replace the existing structures. The provisions of Sections 8
of this handbook are applicable. In general, if the dike does
not retain rainwater, improvements are necessary.
LEAK DETECTION. When rehabilitating fuel
facilities, install leak detection, if necessary, as detailed
in Section 2 of this handbook.
CATHODIC PROTECTION. When rehabilitating any fuel
facility, install or upgrade cathodic protection. Ensure
cathodic protection systems are designed by a NACE certified
Corrosion Specialist or Cathodic Protection Specialist or a
registered professional Corrosion Engineer. Install cathodic
protection on all steel structures including, but not limited
to, aboveground storage tanks, underground storage tanks, and
8 of this handbook are applicable.
ISOLATION VALVES. To eliminate the need for costly
system down-time, install double block and bleed valves for
isolating components requiring maintenance and portions of
transfer and hydrant system piping. Install blind flanges to
conduct periodic hydrostatic testing. Comply with Standard
Design AW 78-24-28 and the provisions of Sections 2, 3, and 4
of this handbook. Before adding isolation valves, evaluate
piping system and make modifications to prevent pressure
buildup created by thermal expansion. Review paragraph on
and dispose of petroleum-contaminated soil disturbed during
rehabilitation in accordance with state and local
environmental regulations. Collect, test (if appropriate),
and treat petroleum-contaminated groundwater removed during
dewatering by one of the following methods:
a) Off-site disposal at an industrial waste
b) On-site treatment with a portable groundwater
c) Treatment through an oil/water separator.
d) Treatment through the sanitary sewer.