Project Name
Project Number
UEPH Complex
Statement of Work
26 November 2001
4-22.6.7 Hazardous storage structures. Structures with hazardous products as identified by
the installation.
4-22.7
Cast iron pipe. Shall be treated as follows:
4-22.7.1 Below 10,000 Ohm-cm: For soil resistivity below 10,000 Ohm-cm at pipeline
installation depth, provide CP, bonded joints, and protective coatings.
4-22.7.2 Between 10,000 and 30,000 Ohm-cm: For soil resistivity between 10,000 and 30,000
Ohm-cm at pipeline installation depth, provide bonded joints only.
4-22.8
Copper water service lines: Piping will be dielectrically isolated from ferrous pipe.
Dielectric isolation shall conform with NACE RP-0286.
4-22.9 Ductile iron piping systems: Conduct an analysis (except for ductile iron piping under
floor in soil) to determine if CP and/or bonded or unbonded coatings are required. Unbonded
coatings are defined in ANSI/AWWA C105/A21.5.
4-22.10
Economic analysis: Conduct an economic analysis to determine if CP and
protective coatings should be provided for gravity sewer lines and the following structures in soil
resistivity conditions above 10,000 Ohm-cm:
4-22.10.1
Potable water lines.
4-22.10.2 Concentric neutral cable.
4-22.10.3 Other structures. Buried and submerged ferrous metallic structures not covered
above.
4-22.11
Contact with concrete. Ferrous metallic piping passing through concrete shall not be
in contact with the concrete.
SOW-105
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