aviation turbine fuel to the environment and water
infiltration. Slope pit floors to a sump and provide manually
operated sump pumps to aid in water removal. Use either
rolling or light-weight hinged aluminum pit lids with a water-
tight design. Comply with Standard Design AW 78-24-28.
Distribution Piping. Minimize the use of unlined
carbon steel pipe, especially with jet aircraft. A number of
alternatives exist which reduce the exposure of aviation
turbine fuel to unlined carbon steel pipe. One option is to
internally coat existing systems without pipe removal. In-
situ coatings can prevent fuel degradation; however, final
filtration must still be provided at the aircraft by either a
mobile or fixed filter/separator. Another option is to sleeve
the piping with a non-ferrous material (stainless steel).
Consider this option if reduced flow rates are acceptable.
Control Valves. Consider reusing existing control
valves wherever possible. Control valves can typically be
refurbished by either the original manufacturer or by a
factory authorized repair facility for less than the
replacement cost. Ensure refurbishers modify or replace pilot
assemblies, tubing, and solenoids to meet specifications as
outlined in Standard Design AW 78-24-28. As a minimum,
replace non-ferrous pilot tube assemblies with either aluminum
or stainless steel units. Provide stainless steel control
tubing and replace all internal valve components. If the
valve body is carbon steel, request Service Headquarters to
determine if the valve body should be sand-blasted and cleaned
or replaced. Coat or electro-nickel plate carbon steel bodies
to meet Standard Design AW 78-24-28.
Hydrant Outlets. Remove and replace existing
hydrant outlets and connections (e.g., Buckeye) with API
adapters. Conversion to API adapters ensures compatibility
(regulating and surge) in accordance with Standard Design AW
78-24-28 does not exist at the hydrant pit or at the lateral
control pit, then install a control valve at either location.
DIKES, LINERS, AND BASINS. If dikes, liners, and
basins do not comply with the requirements of this handbook,
40 CFR 112, state, or local spill containment regulations and
the potential for accidental fuel discharges exists, repair or