City of Olean Wastewater Master Plan

City of Olean
Wastewater Master Plan
Volume 1: Executive Summary
FINAL DRAFT
Prepared for the
City of Olean by
the Planning Team:
Malcolm Pirnie Project: 1313-075
City of Olean, New York
December 2005
The City of Olean
Wastewater Master Plan
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).
1313-075
Final Draft
Dec 2005
The Planning Team:
The City of Olean
Wastewater Master Plan
In 1999 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 1999
through 2002. 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.
1313-075
Final Draft
Dec 2005
The Planning Team:
The City of Olean
Wastewater Master Plan
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 Wastewater Master Plan 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
1313-075
Final Draft
Dec 2005
The Planning Team:
Major Program Elements
1. Treatment Plant Improvements
1a1
a. Phase I - Wet Weather Compliance Projects
b. Phase II - Solids Handling Improvement Projects
1b2
1b1
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
b. Second Tier Priority Interceptor Projects
2a4
2b1
2b2
2b3
2b4
2b5
2b6
2b7
2b8
2b9
c. Long-Term Interceptor Rehabilitation Projects
3. Pump Station Improvements
a. East Olean PS
3a1
b. System-Wide Consolidation, Needs, and EnergySavings 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
4b1
b. Rehab/Reconstruction of Local Sewer System
c. Staff Adjustments to Match Needs (New Hires)
+1
d. Collection System Capital Equipment Purchases(4)
4d1
e. On-Going Investigation and Maintenance(5)
4e1
4b2
4b3
+0.5
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
d. On-Going Investigation and Maintenance
5c1
5d1
6. Sewer Use Ordinance
a. Notification
6a1
b. Education
6a2
c. Enforcement
6a3
Refer to Figure 2 for budgetary project costs.
Legend
Study
Design
Construction/Implementation
Monitoring
Staffing
Staffing Additions
Staffing Subtractions
No Staffing Change
Dec. 2005
+
-
Footnotes:
(1) May be eligible for NYSERDA grant; pump station implementation dependent on results of study.
(2) Pump station implementation dependent on results of study.
(3) May be eligible for FEMA grant and has interdepartment value (police, fire, etc.).
(4) Includes Vactor replacement, trucks, root cutter, flow meters, etc.
(5) Includes CCTV, cleaning, root control, manhole repair, minor dig and replacement projects, etc.
(6) Includes stormwater pump station study and Two Mile Creek storm capacity study.
Wastewater Master Plan - Final Draft
4b4
Year 40
Year 39
Year 38
Year 37
Year 36
Year 35
Year 34
Year 33
Year 32
Year 31
Year 30
Year 29
Year 28
Year 27
Year 26
Year 25
Year 24
Year 23
Year 22
Year 21
Year 20
Year 19
Year 18
Year 17
Year 16
Year 15
Year 14
Year 13
Year 12
Year 11
Year 10
Year 9
Year 8
Year 7
Year 6
Year 5
Year 4
Year 3
Years Following Master Plan Approva
Year 2
Year 1
Figure 1
City of Olean
Wastewater Master Plan
Framework and Initial Sequence
Figure 2
City of Olean
Wastewater Master Plan
Project Summary List
Major Program Elements
1. Treatment Plant
Improvements
2. Interceptor
Improvements
3. Pump Station
Improvements
4. Sewer System Asset
Management Program
5. Storm Sewer Asset
Management Program
6. Sewer Use Ordinance
Project
Number
Project Name/Description
Total Project
Budget (1)
1a1
Wet Weather Improvements at WWTP - Phase I
$8,400,000
1b1
Wet Weather Improvements at WWTP - Phase IIA
$1,900,000
1b2
Wet Weather Improvements at WWTP - Phase IIB
$5,000,000
1c1
WWTP Equipment Replacement - Project 1
$800,000
1c2
WWTP Equipment Replacement - Project 2
$500,000
1c3
WWTP Equipment Replacement - Project 3
$500,000
1c4
WWTP Equipment Replacement - Project 4
$500,000
1c5
WWTP Equipment Replacement - Project 5
$500,000
1c6
WWTP Equipment Replacement - Project 6
$500,000
1c7
2a1
2a2
2a3
2a4
2b1
2b2
WWTP Equipment Replacement - Project 7
First Tier Interceptor Improvements - Project 1
First Tier Interceptor Improvements - Project 2
First Tier Interceptor Improvements - Project 3
First Tier Interceptor Improvements - Project 4
Second Tier Interceptor Improvements - Project 1
Second Tier Interceptor Improvements - Project 2
$500,000
$3,780,000
$570,000
$2,130,000
$1,200,000
$960,000
$1,120,000
2b3
Second Tier Interceptor Improvements - Project 3
$1,480,000
2b4
2b5
2b6
2b7
Second Tier Interceptor Improvements - Project 4
Second Tier Interceptor Improvements - Project 5
Second Tier Interceptor Improvements - Project 6
Second Tier Interceptor Improvements - Project 7
$1,390,000
$630,000
$940,000
$1,860,000
2b8
2b9
3a1
3b1
3c1
3d1
4a1
Second Tier Interceptor Improvements - Project 8
Second Tier Interceptor Improvements - Project 9
East Olean Pump Station Project
System-Wide Consolidation, Needs, and Energy-Savings Study
Pump Station Improvement Projects
Pump Station On-going Investiqation & Maintenance
GIS and Mapping Technology Development
$840,000
$870,000
$2,320,000
$100,000
TBD
$15,000
TBD
4b1
Local Sewer System Rehab/Reconstruction - Project 1
TBD
4b2
Local Sewer System Rehab/Reconstruction - Project 2
TBD
4b3
Local Sewer System Rehab/Reconstruction - Project 3
TBD
4b4
Local Sewer System Rehab/Reconstruction - Project 4
TBD
4d1
4e1
5a1
5b1
5c1
5d1
6a1
6a2
6a3
Collection System Capital Equipment Purchases
Sewer System On-Going Investigation and Maintenance
On-Going Phase III and Phase IV Storm Sewer Projects
Storm Sewer System Needs Study
Storm Sewer System Improvement Projects
On-Going Storm Sewer Investigation and Maintenance
Sewer Use Ordinance - Notification
Sewer Use Ordinance - Education
Sewer Use Ordinance - Enforcement
TBD
TBD
$400,000
$100,000
TBD
TBD
----
Notes/Comments
Wet Stream Process Improvements
Solids Handling Process
Improvements
Solids Handling Process
Improvements
Critical Equipment Replacaments as
identified by Olean WWTP Staff
Budget for future equipment
replacement projects
Budget for future equipment
replacement projects
Budget for future equipment
replacement projects
Budget for future equipment
replacement projects
Budget for future equipment
replacement projects
Budget for future equipment
replacement projects
Two-Mile
Third Street
Dyke Sewer (East Olean)
Misc. MH to MH Replacement
N. Union St. Sewer (Main to RR)
Sullivan/Canal/Reed Sewer
Canal/Shawmut Y Sewer (Shawmut
PS to 4th St. PS)
W. State Street Sewer (W. City limit
to 17th)
Ohio St. & E. River Dr.
Connell/Buffalo/10th St. Sewers
36" & 42" Dyke Sewer Rehab.
New Siphon under Allehgeny River
New Pratt's Brook Sewer
Currently in design phase
-Projects based on previous study
--Projects will based on Asset
Management Program
Projects will based on Asset
Management Program
Projects will based on Asset
Management Program
Projects will based on Asset
Management Program
Projects will based on Asset
Management Program
-Previously bonded and funded
Scope and budget TBD
--City Personnel will complete
City Personnel will complete
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. 2005
Wastewater Master Plan - Final Draft
The City of Olean
Wastewater Master Plan
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.
1313-075
Final Draft
Dec 2005
The Planning Team:
The City of Olean
Wastewater Master Plan
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.
1313-075
Final Draft
Dec 2005
The Planning Team:
The City of Olean
Wastewater Master Plan
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 1996 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 $1.9 million and IIB at $5.0 million.
1313-075
Final Draft
Dec 2005
The Planning Team:
The City of Olean
Wastewater Master Plan
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).
1313-075
Final Draft
Dec 2005
The Planning Team:
Major Components:
N
N
• Installation of additional
aeration basin (sludge
reaeration).
• Conversion of aeration
system to step-feed
during dry weather
conditions; contact
stabilization mode
implemented during wet
weather conditions.
Additional Aeration Basin
(Sludge Reaeration)
Secondary Sludge
From New Clarifier to
Existing Sludge Well
s to
ion or
t
a
c
sf
difi
Mo Basin
h
t
Wi isting -Feed
Ex Step
Secondary Sludge
Pump Station
Additional
Secondary
Clarifier
Splitter Chamber
New Clarifier Effluent
To Existing Chlorine
Contact Tank Feed
Main Influent
Pump No. 2
Mechanical
Bar Screens
• Installation of additional
secondary clarifier.
• Construction of new
splitter chamber and new
secondary sludge pump
station.
• 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
City of Olean
Wastewater Master Plan
December 2005
1313-075
Figure 3
Alternative 1
Contact Stabilization
Major Components:
N
Primary Clarifier
Weirs
Sludge
Thickener
Tank
WAS and
Primary Solids
Secondary Clarifier
Weirs
• Construction of a sludge
thickener tank to co-thicken
primary and secondary
sludge prior to anaerobic
digestion.
• Primary and secondary
clarifier weirs.
• Sludge recycle pump
Nos. 1 and 2.
Recycle Pumps
City of Olean
Wastewater Master Plan
December 2005
1313-075
Figure 4
Phase IIA
Solids Handling Improvements
Major Components:
N
New-generation
belt filter press
installation
• 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
City of Olean
Wastewater Master Plan
December 2005
1313-075
Figure 5
Phase IIB
Solids Handling Improvements
Major Components:
N
Administration
Building
HVAC
• Aerated grit screw
conveyors
Aerated Grit
Screw Conveyors
Primary Sludge
Pumps
City of Olean
Wastewater Master Plan
December 2005
1313-075
• Administration building
heating, ventilation and air
conditioning (HVAC) system
• Primary sludge pumps
Nos. 1 and 2.
Figure 6
Equipment Replacement &
Rehabilitation
The City of Olean
Wastewater Master Plan
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 69.5 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
1313-075
Final Draft
Dec 2005
The Planning Team:
The City of Olean
Wastewater Master Plan
sewers will need to be reclassified to priority 1 or 2 and scheduled for rehabilitation/replacement within the
Master Planning framework.
1313-075
Final Draft
Dec 2005
The Planning Team:
2-2
The City of Olean
Wastewater Master Plan
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 2006. 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.
1313-075
Final Draft
Dec 2005
The Planning Team:
The City of Olean
Wastewater Master Plan
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 9]). 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.
1313-075
Final Draft
Dec 2005
The Planning Team:
Figure 8
Department of Public Works
City of Olean
Wastewater Master Plan
Vehicle Replacement Program
No.
Year
34
35
49
69
16
17
18
19
20
21
22
23
24
25
2002
1993
1997
1988
2002
1986
2002
1964
Dec. 2005
1996
Serial Number
Plate #
$ Amount
GMC Sewer Flusher
Ford Vac-Con Vactor
Ford F250 4x4
Sullair Air Compr.
Chevrolet Impala
Chevy Van
Dodge Ram Pickup
1GDP7H1C52J500309
1FDYR82E2PVA13826
3FTHF26H1VMA23768
004-98032GHH
2G1WF55K329323217
1GCHP32J3G3331363
3B7KF26Z62M309223
K20541
L13342
L13391
$95,000
$200,000
$25,000
$20,000
$22,000
$30,000
$23,960
Replacement
Date
2012
2007
2008
2008
2010
2006
2012
International Tractor
Trailer Homemade
Yale Forklift
5345
A327631
E177B12985T
$25,000
$7,500
$15,000
2008
2011
2016
Make
L88888
K41306
K41256
L13360
L13343
Wastewater Master Plan - Final Draft
Figure 9
Department of Public Works
City of Olean
Wastewater Master Plan
Staffing Chart
SEWER FUND
SEWER FUND
SEWER FUND
2005-06 Staffing Level
2006-07 Staffing Level
2007-08 Staffing Level
Chief STP Operator
Chief STP Operator
POTW Senior
Operator
POTW Senior
Operator
POTW Senior
Operator
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
Station Maintenance
Sewer Operations
WWTF & Pump
Station Maintenance
Sewer Operations
WWTF & Pump
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
9
Princ. Acct.
Clerk
12
Main.
Worker
9
Princ. Acct.
Clerk
12
Main.
Worker
9
7
Main.
Worker
7
Main.
Worker
9
Princ. Acct.
Clerk
Pt. Typist
12
PT $9.98/hr
POTW
Position
Pay Grade
Senior
Operator
15
Laboratory
Dec. 2005
Chief STP Operator
Main. Worker
Main. Worker
9
Main. Worker
9
Main. Worker
9
Main. Worker
9
Collection System
Maintenance
Acct. Clerk
Typist
Main.
Worker
Main.
Worker
POTW
Position
Pay Grade
Senior
Operator
15
Laboratory
Main.
Worker
9
Acct. Clerk
Typist
Main.
Worker
Main.
Worker
9
9
9
Collection System
Maintenance
POTW
Position
Pay Grade
Senior
Operator
15
Laboratory
Main.
Worker
9
9
9
Collection System
Maintenance
Position
Pay Grade
Position
Pay Grade
Position
Pay Grade
Position
Pay Grade
Position
Pay Grade
Position
Pay Grade
WWTF
Operator
11
Assist.
Supervisor
15
WWTF
Operator
11
Assist.
Supervisor
15
WWTF
Operator
11
Assist.
Supervisor
15
Shift
Operator
11
Sen. Str/Swr
Main.
12
Shift
Operator
11
Sen. Str/Swr
Main.
12
Shift
Operator
11
Sen. Str/Swr
Main.
12
Assistant
Operator
9
Str/Swr Main.
III
11
Assistant
Operator
9
Str/Swr
Main. III
11
Assistant
Operator
9
Str/Swr
Main. III
11
Operator
Trainee
7
Str/Swr Main.
II
9
Operator
Trainee
7
Str/Swr
Main. II
9
Operator
Trainee
7
Str/Swr
Main. II
9
Str/Swr Main.
II
9
Str/Swr
Main. II
9
Str/Swr
Main. II
9
Str/Swr
Main. II
9
Wastewater Master Plan - Final Draft
The City of Olean
Wastewater Master Plan
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 1973
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.
1313-075
Final Draft
Dec 2005
The Planning Team:
The City of Olean
Wastewater Master Plan
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.
1313-075
Final Draft
Dec 2005
The Planning Team:
The City of Olean
Wastewater Master Plan
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.
1313-075
Final Draft
Dec 2005
INDEPENDENT ENVIRONMENTAL ENGINEERS, SCIENTISTS AND CONSULTANTS