33 01 30.11 - Television Inspection Of Sewers.pdf

33 01 30.11 - TELEVISION INSPECTION OF SEWERS

Herbert, Rowland & Grubic, Inc. 33 01 30.11 - 1 000598.0465

SECTION 33 01 30.11 - TELEVISION INSPECTION OF SEWERS

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Pipeline flushing and cleaning.

2. Television inspection of sewer pipelines.

3. Audio-video recording of pipeline interior.

B. Related Requirements:

1. Section 01 50 00 - Temporary Facilities and Controls: Safety requirements when bypassing sewage flow.

1.2 SCHEDULING

A. Schedule Work of this Section after all sanitary sewer mains and laterals have been installed and tested.

1.3 SUBMITTALS

A. Section 01 33 00 - Submittal Procedures: Requirements for submittals.

B. Contractor shall provide video recordings in electronic format on an external storage device and typed video logs of all televised pipe sections.

C. Upon completion of the work, all videos recorded and all external storage devises utilized to store videos and/or video logs during the television inspection shall become the property of the Owner.

D. Inspection Logs:

1. Submit cleaning and television inspection logs for each section of sewer line to be rehabilitated.

2. Include following minimum information:

a. Date of television inspection.

b. Sewer section and manhole number.

c. Stationing and location of lateral services, wyes, or tees.

d. Date and clock time references.

e. Distance along reach (tape counter footage).

f. Label.

g. Verbal confirmation of sewer section and television direction in relation to direction of flow.

h. Verbal description of pipe size, type, and pipe joint length.

i. Pipe joints.

j. Infiltration/inflow defects.

k. Cracks.

l. Leaks.

Herbert, Rowland & Grubic, Inc. 33 01 30.11 - 2 000598.0465

m. Offset joints.

n. Type of weather during inspection.

E. Submit specific detailed description of proposed bypass pumping system, including written description of plan addressing schedule, quantity, capacity, and location of pumping equipment.

F. Submit spill plan to address any spills that might occur.

G. Field Quality-Control Submittals: Indicate results of Contractor-furnished tests and inspections.

1.4 QUALIFICATIONS

A. Required recording shall be performed by a firm actively engaged, experienced and knowledgeable in video recording of sewer conditions on utility projects. The Engineer reserves the right to request sample work and investigate the qualifications of any firm chosen to perform this work.

PART 2 - PRODUCTS

2.1 PORTABLE HARD DRIVE

A. Description: Digital video formatted portable hard drives.

B. Audio track containing simultaneously recorded narrative commentary and evaluations of videographer, describing in detail condition of pipeline interior.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Section 01 73 00 - Execution Requirements: Requirements for application examination.

B. Verify location of sewer pipelines to be inspected.

3.2 PREPARATION

A. Section 01 73 00 - Execution Requirements: Requirements for application preparation.

B. Flush and clean pipeline to remove sludge, dirt, sand, stone, grease, and other materials to ensure clear view of interior conditions.

C. Debris:

1. Intercept flushed debris at next downstream manhole using weir or screening device.

2. Remove and dispose of debris off Site.

D. Bypassing:

1. Refer to Section 01 57 28 - Temporary Flow Control for requirements.

Herbert, Rowland & Grubic, Inc. 33 01 30.11 - 3 000598.0465

2. Furnish temporary bypass pumping system around Work area for time required to complete television inspection.

3. Provide safety precautions, including barricades, lights, and flaggers as specified in Section 01 50 00 – Temporary Facilities and Controls.

3.3 APPLICATION

A. Closed-Circuit Television (CCTV) Camera System:

1. Use cameras specifically designed and constructed for closed-circuit sewer line inspection.

2. Use camera equipment with pan-and-tilt capability to view each lateral connection at multiple angles.

3. Use camera capable of moving both upstream and downstream with minimum

1,000 feet horizontal distance within one setup and using direct-reading cable position meter.

B. All taping to be done following successful cleaning prior to repair (if needed) and following successful installation of sanitary sewer mains and service lateral reconnections. Conduct taping during periods of no flow during bypass pumping operations to ensure unobstructed views of the completed work. Provide flow control measures as necessary at no additional costs.

C. Owner and Engineer shall accompany Contractor during taping. A 48-hour notice shall be given to the Owner and Engineer prior to videotaping.

D. Control direction of travel, panning rates, and zoom in-out rates in a manner that produces clarity of subject during playback.

3.4 FIELD QUALITY CONTROL

A. Section 01 40 00 - Quality Requirements: Requirements for inspecting and testing.

B. Pipeline Inspection:

1. Audio-video record sections of sewer pipeline between designated manholes.

2. Identify and record locations of flat grades, dips, deflected joints, open joints, broken pipe, protrusions into pipeline, and points of infiltration.

3. Locate and record service connections.

4. Record locations of pipeline defects, connection horizontal distance in feet, and direction from manholes.

5. Video-record with pipe section plugged to view 100 percent of pipe ID.

6. Use flow-control methods as specified for bypass pumping system to eliminate surcharging and to reduce flow.

END OF SECTION