Mt. View Sanitary District

2018 Sewer System Management Plan Audit

July 2018

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Table of Contents Scope and Purpose ............................................................................................................................. 3

Audit Format ...................................................................................................................................... 3

Element 1 − GOAL .............................................................................................................................. 4

Element 2 – District Organization ...................................................................................................... 4

Element 3 − Legal Authority .............................................................................................................. 5

Element 4 – Operation and Maintenance Program .......................................................................... 6

Element 5 – Design and Performance Provisions .............................................................................. 8

Element 6 – Overflow Emergency Response Plan ............................................................................. 8

Element 7 – FOG Control Program .................................................................................................... 9

Element 8 – System Evaluation and Capacity Assurance Plan ........................................................ 11

Element 9 – Monitoring, Measurement and Program Modifications ............................................. 12

Element 10 – SSMP Program Audits ................................................................................................ 13

Element 11 – Communication Program .......................................................................................... 13

Appendixes Table of Contents ......................................................................................................... 14

Appendix A- List of Figures, Maps and Tables ................................................................................. 15

Appendix B – Agency Comparisons .................................................................................................. 22

Appendix C- 2016-2018 SSMP Audit Identified Deficiencies .......................................................... 23

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Scope and Purpose The State Water Resources Control Board (SWRCB) Sanitary Sewer System Waste Discharge Requirements Order No. 2006-0003-DWQ as amended by WQ 2008-0002 EXEC (SSSWDR Orders) requires the Mt. View Sanitary District (MVSD) conduct a Sewer System Management Plan (SSMP) audit a minimum of every two years or more frequently if warranted. MVSD last conducted an audit in March of 2016 and is therefore required to conduct another audit during 2018 and to keep a file of the report with the most current version of the SSMP. This SSMP Audit Report is required to evaluate the effectiveness of and compliance with MVSD’s current revision of the SSMP. The SSMP Audit Report measures compliance with section D.13 of the SSSWDR Orders and the effectiveness of MVSD’s implementation of the current certified SSMP dated July 2014. The Elements contained within the July 2014 SSMP are as follows:

Element 1 - Goals Element 2 - District Organization Element 3 - Overflow Emergency Response Plan Element 4 - Fats, Oils and Grease (FOG) Control Program Element 5 - Legal Authority Element 6 - Measure and Activities Element 7 - Design and Construction Standards Element 8 - Capacity Management Element 9 - Monitoring, Measurement and Program Modifications Element 10 - SSMP Audits Element 11 - Communication Program

(Elements 1 - 11 of the July 2014 SSMP are not in structural alignment with the current SSSWDR. This deficiency is noted in the 2016 and 2018 audits. it is scheduled for revision as noted in Appendix C along with other findings.

Audit Format Each element of this audit includes a citation to the relevant subsection of section D.13 of the SSSWDR No. 2006-0003-DWQ. Following each element is the District’s audit response to the existing plan. Deficiencies or Action Plans are described in each element and further summarized in Appendix C. Due to the planned schedule for changes in the 2016 audit, changes have not been addressed at this time (July 2018 audit). Changes will occur with the 2019 re-certification. Appendixes A and B have been updated to reflect combined 2014-2017 SSMP data.

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Element 1 − GOAL The goal of the 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 occur. Mt. View Sanitary District’s SSMP aims to achieve the following four (4) goals:

1. Continue to properly manage, operate, and maintain all parts of the wastewater collection system

2. Provide adequate capacity to convey peak flows 3. Minimize the frequency of SSOs 4. Mitigate the impacts of SSOs

During 2014-2017 the District continued to manage, operate and maintain all parts of the collection system. There were no SSOs reported due to lack of capacity during dry or peak flows. SSOs were minimal in size; all SSOs are mitigated to limit public heath exposure and environmental damage. The tables and graphs in Appendix A serve to further demonstrate the effectiveness of the District’s proactive management for 2014 through 2017. The District has heavily invested time and funds to develop and improve its digital information in order to make it available to administrative, management and field staff. The GIS and CMMS have been in full effect over the past several years. Further enhancements have occurred in 2016 to upgrade, integrate, and enhance these two aspects of the SSMP.

Element 2 – District Organization 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 the management, administrative, and

maintenance positions responsible for implementing specific measures in the SSMP Program. The SSMP must identify line of authority through an organization chart or similar document with a narrative explanation

c) The Chain of command for reporting SSOs, from receipt of a complaint or other

information, including the person responsible for reporting SSOs to the State or Regional

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Water Board and other Environmental Health Agency, Regional Water Board, and or State Office of Emergency Services.

As of July 2018, the District has designated the District Manager, Assistant District Manager, District Engineer, Wastewater Operations Supervisor, SSMP & Maintenance Coordinator, and Maintenance Scheduler / Planner as duly authorized representatives for the purposes of electronic reporting and certifying reports in compliance with this order. The District Organization chart is located within the SSMP document. It identifies key administrative, management and maintenance positions and identifies the line of authority. This information is also available within the Overflow Emergency Response Plan. The Overflow Emergency Response Plan outlines and provides forms and information on how to receive complaints, respond to sewer service calls and spill estimation guides. It identifies District policies and procedures, who is responsible for reporting and the regulatory notification process complete with required forms. This plan is further discussed in Element 6 of this audit. Deficiencies or Action Plan identified in Element 2: Update District Organization chart to reflect recent changes. Update Key positions with phone number directory. Create flow chart depicting MVSD’s current SSO chain of command response.

Element 3 − Legal Authority Each Enrollee must demonstrate, through sanitary sewer system use ordinances, service agreements, or other legally binding procedures, that it possesses the necessary legal authority to:

(a) Prevent illicit discharges into the sanitary sewer system (examples may include I/I, storm water, 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.

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The District’s Regulations are currently contained in the Mt. View Sanitary District Code adopted by the District’s Board of Directors in September 2010 and amended in September 2013. The amended Code assembled and organized the rules, regulations, and policies of the District into a single document for easy access by District officials, employees, and members of the public. Chapter 3 of the Code consolidates District Ordinances Nos. 93-68 and 93-69 as they pertain to use of the collection system. This chapter sets forth rules, regulations, restrictions and requirements for discharges to the District’s wastewater collection, treatment, and disposal system. Chapter 4 of the Code regulates the design, construction, installation, and use of public and private sanitary sewers. Chapter 5 establishes requirements for permits. Chapter 6 establishes policies, standards, and requirements for District Easements. Chapter 7 sets forth regulations governing fees, rates, and charges imposed and collected by the District. Chapter 10 sets forth provisions for civil and criminal penalties for violations. Since the adoption of the District Code, amendments and bulletins are issued to further explain, enhance, and enforce the Code. The current Code is available at the District office and on the District’s website.

Element 4 – Operation and Maintenance Program The SSMP must include those elements listed below that are appropriate and applicable to the enrollee’s system:

(a) Maintain up-to-date map of the sanitary sewer system, showing all gravity line segments and manholes, pumping facilities, pressure pipes and valves, and applicable storm water conveyance facilities;

(b) Describe routine preventative operations 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 works 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 scheduled 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

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short and long-term plans plus a schedule for developing the funds needed for 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.

The District maintains maps of the service area and digitized them in 2006. The maps are continually updated as new residential and commercial sites are developed. Print maps are located in service vehicles for field use. The District GIS is available to staff at all times where line segments, manholes, SSO/SSC information and other engineering data is readily accessible. The current SSMP describes the District preventative maintenance program. The District has implemented a GIS/CMMS which documents scheduled and unscheduled maintenance activities including preventative maintenance, SSO/SSC response, trouble spots, root foaming, digital inspections, and R&R projects. The District continues to digitally inspect assets in the sanitary sewer system. These inspections are analyzed and uploaded to a computerized Pipe Rating System (PRI). The PRI prioritizes inspection defect scores and identifies high priority repairs. Along with the stated assessment, the District developed a flow chart to further ensure prioritization of repairs and /or move identified assets to the short-term or long-term CIP. The District continues to train collections system and responding staff on SSO estimation, collections system operations, mitigating SSOs, and regulatory notification. They attend offsite conferences and training sponsored by CWEA, local sections and vendor workshops. Contractors working for the District must meet contracting specification which could include bonds, insurance and training documents prior to issuance of notice to proceed. The District maintains contingency plans, emergency equipment and spare part inventories. The SSMP lists these inventories which are located at the District’s treatment plant and are readily available. Contingency plans for the District’s four pump stations (developed in 2014) have been distributed to operations staff. Contingency plans placed at each pump station are available for reference to staff. A review should occur by July 2019 to update or further enhance these plans. Additionally, the District has invested in Smartcover technologies at its 4 pump stations and key locations in the collection system. This provides independent redundant high water level alarms to detect surcharges in the collection system.

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Element 5 – Design and Performance Provisions

(a) Design and construction standards and specifications for the installation of new sanitary sewer system, pump stations, and other appurtenances; and for the rehabilitation a repair of existing sanitary sewer system; and

(b) Procedures and standards for inspecting and testing the installation of new sewers,

pumps, and other appurtenances and for rehabilitation and repair projects. In August 1987, the District adopted the Central Contra Costa Sanitary District’s (CCCSD) Standard Specifications for design and construction. Subsequent publications have been adopted by the governing Board of Directors. Pump station design and other appurtenances not covered in the Standard Specifications are submitted to the District Engineer for approval.

Element 6 – Overflow Emergency Response Plan 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 overflows;

(c) Procedures to ensure prompt notification to appropriate regulatory agencies and other

potentially affected entities (e.g. health agencies, Regional Water Boards, water supplies, 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, California Water Code, Other State Law, and other applicable Regional Water Boards WDRs or NPDES permit requirements, The SSMP should identify the officials who will received 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) Procedure to address emergency operations, such as traffic and crowd controls 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

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and to minimize or correct any adverse impacts on the environment resulting from the SSOs, including such accelerated or additional monitoring as may be necessary to determine the nature and impacts of the discharge.

The Sanitary Sewer Overflow and Backup Response Plan was updated in 2014. Updates included in the plan reflect the amendments to the MRP set forth in Order 2013-0058 EXEC effective September 9, 2013. The Sanitary Sewer Overflow and Backup Response Plan identifies District policies and procedures and designates who is responsible for reporting and regulatory notification. It provides a field guide to customer response, SOPs for clearing blockages, containment procedures, bypass procedures, spill estimation, and emergency contact information. It contains water quality monitoring procedures and field sampling instructions. It provides instruction on use of customer packet forms and District related forms. These forms are in field packets for distribution when SSOs or backups occur. The District has upgraded its telephone system allowing on-call staff to be contacted directly after close of business or on weekends/holiday times to responding to emergency situations. Procedures remain in place with the local Police and Sheriff Departments. If complaints are received by either department a call is placed to on-call staff. Annual review and training is performed by supervisors to responding staff. Staff is trained in traffic control through safety meetings, tailgate meetings, and also workshops sponsored by other agencies and vendors. The Sanitary Sewer Overflow and Backup Response Plan has been distributed to staff and placed in responding vehicles for accessibility. The Overflow Emergency Response Plan (OERP) was last updated in March of 2014. Updates included in the plan reflect the amendments to the MRP set forth in Order 2013-0058 EXEC effective September 9, 2013. Further updates and review of the OERP will take place by July 2019 when the updated revision of the SSMP occurs. Deficiencies or Action Plan identified in Element 6:

Reflect in the current SSMP the regulatory notification officials. Review and update as needed procedures with local Police and Sheriff

Departments Review and update as needed the Overflow Emergency Response Plan

Element 7 – FOG Control Program

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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:

(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 the sanitary sewer system service area;

(c) The legal authority to prohibit discharges to the system and identify measures to prevent

SSOs and blockage caused by FOG;

(d) Requirements to install grease removal devices (such as traps or interceptors), design standards for the removal device, 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. The District’s Fog Control Program consists of a source control and pollution prevention program and the sanitary sewer preventative maintenance program. The source control program has been developed along with contract inspections performed by CCCSD. They are contracted to inspect approximately 40 establishments within the MVSD service area per year. This includes restaurants, auto shops, dental operations, businesses, and other FOG producers. This contract was extended to June of 2019. Additional information on inspections, warning notices and NOVs is located in Appendix A. Development of the GIS and CMMS has included layered maps displaying trouble spot areas, SSO/SSC, and Food Handling Establishments (FHEs). Schedules have been developed to clean these areas more frequently. With the upgraded GIS/CMMS future enhancements are planned. Deficiencies or Action Plan identified in Element 7:

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Review GIS FOG and FSE establishment layers and update as needed to meet current conditions.

Element 8 – System Evaluation and Capacity Assurance Plan 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 flows conditions, as well as the appropriate design storm and wet weather event. At a minimum the plan must include:

(a) Evaluations: 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 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 increase in pipe size, I/I reduction programs, increase 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 plan developed in (a)-(c) above. This schedule shall be reviewed and requirements as described in Section D.14.

In April 2013, the District completed the Sanitary Sewer Flow Monitoring and Hydraulic Modeling Project. Flow Monitoring Analysis results indicate that certain areas in the District experience excessive total I&I above typically allowable rates. Hydraulic Capacity modeling found that in general the existing wastewater collection system has sufficient capacity to convey build-out design flows, with the exception of a few locations. The document remains relevant at this time. In 2015, the District completed a Smoke Testing Plan to evaluate approximately 35 miles out of the 73 miles of gravity sewers in the District’s service area. The areas tested were prioritized by age of pipe. Several defects or prohibited connections were located. Where these defects or prohibited connections were found to be a private lateral issue the District sent notices to property owners notifying them of the defects and the District’s code requirements to rectify the identified

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issues. Locations that were found to be District-related were repaired or added to the list of priority repairs. Funds are included in the 2017-2021 CIP to expand smoke testing areas. The District maintains a Capital Improvement Plan and Facilities Rehabilitation Plan. Phase 1 developed for 2011-2016 included $1,761,588 allocated for collections system rehabilitation, corrosion lining, equipment replacement, and pump station upgrades. Phase 2 developed for 2017-2021 includes $1,527,890 for similar projects including repair or replacement of collection system assets. These budgets are reviewed annually and adjusted as priorities shift.

Element 9 – Monitoring, Measurement and Program Modifications 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 evaluation; and

(e) Identify and illustrate SSO trends, including frequency, location, and volume.

The District maintains and monitors the effectiveness of the SSMP, preventative maintenance, and SSO/SSC occurrences with the GIS/CMMS. Trends are produced on an annual or more frequent basis to monitor, adjust, and report effectiveness of the District’s SSMP activities to the Board of Directors and Administrative, Management, and Field Staff. 2014-2017 saw changes in reportable SSOs largely as a result of drought conditions and root intrusion. Preventative maintenance activities were adjusted to meet this changing condition. Continued CCTV assessment of the sanitary sewer system resulted in the 2014 Sewer Manhole Project, and the 2015 and 2017 Sewer Rehabilitation Projects; the latter is slated to be completed by August 2018. The District included Electro Scan Technologies in 2014 to digitally assess trunk sewer lines that had been previously CCTV inspected. In 2016, the District utilized this technology to inspect main line sewers constructed in creek areas to assess potential I&I.

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Additional relevant information of SSMP activities for 2014-2017 is located in Appendix A.

Element 10 – SSMP Program Audits As part of the SSMP, the Enrollee shall conduct periodic internal audits, appropriate to the size of the system and the number of SSOs. At a minimum, these audits must occur every two years and a report must be prepared and kept on file. This audit shall focus on evaluating the effectiveness of the SSMP and the Enrollee’s compliance with the SSMP requirements identified in the subsection (D.13), including identification of any deficiencies in the SSMP and steps to correct them. The District adopted its current SSMP in July of 2014. This report which incorporates the 2016 audit meets the requirement that the District perform an internal audit within two years of formal adoption. This audit evaluates the effectiveness of the current SSMP and MVSD’s compliance with the requirements identified in subsection D.13 of the Order No. 2006-0003-DWQ as amended by WQ 2008-0002 EXEC. Identified deficiencies noted in this audit for 2016 and 2018 are summarized in Appendix C.

Element 11 – Communication Program The Enrollee shall communicate on a regular basis with the public on the development, implementation, and performance of the SSMP. The communication system shall provide the public the opportunity to provide input to the Enrollee as the program is developed and implemented. Public meetings were held prior to the adoption of the current SSMP. The SSMP is located on the State of California, Water Boards CIWQS website, and the District’s website www.mvsd.org. The District’s media outlets including the newsletter, website, social media, and public board meetings are open forums for the public. These outlets provide articles on FOG, pollution prevention, sharps recovery, pharmaceutical drop off sites, and household hazardous waste. Board of Directors meeting times, agendas, board packet materials, and minutes are available to the public on the District’s website.

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Appendixes Table of Contents Figure 1. 2014-2017 SSO Category Distribution .............................................................................. 15 Figure 2. 2014-2017 SSO Cause ....................................................................................................... 18 Figure 3. 2014-2017 Volume of Spills .............................................................................................. 18 Map 1. 2014 SSO Service Area Distribution ..................................................................................... 16 Map 2. 2015 SSO Service Area Distribution ..................................................................................... 16 Table 1. Proactive Maintenance Activities 2014-2017 .................................................................... 20 Table 2. Sewer Service Calls 2014-2017 (non SSOs) ........................................................................ 21 Table 3. Sewage Conveyed 2014-2017 ............................................................................................ 21 Table 4. 2014-2017 Pretreatment Inspections ................................................................................ 22 Table 5. 2014-2017 Collection system Spill Indices ......................................................................... 22 Table 6. 2014-2017 Net Volume Spill Indices .................................................................................. 23

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Appendix A- List of Figures, Maps and Tables

Figure 1. 2014-2017 SSO Category Distribution

Figure 1, demonstrates the SSO Category distribution in 2014 - 2017. 2015 shows an above average increase in reportable SSOs. In general, SSOs/year remain at a steady level given the amount of preventative and trouble spot maintenance the District performs. Maps 1 through 4 demonstrate SSOs distribution for 2014-2017. In 2014, there were three CAT1 SSOs and three CAT3 SSOs. In 2015, there were four CAT1 SSOs and seven CAT3 SSOs. In 2016, there was one CAT1 SSO and five CAT3 SSOs. In 2017, there were five CAT1 SSOs, one CAT2 SSO, and one CAT3 SSO reported. The increase of total SSOs in 2015 is in large part due to root intrusions during drought conditions. The District recognized this increasing trend and adjusted its root foaming for the following year.

0

1

2

3

4

5

6

7

8

2014 2015 2016 2017

SSOs/Year/CAT

CAT1 CAT2 CAT3

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Map 1. 2014 SSO Service Area Distribution

Map 2. 2015 SSO Service Area Distribution

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Map 3. 2016 SSO Service Area Distribution

Map 4. 2017 SSO Service Area Distribution

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Figure 2. 2014-2017 SSO Cause

Figure 2 demonstrates the cause of SSO by category. Over the subsequent years, roots and FOG continue to be major contributors to reportable SSOs. 2015 saw an above average increase in SSOs cause by roots. This increase was attributable to drought conditions. In older pipes such as vitrified clay pipe, roots gain entry through failed joints in mainline and lateral connections. Entry into the system allows the roots to grow, catching rags, paper, grease, and other debris in the mainline which can block the flow of water. These blockages can eventually back the water up to a point where it will surface and spill either from a manhole, cleanout, or into a home.

Figure 3. 2014-2017 Volume of Spills

02468

1012

SSOs by Cause/Year

2014 2015 2016 2017

05,000

10,00015,00020,00025,00030,000

2014 2015 2016 2017

Volume of Spills/Year

Volume contained and returned to Sanitary Sewer System

Volume reaching waters of the State

Volume not contained-not reaching waters of the State

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Figure 3, demonstrates the Volume of Spills for 2014-2017. In the graph, “Volume reaching the Water of the State” for 2017 is much larger than the previous years. The major contributors of this volume were a communication/control issue which occurred during a major storm event in January at the treatment plant. The second event occurred in December, a CAT2 SSO which overflowed for several days prior to the District being notified. The spill was contained within private property and is listed as “volume not contained-not reaching waters of the State. Both contributed to above average discharges.

Figure 4. Average SSO Response Time/Year 2014-2017

Figure 4 reflects the Average SSO Response Time/Year. This measures the average response time upon notification of an issue and being onsite to assess the concern. The District’s goal is to be onsite within a one-hour response window. During off hours, response staff are required to be within 45 minutes of the District. Depending on time of call, road conditions, and other unforeseeable circumstances that can affect response time, averages continue to fall within expected goals.

0

10

20

30

40

50

60

2014 2015 2016 2017

Average SSO Response Time/Year (minutes)

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No Spill Certifications 2014-2017

2014 2015 2016 2017 January

* February

March * * * April * * * May * June

* * July * * *

August * * September * * *

October * * November * * * * December * *

Figure 5. 2014-2017 No Spill Certification Months

Figure 5 reflects the months where a no spill certificate has been issued by the CIWQS online database. It is the District’s responsibility to account for these months when no reportable SSOs occur.

Proactive Maintenance 2014-2017

2014 2015 2016 2017 Scheduled Maintenance 165,790 183,273 215,998 231,451

Trouble Spot Maintenance 80,690 94,058 73,761 90,259 Root Foaming 6,639 13,387 14,890 0

Digital inspection 50,808 28,201 23,770 14,726 SSO Response Cleaning 6,270 9,068 7,073 8,633

Table 1. Proactive Maintenance Activities 2014-2017

Table 1 demonstrates Proactive Maintenance Activities for 2014-2017. These activities include scheduled line maintenance, trouble spot cleaning, root foaming, digital inspections, and SSO response cleaning. Most activities completed throughout the year are planned in advance to accommodate operational schedules. Contractors are used where the District has not invested in specialized equipment or training.

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Sewer Service Calls 2014-2017 (non SSOs)

2014 2015 2016 2017 Private Lateral 21 19 13 26

Odor 7 3 3 4 Other 2 4 7 10

Backup 2 0 1 2 Total SSCs/Year 32 26 24 42

Table 2. 2014-2017 Sewer Service Calls (non SSOs)

Table 2 reflects the Sewer Service Calls (SSCs) that the District has responded to and are not reportable SSOs. These SSCs often result from private lateral issues, odor issues perceived from manholes, homes, or locations not necessarily attributed to MVSD activities or infrastructure, and backups attributed to private lateral issues. The Other category could be water in the street or other perceived issues not associated with MVSD. The District attempts to respond to each SSC as if it is an SSO event to minimize the issue and maximize the effort. As noted in the table, most responses are private lateral issues. The District currently does not report private lateral spills on the CIWQS website. When private lateral issues arise, the District cleans the mainline associated with the connection. When found to be a lateral issue, the homeowner/resident are advised to call a plumbing or rooter service to clear the lateral blockage and/or further investigate with CCTV. When repairs are necessary they are advised to use a licensed plumber/contractor and acquire a permit from MVSD and other local agencies as needed.

Sewage Conveyed/Year

2014 2015 2016 2017 Sewage Conveyed, gals 471,128,000 432,254,000 473,425,000 558,378,000 Unrecovered SSOs, gals 6,549 8,509 3,982 50,270 % Volume Unrecovered 0.0014 0.002 0.0008 0.009

Table 3. Sewage Conveyed 2014-2017

Table 3 demonstrates the volume of sewage conveyed through the collections system and treated at MVSD’s sewage treatment plant for 2014 through 2017. Volumes unrecovered due to SSOs equal less than 0.0090% total volume conveyed.

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2014-2017 Pretreatment Inspections

Annual Goal Initial/Re-Inspections WNs Issued NOVs Issued 2014 40 46 4 1 2015 40 44 1 0 2016 40 44 2 2 2017 40 45 1 3

Table 4. 2014-2015 Pretreatment Inspections

Table 4 reflects the Pretreatment Inspections performed under contract with Central Contra Costa Sanitary District (CCCSD). Contract goals establish 40 inspections per fiscal year. CCCSD has been meeting this goal which includes restaurant (FSE), auto shops, dental operations, businesses, and other FOG producers. Warning Notices (WNs) and Notice of Violations (NOVs) of MVSD’s Code are issued when they occur. Eight WNs have been issued to restaurants or businesses in the service area. These notices give establishments sufficient time to address and implement corrective actions. NOVs issued require immediate action to correct deficiencies. As listed in the table, six NOVS have been issued in the subsequent years. Each NOV has been resolved and verified by the CCCSD Inspector.

Appendix B – Agency Comparisons State, Regional, and Local Comparisons State Water Resource Control Board Collection System Operational Report Collection System Spill Indices

2014-2017 Spill Rate Indices (# spills/100 mi)

CAT1 CAT2 CAT3

Mainlines Laterals Not Specified Mainlines Laterals Not Specified Mainlines Laterals Not Specified

MVSD 4.17 N/A 0.32 0.32 N/A 0.0 4.17 N/A 0.64

State Municipal

(Public) Average 2.64 N/A 1.19 1.17 N/A 0.87 4.63 N/A 1.04

Regional Municipal Average 4.1 N/A 0.61 1.21 N/A 0.65 8.23 N/A 1.6

Table 5. 2014- 2017 Collection system Spill Indices

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Table 5 reflects the average number of spills per 100 miles of gravity sewer for the 2014-2017 calendar years. MVSD indices are equal to the regional average for CAT1 SSOs and below the average for CAT 2 and CAT3 SSOs.

2014-2017 Net Volume Indices (Net Vol in gallons/ 1,000 Capita /yr)

CAT1 CAT2 CAT3

Mainlines Laterals Not Specified Mainlines Laterals Not Specified Mainlines Laterals Not Specified

MVSD 259.74 N/A 294.52 247 N/A 0.0 10.43 N/A 0.08

State Municipal

(Public) Average 2,052.66 N/A 39,598.08 438.55 N/A 312.95 36.89 N/A 39.87

Regional Municipal Average 2,241.46 N/A 1,332.14 123.95 N/A 198.8 29.55 N/A 6.07

Table 6. 2014-2017 Net Volume Spill Indices

Table 6 reflects the average indices of net volume of spills in gallons/1000 capita/year for the 2014-2017 calendar year. MVSD indices are below that state and regional average in CAT1, CAT2, and CAT3 categories.

Appendix C- 2016-2018 SSMP Audit Identified Deficiencies or Actions Plans Summarized below are the identified deficiencies, action plans, recommended updates, or changes to the Sanitary Sewer Management Plan (SSMP) dated July 2014. These updates have been developed from self-audits performed by the District in March of 2016 and July of 2018. Elements identified during the 2016 and 2018 audits and scheduled for implementation with the SSMP re-certification scheduled for July 2019 are as follows: Deficiencies or Action Plan identified in Element 2: Update District Organization chart to reflect recent changes. Update Key positions with phone number directory. Create flow chart depicting MVSD’s current SSO chain of command response.

Deficiencies or Action Plan identified in Element 6:

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Reflect in the current SSMP the regulatory notification officials. Review and update as needed procedures with local Police and Sheriff

Departments Review and update as needed the Overflow Emergency Response Plan

Deficiencies or Action Plan identified in Element 7:

Review GIS FOG and FSE establishment layers, update as needed to meet current

conditions. All Elements of the SSMP

Re-organize July 2014 SSMP to reflect the structure of SSSWDR section D.13 Re-name each element consistent with SSSWDR section D.13

Collection System Compliance Evaluation Inspection The District received a Collections System Compliance Evaluation Inspection on November 28, 2017, and Inspection Report of December 19, 2017, where several additional deficiencies or plans of action were identified. Some if the issues noted are mentioned here as a broader expansion of the SSMP, are mentioned to expand existing programs within the SSMP, and may not necessarily be placed as specific items in the re-certified SSMP of July, 2019.

Ensure adequate staffing levels to meet maintenance goals Review Trouble Spot Maintenance schedules, asset evaluation, and causes Review and implement Root Foaming Program to maximize schedules and

effectiveness Enhance District FOG Prevention Program by targeting FSE, public outreach,

employee training, and equipment Review and implement additional training procedures for SSO recovery, purchase

of additional equipment, and recovery assessment decisions tools Mutual aid assistance with other agencies and municipalities Enhance District GIS layers to include storm drain systems (owned and operated

by other agencies) Ensure District response vehicles are adequate for core function

This audit was performed to evaluate the effectiveness of the SSMP and the District’s compliance with the SSMP requirements in subsection D.13.