City of Olean Wastewater Master Plan

Transcription

1 City of Olean Volume 1: Executive Summary FINAL DRAFT Prepared for the City of Olean by the Planning Team: Malcolm Pirnie Project: City of Olean, New York December 2005

2 Introduction A. HISTORICAL PERSPECTIVE The City of Olean s wastewater collection, conveyance, and treatment system is composed of approximately 400,000 feet of separate sanitary sewers (ranging in diameter from 6 to 42 inches), seven pump stations, and a wastewater treatment plant (WWTP). The City also owns an extensive storm water collection and conveyance system. The existing wastewater and storm water systems (collectively referred to as infrastructure ) are extremely valuable assets to the community; however, they require ongoing and planned maintenance and continual improvement in order to maintain their value and goal of protecting public health and the environment. It is estimated that replacement of the City s entire infrastructure would cost in excess of $200 million. The City s Department of Public Works (DPW) is committed to maintaining the existing infrastructure to the best of its ability, and has established a solid track-record of operating and maintaining this infrastructure with minimal cost requirements. However, the majority of the system components are 40 to 100 years old and are currently failing to meet their mission of protecting public health and the environment. As critical elements of the infrastructure deteriorate, wear out, and reach the end of their useful life, additional investment is required. In recent history, sewer rate increases have not kept pace with the required level of infrastructure maintenance investment, and therefore numerous regulatory violations have occurred and the Department s debt service has increased. Further, the cost to protect and maintain this public asset (without a significant capital investment) increases with each passing year. Therefore, this Master Plan provides a road map for restoring and maintaining the City s infrastructure with a goal to improve regulatory compliance, protect public health, reduce discharges to the environment, and ensure that one of the City s most valuable assets is maintained well into the future. As a result of a lack of investment, the wastewater collection system has aged and physically deteriorated. This has led to excess water (from rain and high groundwater table conditions) entering the sanitary collection system during wet weather conditions. The City has had long-standing problems with collection, conveyance, and treatment of these excess wet weather flows. The excess water in the system contributes to basement backups, localized street flooding, and solids washouts and permit violations at the treatment plant. To demonstrate the magnitude of this excess flow, consider that the average flow observed at the WWTP during dry weather conditions is 2.0 million gallons per day (MGD). An indication of the leakage rate and degree of physical deterioration is that during wet weather conditions, the peak instantaneous flows can reach 25 MGD, or over 12 times dry weather flows. In addition to deteriorated and leaking sewers, the City has other pressing infrastructure issues, most notably undersized interceptor sewers and a WWTP that is not of adequate size and overall condition to effectively treat the excess wet weather flows. All of these factors have synergistically impacted the treatment plant in a negative way, resulting in State Pollutant Discharge Elimination System (SPDES) discharge permit violations for key regulated pollutants such as, settleable solids (SS), total suspended solids (TSS) and biological oxygen demand (BOD).

3 In 1 the New York State Department of Environmental Conservation (NYSDEC) issued an Order on Consent (Order) to the City. The Order specifically required that excessive wet weather flows be eliminated and that full SPDES permit compliance be achieved, primarily through inflow and infiltration (I/I) reduction measures. The City retained Malcolm Pirnie, Inc., (Malcolm Pirnie) to devise an inflow abatement plan in response to the Order. Specifically, Malcolm Pirnie was retained to develop and perform a multi-year engineering study to identify potential inflow sources. A series of smoke and dye testing efforts was conducted in the City s system from 1 through These efforts led to the proposal of a four-phase, $1.45-million compliance strategy aimed at removing street catch basins from the sanitary sewer system A four-phase compliance strategy was developed because of concerns over the ability of catch basin removal to provide consistent SPDES permit compliance. The concept of a four-phase program allowed the City to complete initial lower cost and higher expected impact phases (i.e., largest potential return on investment) and then reevaluate the likelihood for compliance before moving forward with the entire program. These efforts served as the basis for a renegotiated Order on Consent, which required the City to implement the four-phase catch basin removal program. The first two phases of the program have been completed at a construction cost of $182,000, resulting in the disconnection of approximately 60 priority catch basins and further investigation of inflow sources for areas identified as having direct or indirect connections during previous smoke testing and dye testing efforts. A significant reduction in treatment plant flows and peaking factors has not been observed as a result of the first two phases of catch basin removal. Additionally, through closed-circuit television (CCTV) investigations, evidence was collected that identified widespread infiltration as the root cause of the excess wet weather flows observed in the City wastewater system, as opposed to inflow. Prior to the implementation of costly and lowimpact inflow reduction measures under Phases III and Phase IV of the program, the City and Malcolm Pirnie decided to re-evaluate the Order and overall compliance approach. In early 2005, the City made a decision to shift toward a more holistic strategic asset management -based approach for addressing excessive wet weather flows and permit compliance issues. In May 2005, the City proposed to the NYSDEC that the remaining two phases of the original compliance plan be put on hold while a Master Plan effort was developed to identify the fastest and most cost-effective method for improving SPDES compliance. The Master Plan approach included an overview of all of the City s major infrastructure elements with the goal of developing a cost-effective approach for achieving permit compliance. The City proposed that the schedule of improvements developed as part of the Master Plan become the new Order on Consent compliance schedule. The NYSDEC approved the Master Plan approach in a June 2005 letter and has recently forwarded to the City a revised Order on Consent that concurs with this approach.

4 B. MASTER PLAN DEVELOPMENT This Master Plan is the result of a collaborative effort between the City of Olean Department of Public Works, Malcolm Pirnie, Inc., and LaBella Associates, P.C. (LaBella), collectively referred to as the Planning Team in this document. The overall goal of the Master Plan is to identify and budget major engineering studies, capital improvements, and other expenditures (i.e., staff and capital equipment) necessary to address the City s aging infrastructure needs with a short-term focus on SPDES permit compliance and a long-term focus on strategic asset management. This plan describes these projects, assigns budgetary costs, and generally prioritizes the work within a long-term framework so that the City has a document that can be used to plan and implement system improvements and develop funding projections (i.e., bonds and rate adjustments). Actual implementation time frames and project priorities are likely to change as the City continues to gather additional data and information; however, this document provides budgetary costs and a proposed precedence of projects that can be considered as changes are required. This Master Plan identifies six major program elements, which are listed below. The party, or parties, responsible for developing the particular element is shown in parenthesis after the element. 1. Treatment Plant Improvements (Malcolm Pirnie and City) 2. Interceptor Improvements (LaBella and City) 3. Pump Station Improvements (City) 4. Sewer System Asset Management Program (City) 5. Storm Sewer Asset Management Program (Malcolm Pirnie and City) 6. Sewer Use Ordinance Enforcement (City) The purpose of this executive summary document is to provide a brief description of each major program element, including a description of recommended engineering and construction projects, the element s impact on achieving regulatory compliance, estimated project costs, and recommended framework and initial sequence of implementation. C. RESULTS The primary product of the is the framework and initial sequence of improvement projects (Figure 1). Figure 1 presents an overall framework for implementing each major program element of the Master Plan, including establishing an initial priority of implementing the various elements. It should be noted that the framework and initial sequence is dynamic and will change annually as additional data are gathered and projects and other work are reprioritized with the goals of improving regulatory compliance and protecting this valuable public asset in the best, most cost-effective way possible. The exception is Phase I improvements (see project 1a1 on Figures 1 and 2) at the WWTP, which must be completed in the very near

5 Figure 1 City of Olean Framework and Initial Sequence Years Following Master Plan Approva Major Program Elements Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year Year 10 Year 11 Year 12 Year 13 Year 14 Year 15 Year 16 Year 17 Year 18 Year 1 Year 20 Year 21 Year 22 Year 23 Year 24 Year 25 Year 26 Year 27 Year 28 Year 2 Year 30 Year 31 Year 32 Year 33 Year 34 Year 35 Year 36 Year 37 Year 38 Year 3 Year Treatment Plant Improvements a. Phase I - Wet Weather Compliance Projects 1a1 b. Phase II - Solids Handling Improvement Projects 1b1 1b2 c. End-of-Useful-Life Equipment Replacements 1c1 1c2 1c3 1c4 1c5 1c6 1c7 2. Interceptor Improvements a. First Tier Priority Interceptor Projects 2a1 2a2 2a3 2a4 b. Second Tier Priority Interceptor Projects 2b1 2b2 2b3 2b4 2b5 2b6 2b7 2b8 2b c. Long-Term Interceptor Rehabilitation Projects 3. Pump Station Improvements a. East Olean PS 3a1 b. System-Wide Consolidation, Needs, and Energy- Savings Study (1) 3b1 c. Pump Station Improvement Projects (2) 3c1 d. On-Going Maintenance 3d1 4. Sewer System Asset Management Program a. GIS and Mapping Technology Development (3) 4a1 b. Rehab/Reconstruction of Local Sewer System 4b1 4b2 4b3 4b4 c. Staff Adjustments to Match Needs (New Hires) d. Collection System Capital Equipment Purchases (4) e. On-Going Investigation and Maintenance (5) d1 4e1 5. Storm Sewer Asset Management Program a. Original Phase III and IV Work 5a1 b. Storm Sewer System Needs Study (6) 5b1 c. Storm Sewer System Improvement Projects 5c1 d. On-Going Investigation and Maintenance 5d1 6. Sewer Use Ordinance a. Notification b. Education c. Enforcement 6a1 6a2 6a3 Legend Refer to Figure 2 for budgetary project costs. Study Design Footnotes: Construction/Implementation (1) May be eligible for NYSERDA grant; pump station implementation dependent on results of study. Monitoring (2) Pump station implementation dependent on results of study. (3) May be eligible for FEMA grant and has interdepartment value (police, fire, etc.). Staffing (4) Includes Vactor replacement, trucks, root cutter, flow meters, etc. Staffing Additions + (5) Includes CCTV, cleaning, root control, manhole repair, minor dig and replacement projects, etc. Staffing Subtractions - (6) Includes stormwater pump station study and Two Mile Creek storm capacity study. No Staffing Change Dec

6 Figure 2 City of Olean Project Summary List Major Program Elements Project Number Project Name/Description Total Project Budget (1) Notes/Comments 1. Treatment Plant Improvements 2. Interceptor Improvements 1a1 Wet Weather Improvements at WWTP - Phase I $8,400,000 Wet Stream Process Improvements 1b1 Wet Weather Improvements at WWTP - Phase IIA $1,00,000 Solids Handling Process Improvements 1b2 Wet Weather Improvements at WWTP - Phase IIB $5,000,000 Solids Handling Process Improvements 1c1 WWTP Equipment Replacement - Project 1 $800,000 Critical Equipment Replacaments as identified by Olean WWTP Staff 1c2 WWTP Equipment Replacement - Project 2 $500,000 Budget for future equipment replacement projects 1c3 WWTP Equipment Replacement - Project 3 $500,000 Budget for future equipment replacement projects 1c4 WWTP Equipment Replacement - Project 4 $500,000 Budget for future equipment replacement projects 1c5 WWTP Equipment Replacement - Project 5 $500,000 Budget for future equipment replacement projects 1c6 WWTP Equipment Replacement - Project 6 $500,000 Budget for future equipment replacement projects 1c7 WWTP Equipment Replacement - Project 7 $500,000 Budget for future equipment replacement projects 2a1 First Tier Interceptor Improvements - Project 1 $3,780,000 Two-Mile 2a2 First Tier Interceptor Improvements - Project 2 $570,000 Third Street 2a3 First Tier Interceptor Improvements - Project 3 $2,130,000 Dyke Sewer (East Olean) 2a4 First Tier Interceptor Improvements - Project 4 $1,200,000 Misc. MH to MH Replacement 2b1 Second Tier Interceptor Improvements - Project 1 $60,000 N. Union St. Sewer (Main to RR) 2b2 Second Tier Interceptor Improvements - Project 2 $1,120,000 Sullivan/Canal/Reed Sewer 2b3 Second Tier Interceptor Improvements - Project 3 $1,480,000 Canal/Shawmut Y Sewer (Shawmut PS to 4th St. PS) 2b4 Second Tier Interceptor Improvements - Project 4 $1,30,000 W. State Street Sewer (W. City limit to 17th) 2b5 Second Tier Interceptor Improvements - Project 5 $630,000 Ohio St. & E. River Dr. 2b6 Second Tier Interceptor Improvements - Project 6 $40,000 Connell/Buffalo/10th St. Sewers 2b7 Second Tier Interceptor Improvements - Project 7 $1,860,000 36" & 42" Dyke Sewer Rehab. 3. Pump Station Improvements 4. Sewer System Asset Management Program 5. Storm Sewer Asset Management Program 6. Sewer Use Ordinance 2b8 Second Tier Interceptor Improvements - Project 8 $840,000 New Siphon under Allehgeny River 2b Second Tier Interceptor Improvements - Project $870,000 New Pratt's Brook Sewer 3a1 East Olean Pump Station Project $2,320,000 Currently in design phase 3b1 System-Wide Consolidation, Needs, and Energy-Savings Study $100, c1 Pump Station Improvement Projects TBD Projects based on previous study 3d1 Pump Station On-going Investiqation & Maintenance $15, a1 GIS and Mapping Technology Development TBD -- 4b1 Local Sewer System Rehab/Reconstruction - Project 1 TBD Projects will based on Asset Management Program 4b2 Local Sewer System Rehab/Reconstruction - Project 2 TBD Projects will based on Asset Management Program 4b3 Local Sewer System Rehab/Reconstruction - Project 3 TBD Projects will based on Asset Management Program 4b4 Local Sewer System Rehab/Reconstruction - Project 4 TBD Projects will based on Asset Management Program 4d1 Collection System Capital Equipment Purchases TBD Projects will based on Asset Management Program 4e1 Sewer System On-Going Investigation and Maintenance TBD -- 5a1 On-Going Phase III and Phase IV Storm Sewer Projects $400,000 Previously bonded and funded 5b1 Storm Sewer System Needs Study $100,000 Scope and budget TBD 5c1 Storm Sewer System Improvement Projects TBD -- 5d1 On-Going Storm Sewer Investigation and Maintenance TBD -- 6a1 Sewer Use Ordinance - Notification -- City Personnel will complete 6a2 Sewer Use Ordinance - Education -- City Personnel will complete 6a3 Sewer Use Ordinance - Enforcement -- City Personnel will complete Notes: 1 - All estimates are in 2005 dollars. Upon finalization of Consent Order and agreement upon precedence of projects appropriate escalation factors will need to be applied to all projects. Dec

7 term, as noted on Figure 1, in order to move the City toward permit compliance and to fulfill the Order requirements. A description of each major program element is provided in Sections 1 through 6 of this document. To complement the program framework, a detailed project summary table was developed for each subcomponent of the Master Plan (Figure 2). The project summary table provides project cost information and comments for each subcomponent of the Master Plan.

8 Program Element 1: Treatment Plant Improvements 1 Malcolm Pirnie conducted a desktop engineering evaluation of the wet stream treatment capacity of the Olean WWTP. Based on this evaluation, the secondary treatment system was identified as the primary bottleneck, with an estimated peak treatment capacity of approximately 7.0 MGD under typical operating conditions. The original design capacity of the WWTP was 5.0 MGD, and peak instantaneous flows in excess of 7.0 MGD are often experienced at the plant. These high flows result in the plant s biomass (or biosolids ) being washed out to the Alleghany River. These washout events, themselves, are a SPDES permit violation; however, these events cause such substantial loss of the biomass material that a single high flow event often causes permit noncompliance to continue for multiple weeks after the storm. The following three alternatives were evaluated to increase the treatment capacity and reduce solids washout during high flow conditions: Alternative 1 Converting the Existing WWTP to Contact Stabilization. Phase I includes modification of the existing plant through construction of a fourth aeration basin; a third, deeper secondary clarifier; and piping, pumps, and concrete channels so that the plant can be operated in a step-feed aeration mode during dry weather and a contact stabilization mode during wet weather conditions. Additionally, headworks improvements are planned to reduce back-ups in the interceptor sewers. These improvements are likely to increase the plant s process capacity to approximately 15 MGD. These improvements would need to be followed by Phase II modifications, which will include upgrades to the plant s solids handling system to accommodate the additional solids generated and retained during wet weather conditions with Phase I modifications in place, address current treatment capacity problems, improve worker safety, and replace aging equipment of the existing solids handling processes. Alternative 2 High-Rate Treatment (HRT). This alternative would include installation of a parallel, sidestream treatment process (e.g., Densadeg or Actiflo), which would be added onto the existing treatment plant to treat wet weather flows in excess of 7.0 MGD. This parallel HRT process would be used only during wet weather flow conditions, and therefore would require additional operations and maintenance attention before, during, and after storm events. Headworks and solids handling system improvements would also be needed for this alternative. Alternative 3 Overflow Retention Facility (ORF). An ORF is a large concrete tank that is used to temporarily store excess wet weather flow in this case flows higher than 7 MGD with a subsequent pump station to return the stored volume to the head of the existing plant for treatment after the wet weather event has passed. Headworks and solids handling system improvements would also be needed for this alternative. Based on a technical and economic evaluation of the alternatives, as well as plant operator, Olean DPW staff, and NYSDEC staff input, Alternative 1 was selected as the preferred alternative. The modifications associated with Phase I of Alternative 1 (see Figure 3) offer the advantages of being in operation during all weather conditions to constantly improve effluent quality (as opposed to only during wet weather as with Alternatives 2 and 3). Alternative 1 requires little or no operator startup time to respond to changing influent conditions, protects the plant s biomass during wet weather conditions, and provides technology that is familiar to, and preferred by, the City s plant operators.

9 1-2 Phase I, as shown on Figure 3, will improve the wet weather capacity of the WWTP and includes the following modifications: Installation of an additional aeration basin Installation of an additional secondary clarifier Installation of a new splitter chamber and a new secondary sludge pump station Modifications to the existing aeration basins Headworks improvements, including: - Removal of the existing bar rack - Replacement of the existing mechanical screens - Replacement of Main Pump No. 2, with a variable-frequency drive (VFD) The schedule for implementation of these improvements is shown under Program Element #1 (Treatment Plant Improvements) on Figure 1. The estimated cost for this improvement is $8.4 million (see Figure 2). Phase II, as shown on Figures 4 and 5, will address the solids handling portion of the WWTP includes the following modifications: Construction of a new sludge thickener tank Replacement of the existing primary and secondary clarifier weirs Replacement of the existing sludge recycle pumps Rehabilitation of the existing anaerobic sludge digesters Rehabilitation of the digester control building Replacement of the existing belt filter press (BFP) with two new-generation BFP units. The sludge thickener tank will improve plant performance during all influent flow conditions by providing solids storage that is not currently available in the plant, improving solids removal efficiency in the primary clarifiers, and preventing primary solids washout into downstream processes, which currently takes up capacity in the secondary treatment process and digesters. The additional storage offered by this modification would improve permit compliance during high solids production periods because the biosolids would be stored as opposed to being flushed out by high flows. A 16 study funded by the New York State Energy Research and Development Authority (NYSERDA), which included an evaluation of the plant s anaerobic digesters, showed that the anaerobic digesters are performing below recommended standards with regard to volatile suspended solids (VSS) removal. Mixing and heating improvements to the digesters would increase the VSS removal efficiency, thereby providing additional process capacity. Additional improvements are needed for the anaerobic digesters, including piping replacement, structural and instrumentation improvements, and worker safety improvements in the digester control building. Addition of new-generation dewatering technology would improve reliability and reduce hauling and operating costs. As shown on Figure 1, solids handling improvements will occur in two stages to reduce rate impacts (Phase IIA and IIB). Figure 2 provides the estimated costs for Phase IIA at $1. million and IIB at $5.0 million.

10 1-3 Based on the equipment assessment conducted by Malcolm Pirnie and the City under the scope of this project, several major equipment items were identified for replacement above and beyond the work included in Phases I and II. These critical equipment replacements include (see Figure 6): Aerated grit screw conveyors Administration building heating, ventilation and air conditioning (HVAC) system (new) Primary sludge pump nos. 1 and 2 The schedule for implementation of these improvements is shown on Figure 1. The estimated cost for these improvements is $800,000 (see Figure 2). While the expenditures for treatment plant improvements are significant, they are the most critical to improving SPDES permit compliance. Therefore, these improvements are scheduled to occur early on in the Master Plan program to bring about an immediate improvement in plant performance and achieve permit compliance as soon as possible. Additional details associated with evaluation of the Olean WWTP are included in the WWTP Summary Report (Volume 2).

11 N Major Components: Installation of additional aeration basin (sludge reaeration). Secondary Sludge Pump Station Secondary Sludge From New Clarifier to Existing Sludge Well Additional Aeration Basin (Sludge Reaeration) With Modifications to Existing Basins for Step-Feed Mechanical Bar Screens Main Influent Pump No. 2 Conversion of aeration system to step-feed during dry weather conditions; contact stabilization mode implemented during wet weather conditions. Installation of additional secondary clarifier. Construction of new splitter chamber and new secondary sludge pump station. Additional Secondary Clarifier New Clarifier Effluent To Existing Chlorine Contact Tank Feed Splitter Chamber Headworks improvements including removal of existing bar rack, and replacement of mechanical screens and main pump no. 2 (with a variable-frequency drive). Existing Chlorine Contact Tank Feed December 2005 City of Olean Figure 3 Alternative 1 Contact Stabilization

12 Major Components: N Primary Clarifier Weirs Construction of a sludge thickener tank to co-thicken primary and secondary sludge prior to anaerobic digestion. Sludge Thickener Tank WAS and Primary Solids Secondary Clarifier Weirs Primary and secondary clarifier weirs. Sludge recycle pump Nos. 1 and 2. Recycle Pumps December 2005 City of Olean Figure 4 Phase IIA Solids Handling Improvements

13 N New-generation belt filter press installation Major Components: Rehabilitation of the anaerobic sludge digesters and control building. Installation of two newgeneration belt filter press units. Installation of chemical feed facilities to enhance settling in secondary clarifiers. Rehabilitation of Existing Anaerobic Sludge Digesters and Control Building Chemical Feed Facilities Installation December 2005 City of Olean Figure 5 Phase IIB Solids Handling Improvements

14 N Administration Building HVAC Primary Sludge Pumps Aerated Grit Screw Conveyors Major Components: Aerated grit screw conveyors Administration building heating, ventilation and air conditioning (HVAC) system Primary sludge pumps Nos. 1 and 2. December 2005 City of Olean Figure 6 Equipment Replacement & Rehabilitation

15 Program Element 2: Interceptor Improvements 2 Interceptor sewers in the City of Olean those sewers greater than 12 in diameter are essential to the conveyance of wastewater to the treatment plant. Interceptor sewers represent 33% of the total 6.5 miles of sewer in the system. Many of these interceptor sewers are over 100 years old, and a catastrophic failure within this system would result in immediate and widespread residential flooding and a direct discharge of untreated wastewater into adjacent waterways. In order to prioritize improvements to the City of Olean s wastewater collection, conveyance, and treatment system, the Planning Team first developed a desktop evaluation to assess the condition of all interceptor sewers. Sections were priority rated from 1 to 5, with 1 representing highest risk for failure/backup and 5 the least risk. These ratings were based on field experience, repair and complaint history, and past studies. Those sewers receiving a rating of 1 or 2 were examined by City staff using recently purchased TV inspection equipment. Over 20,000 linear feet (lf) of interceptor sewers were televised. This effort was essential in order to verify desktop ratings with a physical evaluation, identify lateral locations for future repair/replacement efforts, and assist in the determination of the appropriate method for rehabilitation/replacement. A detailed cost model for interceptor rehabilitation/replacement was developed for priority 1 and 2 rated interceptor sewers. This cost model is based on the following criteria: Sewer depth Sewer diameter Method of rehabilitation/replacement Surface condition above interceptor (i.e., concrete, asphalt, open field) The estimated budget for rehabilitation/replacement of the 20,270 feet of the priority 1 interceptor sewers is $7.7 million. The rehabilitation/replacement of the 25,115 lf of the priority 2 interceptor sewers is $10.1 million. The schedule for implementation of these improvements is shown under major program element No. 2 (Interceptor Improvements) on the Master Plan framework and initial sequence (Figure 1). These improvements are shown on Figure 7. Expenditures for the priority 1 interceptor improvements are scheduled to begin immediately after the first phase of treatment plant improvements. These improvements are scheduled to occur early on in the Master Plan program to assist in maintaining permit compliance through reduction of I/I, and more importantly, to avoid a catastrophic failure within the wastewater collection and conveyance system that could jeopardize public health. Additional details associated with evaluation of the Olean interceptor sewer are included in the Interceptor Improvements Summary Report (Volume 2). The priority list will be reviewed annually to evaluate priority 3, 4 and 5 interceptor sewers based on additional field inspection and TV inspection information. The annual review may reveal that some of these interceptor

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17 2-2 sewers will need to be reclassified to priority 1 or 2 and scheduled for rehabilitation/replacement within the Master Planning framework.

18 Program Element 3: Pump Station Improvements 3 As shown on Figure 1, this program element is composed of the East Olean Pump Station construction project; a system-wide consolidation, needs, and energy-savings study; subsequent pump station improvement projects; and ongoing pump station maintenance. As shown on Figure 1, the East Olean Pump Station is currently undergoing design (see Figure 7 for affected areas), with construction scheduled to begin in the Spring of The estimated project cost is $2,320,000 million. The new East Olean Pump Station is a priority project element because it will: Provide increased capacity to handle a portion of flows from East Olean, the Town of Olean, and the Town of Portville that are currently handled by the Shawmut Pump Station. Provide sufficient capacity to handle all flows noted above, as well as flows currently handled by the Shawmut Pump Station in the event of the Shawmut Station s failure. Minimize the likelihood of sanitary sewer overflows and household basement backups in priority areas of East Olean. Provide additional pumping capacity to allow for future population growth within the geographic areas noted above. The system-wide consolidation, needs, and energy-saving study would be conducted after completion of the East Olean Pump Station construction project. The study would allow for a holistic evaluation of the City s pump stations, including identifying opportunities for pump station consolidation and energy savings, and consider if any additional pump station construction projects are necessary. It is anticipated that this study will identify a set of pump station improvement projects. These projects would likely be similar to those previously identified in the sanitary pump station evaluation prepared by the City pursuant to the Order revision in 2003, which focused on the pump stations vulnerability to power outages and their ability to meet acceptable performance criteria set forth in The Recommended Standards for Wastewater Facilities (a.k.a. Ten States Standards). Projects identified in this evaluation included elimination of the Martha Avenue and Fifteenth Street Pump Stations, and improvements to alarm, telecommunication, emergency pumping, and backup power systems. Pump station maintenance will be an ongoing activity.

19 Program Element 4: Sanitary Sewer System Asset Management Program 4 The City has begun, starting with this Master Plan effort, to implement a total asset management program to better quantify and document the total scope, condition, and value of the City s sanitary sewer system infrastructure. Development of this comprehensive inventory of the entire system and its components will enable the City to evaluate and prioritize rehabilitation projects based on an asset s risk attribute. The City will develop this risk attribute rating for all components of the system by evaluating the system infrastructure, social, economic, and environmental impacts that could occur if a particular asset were to fail. By applying this analytical asset management approach that considers both the likelihood of failure and consequence of failure to individual components and the system as a whole, the City will be able to better analyze where money should be spent and when. This effort, while substantial, will reap the City benefits by allocating available resources at the most appropriate time. The analysis will also provide much-needed support to the City s continued pursuit of grant monies; as the grant funding arena is becoming increasingly competitive and difficult to navigate without programs such as these to demonstrate the need for the funding request. The program will allow prioritization of monies for personnel, equipment, professional services, and capital improvements so that funding is directed in the most appropriate direction for the City to receive the optimum return on investment. As a precursor of this program, an initial personnel and equipment budget has been established to document the internal support that the Master Plan components will need to be implemented effectively over the next 40 years. (See attached Vehicle Replacement Program [Figure 8] and Staffing Chart [Figure ]). The vehicle and equipment replacement will be scheduled according to the replacement program and will be based on available funding. The Master Plan has been staged to limit both rate impacts and impacts on current and proposed City staffing levels. A review of the proposed projects and upgrades throughout the system indicates that the staffing levels will need to only increase from the existing 18 full-time and 1-part time staff to 20 full-time employees. This staffing increase will allow the DPW to be more proactive with maintenance activities (thereby extending the useful life of equipment and delaying more costly capital improvements) and cover the recently taken-over duties of billing by DPW. To complete the sewer system asset management program, the City will have to undertake a thorough investigation of the remaining collection system not included in the Interceptor Study. Due to the limited amount of time and money available, this step could not be completed prior to NYSDEC submittal of the Master Plan. However, the City will utilize the same procedures outlined in the Interceptor portion of this Master Plan on the remainder of the collection system. The City will work diligently to complete the remaining asset management program in a timely manner.

20 Figure 8 Department of Public Works City of Olean Vehicle Replacement Program No. Year Make Serial Number Plate # $ Amount Replacement Date GMC Sewer Flusher 1GDP7H1C52J50030 K20541 $5, Ford Vac-Con Vactor 1FDYR82E2PVA13826 L13342 $200, Ford F250 4x4 3FTHF26H1VMA23768 L1331 $25, Sullair Air Compr GHH $20, Chevrolet Impala 2G1WF55K L88888 $22, Chevy Van 1GCHP32J3G K41306 $30, Dodge Ram Pickup 3B7KF26Z62M30223 K41256 $23, International Tractor 5345 L13360 $25, Trailer Homemade A L13343 $7, Yale Forklift E177B1285T $15, Dec

21 Figure Department of Public Works City of Olean Staffing Chart SEWER FUND SEWER FUND SEWER FUND Staffing Level Staffing Level Staffing Level Chief STP Chief STP Chief STP POTW Senior POTW Senior POTW Senior WWTF Maintenance - Foreman & Crew WWTF Maintenance - Foreman & Crew WWTF Maintenance - Foreman & Crew Laboratory - Foreman & Crew Collection System - Crew Laboratory - Foreman & Crew Collection System - Crew Laboratory - Foreman & Crew Collection System - Crew Sewer Operations WWTF & Pump WWTF & Pump WWTF & Pump Sewer Operations Sewer Operations Station Maintenance Station Maintenance Station Maintenance Position Pay Grade Position Pay Grade Position Pay Grade Position Pay Grade Position Pay Grade Position Pay Grade Supervisor 24 Foreman 14 Supervisor 24 Foreman 14 Supervisor 24 Foreman 14 Princ. Acct. Clerk 12 Worker Princ. Acct. Clerk 12 Worker Princ. Acct. Clerk 12 Worker Pt. Typist PT $.8/hr Worker Acct. Clerk Typist 7 Worker Acct. Clerk Typist 7 Worker Worker POTW Worker POTW Position Pay Grade Worker Position Pay Grade Senior 15 Senior 15 Worker Worker Worker Position Pay Grade Senior POTW 15 Worker Worker Worker Laboratory Collection System Maintenance Laboratory Collection System Maintenance Laboratory Collection System Maintenance Position Pay Grade Position Pay Grade Position Pay Grade Position Pay Grade Position Pay Grade Position Pay Grade WWTF 11 Assist. Supervisor 15 WWTF 11 Assist. Supervisor 15 WWTF 11 Assist. Supervisor 15 Shift 11 Sen. Str/Swr 12 Shift 11 Sen. Str/Swr 12 Shift 11 Sen. Str/Swr 12 Assistant Str/Swr III 11 Assistant Str/Swr III 11 Assistant Str/Swr III 11 Trainee 7 Str/Swr II Trainee 7 Str/Swr II Trainee 7 Str/Swr II Str/Swr II Str/Swr II Str/Swr II Str/Swr II Dec

22 Program Element 5: Storm Sewer Asset Management Program 5 Similar to the steps and benefits outlined in Sanitary Sewer Asset Management Program, the City of Olean is in the process of implementing a Storm Sewer Asset Management Program. The first phase of this program will be composed of selected components of Phase III and IV of the inflow reduction program, a storm system needs study, the subsequent improvement projects defined by that study, and ongoing investigation and maintenance. The City intends to proceed with selected aspects of the Phase III and IV catch basin separation work using its own forces. The work consists of construction of selected new storm sewers, select catch basin separation, and additional CCTV inspection and repair projects. As shown on the cash flow schedule, these selected projects would be implemented over a multi-year period. If during that period of time it is determined that additional wastewater volume reduction is not needed for permit compliance as a result of the implementation of the other major program elements of the Master Plan (e.g., treatment plant, interceptor, and pump station improvements, and the Sewer System Asset Management Program), the City may elect not to pursue further storm sewer improvements at that time. The Catch Basin Separation Summary Report (Volume 2) provides additional detail on the catch basin separation work completed to date. As part of this Master Plan effort, the impact of the City s three designed storm to sanitary overflows on SPDES permit compliance at the plant was assessed. The City of Olean s collection system includes three designed overflows (located on 4th, 8th and 14th Streets), installed by the United States Army Corps of Engineers in 173 as a part of the flood control program. The program was undertaken to protect City properties from flooding during periods of high water levels in the Allegheny River. After a review of previous studies and more recent WWTP flow, rainfall, and river stage data, it was determined that these overflows are unlikely to be routinely contributing flow to the WWTP, and therefore further evaluation and reconstruction of the locations to address SPDES compliance issues at the WWTP is not recommended at this time. The Storm to Sanitary Overflow Summary Report (Volume 2) provides additional detail on this evaluation. The proposed storm sewer system needs study would be composed primarily of stormwater pump station and Two Mile Creek storm capacity studies. The needs study will likely lead to implementation of additional storm sewer improvement projects if they are shown to improve SPDES compliance at the plant. The Master Plan Framework (Figure 1) indicates the precedence of these programs relative to the other components. As these are less likely to directly influence SPDES compliance, they generally have been staged later in the program. However, storm sewer maintenance and investigation will be ongoing activities.

23 Program Element 6: Sewer Use Ordinance Enforcement 6 The City issued a policy statement in 2004 that reasserted the need for the Sewer Use Ordinance (SUO) to be strongly enforced. The City also prepared two mailings regarding the City s intent to vigorously pursue SUO enforcement. In a continuation of these activities, the City intends to purse a Sewer Use Ordinance Enforcement program that is composed of three main components: Notification Education Enforcement Each of these components will be broad and consistent throughout the service area and will primarily include use of hardcopy notices sent along with sewer bills or delivered door-to-door to all City residents. The notices will include educational information regarding the impact of infiltration and inflow (I/I), information on the City s goal of reducing inflow sources, the benefits of reducing inflow, and specific reduction measures. The City has made an investment in new billing and printing equipment to specifically facilitate distribution of these notices. The primary inflow sources that will be noted as candidates for disconnection and/or redirection are roof drains and basement sump pumps. The City has already begun this work both City-wide and on a targeted basis from earlier smoke testing observations. The City intends to continue these efforts in the future. Enforcement will include specific requirements in the hardcopy notice that property owners need to follow to disconnect and/or redirect illegal sources. A specific enforcement schedule will be included for actual inflow reduction implementation and verification through a visual survey conducted by the City, and survey information voluntarily provided by property owners. The notice will include guidance information for inflow redirection procedures should property owners elect to perform the necessary modifications themselves, as well as contact information for a list of qualified contractors that can be utilized. Information will be included to remind property owners that they need to periodically check to make sure that redirected water is infiltrating and is not contributing to other surface water problems. Costs for roof drain and basement sump pump redirections will initially be the responsibility of the property owner. However, the City is evaluating creative funding and rebate options that may offset the costs to residents for redirecting their inflow sources and provide incentive for property owners to participate in voluntary redirection programs. Alternatively, the City is evaluating a new City ordinance that would include an additional assessment for all property owners to cover I/I reduction costs. Property owners would be able to petition the City for a waiver of this assessment if they agree to allow the City to inspect their property and confirm that sump pumps and roof leaders are not connected to the sanitary system. Implementation of this program would be phased with an initial notification, education, and initial inspection period of one to two years and then enforcement of the assessment.

24 6-2 Based on guidance documentation issued by the United States Environmental Protection Agency (USEPA), the average cost for roof drain and basement sump pump redirection are $45 to $75 and $300 to $500 per home, respectively. However, actual costs for inflow reduction are also a function of site-specific factors. As observed on Figure 1, all three components will be initiated immediately following Master Plan approval and would be ongoing activities. INDEPENDENT ENVIRONMENTAL ENGINEERS, SCIENTISTS AND CONSULTANTS