TM 5-814-9
CHAPTER 3
MASTER PLANNING
3-1. Sizing
length of time it will take for all the vehicles
scheduled to wash in this peak exercise to
a. User input. The wash facility must be designed to meet
return to the cantonment area after training.
the user's needs. The design will determine the type, size, and
The rate of movement of these vehicles will
configuration of the wash facility and treatment system based on
help determine the time period to allow for in
information supplied by the installation. Proper initial planning
the peak use operation. Ideally the CVWF
will result in the best final design. The planner will have to
would accommodate all units as they arrived,
assemble data from many sources and use judgment in applying
without excessive backup, and at a continuous
this data to the guidelines provided for sizing the facility
full utilization of the washing components. It
components. Where data is not available, estimates must be
is important that the planner consider the
made.
frequency of the defined peak use; in some
cases, a large-scale facility may not be
Military mission data. The wash facility must sup--
(1)
justified based on the low frequency of this
port the particular needs of the installation. Troop
peak activity. The peak use should be a
types, their vehicle types, and their training
condition expected to occur at least three
program, both current and future, must be
times per year.
considered. This includes resident troops as well as
transient troops. The combination of numbers of
Vehicle soiling data. The types of soil found in the
(3)
vehicles, types of vehicles, and frequency of
training ranges along with weather conditions are
washing will determine the type and size wash
predictors for the amount of dirt which will have be
facility required. A complete list of each military
to washed off of the vehicles. This will affect the
unit which will use the facility is required, along
type of washing components, the time required for
with its vehicular complement and the expected
washing, the amount of water used and the waste-
frequency each vehicle would be washed.
water treatment components.
(2)
(a)
A characterization of the soils is needed. A
wash facility will be sized based on long term or
study of the installation maps showing soil
average numbers of vehicles washed. Other com-
types throughout the total training areas
ponents are sized on short term or peak use
should be made to determine if sands, clays,
numbers. In both cases, the mix of vehicle types is
or combinations of soils occur. Samples of
an important consideration.
Soils should be taken from the range areas, as
well as samples taken directly from dirty
(a)
The average use of the facility should be pro-
vehicles returning to the cantonment area
vided by the user broken down as weekly or
after a heavy rain. Separate samples should be
biweekly, monthly, and annually. Seasonal
collected for each identifiable soil type (3 to 5
variations must also be a consideration.
gallons each) and analyzed in a soils
Where training programs are impacted by
laboratory. The laboratory should prepare a
seasonal weather or where large numbers of
standard gradation curve of grain size
transient units in a particular part of the year
distribution showing gravel, sand, silt, and
impact expected use, the average weekly or
clay utilizing both a mechanical analysis and
monthly numbers would not be a fixed ratio of
a hydrometer analysis down to 0.001 mm
the average annual numbers. Monthly average
diameter. Both a dispersed and a non-
should be the average of the six highest use
dispersed hydrometer analysis need to be
months; weekly should be the average of the
performed. The dispersed, which breaks the
ten highest use weeks.
particles into individual grains, is used for
standard classification. This will be used to
(b)
The peak use of the facility should be
categorize the soiling expected on the
provided by the user as the largest number of
vehicles. The dispersed, which assesses the
vehicles to be washed in a continuous short
agglomerated particles, is used in the
term period. If night washing is to be
treatment analysis (chap 6), since the washing
designed for, the peak use may, for example,
operation does not totally disperse the soil.
be a continuous three day (72 hour) period.
Figure 3-1 shows an example of a cohesive
The peak use will represent full utilization of
(silty clay) soil gradation curve both dispersed
the wash facility components for the chosen
and dispersed. Figure 3-2 shows an example
time period. The planner must consider the
of a noncohesive (sandy) soil.
3-1
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