM DS EH&S EPA FOG GIS I&I LS LRO MGD MRP NPDES O&M OERP OES PM RWQCB SCADA SSLS SSMP SSO Average dry weather flow Associated Students, University of California, Davis Best Management Practice UC Davis Building Maintenance Services Closed Circuit Television Capital Improvement Program California Integrated Water Quality System Refers to the State Water Resources Control Board online electronic reporting system that is used to report SSOs, certify completion of the SSMP, and provide information on the sanitary sewer system. Corrective maintenance Campus Standards and Design Guide UC Davis Design and Construction Management Data Submitter Refers to the person(s) designated by an agency to enter information for spills into CIWQS. UC Davis Environmental Health and Safety United States Environmental Protection Agency Fats, Oils, and Grease Geographic Information System Inflow & Infiltration Lift Station Legally Responsible Official Refers to the person(s) formally designated by an agency to be responsible for formal reporting and certifying of all reports submitted to CIWQS. Million gallons per day Monitoring and Reporting Program Refers to State Water Resources Control Board Executive Order No EXEC effective September 9, National Pollution Discharge Elimination System Operations and Maintenance Overflow Emergency Response Plan California State Office of Emergency Services Preventative Maintenance Regional Water Quality Control Board Refers to the Central Valley Regional Water Quality Control Board. Supervisory Control and Data Acquisition Sanitary Sewer Lift Station Sewer System Management Plan Sanitary Sewer Overflow Any overflow, spill, release, discharge or diversion of untreated or partially treated wastewater from a sanitary sewer system. Category 1 SSO: Discharges of untreated or partially treated wastewater of any volume that reach surface water, reach a discharge channel tributary to a surface SEWER SYSTEM MANAGEMENT PLAN Page iii

6 SWRCB TAPS UC Davis WDR WWCS WWTP water, or reach a storm drainage system and are not fully captured and disposed of properly. Category 2 SSO: Discharges of untreated or partially treated wastewater of 1,000 gallons or greater that do not reach surface water, a drainage channel, or storm drainage system unless the entire SSO discharged to the storm drain system is fully recovered. Category 3 SSO: All other discharges of untreated or partially treated wastewater. State Water Resources Control Board UC Davis Transportation and Parking Services University of California, Davis Waste Discharge Requirements Refers to the State Water Resources Control Board Order No DWQ, Statewide General Waste Discharge Requirements for Sanitary Sewer Systems, dated May 2, Wastewater Collection System Wastewater Treatment Plant SEWER SYSTEM MANAGEMENT PLAN Page iv

7 INTRODUCTION REGULATORY BACKGROUND UNIVERSITY OF CALIFORNIA, DAVIS This Sewer System Management Plan (SSMP) is required by the State Water Resources Control Board (SWRCB). The SWRCB requirements for the SSMP are outlined in Order No DWQ Statewide General Waste Discharge Requirements for Sanitary Sewer Systems and Order No EXEC (amended by Order No EXEC) which changed the Monitoring and Reporting Program. The Waste Discharge Requirements (WDR) stipulates that the permittees, which include the University of California, Davis (UC Davis), must develop and implement a Management Plan in order to reduce sanitary sewer overflows (SSOs). Additionally, the Management Plan provides measures to ensure efficient and effective response to SSOs and implementation of source control measures to minimize the introduction of grease and oils, and other materials that may cause blockages. This Management Plan satisfies the requirements specified in the WDR Order No DWQ. The SWRCB developed this WDR to promote uniformity in the management of California s wastewater collection systems and to reduce SSOs. The SWRCB found that municipal agencies or districts that have implemented SSMPs similar to this have been effective not only in improving spill reporting but also in mitigating SSO impacts. Data also supported the conclusion that better collection system management will benefit water quality and prolong the life of sanitary sewer systems. The SWRCB regulates SSOs based on authority provided by the federal Clean Water Act (EPA, 2002) and the Porter Cologne Water Quality Control Act, Section (California Water Code of Regulation, 2006). SYSTEM DESCRIPTION UC Davis is one of 10 University of California campuses governed by the Regents of the University of California and is an internationally recognized public teaching and research institution. The 5,300 acre campus is located adjacent to the City of Davis, CA in the counties of Yolo and Solano. The campus population includes approximately 33,800 students and 12,400 faculty and staff ( ). The UC Davis wastewater collection system (WWCS) consists of approximately 23 miles of gravity main lines, 24 miles of service laterals, and 5 miles of force mains as reported in the UC Davis Geographic Information System (GIS) database. A few areas of campus are served by on site septic disposal systems, almost all of which are located in west campus. The areas served by the UC Davis WWCS and the system layout are shown on Figure I 1, Figure I 2, and Figure I 3 for the Central Campus, South Campus, and West Campus areas, respectively. Wastewater from the UC Davis WWCS is conveyed to the UC Davis Wastewater Treatment Plant (WWTP). Average dry weather flow (ADWF) at the WWTP is typically 1.3 million gallons per day (MGD). Peak daily wet weather flow can be as high as 2.2 MGD during a 10 year, 24 hour storm event. The design capacity of the WWTP is 3.6 MGD ADWF and 9.4 MGD peak wet weather flow. Wastewater goes through advanced treatment prior to being used as recycled water on campus or discharged to North Putah Creek. UC Davis owns and maintains all sewer facilities, including upper and lower laterals, within the WWCS. A summary of total WWCS gravity mains, force mains, and laterals is provided in Table I 1. SEWER SYSTEM MANAGEMENT PLAN Page 1

8 Table I 1. Existing Wastewater Collection System Facilities Gravity Mains Force Mains Laterals Diameter Linear Feet Percent Linear Feet Percent Linear Feet Percent 6 inch or less 28, , , inch 45, , , inch to 18 inch 40, , , inch to 30 inch 6, , ,794 1 Greater than 30 inch Unknown ,648 5 Total, linear feet 121, , , Total, miles Of these WWCS facilities, there are a total of 2 pipes that cross the Arboretum Waterway. This includes a 4 inch gravity sewer lateral crossing at the Putah Creek Lodge pedestrian bridge and an 18 inch SSLS 9 force main crossing at the Putah Creek Lodge Drive maintenance road. There are 22 sanitary sewer lift stations (SSLS) in the UC Davis WWCS. These facilities range in size from small stations serving individual buildings to large stations serving major areas of the campus. The SSLS facilities and their installation year and capacity are summarized in Table I 2. All lift station locations are depicted in Figure I 1, Figure I 2, and Figure I 3. Table I 2. Wastewater Lift Station Facilities Lift Station Location Installation Year 1 Capacity, gpm SSLS 1 1 st Street at Child Development Center SSLS 2 California Ave. near Cruess Hall SSLS 3A Old Davis Rd. and California Ave SSLS 4 Regan Hall Courtyard SSLS 5B Activities & Recreation Center SSLS 6A Old Davis Rd. south of I SSLS 7A Old Davis Rd. south of RR tracks SSLS 8 Briggs Hall, NW of loading dock SSLS 9 La Rue Road at TES ,500 SSLS 10 Primate Center SSLS 11 Hopkins Road, NE of Bee Biology SSLS 12A Hutchison Drive west of Highway ,700 SSLS 13 South Hall, east side of building SSLS 16 Quad District Parking Structure, SE corner SEWER SYSTEM MANAGEMENT PLAN Page 2

9 Table I 2. Wastewater Lift Station Facilities Lift Station Location Installation Year 1 Capacity, gpm SSLS 17 University Airport SSLS 19 Swine Facility SSLS 22 WWTP Influent LS SSLS 24 Aggie Stadium SSLS 25 Animal Husbandry Feedlot SSLS 26 Gateway District Parking Structure SSLS 27 Equestrian Center SSLS XX Renewable Energy Anaerobic Digester (R.E.A.D) Installation year reflects major improvements and full replacements and may not be original installation. The age of the WWCS facilities varies from new to over 70 years old. The age of the gravity sewers, force mains, and lift stations are summarized in Table I 3. Table I 3. Age of Wastewater Collection System Facilities Gravity Mains Force Mains Lift Stations Lift Stations Installation Year Linear Feet Percent Linear Feet Percent ( 75,000 gpd) (< 75,000 gpd) 2000 to present 29, , to , , to , , to , to to Unknown 4, , Total, linear feet 121, , Total, miles Total, Count 18 4 SEWER SYSTEM MANAGEMENT PLAN Page 3

10 Figure I 1. Wastewater Collection System, Central Campus SEWER SYSTEM MANAGEMENT PLAN Page 4

11 Figure I 2. Wastewater Collection System, South Campus SEWER SYSTEM MANAGEMENT PLAN Page 5

12 Figure I 3. Wastewater Collection System, West Campus SEWER SYSTEM MANAGEMENT PLAN Page 6

13 1.0 GOAL UNIVERSITY OF CALIFORNIA, DAVIS This SSMP has been developed in response to direction by the SWRCB through the waste discharge requirements outlined in Order No DWQ. The WDR requires permittees to prepare and implement a SSMP. The goal of the SSMP is to provide a plan and schedule to properly manage, operate, and maintain all parts of the WWCS. This will help reduce and prevent SSOs, as well as mitigate any SSOs that do occur (SWRCB Order No DWQ). SSOs may cause a public nuisance, particularly when untreated wastewater is discharged to waters designated for contact recreation. Many SSOs can be prevented with adequate and appropriate facilities, source control measures and operation and maintenance of the WWCS. SEWER SYSTEM MANAGEMENT PLAN Page 7

14 2.0 ORGANIZATION UNIVERSITY OF CALIFORNIA, DAVIS Statewide General Waste Discharge Requirement (per SWRCB Order No DWQ) The SSMP must identify: a) The name of the responsible or authorized representative as described in Section J of this Order. b) The names and telephone numbers for management, administrative, and maintenance positions responsible for implementing specific measures in the SSMP program. The SSMP must identify lines of authority through an organization chart or similar document with a narrative explanation; and c) 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)). ORGANIZATIONAL STRUCTURE The responsible party for WWCS management is the Utilities Division within the Facilities Management Department. The Utilities Director is the authorized representative for the WWCS, and the Wastewater Superintendent is the lead official in charge of the management of the WWCS and implementation of this SSMP. Other UC Davis departments that play a critical role in the WWCS management include Design and Construction Management (DCM), Safety Services Environmental Health and Safety (EH&S), and Facilities Management Building Maintenance Services Plumbing (BMS Plumbing). Interested parties include Student Housing and Dining Services and Associated Students UC Davis (ASUCD). The responsibilities of each organization are summarized below and an organizational chart is included as Figure 2 1. Utilities: The Utilities Director is the authorized representative for the WWCS. The Wastewater Superintendent is the lead official in charge of the management of the WWCS and implementation of this SSMP. The implementation of permit requirements and reporting to regulatory agencies is the responsibility of the Wastewater Superintendent or his/her designee, including tracking of all SSOs and the overall operation and maintenance of the system including oversight of any contractor making repairs on the system. The Wastewater Superintendent is responsible for maintaining records regarding SSOs. SSOs of any amount of wastewater are reported to Utilities. The Wastewater Superintendent tracks overflows and assesses the frequency and volume of SSOs and works with Facilities Management staff and other campus departments to reduce and prevent SSOs. DCM: The DCM Director of Engineering or his/her designee is responsible for the management of the design and construction of standards, additions, rehabilitations, or modifications to the WWCS that constitutes a CIP project. DCM is responsible for construction management of WWCS facilities, including the testing of these assets. Safety Services EH&S: The Safety Services EH&S Director or his/her designee is responsible for enforcing the requirements and outreach efforts developed in this document campus wide. Safety Services EH&S SEWER SYSTEM MANAGEMENT PLAN Page 8

15 staff perform routine inspections on all food service facilities, which are the major grease producing facilities on campus. Facilities Management BMS Plumbing: The Facilities Management BMS Plumbing Division is responsible for maintenance of the WWCS laterals, as well as the plumbing within each building. BMS Plumbing responds to and mitigates SSOs from the sewer laterals. BMS Plumbing often works in tandem with the responding WWCS staff from Utilities to identify the cause of a SSO. Student Housing and Dining Services, ASUCD: Each unit is responsible for implementing the requirements in this document for the dining facilities under their management. Requirement include regular grease traps cleaning and maintenance and implementation of best management practices to prevent SSOs. Figure 2 1. Administrative Responsibility for the Wastewater Collection System SSMP Responsibility The Wastewater Superintendent has overall responsibility for implementing, auditing, and maintaining the SSMP. He/she may delegate these responsibilities to other UC Davis staff, as appropriate. Staff responsible for developing specific elements of the SSMP are identified by job title in Table 2 1. Table 2 1. Administrative Responsibility for the SSMP Element Element Name Responsible Official Introduction Wastewater Superintendent 1 Goal Wastewater Superintendent 2 Organization Utilities Director 3 Legal Authority Utilities Director 4 Operation and Maintenance Program Wastewater Superintendent 5 Design and Performance Provisions DCM Director of Engineering 6 Overflow Emergency Response Plan Wastewater Superintendent 7 FOG Control Program Wastewater Superintendent SEWER SYSTEM MANAGEMENT PLAN Page 9

16 Table 2 1. Administrative Responsibility for the SSMP Element Element Name Responsible Official 8 System Evaluation and Capacity Assurance Plan Utilities Director 9 Monitoring, Measurement, and Program Modifications Wastewater Superintendent 10 Program Audits Wastewater Superintendent 11 Communication Program Wastewater Superintendent Appendix A SSMP Contact Information Wastewater Superintendent Appendix B SSMP Audits Wastewater Superintendent Appendix C SSMP Change Log Wastewater Superintendent MONITORING SYSTEM AND REPORTING SSOS Members of the University community who observe an SSO may call the campus Facilities Management Customer Support phone line at (530) to report the incident. This number has 24 hour coverage to provide support for all facilities emergency response. For SSO response, Facilities Management Customer Support immediately notifies the Facilities Management Utilities staff member who is designated as the campus first responder for SSOs. The campus first responder is responsible for immediately investigating any SSO and determining the appropriate response. During work hours (Monday through Friday, 6:30am 3pm), the Wastewater Superintendent is the first responder. During non work hours (including weekends and holidays) the WWTP has on call staff. All SSOs are reported to Wastewater Superintendent, who is also responsible for reporting the SSOs to the appropriate regulatory agencies. The response to and reporting of SSOs is described in the Overflow Emergency Response Plan, included as Section 6 of this SSMP. Additionally, on call operators are notified of potential spills at the WWCS lift stations via the supervisory control and data acquisition (SCADA) system or autodialer, depending on the facility. Local SCADA has the ability to monitor flows, motor speeds, standby power systems, and wet well levels. All of the larger lift stations and some of the smaller lift stations are monitored through SCADA. Smaller lift stations not connected to SCADA, are monitored through a Silent Knight autodialer system. The autodialer is set to call out to Facilities Management Customer Support if and when an issue occurs. All raw or partially treated sewage spills are reported per the requirements set by the SWRCB. These reporting requirements are shown in Figure 2 2. Reporting on CIWQS can be completed by Data Submitters (DS) or Legally Responsible Officials (LROs). Any reporting that is required to be certified must be completed by the LRO. SEWER SYSTEM MANAGEMENT PLAN Page 10

17 Figure 2 2. SSO Reporting Flow Chart SEWER SYSTEM MANAGEMENT PLAN Page 11

18 3.0 LEGAL AUTHORITY UNIVERSITY OF CALIFORNIA, DAVIS Statewide General Waste Discharge Requirement (per SWRCB Order No DWQ) 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, stormwater, chemical dumping, unauthorized debris and cut roots, etc.); b) Require that sewers and connections be properly designed and constructed; c) Ensure access for maintenance, inspection, or repairs for portions of the lateral owned or maintained by the Public Agency; d) Limit the discharge of fats, oils, and grease and other debris that may cause blockages, and e) Enforce any violation of its sewer ordinances. The Regents of the University of California is a Constitutional Corporation, organized under Article IX, Section 9 of the California Constitution, with full authority over governance and management of the University operations. Under this authority, the University of California has legal authority to: Control infiltration and connections from inflow sources. Require that sewers and connections be properly designed and constructed. Ensure proper installation, testing, and inspection of new and rehabilitated sewers (such as new or rehabilitated collector sewers and new or rehabilitated laterals). Limit fats and greases and other debris that may cause blockages in the collection system. Prevent illicit discharges into its system (e.g., storm water or chemical dumping). Ensure access for maintenance, inspection, or repairs of all portions of the system operated by UC Davis. Implement the national pretreatment program authorities specified under 40 CFR 403.8(f)(1). Since the sewer system at UC Davis is not a public system, the University has direct control over all discharges to the WWCS. Policies adopted in this plan are adopted by all entities on campus. SEWER SYSTEM MANAGEMENT PLAN Page 12

19 4.0 OPERATION AND MAINTENANCE PROGRAM UNIVERSITY OF CALIFORNIA, DAVIS Statewide General Waste Discharge Requirement (per SWRCB Order No DWQ) The SSMP must include those elements listed below that are appropriate and applicable to the Enrollee s system: a) 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; b) 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; c) 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 term and long term plans plus a schedule for developing the funds needed for the capital improvement plan; d) Provide training on a regular basis for staff in sanitary sewer system operations and maintenance, and require contractors to be appropriately trained; and e) Provide equipment and replacement part inventories, including identification of critical replacement parts. Operation and maintenance (O&M) of the campus WWCS is the responsibility of the Utilities Division of the Facilities Management Department. The section below presents the required elements and identifies the position that is responsible for that element. COLLECTION SYSTEM MAPS The maps of the WWCS are in AutoCAD or PDF. The main campus is in AutoCAD format or PDF. The map shows line size and manhole ID. The AutoCAD map also has pipe material type, invert elevation, and age of the pipeline. WWCS maps are updated on annual basis to reflect any field changes. These maps are printed and updated copies are placed in Facilities Management Utilities vehicles for field reference. WWCS staff may occasionally become aware of inaccuracies in the system maps. The WWCS staff will report this information to the Wastewater Superintendent, who will then pass the information along to the GIS Supervisor who will update the records. As new construction occurs, DCM will provide as built drawings to the GIS Division to add new facilities to the GIS records. SEWER SYSTEM MANAGEMENT PLAN Page 13

20 PREVENTATIVE MAINTENANCE PROGRAM UNIVERSITY OF CALIFORNIA, DAVIS The O&M program consists of scheduled preventive maintenance (PM) and corrective maintenance (CM). PM includes routine maintenance on lift stations, pipeline cleaning, and on site septic disposal. Any unplanned activities such clearing blockages and repairing pipes and lift station equipment is covered under CM. Pipe segments that experience frequent blockages are identified as hot spot and are being cleaned at monthly or quarterly basis. Portions of the WWCS are cleaned and inspected as part of annual PM effort. The WWCS preventive maintenance program includes planned and scheduled line maintenance or repair based on past history and routine systematic inspection and cleaning of the entire system. The current system has a monthly/weekly preventive maintenance program for the lift stations and an annual program for in pipe root control. Each sewer lift station is inspected weekly, and sewer pipelines that are experienced more frequently stoppage are cleaned on monthly or quarterly basis, depending on severity of the issue. Existing septic tanks are also scheduled to be cleaned and pumped out on monthly or annual basis depending on how much load is added to system and how well water can be drained through leachate field. Preventative maintenance is scheduled through the work order management system. Facilities Management is currently (as of March 2018) in the process of migrating work order management to the TRIRIGA system. This system, like other work order management systems previously used by Facilities Management staff, allows for routine maintenance activities to be scheduled and all work orders to be tracked. UC Davis has measures in place in order to keep the system in good repair and prevent excessive infiltration/inflow, service interruptions, and system failures. This is done through scheduled regular maintenance and inspections of the collection system, which is summarized below. Routine Maintenance: Root control: Maintenance from root intrusion is conducted on an as needed basis, based on the results of routine inspections. Odor control: UC Davis has odor control systems at SSLS 10, SSLS 11, and SSLS 12A. Gravity sewer pipes and manholes: Once a year portions of the system are cleaned using a hydrojet and vacuum. Areas are targeted based on the information obtained through routine inspections. Lift station cleaning: Typically the wet wells are cleaned on a quarterly basis. This frequency is adjusted as needed based on conditions observed during weekly inspections of the stations. Routine Inspections: Lift stations: Visually inspected weekly. Real time remote monitoring via SCADA for all large lift stations and some small stations, emergency notification via Silent Knight autodialer for other stations. Emergency standby generators: No load runs are conducted for 10 to 30 minutes every month. Load tests are conducted every 6 months. Gravity sewer pipes and manholes: Every year portions of the system are inspected using video technology. The inspection program focuses on lines 8 inches and larger; however, 6 inch lines are inspected where possible. SEWER SYSTEM MANAGEMENT PLAN Page 14

21 REHABILITATION AND REPLACEMENT Rehabilitation and replacement needs are either condition based or capacity based. UNIVERSITY OF CALIFORNIA, DAVIS The system is routinely inspected via CCTV to identify condition based improvement needs. The Wastewater Superintendent is responsible for scheduling these activities. Typically, a portion of the system is inspected annually during the summer months. The CCTV work is currently competed by an outside contractor via a service agreement contract. The CCTV inspections are reviewed to determine rehabilitation and replacement needs based on the observed condition of the pipe. Rehabilitation methods may include spot repairs, lining, or full replacement, if needed. All repairs are currently completed by an outside contractor via a service agreement contract. Long term capacity needs are identified through the WWCS master planning process. The capacity related rehabilitation and replacement needs were last identified in the 2006 Sanitary Sewer Master Plan (West Yost, 2006). Renewal projects were implemented to addresses capacity improvements of sewer pipes and sewer lift stations. The University is currently undertaking an update to this master plan to identify capacity improvement needs through 2030/31. TRAINING Training is conducted by individual departments and work groups as appropriate for their duties. Most training for the WWCS staff is handled through monthly tailgates, and is organized by a designated safety coordinator. Training topics include safe work practices, technical training SSO response, training on new systems, and other appropriate topics. The University utilizes a service agreement contract for outside contractors to perform inspection and repairs on the sewer system. The service agreement contract stipulates that contractor s staff must be properly trained on collection systems operations. EQUIPMENT AND REPLACEMENT PARTS INVENTORY Facilities Management Utilities maintains the equipment listed in Table 4 1 to provide sufficient operation and maintenance and emergency response for the WWCS facilities. Table 4 1. Equipment Inventory Equipment Item Number Available Vacuum/Hydrojet Combination Truck 1 Utility Truck 1 Trailer Mounted Vacuum Excavator 1 Portable pump and suction/discharge hose 1 Portable Generator Available via campus generator shop Emergency Response Trailer (contains equipment, tools, (To be purchased) and spill preventing kits) Facilities Management Utilities maintains a small inventory of replacement parts for the lift station facilities. Many of the stations use standardized equipment. A small number of replacement pumps (at least one per type) are kept on hand for emergencies. The Utilities Instrumentation and Controls group also has replacement parts on hand for select repairs. Repairs that require equipment or materials beyond SEWER SYSTEM MANAGEMENT PLAN Page 15

22 existing capabilities are executed by an outside contractor. Replacement parts for the gravity sewer system are not maintained, as all repairs are completed by an outside contractor. SEWER SYSTEM MANAGEMENT PLAN Page 16

23 5.0 DESIGN AND PERFORMANCE PROVISIONS UNIVERSITY OF CALIFORNIA, DAVIS Statewide General Waste Discharge Requirement (per SWRCB Order No DWQ) a) Design and construction standards and specifications for the installation of new sanitary sewer systems, pump stations and other appurtenances; and for the rehabilitation and repair of existing sanitary sewer systems; and b) Procedures and standards for inspecting and testing the installation of new sewers, pumps, and other appurtenances and for rehabilitation and repair projects. The UC Davis has adopted the Campus Standards & Design Guide (CS&DG) to provide a list of preferred and required products and mandatory design constraints for all construction projects. The purpose of the CS&DG is to aid the design professional in the development of a successful project while meeting the requirements of the University. This document is not aimed to replace the work of the design professional or their best judgment, nor is it to be taken verbatim as a contract specification. The goal is to ensure that the campus is provided with functional and long lasting infrastructure based on experience with existing campus infrastructure and maintenance issues that have been encountered. The CS&DG is administrated by DCM and is subject to update on an annual basis. Changes are normally compiled at the beginning of the year and sent to the CS&DG review committee. This committee, consisting of key individuals from various campus departments (DCM, Police, TAPS, Fire, Facilities Management, Campus Planning & Environmental Stewardship, etc.), reviews the proposed changes. The Campus Design Guide can be located online at STANDARDS FOR INSTALLATION, REHABILIATION AND REPAIR The CS&DG standards outline construction specifications for installing new sewer systems, pump stations, and other appurtenances; and for rehabilitation and repair of existing sewer systems. Any new construction, rehabilitation, or repair of the WWCS will adhere to the CS&DG standards. In addition to the CS&DG, various procedures are in place to ensure that new and rehabilitated facilities are properly designed and constructed. Designs are completed by professional engineers and reflect the current engineering practices and standards. Designs also go through an extensive internal review process, which includes representatives from multiple campus departments. This review process includes opportunities for comment on the designs at various phases throughout the design process, as appropriate for the type of project. STANDARDS FOR INSPECTION AND TESTING OF NEW AND REHABILITATED FACILITIES Inspection and testing of sewer facilities ensures that the established standards are being implemented in the field. The University adheres to the standards for inspection and testing of new or rehabilitated facilities that are outlined in the CS&DG standards. Per the CS&DG, acceptance testing for gravity sewers can include: low pressure air test or water test to identify leakage, mandrel test to identify deflection of flexible pipe, water or vacuum test of manholes to identify leakage, and/or television inspection to identify grade variations or other construction defects. Pressure testing is the standard testing method for sanitary sewer systems. Prior to putting the sewer facility into service, the contractor provides the installation/start up verification and functional performance test sheets for review by the DCM Inspector. SEWER SYSTEM MANAGEMENT PLAN Page 17

24 6.0 OVERFLOW EMERGENCY RESPONSE PLAN UNIVERSITY OF CALIFORNIA, DAVIS Statewide General Waste Discharge Requirement (per SWRCB Order No DWQ) Each Enrollee shall develop and implement an overflow emergency response plan that identifies measures to protect public health and the environment. At a minimum, this plan must include the following: a) Proper notification procedures so that the primary responders and regulatory agencies are informed of all SSOs in a timely manner; b) A program to ensure an appropriate response to all overflows; c) Procedures to ensure prompt notification to appropriate regulatory agencies and other potentially affected entities (e.g. health agencies, Regional Water Boards, water suppliers, etc.) of all SSOs that potentially affect public health or reach the waters of the State in accordance with the MRP. All SSOs shall be reported in accordance with this MRP, the California Water Code, other State Law, and other applicable Regional Water Board WDRs or NPDES permit requirements. The SSMP should identify the officials who will receive immediate notification; d) Procedures to ensure that appropriate staff and contractor personnel are aware of and follow the Emergency Response Plan and are appropriately trained; e) Procedures to address emergency operations, such as traffic and crowd control and other necessary response activities; and f) A program to ensure that all reasonable steps are taken to contain and prevent the discharge of untreated and partially treated wastewater to waters of the United States and to minimize or correct any adverse impact on the environment resulting from the SSOs, including such accelerated or additional monitoring as may be necessary to determine the nature and impact of the discharge. The purpose of the Overflow Emergency Response Plan (OERP) is to establish guidelines and measures to protect public health and the environment in case of an accidental SSO. All WWCS personnel are asked to read the OERP and familiarize themselves with the procedures. The WWCS staff have regular trainings on the OERP to continue to familiarize themselves with the proper response procedures. The OERP is posted on the Facilities Management Utilities website for access by staff and the public. SSO DETECTION AND NOTIFICATION SSOs would typically be detected in one of three ways: By the SCADA or alarm system: The SSLS SCADA and alarm systems monitor the status of each facility. The system provides immediate notification of any equipment failure to the on call personnel. By Facilities Management personnel during daily routines: Facilities Management personnel who discover a potential SSO during their daily operations are responsible for immediately notifying the Facility Management Customer Support at (530) and taking appropriate action. SEWER SYSTEM MANAGEMENT PLAN Page 18

25 UNIVERSITY OF CALIFORNIA, DAVIS By the public: Members of the University community who observe a SSO may also call Facility Management Customer Support at (530) In the case of notification of a SSO by Facilities Management staff or the public, Facilities Management Customer Support shall obtain all relevant information available regarding the possible SSO including: Time and date the call was received, Specific location of possible SSO, Description of the problem, and Caller s name and call back phone number. Facilities Management Customer Support will immediately dispatch the appropriate crews to investigate, identify the cause, and provide appropriate service to minimize the effects of the SSO on public health and quality of surface waters. Response time to a SSO will be less than an hour after the first call. FIRST RESPONDER ASSESSMENT OF SSO The failure of any element of the WWCS that threatens to cause or causes a SSO will be responded by the Facilities Management Utilities first responder. The first responder s responsibility is to identify, isolate, and correct the problem. The first responder will: 1. Assess the failure of equipment or SSO release, 2. Call for assistance (if needed) including additional personnel, materials, supplies, and equipment. If the spill is larger than they can adequately respond to, an outside contractor will be called. 3. Use appropriate Personal Protective Equipment. 4. Use appropriate safety precautionary measures including traffic cones, sand bags and contaminant absorbents. 5. Obtain necessary equipment to respond to spill. Facilities Management maintains a supply of materials to mitigate spills. Available equipment includes sand bags, bypass pumps, hoses, emergency generators, and truck with mounted crane. 6. Coordinate with Safety Services EH&S if there is a suspicious substance (e.g. oil sheen, foam) to be found on the ground surface. Additionally, if there is a suspicious odor (e.g. gasoline) not common to the WWCS, Safety Services EH&S should be contacted. Based on the professional judgment of the Facilities Management staff, other parties are notified as appropriate. Typical working hours are Monday through Friday, 8:00 am 5:00 pm. However, on call personnel are available for SSO response 24 hours per day, including weekends and holidays. Afterhours calls are routed by Facilities Management Customer Support to the appropriate on call personnel. The internal departments can be reached at the numbers listed below: Facilities Management Customer Support (24 hours): Safety Services EH&S: Student Housing and Dining Services: SEWER SYSTEM MANAGEMENT PLAN Page 19

26 SSO CORRECTION, CONTAINMENT, AND CLEAN UP The following specific actions are to be performed by the response crews during an SSO: Contain the spill: - Contain the wastewater discharged to the maximum extent possible by utilizing spill containment devices - Place sand bags around storm curb inlets and area drains to keep spill from reaching storm drainage - Plug the outfall at the Arboretum Waterway to prevent contaminated water from getting into surface water (if necessary) Determine the location and cause of the SSO: - Assessment will include a check of the lift station pumps and upstream and downstream manholes Stop the SSO: - Implement appropriate corrective actions. This may include the use of vacuum trucks, emergency pumps, and emergency generators - If the failure is at a lift station, take the malfunctioning pump offline Secure the affected area and post warning signs: - Place barricades, cones, caution tape and fencing (if necessary) to secure the site - Post warning signs to notify the public of the potential hazard Clean the affected area - Remove contaminated residual from storm pipes - Clean and sanitize the affected area Collect Water Quality Samples (Required for Category 1 spills that are 50,000 gallons or greater) - Follow sampling procedures listed in Figure 6 2 Document the SSO - Finalize the documentation for the incident - Review overall response with the Responding Parties Report the SSO - Follow the reporting procedures listed in Figure 6 1 REGULATORY NOTIFICATION PROCEDURES All SSOs must be reported to the RWQCB, and some SSOs must be reported to other regulatory agencies, as required by the WDR. The reporting procedures are documented in Figure 6 1 below. SEWER SYSTEM MANAGEMENT PLAN Page 20

27 Figure 6 1. SSO Reporting Procedures SEWER SYSTEM MANAGEMENT PLAN Page 21

28 WATER QUALITY SAMPLING PROCEDURES UNIVERSITY OF CALIFORNIA, DAVIS Water quality sampling for ammonia and a bacterial indicator (enterococcus) is required for spills 50,000 gallons or greater that enter a waterway. Sampling procedures are documented Figure 6 2 in below. Figure 6 2. Water Quality Sampling Procedures SEWER SYSTEM MANAGEMENT PLAN Page 22

29 TRAINING REQUIREMENTS UNIVERSITY OF CALIFORNIA, DAVIS Training will be conducted for members of the departments that are responsible for implementing the Overflow Emergency Response Plan (OERP) which includes Facilities Management and Safety Services EH&S. Facilities Management is responsible for providing technical training for Utilities, Building Maintenance, and Customer Support staff responding to sewer spills. The OERP will be distributed to designated staff members of the departments as indicated below, who will be responsible for implementing the appropriate training: Safety Services EH&S: EH&S Director Facilities Management: Utilities Director, Building Maintenance Services Director, and Customer Support Supervisor Contractor personnel are trained on the appropriate response to SSOs prior to beginning construction of a new project. DCM coordinates a Pre Dig meeting with the contractor and key personnel from Safety Services EH&S and Facilities Management Utilities. This meeting include a review of emergency response procedures to be followed should any of the utilities be damaged. SEWER SYSTEM MANAGEMENT PLAN Page 23

30 7.0 FOG CONTROL PROGRAM UNIVERSITY OF CALIFORNIA, DAVIS Statewide General Waste Discharge Requirement (per SWRCB Order No DWQ) Each Enrollee shall evaluate its service area to determine whether a FOG control program is needed. If an Enrollee determines that a FOG program is not needed, the Enrollee must provide justification for why it is not needed. If FOG is found to be a problem, the Enrollee must prepare and implement a FOG source control program to reduce the amount of these substances discharged to the sanitary sewer system. This plan shall include the following as appropriate: a) An implementation plan and schedule for a public education outreach program that promotes proper disposal of FOG; b) A plan and schedule for the disposal of FOG generated within the sanitary sewer system service area. This may include a list of acceptable disposal facilities and/or additional facilities needed to adequately dispose of FOG generated within a sanitary sewer system service area; c) The legal authority to prohibit discharges to the system and identify measures to prevent SSOs and blockages caused by FOG; d) Requirements to install grease removal devices (such as traps or interceptors), design standards for the removal devices, maintenance requirements, BMP requirements, record keeping and reporting requirements; e) Authority to inspect grease producing facilities, enforcement authorities, and whether the Enrollee has sufficient staff to inspect and enforce the FOG ordinance; f) An identification of sanitary sewer system sections subject to FOG blockages and establishment of a cleaning maintenance schedule for each section; and g) Development and implementation of source control measures for all sources of FOG discharged to the sanitary sewer system for each section identified in (f) above. This fats, oils, and grease (FOG) control program has been developed as part of the UC Davis SSMP and builds upon the on going grease and oil source control program that the University has in place. The purpose of the program is to reduce the amount of FOG discharged to the WWCS. Since the UC Davis WWCS is not a public system, the University has direct control over any facility that disposes of FOG into the WWCS. FOG CONTROL INFRASTRUCTURE The dining facilities are the major sources of FOG for the campus. Each of the dining facilities has a grease interceptor. In addition, there are smaller grease control devices at other locations throughout campus, where necessary. The locations of the major grease traps or interceptors are listed in Table 7 1 and their locations shown on Figure 7 1. SEWER SYSTEM MANAGEMENT PLAN Page 24

31 Table 7 1. Grease Interceptors Location Tercero Dining Commons Segundo Dining Commons ASUCD Coffee House (at Memorial Union) Silo Restaurants Scrubs Cafe Size and Type 10,000 gallon grease interceptor 10,000 gallon grease interceptor 5,000 gallon grease interceptor 5,000 gallon grease interceptor 3,000 gallon grease interceptor An additional grease interceptor is located at the Cuarto Dining Commons. Although the Cuarto Dining Commons is owned by UC Davis, the wastewater from the Student Housing and Dining Services facility discharges to the City of Davis WWCS. The facility adheres to source control measures established by the City of Davis and is not included as part of this SSMP. Figure 7 1. Grease Interceptor Locations SEWER SYSTEM MANAGEMENT PLAN Page 25

32 FOG SOURCE CONTROL PROGRAM UNIVERSITY OF CALIFORNIA, DAVIS The elements of the FOG source control program include: public education outreach, FOG disposal procedures, standards for the installation of new grease removal devices, and identification of FOG blockages Public Education Outreach Best management practices (BMPs) are in place to prevent the introduction of FOG into the WWCS. The kitchen manager is responsible for the training of new staff on the FOG BMPs occurs upon hiring and includes the following information: Kitchen staff is trained upon hiring on BMPs to ensure that they are implemented. Kitchen staff is trained upon hiring on bulk grease practices. Bulk grease is not washed into the WWCS. Additionally, grease in pans is not washed down the drain. Excess grease that is generated from grilling or frying is collected in a dedicated container. Grease traps in the La Rue Park are cleaned quarterly. If a grease interceptor is not working properly, Facilities Management is contacted (Student Housing and Dining Services or ASUCD will contact the Facilities Management Customer Support Center.) Signs are posted in the work areas of employees who use the grease traps or interceptors FOG Disposal Procedures The owners of each facility (Student Housing and Dinning Services or ASUCD) are responsible for cleaning the grease interceptors on quarterly basis. Cleaning is completed by a contractor and the FOG is disposed of off site. Invoice records for pumping of grease interceptors are reviewed periodically by Facilities Management Utilities to ensure the contractor is maintaining the inspection schedule and pumping out the grease interceptors when necessary Installation of New Grease Removal Devices New food service facilities, and other facilities as deemed necessary, are required to have a grease removal device. Grease interceptors and traps are sized by the design engineer and are designed to meet current engineering practices and standards. DCM implements a review process during the design of new facilities. This review process provide opportunity for Facilities Management Utilities, Safety Services EH&S, and other campus departments to comment on the grease removal device design Identification of FOG Blockages The WWCS has historically had no major FOG issues. Potential FOG blockages would be identified through system maintenance of the WWCS. System maintenance includes both preventive maintenance and corrective maintenance that is identified through routine inspections. Maintenance procedures are outlined in Section 4 of this SSMP. SEWER SYSTEM MANAGEMENT PLAN Page 26

33 8.0 SYSTEM EVALUATION AND CAPACITY ASSURANCE PLAN UNIVERSITY OF CALIFORNIA, DAVIS Statewide General Waste Discharge Requirement (per SWRCB Order No DWQ) The Enrollee shall prepare and implement a capital improvement plan (CIP) that will provide hydraulic capacity of key sanitary sewer system elements for dry weather peak flow conditions, as well as the appropriate design storm or wet weather event. At a minimum, the plan must include: a) Evaluation: Actions needed to evaluate those portions of the sanitary sewer system that are experiencing or contributing to an SSO discharge caused by hydraulic deficiency. The evaluation must provide estimates of peak flows (including flows from SSOs that escape from the system) associated with conditions similar to those causing overflow events, estimates of the capacity of key system components, hydraulic deficiencies (including components of the system with limiting capacity) and the major sources that contribute to the peak flows associated with overflow events; b) Design Criteria: Where design criteria do not exist or are deficient, undertake the evaluation identified in (a) above to establish appropriate design criteria; and c) Capacity Enhancement Measures: The steps needed to establish a short and long term CIP to address identified hydraulic deficiencies, including prioritization, alternatives analysis, and schedules. The CIP may include increases in pipe size, I/I reduction programs, increases and redundancy in pumping capacity, and storage facilities. The CIP shall include an implementation schedule and shall identify sources of funding. d) Schedule: The Enrollee shall develop a schedule of completion dates for all portions of the capital improvement program developed in (a) (c) above. This schedule shall be reviewed and updated consistent with the SSMP review and update requirements. The University periodically completes updates to the WWCS Master Plan to provide a capacity assessment of the WWCS and identify improvements necessary to accommodate existing and future loads during peak weather conditions. The capacity assessment for the WWCS Master Plan is completed using design criteria developed by the design engineer in consultation with Facilities Management Utilities and DCM. A comprehensive update to the Master Plan was last completed in This 2006 WWCS Master Plan Update resulted in many recommendations for capacity enhancement measures, all of which were implemented on a schedule from 2006 to Since this time, small scale studies of areas of new development have occurred and capacity upgrades have be implemented where required from those studies. The University is currently undertaking a major effort to update all water systems master plans, including the WWCS Master Plan. This process is expected to conclude in late 2019, and is expected to include recommendations for capacity enhancements through the year 2030/31. SEWER SYSTEM MANAGEMENT PLAN Page 27

34 9.0 MONITORING, MEASUREMENT, AND PROGRAM MODIFICATIONS Statewide General Waste Discharge Requirement (per SWRCB Order No DWQ) The Enrollee shall: a) Maintain relevant information that can be used to establish and prioritize appropriate SSMP activities; b) Monitor the implementation and, where appropriate, measure the effectiveness of each element of the SSMP; c) Assess the success of the preventative maintenance program; d) Update program elements, as appropriate, based on monitoring or performance evaluations; and e) Identify and illustrate SSO trends, including: frequency, location, and volume. PERFORMANCE MONITORING Facilities Management Utilities will monitor the performance of the wastewater collection system at least biannually (concurrent with SSMP Audits) using the performance measures identified in this element. Other performance measures, other than those listed in this SSMP, may be used in this biannual evaluation. Facilities Management Utilities will prioritize operations and maintenance practices, and any related programs based on the results of this evaluation. The indicators that the University will use to measure the performance of its wastewater collection system and the effectiveness of the SSMP are: SSO rate (#/miles/year) compared to state and state school averages reported by the RWQCB, Number of SSOs, Cause of SSOs Volume of Spills and Portions of SSO Recovered Baseline Performance The SWRCB uses the number of spillls normalized by the number of miles of collection system pipelines to compare the spill rate between one system to the next, comparing similar types of systems to one another. The results of the compairison of mainline spill rates between all schools and UC Davis are shown in Figure 9 1 below. The Unviersity is far below the average mainline spill rate for schools, typically with between 0 12 mainline spills per 100 miles per year compared to the school average of between mainline spills per 100 miles per year. SEWER SYSTEM MANAGEMENT PLAN Page 28

35 Figure 9 1. UC Davis versus State School Average SSO Rate Number of SSOs Source: CIWQS, 3/9/2018 The University has historically had a very low spill rate. For the period 2009 to 2017 there have been no more than three SSOs per year and in some years no SSOs. Over this period, there has been only one SSO caused by a force main failure, a spill in 2015 from a force main ARV. Spills are typically caused by issues in the gravity mainline or the building lateral. Figure 9 2. Number of SSOs per Year by Location Source: CIWQS, 3/9/2018 SEWER SYSTEM MANAGEMENT PLAN Page 29

36 9.1.3 Cause of SSOs SSOs are most commonly caused by debris accumulation, and other common causes include root intrusion. Of note, there are no SSOs caused by other factors common in other agencies such as grease accumulation or insufficient capacity. Figure 9 3. Number of SSOs per Year by Cause Spill Volume and Portion of SSOs Recovered Source: CIWQS, 3/9/2018 Table 9 1 below shows the total volume of each SSO and the volume recovered for the period 2009 to The resulting percent recovery was also calculated and is shown. Due to the SSO response procedures in place, the University has typically had a very good recovery rate total (100%) recovery for most spills and a few instances of less than complete recovery. This can be attributed to the effectiveness of the SSO response procedures currently in place. Table 9 1. Spill Volume Recovered per SSO Year SSO Event ID Spill Volume, gallons Volume Recovered, gallons Percent Recovered % % % % % % % % SEWER SYSTEM MANAGEMENT PLAN Page 30