SECTION II. TERMS
Paved space located after the wash stations to allow replace-
Rainfall catchment area common to a single runoff point.
ment of interior items, drying, assembly of vehicles into units,
and final inspection prior to exiting the CVWF.
Construction used to collect and/or divert surface waters to a
collection system; includes inlets, trench drains, catch basins,
Clay with a high content of the mineral montmorillonite group.
Characterized by high adsorption and very high volume changes
with wetting and drying.
Area of a prewash facility that serves both wheeled and
Process in which bacteria and other microrganisms use waste
constituents as a food source; results in the breakdown of
Usable depth of sediment basin and/or lagoon for treatment or
complex organic materials into simple, more stable sub-stances.
settling purposes, after deducting the depth reserved for storage
of solids and freeboard allowance.
Driving lane reserved for vehicles in the CVWF to go past the
prewash basin and/or the wash stations to expedite forward
Liquid flowing out of a reservoir, basin, tank, or other container.
Structure used to dampen erosion potential of a flowing body of
Developed portion (city-like area) of a permanent military
water by reducing its forward velocity.
Central vehicle wash facility
Receptacle used to dampen variations in the flow of water.
Structure designed specifically to clean large numbers of
tactical or transportation motor pool vehicles.
Rate at which water becomes a vapor and is lost from a body of
Chemical oxygen demand
Standard laboratory procedure for measuring the oxygen
required for oxidation of carbonaceous (organic) material in
Total volume of water necessary to flood the surface of a filter
to a specific depth.
Period required to clean a CVWF, including drainage and
Granular material (sand and/or gravel) in a filter through
cleaning of the prewash bath.
which water passes.
Fine-grained soil that sticks together, such as a clay or silt.
Unit operation in which solid or colloidal material is separated
from a liquid by movement through a granular or porous
material such as sand.
Network of underground conduits and appurtenances that
receives and conveys wastewater.
Device installed in the bottom of a water bath at a prewash
facility for causing the wheels or tracks of a vehicle to move up
Microscopic suspended particles that do not settle in a standing
and down (flex) to assist in removing dirt from the vehicle.
liquid and can be removed only by coagulation or biological
Devices such as water sprays that increase water flow and
velocity to prevent solids deposition or to remove deposited
Structure at a CVWF that provides the operator a central
solids in a pipe, channel, or other conduit.
location to observe the washing operations and regulate pumps,
valves, and other equipment.
Distance in elevation from the maximum water surface of a tank
or basin to the top of its walls or overflow.
Theoretical period that it takes a particle of matter to flow
through a tank or basin.
Inclination or slope of a surface in terms of a ratio or percentage
Solid material remaining in a wastewater after filtering; deter-
of vertical rise to horizontal distance.
mined by specific tests.
General term used to describe the lubricants applied to tactical
Receptacle that automatically and hydraulically empties itself
and TMP vehicles.
each time it is filled to capacity.