6.15 Flashcards
Ensure there are adequate quantitates of water for drinking, cooking and cleaning
Unit Commander
Provides sufficent potable water
Engineering O
Advises the CO on water quality, test water quality
MDR
All sources of water in the field are _____ until tested
Unsafe
Influences on water quality
Quality, quantity, Accessibility
Surface water
Comes from lakes, rivers, streams, seas and oceans
Dirtiest
Placed so least amount of contamination ensues
Ground water
Wells and springs
Water is mostly clean
quantity issue
30 yards upstream of any contamination
Does bottled water still need to be tested?
Yes
Typical field water treatment processes
(1) Straining
(2) Chemical addition
(3) Coagulation
(4) Sedimentation
(5) Various kinds of filtration
Most common field water purification device
ROWPU
USMC Lightweight medium tactical freshwater purification
Purifies fresh water
3000 gallons per hour
Lightweight Wate purifier
125 gallons per hour
Tactical water purification system
1500 gallons per hour
Replacing ROWPU
Smaller
Types of disinfectants
1) Calcium Hypochlorite (HTH), 65% to 70% (most common, granular form).
2) Sodium Hypochlorite 5% or 10% (unscented bleach).
3) Chlorine dioxide
4) Chlorine gas
5) Bromine
6) Chloramines ozone
7) UV radiation
Most common way of disinfecting field water
Chloronation
What ppm should water be received at in the field
1 ppm, if not rechlorinate
If received below .2, chlorinate to 2ppm and wait 30 min
When and how can we use surface water or well water if we use disinfectant?
Chlorinate to 5ppm, wait 30 min and retest
only in an emergency
Tablets for a water canteen
2 Iodine, 30 min contact time
Tablets for 2 court canteen
4 iodine, 30 min contact time
Tablets for 5 gallon jug
40 iodine tablets, 30 min contact time
If water is cloudy or dirty looking, how many iodine tablets do you put in?
Double
Types of containers for water storage in the field
-Onion 3000 gallon
-Potable water and distribution system (PWS/DS)
-Forward Area Water Point Supply System (FAWPSS)
-Semitrailer mounted Fabric Tank (SMFT) 3 or 5k gallons
-Tactical Water Distribution System (TWDS) 10 miles
-Water Distribution and waste management system
- 400 gallon
- 5 gallon can
- Individual water storage equipment
- 800 gallon water pod
3 modules of the Water Distribution and waste management system
(a) Water distribution set
(b) Hospital
(c) Deployable Medical System (DEPMEDS)
Disinfection procedures for field water containers
Method 1
Method 2
Mechanical
Alternative
