9-02764 Clean and Televise.pdf

PIPE LINING 02764-1 CLEAN AND TELEVISE

SECTION 02764

CLEAN AND TELEVISE

PART 1 - GENERAL

1.1 DESCRIPTION OF WORK

A. The sanitary sewer mains shall be televised and cleaned, as directed. CCTV inspections shall be done twice on the mains (once after cleaning and once after grouting). Work shall be completed in accordance with Part 3 – Execution.

B. Contractor shall prepare and hand-deliver written notices of construction 24 hours prior to any work being performed and also will issue notices to effected properties a minimum of one (1) week prior to the start of work.

C. All work shall be coordinated with Borough personnel and shall be completed during normal working hours. Normal working hours shall be defined as 7:00 am to 5:00 pm, Monday through Friday (excluding generally accepted holidays).

D. Estimated pipe run lengths, pipe material are included in Section J. Contractor shall be responsible for verifying all information in the field.

E. Figures in the Section J is offered for Contractor information. It is not guaranteed to be an accurate record of the existing conditions. Contractor shall hold the Borough harmless for any inaccuracies.

F. CCTV of manholes shall include the channel, bench, pipe opening in, pipe opening out, photograph of the pipe in and a photograph of the pipe out. Cleaning of manholes is not included in this Contract.

1.2 RELATED REQUIREMENTS

A. Section 01010 – Contractor’s Work.

B. Section 01025 – Measurement and Payment C. Section 02766 – Testing and Joint Grouting

1.3 SUBMITTALS

A. Television inspection videos and reports.

B. Resident Notification Letters.

CLEAN AND TELEVISE 02764-2 PIPE LINING

1.4 QUALITY ASSURANCE

A. Company shall have been providing these types of similar service for a minimum of five (5) years.

PART 2 – PRODUCTS

2.1 Not Applicable.

PART 3 – EXECUTION

3.1 CLEANING OF SEWERS AND TELEVISION INSPECTION

A. GENERAL DESCRIPTION OF WORK

Generally, the work to be performed includes, but is not limited to, the following principal features:

1. Furnish equipment and labor to clean sanitary sewer lines and appurtenances with approved cleaning equipment.

2. Furnish equipment and labor to control the flow in the sewer lines and appurtenances during the work.

3. Furnish equipment and labor to visually inspect the various size sewer lines and appurtenances by closed-circuit television (CCTV).

4. Furnish the Owner with a thorough and complete Inspection Log of each sewer line televised, including length of line, depth of upstream and downstream manholes, direction of flow, location and orientation of all service connections, and location and description of sags, leaks, or other deficiencies observed in line.

5. If necessary, furnish equipment, labor and materials to bypass pump in selected areas during TV inspection where required.

6. Furnish to Owner two USB flash drives (with high definition format) of each line that is TV inspected, including video of inspection and electronic copy of inspection log, as described in Subparagraph 4 above.

7. All work shall be in accordance with OSHA Safety and Health Standards (29 CFR 1910) latest revision.

PIPE LINING 02764-3 CLEAN AND TELEVISE

B. CERTIFICATIONS OF EXPERIENCE

1. As the effectiveness of work as herein specified depends to a large extent upon the experience of the Contractor, the Contractor shall be required to submit a certified experience record meeting the following requirements:

a. At least five (5) years company experience of similar type in or near the geographic area of this project.

C. CONDUCT OF WORK

1. The work under this part shall be completed with a minimum of inconvenience to the residents and traveling public.

2. For work within a residential area, the Contractor must ensure that all residents are able to conveniently and safely access their property at all times and use their public sewer system.

3. For work within a commercial area, the Contractor must ensure that all customers and employees are able to conveniently and safely access their property at all times.

D. PROTECTION OF ADJACENT AREAS

1. The Contractor's attention is directed to the fact that he is responsible for all damages to adjacent structures, signs, fences, trees, shrubs, lawns, utilities, storm drains, etc. Any sidewalks, curbs, paving, and driveways damaged shall be replaced by the Contractor at no cost to the Borough.

2. The Contractor shall provide sufficient watchmen and competent directors of traffic and shall take all necessary precautions for the proper protection of the work and the safety of the public.

3. The Contractor's attention is directed to the fact that a portion of the work may be within the Township right-of-way and traffic control must be set up and performed in accordance with the Borough requirements, regardless of the time the work is performed.

E. CONSTRUCTION LIMITS

Contractor shall confine his operations strictly within the area of the sewer main, CLEAN AND TELEVISE 02764-4 PIPE LINING as directed by the Borough Engineer, unless written permission is obtained to occupy additional ground. Upon completion of work, the Contractor shall clean-up and restore the area of his operations to a condition at least equal to original conditions. Damage to property shall be the responsibility of the Contractor and restoration of same shall be made at the Contractor's expense.

F. CLEANING

1. Cleaning of sewers shall begin at the high point of the sanitary sewer system and work toward the low point.

2. Cleaning of sanitary sewer sections shall be performed using mechanically powered, hydraulically propelled or high velocity sewer cleaning equipment.

Selection of the equipment shall be based on the conditions of the lines at the time the work commences. The equipment and methods selected shall be satisfactory to the Borough Engineer.

3. Satisfactory precautions shall be taken to protect the sewer lines from damage that might be inflicted by the improper use of cleaning equipment. Whenever hydraulically propelled cleaning tools, which would depend upon water pressure to provide their cleaning force, or any tools which retard the flow of water shall not cause any damage or flooding to public or private property being served by the sewer section involved.

4. All sludge, dirt, sand, rocks, grease, grit, roots and other solid or semi-solid material resulting from the cleaning operation shall be removed at the downstream appurtenance of the section being cleaned. Passing material from manhole to manhole section could cause line stoppage and shall not be permitted. When hydraulic cleaning equipment is used, a suitable weir or dam shall be constructed in the downstream appurtenance in such a manner that the solids are trapped. This trapped solution shall then be pumped or bucketed from the appurtenance into a suitable means of transporting it to a pre-determined spot for disposal. When bucket machines are being used, a suitable container shall be provided to receive the materials dumped from the bucket. UNDER NO CIRCUMSTANCES SHALL SEWAGE OR SOLIDS

REMOVED THEREFROM BE DUMPED ONTO STREETS OR INTO

DITCHES, CATCH BASINS OR STORM DRAINS. All solids or semi-solids, resulting from the cleaning operations shall be removed from the site and disposed of at a state approved dumping site. Costs for this removal shall be included in the unit prices bid for the cleaning work.

5. Hydraulic Cleaning Equipment: The equipment used shall be of a moveable dam type and be constructed in such a way that a portion of the dam may be collapsed at any time during the cleaning operation to protect against flooding

PIPE LINING 02764-5 CLEAN AND TELEVISE

of the sewer. Sewer Cleaning balls or other such equipment which cannot be collapsed instantly will not be considered as acceptable cleaning equipment.

The moveable dam shall be of equal diameter as the pipe being cleaned and shall provide a flexible scraper around the outer periphery to insure total removal of grease. If a sewer section is found to be completely stopped up or plugged or heavily intruded with roots, then the Contractor shall immediately notify the Borough Engineer. Cleaning shall include the use of cutting equipment to remove any roots that are encountered.

6. High Velocity Hydro-Cleaning Equipment: All high velocity sewer cleaning equipment shall be truck mounted for ease of operation. The equipment shall have a minimum of 500 feet of 1-1/2 inch I.D. high pressure hose with a selection of two or more high velocity nozzles. The nozzles shall have a capacity of 60 GPM at a working pressure of 800 to 2000 pounds psi. The nozzles shall be capable of producing a scouring action from 15 to 35 degrees in all size lines designated to be cleaned. Equipment shall also include a high velocity gun for washing and scouring manhole walls and floor. The gun capacity shall be equal to 3 to 27 GPM at between 200 to 800 psi. The gun shall be capable of producing flows from a fine spray to a long distance solid stream.

7. Mechanical Cleaning Equipment: Bucket machines shall be in pairs with each machine powered with a minimum of 9 H.P. engine to ensure sufficient pulling power. A suitable means of transporting solids to an approved spot shall be used with mechanical cleaning equipment to transport the material removed from the sewer lines to designated locations.

G. FLOW CONTROL

1. Contractor shall be responsible for the protection of Homeowner’s property against any damage resulting from cleaning and televising operations.

2. Where internal inspection via closed circuit television equipment is required, the flow through the sewer shall be controlled as noted below. Contractor shall provide maintenance of flow in the affected portions of the sewer system during cleaning, televising, testing and grouting.

3. When the depth of flow through the subject sewer is less than one eighth of the pipe diameter, the flow may continue through the sewer during the inspection, unless the Borough Engineer determines that the complete periphery of the pipe must be inspected to effectively conduct the inspection and sealing operations in a particular section.

4. Where the depth of flow exceeds one-eighth of the pipe diameter, or where

CLEAN AND TELEVISE 02764-6 PIPE LINING

directed by the Borough Engineer, a sewer line plug shall be inserted into the line at a manhole upstream from the section to be inspected, tested and/or sealed. The plug shall be so designed that all or any portion of the sewage flows can be released. During the inspection portion of the operation, flows shall be shut off or substantially reduced in order to properly inspect the pipes at the invert. No direct payment will be made for plugging or blocking work and the Contractor shall make allowances for same in the unit prices bid for cleaning. When adequate control cannot be obtained by plugging or blocking, or flooding of buildings might occur, the Contractor shall immediately notify the Borough Engineer. If determined necessary by the Engineer, the Contractor may be required to set-up bypass pumps and install plugs, etc. and then continue with his operations.

5. Use of bypass pumps shall be used for sewage flow control when sewer line section being worked on is above 25% of the pipe diameter and as directed by the Engineer. Flow control shall be accomplished by bypass pumping of flow from upstream of the sewer segment to be televised to a point downstream of the sewer segment to be televised.

6. Prior to any bypassing or line plugging, the Contractor shall become fully aware of existing sewer flow conditions.

7. See Section K for additional Bypass Pumping Requirements

H. CLOSED-CIRCUIT TELEVISION INSPECTION

1. The Contractor shall furnish all equipment and labor as required, including all electronic equipment and technicians, to televise sewer mains. The Contractor shall provide monitoring of closed-circuit televised sewers in a manner which shall provide clear and visible pictures of the work being performed when requested by the Engineer.

2. The television inspection shall be performed on each section of sewer main awarded under the contract. Where required, each sewer main being inspected shall be isolated from the remainder of the line by the use of bypass pumping and/or line plugs to ensure total viewing of the inside periphery of the pipe.

The inspection shall be performed by pulling the television camera through the line along the axis of the pipe. The inspection shall be performed in a forward direction, and inspection record shall be kept which will show clearly the exact location and conditions of the pipe, in relation to the centerline of the downstream sanitary sewer manhole.

3. Television equipment shall consist of a self-contained camera and a monitoring unit connected by a three or more wire coaxial cable. The

PIPE LINING 02764-7 CLEAN AND TELEVISE

equipment shall be mounted in a truck van for ease of operation. The camera shall be small enough to insure passage through 8-inch sanitary sewer mains including areas partial blockages or obstructions, and shall be waterproof and shall have a self continuous 600-1ine resolution picture showing the entire inside periphery of the pipe. The camera shall be capable of rotating three hundred and sixty (360) degrees to view service connections and pipe joints.

I. RECORDS

1. Records shall be kept of all televising and cleaning performed. These records shall be on printed form showing the date, lateral locations, line size, length of the section, type of cleaning performed, amount of debris removed and any special remarks concerning the condition of the sanitary sewer. A television and work log report, in printed form shall be maintained during the television inspection. This log shall show the exact location of leaks, tie-ins, broken pipes, roots, irregularities of pipe alignment or grade, existing spot repairs, existing cement lining, and other pertinent information. Defects shall be coded in accordance with NASSCO Pipeline Assessment & Certification Program (PACP). A still frame capture from the video inspection shall be made from the television monitor of broken main pipe, irregularities of pipe alignment, leaks, obstruction areas, spot repairs, service taps/laterals, and all other problem areas, for future reference. A report and video shall be required for all mains after cleaning. A second report and video shall be required for all mains after grouting.

2. All videos shall be of high quality format, capable of viewing in play, fast forward, rewind, and still modes. Contractor shall provide the following audio and display information on all videoss:

a. Audio Information

1) Day, month, year and time.

2) Location of laterals by station and street address.

3) Manhole Number

3) Direction camera is viewing and lateral at destination point.

4) Audio shall be used to describe the location and condition of all laterals, leaking joints, breaks, and other problem areas.

b. Screen Display Information

1) Typical display on all videos shall be:

2) DATE (Month, Date, Year)

3) Job Number

4) Lateral Locations by station and street address

5) Linear Feet

CLEAN AND TELEVISE 02764-8 PIPE LINING

This shall be located on the screen where it will not obstruct the view.

Color TV camera shall be used for all televising. No payment shall be made for downtime.

END OF SECTION