WASTEWATER COLLECTION SYSTEM MANAGEMENT, OPERATIONS … July 2012.pdf · WASTEWATER COLLECTION...

WASTEWATER COLLECTION SYSTEM

MANAGEMENT, OPERATIONS AND MAINTENANCE PROGRAM

(MOM)

TDEC CASE NUMBER 05-0399

BY

CLEVELAND UTILITIES

ORIGINALLY SUBMITTED JUNE 2006

REVISED JUNE 2012

WASTEWATER COLLECTION SYSTEM

MANAGEMENT, OPERATIONS AND MAINTENANCE (MOM) PROGRAM

TABLE OF CONTENTS

Section # Description Page Numbers

1 Major Goals of Wastewater Collection System Management,

Operations and Management (MOM) Program …………………………. 1-1 to 1-7

2 Positions Responsible for Implementing Elements of

MOM Program …………………………………………………………………………… 2-1 to 2-2

3 Personnel Training Procedures……………………………………………………. 3-1

4 Wastewater Collection System Mapping…………………………………….. 4-1

5 Wastewater Collection System Physical Inspection and

Testing Procedure……………………………………………………………………….. 5-1 to 5-17

6 Wastewater Collection System Preventative and Routine

Maintenance Procedures……………………………………………………………. 6-1 to 6-73

7 Wastewater Collection System Corrective Maintenance

Procedures…………………………………………………………………………………. 7-1 to 7-6

8 Wastewater Collection System Maintenance of

Rights-of-Way and Easements……………………………………………………. 8-1 to 8-3

9 Wastewater Collection System Components Inventory

Management Procedures…………………………………………………………… 9-1

10 Identification, Prioritization and Implementation Procedures

For Wastewater Collection System Rehabilitation Actions………… 10-1 to 10-4

11 Standards for Construction of New Additions to and Repair

And Rehabilitation of Wastewater Collection System………………... 11-1

12 Quality Assurance Program for New Additions to

Wastewater Collection System……………………………………………………. 12-1

13 Procedures to Update and Modify MOM Program Elements……… 13-1

Appendix A – Cleveland Utilities Water and Wastewater Division

Organizational Chart

Section 1

Major Goals of Wastewater Collection System Management,

Operations and Maintenance (MOM) Program

Provide an information management system to evaluate wastewater collection system

management, operations and maintenance programs; wastewater customer service

calls; sanitary sewer overflows; the status of wastewater collection system

rehabilitation; and the overall performance of the wastewater collection system.

1. Management Program Information Management Systems

a. Purpose

The purpose of maintaining a Management Program information

management system is to evaluate management, operations and

maintenance programs, customer service calls, sanitary sewer overflows, the

status of system rehabilitation and the overall performance of the sanitary

sewer system. The goal of an effective wastewater collection system

information management system should be to continually improve the

performance of the operations and maintenance and reduce the number of

sanitary sewer overflows, customer complaints, and service interruptions.

b. Scope

This program uses reports and results of the service call tracking system,

operations and maintenance to evaluate and analyze the effectiveness of the

sanitary sewer collection system.

c. Performance Measures

Reasonable goals for the program are to annually incorporate 100 percent of

the information obtained during the previous 12 months from reporting and

recordkeeping into our GIS database and tracking system.

d. Resources Required

This program is staffed with employees that appear in the Cleveland Utilities

Water Division Organizational Chart contained in the Appendix.

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e. Reporting and Recordkeeping

Summary reports for each sanitary sewer drainage area should be completed

and filed with the Wastewater Collections Supervisor and the manager of the

SCOPE-10 program. Reports for each drainage area will be generated

periodically with a minimum of once annually.

2. Operations Programs Information Management System

a. Purpose

The purpose of the Operations Programs information management system is

to acquire and compile information relative to the operational activities of

the sewer collection system and to generate summary reports for review by

the SCOPE-10 program manager.

b. Scope

The Operations Programs information management system compiles

information from the Fats, Oils and Grease control (FOG) program and other

operational programs of Cleveland Utilities. Reports from the FOG program

will be submitted to the Supervisor of Environmental and Regulatory

Compliance (ERC).

Operational reporting generated by Wastewater Collections personnel shall

be submitted to the manager of the MOM program for incorporation into the

GIS database. Reports are coordinated with the Wastewater Collections

Supervisor for scheduled CCTV and cleaning of gravity sewer pipelines.


A performance measure for the FOG program is to perform a minimum of

one annual inspection at each registered FOG customer. An additional

performance measure would be reduction of overflows resulting from fats,

oils and greases.

Reasonable goals for the Operations Programs information management

system include televising and cleaning areas affected by FOG and

incorporating data into the GIS database.

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d. Personnel




Reports are coordinated with the ERC supervisor for the FOG program and

with the Sewer Maintenance Supervisor for scheduling of gravity sewer

pipeline cleaning and inspection. Reports shall also be filed with the SCOPE-

10 manager.

3. Maintenance Programs Information Management System

a. Purpose

There are two purposes in tracking and managing maintenance information.

First, it is indicative of the condition of the wastewater collection system and

can be used to define problem areas in the sewer system. Second, the

information obtained can be used for budgeting purposes in determining

needed expenditures for system preventative maintenance and corrective

maintenance.

b. Scope

This program uses work orders, customer complaints, after hours calls, and

additional maintenance records for tracking and detailed maintenance tasks.

These tasks are initiated with scheduled and emergency maintenance jobs

and are typically completed by Cleveland Utilities employees, although

outside contractors may be required for larger projects. These reports and

results of the program are incorporated into the Management Program

Information Management System to track customer complaints, problem

areas and evaluate areas for rehabilitation.


Performance measures for the Maintenance Programs Information

Management System are focused on response time and the time of

completion for repairs. As a general rule, complaints should be responded to

within three hours and routine repairs should be completed within one day.

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Preventative maintenance should be scheduled so the numbers of man-

hours devoted to preventative maintenance are equal to those devoted to

corrective maintenance. If the time spent on corrective maintenance exceeds

preventative maintenance by a ratio of 2:1 it is indicative that additional

staffing is required to perform preventative maintenance.

d. Personnel




Scheduled maintenance for gravity sewer mains are coordinated and tracked

within the Maintenance Programs Information Management System. This

program issues work orders for routine inspection of assets and tracks results

of said inspections. Summary reports issued within the Sewer Maintenance

department from the Maintenance Connection program are sent to the

Sewer Maintenance Supervisor and the SCOPE-10 manager for review and

evaluation.

Scheduled maintenance for sewer force mains and lift stations are

coordinated and tracked within the Maintenance Connection program.

Summary reports issued within the Maintenance Department from the

Maintenance Connection program are sent to the Facilities Maintenance

Supervisor for review and evaluation.

4. Service Order Management and Tracking System

a. Purpose

The purpose of the Service Order Management and Tracking System is to

properly track and resolve customer complaints for improved service. This

program also assists in compiling information and identifying problem areas

within the sanitary sewer collection system.

b. Scope

The Service Order Management and Tracking System uses the Service Order

database as a source of information. Information from this system will be

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incorporated into the SCOPE-10 program to identify problem areas and

evaluation for rehabilitation.


The accepted performance measures for complaints are time of response

and time of resolution. In emergency situations (life-threatening), the goal is

immediate response to emergency and repair of problem as soon as possible.

For periodic problems, such as overflows, reasonable response to complaints

is within one hour. Dry weather overflows should be mitigated within 24 to

48 hours. Reasonable time to mitigate wet weather overflows is dependent

upon the problem and location. However, each overflow, its’ cause and plans

to mitigate the problem will be addressed for each instance.

For smaller issues, such as odor issues, 24 to 48 hours is a reasonable

response time with resolution of the complaint varying upon identified

problem.

d. Personnel




Each service call is tracked within the Service Order database from time it is

issued until complaint is resolved. The service order is entered into the

Service Order database and each service order is then incorporated into the

GIS mapping system to assist in identifying problem areas or areas requiring

additional inspection.

Completed service orders are presented to the Sewer Maintenance

Supervisor and the manager of the SCOPE-10 program for review.

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5. Performance Indicators

a. Purpose

The purpose of Performance Indicators are to identify and measure

improvements to the wastewater collection system.

b. Scope

Performance Indicators involve maintaining a record of work completed and

progress made in identified areas of the wastewater collection system.

Where reviewed literature provides average values within the industry

Cleveland Utilities’ values will be compared to these.

However, where no performance values indicators have been determined

the values will be used as a means of tracking improvement with a goal of

continual improvement. In those cases, a periodic review and summary of

results is generated and tracked to determine level of improvement and can

indicate what measures need to be taken to affect further progress.

The SCOPE-10 program will serve as a performance value indicator

management system through the flow monitoring we are performing as part

of rehabilitative studies. We will be able to quantitatively measure the

reduction of I/I and see the improvements we are making within the areas

we are flow monitoring.


Performance measures may be found in wastewater literature or at the

Water Environment Foundation’s website www.wef.org. Regardless of the

starting point, continual improvement should be the goal of the program.

d. Personnel




Reports produced through the program are a part of the individual reporting

of the afore-mentioned programs, in that the performance indicators are

tracked by those programs.

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B. Continually improve the performance of wastewater collection system

operations and maintenance and to reduce the number of sanitary sewer

overflows, wastewater customer complaints and service interruptions.

C. Increase the useful life and capacity of the wastewater collection system.

D. More efficiently utilize funds dedicated to the wastewater collection system.

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Section 2

Positions Responsible for Implementation of MOM Program

A. Personnel Training

The planning, scheduling and evaluation of the usefulness of formal training of

personnel responsible for the operation and maintenance of the wastewater collection

system is the responsibility of the Vice-President of Water and Wastewater.

B. Wastewater Collection System Mapping

The production and maintenance of wastewater collection system mapping is the

responsibility of the Engineering and SCOPE-10 manager.

C. Wastewater Collection System Inspection and Testing

The inspection and testing of the wastewater collection system is the responsibility of

the Sewer Maintenance Supervisor and the SCOPE-10 program manager.

D. Preventative and Routine Maintenance of Wastewater Collection System Piping and

Pumping Systems

The preventative and routine maintenance of wastewater collection system piping is the

responsibility of the Sewer Maintenance Supervisor.

The preventative and routine maintenance of the wastewater collection system

pumping stations is the responsibility of the Facilities Maintenance Supervisor.

E. Maintenance of Wastewater Collection System Rights-of-Way and Easements

The maintenance of the wastewater collection system rights-of-way and easements is

the responsibility of the Sewer Maintenance Supervisor. Clearing of right-of-ways and

easements may also be conducted by contract personnel.

F. Materials Inventory

The inventory of materials maintained for the wastewater collection system is the

responsibility of the Controller.

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G. Wastewater Collection System Rehabilitation

1. Prioritization

The prioritization of wastewater collection system rehabilitation is the responsibility

of the Wastewater Rehabilitation Manager with input from the Sewer Maintenance

Supervisor and Vice-President of Water and Wastewater.

2. Implementation

The implementation of wastewater collection system rehabilitation is the

responsibility of the Wastewater Rehabilitation Manager with input from the Sewer

Maintenance Supervisor and Vice-President of Water and Wastewater.

H. Requirements and Standards for Construction of New Wastewater Collection System

Components

The development of requirements and standards for construction of new wastewater

collection system components is the responsibility of the Engineering Manager with

input from the SCOPE-10 manager and Vice-President of Water and Wastewater.

I. Updating MOM Program

The responsibility of updating the MOM is the responsibility of the SCOPE-10 program

manager.

2-2

SECTION 3

Personnel Training Procedures

A. Technical Training Program

Technical training is provided to personnel associated with the wastewater collection

system through seminars and short courses presented by the Tennessee Department of

Environment and Conservation, the Water Environment Federation, the Kentucky-

Tennessee Water Environment Association, National Association of Sewer Service

Companies, and the American Water Works Association.

A. Skills Training Program

Skills training for non-professional personnel associated with the wastewater

collection system is provided by foremen or supervisors.

B. Safety Training Program

Safety training is provided to personnel associated with the wastewater collection

system in monthly safety meetings by the Safety Supervisor.

These safety meetings include the following topics:

• Confined Space Procedures

• General Safety Procedures

• Traffic Management Procedures

• Lock-out/Tag-out Procedures

• Electrical Safety Procedures

• Safety Equipment/PPE Use Procedures

• Safety Performance Program

3-1

Section 4

Wastewater Collection System Mapping

A. Status of Existing Wastewater Collection System Mapping Database

Cleveland Utilities maintains mapping of the existing wastewater collection system in a

geographical information system (GIS) format. The existing wastewater collection

system mapping is complete and current as of May 2012.

A. Procedures for Adding Extensions or Improvements to Wastewater Collection

System to Mapping Database

When an extension, improvement or change occurs to the existing wastewater

collection system as-built drawings will be submitted to the GIS Administrator by

Cleveland Utilities’ inspector or the engineer responsible for the extension or

improvement. The GIS Administrator will collect GPS coordinates and incorporate

the as-built plans into the GIS mapping database.

B. Incorporating Data into the Mapping System

Service orders, after-hour calls, TV work and maintenance will be incorporated into

the GIS mapping database by the GIS Administrator. The data to be incorporated will

be tracked through the Service Order Management and Tracking System and

scheduled maintenance for gravity sewer mains will be tracked within the

Maintenance Programs Information Management System.

4-1

Section 5

Wastewater Collection System Physical Inspection and Testing

Procedure

A. Flow Monitoring

1. Purpose

The purpose of this program is to determine the flow characteristics of a sanitary

sewer segment or drainage basin. Generally, flow monitoring to establish

wastewater collection system assessment priorities entails the monitoring of flow in

drainage basins containing approximately 20,000 lineal feet of gravity sewer pipe.

These basins may be larger or smaller dependent upon the connections and

orientations of the wastewater collection system.

Analysis of flow information, particularly when both wet and dry periods are

included, can reveal the condition of gravity sanitary sewer pipelines and greatly

assist in establishing priorities for gravity sanitary sewer rehabilitation. In addition,

these studies can be used to identify drainage basins which have reserve capacity

and can be used for planning and development.

2. Scope

The location of flow monitors will be determined by the manager of the Scope-10

program and Cleveland Utilities’ consulting engineers. The results obtained from the

flow monitoring program will be incorporated within the Scope-10 program and be

used to determine which basins are in need of further study.

Flow monitors that are located in areas that are determined to need rehabilitation

will be left in place long-term to help quantify the amount of inflow and infiltration

(I/I) that have been removed by the rehabilitation.

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3. Resources Needed

The manager of the Scope-10 program and Cleveland Utilities’ consulting engineers

will determine the placement of the flow meters such that they are properly isolated

and to evaluate field conditions where a flow meter is properly gauging the flow.

The use of the system-wide GIS map and the input of field personnel are important.

4. Method

Preparation: Flow meter locations will be determined by the manager of the Scope-

10 program and Cleveland Utilities’ consulting engineers. The flow meters shall

register flow velocity, depth and quantity of flow in a maximum of 15 minute

intervals and shall be recently calibrated. Flow meters shall be installed with remote

access capability and set with trigger levels such that any increase of flow shall cause

the flow meter to report in 15 minute intervals. This data shall be accessible to

Cleveland Utilities remotely via an internet connection. Cleveland Utilities currently

has five rain gauges that measure precipitation and have remote access through our

SCADA system.

Procedure: The Scope-10 manager and consulting engineer will manage this program

using the following procedure:

A. Flow meter locations will be determined by the manager of the Scope-10

program and Cleveland Utilities’ consulting engineers.

B. Flow sensors should ideally be placed in gravity sewer pipelines with no

bends or side flows for a distance of at least six pipe diameters upstream and

at least two pipe diameters downstream. Manholes should ideally not have

any flows entering other than that which is to be metered.

C. Flow monitoring should continue for at least sixty days and include at least

three substantial rain events, one of which should register a minimum of one

inch of precipitation in a three-hour period.

D. Flow meters should be checked weekly for battery strength and accuracy of

real-time readings and velocity. The accuracy check is accomplished by

comparing field measurements with measured readings.

E. Flow should be analyzed to obtain average and maximum hourly flow rates

during periods of dry and wet weather. Rain gauge information should be

used to define typical wet weather periods and determine the return

frequency of the rain event in question.

F. Preliminary Wastewater Collection System Assessments: Any field

observations made by work crews and operators that may indicate problem

5-2

areas within the wastewater collection system shall be reported and repaired

if applicable.

5. Reports and Recordkeeping

The Flow Monitoring Report should include average and peak hourly flow for each

monitoring location during dry and wet weather. Any rain gauge data included in the

report will be cross-referenced to flow and should show the drainage basins with the

most serious I/I problems.

B. Manhole Inspection

1. Purpose

The primary purpose of conducting manhole inspections on a regular basis is to

locate and identify defects in manholes that may be a source of I/I. However, the

inspections are also used to reveal problems of structural integrity or missing or

damaged covers that could present serious hazards to the public. Inspections may

also show evidence of surcharge in the manhole, indicating potential blockages or

evidence of I/I that could lead to sanitary sewer overflows. The inspection also

allows for verification of size and material of manholes and gravity sewer pipelines,

as well as depths to inverts.

2. Scope

Inspections can be carried out in conjunction with daily operations, during

inspection of gravity sewer mains, or as a part of a SSES study. During the inspection

a Manhole Inspection Form should be completed and submitted for incorporation

into the GIS mapping system.

Manholes should be inspected on a rotating schedule of approximately once every

ten years, which can be tracked through our GIS database. Manhole Inspection

records shall be filed and incorporated into the GIS database so that no manholes are

overlooked.

3. Staffing and Equipment

Manhole inspection typically requires a crew of at least two people, possibly more

dependent upon traffic and if manhole entry is required. In cases where manhole

depths are less than 30 feet they shall be inspected from the top utilizing a pole-

mounted camera. This camera shall record video of the inspection to be submitted

in conjunction with the Manhole Inspection Form.

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A digital camera will be required to take photographs of the manhole at the surface

and of the interior of the manhole. Additional equipment needed will be a standard

set of manhole opening tools. A flashlight will also be required to perform proper

inspections.

4. Method

Preparation: Manhole inspections should be completed during the wetter months of

the year, typically October to April, as inspections performed during this period are

typically more revealing of I/I problems due to elevated water tables and saturated

soil conditions.

If manholes are located in highways or roadways, traffic cones, signs and possibly

flagmen will be needed for traffic control. If several inspections are planned along a

high-traffic area then emergency services (911) should be notified.

Manhole inspections shall be performed from the surface utilizing a pole-mounted

camera capable of recording video unless the depth of the manhole requires

manhole entry. If manhole entry is required then confined space entry equipment

shall be used. During inspection a digital camera shall be used to photograph the

surface and interior of the manhole. During each inspection a Manhole Inspection

Form shall be completed and the videos and photographs shall be attached digitally

to each form.

Procedure:

A. The manhole to be inspected is opened and proper safety precautions

concerning traffic and confined space entry are observed. The manhole

cover is checked for cracks, holes, proper fit or any other defects.

B. The manhole cover ring is checked for alignment with the cone and

inspected for any evidence of leaks at the seal with the cone. The structural

integrity of the ring is checked.

C. The cone section is checked for its’ seal with the barrel section and any

evidence of leakage at the joints. All of the seals in the barrel section of the

manhole are inspected and noted as well as its structural integrity.

D. The connections of the base of the manhole to the barrel section and those

of the gravity sewer pipes to the barrel section are inspected and noted. Any

leakage at these points are noted and estimated for flow rate in gallons per

minute.

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E. Incoming pipe size, material and locations are noted in each manhole. The

inverts of each pipe are recorded on the Manhole Inspection Form.


The Manhole Inspection Form is completed at the time of inspection and all

photographs and video recordings are attached. The Manhole Inspection Form and

all attachments are given to the GIS coordinator for incorporation into the GIS

mapping system.

6. Performance Indicators and Goals

A performance indicator for the Manhole Inspection program is the percentage of

manholes inspected in the drainage basin of interest. This indicator is the number of

manholes inspected within a selected basin divided by the total number of manholes

in the basin. The annual goal is to inspect 100% of the manholes within the selected

drainage basin.

C. Smoke Testing

1. Purpose

The purpose of conducting smoke testing is to locate leaks or points of entry into the

gravity sewer collection system that may be sources of inflow. Typical types of leaks

that are easily found by this procedure are downspouts, yard drains, broken or

misaligned sewer connections, basement sump pumps, untrapped drains, open

cleanouts, and catch basins. This procedure may indicate pipe defects that are also

sources of groundwater infiltration, but because of fluctuation groundwater

elevations this isn’t a reliable indicator of all such sources.

The advantages of utilizing smoke testing to locate illegal connections to the sanitary

sewer collection system is that it is inexpensive and large areas can be inspected

quickly.

2. Scope

This method is most effective when there is minimal flow in the sewer lines. Smoke

testing is not recommended on rainy days or when the sewer mains are flowing at or

near capacity. Additionally winds may disperse smoke before it can be seen or

located, therefore caution should be exercised if smoke testing is performed during

windy conditions.

If smoke is detected it indicates the location of sources of I/I into the gravity sewer

system, however if no smoke is detected it doesn’t necessarily mean there is no I/I

5-5

within the tested pipe segment. In the segments where smoke has been detected at

a defect findings should be verified via CCTV inspection and or dyed-water flood

testing.

3. Resources Needed

At least a three-person crew is required to effectively conduct smoke testing. This

includes one person to operate the blower and at least two people observing the

tested area for smoke. The observers are responsible for noting the location and

intensity of the smoke leaks and entering them into the Smoke Testing Form. Digital

photographs, locating the leak with a marking flag, and measurements should be

taken at each smoke leak and entered into the Smoke Testing Form. The intensity of

the leak should be classified.

The required equipment is a smoke blower with a flat ring seal that can be mounted

onto a standard manhole opening. The air delivery rate for the blower should be at

least 53 cubic feet per second (cfs). Smoke testing should be performed at the rate

of approximately 600 to 800 feet per set-up to ensure smoke has completely filled

the pipes. Shorter reaches should be used for lines larger than 10 inches in diameter

and in highly populated or industrial areas.

4. Method

Preparation: Prior to beginning smoke testing notice shall be given to local fire

departments, police departments and residents that smoke testing is being

conducted in the designated areas. The notice should include the dates of the

testing, an explanation of its’ purpose, the properties of the smoke and contact

information if there are questions concerning the testing. A knowledgeable

representative should be on hand to answer any questions. The notices shall be

distributed at least one to three days prior to testing, preferably by door hanger

notice. Residents should be forewarned that any smoke escaping from their roof

vents is normal and they shouldn’t be alarmed.

Procedure:

A. The smoke blower is placed over the open manhole in the gravity sewer

pipeline section to be tested. Typically one to two, with a maximum of 3,

pipeline sections should be tested at one time for best results. The total

pipe footage per setup should not exceed 600 to 800 feet.

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B. The smoke blower is started, set at full speed and the flow of smoke is

started.

C. Smoke should begin discharging from nearby roof vents within 1 to 2

minutes.

D. At least two observes should be on to hand to note any smoke from

downspouts, catch basins, open cleanouts or any other sources on the

Smoke Testing Form. A neat sketch depicting the smoke sighting should be

drawn on the Smoke Testing Form. The form should also include

measurements to each sighting. Digital photographs should be taken of

each sighting, with the location noted by a marking flag and included with

the Smoke Testing Form.

E. Information gathered during smoke testing is included on the Smoke Testing

Form and given to the GIS coordinator for inclusion into the GIS mapping

system.


The Smoke Testing Form is completed at the time of the test and photographs or

nay notes are attached to the form. Defects and the forms are entered into the GIS

mapping system. Based upon the number and type of defects noted the area may be

selected for subsequent CCTV inspection and or dyed-water flood testing.


A performance indicator for smoke testing is the percent of the drainage basin

smoke tested. This indicator is the number of feet of gravity sewer pipeline tested

divided by the total number of feet of gravity sewer pipeline within the drainage

basin. A realistic goal is to test 100% of the gravity sewer pipeline within the selected

basin, with exception given to large interceptor lines which will be inspected via

CCTV inspection.

D. Closed Circuit Television Inspection

1. Purpose

There are multiple purposes of inspecting gravity sewer pipelines using closed circuit

television inspection (CCTV). Most commonly, CCTV inspections are used to find the

cause of problems in areas troubled by back-ups, overflows or excessive I/I. It can also

be used to locate sewer services or improper or illegal connections. Prior to correcting

these problems CCTV inspections can be used to determine the most applicable

method of rehabilitation. After construction of new sewers it can be used to inspect

the new installation prior to owner acceptance.

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Documentation of CCTV inspections are made on CCTV inspection forms and

supplemented with video recording. Since the position and angle of the TV camera are

controlled by the operator any defects can be identified during the inspection.

2. Scope

CCTV inspections are most effective during periods of normal rainfall, yet when sewer

flow is minimal. This is due to the fact that any infiltration leaks will be seen if the

groundwater table is above the level of the sewer’s crown, yet flow is low enough

such as not to impede the use of the equipment. Visual inspection will not be

complete where the camera is submerged. This could be due to flow depths or

“bellies” in the gravity sewer main.

3. Resources Needed

A two or three person crew is typically sufficient to conduct CCTV inspections,

although additional workers may be required if cleaning or root cutting is required to

perform the inspection. Additional personnel may also be required for traffic control.

It is essential the camera operator is well-trained and experienced in the operation of

the equipment, managing recording of the video and completing the field logs

properly.

The camera equipment includes a waterproof video camera especially made for sewer

inspection that can self-propel itself through the gravity sewer pipeline. The camera

should be capable of panning, tilting and zooming and must have its’ own light source.

A monitor for real-time viewing and guiding the camera through the pipe is also

required.

To record the inspection a digital video recorder should be used which can document

the date, time of day, and length of sewer pipeline travelled in feet. Problems that are

located and identified during the course of the inspection should be documented on

the CCTV inspection form.

Radios or cell phones are helpful to communicate between the personnel at the two

manholes and should be available if needed. Also, if the depth of incoming flows

prohibit CCTV inspection these lines may be plugged temporarily to allow inspection

of the gravity sewer pipeline. Therefore, a portable air compressor and a selection of

plug sizes should be kept on hand.

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4. Method

Preparation: Prior to setting up the video camera equipment it may be necessary to

flush or clean the pipeline to remove accumulated grease and sediment. If the area

being inspected is in a high-traffic area traffic control will be required. 911 emergency

services should be contacted if the period of the inspection will exceed 1 to 2 hours or

is in an extremely high volume area or located in critical areas, such as hospitals.

Procedure:

A. The camera is lowered down into the manhole and positioned to begin

televising. Typically the camera is aligned to TV with the flow of the water.

B. It is extremely important to record accurate measurements, in the event that

defects are located and to locate sewer services. The measurements should

be provided by the counter on the camera. The counter should be set to read

the distance from the center of the beginning manhole to the center of the

ending manhole. These measurements can always be verified by measuring

between the manholes at the surface.

C. The inspection is begun by guiding the camera through the pipeline at a speed

not to exceed ½ foot per second or 30 feet in 1 minute. The video recording

equipment is started and the operator notes the upstream and downstream

manhole and the Pipe ID number. During the inspection the operator should

note any defects, roots, misaligned pipes, obstructions and the location of

sewer services. All observations should be noted at the time of inspection on

the CCTV form.

D. If obstructions are encountered, the obstruction may be removed by the use

of a “jetter” or a root cutter to remove roots or protruding taps. If the

obstruction can’t be removed a “reverse” setup may be performed where the

direction of the televising is reversed.

E. The camera should be able to view 90 to 95 percent of the circumference of

the pipe. If depth of flow prevents this, the upstream side can be temporarily

plugged.


The CCTV Inspection form is completed at the time of inspection and the supporting

video is attached to the form.

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A performance indicator for CCTV inspections is the percent of the drainage basin

inspected. This indicator is the number of feet of gravity sewer pipeline inspected

divided by the total number of feet of gravity sewer pipeline within the drainage

basin. The amount of main inspected will fluctuate based upon results of smoke

testing and flow isolation testing, however typically 40 to 50 percent of the gravity

sewer pipeline will be televised in the selected basin annually.

E. Night Time Flow Isolation Studies

1. Purpose

The purpose of this program is to identify sections of gravity sewer pipelines that are

allowing significant groundwater infiltration into the wastewater collection system.

This is done by selecting small “micro-basins”, typically 5,000 feet or less, within a

selected drainage basin and taking flow measurements with calibrated volumetric

weirs. The studies should be performed at night, when base flows are typically low,

and after a period of significant rainfall, typically at least 1 inch. The presence of

significant flow during this testing signifies substantial amounts of groundwater

infiltration into the wastewater collection system.

2. Scope

This program may use the results of flow monitoring to indicate gravity sewer

pipeline segments or areas where groundwater infiltration is significant. This will be

evident from the hydrographs, where rain-induced increases in flow do not readily

return to normal levels after a rainfall event. The results of this program are used to

determine locations to perform CCTV inspection.

3. Resources Needed

A field crew that is trained and experienced in the tracing of gravity sewer pipelines

and in the operation of portable flow measuring devices is needed. A reliable system

map and portable measuring devices are required to perform the testing. Results

shall be reported on the Flow Isolation Form.

4. Method

Preparation: Test locations should be carefully selected based upon a current

wastewater collection system map. These locations should be located in the field

prior to testing and checked to make sure they are accessible and are suitable for

obtaining accurate night time flow measurements. If located in residential areas

residents should be notified of the work being performed. Flow measurements shall

be taken with calibrated volumetric weirs.

5-10

Procedure: The Scope-10 program manager or the consulting engineer will manage

the program utilizing the following procedure:

A. The Scope-10 program manager or the consulting engineer will select the

location where to perform the flow isolation testing based upon the basin size

from the wastewater collection system map.

B. Testing should ideally be performed following a rain event of at least 1 inch,

the Scope-10 program manager or the consulting engineer should give

approval to perform the testing.

C. The flow measuring devices should ideally be set up in a straight section of

gravity sewer pipeline, with no side flows entering the flow upstream of the

device.

D. During the day the field crew locates the manhole where testing will be

performed.

E. After the evening wastewater flow rates have decreased, usually between

11:00 PM and 5:00 AM, the crew enters the manhole using necessary

confined space entry procedures.

F. The calibrated volumetric weir is installed in the gravity sewer pipeline

upstream of the manhole and an instantaneous flow measurement is made

and recorded on the Flow Isolation Form.

G. The weir is removed from the manhole and the crew moves to the next test

location.


The Flow Isolation Reports are completed and submitted to the Scope-10 manager

and/or the consulting engineer for review. The results of the testing will be used to

identify areas for CCTV Inspection.

F. Service Lateral Investigations

1. Purpose

The purpose of the sewer service lateral investigation program is to identify sources

of I/I entering the wastewater collection system through the sewer service lateral.

This is currently done by smoke testing during the smoke testing of the mainline

sewer. The connection to the mainline sewer is observed during CCTV inspection.

2. Scope

Service lateral investigations involve the connection from the sewer main to the

home. Cleveland Utilities maintains the service lateral from the sewer main to the

5-11

property line. From the property line to the home it’s the property owner’s

responsibility to maintain their service.

As part of the investigation it’s called upon for field personnel to enter private

property to investigate smoke sightings and investigate potentially illegal

connections to the wastewater collection system.

3. Resources Needed

An individual who is knowledgeable of the utility service area, its’ regulations, and

policies concerning permissible discharges into the wastewater collection system.

This individual should be able to review the smoke testing records and determine

whether there is a potential for rainfall induced inflow and whether a disconnection

order is necessary.

4. Method

Preparation: The smoke testing forms, photographs and any other relevant field

information gathered during the smoke testing is needed.

Procedure:

A. The smoke testing form is reviewed by a qualified individual to ascertain

whether connections comply with regulations and policies of Cleveland

Utilities.

B. If an illegal connection to the wastewater collection system is discovered a

notice of disconnection will be issued to the property owner to remove the

connection within 30 days. If the connection isn’t disconnected a second

warning will be issued that states if the connection isn’t disconnected within

the next 30 days water service will be discontinued.


The Smoke Testing Form is completed at the time of the test and photographs or

any notes are attached to the form. Defects and the forms are entered into the GIS

mapping system.

5-12


A performance indicator for service lateral investigations is the percent repairs

completed. This indicator is the number of service laterals repaired divided by the

number of service laterals identified as needing repair.

As part of our sewer rehabilitation plans each sewer lateral in the drainage basin

study will be reviewed. We anticipate performing CIPP lining of the services to the

property line, relaying the service to the property line or simply brushing and

cleaning the services if they are in a good state of repair. Our goal is to rehabilitate

50 to 70 percent of Cleveland Utilities’ portion of the service laterals in the selected

drainage basin identified as needing rehabilitation annually.

G. Manhole Rehabilitation

1. Purpose

The purpose of rehabilitating manholes is to correct defects and structural

deficiencies, but primarily to reduce or eliminate I/I. Historically, a significant

percentage of identified I/I is from defective manhole or manhole/line connections.

2. Scope

The program uses the Manhole Inspection Forms to identify manholes that are in

need of rehabilitation and prioritize the repairs based upon severity of structural

defects and I/I flow rates.

3. Resources Needed

The Scope-10 program manager or the consulting engineer will evaluate the

manhole inspection forms and identify manholes that are most in need of

rehabilitation. The defects noted are then rated according to the quantities of I/I

and severity of structural defects.

A good wastewater collection system map is needed for location of manholes and

locating other pertinent features, such as streams, roadways and structures.

4. Method

Preparation: The Scope-10 program manager or the consulting engineer assembles

all pertinent reports relating to investigations within the designated drainage basin

as well as a wastewater collections system map of the basin.

5-13

Procedure:

A. By taking data from the Manhole Inspection forms the manholes within the

selected drainage basin will be prioritized for repair based upon severity of

structural defects and I/I flow rates. The ground water table, soil saturation,

inspection date and recent weather should all be considered when

reviewing manhole data.

B. Manhole rehabilitation methods should be evaluated for suitability of each

manhole. Any vented covers and covers with large pick holes should be

replaced where feasible. Manhole inserts should be considered in low-lying

areas and chimney and frame seals should be inserted where joint leaks

have been identified. Chemical grouting may be required to stop active I/I.

Epoxy lining coating systems may be necessary where structural defects

indicate the need to seal the wall of the manhole, or if their structural

degradation due to high hydrogen sulfide.

C. The method of rehabilitation is chosen at each manhole based upon the

particular defects, the size, condition and material of the manhole. Some of

the different types of rehabilitation we employ are:

• Manhole Inserts

• Chemical Grouting

• Coating Systems

• Structural Linings

• Corrosion Protection

D. The rehabilitation project is completed by vacuum testing of manholes. The

project inspector shall be on-site during inspection to verify test results.

E. Wastewater flow data is measured by long-term flow monitoring within the

drainage basin.

F. The information relative to rehabilitation is incorporated into the GIS

mapping system.

5-14


The individual Manhole Inspection forms, photographs and videos will be

incorporated into the GIS mapping database. Based upon review of these forms the

manholes will be prioritized for rehabilitation. Once the manholes have been

prioritized and the appropriate means of rehabilitation have been determined a bid

package will be prepared for the manhole rehabilitation. Records will be kept of the

type and date each rehabilitation was performed and those records will be

incorporated into the GIS mapping database.


A performance indicator for manhole investigations is the percent repairs

completed. This indicator is the number of manholes repaired divided by the

number of manholes identified as needing repair.

As part of the sewer rehabilitation plans each manhole in the drainage basin study

will be reviewed. Based upon review of the manhole inspection forms the manholes

will be prioritized for rehabilitation. Once the manholes have been prioritized and

the appropriate means of rehabilitation have been determined a bid package will

be prepared for the manhole rehabilitation. Our goal is to rehabilitate 50 to 70

percent of the manholes in the selected drainage basin identified as needing

rehabilitation annually.

H. Rehabilitation Inspection and Testing

1. Purpose

The purpose of inspecting and testing gravity sewer and manhole rehabilitation

projects is to assure the repair of the gravity sewer pipeline or manholes are

properly completed. If rehabilitative work is performed by a contractor the work is

contingent upon acceptance by Cleveland Utilities.

2. Scope

This program relies upon the initial reporting from the Manhole Inspections, CCTV

Inspections, Service Lateral and Manhole Rehabilitation reports. The results of

these programs will be managed within the SCOPE-10 program for wastewater

collection system rehabilitation.

3. Resources Needed

A registered professional engineer is required to supervise this program. A

knowledgeable inspector, either in-house or third party is required to oversee the

5-15

work being performed to insure that it’s being performed in accordance with the

project plans and specifications. Where the work can’t be directly observed, the

work shall be inspected by CCTV inspection, air and hydraulic testing, and if

applicable grout quantities and pressures. The inspector shall keep detailed notes

of each repair.

Testing of rehabilitated gravity sewer pipelines and manholes shall be performed in

accordance with accepted methods. The National Association of Sewer Service

Companies (NASSCO) has developed inspection guidelines that outline the key

elements of an effective inspection program.

4. Method

Preparation: The Scope-10 program manager or the consulting engineer assembles

all pertinent reports relative to investigations in the selected drainage basin. From

these reports a detailed bid package relative to mainline, sewer and manhole

rehabilitation will be prepared. The package will contain estimated quantities of

repair specific to repair methodology for mainline, sewer and manhole

rehabilitation.

Procedure:

A. Prior to the beginning of the project the contractor shall have a

preconstruction conference with Cleveland Utilities, the consulting

engineer, if applicable, and shall include the project manager, foreman and

inspectors.

B. During the construction phase the inspector may follow the inspection

guidelines of the NASSCO “Specifications and Guidelines”, most current

edition. The inspector shall also abide by project-specific specifications in

the contract documents.

C. The method of testing selected is based on the type of rehabilitation to be

performed and the defects that were to be corrected. Some of the systems

employed for inspecting the success of renovation techniques are as

follows:

• Low pressure air testing

• Vacuum testing

• Hydraulic testing

• Visual inspection

• CCTV inspection

5-16

D. The rehabilitation project is completed and results are confirmed by long

term flow monitoring.

E. All information is entered into GIS database and managed through SCOPE-

10 project.


A report for each manhole and gravity sewer pipeline rehabilitation project should

include the configuration, determination of need for rehabilitation, estimated I/I

flow rates, recommended method of rehabilitation and estimated I/I reduction.

Results of the rehabilitation will be tracked utilizing long-term flow monitoring.


A performance indicator for manhole and gravity line rehabilitation inspection is

the percent rehabilitation completed. This indicator is the number of manholes or

gravity sewer rehabilitated divided by the number of manholes or gravity sewer

identified as needing repair.

Each drainage basin studied will have rehabilitation plans prepared for manholes

and gravity sewer pipelines. Each manhole and pipeline will be assigned a ranking

and the worst gravity sewer mains and manholes will be addressed first. The

amount of gravity sewer main and manhole rehabilitation will vary based upon

which will provide the greatest reduction in I/I. A reasonable goal is to rehabilitate

about 50% of the manholes and gravity sewer pipelines in the selected drainage

basin annually.

5-17

Section 6

Wastewater Collection System Preventative and Routine Maintenance

Procedures

A. Gravity Pipeline Preventative Maintenance Procedures

1. Routine Hydraulic Cleaning Program

a. Purpose

The purpose of this program is to maintain the original hydraulic capacity of

the wastewater collection system. By routinely flushing silt, debris and

accumulated grease from the walls of gravity sewer pipelines, the flow rate of

wastewater in the gravity sewer pipeline should be unchanged from when it

was originally constructed.

b. Scope

This program uses the Maintenance Programs information management

system to accumulate information on gravity sewer pipeline cleanings

conducted on a regular basis. The Maintenance Programs information

management system compiles and tracks work orders, both for preventative

maintenance and for repairs for the purpose of developing budgets and for

scheduling preventative maintenance.

c. Resources Needed

A flusher/rodder truck is needed for routine hydraulic cleaning of the gravity

sewer pipeline system. The operating crew is trained in the operation and

maintenance of this piece of equipment. Information that identifies the areas

of the gravity wastewater collection system in need of hydraulic cleaning is

sent to the crew by the Sewer Maintenance Supervisor based on the results of

manhole inspections and a service order will be completed for the job.

d. Performance Measures

In areas where accumulation of sediment or grease has been identified as

being a problem, hydraulic cleaning should be done on a schedule that will

prevent backups or overflows occurring in response to rainfall induced

6-1

overflows. The establishment of the cleaning schedule is performed by areas

that have historically required regular cleaning in addition to areas that are

identified as having problems by the GIS mapping system, which will identify

service order locations and causes.


Reporting of all preventative maintenance activities should be done on a

service order form. This program uses the findings of field investigations to

identify areas in need of cleaning and produces service orders that are entered

into the Management Systems information management system.

2. Root Control Program

a. Purpose

The purpose of the root control program is to reduce or mitigate the potential

for leaks and blockages created by the intrusion and growth of roots in the

gravity sewer pipelines. Where roots have grown into existing cracks and

holes in pipes, the openings may be enlarged as the roots grow. Where

growth of roots is excessive, the hydraulic capacity of gravity sewer pipelines

will be adversely affected. By controlling the growth of roots before the

obstruct flow more serious problems may be averted.

b. Scope

This program uses information from the Service Order database, CCTV

Inspection program and SCOPE-10 program to identify areas where there may

be root intrusion. Root control activities are documented on service orders

and entered into the GIS database. Either chemical or mechanical means may

be used for the control of roots, and the work may be completed by Cleveland

Utilities personnel or outside contractors. Whoever performs the work shall

complete a service order that will be entered into the GIS database.

c. Resources Needed

A root cutter truck is needed for this program and the crew operating the

truck must be trained in its operation and maintenance. If chemical root

control agents are used, the crew must be fully trained in the use of these

materials and since the chemicals are typically highly corrosive, care must be

taken that no workers downstream are affected.

6-2


A reasonable measure of performance of the Root Control Program is the

percent of root problems identified by CCTV inspection or other means that

have been mitigated by mechanical or chemical means. In a given period of

time this percentage should be at least 70 percent and should be used a goal

for the next time period.


Reporting of all preventative maintenance activities should be done on the

service order form. This program utilizes the findings of field investigations to

identify areas that are in need of cleaning and produces a service order that is

entered into the Maintenance Programs information management system.

3. Manhole Preventative Maintenance

a. Purpose

There are two main purposes of preventative maintenance for manholes.

First, by maintaining structural integrity of the manhole cracks and leaks are

less likely to occur. Second, when I/I is kept to a minimum, voiding behind the

manhole cone or barrel is prevented.

Preventative maintenance for manholes is accomplished primarily by flushing

and cleaning the manhole interior to prevent buildup of sediment, fats, oils

and grease during the performance of routine cleaning of the gravity sewer

pipelines between manholes.

b. Scope

This program utilizes information developed in the Manhole Inspection

Program and the SCOPE-10 program to identify areas where manholes should

be inspected. The adjustment of manholes due to street resurfacing is

coordinated with the City of Cleveland and Bradley County Road Department.

c. Resources Needed




Preventative maintenance of manholes should be performed when gravity

sewer pipeline cleaning or rehabilitation is done. Therefore, a reasonable

6-3

measurement of performance is that when pipeline cleaning or rehabilitation

is done, 100 percent of the adjoining manholes should be subjected to

preventative maintenance.


Reporting of all preventative maintenance activities should be done on the

service order form. This program utilizes the findings of field investigations to

identify manholes in need of preventative maintenance.

B. Pumping Station Preventative Maintenance Procedures

1. Electrical and Control System Maintenance

a. General

The electrical and control systems at each wastewater pumping station are

inspected monthly as part of the preventative maintenance program. The

procedure utilized in this preventative maintenance activity and the reports

of the activities are presented on the following form.

The legend on the next page describes the task coding on the maintenance

reports for each facility.

6-4

Cleveland Utilities

Facilities Maintenance Maintenance Connection

Preventive / Routine Maintenance Legend

1) The first letter represents the frequency of the preventive/routine maintenance.

a. A = Annually

b. BA = Bi-Annually

c. BM = Bi-Monthly

d. H***= Hourly, Plus number of hours

e. M = Monthly

f. Q = Quarterly

g. S = Semiannually

h. W= Weekly

2) The second letter represents the type of preventive/routine maintenance. a. C = Class

b. E = Electrical

c. F = Facilities Maintenance Supervisor

d. M = Mechanical

e. O = Operations

f. P = Process

g. R = Regulatory

h. T = Electronics

i. Z= Water Division Manager

3) The third letter represents the location a. B = Booster Station

b. C= CFP

c. DT= Detention Tank

d. E= Eastside Utility

e. H= HUC

f. L= Lift Station

g. M= Water Division Main Office

h. N= Environmental Sampling Station

i. R= River Station

j. S= Waterville Springs

k. T= Water Storage Tanks

l. W= WWTP

4) The first number represents an ascending means to differentiate PMs.

a. 1 = first PM. b. 2 = second PM.

5) The Booster Stations’ Legend differs in that the first and second number represents the location

of the station. The last number represents an ascending means to differentiate PMs.

Example: MEB11-3 Crown Colony

6-5

Procedure Tasks Sent: 6/1/2012 10:00:21 AM

Report Criteria

ProcedurePK is Lift Station

Task

No Task Action

Procedure

ID

Lift Station

10 Operate each pump and insure that it will duty cycle. WML99

30 Check all controls for proper operation. WML99

50 Check bearings for noise and seals for leakage. WML99

60 Make visual inspection of station and report any unusual conditions. WML99

70 If the station has a backflow device check to ensure that the heat trace is

working to prevent failure.

WML99

6-6

b. Auxiliary Electrical Power Generators

The auxiliary electrical power generators at the Chatata Creek

Wastewater Pumping Station and at the Candies Creek

Wastewater Pumping Station are inspected as part of the

preventative maintenance program. The procedures utilized in

this preventative maintenance activity and the reports of these

activities are presented on the following forms.

6-7


Report Criteria

ProcedurePK is Candies Creek Generator, Dryer, Air Valves

Task

No Task Action

Procedure

ID

Candies Creek Generator, Dryer, Air Valves

10 Generator: WML05-2

20 Insure generator start switch is in automatic position. WML05-2

30 Perform generator operational load test. WML05-2

40 Visually check air inlet and outlet for restrictions. WML05-2

50 Visually check drive belt tension. WML05-2

60 Check battery level. WML05-2

70 Visually check hoses and connections for leaks. WML05-2

80 Record the following. WML05-2

90 Generator Hours WML05-2

100 Generator Fuel Level WML05-2

110 Dryer: WML05-2

120 Blow down the separator. WML05-2

130 Check to be sure the automatic drain on the separator is discharging. WML05-2

140 Inspection: WML05-2

150 Check bearings for noise and seals for leakage. WML05-2

160 Make visual inspection of station and report any unusual conditions. WML05-2

170 Cleaning: WML05-2

180 Remove the level transducer from the still well and clean it. Use a high-

pressure water hose to clean the inside of the still well before putting the

level transducer back in service.

WML05-2

190 CAUTION: WML05-2

200 Before leaving the station site, call the WWTP and confirm the fault status

of the pumps that are in service.

WML05-2

210 Air Valves: WML05-2

220 Check all combination air valves on the force main. Ensure they are in proper

working order.

WML05-

2

6-8


Report Criteria

ProcedurePK is Candies Creek Generator Fuel

Task No Task Action Procedure ID

Candies Creek Generator Fuel

10 Order diesel fuel for Candies Creek Lift Station. WML05-3

20 Order 400 Gallons of fuel to obtain a full tank. WML05-3

6-9


Report Criteria

ProcedurePK is Chatata Creek Generator, Dryer, Air Valves

Task

No Task Action

Procedure

ID

Chatata Creek Generator, Dryer, Air Valves

10 Generator: WML06-2

20 Insure generator start switch is in automatic position. WML06-2

30 Perform generator operational load test. WML06-2

40 Visually check air inlet and outlet for restrictions. WML06-2

60 Check battery level. WML06-2

70 Visually check hoses and connections for leaks. WML06-2

80 Record the following. WML06-2

90 Generator Hours WML06-2

100 Generator Fuel Level WML06-2

110 Dryer: WML06-2

120 Blow down the separator. WML06-2

130 Check to be sure the automatic drain on the separator is discharging. WML06-2

140 Clean off the accumulated dust and dirt on the condenser coil. WML06-2

150 Air Valves: WML06-2

160 Check all combination air valves on the force main. Ensure they are in

proper working order.

WML06-2

170 Inspection: WML06-2

180 Check bearings for noise and seals for leakage. WML06-2

190 Make visual inspection of station and report any unusual conditions. WML06-2

200 Cleaning: WML06-2

210 Remove the level transducer from the still well and clean it. Use a pressure

washer to clean the inside of the still well before putting the level

transducer back in service.

WML06-2

220 CAUTION: WML06-2

230 Before leaving the station site, call the WWTP and confirm the fault status

of the pumps that are in service.

WML06-2

6-10


Report Criteria

ProcedurePK is Chatata Creek Generator Fuel


Chatata Creek Generator Fuel

10 Order diesel fuel for Chatata Creek Lift Station. WML06-3

20 Order 400 Gallons of fuel to obtain a full tank. WML06-3

6-11

2. Mechanical and Physical Systems Maintenance

a. Candies Creek Wastewater Pumping Station

The mechanical and physical systems at Candies Creek

wastewater pumping station are inspected monthly as part of the




6-12


Report Criteria

ProcedurePK is Air Compressor


Air Compressor

10 Inspect and tighten mounting bolts. MML05-5

20 Inpect and tighten vee-belts. MML05-5

30 Check pulley retaining screws. MML05-5

40 Inspect oil for contamination and change if necessary. MML05-5

6-13


Report Criteria


Task

No Task Action

Procedure

ID

Air Compressor

10 Visually inspect the air compressor for signs of wear and damage. WML05-4

20 Drain the condensate from the drop legs, traps, and the tank in the air

distribution system.

WML05-4

30 Check the oil level and add oil if low. WML05-4

40 Clean or replace air filter. WML05-4

50 Check compressor snd air lines for air leaks. WML05-4

60 Check for unusual noise or vibration. WML05-4

70 Clean the cooling surfaces of the compressor. WML05-4

80 Confirm that the safety guards are in place. WML05-4

90 Manually operate the pressure relief valves to see if they are working. WML05-4

6-14


Report Criteria

ProcedurePK is Candies Creek Lift Station

Task

No Task Action

Procedure

ID

Candies Creek Lift Station

10 Cycle all valves to fully closed and open position. MEL05

20 Make visual inspection of station and report any unusual conditions. MEL05

30 Clean around station, trim weeds, and pick up trash. Walk the perimeter

of the fence making sure to remove all leaves and debris.

MEL05

40 Check condition of all controls, relays, and starters. MEL05

50 Tighten all wire lugs and check all electrical connections. MEL05

60 Check the floats for excessive dirt and/or grease and clean with water if

necessary.

MEL05

6-15


Report Criteria

ProcedurePK is Candies Creek Lift Station Motor


Candies Creek Lift Station Motor

5 Mechanical MEL05-2

10 Operate the pump and insure that it will duty cycle. MEL05-2

20 Cycle all valves to fully closed and open position. MEL05-2

30 Check all controls for proper operation. MEL05-2

40 Check bearings for noise and seals for leakage. MEL05-2

50 Electrical. Record the following readings. MEL05-2

60 Megger MEL05-2

70 Ampere (a) MEL05-2

80 Ampere (b) MEL05-2

90 Ampere (c) MEL05-2

100 Hours MEL05-2

6-16


Report Criteria

ProcedurePK is Candies Creek Lift Station Motor


Candies Creek Lift Station Motor







60 Megger MEL05-3




6-17


Report Criteria

ProcedurePK is Candies Creek Lift Station Pump Inspection

Task

No Task Action

Procedure

ID

Candies Creek Lift Station Pump Inspection

5 Pumps: SML05

10 Pull submersible pump, clean and inspect. SML05

20 Drain the oil, flush, and refill the seal chamber with new oil. SML05

30 WARNING: If the seal leaks, the oil casing may be under pressure. Hold

a rag over the oil plug in order to prevent splatter.

SML05

40 Inspect the drained oil. Check for water/oil mixture. SML05

50 Make sure that all screws, bolts, and nuts are tight. SML05

60 Check that the guide bars are vertical. SML05

70 Record the clearance between the impeller skirt and the pump casing. Use

a decimal for the reading and not a fraction.

SML05

80 Clearance SML05

110 WARNING: If there has been leakage, the stator casing may be under

pressure. Hold a rag over the inspection screw to prevent splatter.

SML05

120 Remove the inspection screw and the washer. SML05

130 Place a 1 in the Reading (Final) Column if water is found in the casing

otherwise place a 2 in the Reading (Final) column.

SML05

140 Water Present SML05

150 Make sure the cable clamps are tight. SML05

6-18


Report Criteria

ProcedurePK is Candies Creek Strainer Basket

Task

No Task Action

Procedure

ID

Candies Creek Strainer Basket

10 CAUTION: THIS PM MUST BE DONE WITH A MINIMUM OF

TWO PEOPLE.

WML05-1

20 Pull the strainer basket from the pump pit. WML05-1

30 Remove all material from the basket. WML05-1

40 Clean and inspect basket for damage. WML05-1

50 Install strainer basket back into pump pit. WML05-1

6-19

b. Chatata Creek Wastewater Pumping Station

The mechanical and physical systems at Chatata Creek





6-20


Report Criteria

ProcedurePK is Chatata Creek Lift Station

Task

No Task Action

Procedure

ID

Chatata Creek Lift Station





MEL06




necessary.

MEL06

60 Surge Relief Valve: MEL06

70 Check the dashpot piping for oil leaks. MEL06

80 Check oil level in oil reservoir and make sure the level is at the oil fill

port.

MEL06

90 Open the drain plug on the valve body and drain accumulated water. MEL06

6-21


Report Criteria

ProcedurePK is Chatata Creek Lift Station Motor


Chatata Creek Lift Station Motor







60 Megger MEL06-2




6-22


Report Criteria



Air Compressor

10 Inspect and tighten mounting bolts. MML06-5

20 Inpect and tighten vee-belts. MML06-5

30 Check pulley retaining screws. MML06-5

40 Inspect oil for contamination and change if necessary. MML06-5

6-23


Report Criteria


Task

No Task Action

Procedure

ID

Air Compressor

10 Visually inspect the air compressor for signs of wear and damage. WML06-4

20 Drain the condensate from the drop legs, traps, and the tank in the air

distribution system.

WML06-4

30 Check the oil level and add oil if low. WML06-4

40 Clean or replace air filter. WML06-4

50 Check compressor snd air lines for air leaks. WML06-4

60 Check for unusual noise or vibration. WML06-4

70 Clean the cooling surfaces of the compressor. WML06-4

80 Confirm that the safety guards are in place. WML06-4

90 Manually operate the pressure relief valves to see if they are working. WML06-4

6-24


Report Criteria

ProcedurePK is Chatata Creek Lift Station Pump Inspection

Task

No Task Action

Procedure

ID

Chatata Creek Lift Station Pump Inspection

10 Pull the submersible pump, clean, and inspect. SML06

20 Inspect power cable for any signs of abrasion or damage that might affect

the integrity of the outer jacketing.

SML06

30 Inspect impeller and casing wear rings for unusual wear. Replace parts if

required.

SML06

40 Check the dry cavity for liquid. Replace the seals if more than 1 quart of

liquid drains from the cavity.

SML06

50 Change the oil. Check for water in the oil. Refill with 1/2 gallon of a food

grade oil.

SML06

60 Check the condition of the lifting hooks and the chains. SML06

70 Place a 1 in the Reading (Final) Column if the pump needs to be sent for

service otherwise place a 2 in the Reading (Final) Column.

SML06

80 Pump Service SML06

90 Please Record the following information: SML06

100 Manufacturer: SML06

110 Serial #: SML06

120 Model #: SML06

6-25


Report Criteria

ProcedurePK is Chatata Creek Strainer Basket

Task

No Task Action

Procedure

ID

Chatata Creek Strainer Basket

10 CAUTION: THIS PM MUST BE DONE WITH A MINIMUM OF

TWO PEOPLE.

WML06-1

20 Pull the strainer basket from the pump pit. WML06-1

30 Remove all material from the basket. WML06-1

40 Clean and inspect basket for damage. WML06-1

50 Install strainer basket back into pump pit. WML06-1

6-26

c. Harrison Pike Wastewater Pumping Station

The mechanical and physical systems at Harrison Pike





6-27


Report Criteria

ProcedurePK is Harrison Pike Lift Station

Task

No Task Action

Procedure

ID

Harrison Pike Lift Station



30 Clean around station, trim weeds, and pick up trash and any debris. MEL09




necessary.

MEL09

6-28


Report Criteria

ProcedurePK is Harrison Pike Lift Station Motor

Task

No Task Action

Procedure

ID

Harrison Pike Lift Station Motor






50 Inspect float switches for any material that might be lodged and

impairing their operation.

MEL09-2


70 Megger MEL09-2




110 Hours MEL09-2

6-29


Report Criteria

ProcedurePK is Harrison Pike Lift Station Motor

Task

No Task Action

Procedure

ID

Harrison Pike Lift Station Motor

10 Motor: BAEL09

20 Drain, flush, and refill the seal chamber with new oil. BAEL09

30 Inspect for any signs of water intrusion in the motor seal chamber and seal

cap chamber. On the seal chamber this may be accomplished by inspection

of the oil that was drained. The seal cap chamber should be visually

inspected for moisture.

BAEL09

40 Place a 1 in the Reading (Final) Column if water is found in the casing

otherwise place a 2 in the Reading Final column.

BAEL09

50 Water Present BAEL09

6-30


Report Criteria

ProcedurePK is Harrison Pike Lift Station Pump Inspection

Task

No Task Action

Procedure

ID

Harrison Pike Lift Station Pump Inspection




SML09


required.

SML09



SML09



80 Serial #: SML09

6-31


Report Criteria

ProcedurePK is Lift Station Pump Service Return

Task

No Task Action

Procedure

ID

Lift Station Pump Service Return

10 Pull the pump and notify the Facilities Maintenance Supervisor. BAEL09-1

20 WARNING: PRIOR TO PLACING THE PUMP BACK IN SERVICE

CONFIRM THAT THE LOCKOUT/TAGOUT PROCEDURE IS STILL

IN PLACE.

BAEL09-1

30 Once the pump is ready to be placed back in service place a 2 in the

Reading (Final) Column for the following specification:

BAEL09-1

40 Water Present BAEL09-1

6-32

Procedure Tasks Sent: 6/1/2012 4:03:59 PM

Report Criteria

ProcedurePK is Harrison Pike Lift Station Pump Service

Task

No Task Action

Procedure

ID

Harrison Pike Lift Station Pump Service

10 This PM should be done by a competent service repair shop and should

include the following:

AEL09

20 Completely dismantle the pump and motor. AEL09

30 Clean and inspect all parts. AEL09

40 Inspect all mechanical seal parts. AEL09

50 Replace worn or damaged parts. AEL09

60 Replace ball bearings regardless of condition. AEL09

70 Replace all "O" rings and gaskets. AEL09

80 Inspect motor stator for any sign of abrasion and burned spots on the

winding.

AEL09

6-33

d. Anatole Wastewater Pumping Station

The mechanical and physical systems at Anatole wastewater

pumping station are inspected monthly as part of the




6-33

6-34


Report Criteria

ProcedurePK is Anatole Lift Station

Task

No Task Action

Procedure

ID

Anatole Lift Station







necessary.

MEL01

6-35


Report Criteria

ProcedurePK is Anatole Lift Station Motor


Anatole Lift Station Motor







60 Megger MEL01-2




6-36


Report Criteria

ProcedurePK is Anatole Lift Station Pump Inspection

Task

No Task Action

Procedure

ID

Anatole Lift Station Pump Inspection




SML01


required.

SML01



SML01


60 Please record the following information: SML01


80 Serial #: SML01

90 Model #: SML01

6-37

e. South Industrial Park Wastewater Pumping Station

The mechanical and physical systems at the South Industrial Park





6-38


Report Criteria

ProcedurePK is South Industrial Lift Station

Task

No Task Action

Procedure

ID

South Industrial Lift Station





MEL12




necessary.

MEL12

6-39


Report Criteria

ProcedurePK is South Industrial Lift Station Motor


South Industrial Lift Station Motor







60 Megger MEL12-2




100 Hours MEL12-2

6-40


Report Criteria

ProcedurePK is South Industrial Lift Station Pump Inspection

Task

No Task Action

Procedure

ID

South Industrial Lift Station Pump Inspection




SML12


required.

SML12



SML12


6-41

f. Boyd Street Wastewater Pumping Station

The mechanical and physical systems at Boyd Street wastewater





6-42


Report Criteria

ProcedurePK is Boyd Street Lift Station

Task

No Task Action

Procedure

ID

Boyd Street Lift Station







necessary.

MEL03

6-43


Report Criteria

ProcedurePK is Boyd Street Lift Station Motor

Task

No Task Action

Procedure

ID

Boyd Street Lift Station Motor






45 Supplement the flow by using a water hose to fill the wet well. NOTE:

Make sure to leave an air gap between the hose and the level in the wet well

to prevent backflow. Make sure pumps alternate from lead to lag between

cycles.

MEL03-2


60 Megger MEL03-2




100 Hours MEL03-2

6-44


Report Criteria

ProcedurePK is Boyd Street Lift Station Pump Inspection

Task

No Task Action

Procedure

ID

Boyd Street Lift Station Pump Inspection

10 Pull submersible pump, clean, and inspect. SML03



SML03


required.

SML03



SML03


6-45

g. Breckenridge Wastewater Pumping Station

The mechanical and physical systems at Breckenridge





6-46


Report Criteria

ProcedurePK is Breckenridge Lift Station

Task

No Task Action

Procedure

ID

Breckenridge Lift Station


20 Make visual inspection of station and report any unusual conditions and

any debris.

MEL04

30 Clean around station, trim weeds, and pick up trash. MEL04




necessary.

MEL04

6-47


Report Criteria

ProcedurePK is Breckenridge Lift Station Motor

Task

No Task Action

Procedure

ID

Breckenridge Lift Station Motor









cycles.

MEL04-2


60 Megger MEL04-2




100 Vibration A MEL04-2

110 Vibration B MEL04-2

6-48

h. East Cleveland Wastewater Pumping Station

The mechanical and physical systems at East Cleveland





6-49


Report Criteria

ProcedurePK is East Cleveland Lift Station

Task

No Task Action

Procedure

ID

East Cleveland Lift Station





MEL07




necessary.

MEL07

6-50


Report Criteria

ProcedurePK is East Cleveland Lift Station Motor

Task

No Task Action

Procedure

ID

East Cleveland Lift Station Motor









cycles.

MEL07-2


60 Megger MEL07-2




100 Hours MEL07-2

6-51


Report Criteria

ProcedurePK is East Cleveland Lift Station Pump Inspection

Task

No Task Action

Procedure

ID

East Cleveland Lift Station Pump Inspection




SML07


required.

SML07



SML07



70 Serial #: SML07

80 Model #: SML07

6-52

i. Park Terrace Wastewater Pumping Station

The mechanical and physical systems at Park Terrace wastewater





6-53


Report Criteria

ProcedurePK is Park Terrace Lift Station

Task

No Task Action

Procedure

ID

Park Terrace Lift Station





MEL10




necessary.

MEL10

6-54


Report Criteria

ProcedurePK is Park Terrace Lift Station Motor

Task

No Task Action

Procedure

ID

Park Terrace Lift Station Motor









cycles.

MEL10-2


60 Megger MEL10-2




100 Hours MEL10-2

6-55


Report Criteria

ProcedurePK is Park Terrace Lift Station Pump Inspection

Task

No Task Action

Procedure

ID

Park Terrace Lift Station Pump Inspection




SML10


required.

SML10



SML10


6-56

j. Gaut Street Wastewater Pumping Station

The mechanical and physical systems at Gaut Street wastewater





6-57


Report Criteria

ProcedurePK is Gaut Street Lift Station

Task

No Task Action

Procedure

ID

Gaut Street Lift Station





MEL08




necessary.

MEL08

6-58


Report Criteria

ProcedurePK is Gaut Street Lift Station Motor


Gaut Street Lift Station Motor







60 Megger MEL08-2




100 Hours MEL08-2

6-59


Report Criteria

ProcedurePK is Gaut Street Lift Station Pump Inspection

Task

No Task Action

Procedure

ID

Gaut Street Lift Station Pump Inspection




SML08


required.

SML08



SML08


6-60

k. Baldwin Street Wastewater Pumping Station

The mechanical and physical systems at Baldwin Street





6-61


Report Criteria

ProcedurePK is Baldwin Street Lift Station

Task

No Task Action

Procedure

ID

Baldwin Street Lift Station





MEL02




necessary.

MEL02

6-62


Report Criteria

ProcedurePK is Baldwin Street Lift Station Motor


Baldwin Street Lift Station Motor







60 Megger MEL02-2




100 Hours MEL02-2

6-63


Report Criteria

ProcedurePK is Baldwin Street Lift Station Pump Inspection

Task

No Task Action

Procedure

ID

Baldwin Street Lift Station Pump Inspection




SML02


required.

SML02



SML02




80 Serial #: SML02

90 Model #: SML02

6-64

l. Timbercreek Wastewater Pumping Station

The mechanical and physical systems at Timbercreek wastewater





6-65


Report Criteria

ProcedurePK is Timber Creek Lift Station

Task

No Task Action

Procedure

ID

Timber Creek Lift Station





MEL13




necessary.

MEL13

6-66


Report Criteria

ProcedurePK is Timber Creek Lift Station Pump Inspection

Task

No Task Action

Procedure

ID

Timber Creek Lift Station Pump Inspection




SML13


required.

SML13



SML13


6-67


Report Criteria

ProcedurePK is Timber Creek Lift Station Motor

Task

No Task Action

Procedure

ID

Timber Creek Lift Station Motor









cycles.

MEL13-2


60 Megger MEL13-2




100 Hours MEL13-2

6-68

C. Fats, Oils and Grease Control Program

1. Overview

Fats, oil and grease are a prohibited discharge and are monitored under

Cleveland Utilities Pretreatment Program. Periodic review of applications for

sewer service and coordination with the plumbing inspector are used to update

facilities requiring inspection within Cleveland Utilities wastewater service area.

The current number of facilities identified in the inspection program is 177.

These facilities are routinely inspected for compliance with the program and

additional inspections are performed on an as-needed basis. Larger facilities are

inspected about every six months, while smaller facilities may be inspected a

minimum of once a year.

2. Policy

Disposal of oil by discharge to the wastewater collection system is prohibited

under the City of Cleveland Sewer Use Ordinance at Section 18-107. Oils include

automotive lubricating oils, transmission oils, transmission and brake fluid,

other industrial oils, and vegetable oils used in a restaurant or food processing

facility.

Cleveland Utilities contacts all wastewater discharge permit holders,

restaurants, service stations, septic tank pumpers, commercial food processors,

oil tank firms and transporters, and others, as appropriate, by letter as often as

needed to advise them of requirements for oil and grease discharge control.

These dischargers are also informed of approved oil and grease disposal options

available in the Cleveland vicinity. The dischargers of oil and grease waste are

required to provide an equivalent primary treatment based on gravity

separation of visible and floating oil and grease and oil and grease sludge from

wastewater discharges. Such pretreatment processes are subject to the best

management practices as required by Section 18-107 (8f) of the City of

Cleveland Sewer Use Ordinance and approval by Cleveland Utilities. Discharges

are subject to monitoring, entry, inspection, reporting and other requirements

as determined by Cleveland Utilities at its discretion. These discharges may be

required by Cleveland Utilities to apply for industrial waste discharge permits if

Cleveland Utilities determines that the dischargers are a source of prohibited

pollutants, toxic pollutants in toxic amounts, or are otherwise controlled by

federal or state regulations. All dischargers of oil or grease are subject to all

6-69

enforcement and penalty provisions of the City of Cleveland Sewer Use

Ordinance.

3. Procedure

All identified restaurants are required to keep a log of service to grease traps.

This log should contain the date of pumping or cleaning, who conducted the

service and where the material was disposed. These records are reviewed on a

routine inspection schedule. Service is required to be performed on an annual,

semi-annual, quarterly or monthly schedule dependent upon loading conditions

at each location. Service frequencies are required to be increased on a site-

specific basis. This is determined by gravity sewer pipeline inspections and

response to any gravity sewer pipeline stoppages.

4. Responsible Personnel

Currently, the Pretreatment Program is managed by the Environmental and

Regulatory Compliance (ERC) supervisor and is responsible for all aspects of the

pretreatment program including the Fats, Oils and Grease (FOG) Control

Program. The FOG pretreatment coordinator conducts all field sampling and

inspection and recordkeeping activities.

D. Air Valve Preventative Maintenance Program

The air release valves installed on the force main pipelines are inspected as part of

the preventative maintenance program. The procedures utilized in these

preventative maintenance activities are presented on the following forms.

6-70


Report Criteria

ProcedurePK is Chatata Creek Air Relief Valve

Task

No Task Action

Procedure

ID

Chatata Creek Air Relief Valve

10 This procedure is for the ARI Air Relief Valve. All other valves should

be back-flushed with water.

SML06-2

20 Shut the isolating valve underneath the air valve. SML06-2

30 Open pressure relief valve and make sure that internal pressure is

released.

SML06-2

40 Open all four screws (22) on the top cover of the air valve. SML06-2

50 Pull out the mechanism (together with the cover)( 1-15 + 17). Rinse it

and the inner part of the body.

SML06-2

60 Reassemble back and tighten the screws. Pay attention to correct

placement of the seal's O-ring.

SML06-2

70 Close the relief valve and re-open the isolating valve. SML06-2

80 Please provide the following information: SML06-2

90 Serial # SML06-2

6-71


Report Criteria

ProcedurePK is Harrison Pike Air Relief Valve

Task

No Task Action

Procedure

ID

Harrison Pike Air Relief Valve

10 This procedure is for the ARI Air Relief Valve. All other valves should

be back-flushed with water.

SML09-2

20 Shut the isolating valve underneath the air valve. SML09-2

30 Open pressure relief valve and make sure that internal pressure is

released.

SML09-2

40 Open all four screws (22) on the top cover of the air valve. SML09-2

50 Pull out the mechanism (together with the cover)( 1-15 + 17). Rinse it

and the inner part of the body.

SML09-2

60 Reassemble back and tighten the screws. Pay attention to correct

placement of the seal's O-ring.

SML09-2

70 Close the relief valve and re-open the isolating valve. SML09-2

80 Please provide the following information: SML09-2

90 Serial # SML09-2

6-72


Report Criteria

ProcedurePK is Air Relief Valve

Task

No Task Action

Procedure

ID

Air Relief Valve

10 Check air release valve for any leaks or overflows. QML04

20 Shut off the inlet valve. QML04

30 Open the blow off valve and observe. If fluid drains out of the valve

body rapidly, flushing is not required.

QML04

40 Should heavy suspended solids and grease be anticipated the valve

should be flushed.

QML04

6-73

Section 7

Wastewater Collection System Corrective Maintenance Procedures

A. Complaint Management Program

1. Purpose

There are two purposes for maintaining a Complaint Management Program. The first

is to properly track and resolve customers’ complaints so service is improved. The

second is to acquire information for locating problems areas within the wastewater

collection system.

2. Scope

This program provides information for the identification, prioritization and

implementation of procedures for wastewater system rehabilitation actions to assist

in determining drainage basins that are experiencing capacity problems.

3. Method

When a complaint is received, the information is incorporated into a service order.

The service order is provided to the Wastewater Collections Supervisor or the after-

hours personnel for investigation and resolution of the complaint.

If it’s determined the Cleveland Utilities wastewater collection system is the cause of

the problem, the pipeline is inspected by CCTV within 24 hours. If the complaint

involves a sewer overflow, the Dry Weather Sanitary Sewer Overflow Response Plan

is implemented.

Upon completion of the work and resolution of the complaint, the completed

service order is provided to the Wastewater Collections Supervisor or the after-

hours supervisor.

4. Records and Recordkeeping

The service order is generated once the complaint is received. The completed

service order is provided to the Wastewater Collections Supervisor or the after-

hours supervisor. The administrative personnel will close out the service order in the

Service Order Database. The Service Order Database is connected to the GIS

mapping database and the completed service order will then be tied to the

complaint location.

7-1

This information will be available to the SCOPE-10 manager for follow-up, if

necessary, and inclusion into the Maintenance Program on a regular basis.

B. Corrective Maintenance Program

1. Pumping Station Repairs

a. Purpose

Repairs, or unscheduled maintenance, to wastewater pumping stations is

administered at Cleveland Utilities as part of the Maintenance Connection

program. The Maintenance Connection program will manage and track all

repairs made to the wastewater pumping stations.

b. Scope

Through the Maintenance Connection program work orders are generated and

the program compiles information on unscheduled repairs to wastewater

pumping stations.

c. Resources Needed

A maintenance crew is available at all hours and during weekends to respond to

emergency calls for repairs. In addition, all the tools and equipment that are

normally used by the field maintenance crews must be made available to them

at all hours of the day.


Performances measures for corrective maintenance are focused on the time of

response and the time of completion of repairs of identified problems.

Generally, response to emergency reports and repair or correction will be

performed as soon as possible. For problems such as overflows, a reasonable

response to complaints is within one hour. Dry weather overflows should be

mitigated within 24 to 48 hours. Reasonable time to mitigate wet weather

overflows is dependent upon the problem and location.

e. Records and Recordkeeping

The Maintenance Connection program comprises the main part of the

Maintenance Programs information management system. Summary reports

from the Maintenance Connection program are sent to the Facilities

Maintenance Supervisor for review.

7-2

2. Dry Weather Sanitary Sewer Overflow Response Plan

a. Purpose

The purpose of the Dry Weather Sewer Overflow Response Plan is to:

1. Establish procedures to minimize public health impacts when a sanitary sewer

overflow discharges during dry weather.

2. Establish a plan of action to be taken when a sanitary sewer overflow

discharges during dry weather.

3. Establish procedures for notification of potentially affected private owners

when a sanitary sewer overflow discharges during dry weather.

4. Establish procedures for notification to the public when a sanitary sewer

overflow discharges during dry weather.

5. Establish procedures for notification of downstream users when sanitary

sewers overflow into waters of the State of Tennessee during dry weather.

b. Procedures to Minimize Public Health Impacts of Dry Weather Sanitary Sewer

Overflows

If a sanitary sewer overflow (SSO) occurs during dry weather, the Wastewater

Collections Supervisor, ERC supervisor and SCOPE-10 manager will evaluate the

SSO discharge to determine if a public health risk due to the SSO discharge

exists. This evaluation will include consideration of the following factors:

1. Location of the Discharge

2. Potential for human contact

3. The nature of the receiving waters

4. Pollutants in the discharge

The SSO discharge will be considered to present a public health risk and actions

must be taken immediately to stop the SSO discharge if a SSO:

1. Discharges to areas with a reasonable potential for human contact.

2. Discharges to sensitive waters or high exposure areas

3. Creates identifiable environmental impact, such as a fish kill.

In interpreting the conditions described for which a SSO discharge during dry

weather will be considered a public health risk, Wastewater Collections

Supervisor, ERC supervisor and SCOPE-10 manager will consider that “sensitive

7-3

waters”, include public drinking water intakes and their designated protection

areas, swimming beaches and waters where swimming occurs, shellfish beds,

designated Outstanding National Resources Waters, National Marine Sanctuaries,

waters with federal, state and local parks, and waters containing threatened or

endangered species and their habitat; and the “high exposure areas” include

sewage backups into buildings and sewer releases to other areas with a high

potential for human contact. The only “sensitive waters” known to exist within

the City of Cleveland sanitary sewer service area are South Mouse Creek within

Tinsley Park, and unnamed tributary of South Mouse Creek in Deer Park,

Candies Creek in Fletcher Park and South Mouse Creek in the Cleveland/Bradley

County Greenway.

If a public health risk is identified on the basis of the hereinbefore described

evaluation procedure the Wastewater Collections Supervisor, ERC supervisor or

SCOPE-10 manager will immediately implement one of the following short-term

remediation activities:

1. Clean the segments of the sanitary sewer pipeline draining to the SSO

discharge location, in order to stop the SSO discharge, utilizing hydraulic

cleaning techniques or mechanical cleaning techniques followed by CCTV

inspection of the cleaned segments of the sanitary sewer pipeline to identify

and further maintenance needs in these segments to prevent recurring SSO

discharges.

2. Re-route wastewater flow from a manhole upstream from the SSO discharge

to a manhole downstream of the SSO discharge utilizing a bypass pumping

system so as to conduct an inspection of the affected segments of the sanitary

sewer system pipeline by CCTV inspection to identify the cause of the SSO

discharge, and take the required action to repair the defect to alleviate the

SSO discharge and prevent future discharges at that location.

3. Repair or replace inoperative pumps and wastewater pumping stations that

fail and cause SSO discharges upstream from the wastewater pumping station

or at the wetwell.

7-4

c. Plan of Action to Dry Weather Sanitary Sewer Overflow Discharges Onto Streets

If a SSO discharges onto a street, the Wastewater Collections Supervisor, ERC

supervisor or SCOPE-10 manager will immediately implement one of the

following short-term remediation activities:

1. Clean the segments of the sanitary sewer pipeline draining to the SSO

discharge location, in order to stop the SSO discharge, utilizing hydraulic

cleaning techniques or mechanical cleaning techniques followed by CCTV

inspection of the cleaned segments of the sanitary sewer pipeline to identify

and further maintenance needs in these segments to prevent recurring SSO

discharges.

2. Re-route wastewater flow from a manhole upstream from the SSO discharge

to a manhole downstream of the SSO discharge utilizing a bypass pumping

system so as to conduct an inspection of the affected segments of the

sanitary sewer system pipeline by CCTV inspection to identify the cause of

the SSO discharge, and take the required action to repair the defect to

alleviate the SSO discharge and prevent future discharges at that location.

3. Repair or replace inoperative pumps and wastewater pumping stations that

fail and cause SSO discharges upstream from the wastewater pumping

station or at the wetwell.

After the SSO discharge has stopped the Wastewater Collections Supervisor will

implement clean-up activities which shall include removing any pooled sanitary

sewage using a wet-vacuum device, rinsing the street with potable water and

spraying the area with a solution containing a high concentration of chlorine.

d. Notification Procedures Following Discovery of a Dry Weather Sanitary Sewer

Overflow

1. Notification of Potentially Affected Private Property Owners

After the discovery of a SSO discharge, the Wastewater Collections

Supervisor or field personnel, will attempt to verbally contact residents or

building occupants on private property where the SSO discharge has or

could drain. This verbal notification, along with a description of the SSO, the

tentative plan action to stop the SSO discharge and the schedule to

7-5

accomplish this plan, the plan to clean the affected area afterwards and a

warning not to come in contact with the liquid discharging from the SSO. In

the event the Wastewater Collections Supervisor or field personnel cannot

make the verbal notification, the information shall be provided in a written

form, along with a name and telephone number to contact with any

questions, as soon as possible and post this written notification on the front

door of the residence or building occupying the affected property.

2. Notification of Public of Potential Health Risk

After the discovery of a dry weather SSO and if it is determined the dry

weather SSO can enter a water of the State (e.g. South Mouse Creek,

Fillauer Branch, Lick Branch, Bigsby Creek, Candies Creek, or Little Chatata

Creek), and will continue for more than 12 hours, the Vice-President of

Water and Wastewater will be notified. After consultation with the CEO, a

public service announcement will be provided to all local radio stations

identifying the location of the SSO discharge, a description of the SSO

discharge, a list of the waters of the state the SSO could enter, a warning

not to use these waters for recreation, livestock watering or irrigation until

further notice from Cleveland Utilities, and the tentative plan of action to

stop the SSO discharge and the schedule to accomplish this plan of action.

Signs shall also be posted at places where the public could gain access to the

affected waters of the State and leave these signs in place until samples

collected from the affected waters of the State reflect the following

characteristics:

• pH values between 6.0 and 9.0 units

• a concentration of the E. coli group not exceeding 126 colony

forming units per 100 ml, as a geometric mean based on five

samples collected at intervals of not less than 12 hours

7-6

Section 8

Wastewater Collection System Maintenance of Rights-of-Way and

Easement Program

A. Maintenance of Rights-of-way and Easement Procedures

1. Purpose

The purpose of maintaining rights-of-way and easements of the wastewater

collection system is to assure that Cleveland Utilities will have unimpeded access to

every part of the wastewater collection system for routine evaluations, preventative

maintenance, repairs and rehabilitation. Where sewer pipelines are installed across

unimproved land, Cleveland Utilities should obtain easements with provisions for

access and egress along the pipeline route sufficient to allow maintenance vehicle

traffic. Cleveland Utilities will then assure access to these easements is maintained

and kept clear of weeds, brush and trees.

2. Scope

This program relies on the findings of the field investigation programs, such as

smoke testing, manhole inspection and CCTV inspection, to locate those areas

where access to sewer pipeline routes has become limited. The SCOPE-10 manager

or Wastewater Collections Supervisor may determine that a right-of-way or

easement requires clearing and may notify maintenance personnel, a clearing

contractor or the property owner to do so.

During new construction, temporary and permanent easements should be carefully

considered for adequate width, paying attention to the possibility of development

and potential additions to buildings, particularly commercial and government

buildings.

3. Resources Needed

The observations of field personnel are important for identifying areas that are in

need of clearing. During manhole inspection or CCTV inspection field crews should

note any areas where trees or brush are obstructing clear access to all segments of

the wastewater collection system. These are noted and entered into a database for

scheduled clearing.

8-1

4. Performance Measures

A reasonable indicator of performance is to have completed the maintenance of at

least 50 percent of the rights-of-way and easements reported as needed clearing

annually.

5. Reporting and Recordkeeping

This program utilizes the findings of field investigations to identify areas in need of

clearing and accumulates this data in a database. The database will generate work

orders for clearing.

B. Street Paving Monitoring Program

1. Purpose

The purpose of monitoring street paving activities is to assist in the planning of

maintenance work on manholes and sewer system rehabilitation. When paving is

being performed over gravity sewer pipelines, the elevations of manhole rings may

need to be adjusted by the addition of riser rings so the manhole covers remain on-

grade and do not create traffic issues.

2. Scope

This program uses an annual scheduling of paving by the City of Cleveland and the

Bradley County Road Department each year. Prior to beginning any resurfacing in

the Cleveland Utilities wastewater service area, the City of Cleveland and the

Bradley County Road Department shall be contacted to confirm the type of work

being performed.

3. Resources Needed

The City of Cleveland and the Bradley County Road Department’s annual schedule

for resurfacing along with periodic updates concerning scheduling. These updates

are communicated to the Wastewater Collections Supervisor for adjustments to

manholes.

4. Performance Measures

The measure of performance for this program should be that Cleveland Utilities is

informed of paving work planned by the City of Cleveland and the Bradley County

Road Department. A reasonable goal is to have field crews scheduled to adjust

manhole elevations as necessary to meet new pavement elevations.

8-2

5. Reporting and Recordkeeping

The City of Cleveland and the Bradley County Road Department typically provide an

annual paving list of streets scheduled for paving. After any necessary adjustments

are completed the Wastewater Collections Supervisor shall be notified that work has

been completed.

8-3

Section 9

Wastewater Collection System Components Inventory Management

Procedures

A. “As-Built” Plans Maintenance

“As-Built” plans are developed for all extension and improvements in the wastewater

collection system. Printed copies of these plans are filed in the project files in the

Engineering Department and are indexed by name and project number. Plans are

scanned into a digital format and are archived in the Cleveland Utilities computer

system.

B. Equipment and Supplies

1. Spare Parts Inventory

Spare parts and supply inventories are purchased and maintained by the Storeroom

Manager.

2. Equipment and Tools Inventory

Equipment and tools inventories are purchased and maintained by the Wastewater

Collections Supervisor.

3. Vehicle Repair Program

All vehicles used by the Wastewater Division during the operation and maintenance

of the wastewater collection system are maintained and repaired by the Cleveland

Utilities Vehicle Garage.

9-1

Section 10

Identification, Prioritization and Implementation Procedures for

Wastewater Collection System Rehabilitation Actions

A. Collection System Assessment Priority Parameters

1. Purpose

The SCOPE-10 program has been created to oversee the flow monitoring, manhole

inspection, smoke testing, flow isolation studies and CCTV inspection and to use

this data to make recommendations pertinent to manhole, sewer lateral and sewer

main rehabilitation. This program will also oversee the rehabilitation, including

inspection and incorporation of the rehabilitation into the GIS mapping database.

The SCOPE-10 program will also manage the CMOM document and ensure that the

tasks described heretofore are performed and that recordkeeping is properly

performed.

The purpose of this program is to establish priorities, by drainage basin, for

assessing the condition and capacity of the wastewater collection system. The goal

is to efficiently restore the system to optimum capacity and reduce the number of

sanitary sewer overflows through rehabilitation of the collection system and

provide information for planning purposes.

2. Scope

This program uses the findings of service orders, flow monitoring studies, flow-

isolation studies, CCTV inspection and the SCOPE-10 program to develop a listing of

priorities for further investigation or rehabilitation.

3. Resources Needed

An engineer is needed to evaluate the data obtained through service orders, flow

monitoring studies, flow-isolation studies, CCTV inspection and the SCOPE-10

program. A GIS database and mapping system is critical to tracking information and

identifying connectivity of the wastewater collection system.

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4. Method

The SCOPE-10 manager will review the following information:

a. Service Orders: The reports generated from will indicate drainage basins

with back-ups and sewer system overflow problems.

b. Flow Monitoring Reports: Reports covering at least a 60-day period should

include several rainy periods and should indicate drainage basins with high

wet weather flow to dry-weather flow ratios.

c. Flow Isolation Studies: These studies will indicate drainage basins with high

flow during night-time hours when only minimal flows should be seen. This

is indicative of infiltration.

d. SSO Reports: These reports will indicate drainage basins with problematic

levels of I/I and should include an estimate of SSO volumes for each

location.

e. Preliminary Sewer Assessments: Any field observations made by work

crews or operators that may indicate problem areas within the collection

system.

f. Public Health and Environmental Issues: Concerns created by sewer

defects, insufficient capacity or a need for wastewater collection system

expansion that are raised by TDEC, including receiving water use

designations.

The SCOPE-10 manager will prioritize the drainage basins based upon the

information obtained from the above programs to develop a schedule for

maintenance and rehabilitation of the wastewater collection system


The results of the review are compiled in a report that prioritizes the order of

drainage basins. This report is utilized to establish a capital improvement plan that

must be balanced with the financial capabilities of Cleveland Utilities. However, any

defects requiring immediate attention in other areas will be corrected on an

ongoing basis.

B. Gravity Pipeline Rehabilitation Program

1. Purpose

The purpose of this program is to prioritize the rehabilitation of gravity sewer

pipelines responsible for I/I to create capacity and reduce overflows. The program

addresses the techniques to be employed for rehabilitation and the means of

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determining the effectiveness of the completed rehabilitation projects. The

program maintains an inventory of completed projects advises the SCOPE-10

manager of future rehabilitation projects for capital improvements planning.

2. Scope

This program uses the results from smoke testing, CCTV inspections, manhole

inspections, flow isolation studies, dyed-water testing and service lateral

investigations to prioritize rehabilitation projects in drainage basins. The program is

effective from planning to completion.

3. Resources Needed

The SCOPE-10 manager will evaluate all testing results and determine which

pipelines are most in need of rehabilitation. Defects noted during CCTV inspection

will be ranked by PACP coding, and any defects noted during other inspections will

be noted, along with the severity, on the GIS mapping system.

The GIS mapping of the wastewater collection system is necessary to map defects

along each pipe section and locating pertinent features such as roadways, streams

and structures.

4. Method

Preparation: The SCOPE-10 manager assembles all pertinent reports relating to

investigations within the designated drainage basin as well as a wastewater

collection system map of the drainage basin.

Procedure:

a. The gravity sewer pipelines within the basin will be scored based upon PACP

scoring. Additional consideration will be given to defects identified by other

means of testing. The impact of pipeline failure and cost of rehabilitation

will be taken into consideration.

b. Gravity sewer pipeline segments shown to have existing problems (SSO’s,

excessive I/I, back-ups, etc.) are evaluated by the number of defects and the

scoring of those defects. The condition of the defect, whether or not it as

risk of imminent failure and how much I/I are being contributed are all

taken into consideration when identifying pipeline segments for repair or

rehabilitation.

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c. The method of rehabilitation is selected, considering the predicted mode of

failure and the size, condition, depth, location and material of the sewer

pipe. Some of the methods employed for rehabilitation are listed below:

• Cured-in-place-pipe

• Dig and replace

• Pipe Bursting

• Sliplining

• Point repairs

d. The rehabilitation project is completed and the effectiveness of the

improvements is confirmed by flow monitoring.

e. The results of the rehabilitation projects are monitored and tracked for

effectiveness.

f. All information is maintained through the GIS mapping database and the

SCOPE-10 program.


A report for each gravity sewer pipeline rehabilitation project should include the

sewer pipeline configuration, determination of need for rehabilitation, estimate of

I/I rates, method of rehabilitation and an estimate of I/I reduction. A listing of all

gravity sewer pipeline rehabilitation projects should include the effectiveness of the

methods used and any details of the project that influenced the effectiveness of the

methods used.


A performance indicator for gravity sewer pipeline rehabilitation program is the

percent rehabilitation completed. This indicator is the footage of pipe rehabilitated

divided by the footage identified as needing rehabilitation.

A reasonable number is to rehabilitate at least 50 percent of the pipe identified as

needing rehabilitation annually.

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Section 11

Standards for Construction of New Additions to and Repair and

Rehabilitation of the Wastewater Collection System

The standards utilized by the Cleveland Utilities Water and Wastewater Division for the

construction of new additions to and repair and rehabilitation of the wastewater collection

system are available at the Cleveland Utilities web site (www.clevelandutilities.com) by

entering the water/wastewater section and downloading specifications.

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Section 12

Quality Assurance Program for New Additions to the Wastewater

Collection System

Quality assurance during the construction of new additions to the Cleveland Utilities

wastewater collection system is provided by Cleveland Utilities personnel assigned to the

Engineering or Wastewater Rehabilitation Department or by resident construction observers

provided by consulting engineering firms responsible for administering construction of new

additions to the wastewater collection system.

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Section 13

Procedures to Update and Modify MOM Program Elements

The SCOPE-10 manager will request the Vice-President of Water and Wastewater, Wastewater

Collections Supervisor and the Facilities Maintenance Supervisor review the MOM document

annually and provide any changes in MOM Program elements that need to be considered. The

SCOPE-10 manager will determine which changes should be incorporated into the MOM

document and publish these changes as revisions to the MOM Program document.

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Appendix A

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