Figure 8-12.Ground storage reservoir.
Figure 8-13.Three types of elevated storage tanks.
GROUND LEVEL STORAGE.During early
spring, ground level storage facilities should be
inspected for watertightness and structural conditions
and repairs made as necessary; at other intervals, the
maintenance procedures set forth in the following
paragraphs should be performed.
Semiannually, exterior walls should be marked
where leakage or seepage occurs. Every spring, they
should be inspected for seepage or leakage from
cracks-breaks or cracks in the interior seal
membrane. Dewater the tank and check both the
interior and exterior surfaces for spalling caused by
frost action, as well as settlement, cracks, and
All loose, scaly, or crumbly concrete should be
removed and the wall patched with rich cement grout
after wetting and painting with portland cement slurry.
Hardened grout should be painted with iron
waterproofing compound or a similar preparation.
Cracks of 1/4-inch width and l-inch depth should
be chipped out. The cleaned crack should be moistened
and painted with a cement slurry. The crack should be
filled with a rich cement grout, dry enough to stay in
place in the crack, but not dry enough to allow it to
slough off. When the grout has hardened, it should be
painted with iron waterproofing compound, or a