3.8.2
Excavation
In the event rock is encountered in providing the required depth for
anodes, the Contractor shall determine an alternate approved location and,
if the depth is still not provided, an alternate plan shall be submitted to
the Contracting Officer. Alternate techniques and depths must be approved
prior to implementation.
3.9
SPARE PARTS
After approval of shop drawings, and not later than three (3) months prior
to the date of beneficial occupancy, the Contractor shall furnish spare
parts data for each different item of material and equipment specified.
The data shall include a complete list of parts, special tools, and
supplies, with current unit prices and source of supply. In addition, the
Contractor shall supply information for material and equipment replacement
for all other components of the complete system, including anodes, cables,
splice kits and connectors, corrosion test stations, and any other
components not listed above. [The Contractor shall furnish a reference
cell on a reel with 120 m 350 feet of conductor, along with other
accessories, and a digital voltmeter that can be used in the maintenance of
this cathodic protection system. Use of this equipment shall be
demonstrated in actual tests during the training course, which shall
include a description of the the equipment and measurement of the
pipe-to-soil potential, rainfall, and gas company voltages.]
3.10
SEEDING
Seeding shall be done by the Contractor, as directed, in all unsurfaced
locations disturbed by this construction. In areas where grass cover
exists, it is possible that sod can be carefully removed, watered, and
stored during construction operations, and replaced after the operations
are completed since it is estimated that no section of pipeline should
remain uncovered for more than two (2) days. The use of sod in lieu of
seeding shall require approval by the Contracting Officer.
3.11
SYSTEM TESTING
The Contractor shall submit a report including potential measurements taken
at adequately-close intervals to establish that minus 850 millivolts
potential, "instant-off" potential, is provided, and that the cathodic
protection is not providing interference to other foreign pipes causing
damage to paint or pipes. The report shall provide a narrative describing
how the criteria of protection is achieved without damaging other pipe or
structures in the area.
3.12
CLEARING OF TREES AND UNDERBRUSH
In the areas of the anode beds, all trees and underbrush shall be cleared
and grubbed to the limits shown or indicated.
-- End of Section --
SECTION 13110A
Page 30
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