6.15

Question 1

Ensure there are adequate quantitates of water for drinking, cooking and cleaning

Answer 1

Unit Commander

Question 2

Provides sufficent potable water

Answer 2

Engineering O

Question 3

Advises the CO on water quality, test water quality

Answer 3

MDR

Question 4

All sources of water in the field are _____ until tested

Answer 4

Unsafe

Question 5

Influences on water quality

Answer 5

Quality, quantity, Accessibility

Question 6

Surface water

Answer 6

Comes from lakes, rivers, streams, seas and oceans
Dirtiest
Placed so least amount of contamination ensues

Question 7

Ground water

Answer 7

Wells and springs
Water is mostly clean
quantity issue
30 yards upstream of any contamination

Question 8

Does bottled water still need to be tested?

Answer 8

Yes

Question 9

Typical field water treatment processes

Answer 9

(1) Straining
(2) Chemical addition
(3) Coagulation
(4) Sedimentation
(5) Various kinds of filtration

Question 10

Most common field water purification device

Answer 10

ROWPU

Question 11

USMC Lightweight medium tactical freshwater purification

Answer 11

Purifies fresh water
3000 gallons per hour

Question 12

Lightweight Wate purifier

Answer 12

125 gallons per hour

Question 13

Tactical water purification system

Answer 13

1500 gallons per hour
Replacing ROWPU
Smaller

Question 14

Types of disinfectants

Answer 14

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

Question 15

Most common way of disinfecting field water

Answer 15

Chloronation

Question 16

What ppm should water be received at in the field

Answer 16

1 ppm, if not rechlorinate
If received below .2, chlorinate to 2ppm and wait 30 min

Question 17

When and how can we use surface water or well water if we use disinfectant?

Answer 17

Chlorinate to 5ppm, wait 30 min and retest
only in an emergency

Question 18

Tablets for a water canteen

Answer 18

2 Iodine, 30 min contact time

Question 19

Tablets for 2 court canteen

Answer 19

4 iodine, 30 min contact time

Question 20

Tablets for 5 gallon jug

Answer 20

40 iodine tablets, 30 min contact time

Question 21

If water is cloudy or dirty looking, how many iodine tablets do you put in?

Answer 21

Double

Question 22

Types of containers for water storage in the field

Answer 22

-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

Question 23

3 modules of the Water Distribution and waste management system

Answer 23

(a) Water distribution set
(b) Hospital
(c) Deployable Medical System (DEPMEDS)

Question 24

Disinfection procedures for field water containers

Answer 24

Method 1
Method 2
Mechanical
Alternative

Question 25

Mechanical Cleaning

Answer 25

Scrub inside of tank with disinfectant

Question 26

Method 1 cleaning

Answer 26

Chlorinate to 100 ppm
60 minute contact time

Question 27

Method 2

Answer 27

5 gallon bucket chlorinated to 100 ppm, swab the inside of container for 60 minutes
Least preferred, used when not enough water or disinfectant

Question 28

Alternative method

Answer 28

Chlorinate water to 10 ppm, hold for 24 hours