Attachment_A_-_Special_Provisions_for_CCTV_Inspection.pdf

CLOSED CIRCUIT TELEVISION (CCTV) INSPECTION OF SANITARY SEWER

LINES AND MANHOLES

PART 1 GENERAL

1.1 REFERENCES

A. NASSCO’S Pipeline Assessment Certification Program Reference Manual, v8.0

1.2 SUBMITTALS

A. Workplan and Schedule. Contractor shall submit a preliminary bar chart inspection schedule for the project. The schedule should show when and where the Contractor will be working.

B. Sample Work Product. Contractor shall submit sample work product consisting of CCTV inspections within the last 6 months. Submittals should include at least 3 segments or 1,000 feet of pipe including PACP exchange databases, CCTV video recordings, PACP reports, digital photographs, inspection logs, and associated electronic files.

C. Notification Letter. Contractor shall submit a copy of the proposed notification letter to distribute to affected property owners.

D. Traffic Control Plan. Contractor shall obtain encroachment permits as necessary and submit traffic control plan directly to the appropriate jurisdiction for approval.

E. Personnel List and Certifications. The Contractor shall submit NASSCO certifications of CCTV personnel.

F. Bi-Weekly Progress Reports. Bi-weekly progress reports shall, at minimum, include work completed last two weeks, planned activities for the next two weeks, and list of any specific issues/concerns such as delays, access to sewer assets, locating sewer assets, major defects, manholes recommended for level 2 inspection, etc.

G. CCTV Inspection and Reports. During CCTV inspection activities, the

Contractor shall submit a complete inspection package electronically to the

County.

H. Manhole Location Criteria Form. During inspection activities, the Contractor shall submit completed manhole location criteria form.

I. Corrected Sewer Maps (upon completion of each District). After completion of inspection activities for each Sewer District, Contractor shall submit a copy of the sewer map provided with any red line changes that were identified in the field.

1.3 QUALITY ASSURANCE AND QUALITY CONTROL

A. Contractor shall perform internal quality assurance and quality control

(QA/QC) review of all inspection data prior to submittal. The County reserves the right to perform independent QA/QC review and reject incomplete, inaccurate, or non-compliant inspections for correction at no additional cost.

PART 2 PRODCUTS

2.1 CCTV Equipment

A. Video equipment shall include a television camera in color format specifically designed and constructed for operation in connection with sewer inspection and for operation in sewers under 100% humidity conditions.

B. Lighting and camera quality shall produce a clear, in-focus picture of the entire periphery of the pipe for a minimum distance of six feet (6’).

C. The CCTV inspection shall be continuous color digital recording in MPEG 4 format for each pipe segment inspected.

PART 3 EXECUTION

3.1 CCTV Inspection

A. The Contractor shall furnish all materials, tools, equipment and labor required to perform CCTV inspection; and CCTV inspection equipment shall be approved by the Engineer.

B. All CCTV inspections must be performed by NASSCO certified personnel and

CCTV shall be performed per NASSCO Pipeline Assessment Certification

Program (PACP).

C. The manhole numbers on the plans shall be used. CCTV inspection shall be from manhole-to-manhole, and sanitary sewer service shall be maintained at all times during this operation.

D. Videos must clearly show the area surrounding the manhole before the camera enters the manhole.

E. The camera shall be moved through the line, preferably in the direction of the sewage flow, at a moderate rate, stopping at joints, lateral connections, and when necessary to permit proper documentation of the sewer’s condition. In no case shall the television camera be operated at a speed greater than 30 feet per minute. Manual winches, power winches, TV cable, and powered 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.

F. For small diameter pipelines and difficult access easement locations where conventional crawler access is impractical, push camera inspections may be acceptable as determined by the County.

G. Contractor is responsible for providing and delivering 72 hour advance notices to affected property owners. Notices must be submitted and approved by the County.

H. In the event of high flows or surcharge conditions, bypass pumping may be required as determined and approved by the County.

I. Any damage to the existing sanitary sewer main caused by the Contractor’s operations shall be repaired by the Contractor, to the satisfaction of the

Engineer, all at the Contractor’s sole expense, and no additional compensation will be allowed therefore.

J. If during inspection operation, the camera cannot pass through the entire sewer section due to an obstruction, Contractor shall set up their equipment so that the inspection can be performed from the opposite manhole (reverse run) at no additional cost. If the pipeline cannot be adequately inspected due to debris, grease, roots, or other obstructions, Contractor shall immediately notify the County. Contractor shall document the condition with photograms and video. Contractor will be paid only the amount of lineal footage that was satisfactorily inspected, recorded, and submitted to the County.

K. PACP pipe ratings shall be included for each pipe segment inspected.

L. If the Contractor encounters a buried manhole during CCTV inspection, Contractor shall attempt to CCTV through the buried manhole or conduct the inspection in the reverse direction if possible. Contractor shall notify the

County of the buried manhole and if the manhole needs to be exposed to complete the inspection.

M. If an undocumented manhole is encountered, the Contractor shall use the upstream manhole ID followed by the letter “A”.

N. If the Contractor encounters a surcharging manhole or a backed up line, the contractor shall immediately notify the County’s sewer department at

(650)363-4100.

3.2 Documentation of CCTV Inspection

A. Deliverables shall be submitted electronically and shall include PACP exchange databases, CCTV videos, PACP reports, digital photographs, inspection logs, and associated electronic files. Hard copies and USB drives shall only be provided if requested by the County.

B. Submitted CCTV inspections, when replayed on a monitor, shall be clear and in-focus, and shall include a continuous on-screen display containing, at a minimum, the date of video inspection and identification of the sanitary sewer line and segment (street location, upstream and downstream manhole numbers) of the line being viewed, and footage. The number designations for existing sanitary sewer manholes (SSMH#) shall be as shown on the Plans.

C. If, in the opinion of the Engineer, the submitted CCTV inspections are of poor quality such the Engineer is unable to evaluate the condition of the sewer lines, the Engineer may reject the USBs or DVDs and require the CCTV inspection to be repeated and new USBs or DVDs submitted to the Engineer for review and acceptance.

D. All submitted DVDs or videotapes will become the property of the County.

E. The video files should be named in accordance with the following convention:

Upstream Manhole ID-Downstream Manhole ID_yymmdd_D

Where:

• Upstream Manhole ID and Downstream Manhole ID

• yymmdd is the date of inspection

• D is the camera direction, downstream or upstream (D or U)

3.3 Manhole Inspections

A. All manhole inspections must be performed by a NASSCO certified personnel and shall be performed per NASSCO Manhole Assessment Certification

Program (MACP).

B. The Contractor shall perform NASSCO MACP Level 1 manhole inspections for each manhole and flushing inlet in the project area.

C. Depending on the manhole condition, the County may request the Contractor to perform a MACP Level 2 manhole inspection. Contractor may also notify and/or recommend manholes in need for Level 2 inspection to the County.

D. The Contractor shall complete the Location Criteria Form for each manhole and flushing inlet.

3.4 Manhole Inspection Documentation

A. Deliverables shall be submitted electronically and shall include MACP exchange databases, CCTV videos, MACP reports, Location Criteria Forms, digital photographs, inspection logs, and associated electronic files. Hard copies and USB drives shall only be provided if requested by the County.