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Section 38 – Sewer and Storm Drain Construction

38-10.03.B Storm Drain

When indicated in the Contract, or when inferior products or construction methods are used

or visual inspection by television or lamping indicates a potential for excessive deflection, the

following test method shall be used:

Where PVC or HDPE pipe are installed as drain pipe, a deflection test shall be made by

the Contractor upon completion and acceptance of all backfill operations and prior to

placement of the finished surface, if any. Deflection testing shall be conducted no

sooner than thirty (30) Calendar Days following completion and acceptance of all backfill

operations, unless otherwise approved by the Agency.

The deflection testing shall be witnessed by the Inspector and shall be conducted by the

Contractor at the Contractor's expense. Unless otherwise shown on the Plans or in the Special

Provisions, one-hundred percent (100%) of all mainline PVC and HDPE drain pipe installed

shall be deflection tested for excessive vertical deflection using a pre-sized, rigid mandrel or

"Go-No-Go" device approved by the Agency. The mandrel size shall be clearly labeled and

shall be sized so as to provide a diameter of at least 92.5% of the "Base Internal Diameter" per

ASTM D 3034 for PVC and ASTM F 894 for HDPE. Base inside diameters for larger diameters

of PVC pipe may be found in ASTM F 679.

The Contractor shall remove, replace, and retest any pipe section through which the

mandrel is unable to pass. The use of any rerounding device or similar method to correct or

reduce over deflection will not be permitted. Re-tests for deflections shall be made at the

Contractor’s expense.

38-10.04 Television Inspection (TVI)

A closed circuit television inspection (TVI) shall be conducted prior to new sewer or storm

drain pipeline acceptance and prior to and after completion of pipeline rehabilitation projects.

The TVI shall document and verify:

1. The overall condition of the pipeline,

2. The location of service taps,

5. That post-installation inspection per the Contract has taken place.

In addition, TVI documentation shall indicate:

1. Consistent use of standard forms and codes

2. Uniform compliance with setup and inspection procedures

3. Quality pictures and audible records

4. Suitable camera speed, lighting, and panning

5. Accuracy when recording file names and electronic data.

The TVI shall be documented in an electronic report (TVI Report) and digital video recording

as specified herein. Contractors shall comply with the County of Sacramento Department of

Water Quality Television Inspection Manual Draft 2001, or most current edition (Television

Inspection Manual), available at the Water Quality Department Customer Service office at

10545 Armstrong Ave., Suite 101, Mather, CA. 95655, phone (916) 876-6100. The Television

Inspection Manual contains the requirements for collection and documentation of TVI data. It is

the Contractor’s responsibility to verify that electronic documentation is in the latest, most up-to-

date format required by the Agency. TVI of new construction shall be performed after all

required testing specified in the Contract and/or this Section is satisfactorily completed. The

cleaning of sanitary sewers or storm drains shall be performed prior to the TVI in a separate

operation, unless otherwise specified. Unless otherwise shown or specified in the Contract, the

Contractor shall perform a TVI on all sewers between manholes or manhole to flusher

branch/stub or to existing manholes, as necessary, to video a complete segment, all storm

drains between manholes or to existing manholes, as necessary, to video a complete segment,