3.02
3.03
A.
3.05
A,
ROOT CUTTING:
The Contractor shall use mechanically powered equipment designed to cut roots in
pipelines.. Selection of equipment shall be based upon field conditions such as access to
manholes, quantity and size of roots, size of sewer, depth of flow, etc.
All debris material resulting from the root cutting operation shall be decanted and disposed of
at the City landfill, and in a method acceptable to the Engineer. All root cutting shall be
performed in advance of pipe television inspection.
Acceptance by the Engineer of the root cutting results will be based on the results of television
inspection. If the results are unsatisfactory, the Contractor shall repeat the root cutting
operation until accepted by the Engineer at no additional cost to the Owner.
CLOSED-CIRCUIT TELEVISION (CCTV) INSPECTION:
Closed-circuit television (CCTV) inspection shall be done one manhole section at a time,
and the section being inspected shall be suitably isolated from the remainder of the sewer
line as required. No sanitary sewer lines shall be inspected until they have been cleaned.
The camera shall be moved through the line in either direction at a uniform slow rate,
stopping when necessary to insure proper documentation of the sewer’s condition, but in no
case will the television camera be pulled at a speed greater than 30 feet per minute.
Measurement for location of defects shall be accurately measured from the starting
manhole by a metering device mounted on the camera or by other means acceptable to
the Engineer. Marking on cable, or the like, which would require interpolation for depth
of manhole, will not be allowed. Measurement meters will be accurate to 0.2 feet. A
measuring target (or the sealing packer) in front of the television shall be used as an exact
measurement reference point, and the meter reading shall show this exact location of the
measurement reference point.
Electronic video equipment shall be capable of displaying and recording, at a minimum,
the following data for each pipe joint:
1. Project Identification
2. Date recorded
3. Footage counter
4, Sewer reach identification (street location, start MH and second MH)
DOCUMENTATION:
Printed location records shall be kept by the Contractor which will clearly show the exact
location, in relation to adjacent manholes, of each defect discovered by the television
camera. In addition, other points of significance such as locations of laterals, unusual
conditions, collapsed sections, and other discernible features will be recorded and a copy of
such records will be supplied to the Engineer.
2019 CIPP Lining Project Cleaning, Root Cutting and Television Inspection of Pipelines
Nashua, NH 0244 ]-3
