MIL-HDBK-1022
8.11.8
Dike Access. Provide concrete, steel, or aluminum
steps with pipe handrails for passage across a dike. Steps
and handrails must comply with 29 CFR 1910.36. Include a
removable section of the handrail to provide access to the
flat top of earthen dikes. If steel steps are used, they
should be hot-dipped galvanized after fabrication. Provide
enough access locations for safe emergency egress and for
normal operation. This will normally include steps over the
dikes separating adjacent tanks, as well as on one wall
without an adjacent tank. Locate steps at the most accessible
points, preferably on the same side as the access stairs to a
tank roof. For tanks over 50,000 barrels (7900 m3), consider
providing earth-filled ramps to permit passage of vehicles
over the dike. In such cases, provide a concrete paved road
or other means of providing vehicle travel-ways. A removable
steel bulkhead section may be a cost-effective method to
provide access for dikes with vertical reinforced concrete
walls.
8.12
MISCELLANEOUS USE TANKS. This section provides
design guidance for small miscellaneous use tanks. These
tanks are typically less than 550 gallons (2100 L) in
capacity. Check state and local regulations before beginning
design.
8.12.1
Installation. Install the tank in conformance with
the requirements of NFPA 30. The exception allowed for the
deletion of dike containment is acceptable if all of the
criteria associated with that exception are met. Provide
containment for all tanks, regardless of size, except small
residential heating oil tanks, by complying with Paragraph
8.11 of this handbook or by using properly installed
aboveground concrete-encased tanks in accordance with
Paragraph 8.5 of this handbook.
8.12.2
Heating Oil Tanks.
Comply with NFPA 31.
8.12.3
Emergency Generator Fuel Tanks.
Comply with NFPA
31, NFPA 37, and NFPA 110.
8.12.4
Fire Pump Fuel Tanks.
Comply with NFPA 20, NFPA 30,
and NFPA 31.
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