A1_-_SOW_-Cleaning_and_CCTV_of_the_Peaks_of_Otter_Sewer_-_May2025.pdf

2025 Cleaning and CCTV Recording – Peak of Otter Sewer – BLRI May 12, 2025

Scope of Work 2025 Cyclic Cleaning and CCTV Recording of the Peaks of Otter Sewer Main and Laterals

BLRI

• This scope of work will provide funding for cyclic cleaning and CCTV inspection of the Peaks of Otter sewer mainlines, manholes, and sewer service laterals. The project will include the cleaning of duct iron, PVC, and Vitrified Clay sewer lines, as well as the manholes and cleanouts associated with the entire sewer system. The Peaks of Otter sewer system was installed over 30 years ago and needs to be inspected on a regular basis as there are beginning to be major leaks and ground water intrusion into the system. After these inspections are completed the Blue Ridge Parkway (BLRI) will be able to establish a regular cyclic cleaning and maintenance program to restore the sewer system to a functional condition and to mitigate ongoing deterioration.

• The Peaks of Otter area is located between Mile Post (MP) 85.0 and MP 86.0 in Virginia section of the BLRI.

• The work will include the cleaning and removal of sediment buildup from the mainline, laterals, service connections and cleanouts for the entire sewer system.

• It is anticipated that NO repair work will be completed under this project. Any repairs due to this cleaning project will be reviewed and handled under a different project. Any repairs caused by the negligence of the cleaning contractor will be completed by the contractor at no cost to the government. See Cleaning Specifications – Section 02761 for approved cleaning process details.

• In addition to the cleaning of the sewer system, the entire sewer system will be inspected by an approved CCTV system. See CCTV Specifications – Sections 02762 thru 02764 for approved process details.

• As a general note: The cleaning and the inspection of the sewer main is to identify any breakage in the piping, infiltration of tree roots that could potentially cause a plugged line, and mainly the infiltration of groundwater into the system that produces larger than normal quantities of “sewer” water to be delivered to the Bedford City Wastewater Treatment facility.

• The removal of vegetation root systems causing premature failure of the sewer pipe will be removed during the cleaning process. Contractor shall provide treatment to the root systems.

The materials used to complete this task, as discussed in the attached Cleaning Specifications

– Section 02761, will be submitted for review and approval.

• A list of each line to be cleaned and inspected will be provided with this scope. See Attachment Sewer Pipe Information.

• Each site is to be left cleared and sanitized of sewer debris. Any damaged landscape will be restored by the contractor at no cost to the government.

• All materials and equipment will be supplied by the Contractor. Materials and methods used should meet all Federal and State laws.

• No heavy equipment is allowed off road unless it is approved by the park point-of-contact prior to use.

• Protection of the Public: The Contractor shall always conduct his/her work as to assure the safety and convenience of the visiting public and to assure the protection of persons and property. Care shall always be taken to regulate the operations to protect visitors on the Parkway. The Contractor shall provide, erect, and maintain all necessary barricades. Take the necessary precautions for protection and safety of the public and park property.

• Contractor shall provide a safety plan for this project as per contracting requirements.

• All work will be done under a single contract.

There are ten different line segments to this project. An electronic drawing set of the system will be provided to contractors interested in bidding on the project. There are 138 separate pipe runs/segments (from manhole (MH) to MH), four (4) different pipe sizes and three (3) different pipe materials, 128 MH, and 11 termination points (TP) to be cleaned. NOTE: CO are counted as MH.

SEGMENT LOCATIONS ON THE ELECTRONIC MAP

1. Segments “A” extends from Sheets 21, 22, 23, 24, 26, 27, 30, 31, 32 of 37 – A1 to A36.

2. Segments “B” extends from Sheets 30 to 31 of 37 – B1 to B7.

3. Segments “C” extends from Sheets 24, 25, 26, 29 to 30 of 37 – C1 to C17.

4. Segments “D” is on Sheet 29 of 37 – D1 to D4.

5. Segments “E” is on Sheet 23 of 37 – E1 to E3.

6. Segments “F” extends from Sheets 18, 19, 20, 21 of 37 – F1 to F15.

7. Segments “G” extends from Sheets 22, 24 of 37 – G1 to G7.

8. Segments “H” is on Sheet 24 of 37 – H1 to H2.

9. Segments “J” is on Sheet 25 of 37 – J1 to J2.

10. Segments “County #s” extends from Sheets 32, 33, 34, 35, 36, 37 of 37 – 113A to

88A to Flow meter.

MHs, TPs, LENGTHS, TYPES, AND PIPE SIZES PER SEGMENT

1. Segments “A” has 39 MH, 2 TP, and 45 feet of 4-inch PVC, 1,657 feet of 6-inch PVC, 2,267 feet of 8-inch, and 4,161 feet of 10-inch DIP pipe.

2. Segments 2 - “B” has 8 MH, 0 TP, and 321 feet of pipe 6-inch PVC, 752 feet 8-inch DIP pipe.

3. Segments “C” has 17 MH, 0 TP, and 3,289 feet of 10-inch DIP pipe.

4. Segments - “D” has 7 MH, 3 TP, and 41 feet of 4-inch PVC, 65 feet of 4-inch DIP, 166 feet of 8-inch 1,349 feet of 10-inch DIP pipe.

5. Segments - “E” has 3 MH, 3 TP, and 78 feet of 6-inch PVC and 379 feet of 6-inch DIP pipe.

6. Segments - “F” has 15 MH, 2 TP, and 100 feet of 4-inch PVC, 2,285 feet of 8-inch, and 293 feet of 10-inch DIP pipe.

7. Segments - “G” has 7 MH, 1 TP, and 171 feet of 6-inch VCP, 509 feet of 6-inch PVC and 239 feet of 8-inch DIP pipe.

8. Segments - “H” has 2 MH, 0 TP, and 219 feet of 6-inch PVC pipe.

9. Segments - “J” has 3 MH, 0 TP, and 234 feet of 10-inch DIP pipe.

10. Segments - “County #s” has 27 MH, 0 TP, and 5,740 feet of 10-inch DIP pipe.

The complete list of pipe segments, line sizes, line types and lengths can be found on the spread sheet in the attachments.

Attachments include:

1. Submittal form – “CM-16 Transmittal Form”

2. Specification “Section 02761 Cleaning Sanitary Sewer Systems”

3. Specification “Section 02762 Televising Sanitary Sewer Systems”

4. Specification “Section 02763 Television Sanitary Sewer Systems”

5. Specification “Section 02764 Televising Existing Manholes”

6. Drawing “NPS – BLRI - Peaks of Otter - WW Utility Sys”

7. MH & Lines Peaks of Otter Sewer

Attachments

CM‐16 TRANSMITTAL FORM ‐ NATIONAL PARK SERVICE

Date:

Specification Section No.

Item No.

Description of Item No. Copies

Submitted Approved Approved w/ Notations

Title

Disapproved - Resubmit(Size, Type, Name, Manufacturer, Use, Etc.)

Project: Contract No.:

Contractor: Subcontractor/Supplier:

NPS ACTION

Contractor Signature Recommended by

I hereby certify that this submittal has been reviewed for accuracy, completeness, and compliance with contract requirements (FAR 52.236-21)

Approval of this submittal is subject to the provisions of the contract drawings and specifications. This action is for general concurrence only and the Government is not responsible for errors or omission.

Title, Date COR Signature Date

CM‐16 TRANSMITTAL FORM ‐ NATIONAL PARK SERVICE

Item No. Comment Review Comments (or attached):

02761 - 1 of 6 OCU Master CIP Technical Specifications rev: January, 2024

SECTION 02761

CLEANING SANITARY SEWER SYSTEMS

PART 1 - GENERAL

1.01 SCOPE OF WORK

A. The Work covered in this section consists of cleaning sewer lines and manholes prior to the internal television inspection(s) for new or existing wastewater systems of the Peaks of Otter (Peaks) Sewer Main for the National Park Service (NPS).

B. Gravity Main and Sewer Lateral Cleaning: The intent of gravity main cleaning is to remove debris that may be causing a reduction in flow capacity, potential sewer backups, or that limits the ability to evaluate the structural condition of the pipe segment. On all sewers, the Contractor shall perform sewer-cleaning work to an acceptable level as necessary to perform a thorough television inspection of the sewer. An acceptable level is defined as the removal of all debris throughout the pipe segment cleaned. If the pipe condition is such that cleaning may cause a potential collapse, then the pipe shall be televised without attempting to clean it pending approval by the Contracting Officer Representative or NPS Inspector.

C. Recovering of Equipment: The Contractor will be responsible for recovering any equipment that becomes lodged or lost in the pipeline. The Contractor will be responsible for all costs associated with required evacuation, restoration of roads and easements, and repairs to pipes and manholes as needed to restore the pipeline and appurtenances back to their original conditions.

1.02 CLEANING EQUIPMENT

A. Hydraulically Propelled Equipment: The equipment used shall be of a movable 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 of the sewer. The movable dam shall be equal in diameter to the pipe being cleaned and shall provide a flexible scraper around the outer periphery for grease removal. Special precautions to prevent flooding of the sewers and public or private property shall be taken at all times.

B. High-Velocity Jet (Hydro-Cleaning) Equipment: All high-velocity sanitary sewer cleaning equipment shall be constructed for ease and safety of operation. The equipment shall have a selection of 2 or more high-velocity nozzles. The nozzles shall be capable of producing a scouring action from 15° to 45° (degrees) in all size mains. Equipment shall also include a high-velocity gun for washing and scouring manhole walls and floor. The gun shall be capable of producing flows from a fine spray to a solid stream. The equipment shall carry its own water tanks, auxiliary engines, pumps, and hydraulically driven hose reel.

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C. Mechanically Powered Equipment: Bucket machines shall be in pairs with sufficient power to perform the Work in an efficient manner. Machines shall be belt operated or have an overload device. Machines with direct drive that could cause damage to the pipe will not be used. A power rodding machine shall be either a sectional or continuous rod type capable of holding a minimum of 750-feet of rod. The rod shall be heat-treated steel. To ensure safe operation, the machine shall be fully enclosed and have an automatic safety clutch or relief valve.

D. Vacuum machines may be used for removal of materials from manholes when other cleaning equipment is used to dislodge and transport material to the access point.

E. Combination Cleaner: For cleaning small and large diameter sewer, the Contractor may use a combination hydraulic high-volume water and solids separation system. Water volume of up to 250-gpm at or above 2,000-psi will move solids to the downstream manhole in high flow conditions. The separation system will dewater solids to 95 % (passing a paint filter test) and transfer them to a dump truck, if needed, for transport to a water reclamation facility, approved landfill, or other location specified by the NPS or designee. Wash water will be filtered to a point where it can be used in the pump for continuous cleaning. No bypassing of sewer flows will be necessary. The unit shall be capable of 24-hour operation and the unit shall not leave the manhole until a section is fully cleaned.

1.03 SHOP DRAWINGS AND SUBMITTALS

A. Submittals shall be submitted to the NPS for review and acceptance prior to construction in accordance with the General Conditions and specifications on the “CM-16 Transmittal Form”.

B. A daily log shall be maintained to record the location of the manholes and sewer lines, lengths of the lines cleaned, method of cleaning, line sizes, identify type of cleaning (light, medium, or heavy), and type of debris moved. Observations are to be recorded on a cleaning report form.

PART 2 - PRODUCTS (NOT USED)

PART 3 - EXECUTION

3.01 GENERAL

A. A list of all materials to be supplied shall be submitted for approval on the General Conditions and specifications on the “CM-16 Transmittal Form”.

B. The equipment shall remove dirt, grease, rocks, sand, other materials, and obstructions from the sewer mains, laterals, and manholes.

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C. A high-velocity sewer cleaner will be used for the majority of the cleaning work. Other equipment, such as bucket machines, rod machines, hydraulic root cutters, vacuum trucks and balling equipment shall be available.

3.02 CLEANING PRECAUTIONS

A. All necessary precautions shall be taken to protect the sewer from damage during all cleaning and preparation operations. Precautions shall also be taken to ensure that no damage is caused to public or private property adjacent to or served by the sewer or its branches. The Contractor shall pay for and restore, at no additional costs to the NPS, any damage caused to public or private property because of such cleaning and preparation operations.

B. Satisfactory precautions shall be taken in the use of cleaning equipment. When hydraulically propelled cleaning tools (which depend upon water pressure to provide their cleaning force) or tools which retard the flow in the sewer line are used, precautions shall be taken to ensure that the water pressure created does not damage or cause flooding of public or private property being served by the sewer. No fire hydrant shall be obstructed in case of a fire in the area served by the hydrant. All requirements shall be met when accessing a fire hydrant including but not limited to meters, backflow preventers, and properly trained personnel. It shall be the Contractor's responsibility to meet all state and local requirements.

3.03 CLEANING

A. If cleaning of an entire sewer section cannot be successfully performed from one manhole, the equipment shall be set up on the other manhole and cleaning attempted again. If results of the cleaning are favorable, the Contractor will proceed with the TV inspection. All sludge, dirt, sand, rocks, and other solid or semisolid materials resulting from the cleaning operation shall be removed from the downstream manhole of the section being cleaned.

The Contractor shall not be responsible for removing mortar or other material that is securely attached to the pipe walls or joints.

B. Materials shall be disposed of from the site at least once at the end of each workday. The Contractor will be responsible for the disposal of materials removed from the sewer system.

All sewer-cleaning efforts shall require documentation of all quantities and types of materials removed during cleaning.

C. The designated sewer manhole sections shall be cleaned using hydraulically propelled, high-velocity jet, or mechanically powered equipment approved by the NPS. Cleaning shall consist of normal hydraulic jet cleaning to facilitate the internal CCTV inspection.

1. Types of cleaning of sanitary sewers:

a. Light cleaning of sewers consists of a maximum of 1 pass of the jet nozzle. Light cleaning of laterals will consist of flushing water into a cleanout.

b. Medium cleaning of sewers consists of 2 to 4 passes of the jet nozzle. Medium cleaning of laterals will consist of 1 to 4 passes with a jet nozzle.

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c. Heavy cleaning consists of 5 or more passes of the jet nozzle such as removing heavy grease, debris, and roots.

d. Descaling of Ductile Iron pipe: Multiple passes with mechanical equipment to remove scale build up to restore pipe to original inside diameter.

2. Selection of the equipment used shall be based on the conditions of lines at the time the Work commences. The equipment and methods selected shall be satisfactory to the NPS. The equipment shall be capable of removing dirt, grease, rocks, sand, debris, other materials, and obstructions from the sewer lines, laterals, and manholes.

3. If cleaning of an entire section cannot be successfully performed from one manhole, the equipment shall be set up on the other manhole and cleaning again attempted. The intent of preparatory cleaning is to provide sufficient cleaning to ensure camera passage and the internal conditions of the pipeline can be fully assessed.

4. If the NPS establishes that a particular section of the pipeline cannot be adequately cleaned due to broken, collapsed, or void areas, then the inspection will be attempted up to the obstruction.

3.04 ROOT REMOVAL

A. Roots shall be removed in the designated sections and manholes where root intrusion is a problem and where authorized by the NPS. Special attention should be used during the cleaning operation to remove roots from the joints. Any roots that could prevent the proper application of chemical sealants or could prevent the proper seating and application of cured-in-place liners shall be removed. Procedures may include the use of mechanical equipment such as, rodding machines, bucket machines, winches using root cutters, porcupines, and equipment such as high-velocity jet cleaners. Chemical root treatment shall be used before or following the root removal operation, depending on the manufacturer’s recommendation. The Contractor shall capture and remove all roots from the line.

3.05 CHEMICAL ROOT TREATMENT

A. To aid in the removal of roots, manhole sections that have root intrusion shall be treated with an acceptable herbicide. The application of the herbicide to the roots shall be done in accordance with the manufacturer’s recommendations and specifications in such a manner to preclude damage to surrounding vegetation. Any damaged vegetation, so designated by the NPS, shall be replaced by the Contractor at no additional cost to the NPS. All safety precautions as recommended by the manufacturer shall be adhered to for handling and application of the herbicide. A list of all materials (herbicide) to be supplied shall be submitted for approval on the "CM-16 Transmittal Form”.

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3.06 MATERIAL REMOVAL AND DISPOSAL

A. All sludge, dirt, sand, rocks, grease, roots, and other solid or semisolid material resulting from the cleaning operation shall be removed at the downstream manhole of the section being cleaned. Contractor shall provide appropriate screening to stop passing of materials into downstream sewers. All solid or semisolid materials dislodged during cleaning operations shall be removed from the sewer by Contractor at the downstream manhole of the sewer section being cleaned. The passing of dislodged materials downstream of the sewer segment being cleaned shall not be permitted. In such an event, as observed or detected by the NPS or any third party, Contractor shall be responsible for cleaning the affected downstream sewers in their entirety, at no additional cost to the NPS.

B. These materials shall become the property of the Contractor, shall be removed from the site at the end of each workday, and shall be disposed of by the Contractor. Copies of records of all disposals shall be furnished to the NPS, indicating disposal site, date, amount, and a brief description of material disposed. Disposal manifests from the licensed disposal facility shall be submitted with invoices.

C. The Contractor shall keep his haul route and work area(s) neat, clean, and reasonably free of odor, and shall bear all responsibility for the cleanup of any spill.

3.07 ACCEPTANCE OF CLEANING OPERATION

A. Acceptance of sanitary sewer cleaning shall be made upon the successful completion of the television inspection and shall be to the satisfaction of the NPS. If television inspection shows the cleaning to be unsatisfactory, the Contractor shall be required to re- clean and re-inspect the sewer line at no additional cost until the cleaning is shown to be satisfactory.

B. In addition, on all sanitary sewers which have sags or dips, to an extent that the television camera lens becomes submerged during the television inspection, the Contractor shall use a high-pressure cleaner to draw the water out of the pipe, or other means, to allow the full circumferential view of the pipe and identification of pipe defects, cracks, holes, and location of service connections.

END OF SECTION

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SECTION 02762

TELEVISING SANITARY SEWER SYSTEMS

PART 1 - GENERAL

1.01 SCOPE OF WORK

The Work covered within this Section is for the internal closed-circuit television (CCTV) inspection of sanitary sewer pipes. The Contractor shall perform sewer-televising work as necessary to thoroughly document the condition of all sewers, service lateral connections, and manhole corbel, barrel, and cone-sections in the study area. The sanitary sewer and service laterals shall be carefully inspected to determine alignment, grade variations, separated joints, location and extent of any deterioration, breaks, obstacles, obstructions, debris, quantities of infiltration/inflow and the locations of service connections.

The quality of all Work specified in this Section shall meet or exceed the requirements of the National Association of Sewer Service Companies (NASSCO) Recommended Specifications for Sewer Collection System Rehabilitation (latest edition), except as described in this Section.

Applicable portions of this Section that inadvertently fall below those standards shall be corrected and maintained at the NASSCO standards as a minimum requirement, at no additional cost to the NPS.

1.02 REQUIREMENTS

A. The Contractor shall inspect the sewer interior using a color closed circuit television camera (CCTV) and document the inspection on a digital recorder. All inspection videos shall be captured in either MPEG or Windows Media Video (.WMV) file format and saved portable hard drives for submittal. Each inspected main line sewer reach, referenced manhole to manhole, and each inspected sewer lateral referenced to the property address and corresponding sewer main should have an associated MPEG or WMV file. Digital photographs (.JPG files), inspection reports (.PDF files) and any handwritten inspection logs or field maps shall accompany the video inspections for each sewer reach (manhole-to-manhole) or lateral inspected.

B. Contractor shall provide inspection video, data, and reports in accordance with the requirements specified herein. Contractor shall provide all video on portable hard drive as specified. All Work will conform to current NASSCO Pipeline Assessment Certification Program (PACP) coding conventions and all software used by the Contractor will be PACP compliant. An electronic database will be provided by the Contractor in a PACP exported format approved by the NPS.

C. The Contractor shall provide comments as necessary to fully describe the existing condition of the sewer on the inspection forms.

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D. Contractor shall be responsible for modifications to equipment and/or inspection procedures to achieve report material of acceptable quality.

E. No Work shall commence prior to approval of the submitted material by the NPS. Once accepted, the report material shall serve as a standard for the remaining Work.

1.03 QUALITY ASSURANCE

A. Refer to Section 01101-"Special Requirements (Gravity Inspection Only)" for Contractor's Qualification requirements.

B. Each CCTV field inspection supervisor shall be NASSCO PACP certified. Use of PACP certified technicians to review/document defects in the office (post process) is not acceptable.

C. The inspection Contractor must have an internal quality assurance/quality control program in place and all inspection data shall be subjected to the procedures prior to submittal to the NPS. The NPS will perform QA/QC audits on submitted data.

D. QA/QC shall be performed by NASSCO PACP certified personnel.

1.04 SUBMITTALS

A. Submittals shall be submitted to the NPS for review and acceptance prior to construction in accordance with the General Conditions and specifications on the “CM-16 Transmittal Form”.

B. The following deliverables shall be submitted on a portable hard drive at the completion of inspection:

1. Inspection videos saved in MPEG format or Windows Media video format.

2. Electronic version (.pdf) of the pipe inspection reports.

3. PACP export pipe inspection database (.mdb).

4. Inspection digital photographs in JPEG format.

5. Map of sub area depicting area inspected, inspection status, asset identification numbers and mark ups.

6. QA/QC report.

C. The above deliverables shall be submitted monthly to the NPS for approval.

Application for payment shall be made after review and approval by the NPS.

D. The sewer inspection video, report documents, and sewer inspection database shall be in accordance with NPS data standards and NASSCO PACP.

1.05 NOTIFICATION

Contractor shall notify the NPS a minimum of 48-hours prior to performing any inspection work. No payment will be made for inspections performed without proper notification.

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PART 2 - PRODUCTS

2.01 EQUIPMENT

A. Closed Circuit Television Camera: The television camera used for the inspection shall be one specifically designed and constructed for sanitary sewer inspection. Lighting for the camera shall be suitable to allow a clear picture of the entire periphery of the pipe. The camera shall be operative in 100% humidity/submerged conditions. The CCTV camera equipment will provide a view of the pipe ahead of the equipment and of features to the side of the equipment through turning and rotation of the lens. The camera shall be capable of tilting at right angles along the axis of the pipe while panning the camera lens through a full circle about the circumference of the pipe. The lights on the camera shall also be capable of panning 90° (degrees) to the axis of the pipe.

The radial view camera must be solid-state color and have remote control of the rotational lens. The camera shall be capable of viewing the complete circumference of the pipe and manhole structure, including the cone-section or corbel. Cameras incorporating mirrors for viewing sides or using exposed rotating heads are not acceptable. The camera lens shall be an auto-iris type with remote controlled manual override.

If the equipment proves to be unsatisfactory, it shall be replaced with adequate equipment.

The camera unit shall have sufficient quantities of line and video cable to inspect 2 complete, consecutive sewer reaches with access approximately 750-feet apart.

The camera, television monitor, and other components of the video system shall be capable of producing picture quality to the satisfaction of the NPS. The television camera, electronic systems and monitor shall provide an image that meets the following specifications, or approved equal:

1. The gray scale shall show equal changes in brightness ranging from black to white with a minimum of five stages.

2. With the monitor control correctly adjusted, the 6-colors; Yellow, Cyan, Green, Magenta, Red, and Blue, plus black and white shall be clearly resolved with the primary colors in order of decreasing luminance. The gray scale shall appear in contrasting shades of gray with no color tint.

3. The picture shall show no convergence or divergence over the whole of the picture.

The monitor shall be at least 13-inches diagonally across the picture tube.

4. The live picture on the CCTV monitor shall be capable of registering a minimum of 470 lines horizontal resolution and be a clear, stable image with no interference.

5. Lighting intensity shall be remote controlled and shall be adjusted to minimize reflective glare. Lighting and camera quality shall provide a clear in-focus picture of the entire inside periphery of the sewers and laterals for all conditions except submergence. Under ideal conditions (no fog in the sewer) the camera lighting shall allow a clear picture up to 5 pipe diameter lengths away for the entire periphery of the sewer. The lighting shall provide uniform light free from shadows or hot spots.

6. The camera light head shall include a high-intensity side viewing lighting system to allow illumination of internal sections of lateral sewer connections.

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7. Camera focal distance shall be remotely adjustable through a range of 6-inches to infinity.

8. Picture quality and definition shall be to the satisfaction of the NPS.

9. The monitor and software shall also be able to capture and save screen images of typical sewer details and all defects. Screen images shall be embedded into the pipe inspection report document submitted with the inspection video.

10. The video camera shall be capable of displaying on screen data as specified in paragraph 3.08 herein.

11. Depth gage: The camera shall have a depth gage or approved method to measure deflection in the pipe and joint separation approved by the NPS.

12. The camera shall have zoom capabilities to be able to view the entire depth of a 20-foot-deep manhole from the bottom during inspection.

B. Lateral Video Camera

Lateral cameras may be a push type or launched from the sewer main line. Lateral cameras shall be color, shall be self-leveling, and equipped with a footage counter to provide on-screen display of footage measurement. Monitor resolution shall be as specified above in paragraph 2.01 A Close Circuit Television Camera or approved equal.

C. Video Capture System

The video and audio recordings of the sewer inspections shall be made using digital video equipment. A video enhancer may be used in conjunction with, but not in lieu of, the required equipment. The digital recording equipment shall capture sewer inspection on DVD disks or hard drive, with each sewer reach inspection recorded as an individual movie file (.MPEG, .MPG, or .WMV) or approved equal. The video files will be named in accordance with the NPS file naming convention contained in paragraph 3.11 herein.

1. The video file names will be referenced in the inspection database and in an inspection report generated in PDF format. The pipeline collection and real time video capture and data acquisition systems shall be provided.

2. The system shall use the most current PACP compliant application software and shall be fully object oriented or approved equal. It shall be capable of printing pipeline inspection reports with captured images of defects or other related significant visual information on a standard color printer.

3. The imaging capture system shall store digitized color picture images and be saved in digital format on a DVD, hard drive or approved equal. Also, this system shall have the capability to supply the NPS with inspection data reports for each line segment.

4. The Contractor shall have the ability to store the compressed video files in industry standard and approved NPS format and be transferable with the PACP compliant inspection database.

5. The Contractor's equipment shall have the ability to "Link". "Linking" is defined as storing the video time frame code with each observation or defect with the ability to navigate from/to any previously recorded observation or defect instantaneously.

6. The system shall be able to produce data reports to include, at a minimum, all observation points and pertinent data. All data reports shall match the defect severity codes in accordance with PACP naming conventions.

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7. The data-sorting program shall be capable of sorting all data stored using generic sort key and user defined sort fields.

8. Camera footage, date & manhole numbers shall be maintained in real time and shall be displayed on the video monitor as well as the video character generators illuminated footage display at the control console.

9. Digital video shall be defined as ISO-MPEG Level 1 (MPEG-1) coding having a resolution of 352 pixels (x) by 240 pixels (y) (minimum) and an encoded frame rate of

29.97 frames per second. The digital recording shall include both audio and video information that accurately reproduces the original picture and sound of the video inspection. The video portion of the digital recording shall be free of electrical interference and shall produce a clear and stable image. The audio portion shall be sufficiently free of background and electrical noise so as to produce an oral report that is clear and discernible.

10. Inspection software shall be PACP compliant versions of CUES Granite XP, WinCan, Flexidata, or approved equal.

11. The CCTV equipment/software shall be capable of producing digitized images of all sewer line defects, manhole defects, and sewer line service connections in .jpeg format.

Contractor shall plan to take digital still images of each defect, construction features and service connection to clearly depict it. More images may be necessary depending upon the condition of the pipe.

2.02 REPORTING CAPABILITIES

A. The CCTV system shall be capable of printing pipeline inspection reports with pipeline schematics and captured images of defects and other related significant visual information.

The system shall have the ability to display any combination of the following formats and features simultaneously.

The following information is mandatory for all inspections:

1. Inspection Information: Refers to the area of pipe to be inspected between 2 manholes or the address of the lateral to be inspected.

a. Project Name

b. Surveyed by (Operator/Surveyor's name)

c. Operator/Surveyor Certificate number

d. System Owner

e. Date

f. Drainage Area (tributary pump station number)

g. Time

h. Sheet number (report sheet number

i. Street Name and Number

j. Locality (Orange NPS)

k. Additional Location Information (e.g. backyard, parking lot, etc)

l. Upstream Manhole Number (NPS standard Asset Number)

m. Upstream MH rim to invert (depth)

n. Downstream Manhole Number (NPS standard Asset Number)

o. Downstream MH rim to invert (depth)

p. Direction of inspection (Upstream or Downstream)

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q. DVD Identification Number

r. Flow control (e.g. plugged, lift station, bypassed, not controlled)

s. Type of Pipe

t. Pipe Height

u. Pipe Width

v. Pipe Shape

w. Pipe Material

x. Lining Material (for lined sewers)

y. Pipe Joint Length

z. Purpose of Inspection (new line, year-end warranty, CIP R/R project, etc.)

aa. Pre Cleaning (jetter, heavy cleaning, no pre-cleaning)

bb. Media Number (Video file name)

cc. Weather

dd. Additional information/Comments

2. Observation Data: Refers to the portion of pipe where an observation is discovered.

Observations shall be noted by text descriptions and defect code number using PACP defects codes, still frame pictures and video clips captured and recorded. Each observation shall include the following:

a. Actual observation footage

b. Video reference

c. Location of defect; clock position

d. Code (Group/Descriptor/Modifier/Severity)

e. Whether it is a continuous defect

f. Whether the defect occurs at a joint

g. Severity level

h. DVD Identification number

i. DVD counter

j. Final footage

k. Video clip ID for each observation

l. Image reference (file name of photos)

m. Remarks (as appropriate or needed)

3. Formats: Standard and/or custom designed reports shall have the following formats available and shall be able to be produced in hard copy or viewed on the monitor.

a. Site Observation: Displays detailed site observation reports in landscape or portrait views.

b. Directory Report: Displays a list of all the projects sorted by pump station number and manhole number.

c. Picture Reports: Displays site data and include full size single photos or half size double photos of discrepancies.

d. Pipe Run: Displays a graphical display of the site indicating footage, observations, and comments.

e. Project Data: Displays the project, client, and Contractor information.

f. Custom Sort: Creates user-defined reports of selected site, project, and observation data.

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PART 3 - EXECUTION

3.01 GENERAL

A. Prior to inspection the Contractor shall obtain pipe and manhole asset identification numbers from the NPS to be used during inspections. Inspections performed using identification numbers other than the NPS assigned numbers will be rejected.

B. Inspection shall not commence until the sewer section to be televised has been completely cleaned in conformance with Specification Section 02761 "Cleaning Sanitary Sewer Systems."

C. Inspection of newly installed sewers (not yet in service) shall not begin prior to completion of the following:

1. Pipe air testing

2. All manhole work, including installation of inverts

3. Installation of all lateral services

4. Vacuum tests of all manholes

D. After the sewer main and/or lateral cleaning operation is completed, the line sections shall be visually inspected internally by means of color closed-circuit television. The television inspection shall be performed one line section at time.

E. CCTV inspection shall require a minimum of 2 certified personnel with PACP certifications.

1. One (1) person shall have PACP certification that will lead or supervise each field

CCTV crew for inspection and a minimum of 2-years in the role of a lead person.

2. One (1) person shall have PACP certification serving in the role as a QA/QC management supervisor.

F. Contractor shall perform sewer-televising work within 24-hours of said sewer being cleaned. If said sewer is not televised within the required 24-hour time limit, the sewer shall be re-cleaned prior to televising at no additional expense to the NPS.

G. The Contractor shall also inspect and document all manholes included in this Work. The video recording shall begin as the camera is lowered down the manhole all the way to the preset footage and continuously throughout the pipe reach until the downstream manhole is reached.

H. The Contractor shall lower the camera into the start manhole and record the camera entry into the sewer, observing the manhole as the camera enters.

I. The camera shall pan the periphery of the start and finish manhole from casting to invert.

To achieve this, the CCTV camera operator shall pan and zoom the manhole to obtain the best possible image of the manhole, including the wall, cone, and chimney section(s).

J. The depth of each manhole shall be measured to the nearest 1/10th of a foot and documented on the inspection forms. Estimates of manhole depths will not be accepted.

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K. The CCTV camera shall be positioned as close to the spring line as possible while maintaining the required equipment stability.

L. Wherever possible the inspections shall be performed in the upstream to downstream direction. All sewer segments shall be recorded in a logical order in the same direction they are cleaned and televised.

M. In the event that access to some manholes is restricted, permission may be granted by the NPS to direct the camera through the sewer in an upstream direction, against the flow.

N. When sewer conditions prevent forward movement of the camera, the camera shall be withdrawn, and Contractor shall televise the line from the opposite direction.

O. The camera shall be directed through the sewer in a downstream direction, with the flow, at a uniform, slow rate. In no case will the video camera record while moving at a speed greater than 30-feet per minute. If, during the course of the Project, the inspection is rejected due to camera speeds exceeding 30-feet per minute, the inspection recordings shall be redone, at no additional cost to the NPS.

P. If a new manhole is discovered in the field that was not on current maps, a new manhole identification number will be assigned by NPS. The NPS shall assign the manhole the next number above the highest manhole number within the sub area. The data / video files shall then be re-named to include the new MH ID, and a new CCTV inspection shall be started from the new MH ID. Contractor shall consult with the NPS for assignment of new manhole identification numbers. Contractor shall note in the inspection form comments that a new manhole ID has been assigned as well as provide a marked up map indicating the newly found manhole and assigned manhole ID.

Q. Flow levels within existing sewers to be inspected shall not exceed 5% of the pipe diameter.

If water levels prevent adequate televising of the sewer, then conducting the Work during low flow periods or other methods like plugging and bypass pumping shall be implemented.

R. For inspection of new sewers (not yet in service), the Contractor shall introduce clean water into the upstream manhole and keep water flowing until flow is observed at the downstream manhole location.

S. The survey unit shall be slowed, stopped, or backed up to perform detailed inspections of significant features. The camera shall be stopped at all defects, changes in material, water level, size, side connections, manholes, junctions, or other unusual areas. When stopped at the defect or feature, the operator shall pan the camera to the area and along the circumference of the pipe.

T. The camera unit shall be paused long enough at areas suspected of leaking to determine if a leak exists currently or if deposits have occurred.

U. The operator shall also record audio of the type of defect or feature, clock position, footage, extent, or other pertinent data.

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V. Digital photographs or screen captures shall be taken at all laterals; defects and general condition photographs shall be taken at least every 200-feet.

W. At the Contractor's discretion or direction of the NPS, the camera shall be stopped or backed up (when conditions allow) to view and analyze conditions that appear to be unusual or uncommon for a sound sewer. The lens and lighting shall be readjusted, if need be, in order to ensure a clear, distinct, and properly lighted feature.

X. Audio shall be recorded during each inspection by the operating technician, electronic voice text recognition or approved equal on the inspection video as the sewer is inspected and shall include the sewer location, identification of beginning and terminating manholes including location (address or cross streets), inspection direction, length of inspection, side sewer identification, flow information, complete descriptions of the sewer line conditions as they are encountered, description of the rehabilitation work, reason for termination, and other relevant commentary to the inspections. Voice descriptions should be made:

1. At points of pipe failure or weakness

2. At points of infiltration

3. At the location of service connections

4. At points where unusual conditions are noted, and

5. At points where digital still photos are taken.

In addition, the audio reports shall include the distance traveled on the specific run, a description of abnormal conditions in the sewer and side sewer connections as they are encountered, explanations for pausing, backing up, or stopping the survey, and the final measured center to center distances between consecutive manholes. The audio portion of the composite video shall be sufficiently free from electrical interference and background noise to provide complete intelligibility of the oral report. Audio dubbing after the inspection is prohibited.

Y. Video recordings shall include a continuous video display/readout of similar information, as described in paragraph 3.08 herein. A separate digital video file shall be made for each pipe reach inspected.

Z. Contractor shall coordinate with the NPS prior to commencement of Work to ensure inspection is accomplished in a manner acceptable to the NPS.

AA. If the video and/or audio recording is of poor quality, the NPS has the right to require a re-submittal of the affected sewer sections and no payment will be made until an acceptable video and audio recording is made, submitted to, and accepted by the NPS.

BB. Measurement for location of defects and actual length of pipe shall be by means of a calibrated meter on the camera with a digital readout on the video monitor. This readout shall be included in the video recording. Marking on cable, or the like, which would require interpolation for depth of manhole, will not be allowed. Measurement will be accurate to 1-foot per 100-feet of inspected pipe.

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CC. The Contractor inspection units shall be equipped with adequate back up equipment and spare parts so field repairs to equipment can be made and down time is minimized.

DD. The Contractor shall be responsible for all traffic control measures required to perform the Work.

EE. Lateral inspections shall be performed from the main line using a lateral launch camera or shall be pushed from cleanouts to the sewer main using sewer rods. Lateral camera travel measurements shall be displayed on screen and on the captured video.

FF. If lateral inspections are performed from the sewer main as part of the main line inspection, the lateral shall be logged in the main line inspection report per PACP requirements and the "comment" field of the main line inspection report shall be used to document the lateral identification number, defects observed, footage of all lateral defects, connecting pipes and clean outs. If lateral inspections are not performed as part of the main sewer inspection, a separate PACP pipe inspection record shall be created for each lateral. Refer to paragraph

3.10 for numbering requirements.

3.02 PRE-CONSTRUCTION INSPECTION

A. Procedure

1. Prior to any repair work, the entire sewer line (from manhole to manhole) shall be televised. The pre-construction inspection shall be used to determine whether the line has been cleaned sufficiently; to confirm the location and nature of defects; and to confirm that the proposed method of repair is proper method for the defects observed.

2. The camera shall be moved through the line in either direction at a moderate rate, stopping when necessary to permit documentation of the sewer's condition. In no case will the television camera be pulled at a speed greater than 30-feet per minute. Manual winches, power winches, TV cable, and power rewinds or other devices that do not obstruct the camera view or interfere with proper documentation of the sewer conditions shall be used to move the camera through the sewer line. If, during the inspection operation, the television camera will not pass through the entire manhole section, the Contractor shall set up his equipment so that the inspection can be performed from the opposite manhole (reverse set-up).

3. When manually operated winches are used to pull the television camera through the line, telephones, radios or other suitable means of communication shall be set up between the 2 manholes of the section being inspected to insure good communication between members of the crew.

4. The importance of accurate distance measurements is emphasized. The location of defects shall be within ± 2 feet.

5. During the internal inspection the television camera shall be temporarily stopped at each defect along the line. The Contractor shall record the nature and location of the defect. Where defects are also active infiltration sources, the rate of infiltration in gallons per minute shall be estimated by the Contractor and recorded. The camera shall also be stopped at active service connections where flow is discharging. Flows from service connections that are determined to be infiltration/inflow shall also be recorded.

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B. Documentation of Television Inspection

1. Television Inspection Logs: Printed location records shall be kept by the Contractor and will clearly show the location in relation to an adjacent manhole of each infiltration point observed during inspection. In addition, other points of significance such as locations of building sewers, unusual conditions, roots, storm sewer connections, broken pipe, presence of scale and corrosion, and other discernible features will be recorded, and a copy of such records will be supplied to the NPS. The Contractor shall record all visuals observations on a "Television Inspection Report" form.

2. Once recorded, the digital data shall be labeled and become the property of the NPS.

The Contractor shall have all readings and necessary playback equipment readily accessible for review by the NPS during the Project.

3.03 POST CONSTRUCTION INSPECTION

A. Procedure

1. After the sewer line rehabilitation has been completed, the entire sewer line from manhole to manhole shall be televised. The post construction inspection shall be used to determine whether or not all of the approved sewer line defects and infiltration sources previously located have been fully repaired to the satisfaction of the NPS.

2. The camera shall be moved through the line in either direction at a moderate rate, stopping when necessary to permit documentation of the sewer's condition. In no case will the television camera be pulled at a speed greater than 30-feet per minute. Manual winches, power winches, TV cable, power rewinds or other devices that do not obstruct the camera view or interfere with proper documentation of the sewer conditions shall be used to move the camera through the sewer line. If, during the inspection operation, the television camera will not pass through the entire manhole section, the Contractor shall set up his equipment so that the inspection can be performed from the opposite manhole or direction. (reverse-setup)

3. When manually operated winches are used to pull the television camera through the line, telephones, radios or other suitable means of communication shall be set up between the 2 manholes of the section being inspected to insure good communication between members of the crew.

4. The importance of accurate distance measurements is emphasized. The location of defects shall be within 1-foot.

5. During the internal inspection the television camera shall be temporarily stopped at each repair. The camera shall also be stopped at any unnoticed or non-repaired point source of infiltration.

3.04 SEWER BYPASSING AND DEWATERING

Contractor shall be responsible for bypassing sewer flow around his work and dewatering of sewer lines in accordance with the requirements of Section 01516 "Collection System Bypass".

Where sags or submerged sections of the sewer are encountered during TV inspection, the Contractor shall first complete inspection of the entire reach to determine the extent of such areas prior to dewatering the sewer. Dewatered sections of the sewer shall then be TV inspected.

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On all sewer mains which have sags or dips, to an extent that the television camera lens becomes submerged during the television inspection, the Contractor shall use a high-pressure cleaner to draw the water out of…