TM 5-814-9
is limited to 3 million gallons (11.36 million
Since the installation is flexible with respect to washing times,
liters) per day. Daily water usage at the instal-
the designer rounds the number of lanes as described in chapter
lation is 2 million gallons (7.57 million liters)
3. One tracked lane and two dual-purpose lanes were
per day, with 1 million gallons (3.79 million
recommended to accommodate the Regular Army's needs.
liters) reserved for firefighting. No water is
Using the above information, the numbers of tracked and dual-
available for expansion of facilities. However,
purpose lanes required for washing after routine daily training
it is estimated that the motor pools now use
exercises are computed:
0.13 to 0.20 million gallons (0.49 to 0.76
=
1.42 lanes
C. Number of tracked
0.80 x 8 veh/team x 4 teams
million liters) of water per day to wash
lanes
6 veh/hr/lane x 3 hr
vehicles. Part of this volume of conserved
water can be used as makeup water for the new
D. No. dual-purpose
0.65 x 30 veh/team x 4 teams
=
2.36 lanes
lanes
11 veh/hr/lane x 3 hr
CVWF.
f. Sizing.
It is apparent that the one tracked vehicle lane and the two dual-
purpose lanes estimated above will meet the requirements for
(1) Bathprewash. The designer estimates that the
both major training exercises and routine daily training activi-
processing rate through the bath will be 6
ties.
vehicles per hour per tracked vehicle lane and
11 vehicles per hour per dual-purpose lane.
(b)
National Guard. The same computation is
This decision was based on the soiling index
used to compare the bath requirements for the
computed for the site and the processing rates
National Guard units except that a high
given in chapter 3 and illustrated on figure 3-4.
percentage of vehicles will use the bath
because there are few support vehicles and all
(a) Regular Army. The designer uses equa-
units are to be returned to the motor pool
tions 3-2 and 3-3 from chapter 3 to
extremely clean. It is estimated that 90 percent
determine how many tracked and dual-
of tracked vehicles and 75 percent of wheeled
purpose lanes are needed for prewashing
vehicles will use the bath prewash. Using
Regular Army vehicles. The tracked lanes
information from above, the number of bath
will be used for most of the large tactical
lanes required is computed:
vehicles; therefore, dual-purpose lanes are
estimated without including the tracked
E. No. tracked lanes
0.90 x 57 veh
=
1.07 lanes
vehicles, as discussed in chapter 3. The
6 veh/hr/lane x83 hr
F. F.
installation has estimated that 80 percent
F. No. dual-purpose lanes
0.75 x 204 veh
=
1.74 lanes
of the tracked vehicles and 65 percent of
11 veh/hr/lane x 8 hr
the wheeled vehicles returning from the
field will require immediate washing in
A comparison of the results shows that the one tracked lane and
the bath with the rest bypassing to the
two dual-purpose lanes will satisfy both Regular Army and
wash stations. It has been assumed that
National Guard needs at the prewash facility. Designer realizes
trailers and nonstandard vehicles, such as
that light-tracked vehicles may be washed in the dual-purpose
bulldozers and goers, will proceed directly
lanes.
to the wash stations. Other vehicles, such
as ambulances and support vehicles, may
(2) Wash stations. The clay content in the soils at
not require immediate washing and will
the installation and the requirement that ve-
use the facility at a later time.
hicles return to the motor pools well cleaned
Malfunctioning vehicles may be returned
for inspection and maintenance after washing
to the motor pool directly or may be left in
suggest that the processing time required for
the field until all other vehicles return.
troops to do a detailed washing at the wash
The designer has also considered vehicles
stations will be at the high end of the range.
in-tow such as tanks and trailers. Using
From the processing rates given in chapter 3
the vehicle counts from table A-2, the
(fig 3-4) and the soiling index (Si) previously
number of tracked and dual-purpose lanes
computed, the designer has determined that
required for washing after a major training
3.75 vehicles can be processed per hour in
exercise are computed:
each wash station following the prewash. For
the tracked vehicles not using the prewash, a
A. Number of tracked
0.80 x (538 veh) =
= 1.33 lanes
processing rate of 1.75 vehicles per hour is
lanes:
6 veh/hr/lane x (54 hr)
selected; and for wheeled vehicles not using
the prewash, a processing rate of 5 vehicles per
B. Number of dual-purpose
0.65 x (1973 veh) =
2.16 lanes
lanes:
11 veh/hr/lane x (54 hr)
hour is selected. Compute the number of wash
A-5
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