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 5. Economic feasibility of providing CPS shall be evaluated for the
following buried or submerged systems:
a.
Gravity sewer lines, force mains
b.
Existing steel waterfront structures
c.
Reinforcing steel in concrete
d.
Cast/ductile iron potable water lines in soils with resistivities
greater
than 30,000 ohm-cm along its entire length
e.
Concentric neutral cable
f.
Below ground hydraulic elevator cylinders
g.
All buried or submerged metallic structures not mentioned above.
Implementation of CPS on these systems shall be based on life-cycle
economics. The requirements for CPS shall be determined by the corrosion
engineer.
6. When rehabilitating existing steel sheet pile bulkheads by driving new
sheets outboard of the existing, include the following requirements for the
CPS:
a. Electrically isolate new piling from old piling.
b. Electrically isolate tie rods from existing sheet piling by cutting a
hole in the old pile and providing a dielectric sleeve through the pile.
c. Coat tie rods and new piling on all sides.
d. Consider CPS as part of the total corrosion protection system. Use
conventional soil side anodes to protect the seaside and landside of the pile
and to protect the tie rods if field tests indicate this to be feasible.
Otherwise, consider using a deep anode bed system. Waterside anodes are
appropriate only in areas not subject to maintenance dredging, water
turbulence from ship/boat traffic, normal or storm generated heavy wave
action, or constant movement of the sea bottom. Conduct a site survey to
determine the appropriate anode configuration and cathodic protection system
requirements.
7. CPS shall provide protective potentials according to the requirements of
the National Association of Corrosion Engineer (NACE) Standard RP01-69
(latest revision), Control of External Corrosion on Underground or Submerged
Metallic Piping Systems and NACE Standard RP02-85 (latest revision), Control
of External Corrosion on Metallic Buried, Partially Buried, or Submerged
Liquid Storage Systems.
8. Architect-Engineer (A-E) CPS surveys and designs shall be accomplished
under the supervision of one of the following individuals:
a. Registered Professional Corrosion Engineer
b. Registered Professional Engineer who is also a NACE certified
corrosion protection specialist or cathodic protection specialist or has a
minimum of five years of experience in the applicable CPS
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