foundation.] The cathodic protection system shall include anodes, cables,
connectors, corrosion protection test stations, and any other equipment
required for a complete operating system providing the NACE criteria of
protection as specified. Insulators are required whenever needed to
insulate the pipes from any other structure. Any pipe crossing the [_____]
pipe shall have a test station. The cathodic protection shall be provided
on [Water] [Fire Protection] [Force Main] [Gas] [_____] pipes.
1.3.1
Services of "Corrosion Expert"
The Contractor shall obtain the services of a "corrosion expert" to
supervise, inspect, and test the installation and performance of the
cathodic protection system. "Corrosion expert" refers to a person, who by
thorough knowledge of the physical sciences and the principles of
engineering and mathematics, acquired by professional education and related
practical experience, is qualified to engage in the practice of corrosion
control of buried or submerged metallic surfaces. Such a person must be
accredited or certified by the National Association of Corrosion Engineers
(NACE) as a NACE Accredited Corrosion Specialist or a NACE certified
Cathodic Protection (CP) Specialist or be a registered professional
engineer who has certification or licensing that includes education and
experience in corrosion control of buried or submerged metallic piping and
tank systems, if such certification or licensing includes 5 years
experience in corrosion control on underground metallic surfaces of the
type under this contract. The "corrosion expert" shall make at least 3
visits to the project site. The first of these visits shall include
obtaining soil resistivity data, acknowledging the type of pipeline
coatings to be used and reporting to the Contractor the type of cathodic
protection required. Once the submittals are approved and the materials
delivered, the "corrosion expert" shall revisit the site the ensure the
Contractor understands installation practices and laying out the
components. The third visit shall involve testing the installed cathodic
protection systems and training applicable personnel on proper maintenance
techniques. The "corrosion expert" shall supervise installation and
testing of all cathodic protection.
1.3.2
Contractor's Modifications
The specified system is based on a complete system with magnesium
sacrificial anodes. The Contractor may modify the cathodic protection
system after review of the project, site verification, and analysis, if the
proposed modifications include the anodes specified and will provide better
overall system performance. The modifications shall be fully described,
shall be approved by the Contracting Officer's representative, and shall
meet the following criteria. The proposed system shall achieve a minimum
pipe-to-soil "instant off" potential of minus 850 millivolts with reference
to a saturated copper-copper sulfate reference cell on the underground
components of the piping or other metallic surface. The Contractor shall
take resistivity measurements of the soil in the vicinity of the pipes and
ground bed sites. Based upon the measurements taken, the current and
voltage shall be required to produce a minimum of minus 850 millivolts
"instant off" potential between the structure being tested and the
reference cell. This potential shall be obtained over 95 percent of the
metallic area. The anode system shall be designed for a life of
twenty-five (25) years of continuous operation.
1.3.3
Isolators are required to insulate the indicated pipes from any other
SECTION 13110A
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