02535 CCTV Inspection.doc

Aberdeen Area Indian Health Service

Revised [Insert Date] Oklahoma City Area Indian Health Service

April 2023

SECTION 02535 –

SEWER MAIN CLEANING AND TELEVISING

PART 1 - GENERAL

1.1 SUMMARY

A. Section Include:

1. Sewer Cleaning:

a. Sewer mains.

b. Sewer manholes.

c. Sewer laterals.

2. Closed Circuit Television (CCTV) Inspection:

a. Sewer mains.

b. Sewer manholes.

c. Sewer laterals.

1.2 REFERENCES

A. NASSCO Manuals and Standards

B. NASSCO Jetter Code of Practice

1.3 SUBMITTALS

A. Prior to CCTV Inspection:

1. Anticipated cleaning equipment and methods.

2. Sample of prior sewer inspection presented via an electronic media recording:

a. Sewer main.

b. Sewer manhole.

c. Sewer lateral.

3. Sample sewer inspection log report:

a. Sewer main.

b. Sewer manhole.

c. Sewer lateral.

4. Approved submittals will serve as the standard for acceptance work performed.

B. After CCTV Inspection:

1. Electronic media recording of CCTV inspection.

2. Log Reports (electronic document, PDF):

a. Sewer main.

b. Sewer manhole.

c. Sewer lateral.

1.4 NOTIFICATION

A. Written notices delivered to each home 48 hours prior to commencement of work on a particular section.

B. Notice to include telephone number of contractor to contact for inquires and complaints.

C. Provide system Owner and home owner or occupant with information on the summary of work to be completed, timing, and duration of service interruption expected.

D. In the event service cannot be restored within the time identified proved additional verbal or written contact to owner or occupant.

1.5 QUALITY ASSURANCE

E. Sewer Main and Manhole Cleaning:

1. 2 years of experience cleaning sewer mains and manholes.

F. Sewer Inspection:

1. Operator certified by National Association of Sewer Service Companies (NASSCO) in the following:

a. Pipe Assessment Certification Program (PACP) for inspection of sewer mains.

b. Manhole Assessment Certification Program (MACP) for inspection of manholes.

c. Lateral Assessment Certification Program (LACP) for inspection of sewer laterals.

2. Or 3 years inspecting sewer lines and manholes of similar size.

1.6 CLEANUP

A. Remove all construction debris and sewer material waste from the project site.

B. Conform to all local and state codes.

PART 2 - PRODUCTS

2.1 CLEANING

A. Hydraulic Jetting:

1. Truck mounted, water reservoir, fill system, auxiliary engines, pump, water piping, and hydraulically driven hose reel.

2. Pressure rated hose, minimum 600 feet in length.

3. Capable of selecting two or more high-velocity nozzles.

4. Capable of producing a scouring action from 15 to 45 degrees in all size lines designated to be cleaned.

5. High pressure High-velocity hand gun system, capable of producing flows from a fine spray to a solid stream.

6. Capable of removing roots, hardened grease and sand from 6-inch sewer service lines.

a. Capable of maneuvering around 45 degree bends.

B. Chain Root Cutters:

1. Hydraulically driven.

2. Rotating cutters

C. Rodding Machine:

1. Sectional or continuous heat-treated steel rod type

2. Capable of holding a minimum of 750 feet of rod

3. Machine fully enclosed with an automatic safety clutch or relief valve.

2.2 CCTV EQUIPMENT

A. CCTV equipment specifically designed and constructed for this application.

B. Camera, Television Monitor, and Other Components: High resolution color video minimum 460H-line and 400V-line resolution color video picture.

C. Pan and tilt type, capable of turning at right angles to pipe’s axis over an entire vertical circle (minimum pan of 180 degrees and rotation of 360 degrees).

D. Lighting: Suitable to allow clear picture of entire inner pipe wall extending at least 10 feet in front, including black High Density Polyethylene (HDPE) pipe.

E. Operative in 100 percent humidity conditions.

F. Image: Capable of self-righting itself.

G. Footage counters accurate to +/- 2 feet for every 1,000 feet.

H. Include data view display feature cable of showing the following information.

A. Acceptable Manufacturers

B. Materials C. Accessories

2.3 RECORDING MEDIA

A. Digital video files saved in a common format easily played and reproduced on standard open source media software.

B. If a specific program is needed to view the video files, submit for preapproval.

C. Digital video files saved on electronic media provided on USB flash drives.

D. Contents of digital video files detailed in Part 3.5 Field Documentation.

E. Opening Screen:

1. Date of inspection.

2. Pipe structure identification number.

3. Upstream and downstream node identification numbers.

4. Street address.

5. Pipe size.

6. Normal (upstream to downstream) or reverse (downstream to upstream) pull.

F. Audio:

1. Description of inspection setup, including related information from log form (when provided).

2. Unusual conditions.

3. Operation changes (e.g., when inspection is not permitted by defects).

4. Verbal description and location of each defect.

5. Verbal description and location of each service connection.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Verify location, condition, and material of existing sewer lines, manholes, and septic tanks designated to be cleaned and inspected.

B. Verify access to sewer lines, manholes, and septic tanks designated to be cleaned.

C. Provide access to operation at all times to the Owner and Project Engineer.

3.2 PREPARATION

A. Protection of Sewers and Manholes:

1. Take care not to cause further damage to either existing sewer lines or sewer manholes.

2. Notify Owner of damaged sewer lines or manholes prior to beginning Work.

B. Protection of Public and Private Property:

1. Take care not to cause damage to private or public property during cleaning and inspection.

2. Promptly repair any damage to private or public property caused by cleaning or inspection activities.

3. Promptly investigate any and all reports of sewage backing up into fixtures served by the sewer segment that is being cleaned or inspected.

3.3 CLEANING

A. General

1. Select equipment and cleaning methods based on condition sewer pipe, manholes, and septic tanks at the time of work.

2. Clean sewer lines, manholes, and septic tanks prior to inspection.

3. Maintain flow in sewer lines during cleaning.

4. Notify Owner immediately when pipe is damaged during cleaning.

5. If special circumstances arise that prevent the cleaning and video inspection to progress immediately notify Owner and Project Engineer.

6. Instruction as how to proceed given the special circumstances will be given by the Owner.

B. Pipe Cleaning

1. Remove foreign materials including, but not limited to, sludge, mud, sand, gravel, rocks, bricks, grease, pieces of broken pipe, roots, sticks, hardened debris, protruding taps, foreign materials, etc., from sewer lines, manholes, and septic tanks to allow for complete inspection.

2. Restore sewer lines to 95% of design capacity

3. A minimum of 3 passes, from cleanout to cleanout, when using a jetter.

4. When cleaning of a segment cannot be successfully performed from one manhole, setup the equipment on the other manhole and attempt cleaning again.

5. Maintain flow during cleaning. Take precautions not retard the flow in the sewer in order to prevent flooding due to obstructions caused by cleaning.

a. Contractor is responsible for all cost associated with cleaning due to backups.

6. Provide camera during cleaning.

7. Progress cleaning continuously from one manhole to the next manhole.

8. Cleaning may be accomplished by physically impacting with hydraulic driven chain root cutters.

a. Select most appropriate cleaning method to produce the results desired.

b. Take care not to damage pipe

c. Use chain root cutters in conjunction with televising equipment so that the rotating chains can be viewed during operation.

d. If viewing simultaneously is not an option use is at the sole discretion of the contractor who will be responsible for all damage caused.

9. Do not utilize power rodding machines in the areas where excavations will be difficult due to surface conditions.

10. Only physical removal of roots is allowed, chemical removal is not.

11. Collect and remove debris and waste from sewer system after each segment cleaned and remove offsite at minimum by the end of each work day.

12. Do not allow waste to move from cleanout to cleanout.

13. Do not pile or store waste in roadway.

14. Dispose of waste as directed by local jurisdiction, Owner or Project Engineer.

C. Water Usage

1. All water needed for the cleaning process to be purchased from Jackson County RWD #3 at a rate of $6.95 per thousand gallons. Prior to utilizing water for cleaning, coordinate with Jackson County RWD #3 at the number listed below:

Jackson County RWD #3 Office- 785-364-3056

D. Septage Disposal

2. All waste generated from the cleaning process to be collected and disposed of at the septage lagoon location located approximately 2-miles to the north of the project site at the intersection of 158th Rd and Hwy O.

3. Prior to disposing waste from cleaning, coordinate with PBPN Wastewater Department by contacting the PBPN Nation Wastewater Department at the numbers listed below:

Marcus - 785-608-7773

Ricardo - 785-845-3613

E. Protruding Service Connections

1. Remove protruding service connections that do not permit the passing of the televising camera or, when in the opinion of the Utilities Representative, might be problematic in the performance of a future sewer repair.

2. Remove protruding taps without breaking or cracking service connection.

3. Perform smooth cut without jagged-edges.

4. Do not remove the tap beyond the exterior of the mainline pipe.

5. Do not use impacting method to remove protruding service connections.

6. Remove cutting from sewer system and dispose of in accordance with local jurisdiction.

7. Video inspect protruding taps prior to and after removal.

F. Manhole Cleaning

1. Utilize high pressure hand gun system to clean interior of manholes.

2. Scour and wash all component of manhole including cone, walls, troughs and inverts.

3.4 CCTV INSPECTION

A. General

1. Inspect sewer lines, manholes, and septic tanks after cleaning.

2. Clean or remove blockage in segments that do not permit inspection.

3. Maintain flow in sewer lines during inspection. Utilize blocking, plugging or by-pass pumping when flow does not permit inspection.

B. Camera Operation

1. Manholes

a. Starting at the rim, place camera at center of manhole.

b. Rotate camera clockwise until 360 degree panorama is complete.

c. Lower camera 3 vertical feet.

d. Repeat b and c until camera has reached the manhole bench.

e. Temporarily halt camera at points of interest long enough to identify feature.

2. Sewer Pipes

a. Place camera at center of pipes axis.

b. Speed: Maximum of 30 feet per minute when recording.

c. Temporarily halt camera at points of interest long enough to identify feature.

d. Begin counter at manhole wall.

3. Septic Tanks

a. Place camera at center of inlet access port.

b. Rotate camera clockwise until 360 degree panorama is complete.

c. Repeat at tank outlet.

C. Recording

1. Supply a visual and audio recording of problem areas points of interest in the sewer lines and manholes, including but not limited to cracks and fractures, infiltration, misalignments, sags, protruding services, exposed gaskets, and service connections.

2. Recordings play back speed must be at the same speed as it was recorded.

3. Record without distortion or outside interference.

4. Record segments of sewer in its entirety with no breaks or interruptions. Each segment shown on the electronic media recording format must have its own chapter titled with the beginning and end point of the pipe segment.

5. Show continuous footage reading on recording image. Place on screen where it is clearly visible and does not block the focal point of the camera.

6. Keep camera lens clean and clear. Clean or replace lens when material or debris obscures images or causes reduced visibility prior to proceeding with recording operation.

7. Keep camera lens above visible water level. Only allow camera lens to submerge below water level when sags are clear and identifiable.

D. Sewer Flow Requirements

1. Do not exceed depth of flow for respective pipe sizes as follows:

Table 1: Maximum Depth of Flow for TV Inspection

2. Reduce flow by blocking, plugging and/or bypass pumping when upstream manhole exceeds the allowable levels.

3. Maintain isolation while camera is moving and recording.

4. Prevent backups into any structure and sewer overflows when plugging or blocking lines.

5. Maximum time without service for any property is 8 hours.

6. Any service out for more than 8 hours will require bypassing.

3.5 FIELD DOCUMENTATION

A. Maintain copy of all inspection documentation for one (1) year after completion.

B. The written inspection logs shall include but not be limited to the following information:

1. Project title.

2. Operator name.

3. Time of day.

4. Manhole to manhole section.

5. Pipe segment length.

6. Pipe material.

7. Pipe size (I.D.).

8. Pipe depth of bury (to top of pipe).

9. Compass direction of viewing.

10. Direction of camera’s travel.

11. Locations and description of service connections.

12. Locations and descriptions of defects such as the following:

a. Cracked pipe – longitudinal, radial, spiral, multiple broken, deformed, collapsed or holes in pipe.

b. Pipe obstructions – cause for failed inspection.

c. Infiltration – observable, evidence of, seeps into line, pours into line.

d. Side connections – attempt to identify.

e. Cleanouts – existing or missing locations.

13. Manholes: include: size, direction, and quantity of connecting pipes; manhole construction type; manhole depth from invert of channel to top of lid; total length of adjusting rings; diameter of lid casting; current infiltration or signs of past infiltration; and condition or absence of channel.

14. Manhole condition including cracked concrete, incoming ground water, access lid condition, inlet piping condition, and any other noted defects.

15. Septic tank condition including cracked concrete incoming ground water, access lid condition, inlet piping condition, and any other noted defects.

16. Tape counter reading at beginning and end of each cleanout to cleanout pipe segment.

END OF SECTION

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SEWER MAIN CLEANING AND TELEVISING

SECTION 02535 - 4