ARIZONA MINING PERMITTING GUIDE - AZGS Document Repository

Above-Ground Fuel Storage - Continued
Arizona Mining Permitting Guide
All above-ground tanks over 100 gallons shall bear a label and/or placard in accordance with
their U.L. 142 listing. Signs shall be posted in the storage areas prohibiting open flames and
smoking. (UFC 79.407)
Plans shall be submitted with each application for use of above-ground fuel storage tanks
greater than 5000 gallons. The plans shall indicate:
1. All the details of installation.
2. Quantities of the flammable or combustible liquids to be stored.
3. Distances from building and/or building openings, and property lines, access ways,
electrical lines.
4. Provisions for drainage and runoff details, diking, type of building construction within
50 feet of installation and any associated equipment required, i.e.; piping, pumps, etc.
(UFC 79.403)
Where end failure of horizontal tanks can expose property to any fire or explosion danger, the
tank shall be placed with the longitudinal axis parallel to the nearest important exposure.
(Buildings, highways, or public roads.) (UFC Sec.79.503 (h))
A maximum of 1,100 gallons of fuels in closed containers and portable tanks may be stored
adjacent to buildings located on the same premises and under the same management. In this
case, the building may not exceed one story in height. Such buildings shall be of fire-resistant
construction and must be devoted principally to the storage of liquids or the exterior building
wall adjacent to the storage area shall have a fire-resistance rating of not less than two hours,
having no opening to above-grade areas within 10 feet horizontally of such storage and no
openings to below-grade areas within 50 feet horizontally of such storage. (UFC 79.404 29
C.F.R. 1910.106 (d)(5)(vi)(a))
The distance between any two flammable or combustible liquid storage tanks shall not be less
than three feet. (29 C.F.R. 1910.106 (b) (2) (ii))
Storage areas shall be protected against tampering or trespassers by fencing and/or other
control measures. The area shall be kept free of weeds, debris and other combustible
materials. A distance of not less than 15 feet shall be maintained between the storage tanks
and any combustible material. (UFC 79.406)
LOCATION OF ABOVE-GROUND TANKS (DISTANCES): (UFC Sec 79.403)
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CLASS DISTANCE TO PROPERTY LINE (ft) DISTANCE TO PUBLIC WAY, BLDG. (ft)
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I-A (50) (10)
I-E (50) (10)
I-C (50) (10)
II (25) ( 5)
III (10) ( 5)
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