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 (1) Underground Fuel Storage Tanks (40 CFR 280 and 281)
(2) Fuel and POL Pipelines (49 CFR 195)
(3) Natural Gas Pipelines (49 CFR 192)
(4) Liquefied Natural Gas Facilities (49 CFR 193)
b. In addition to the structures above, CP and protective coatings must be provided
per NAVFACENGCOM policy for the following types of buried/submerged metallic
structures regardless of soil or water corrosiveness:
(1) Underground oxygen piping
(2) The waterside of new steel sheet-pile bulkheads
(3) New steel pile pier supports and steel fender piles
(4) Steel water storage tanks (elevated or reservoirs)
(5) Underground structures storing hazardous products
(6) Steel utility piping in soils having resistance b elow 100,000 ohm-cm
(7) The exterior bottom of aboveground POL tanks
(8) Hydraulic piston cylinders for elevators and lifts (standard CP design)
c. The requirement for CP, protective coatings and joint bonding on the following
types of structures must be determined by economic analysis and the recommendations of
a qualified corrosion engineer based on soil resistance or corrosiveness if submerged:
(1) Ferrous metal gravity sewer lines (any soil resistance)
(2) Existing steel waterfront structu res
(3) Buried ductile/cast iron pipe (soil resistance above 10,000 ohm -cm: joint
bonds only)
(4) Concrete encased rebar in piles for piers, seawalls and quay walls.
(5) Steel sheet-piles (landslide)
(6) Underground compressed gas distribution systems (except oxygen)
(7) Water distribution systems
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